CN112202390A - Photo-thermal photovoltaic complementary cooperative power generation system and operation method - Google Patents
Photo-thermal photovoltaic complementary cooperative power generation system and operation method Download PDFInfo
- Publication number
- CN112202390A CN112202390A CN202010790431.8A CN202010790431A CN112202390A CN 112202390 A CN112202390 A CN 112202390A CN 202010790431 A CN202010790431 A CN 202010790431A CN 112202390 A CN112202390 A CN 112202390A
- Authority
- CN
- China
- Prior art keywords
- power
- photovoltaic
- photo
- thermal
- heat storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
-
- H02J2101/20—
-
- H02J2101/22—
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/60—Thermal-PV hybrids
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
本发明公开了一种光热光伏互补协同发电系统及运行方法，包括光伏电站、光热电站、电加热系统、汇流系统、控制系统及电网，光伏电站包括光伏阵列及逆变器，光热电站包括光热集热系统、储热系统及发电系统；光伏阵列的输出端经逆变器与电加热系统的电源接口及汇流系统相连接，光热集热系统与储热系统相连接，储热系统与发电系统相连接，发电系统的输出端与汇流系统相连接，控制系统与汇流系统的控制端相连接，汇流系统的输出端与电网相连接，该系统及运行方法能够实现光伏和光热的互补协同发电，且自调节能力较强。
The invention discloses a solar-thermal photovoltaic complementary synergistic power generation system and an operation method, including a photovoltaic power station, a solar-thermal power station, an electric heating system, a confluence system, a control system and a power grid. The photovoltaic power station includes a photovoltaic array and an inverter. It includes a solar thermal collection system, a heat storage system and a power generation system; the output end of the photovoltaic array is connected to the power interface and the confluence system of the electric heating system through the inverter, and the solar thermal collector system is connected to the heat storage system, and the heat storage system The system is connected with the power generation system, the output end of the power generation system is connected with the confluence system, the control system is connected with the control end of the confluence system, the output end of the confluence system is connected with the power grid, the system and the operation method can realize photovoltaic and solar thermal Complementary synergistic power generation with strong self-regulation ability.
Description
Technical Field
The invention belongs to the technical field of solar power generation, and relates to a photo-thermal photovoltaic complementary cooperative power generation system and an operation method.
Background
With the increasing proportion of renewable energy installation and generating capacity in the total electricity installation and generating capacity, about 150 countries around the world set specific targets for renewable energy power generation, mainly focusing on wind power generation and solar power generation. The method aims to achieve the aims that the non-fossil energy power generation installed proportion can reach 50% in the last stage of fourteen-five in China, the greenhouse gas emission (possibly) reaches a peak value, and then the emission is reduced year by year, improve the quality of wind power and solar energy electric energy, and improve the consumption proportion of the wind power and solar energy power generation, and is an important problem to be solved at present.
The solar power generation mainly comprises two technical forms of photovoltaic and photo-thermal power generation, the photovoltaic power generation is weaker in self-adjusting capacity, a certain proportion of light abandoning rate is usually generated during consumption, related supporting documents of photovoltaic power distribution and energy storage are provided in part of areas at present, a pure photovoltaic power station can realize the on-line at a flat price or below the flat price, but the pure photovoltaic energy storage mode is difficult to be economical at present due to the higher cost of a battery energy storage system. The photo-thermal power station has strong adjusting capacity due to the arrangement of the heat storage system, and the adjusting range of the photo-thermal power station is approximately from 0% to 100%. If the photovoltaic system is combined with the photo-thermal system, the photo-thermal regulating capacity can be used systematically to stabilize the electric energy fluctuation of the photovoltaic system, or off-peak power generation can be realized, and the electric energy of a low-cost photovoltaic power station can be economically used to reduce the power generation cost of the photo-thermal power station, or (part of) replace the power consumption of the photo-thermal power station. Through with photovoltaic and light and heat system complementary cooperation electricity generation, can maximize exert both regulating power, realize the profit maximize.
At present, many scholars and enterprises have studied photovoltaic photo-thermal complementary power generation, and the conditions of main related research results are as follows:
chinese patent CN203984349U proposes a fast-reforming photovoltaic and photo-thermal integrated distributed system, chinese patent CN107702194A proposes a photovoltaic and photo-thermal power generation and heating system and control method, and chinese patent CN205754215U proposes a photovoltaic and photo-thermal integrated system. The three patents realize photovoltaic and photo-thermal common power generation through a concentrating photovoltaic technology, are combined with a component-level photovoltaic and photo-thermal power generation technology, still have photovoltaic power generation as a main technical route, and are completely different from the photo-thermal turbine power generation system in the patent.
Chinese patent CN209692366U proposes a solar photovoltaic and photo-thermal complementary power generation system for power isolated network, which realizes the complementary power generation of photovoltaic photo-thermal power station by a complementary control system, in the system, the photovoltaic and photo-thermal independently operate except for the meteorological prediction system, which is different from the complementary cooperative power generation system described in this patent.
Chinese patent CN110429667A proposes a capacity allocation method for a photovoltaic-thermal photovoltaic bundled power generation system based on cuckoo search, which can realize minimum standard deviation of output of the photovoltaic-thermal bundled power generation system, in the system, photovoltaic and thermal independently operate, based on output prediction of the photovoltaic and thermal, the minimum target of standard deviation of output is used to optimize output allocation of the photovoltaic and thermal bundled power generation system, the optimization process does not consider electricity price factor, and the maximum income of a power station is not optimized, which is different from the complementary cooperative power generation system and the operation method described in the present patent.
Chinese patent CN202872690U proposes a device for combining a light-permeable photovoltaic cell with photo-thermal power generation and comprehensive utilization, and utilizes a high-transmittance photovoltaic cell and a light-gathering device to realize the photo-thermal comprehensive utilization.
Chinese patent CN105007038A proposes a photovoltaic auxiliary power generation system for photo-thermal power station, which realizes photovoltaic auxiliary photo-thermal power generation by adding a photovoltaic cell panel above a fresnel secondary reflecting surface, wherein the photovoltaic and photo-thermal independently operate in the system, and the system structure has no complementary synergistic function.
Chinese patent CN106330093A proposes a photovoltaic and photo-thermal integrated power generation system, which heats water through photovoltaic power generation, and then introduces water into photo-thermal heat collection system to realize hybrid power generation, besides, the photovoltaic and photo-thermal system operates independently, in this system, water is squeezed into the photo-thermal heat collection system above 1000 ℃, the feasibility is poor in engineering, a large amount of water with unbalanced temperature can cause the photo-thermal heat collection system to be heated unevenly, and the service life of the equipment is reduced. In addition, when the photovoltaic power generation system and the photo-thermal power generation system operate independently, the respective internet power cannot be optimized comprehensively according to the dispatching requirement of the power grid.
Chinese patent CN205051623U proposes a photovoltaic and photo-thermal integrated power generation system, which installs photovoltaic module and photo-thermal module on a support simultaneously to realize integrated power generation, wherein photovoltaic photo-thermal still operates independently in energy aspect in this system, only the heat collection module is on the same support, and actually still generates power independently, and does not have the function of optimizing respective internet power according to the power grid dispatching requirement.
In summary, at present, relatively few researches on photo-thermal photovoltaic complementary power generation exist, and mainly stay in a theoretical stage, related achievements cannot meet the requirements of power grid dispatching on system flexibility during solar power generation and absorption, and a complementary cooperative power generation system and an operation method which give full play to respective characteristics of photo-thermal photovoltaic and have high self-regulation capability need to be designed, which are not mentioned in the existing patent results.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a photo-thermal and photovoltaic complementary cooperative power generation system and an operation method thereof.
In order to achieve the purpose, the photo-thermal and photovoltaic complementary cooperative power generation system comprises a photovoltaic power station, a photo-thermal power station, an electric heating system, a confluence system, a control system and a power grid, wherein the photovoltaic power station comprises a photovoltaic array and an inverter, and the photo-thermal power station comprises a photo-thermal heat collection system, a heat storage system and a power generation system;
the output end of the photovoltaic array is connected with a power interface of the electric heating system and the confluence system through the inverter, the photo-thermal heat collection system is connected with the heat storage system, the heat storage system is connected with the power generation system, the output end of the power generation system is connected with the confluence system, the control system is connected with the control end of the confluence system, and the output end of the confluence system is connected with the power grid.
The heat storage system comprises a high-temperature heat storage system and a low-temperature heat storage system, wherein an outlet of the high-temperature heat storage system is communicated with an inlet of the power generation system, an outlet of the power generation system is communicated with an inlet of the low-temperature heat storage system, an outlet of the low-temperature heat storage system is communicated with an inlet of the photo-thermal heat collection system, an outlet of the photo-thermal heat collection system is communicated with an inlet of the high-temperature heat storage system, a heater is arranged in the high-temperature heat storage system, and the electric heating system is.
The power generation system comprises a heat exchanger, a steam turbine and a generator, wherein the heat release side of the heat exchanger is communicated with the heat storage system, the heat absorption side inlet of the heat exchanger is communicated with the outlet of the steam turbine, the heat absorption side outlet of the heat exchanger is communicated with the inlet of the steam turbine, and the output shaft of the steam turbine is connected with the driving shaft of the generator.
The convergence system is provided with a photovoltaic electric energy meter and a photo-thermal electric energy meter, the photo-thermal electric energy meter is connected with the power generation system, and the photovoltaic electric energy meter is connected with the inverter.
An operation method of a photo-thermal photovoltaic complementary cooperative power generation system comprises a confluence grid-connected cooperative operation mode and a photo-thermal photovoltaic heat storage cooperative operation mode;
the specific operation process in the confluence grid-connected cooperative operation mode is as follows:
1a) the control system obtains a power dispatching instruction, detects the photo-thermal power generation power of the current photo-thermal power station and the photovoltaic power generation power of the photovoltaic power station, simultaneously predicts the power generation power of the photo-thermal power station and the photovoltaic power generation power of the photovoltaic power station in a future preset time period, and ensures that the integral grid-connected power of the power station meets the power dispatching instruction requirement, namely the relative deviation of the integral grid-connected power of the power station is smaller than the allowable deviation delta of a power gridPI.e. by
Wherein G isplantFor the power of the plant as a whole, GcspFor grid-connected power of photothermal power stations, GpvFor grid-connected power of photovoltaic plants, GgridFor power dispatching commands, deltaPThe relative deviation between the integral grid-connected power of the power station and the power dispatching instruction is obtained;
2b) based on historical data of generated power and time-of-use electricity price, the optimization algorithm is used for optimizing the time-of-use grid-connected power of the photo-thermal power station and the photovoltaic power station, so that the one-day overall income I of the power station is maximized.
Wherein n is the division of a day into n time segments, Gcsp·tAnd Gpv·tThe photothermal grid-connected power and the photovoltaic grid-connected power in the t-th time period in a day, Pcsp·tAnd Ppv·tThe solar heat electrovalence and the photovoltaic electrovalence in the t time period in one day respectively, A is deltaPThe requirement of the power grid permission deviation is not met, and the assessment cost of the power market is received;
the specific operation process of the photo-thermal photovoltaic heat storage coordination operation mode comprises the following steps:
when the generating power of the photovoltaic power station is higher than the optimized required photovoltaic grid-connected power, the rest electric energy is used for heating the energy storage medium in the heat storage system by using the electric heating system, when the generating power of the photovoltaic power station is less than or equal to the optimized required photovoltaic grid-connected power, the electric heating system is stopped, and the specific process is as follows:
heating power G of electric heating systemhAutomatically adjusted according to the photovoltaic grid-connected power and photovoltaic generated power conditions, i.e.
Wherein G ishFor electric heating power, GiThe power is the outlet electric power of the photovoltaic power station inverter;
in the process that the electric heating system heats the heat storage medium in the heat storage system, the flow of the heat storage medium entering the heat storage system is adjusted in real time, and the temperature of the heat storage medium output from the photo-thermal heat collection system to the heat storage system is adjusted at the same time, so that the temperature of the heat storage medium output from the photo-thermal heat collection system to the heat storage system after being heated by the electric heating system is the preset temperature, namely the preset temperature
Wherein c is the specific heat of the heat storage medium,
flow rate of heat storage medium, T, for output of photothermal collection systemsetTo a predetermined temperature, ToutThe temperature of the heat storage medium output by the photo-thermal heat collection system is represented by eta, and the comprehensive efficiency of the electric heating system and the heating process is represented by eta.
The invention has the following beneficial effects:
when the photo-thermal and photovoltaic complementary cooperative power generation system and the operation method are specifically operated, the power station can optimize the photo-thermal power and the photovoltaic power according to the power scheduling instruction of the power grid and by combining the current photo-thermal power generation power and the photovoltaic power generation power of the power station and the prediction situation of the photo-thermal power generation power and the photovoltaic power generation power in the future time period, so that the integral grid-connected power of the power station meets the power scheduling requirement, the assessment caused by larger power generation power and scheduling deviation is avoided, the profit of the power station is maximized, in addition, the electric quantity exceeding the photovoltaic power station is stored in the heat storage system through the electric heating system, the photo-thermal power station and the photovoltaic power station can be deeply fused, an energy storage system which is put into the photovoltaic power station for stable operation is saved, the economy and the flexibility of the integral power station are further, the self-adjusting capability is stronger.
Drawings
FIG. 1 is a schematic diagram of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
The solar heat collection system comprises a solar heat collection system 1, a heat storage system 2, a power generation system 3, a confluence system 4, a photovoltaic array 5, an inverter 6, a control system 7, a power grid 8, an electric heating system 9, a high-temperature heat storage system 201, a low-temperature heat storage system 202, a heat exchanger 301, a steam turbine 302, a power generator 303, a solar heat electric energy meter 401 and a photovoltaic electric energy meter 402.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the photo-thermal and photovoltaic complementary cooperative power generation system includes a photovoltaic power station, a photo-thermal power station, an electric heating system 9, a confluence system 4, a control system 7 and a power grid 8, the photovoltaic power station includes a photovoltaic array 5 and an inverter 6, and the photo-thermal power station includes a photo-thermal heat collection system 1, a heat storage system 2 and a power generation system 3; the output end of the photovoltaic array 5 is connected with a power interface of an electric heating system 9 and a confluence system 4 through an inverter 6, the photo-thermal heat collection system 1 is connected with the heat storage system 2, the heat storage system 2 is connected with the power generation system 3, the output end of the power generation system 3 is connected with the confluence system 4, the control system 7 is connected with the control end of the confluence system 4, and the output end of the confluence system 4 is connected with a power grid 8.
The heat storage system 2 comprises a high-temperature heat storage system 201 and a low-temperature heat storage system 202, wherein an outlet of the high-temperature heat storage system 201 is communicated with an inlet of the power generation system 3, an outlet of the power generation system 3 is communicated with an inlet of the low-temperature heat storage system 202, an outlet of the low-temperature heat storage system 202 is communicated with an inlet of the photo-thermal heat collection system 1, an outlet of the photo-thermal heat collection system 1 is communicated with an inlet of the high-temperature heat storage system 201, a heater is arranged in the high-temperature heat storage system 201, and the electric heating system 9 is.
The power generation system 3 comprises a heat exchanger 301, a steam turbine 302 and a generator 303, wherein the heat release side of the heat exchanger 301 is communicated with the heat storage system 2, the heat absorption side inlet of the heat exchanger 301 is communicated with the outlet of the steam turbine 302, the heat absorption side outlet of the heat exchanger 301 is communicated with the inlet of the steam turbine 302, and the output shaft of the steam turbine 302 is connected with the driving shaft of the generator 303.
The confluence system 4 is provided with a photovoltaic electric energy meter 402 and a photo-thermal electric energy meter 401, the photo-thermal electric energy meter 401 is connected with the power generation system 3, and the photovoltaic electric energy meter 402 is connected with the inverter 6.
The operation method of the photo-thermal photovoltaic complementary cooperative power generation system comprises a confluence grid-connected cooperative operation mode and a photo-thermal photovoltaic heat storage cooperative operation mode;
the specific operation process in the confluence grid-connected cooperative operation mode is as follows:
1a) the control system 7 obtains a power dispatching instruction, detects the photo-thermal power generation power of the current photo-thermal power station and the photovoltaic power generation power of the photovoltaic power station, simultaneously predicts the power generation power of the photo-thermal power station and the photovoltaic power generation power of the photovoltaic power station in a future preset time period, and ensures that the integral grid-connected power of the power station meets the power dispatching instruction requirement, namely the relative deviation of the integral grid-connected power of the power station is smaller than the allowable deviation delta of the power grid 8PI.e. by
Wherein G isplantFor the power of the plant as a whole, GcspFor grid-connected power of photothermal power stations, GpvFor grid-connected power of photovoltaic plants, GgridFor power dispatching commands, deltaPIntegrating power and electricity into a power stationForce scheduling command relative deviation;
2b) based on historical data of generated power and time-of-use electricity price, the optimization algorithm is used for optimizing the time-of-use grid-connected power of the photo-thermal power station and the photovoltaic power station, so that the one-day overall income I of the power station is maximized.
Wherein n is the division of a day into n time segments, Gcsp·tAnd Gpv·tThe photothermal grid-connected power and the photovoltaic grid-connected power in the t-th time period in a day, Pcsp·tAnd Ppv·tThe solar heat electrovalence and the photovoltaic electrovalence in the t time period in one day respectively, A is deltaPThe requirement of the power grid 8 on allowable deviation is not met, and the assessment cost of the power market is received;
the specific operation process of the photo-thermal photovoltaic heat storage coordination operation mode comprises the following steps:
when the generated power of the photovoltaic power station is higher than the optimized required photovoltaic grid-connected power, the rest electric energy is used for heating the energy storage medium in the heat storage system 2 by using the electric heating system 9, when the generated power of the photovoltaic power station is smaller than or equal to the optimized required photovoltaic grid-connected power, the electric heating system 9 is stopped, and the specific process is as follows:
heating power G of the electric heating system 9hAutomatically adjusted according to the photovoltaic grid-connected power and photovoltaic generated power conditions, i.e.
Wherein G ishFor electric heating power, GiThe electric power is output from the photovoltaic power station inverter 6;
in the process that the electric heating system 9 heats the heat storage medium in the heat storage system 2, the flow of the heat storage medium entering the heat storage system 2 is adjusted in real time, and the temperature of the heat storage medium output from the photo-thermal heat collection system 1 to the heat storage system 2 is adjusted at the same time, so that the temperature of the heat storage medium output from the photo-thermal heat collection system 1 to the heat storage system 2 after being heated by the electric heating system 9 is the preset temperature, namely the temperature is the preset temperature
Wherein c is the specific heat of the heat storage medium,
flow rate of heat storage medium T outputted from photothermal heat collecting system 1setTo a predetermined temperature, ToutThe temperature of the heat storage medium output by the photo-thermal heat collection system 1, and eta is the comprehensive efficiency of the electric heating system 9 and the heating process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention.
Claims (5)
1. The photo-thermal photovoltaic complementary cooperative power generation system is characterized by comprising a photovoltaic power station, a photo-thermal power station, an electric heating system (9), a confluence system (4), a control system (7) and a power grid (8), wherein the photovoltaic power station comprises a photovoltaic array (5) and an inverter (6), and the photo-thermal power station comprises a photo-thermal heat collection system (1), a heat storage system (2) and a power generation system (3);
the output end of the photovoltaic array (5) is connected with a power interface of an electric heating system (9) and a confluence system (4) through an inverter (6), the photothermal heat collection system (1) is connected with the heat storage system (2), the heat storage system (2) is connected with the power generation system (3), the output end of the power generation system (3) is connected with the confluence system (4), the control system (7) is connected with the control end of the confluence system (4), and the output end of the confluence system (4) is connected with a power grid (8).
2. The photo-thermal photovoltaic complementary cooperative power generation system according to claim 1, wherein the heat storage system (2) comprises a high-temperature heat storage system (201) and a low-temperature heat storage system (202), an outlet of the high-temperature heat storage system (201) is communicated with an inlet of the power generation system (3), an outlet of the power generation system (3) is communicated with an inlet of the low-temperature heat storage system (202), an outlet of the low-temperature heat storage system (202) is communicated with an inlet of the photo-thermal heat collection system (1), an outlet of the photo-thermal heat collection system (1) is communicated with an inlet of the high-temperature heat storage system (201), a heater is arranged in the high-temperature heat storage system (201), and an electric heating system (9) is connected with the heater.
3. The photothermal and photovoltaic complementation synergy power generation system according to claim 1, wherein the power generation system (3) comprises a heat exchanger (301), a steam turbine (302) and a power generator (303), wherein the heat release side of the heat exchanger (301) is communicated with the heat storage system (2), the heat absorption side inlet of the heat exchanger (301) is communicated with the outlet of the steam turbine (302), the heat absorption side outlet of the heat exchanger (301) is communicated with the inlet of the steam turbine (302), and the output shaft of the steam turbine (302) is connected with the driving shaft of the power generator (303).
4. The photo-thermal photovoltaic complementary cooperative power generation system according to claim 1, wherein the confluence system (4) is provided with a photovoltaic electric energy meter (402) and a photo-thermal electric energy meter (401), the photo-thermal electric energy meter (401) is connected with the power generation system (3), and the photovoltaic electric energy meter (402) is connected with the inverter (6).
5. An operation method of the photo-thermal photovoltaic complementary cooperative power generation system according to claim 1, comprising a confluence grid-connected cooperative operation mode and a photo-thermal photovoltaic heat storage cooperative operation mode;
the specific operation process in the confluence grid-connected cooperative operation mode is as follows:
1a) the control system (7) obtains a power dispatching instruction, detects the photo-thermal power generation power of the current photo-thermal power station and the photovoltaic power generation power of the photovoltaic power station, simultaneously predicts the power generation power of the photo-thermal power station and the photovoltaic power generation power of the photovoltaic power station in a future preset time period, and ensures that the integral grid-connected power of the power station meets the power dispatching instruction requirement, namely the relative deviation of the integral grid-connected power of the power station is smaller than the allowable deviation delta of a power grid (8)PI.e. by
Wherein G isplantFor the power of the plant as a whole, GcspFor grid-connected power of photothermal power stations, GpvFor grid-connected power of photovoltaic plants, GgridFor power dispatching commands, deltaPThe relative deviation between the integral grid-connected power of the power station and the power dispatching instruction is obtained;
2b) based on the historical data of the generated power and the time-of-use electricity price, the time-of-use grid-connected power of the photo-thermal power station and the photovoltaic power station is optimized by using an optimization algorithm, so that the one-day overall income I of the power station is maximized.
Wherein n is the division of a day into n time segments, Gcsp·tAnd Gpv·tThe photothermal grid-connected power and the photovoltaic grid-connected power in the t-th time period in a day, Pcsp·tAnd Ppv·tThe solar heat and photovoltaic electrovalence in the t time period in the day respectively, A is deltaPThe requirement of allowable deviation of a power grid (8) is not met, and the assessment cost of the power market is received;
the specific operation process of the photo-thermal photovoltaic heat storage coordination operation mode comprises the following steps:
when the generated power of the photovoltaic power station is higher than the optimized required photovoltaic grid-connected power, the residual electric energy is used for heating the energy storage medium in the heat storage system (2) by using the electric heating system (9), when the generated power of the photovoltaic power station is less than or equal to the optimized required photovoltaic grid-connected power, the electric heating system (9) is stopped, and the specific process is as follows:
heating power G of the electric heating system (9)hAutomatically adjusted according to the photovoltaic grid-connected power and photovoltaic generated power conditions, i.e.
Wherein G ishFor electric heating power, GiThe electric power is output from a photovoltaic power station inverter (6);
in the process that the electric heating system (9) heats the heat storage medium in the heat storage system (2), the flow of the heat storage medium entering the heat storage system (2) is adjusted in real time, and the temperature of the heat storage medium output to the heat storage system (2) by the photo-thermal heat collection system (1) is adjusted at the same time, so that the temperature of the heat storage medium output to the heat storage system (2) by the photo-thermal heat collection system (1) after being heated by the electric heating system (9) is preset, namely the preset temperature is the temperature
Wherein c is the specific heat of the heat storage medium,
flow rate of heat storage medium, T, for the output of the photothermal heat collection system (1)setTo a predetermined temperature, ToutThe temperature of the heat storage medium output by the photo-thermal heat collection system (1) is represented by eta, and the eta represents the comprehensive efficiency of the electric heating system (9) and the heating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010790431.8A CN112202390B (en) | 2020-08-07 | 2020-08-07 | Photo-thermal photovoltaic complementary cooperative power generation system and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010790431.8A CN112202390B (en) | 2020-08-07 | 2020-08-07 | Photo-thermal photovoltaic complementary cooperative power generation system and operation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112202390A true CN112202390A (en) | 2021-01-08 |
| CN112202390B CN112202390B (en) | 2025-07-29 |
Family
ID=74006421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010790431.8A Active CN112202390B (en) | 2020-08-07 | 2020-08-07 | Photo-thermal photovoltaic complementary cooperative power generation system and operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112202390B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115996016A (en) * | 2023-03-22 | 2023-04-21 | 赫里欧新能源有限公司 | BIPV-based charging and generating integrated energy storage management system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017100639A1 (en) * | 2017-01-13 | 2018-08-02 | Hochschule Landshut | Storage-controlled system control for a combined heat and power plant |
| CN109687520A (en) * | 2019-01-07 | 2019-04-26 | 浙江中光新能源科技有限公司 | A kind of photovoltaic for electric power isolated network and photothermal complementary electricity generation system |
| CN209558703U (en) * | 2019-01-07 | 2019-10-29 | 浙江中光电力工程有限公司 | Photovoltaic and photo-thermal hybrid power generation system |
| CN110930073A (en) * | 2019-12-14 | 2020-03-27 | 东北电力大学 | A day-ahead scheduling method for wind-solar-solar-thermal combined power generation system considering price-based demand response |
| CN212305206U (en) * | 2020-08-07 | 2021-01-05 | 中国华能集团清洁能源技术研究院有限公司 | Photo-thermal photovoltaic complementary cooperative power generation system |
-
2020
- 2020-08-07 CN CN202010790431.8A patent/CN112202390B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017100639A1 (en) * | 2017-01-13 | 2018-08-02 | Hochschule Landshut | Storage-controlled system control for a combined heat and power plant |
| CN109687520A (en) * | 2019-01-07 | 2019-04-26 | 浙江中光新能源科技有限公司 | A kind of photovoltaic for electric power isolated network and photothermal complementary electricity generation system |
| CN209558703U (en) * | 2019-01-07 | 2019-10-29 | 浙江中光电力工程有限公司 | Photovoltaic and photo-thermal hybrid power generation system |
| CN110930073A (en) * | 2019-12-14 | 2020-03-27 | 东北电力大学 | A day-ahead scheduling method for wind-solar-solar-thermal combined power generation system considering price-based demand response |
| CN212305206U (en) * | 2020-08-07 | 2021-01-05 | 中国华能集团清洁能源技术研究院有限公司 | Photo-thermal photovoltaic complementary cooperative power generation system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115996016A (en) * | 2023-03-22 | 2023-04-21 | 赫里欧新能源有限公司 | BIPV-based charging and generating integrated energy storage management system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112202390B (en) | 2025-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108321837B (en) | Wind power-photo-thermal combined power generation system and operation method thereof | |
| Sanaye et al. | Cleaner production of combined cooling, heating, power and water for isolated buildings with an innovative hybrid (solar, wind and LPG fuel) system | |
| CN110826815B (en) | A regional integrated energy system operation optimization method considering integrated demand response | |
| US20240191702A1 (en) | Capacity configuration method for photovoltaic/photothermal/aa-caes of combined cooling, heating and power | |
| CN107565613B (en) | A kind of photo-thermal power station Optimization Scheduling a few days ago considering electric power assisted hatching | |
| CN111030104B (en) | A method for improving energy utilization rate of a multi-energy system containing a hydrogen storage device | |
| CN110635514B (en) | Grid-connected microgrid optimal configuration method | |
| CN102518571A (en) | Large-sized integrated utilization system for photo-thermal power generating station and photovoltaic power generating station | |
| CN116717779B (en) | Molten salt heat storage power station transformed by thermal power unit and electric heating cooperative scheduling method | |
| CN112541609A (en) | Wind-light-heat and water energy storage combined renewable energy power generation system capacity optimization model | |
| Pan et al. | A switchable concentrating photovoltaic/concentrating solar power (CPV/CSP) hybrid system for flexible electricity/thermal generation | |
| CN110056489A (en) | Photovoltaic power generation and solar thermal energy-combined combustion and steam turbine power complementary power generation system | |
| CN116938127A (en) | Concentrating photovoltaic-photo-thermal integrated system with adjustable electric and thermal output proportion | |
| CN112953364A (en) | Photothermal-wind power-photovoltaic combined system operation optimization model considering photothermal power station service life | |
| CN112149339A (en) | Capacity optimization model of wind power-photovoltaic-photothermal-electric heater complementary power generation system | |
| CN209688969U (en) | Multiple renewable energy sources combination cross-season heat-storing heating system | |
| CN212305206U (en) | Photo-thermal photovoltaic complementary cooperative power generation system | |
| CN112202390A (en) | Photo-thermal photovoltaic complementary cooperative power generation system and operation method | |
| Xi et al. | A novel smart community: Combining a flexible heating system as electrical demand response to enhance local renewable energy integration | |
| CN202451379U (en) | Integration utilization device of photo-thermal photovoltaic power station | |
| Xingping et al. | Operation mode and economic analysis of concentrating solar power station | |
| CN205725653U (en) | Provide multiple forms of energy to complement each other cogeneration concentration photovoltaic system | |
| CN210440172U (en) | Solar power generation system capable of realizing all-day power generation | |
| CN110793221B (en) | Wind, light and heat power complementary system | |
| Sha et al. | Robust economic dispatching of high renewable energy penetrated system with concentrating solar power providing reserve capacity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |