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CN106885289B - Electric heating system and control method thereof - Google Patents

Electric heating system and control method thereof Download PDF

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Publication number
CN106885289B
CN106885289B CN201710181805.4A CN201710181805A CN106885289B CN 106885289 B CN106885289 B CN 106885289B CN 201710181805 A CN201710181805 A CN 201710181805A CN 106885289 B CN106885289 B CN 106885289B
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unit
heat
electric
heating
water
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CN106885289A (en
Inventor
成岭
郭炳庆
金璐
蒋利民
钟鸣
覃剑
闫华光
黄伟
何桂雄
孟珺遐
张新鹤
杨东升
齐格
王蕊
王迎春
刘桁宇
孙龙印
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Jiangxi Electric Power Co Ltd
State Grid Corp of China SGCC
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Jiangxi Electric Power Co Ltd
State Grid Corp of China SGCC
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Publication of CN106885289A publication Critical patent/CN106885289A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0228—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with conventional heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

本发明涉及一种电采暖系统及其控制方法，包括：电蓄热锅炉单元通过第一换热单元的内循环管与供热区连接的水循环单元连接，热泵主机单元通过第二换热单元的内循环管与供热区连接的水循环单元连接，气候补偿器和控制单元均分别与电蓄热锅炉单元、热泵主机单元及水循环单元连接；本发明提供的技术方案，能够保证在用电低谷的时候，热泵和电蓄热锅炉单独或同时对循环水加热，解决了热泵温度提升有限的问题，提高了热利用效率，节省了能源。同时电蓄热锅炉将电能转换成热能储存在蓄热体中，在用电高峰的时候，电蓄热锅炉通过蓄热体释放热量对循环水进行加热实现室内供暖，缓解了电网的用电压力，为用户节省了用电费用。

Figure 201710181805

The invention relates to an electric heating system and a control method thereof, comprising: an electric heat storage boiler unit is connected to a water circulation unit connected to a heating area through an inner circulation pipe of a first heat exchange unit; The inner circulation pipe is connected with the water circulation unit connected to the heating area, and the climate compensator and the control unit are respectively connected with the electric heat storage boiler unit, the heat pump host unit and the water circulation unit; At times, the heat pump and the electric heat storage boiler heat the circulating water separately or at the same time, which solves the problem of limited temperature increase of the heat pump, improves the heat utilization efficiency and saves energy. At the same time, the electric heat storage boiler converts electric energy into heat energy and stores it in the heat storage body. When the electricity consumption peaks, the electric heat storage boiler releases heat from the heat storage body to heat the circulating water to achieve indoor heating, which relieves the power consumption pressure of the power grid. , saving electricity costs for users.

Figure 201710181805

Description

Electric heating system and control method thereof
Technical Field
The invention relates to the field of electricity utilization service, in particular to an electric heating system and a control method thereof.
Background
The development of the society and the improvement of the living standard of people, the power utilization structure is changed sharply, the peak power is seriously insufficient, the peak-valley difference is increased continuously, and the generator set runs in low efficiency in the valley period. The measures of 'peak clipping and valley filling' are absolutely necessary, and in addition, a boiler heating system consumes a large amount of coal resources, discharges a large amount of carbon dioxide, acid gas sulfur dioxide and solid particles, causes air pollution, and is one of the main reasons for causing haze weather.
The boiler has small heat utilization coefficient, low efficiency, incapability of efficiently utilizing heat energy resources, continuous heating day and night and high electricity utilization cost. The heat pump is difficult to operate in an extremely low temperature environment, the heating temperature of the heat pump is increased in a limited way, and energy consumption is huge when the water temperature is increased only in one step. The indoor temperature is affected by the change of the outdoor temperature, and particularly, when the outdoor temperature is higher, the degree of deviation of the indoor temperature from the set value is larger, so that the indoor temperature is too high, and the energy waste is caused by synchronous heating of the existing central heating areas such as an office area and a residential area, and the office area and the residential area.
Disclosure of Invention
The invention provides an electric heating system and a control method thereof, and aims to provide a heat pump and electric heat storage boiler combined electric heating system, which can relieve the electricity utilization pressure of a power grid and improve the electricity utilization economy of users in the indoor heating process.
The purpose of the invention is realized by adopting the following technical scheme:
in an electric heating system, the improvement comprising: the heat pump system comprises an electric heat storage boiler unit, a heat pump host unit, a water circulation unit, a control unit, a first heat exchange unit and a second heat exchange unit, wherein the electric heat storage boiler unit is connected with the water circulation unit connected with a heat supply area through an inner circulation pipe of the first heat exchange unit;
the electric heat storage boiler unit is used for storing heat in the electricity consumption or low-price valley period and utilizing the heat energy stored for heating;
the heat pump main unit is used for heating by utilizing the heat energy of a low-level heat source;
the water circulation unit is used for respectively transmitting the heat energy provided by the electric heat storage boiler unit and the heat pump main unit to a heating target through circulation flow;
and the control unit is used for adjusting the heating heat transferred to the heating area by the water circulation unit according to the indoor temperature.
Preferably, the system further comprises: and the climate compensator is respectively connected with the electric heat storage boiler unit, the heat pump main unit and the water circulation unit and is used for adjusting the heating heat of the electric heat storage boiler unit and the heat pump main unit to a heating area according to the outdoor temperature.
Preferably, the heat pump main unit includes: the system comprises an underground heat exchanger, an expansion valve, a liquid storage tank, a gas-liquid separator and a compressor, wherein the gas-liquid separator and the compressor are sequentially arranged on an inlet pipeline of an external circulation pipe of the second heat exchange unit from an outlet of the underground heat exchanger, and the liquid storage tank and the expansion valve are sequentially arranged on an inlet pipeline of the external circulation pipe of the second heat exchange unit from an outlet of the external circulation pipe to the underground heat exchanger.
Preferably, the electric heat storage boiler unit includes an electric heat storage boiler, and an external circulation line connecting the electric heat storage boiler and the first heat exchange unit.
Further, the electric heat storage boiler includes: the heating device comprises a heat storage brick, heating wires, a hot air channel, a controllable valve, a variable frequency fan and a furnace temperature sensor, wherein the heating wires are embedded in the heat storage brick, the furnace temperature sensor is embedded in the heat storage brick, the direction of the furnace temperature sensor is vertical to the direction of the heating wires, layers of the heat storage brick are arranged between the layers to form the hot air channel, two ends of the hot air channel are connected with the controllable valve, the controllable valve is connected with the variable frequency fan, and the variable frequency fan is connected with the first heat exchange unit;
the heat storage brick is used for storing heat energy; the heating wire is used for converting electric energy into heat energy; the hot air channel is used for transferring heat energy; the controllable valve is used for controlling the connection relation between the hot air channel and the variable frequency fan; the variable frequency fan is used for pushing heat energy to flow in the hot air channel; and the furnace temperature sensor is used for measuring the internal temperature of the electric heat storage boiler.
Preferably, the water circulation unit includes: two internal circulation pipelines are arranged in parallel at one side of the heat supply area;
one of the internal circulation pipes arranged in parallel comprises: a first internal circulation pipe section provided with a three-way valve and a water replenishing valve and arranged between the outlet of the heat supply area and the inlet of the first heat exchange unit, a second internal circulation pipe section provided with a flow monitor, a first electromagnetic valve and a heat collector circulation water pump and arranged between the outlet of the first heat exchange unit and the inlet of the second heat exchange unit, and a third internal circulation pipe section provided with an exhaust valve and arranged between the other outlet of the second heat exchange unit and the outlet of the heat supply area;
and the other internal circulation pipeline in the internal circulation pipelines arranged in parallel is provided with a three-way valve communicated with the third internal circulation pipeline section, and the first internal circulation pipeline section is provided with a three-way valve identical to the other internal circulation pipeline.
Preferably, the control unit includes: the system comprises an outdoor temperature sensor, an indoor temperature sensor, a water supply temperature sensor, a water return temperature sensor and a controller;
the water supply temperature sensor is arranged between a water replenishing valve of the water circulation unit and the electric three-way valve, and the water return temperature sensor is arranged between an exhaust valve of the water circulation unit and the indoor heating tail end;
the controller is respectively connected with a heating wire of the electric heat storage boiler unit, a controllable valve of the electric heat storage boiler unit, a variable frequency fan of the electric heat storage boiler unit, a compressor of the heat pump main unit, an electric three-way valve of the water circulation unit, a heat collector circulating water pump of the water circulation unit and an expansion valve of the heat pump main unit.
Further, the climate compensator is respectively connected with an outdoor temperature sensor, an indoor temperature sensor, a water supply temperature sensor, a water return temperature sensor of the control unit, a flow detector of the water circulation unit, an expansion valve of the heat pump host unit, a controllable valve of the electric heat storage boiler unit and a first electromagnetic valve of the water circulation unit;
the climate compensator is used for determining theoretical water supply temperature according to the numerical value of the outdoor temperature sensor, collecting actual water supply temperature of the water supply temperature sensor, comparing the theoretical water supply temperature with the actual water supply temperature, obtaining deviation and deviation change rate of the water supply temperature as input of the fuzzy PID controller inside the climate compensator, and obtaining first control quantity by using the fuzzy PID controller inside the climate compensator;
and the fuzzy PID controller in the climate compensator adjusts the opening degrees of the controllable valve of the electric heat storage boiler unit, the expansion valve of the heat pump main unit and the first electromagnetic valve of the heat pump main unit according to the first control quantity.
Preferably, the controller is configured to acquire an indoor temperature value of the indoor temperature sensor, compare the indoor temperature value with a set indoor temperature threshold, acquire a room temperature deviation and a room temperature deviation change rate, use the room temperature deviation and the room temperature deviation change rate as inputs of the controller internal fuzzy PID controller, and acquire a first control quantity by using the controller internal fuzzy PID controller;
and the fuzzy PID controller in the controller utilizes the first control quantity to adjust the opening of the electric three-way valve of the water circulation unit.
In a method of controlling an electric heating system, the improvement comprising:
the electric heat storage boiler unit is used for storing heat in the valley period of electricity utilization or electricity price and heating by using the heat energy stored in the heat storage boiler unit;
converting a low-level heat source into a high-level heat source by using a heat pump host unit, and heating by using heat energy of the low-level heat source;
controlling the water circulation unit to respectively transfer the heat energy provided by the electric heat storage boiler unit and the heat pump main unit to a heating target through circulation flow;
the controller acquires an indoor temperature value of an indoor temperature sensor, compares the indoor temperature value with a set indoor temperature to acquire a room temperature deviation and a room temperature deviation change rate, and uses the room temperature deviation and the room temperature deviation change rate as input of the fuzzy PID controller in the controller to acquire a first control quantity by using the fuzzy PID controller in the controller;
the fuzzy PID controller inside the controller adjusts the opening degree of an electric three-way valve of the water circulation unit by using the first control quantity;
the method comprises the following steps that a climate compensator determines water supply temperature according to the value of an outdoor temperature sensor, acquires the value of the water supply temperature sensor, compares theoretical water supply temperature with actual water supply temperature, obtains deviation and deviation change rate of the water supply temperature as input of a fuzzy PID controller inside the climate compensator, and obtains first control quantity by using the fuzzy PID controller inside the climate compensator;
and the fuzzy PID controller in the climate compensator adjusts the opening degrees of the controllable valve of the electric heat storage boiler unit, the expansion valve of the heat pump main unit and the first electromagnetic valve of the heat pump main unit according to the first control quantity.
The invention has the beneficial effects that:
according to the technical scheme provided by the invention, a heating technology combining a heat pump, an electric heat storage boiler, a climate compensator and a control unit is adopted, the electric heat storage boiler in the low valley period is used for heating and storing energy for heating in the peak period of power utilization, and meanwhile, the heat pump and the electric heat storage boiler in the low valley period are used for heating in a combined manner, so that the requirement of heating is met, the power in the valley period is fully utilized, the power cost is saved for users, the peak-valley difference of a power grid is relieved, the energy is saved, and the heat pump and the electric heat storage boiler sequentially heat circulating water, so that the heat utilization efficiency is improved. The climate compensator sets the water supply temperature according to the change of the outdoor temperature, and adjusts the opening of the valve by adopting a fuzzy PID algorithm, so that the heating according to the requirement is realized, the overhigh or overlow indoor temperature is avoided, and the energy is saved. The temperature is independently adjusted according to time and time of the single building, and the energy utilization rate is effectively improved.
Drawings
Fig. 1 is a schematic view illustrating a structure of an electric heating system according to the present invention;
FIG. 2 is a schematic structural view of an electric heat storage boiler unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an application scenario of an electric heating system in an embodiment of the present invention; fig. 4 is a connection diagram of an STC89C52 single chip microcomputer in the controller according to the embodiment of the present invention;
FIG. 5 is a detailed connection diagram of a bypass circuit in the controller according to an embodiment of the present invention;
FIG. 6 is a block diagram of fuzzy PID control in an embodiment of the invention;
FIG. 7 is a flow chart of fuzzy PID control in an embodiment of the invention.
The system comprises an electric heat storage boiler unit 1, a heat pump host unit 2, a water circulation unit 3, a control unit 4, a first heat exchange unit 5, a water supplement valve 6, a first electromagnetic valve 7, an indoor heating tail end 8, a heat collector circulating water pump 9, an exhaust valve 10, a second heat exchange unit 11, a compressor 12, a liquid storage tank 13, a gas-liquid separator 14, an expansion valve 15, an underground heat exchanger 16, a controller 17, an indoor temperature sensor 18, a water supply temperature sensor 19, an electric three-way valve 20, a return water temperature sensor 21, a flow detector 22, an outdoor temperature sensor 23, a climate compensator 24, heat storage bricks 101, a heating wire 102, a hot air channel 103, a controllable valve 104, a variable frequency fan 105 and a furnace temperature sensor 106, wherein the;
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides an electric heating system, as shown in fig. 1, including: the heat pump system comprises an electric heat storage boiler unit 1, a heat pump host unit 2, a water circulation unit 3, a control unit 4, a first heat exchange unit 5 and a second heat exchange unit 11, wherein the electric heat storage boiler unit 1 is connected with the water circulation unit 3 connected with a heat supply area through an inner circulation pipe of the first heat exchange unit 5, the heat pump host unit 2 is connected with the water circulation unit 3 connected with the heat supply area through an inner circulation pipe of the second heat exchange unit 11, and the control unit 4 is respectively connected with the electric heat storage boiler unit 1, the heat pump host unit 2 and the water circulation unit 3;
the electric heat storage boiler unit 1 is used for storing heat in the electricity consumption or electricity price valley period and heating by utilizing the heat energy stored in the heat storage;
the heat pump main unit 2 is used for heating by utilizing the heat energy of a low-level heat source;
the water circulation unit 3 is used for respectively transmitting the heat energy provided by the electric heat storage boiler unit 1 and the heat pump main unit 2 to a heating target through circulation flow;
the electric heat storage boiler unit is used for storing heat in the electricity consumption or low-price valley period and utilizing the heat energy stored for heating;
the control unit 4 is used for adjusting the heating heat transferred to the heating area by the water circulation unit according to the indoor temperature;
the system further comprises: and the climate compensator 24 is connected with the electric heat storage boiler unit 1, the heat pump main unit 2 and the water circulation unit 3 respectively, and is used for adjusting the heating heat of the electric heat storage boiler unit and the heat pump main unit to the heating area according to the outdoor temperature.
Specifically, the electric heat storage boiler unit 1, as shown in fig. 2, includes: heat accumulation brick, heater strip, hot air channel, controllable valve, frequency conversion fan and furnace temperature sensor, wherein, inlay in the heat accumulation brick the heater strip, furnace temperature sensor inlays in the heat accumulation brick, and is perpendicular with the direction of heater strip form between the layer of heat accumulation brick the hot air channel, the hot air channel both ends with controllable valve links to each other, controllable valve with the frequency conversion fan is connected, the frequency conversion fan with water circulating unit 3 connects.
The heat storage brick is used for storing heat energy; the heating wire is used for converting electric energy into heat energy; the hot air channel is used for transferring heat energy; the controllable valve is used for controlling the connection relation between the hot air channel and the variable frequency fan; the variable frequency fan is used for pushing heat energy to flow in the hot air channel; and the furnace temperature sensor is used for measuring the internal temperature of the electric heat storage boiler.
For example, in the electric heat storage boiler unit 1, electric energy is converted into heat energy through the heating wire 102, and the heat energy is stored in the heat storage brick 101 with a heat storage medium of a special alloy, so as to prevent the heat energy from being dissipated; collecting the value of a furnace temperature sensor 106, when the temperature in the electric heat storage boiler is lower than 400 ℃, continuously heating the heating wires of the electric heat storage boiler, and when the temperature in the electric heat storage boiler is higher than 500 ℃, stopping heating the heating wires 102 of the electric heat storage boiler; in the heating process, the controllable valve 104 is opened, the stored heat flows orderly in the hot air channel 103 through the built-in variable frequency fan 105, the heat is exchanged with circulating water flowing in the heat exchange pipe continuously in a circulating mode, the heated circulating water flows out of the heat exchange pipe into a circulating pipeline, and the electric heat storage boiler is characterized in that heat is stored in a power consumption valley period, the stored heat energy is used for supplying heat to users in a non-power consumption valley period, and therefore the purpose of heating is achieved.
The heat pump main unit 2, as shown in fig. 3, includes: the system comprises an underground heat exchanger 16, an expansion valve 15, a liquid storage tank 13, a gas-liquid separator 14 and a compressor 12, wherein the gas-liquid separator 14 and the compressor 12 are sequentially arranged on an inlet pipeline from an outlet of the underground heat exchanger 16 to an external circulation pipe of the second heat exchange unit 11, and the liquid storage tank 13 and the expansion valve 15 are sequentially arranged on an inlet pipeline from an outlet of the external circulation pipe of the second heat exchange unit 11 to the underground heat exchanger 16.
The second heat exchange unit 11 is configured to condense the temperature of the high-temperature liquid or gas to a set output temperature, and then input the cooled liquid to the liquid storage tank 13; the compressor 12 is used for receiving the gas delivered by the gas-liquid separator 14 and converting the gas into high-temperature and high-pressure gas; the liquid storage tank 13 is used for storing the cooled liquid transmitted by the second heat exchange unit 11; the gas-liquid separator 14 is used for receiving the gas-liquid mixture conveyed by the underground heat exchanger 16 and separating gas and liquid in the gas-liquid mixture; the expansion valve 15 is used for controlling the connection relationship between the liquid storage tank 13 and the buried heat exchanger 16; the underground heat exchanger 16 is used for absorbing heat in underground media and gasifying the heat into a gas-liquid mixture.
For example: the heat pump main unit 2 sends a control command through a communication line, the compressor 12 and the expansion valve 15 are started, after liquid losing a certain amount of heat in the second heat exchange unit 11 reaches the liquid storage tank 13, the liquid is changed into low-temperature low-pressure wet steam through the expansion valve 15, the low-temperature low-pressure wet steam absorbs heat in underground water or soil through the underground heat exchanger 16 and is gasified, the gasified gas is subjected to gas-liquid separation through the gas-liquid separator 14, the purified gas is changed into high-temperature high-pressure gas through the compressor 12 and is subjected to energy exchange on circulating water through the second heat exchange unit 11, the ground source heat pump utilizes heat energy of a low-level heat source to heat, the heat absorbed from the evaporator and the heat converted by the work consumed by the compressor 12 are taken away by a cooling medium in the condenser, and the heating purpose is achieved;
the water circulation unit 3 includes: two internal circulation pipelines are arranged in parallel at one side of the heat supply area; one of the internal circulation pipes arranged in parallel comprises: a first internal circulation pipe section provided with a three-way valve 20 and a water replenishing valve 6 from the outlet of the heat supply area to the inlet of the first heat exchange unit 5, a second internal circulation pipe section provided with a flow monitor 22, a first electromagnetic valve 7 and a heat collector circulation water pump 9 from the outlet of the first heat exchange unit 5 to the inlet of the second heat exchange unit 11, and a third internal circulation pipe section provided with an exhaust valve 10 from the other outlet of the second heat exchange unit 11 to the outlet of the heat supply area;
and the other internal circulation pipeline in the internal circulation pipelines arranged in parallel is provided with a three-way valve 20 communicated with the third internal circulation pipeline section, and the first internal circulation pipeline section is provided with a three-way valve 20 identical to the other internal circulation pipeline.
The first electromagnetic valve 7, the heat collector circulating water pump 9 and the electric three-way valve 20 are opened in the water circulation unit 3, circulating water flows in a water circulation line, and the circulating water which reduces heat absorbs the heat of the electric heat storage boiler unit 1 and the heat pump unit at the heat exchange pipe and the second heat exchange unit 11 in the electric heat storage boiler unit 1 and flows to the indoor heating tail end 8, wherein the flow detector 22 detects the flow of the circulating water, provides data to the control unit 4 in real time, and adjusts the opening degrees of the first electromagnetic valve 7, the water replenishing valve 6 and the exhaust valve 10 through the controller 17 to adjust the circulating flow and the water level of a heat supply pipeline.
The control unit is used for adjusting the heating heat quantity transferred to the heating area by the water circulation unit according to the indoor temperature, and comprises: an outdoor temperature sensor 23, an indoor temperature sensor 18, a water supply temperature sensor 19, a return water temperature sensor 21 and a controller 17;
the water supply temperature sensor 19 is arranged between the water replenishing valve 6 of the water circulation unit 3 and the electric three-way valve 20, and the water return temperature sensor 21 is arranged between the exhaust valve 10 of the water circulation unit 3 and the indoor heating tail end 8;
the controller is respectively connected with a heating wire of the electric heat storage boiler unit, a controllable valve of the electric heat storage boiler unit, a variable frequency fan of the electric heat storage boiler unit, a compressor of the heat pump main unit, an electric three-way valve of the water circulation unit, a heat collector circulating water pump of the water circulation unit and an expansion valve of the heat pump main unit.
And the climate compensator is respectively connected with an outdoor temperature sensor, an indoor temperature sensor, a water supply temperature sensor, a water return temperature sensor of the control unit, a flow detector of the water circulation unit, an expansion valve of the heat pump main unit, a controllable valve of the electric heat storage boiler unit and a first electromagnetic valve of the water circulation unit.
Further, the climate compensator is used for determining theoretical water supply temperature according to the value of the outdoor temperature sensor, collecting actual water supply temperature of the water supply temperature sensor, comparing the theoretical water supply temperature with the actual water supply temperature, obtaining deviation and deviation change rate of the water supply temperature as input of the fuzzy PID controller inside the climate compensator, and obtaining first control quantity by using the fuzzy PID controller inside the climate compensator;
and the fuzzy PID controller in the climate compensator adjusts the opening degrees of the controllable valve of the electric heat storage boiler unit, the expansion valve of the heat pump main unit and the first electromagnetic valve of the heat pump main unit according to the first control quantity.
The controller is used for acquiring an indoor temperature value of the indoor temperature sensor, comparing the indoor temperature value with a set indoor temperature threshold value, acquiring room temperature deviation and room temperature deviation change rate as input of the fuzzy PID controller in the controller, and acquiring a first control quantity by utilizing the fuzzy PID controller in the controller;
and the fuzzy PID controller in the controller utilizes the first control quantity to adjust the opening of the electric three-way valve of the water circulation unit.
In the optimal implementation scheme provided by the invention, the controller is the key for realizing the automatic operation of the whole system, and comprises a singlechip main control part, a temperature sensor, a liquid crystal display part, an independent key, a clock, a reset circuit and the like, wherein the core part of the controller is mainly an STC89C52 singlechip, and the STC89C52 is a low-power-consumption and high-performance CMOS 8-bit singlechip which sends signals to control the operation of each module. The connection diagram of the STC89C52 single chip microcomputer is shown in figure 4, and the detailed connection diagram of the bypass circuit in the STC89C52 single chip microcomputer is shown in figure 5, and the connection diagram has four 8-bit bidirectional input and output ports of P0, P1, P2 and P3 in total, and each port has a latch, an output driver and an input buffer. When the port P0 is used for external expansion storage, the port P0 is used as an address bus or a data bus; port P1 is used only as I/O and has no secondary function; the port P2 is used as an address bus when used as an extended memory. While port P3 is used as I/O, its second function is some special functions, non-expansion storage. RST is the reset input, which is implemented when a high level of two machine cycles is applied to this pin. ALE/PROG is an address latch control signal. When the pin inputs a programming pulse, it is FLASH programming. XTAL1 and XTAL2 are used to externally connect crystal oscillator pins.
Three pins P2.0, P2.1 and P2.3 of the port P2 are connected to the control terminal of the LCD module 1602, and the port P1.0 is connected to the bus terminal of the temperature sensor DS18B20 and has a pull-up resistor of 10K. The port P1.1 is connected with a control pin of the relay 1, the port P1.2 is connected with a control pin of the relay 2, the relay 1 is connected with the first electromagnetic valve 4, the port P1.4 is connected with a button P1.5, and when the button is pressed, the level is pulled down. The RST pin is connected with a reset circuit, and receives high-level reset when a key is pressed. XTAL1 and XTAL2 are connected with a crystal oscillator clock circuit, and a crystal oscillator provides a stable clock period with a single chip.
The indoor temperature sensor is DS18B20, a digital transmission temperature sensor, which can be programmed. Because DS18B20 only needs a single-wire interface to send and receive information, we connect its control line to a pull-up resistor of 10k and then connect it with the P1.0 port of the single-chip. The power supply required for reading and writing and converting the temperature can also be directly obtained from the data line without an additional external power supply. As an element for temperature acquisition and A/D conversion of the system, the system has the advantages of high precision, small volume, wide voltage application range, flexible system design and the like.
The invention also provides a heating system control method, which comprises the following steps:
the electric heat storage boiler unit is used for storing heat in the valley period of electricity utilization or electricity price and heating by using the heat energy stored in the heat storage boiler unit;
converting a low-level heat source into a high-level heat source by using a heat pump host unit, and heating by using heat energy of the low-level heat source;
controlling the water circulation unit to respectively transfer the heat energy provided by the electric heat storage boiler unit and the heat pump main unit to a heating target through circulation flow;
the controller acquires an indoor temperature value of an indoor temperature sensor, compares the indoor temperature value with a set indoor temperature to acquire a room temperature deviation and a room temperature deviation change rate, and uses the room temperature deviation and the room temperature deviation change rate as input of the fuzzy PID controller in the controller to acquire a first control quantity by using the fuzzy PID controller in the controller;
the fuzzy PID controller inside the controller adjusts the opening degree of an electric three-way valve of the water circulation unit by using the first control quantity;
the method comprises the following steps that a climate compensator determines water supply temperature according to the value of an outdoor temperature sensor, acquires the value of the water supply temperature sensor, compares theoretical water supply temperature with actual water supply temperature, obtains deviation and deviation change rate of the water supply temperature as input of a fuzzy PID controller inside the climate compensator, and obtains first control quantity by using the fuzzy PID controller inside the climate compensator;
and the fuzzy PID controller in the climate compensator adjusts the opening degrees of the controllable valve of the electric heat storage boiler unit, the expansion valve of the heat pump main unit and the first electromagnetic valve of the heat pump main unit according to the first control quantity.
For example: during the night-time electricity consumption valley period, the controller 17 issues the following control commands via the communication line: opening a first electromagnetic valve 7, a collector circulating water pump 9, a compressor 12, an expansion valve 15, a heating wire, a controllable valve, a variable frequency fan and an electric three-way valve 20, acquiring outdoor temperature by a climate compensator 24, acquiring relatively low temperature at night, calculating ideal water supply temperature according to the change of the outdoor temperature and the set indoor temperature and a curve set in the climate compensator 24, acquiring actual water supply temperature, obtaining the deviation and the deviation change rate of theoretical water supply temperature and actual water supply temperature, adjusting the opening degrees of the heat pump expansion valve 15 and the controllable valve of the electric heat storage boiler by using a fuzzy PID algorithm, increasing the heat of a primary side heat source entering a heat exchanger, adjusting the opening degree of the first electromagnetic valve 7 at the same time, achieving double adjusting effects of quality adjustment and quantity adjustment, enabling the water supply temperature of secondary side circulating water to be close to the theoretical value, and monitoring return water temperature, and correcting the operation curve, and entering an electric heat storage boiler heat storage and heat pump and electric heat storage boiler combined heating operation mode. During peak electricity usage on the next day, the controller 17 issues the following control commands via the communication line: closing the compressor 12, the expansion valve 15, the heating wire, opening the first electromagnetic valve 7, the heat collector circulating water pump 9, the controllable valve, the variable frequency fan and the electric three-way valve 20, acquiring outdoor temperature by the climate compensator 24, increasing the outdoor temperature in the daytime, working out the right water supply temperature according to the change of the outdoor temperature and the indoor temperature set in different time periods and the curve set in the climate compensator 24, adjusting the opening degrees of the heat pump expansion valve 15 and the controllable valve of the electric heat storage boiler, reducing the heat of the primary side heat source entering the heat exchanger, adjusting the opening degree of the first electromagnetic valve 7 at the same time, achieving the double adjusting effect of quality adjustment and quantity adjustment, enabling the water supply temperature of the secondary side circulating water to be close to the theoretical value, monitoring the return water temperature and the indoor temperature, correcting the operation curve, and entering the heating operation. When the temperature of the heat storage bricks in the electric heat storage boiler is less than 200 ℃, the heat pump is started again to heat the circulating water, so that the circulating water can be continuously heated.
Further, the fuzzy PID controller is a known technology, the structure diagram of which is shown in fig. 6, and in the embodiment provided by the present invention, the control principle is shown in fig. 7, which includes:
step 1, input and output fuzzification. The input quantity of the fuzzy controller is room temperature deviation e and deviation change rate ecTo transportThe output quantity is the adjustment quantity delta K of PID parametersP、△KIAnd Δ KD. Determining their linguistic variables, fundamental domains, fuzzy subsets, fuzzy domains and quantization factors, the fundamental domain of room temperature deviation e being [ -5,5]Rate of change of deviation ecIs [ -3,3]The basic domains of PID three-parameter adjustment are [ -0.3,0.3],[-0.06,0.06],[-1.2,1.2]. The fuzzy domain of each variable is [ -6,6 [)]. Room temperature deviation e quantization factor 5/6 is 0.83, deviation rate of change ecThe quantization factor of (3) is 3/6-0.5, and the quantization factors of the PID three-parameter adjustment amounts are 0.3/6-0.05, 0.06/6-0.01, and 1.2/6-0.2, respectively. According to the object to be controlled, the room temperature deviation e and the deviation change rate ecAnd PID controller parameter adjustment quantity delta KP、△KIAnd Δ KDE, EC and KP、KI、KDThe universe of ambiguity in (a) is described by seven fuzzy linguistic variables. Their fuzzy subsets are all [ NB, NM, NS, ZO, PS, PM, PB]Respectively represent [ negative large, negative middle, negative small, zero, positive small, positive middle, positive large]。E、ECAnd KP、KI、KDThe domains of (a) are quantized to thirteen levels: { -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6}. The membership function of each variable is obtained by adopting a triangular membership function:
Figure GDA0002643204660000101
in the formula, parameters a and b determine the feet of a triangle, and parameter b determines the peak of the triangle;
input variable deviation e and deviation change rate ecAs shown in table 1:
TABLE 1 input variables deviation e and deviation Change Rate ecMembership degree vector table
Figure GDA0002643204660000102
And 2, fuzzy control algorithm. Fuzzy control rules are typically based on long-term accumulated experience of experts or manual operatorsIt is a language representation of human intuitive reasoning. Input variables of heat pump and electric heat storage boiler combined electric heating system are deviation e and deviation change rate ecThe corresponding linguistic variables are E and EC, and the following PID three-parameter proportionality coefficient K is determinedPIntegral coefficient KIAnd a differential coefficient KDThe fuzzy controller is utilized to find out three parameters K of PID at different momentsP、KI、KDAnd ecThe fuzzy relation of (1).
The control rate formulated in the embodiment provided by the invention is as follows:
1) when | E | is large, a large K is selected to increase the response speed of the system and avoid the deviation from the control range due to the supersaturation of the derivative caused by the instantaneous increase of EPAnd a smaller KDWhile in order to prevent overshoot of the system, parameter KIIs set to 0.
2) When | E | is in the middle range, all 3 parameters should be smaller in order to reduce overshoot of the system, but the smaller K is selected in consideration of ensuring the response speed of the systemP、KIAnd KDThe value is moderate.
3) When | E | is small, important consideration should be given to ensure that the system has good stability, so a larger K should be selectedPAnd KIWhile avoiding system oscillation, improving the anti-interference ability, KDShould be properly chosen, when | EC | is larger, KDGet smaller, and conversely when | EC | is smaller, KDThe larger the size. According to the above control rules, 3 fuzzy control rules are shown in the following tables 2,3 and 4, respectively:
TABLE 2KPFuzzy control rule table
Figure GDA0002643204660000111
TABLE 3KIFuzzy control rule table
Figure GDA0002643204660000112
TABLE 4KDFuzzy control rule table
Figure GDA0002643204660000121
The basic structure can be summarized as if A and B then C, and the fuzzy relation R implied by each fuzzy rule is calculated as follows:
Figure GDA0002643204660000125
in the formula
Figure GDA0002643204660000122
Is a fuzzy relation matrix (A is multiplied by B)m×nFormed m x n column vectors, T1For column vector conversion, m and n are the numbers of the A and B discourse elements, respectively.
As each fuzzy control rule table shows, there are 49 such fuzzy rules, and the total fuzzy relation R of the whole fuzzy control table can be expressed as 49 fuzzy relations RiThe sum operation of (1), namely:
Figure GDA0002643204660000123
knowing fuzzy subsets E and EC of input linguistic variables, the PID parameter adjustment quantity delta K of output quantity can be calculated by the inference synthesis ruleP、△KIAnd Δ KDWith the parameter Δ KPFor example, the following steps are carried out:
Figure GDA0002643204660000124
and 3, fuzzy judgment of output quantity. The output quantity of the fuzzy controller synthesized by fuzzy inference is a fuzzy set, and cannot be used as a control quantity applied to an actuator, and must be converted to find an accurate control quantity. Fuzzy judgment adopted by the systemThe solution is a weighted average. According to the fuzzy control rule table above, for the input deviation e and the deviation change rate ecThe output of the response can be obtained through reasoning, and the membership degree of the output variable is firstly calculated as follows: corresponding output variable delta KPThe first adjusted fuzzy rule membership is:
up1＝uNB(E)×uNB(EC)
and in the formula, the minimum value of the corresponding membership degrees of the room temperature deviation E and the deviation change rate EC is taken, namely:
up1＝min(uNB(E),uNB(EC))
the output variable Delta K can be obtained by the similar reasoningPOther membership degrees in the fuzzy control rule table are used for solving the corresponding delta K at a certain sampling moment by using a weighted average methodPThe values of (A) are:
Figure GDA0002643204660000131
u in the formulapjIs expressed by a value of Δ K obtained by expressing membership degrees corresponding to different combinations of the deviation E and the deviation change rate ECPThe membership degree of the PID parameter can be obtained by the same principle to obtain other two adjustment quantities delta K of the PID parameterIAnd Δ KD。
Further, the control quantity output by the fuzzy PID controller is determined according to the following formula:
Figure GDA0002643204660000132
where u (k) is a computer output value at the k-th sampling time, k is a sampling number, k is 0,1,2, E (k) is an offset value input at the k-th sampling time, and E (k-1) is an offset value input at the k-1-th sampling time.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (9)

1.一种电采暖系统，其特征在于，所述系统包括：电蓄热锅炉单元、热泵主机单元、水循环单元、控制单元、第一换热单元和第二换热单元，所述的电蓄热锅炉单元通过第一换热单元的内循环管与供热区连接的所述水循环单元连接，所述热泵主机单元通过第二换热单元的内循环管与供热区连接的所述水循环单元连接，所述控制单元分别与所述电蓄热锅炉单元、热泵主机单元及水循环单元连接；1. An electric heating system, characterized in that the system comprises: an electric heat storage boiler unit, a heat pump host unit, a water circulation unit, a control unit, a first heat exchange unit and a second heat exchange unit, the electric storage The heat boiler unit is connected to the water circulation unit connected to the heat supply area through the inner circulation pipe of the first heat exchange unit, and the heat pump host unit is connected to the water circulation unit of the heat supply area through the inner circulation pipe of the second heat exchange unit connected, the control unit is respectively connected with the electric heat storage boiler unit, the heat pump host unit and the water circulation unit; 所述电蓄热锅炉单元，用于在用电或电价低谷期蓄热，并利用蓄热的热能供暖；The electric heat storage boiler unit is used to store heat during the period of electricity consumption or low electricity price, and use the stored thermal energy for heating; 所述热泵主机单元，用于利用低位热源的热能供暖；The heat pump host unit is used for heating by utilizing the thermal energy of the low-level heat source; 所述水循环单元，用于分别将所述电蓄热锅炉单元和所述热泵主机单元提供的热能通过循环流量传递至供暖目标；The water circulation unit is used to transfer the thermal energy provided by the electric heat storage boiler unit and the heat pump host unit to the heating target through circulation flow respectively; 所述控制单元，用于根据室内温度，调节所述水循环单元对供暖区传递的供暖热量；The control unit is configured to adjust the heating heat transferred by the water circulation unit to the heating area according to the indoor temperature; 所述控制单元，包括：室外温度传感器、室内温度传感器、供水温度传感器、回水温度传感器和控制器；The control unit includes: an outdoor temperature sensor, an indoor temperature sensor, a water supply temperature sensor, a return water temperature sensor and a controller; 所述供水温度传感器安装于水循环单元的补水阀与电动三通阀之间，所述回水温度传感器安装于水循环单元的排气阀与室内供暖末端之间；The water supply temperature sensor is installed between the water replenishment valve and the electric three-way valve of the water circulation unit, and the return water temperature sensor is installed between the exhaust valve of the water circulation unit and the indoor heating terminal; 所述控制器分别与电蓄热锅炉单元的加热丝、电蓄热锅炉单元的可控阀门、电蓄热锅炉单元的变频风机、热泵主机单元的压缩机、水循环单元的电动三通阀、水循环单元的集热器循环水泵、热泵主机单元的膨胀阀连接。The controller is respectively connected with the heating wire of the electric heat storage boiler unit, the controllable valve of the electric heat storage boiler unit, the variable frequency fan of the electric heat storage boiler unit, the compressor of the heat pump host unit, the electric three-way valve of the water circulation unit, and the water circulation unit. The collector circulating water pump of the unit and the expansion valve of the heat pump host unit are connected. 2.如权利要求1所述的系统，其特征在于，所述系统进一步包括：气候补偿器，所述气候补偿器分别与所述电蓄热锅炉单元、热泵主机单元及水循环单元连接，用于根据室外温度调节所述电蓄热锅炉单元和热泵主机单元对供暖区的供暖热量。2. The system according to claim 1, wherein the system further comprises: a climate compensator, the climate compensator is respectively connected with the electric thermal storage boiler unit, the heat pump host unit and the water circulation unit, for The heating heat of the electric heat storage boiler unit and the heat pump host unit to the heating area is adjusted according to the outdoor temperature. 3.如权利要求1所述的系统，其特征在于，所述热泵主机单元包括：地埋换热器、膨胀阀、储液罐、气液分离器和压缩机，所述气液分离器和所述压缩机依次设于从地埋换热器出口至所述第二换热单元的外循环管的入口管路上，所述储液罐和所述膨胀阀依次设于从所述第二换热单元的外循环管出口至地埋换热器的入口管路上。3. The system of claim 1, wherein the heat pump host unit comprises: a buried heat exchanger, an expansion valve, a liquid storage tank, a gas-liquid separator and a compressor, the gas-liquid separator and The compressor is sequentially arranged on the inlet pipeline from the outlet of the buried heat exchanger to the outer circulation pipe of the second heat exchange unit, and the liquid storage tank and the expansion valve are arranged in sequence from the second heat exchanger. The outlet of the external circulation pipe of the heat unit is connected to the inlet pipe of the buried heat exchanger. 4.如权利要求1所述的系统，其特征在于，所述电蓄热锅炉单元包括电蓄热锅炉，和连接所述电蓄热锅炉与所述第一换热单元的外循环管路。4. The system of claim 1, wherein the electric heat storage boiler unit comprises an electric heat storage boiler, and an external circulation pipeline connecting the electric heat storage boiler and the first heat exchange unit. 5.如权利要求4所述的系统，其特征在于，所述电蓄热锅炉包括：蓄热砖、加热丝、热风通道、可控阀门、变频风机和炉温传感器，其中，所述蓄热砖中镶嵌所述加热丝，所述炉温传感器镶嵌在蓄热砖中，与加热丝的方向垂直所述蓄热砖的层与层之间形成所述热风通道，所述热风通道两端与所述可控阀门相连，所述可控阀门与所述变频风机连接，所述变频风机与所述第一换热单元连接；5. The system according to claim 4, wherein the electric thermal storage boiler comprises: thermal storage bricks, heating wires, hot air passages, controllable valves, variable frequency fans and furnace temperature sensors, wherein the thermal storage The heating wire is embedded in the brick, and the furnace temperature sensor is embedded in the heat storage brick, and the hot air channel is formed between the layers of the heat storage brick, which is perpendicular to the direction of the heating wire. the controllable valve is connected, the controllable valve is connected with the variable frequency fan, and the variable frequency fan is connected with the first heat exchange unit; 所述蓄热砖，用于存储热能；所述加热丝，用于将电能转换为热能；所述热风通道，用于传递热能；所述可控阀门，用于控制所述热风通道与所述变频风机间的连接关系；所述变频风机，用于推动热能在所述热风通道中流动；所述炉温传感器，用于量测电蓄热锅炉内部温度。The heat storage brick is used to store heat energy; the heating wire is used to convert electrical energy into heat energy; the hot air channel is used to transfer heat energy; the controllable valve is used to control the relationship between the hot air channel and the The connection relationship between the frequency conversion fans; the frequency conversion fans are used to push heat energy to flow in the hot air channel; the furnace temperature sensor is used to measure the internal temperature of the electric heat storage boiler. 6.如权利要求1所述的系统，其特征在于，所述水循环单元包括：于供热区一侧并联设置的两条内循环管路；6. The system according to claim 1, wherein the water circulation unit comprises: two inner circulation pipelines arranged in parallel on one side of the heating area; 所述并联设置的内循环管路中的一条内循环管路包括：从所述供热区的出口至所述第一换热单元入口间的设有三通阀和补水阀的第一内循环管段，从所述第一换热单元出口至所述第二换热单元入口间的设有流量监测仪、第一电磁阀和集热器循环水泵的第二内循环管段，和从所述第二换热单元另一出口至所述供热区的出口处间的设有排气阀的第三内循环管段；One of the inner circulation pipes arranged in parallel includes: a first inner circulation pipe section provided with a three-way valve and a water replenishing valve from the outlet of the heating area to the inlet of the first heat exchange unit , from the outlet of the first heat exchange unit to the inlet of the second heat exchange unit is provided with a flow monitor, a first solenoid valve and a second inner circulation pipe section of the collector circulating water pump, and from the second heat exchange unit a third inner circulation pipe section provided with an exhaust valve between another outlet of the heat exchange unit and the outlet of the heat supply area; 所述并联设置的内循环管路中的另一条内循环管路，设有与所述第三内循环管段连通的三通阀，所述第一内循环管段设有与所述另一条内循环管路相同的三通阀。The other inner circulation pipeline in the inner circulation pipelines arranged in parallel is provided with a three-way valve communicating with the third inner circulation pipe section, and the first inner circulation pipe section is provided with the other inner circulation pipeline. Three-way valve with the same line. 7.如权利要求2所述的系统，其特征在于，所述气候补偿器分别与所述控制单元的室外温度传感器、室内温度传感器、供水温度传感器、回水温度传感器、水循环单元的流量检测仪、热泵主机单元的膨胀阀、电蓄热锅炉单元的可控阀门及水循环单元的第一电磁阀连接；7. The system according to claim 2, wherein the climate compensator is respectively connected with an outdoor temperature sensor, an indoor temperature sensor, a water supply temperature sensor, a return water temperature sensor, and a flow detector of the water circulation unit of the control unit. , The expansion valve of the heat pump host unit, the controllable valve of the electric heat storage boiler unit and the first solenoid valve of the water circulation unit are connected; 所述气候补偿器用于根据室外温度传感器的数值确定理论供水温度，采集供水温度传感器的实际供水温度，进行理论供水温度和实际供水温度的比较，获取供水温度的偏差和偏差变化率，作为所述气候补偿器内部模糊PID控制器的输入，并利用所述气候补偿器内部模糊PID控制器获取第一控制量；The climate compensator is used to determine the theoretical water supply temperature according to the value of the outdoor temperature sensor, collect the actual water supply temperature of the water supply temperature sensor, compare the theoretical water supply temperature and the actual water supply temperature, and obtain the deviation and deviation change rate of the water supply temperature, as the The input of the fuzzy PID controller inside the climate compensator, and the first control variable is obtained by using the fuzzy PID controller inside the climate compensator; 气候补偿器内部模糊PID控制器根据所述第一控制量，调节电蓄热锅炉单元的可控阀门、热泵主机单元的膨胀阀和热泵主机单元的第一电磁阀的开度。The fuzzy PID controller inside the climate compensator adjusts the opening of the controllable valve of the electric thermal storage boiler unit, the expansion valve of the heat pump host unit and the first solenoid valve of the heat pump host unit according to the first control quantity. 8.如权利要求1所述的系统，其特征在于，所述控制器用于采集室内温度传感器的室内温度值，将室内温度值和设定的室内温度阈值进行比较，获取室温偏差和室温偏差变化率，作为控制器内部模糊PID控制器的输入，并利用控制器内部模糊PID控制器获取第一控制量；8. The system of claim 1, wherein the controller is used to collect the indoor temperature value of the indoor temperature sensor, compare the indoor temperature value with the set indoor temperature threshold, and obtain room temperature deviation and room temperature deviation change rate, as the input of the fuzzy PID controller inside the controller, and use the fuzzy PID controller inside the controller to obtain the first control variable; 控制器内部模糊PID控制器利用所述第一控制量，调节水循环单元的电动三通阀的开度。The fuzzy PID controller inside the controller uses the first control amount to adjust the opening of the electric three-way valve of the water circulation unit. 9.一种如权利要求1-8任一项所述电采暖系统的控制方法，其特征在于，所述方法包括：9. A control method for an electric heating system according to any one of claims 1-8, wherein the method comprises: 利用电蓄热锅炉单元，在用电或电价低谷期蓄热，并利用蓄热的热能供暖；Utilize electric thermal storage boiler units to store heat during periods of low electricity consumption or electricity prices, and use the stored thermal energy for heating; 利用热泵主机单元将低位热源转换为高位热源，并利用低位热源的热能供暖；Use the heat pump host unit to convert the low-level heat source into a high-level heat source, and use the heat energy of the low-level heat source for heating; 控制水循环单元分别将电蓄热锅炉单元和热泵主机单元提供的热能通过循环流量传递至供暖目标；Control the water circulation unit to transfer the heat energy provided by the electric heat storage boiler unit and the heat pump host unit to the heating target through the circulation flow respectively; 控制器采集室内温度传感器的室内温度值，将室内温度值和设定的室内温度进行比较，获取室温偏差和室温偏差变化率，作为控制器内部模糊PID控制器的输入，并利用控制器内部模糊PID控制器获取第一控制量；The controller collects the indoor temperature value of the indoor temperature sensor, compares the indoor temperature value with the set indoor temperature, and obtains the room temperature deviation and the change rate of the room temperature deviation, which are used as the input of the fuzzy PID controller inside the controller, and use the fuzzy PID controller inside the controller. The PID controller obtains the first control variable; 控制器内部模糊PID控制器利用所述第一控制量，调节水循环单元的电动三通阀的开度；The fuzzy PID controller inside the controller uses the first control amount to adjust the opening of the electric three-way valve of the water circulation unit; 气候补偿器根据室外温度传感器的数值确定供水温度，采集供水温度传感器的数值，进行理论供水温度和实际供水温度的比较，获取供水温度的偏差和偏差变化率，作为所述气候补偿器内部模糊PID控制器的输入，并利用所述气候补偿器内部模糊PID控制器获取第一控制量；The climate compensator determines the water supply temperature according to the value of the outdoor temperature sensor, collects the value of the water supply temperature sensor, compares the theoretical water supply temperature and the actual water supply temperature, and obtains the deviation and deviation change rate of the water supply temperature as the fuzzy PID inside the climate compensator. the input of the controller, and obtain the first control quantity by using the fuzzy PID controller inside the climate compensator; 气候补偿器内部模糊PID控制器根据所述第一控制量，调节电蓄热锅炉单元的可控阀门、热泵主机单元的膨胀阀和热泵主机单元的第一电磁阀的开度。The fuzzy PID controller inside the climate compensator adjusts the opening of the controllable valve of the electric thermal storage boiler unit, the expansion valve of the heat pump host unit and the first solenoid valve of the heat pump host unit according to the first control quantity.
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