CN105846419A - Photovoltaic and diesel complementary power supply system based on DC microgrid - Google Patents
Photovoltaic and diesel complementary power supply system based on DC microgrid Download PDFInfo
- Publication number
- CN105846419A CN105846419A CN201610339316.2A CN201610339316A CN105846419A CN 105846419 A CN105846419 A CN 105846419A CN 201610339316 A CN201610339316 A CN 201610339316A CN 105846419 A CN105846419 A CN 105846419A
- Authority
- CN
- China
- Prior art keywords
- battery
- power
- photovoltaic
- load
- power generation
- 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
- 230000000295 complement effect Effects 0.000 title claims abstract description 13
- 238000010248 power generation Methods 0.000 claims abstract description 59
- 238000007599 discharging Methods 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 108010001267 Protein Subunits Proteins 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/10—Parallel operation of DC sources
-
- 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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/14—Balancing the load in a network
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
-
- 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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/10—Parallel operation of DC sources
- H02J1/106—Parallel operation of DC sources for load balancing, symmetrisation, or sharing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
技术领域 technical field
本发明属于发电及电源控制技术领域，具体涉及一种基于直流微电网的光伏、柴油互补供电系统。 The invention belongs to the technical field of power generation and power supply control, and in particular relates to a photovoltaic and diesel complementary power supply system based on a DC microgrid.
背景技术 Background technique
随着能源危机和环境问题的日益加剧，世界各国都更加关注新能源的发展。近年来，电力电子控制技术和光伏等新能源发电技术的发展、成熟，以风能和太阳能为代表的分布式新能源发电渗透率不断升高，一大批无电地区的用电问题也由此得到解决。 With the increasing energy crisis and environmental problems, countries all over the world are paying more attention to the development of new energy. In recent years, with the development and maturity of power electronic control technology and new energy generation technologies such as photovoltaics, the penetration rate of distributed new energy generation represented by wind energy and solar energy has continued to increase, and the problem of electricity consumption in a large number of areas without electricity has also been solved. solve.
在现有技术中，太阳能供电或者风光互补供电系统、柴油机供电中，电能储存在蓄电池中，由于蓄电池直接挂载在直流母线上，而蓄电池若要得到有效利用，其输出电压会有较大的波动，可能导致母线电压或负载电压不稳定，甚至可能出现负荷无法正常工作的现象。为了保证输出负载的稳定供电，蓄电池电压只能在很小范围波动，蓄电池的有效利用容量极大降低。能量在蓄电池与负载之间的分配也不易实现独立控制，蓄电池充放电不受控制，蓄电池寿命缩短。 In the prior art, in solar power supply or wind-solar complementary power supply system and diesel engine power supply, the electric energy is stored in the battery, since the battery is directly mounted on the DC bus, and if the battery is to be effectively utilized, its output voltage will have a relatively large Fluctuations may lead to unstable bus voltage or load voltage, and may even cause the load to fail to work normally. In order to ensure the stable power supply of the output load, the battery voltage can only fluctuate in a small range, and the effective utilization capacity of the battery is greatly reduced. The distribution of energy between the battery and the load is not easy to achieve independent control, the charging and discharging of the battery is not controlled, and the life of the battery is shortened.
基于交流架构的微网系统，可沿用原有的交流设备，如配电线路和电力开关等，并且与交流负荷兼容，保护装置相对成熟。然而，大多数新能源分布式发电装置、储能装置以及越来越多的负载使用直流电。因此若采用直流微网架构，可以省去额外的DC/AC变流环节，结构简单且效率更高，更重要的是控制策略更加灵活、可靠。 The micro-grid system based on AC architecture can continue to use the original AC equipment, such as distribution lines and power switches, and is compatible with AC loads, and the protection devices are relatively mature. However, most new energy distributed power generation devices, energy storage devices, and more and more loads use direct current. Therefore, if the DC micro-grid architecture is adopted, the additional DC/AC conversion link can be omitted, the structure is simple and the efficiency is higher, and more importantly, the control strategy is more flexible and reliable.
发明内容 Contents of the invention
本发明要解决的技术问题是：提供一种基于直流微电网的光伏、柴油互补供电系统，实现直流微网系统优化运行。 The technical problem to be solved by the present invention is to provide a photovoltaic and diesel complementary power supply system based on a DC microgrid to realize optimal operation of the DC microgrid system.
本发明为解决上述技术问题所采取的技术方案为：一种基于直流微电网的光伏、柴油互补供电系统，它包括依次连接的光伏发电模块、第一单向隔离DC/DC变换器、直流母线和负载，所述的第一单向隔离DC/DC变换器由MPPT控制器控制，其特征在于：它还包括蓄电池模块、柴油发电机模块、以及能量管理系统； The technical solution adopted by the present invention to solve the above technical problems is: a photovoltaic and diesel complementary power supply system based on DC microgrid, which includes sequentially connected photovoltaic power generation modules, a first unidirectional isolated DC/DC converter, and a DC bus and load, the first unidirectional isolated DC/DC converter is controlled by an MPPT controller, and it is characterized in that: it also includes a storage battery module, a diesel generator module, and an energy management system;
所述的蓄电池模块包括蓄电池、双向隔离DC/DC变换器和充放电控制器，蓄电池通过双隔离DC/DC变换器接入直流母线，充放电控制器用于采集蓄电池的状态参数和控制双向隔离DC/DC变换器； The battery module includes a battery, a bidirectional isolated DC/DC converter and a charging and discharging controller, the battery is connected to the DC bus through a double isolated DC/DC converter, and the charging and discharging controller is used to collect the state parameters of the battery and control the bidirectional isolated DC /DC converter;
所述的柴油发电机模块包括依次连接并最终接入直流母线的柴油发电机、整流电路和第二单向隔离DC/DC变换器； The diesel generator module includes a diesel generator, a rectifier circuit and a second unidirectional isolated DC/DC converter connected in sequence and finally connected to the DC bus;
所述的能量管理系统分别通过总线与所述的第一单向隔离DC/DC变换器、MPPT控制器、充放电控制器、第二单向隔离DC/DC变换器和柴油发电机连接，用于收集总线上所有设备的工作状态，在预设的运行模式下，下发调度指令。 The energy management system is respectively connected to the first unidirectional isolated DC/DC converter, MPPT controller, charging and discharging controller, the second unidirectional isolated DC/DC converter and the diesel generator through the bus. Collect the working status of all devices on the bus, and issue scheduling instructions in the preset operation mode.
按上述系统，所述的预设的运行模式包括： According to the above system, the preset operation modes include:
模式1、光伏发电为主导的运行模式： Mode 1. Operation mode dominated by photovoltaic power generation:
当光伏发电模块的输出功率大于负载的用电需求和蓄电池最大吸收功率的总和，控制光伏发电模块脱离MPPT状态，且限制光伏发电模块的输出功率等于负载的用电需求和蓄电池最大吸收功率的总和，给负载供电，同时向蓄电池充电，直至蓄电池充满，此时控制光伏发电模块脱离MPPT状态，且限制光伏发电模块的输出功率等于负载的用电需求，给负载供电并使蓄电池处于浮充状态； When the output power of the photovoltaic power generation module is greater than the sum of the power demand of the load and the maximum absorbed power of the battery, control the photovoltaic power generation module to leave the MPPT state, and limit the output power of the photovoltaic power generation module to be equal to the sum of the power demand of the load and the maximum absorbed power of the battery , supply power to the load, and charge the battery at the same time until the battery is fully charged. At this time, control the photovoltaic power generation module to leave the MPPT state, and limit the output power of the photovoltaic power generation module to be equal to the power demand of the load, supply power to the load and keep the battery in a floating charge state;
模式2：蓄电池为主导的运行模式： Mode 2: battery-led operation mode:
模式2-1：当光伏发电模块的输出功率大于负载的用电需求，且小于负载的用电需求和蓄电池最大吸收功率的总和，控制光伏发电模块工作在MPPT模式，给负载供电，同时给蓄电池充电； Mode 2-1: When the output power of the photovoltaic power generation module is greater than the power demand of the load, and less than the sum of the power demand of the load and the maximum absorbed power of the battery, the photovoltaic power generation module is controlled to work in MPPT mode to supply power to the load and at the same time to supply power to the battery Charge;
模式2-2：当光伏发电模块的输出功率小于负载的用电需求，且光伏发电模块的输出功率和蓄电池的输出功率总和大于或等于负载的用电需求，此时控制光伏发电模块工作在MPPT模式，且蓄电池向负载供电； Mode 2-2: When the output power of the photovoltaic power generation module is less than the power demand of the load, and the sum of the output power of the photovoltaic power generation module and the output power of the battery is greater than or equal to the power demand of the load, then the photovoltaic power generation module is controlled to work in MPPT mode, and the battery supplies power to the load;
模式3：柴油机为主导的运行模式： Mode 3: Diesel-led operation mode:
当光伏发电模块的输出功率和蓄电池的输出功率总和小于负载的用电需求，此时控制光伏发电模块工作在MPPT模式，蓄电池向负载供电，且启动柴油发电机发电； When the sum of the output power of the photovoltaic power generation module and the output power of the battery is less than the power demand of the load, the photovoltaic power generation module is controlled to work in MPPT mode, the battery supplies power to the load, and the diesel generator is started to generate electricity;
当蓄电池剩余容量为最小值无法放电时，切断蓄电池与直流母线的连接。 When the remaining capacity of the battery reaches the minimum value and cannot be discharged, cut off the connection between the battery and the DC bus.
按上述系统，所述的光伏供电模块包括串联或并联的光伏阵列。 According to the above system, the photovoltaic power supply module includes photovoltaic arrays connected in series or in parallel.
本发明的有益效果为：本发明采用直流微电网的结构，利用双向隔离DC/DC变换器，能够对蓄电池的充放电过程进行独立控制，延长蓄电池的使用寿命，维持母线电压的稳定，保证输出负载的稳定供电；对该互补供电系统的能量管理系统采用直流母线控制、能量管理的双层控制的方法，实现供电系统的优化运行，提高发电收益，延长设备寿命，增强供电可靠性等目标。 The beneficial effects of the present invention are: the present invention adopts the structure of DC micro-grid, utilizes the bidirectional isolated DC/DC converter, can independently control the charging and discharging process of the storage battery, prolongs the service life of the storage battery, maintains the stability of the bus voltage, and ensures the output Stable power supply for loads; the energy management system of the complementary power supply system adopts the double-layer control method of DC bus control and energy management to realize the optimal operation of the power supply system, improve power generation revenue, extend equipment life, and enhance power supply reliability.
附图说明 Description of drawings
图1为本发明一实施例的系统结构示意图。 FIG. 1 is a schematic diagram of the system structure of an embodiment of the present invention.
图2为本发明一实施例的三种运行模式切换示意图。 Fig. 2 is a schematic diagram of switching between three operating modes according to an embodiment of the present invention.
具体实施方式 detailed description
下面结合具体实例和附图对本发明做进一步说明。 The present invention will be further described below in conjunction with specific examples and accompanying drawings.
本发明提供一种基于直流微电网的光伏、柴油互补供电系统，如图1所示，它包括依次连接的光伏发电模块、第一单向隔离DC/DC变换器、直流母线和负载，所述的第一单向隔离DC/DC变换器由MPPT控制器控制，它还包括蓄电池模块、柴油发电机模块、以及能量管理系统；所述的蓄电池模块包括蓄电池、双向隔离DC/DC变换器和充放电控制器，蓄电池通过双隔离DC/DC变换器接入直流母线，充放电控制器用于采集蓄电池的状态参数和控制双向隔离DC/DC变换器；所述的柴油发电机模块包括依次连接并最终接入直流母线的柴油发电机、整流电路和第二单向隔离DC/DC变换器；所述的能量管理系统分别通过总线与所述的第一单向隔离DC/DC变换器、MPPT控制器、充放电控制器、第二单向隔离DC/DC变换器和柴油发电机连接，用于收集总线上所有设备的工作状态，在预设的运行模式下，下发调度指令。 The present invention provides a photovoltaic and diesel complementary power supply system based on a DC microgrid, as shown in Figure 1, it includes a photovoltaic power generation module connected in sequence, a first unidirectional isolated DC/DC converter, a DC bus and a load, the The first unidirectional isolated DC/DC converter is controlled by the MPPT controller, which also includes a battery module, a diesel generator module, and an energy management system; the battery module includes a battery, a bidirectional isolated DC/DC converter and a charger discharge controller, the storage battery is connected to the DC bus through a double isolated DC/DC converter, and the charge and discharge controller is used to collect the state parameters of the storage battery and control the bidirectional isolated DC/DC converter; the diesel generator module includes sequentially connected and finally A diesel generator connected to the DC bus, a rectifier circuit and a second unidirectional isolated DC/DC converter; the energy management system communicates with the first unidirectional isolated DC/DC converter and the MPPT controller through the bus respectively , a charging and discharging controller, a second unidirectional isolated DC/DC converter and a diesel generator are connected to collect the working status of all devices on the bus, and issue dispatching instructions in a preset operating mode.
设EES为蓄电池当前剩余容量；EES_MIN和EES_MAX分别为蓄电池容量下限和上限；PPV_O、PDE_O分别为光伏发电模块、柴油发电机的输出功率；PES_O和PES_I分别为蓄电池输出功率和吸收功率；PL为负载所需要的功率。 Let E ES be the current remaining capacity of the battery; E ES_MIN and E ES_MAX are the lower limit and upper limit of the battery capacity respectively; P PV_O and P DE_O are the output power of the photovoltaic power generation module and the diesel generator respectively; P ES_O and P ES_I are the output power of the battery respectively and absorbed power; PL is the power required by the load.
所述的预设的运行模式包括： The preset operating modes include:
模式1、光伏发电为主导的运行模式： Mode 1. Operation mode dominated by photovoltaic power generation:
当光伏发电模块的输出功率大于负载的用电需求和蓄电池最大吸收功率的总和（即PPV_O >PES_I +PL），控制光伏发电模块脱离MPPT状态，且限制光伏发电模块的输出功率等于负载的用电需求和蓄电池最大吸收功率的总和（即PPV_O = PES_I+PL），给负载供电，同时向蓄电池充电，直至蓄电池充满（即EES =EES_MAX），此时控制光伏发电模块脱离MPPT状态，且限制光伏发电模块的输出功率等于负载的用电需求（即PPV_O =PL），给负载供电并使蓄电池处于浮充状态； When the output power of the photovoltaic power generation module is greater than the sum of the power demand of the load and the maximum absorbed power of the battery (ie PP PV_O >P ES_I + PL ), control the photovoltaic power generation module to leave the MPPT state, and limit the output power of the photovoltaic power generation module to be equal to the load The sum of the electricity demand and the maximum absorbed power of the battery (ie P PV_O = P ES_I + PL ), supply power to the load, and charge the battery at the same time until the battery is fully charged (ie E ES =E ES_MAX ), at this time control the photovoltaic power generation module Leave the MPPT state, and limit the output power of the photovoltaic power generation module to be equal to the power demand of the load (that is, PP PV_O = PL ), supply power to the load and keep the battery in a floating charge state;
模式2：蓄电池为主导的运行模式： Mode 2: battery-led operation mode:
模式2-1：当光伏发电模块的输出功率大于负载的用电需求（即PPV_O > PL），且小于负载的用电需求和蓄电池最大吸收功率的总和（即PPV_O <PES_I +PL），控制光伏发电模块工作在MPPT模式，给负载供电，同时给蓄电池充电； Mode 2-1: When the output power of the photovoltaic power generation module is greater than the power demand of the load (ie P PV_O > PL ), and less than the sum of the power demand of the load and the maximum absorbed power of the battery (ie P PV_O < P ES_I +P L ), control the photovoltaic power generation module to work in MPPT mode, supply power to the load, and charge the battery at the same time;
模式2-2：当光伏发电模块的输出功率小于负载的用电需求，且光伏发电模块的输出功率和蓄电池的输出功率总和大于或等于负载的用电需求（即PPV_O +PES_O >=PL），此时控制光伏发电模块工作在MPPT模式，且蓄电池向负载供电； Mode 2-2: When the output power of the photovoltaic power generation module is less than the power demand of the load, and the sum of the output power of the photovoltaic power generation module and the output power of the battery is greater than or equal to the power demand of the load (that is, P PV_O +P ES_O >=P L ), at this time, control the photovoltaic power generation module to work in MPPT mode, and the battery supplies power to the load;
模式3：柴油机为主导的运行模式： Mode 3: Diesel-led operation mode:
当光伏发电模块的输出功率和蓄电池的输出功率总和小于负载的用电需求（即PPV_O +PES_O <PL），此时控制光伏发电模块工作在MPPT模式，蓄电池向负载供电，且启动柴油发电机发电，即PPV_O +PES_O +PDE_O=PL； When the sum of the output power of the photovoltaic power generation module and the output power of the battery is less than the power demand of the load (ie PPV_O + P ES_O < PL ), the photovoltaic power generation module is controlled to work in MPPT mode, the battery supplies power to the load, and the diesel engine is started The generator generates electricity, that is, P PV_O +P ES_O +P DE_O =P L ;
当蓄电池剩余容量为最小值无法放电时（即EES =EES_MIN），切断蓄电池与直流母线的连接。通常情况下，需要光伏发电模块适当给蓄电池充电后，再切除蓄电池与直流母线的连接，并保持柴油发电机发电，使PPV_O +PDE_O=PL。 When the battery remaining capacity reaches the minimum value and cannot be discharged (that is, E ES =E ES_MIN ), cut off the connection between the battery and the DC bus. Normally, the photovoltaic power generation module needs to properly charge the battery, then cut off the connection between the battery and the DC bus, and keep the diesel generator generating power, so that P PV_O +P DE_O =P L .
进一步的，所述的光伏供电模块包括串联或并联的光伏阵列。 Further, the photovoltaic power supply module includes photovoltaic arrays connected in series or in parallel.
三种模式根据直流母线的电压实现切换，从而控制直流母线电压的稳定，这就是直流母线电压控制。 The three modes are switched according to the voltage of the DC bus to control the stability of the DC bus voltage, which is the DC bus voltage control.
同时，能量管理系统控制统揽全局，由于第一单向隔离DC/DC变换器及MPPT控制器、双向隔离DC/DC变换器及其充放电控制器、第二单向隔离DC/DC变换器等通过总线连接到能量管理系统，它们既起到控制变换的作用，又要通过总线向能量管理系统上报自己所属的那一部分的运行状态参数。能量管理系统通过自上而下的决断仲裁机制可以实现光伏、柴油互补供电的整体优化控制。通过通信总线下发调度指令，调整系统中各单元，可以实现光伏发电最大能量捕获、蓄电池剩余电量管理、子单元切入切出、系统监控与保护等系统级功能。 At the same time, the energy management system controls the overall situation. Since the first unidirectional isolated DC/DC converter and MPPT controller, the bidirectional isolated DC/DC converter and its charging and discharging controller, and the second unidirectional isolated DC/DC converter They are connected to the energy management system through the bus, they not only play the role of control transformation, but also report the operating status parameters of their part to the energy management system through the bus. The energy management system can realize the overall optimal control of photovoltaic and diesel complementary power supply through a top-down decision-making arbitration mechanism. Send dispatching instructions through the communication bus and adjust each unit in the system to achieve system-level functions such as maximum energy capture of photovoltaic power generation, management of remaining battery power, switching in and out of sub-units, system monitoring and protection, etc.
三种模式彼此自由切换是根据直流母线的电压的变动，设定VH为直流母线电压允许变动的最大值，VL为母线电压允许变动的最小值，VM 为直流母线电压的标准值，VT 为直流母线电压的当前检测值。 The three modes are free to switch each other according to the change of the DC bus voltage. V H is set as the maximum value of the DC bus voltage allowable change, V L is the minimum value of the allowable change of the bus voltage, and V M is the standard value of the DC bus voltage. V T is the current detected value of the DC bus voltage.
如图2所示，当供电系统工作在模式2下时，理想零界状态下，蓄电池既不输出功率也不吸收功率。当光伏发电输出功率突然下降时，蓄电池输出功率陡然增加，直至达到其最大输出功率后不再继续增加输出功率，供电系统工作在模式2-2。若此时系统中光伏发电模块和蓄电池的输出功率总和仍无法满足负载功率需求，导致母线电压开始下降，柴油发电机启动为负载供电，维持供电系统母线电压VT > VL，系统由模式2逐步切换到模式3。若此时蓄电池耗尽其电量，则母线电压会进一步下降，柴油发电机增加输出功率以维持功率平衡，直到光伏发电恢复原来状态后，供电系统会由模式3向模式2转换，此过程和模式2逐步切换到模式3类似，不再赘述。 As shown in Figure 2, when the power supply system works in mode 2, in the ideal zero-boundary state, the battery neither outputs power nor absorbs power. When the output power of photovoltaic power generation drops suddenly, the output power of the storage battery increases suddenly, and the output power does not continue to increase until it reaches its maximum output power, and the power supply system works in mode 2-2. If the total output power of the photovoltaic power generation module and battery in the system still cannot meet the load power demand at this time, the bus voltage begins to drop, and the diesel generator starts to supply power to the load, maintaining the bus voltage V T > V L of the power supply system, and the system starts from mode 2 Gradually switch to mode 3. If the battery runs out of power at this time, the bus voltage will drop further, and the diesel generator will increase the output power to maintain power balance. After the photovoltaic power generation returns to its original state, the power supply system will switch from mode 3 to mode 2. This process and mode 2 is similar to gradually switching to mode 3, and will not be repeated here.
供电系统运行在模式2时，母线电压由蓄电池控制在VT = VM，此时光伏发电工作在MPPT状态。当光伏发电输出功率突然增加时，蓄电池吸收功率陡然增加，直至达到其最大吸收功率后不再继续增加吸收功率，供电系统工作在模式2-1。此时系统仍有多余功率无法吸收，导致母线电压开始升高，系统由模式2逐步切换到模式1 ，光伏发电脱离MPPT状态，限制功率输出，控制母线电压VT <VH。直到光伏发电恢复原来状态后，供电系统会由模式1向模式2转换，此过程和模式2逐步切换到模式1类似，不再赘述。 When the power supply system operates in mode 2, the bus voltage is controlled by the battery at V T = V M , and the photovoltaic power generation works in the MPPT state. When the output power of photovoltaic power generation increases suddenly, the absorbed power of the battery increases suddenly, until it reaches its maximum absorbed power, it does not continue to increase the absorbed power, and the power supply system works in mode 2-1. At this time, the system still has excess power that cannot be absorbed, causing the bus voltage to rise. The system gradually switches from mode 2 to mode 1. The photovoltaic power generation is out of the MPPT state, and the power output is limited to control the bus voltage V T < V H . After the photovoltaic power generation returns to its original state, the power supply system will switch from mode 1 to mode 2. This process is similar to the gradual switching from mode 2 to mode 1, and will not be repeated here.
基于直流母线电压的控制保证供电系统在三种不同运行模式实现自由切换，使得供电系统能够维持直流母线电压的稳定，负载能正常工作；双向DC/DC变换器的使用，让蓄电池的充放电得以实现独立控制，极大的延长了蓄电池的使用寿命。 The control based on the DC bus voltage ensures that the power supply system can switch freely in three different operating modes, so that the power supply system can maintain the stability of the DC bus voltage and the load can work normally; the use of bidirectional DC/DC converters allows the battery to be charged and discharged. Independent control is realized, which greatly prolongs the service life of the battery.
能量管理系统统揽全局，通过总线与太阳能光伏发电单向隔离DC/DC变换器及其控制器、蓄电池双向隔离DC/DC变换器及其充放电控制器、柴油发电单向隔离DC/DC逆变器及其控制器等相连。各变换器通过总线向能量管理系统传递自己所属部分的运行状态参数。这样，能量管理系统根据各个部分的运行状态和参数，通过自上而下的决断仲裁机制，利用一定的控制规则来控制各个部分的有序运行，可以实现光伏、柴油互补供电的整体优化控制。通过通信总线下发调度指令，调整系统中各单元，可以实现光伏发电最大能量捕获、蓄电池剩余电量管理、子单元切入切出、系统监控与保护等系统级功能。 The energy management system controls the overall situation, through the bus and solar photovoltaic power generation one-way isolated DC/DC converter and its controller, battery two-way isolated DC/DC converter and its charge and discharge controller, diesel power generation one-way isolated DC/DC inverter The inverter and its controller are connected. Each converter transmits the operating status parameters of its part to the energy management system through the bus. In this way, according to the operating status and parameters of each part, the energy management system controls the orderly operation of each part through a top-down decision and arbitration mechanism and uses certain control rules, so as to realize the overall optimization control of photovoltaic and diesel complementary power supply. Send dispatching instructions through the communication bus and adjust each unit in the system to achieve system-level functions such as maximum energy capture of photovoltaic power generation, management of remaining battery power, switching in and out of sub-units, system monitoring and protection, etc.
以上实施例仅用于说明本发明的设计思想和特点，其目的在于使本领域内的技术人员能够了解本发明的内容并据以实施，本发明的保护范围不限于上述实施例。所以，凡依据本发明所揭示的原理、设计思路所作的等同变化或修饰，均在本发明的保护范围之内。 The above embodiments are only used to illustrate the design concept and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339316.2A CN105846419B (en) | 2016-05-20 | 2016-05-20 | Photovoltaic and diesel complementary power supply system based on DC microgrid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339316.2A CN105846419B (en) | 2016-05-20 | 2016-05-20 | Photovoltaic and diesel complementary power supply system based on DC microgrid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105846419A true CN105846419A (en) | 2016-08-10 |
| CN105846419B CN105846419B (en) | 2019-01-25 |
Family
ID=56593374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610339316.2A Expired - Fee Related CN105846419B (en) | 2016-05-20 | 2016-05-20 | Photovoltaic and diesel complementary power supply system based on DC microgrid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105846419B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849343A (en) * | 2017-01-23 | 2017-06-13 | 武汉理工大学 | The communication base station independently-powered switching system of wind-solar-diesel storage and power switching method |
| CN107231002A (en) * | 2017-08-03 | 2017-10-03 | 深圳市海云图新能源有限公司 | A kind of mixed type microgrid electrification energy storage system |
| CN108390409A (en) * | 2018-03-01 | 2018-08-10 | 北京林业大学 | The forest zone microgrid energy management control method of biomass energy and solar energy complementation |
| CN110165690A (en) * | 2019-05-23 | 2019-08-23 | 南京国电南自新能源工程技术有限公司 | Multi-energy complementary micro-grid system based on reversed coordinated regulation |
| CN111313397A (en) * | 2020-03-24 | 2020-06-19 | 北京双登慧峰聚能科技有限公司 | Energy control system and control method for communication base station hybrid power supply system |
| CN111541305A (en) * | 2020-05-01 | 2020-08-14 | 河南龙翔电力研究院股份有限公司 | Micro-grid platform based on data detection system |
| CN112290668A (en) * | 2020-11-06 | 2021-01-29 | 宇能电气有限公司 | Open-air portable hybrid power source power supply system |
| CN112952981A (en) * | 2021-02-07 | 2021-06-11 | 重庆润电科技有限公司 | Oil-electricity hybrid mobile power supply system and working method thereof |
| WO2021189659A1 (en) * | 2020-03-24 | 2021-09-30 | 北京双登慧峰聚能科技有限公司 | Energy control system and control method for hybrid power supply system of communication base station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101007283B1 (en) * | 2008-08-22 | 2011-01-13 | 한국건설기술연구원 | Power control device and power control method for wireless sensor network |
| CN102916481A (en) * | 2012-08-16 | 2013-02-06 | 深圳微网能源管理系统实验室有限公司 | Direct-current microgrid system and energy management method thereof |
| CN104953927A (en) * | 2014-03-25 | 2015-09-30 | 上海格伏能源科技有限公司 | Novel solar and diesel hybrid power generation system |
-
2016
- 2016-05-20 CN CN201610339316.2A patent/CN105846419B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101007283B1 (en) * | 2008-08-22 | 2011-01-13 | 한국건설기술연구원 | Power control device and power control method for wireless sensor network |
| CN102916481A (en) * | 2012-08-16 | 2013-02-06 | 深圳微网能源管理系统实验室有限公司 | Direct-current microgrid system and energy management method thereof |
| CN104953927A (en) * | 2014-03-25 | 2015-09-30 | 上海格伏能源科技有限公司 | Novel solar and diesel hybrid power generation system |
Non-Patent Citations (1)
| Title |
|---|
| 唐西胜等: "基于储能的可再生能源微网运行控制技术", 《电力自动化设备》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849343A (en) * | 2017-01-23 | 2017-06-13 | 武汉理工大学 | The communication base station independently-powered switching system of wind-solar-diesel storage and power switching method |
| CN106849343B (en) * | 2017-01-23 | 2019-05-17 | 武汉理工大学 | The independently-powered switching system of communication base station wind-solar-diesel storage and power switching method |
| CN107231002A (en) * | 2017-08-03 | 2017-10-03 | 深圳市海云图新能源有限公司 | A kind of mixed type microgrid electrification energy storage system |
| CN108390409A (en) * | 2018-03-01 | 2018-08-10 | 北京林业大学 | The forest zone microgrid energy management control method of biomass energy and solar energy complementation |
| CN108390409B (en) * | 2018-03-01 | 2020-12-15 | 北京林业大学 | Energy management and control method of forest microgrid with complementary biomass energy and solar energy |
| CN110165690A (en) * | 2019-05-23 | 2019-08-23 | 南京国电南自新能源工程技术有限公司 | Multi-energy complementary micro-grid system based on reversed coordinated regulation |
| CN111313397A (en) * | 2020-03-24 | 2020-06-19 | 北京双登慧峰聚能科技有限公司 | Energy control system and control method for communication base station hybrid power supply system |
| WO2021189659A1 (en) * | 2020-03-24 | 2021-09-30 | 北京双登慧峰聚能科技有限公司 | Energy control system and control method for hybrid power supply system of communication base station |
| CN111313397B (en) * | 2020-03-24 | 2022-03-22 | 北京双登慧峰聚能科技有限公司 | Energy control system and control method for communication base station hybrid power supply system |
| CN111541305A (en) * | 2020-05-01 | 2020-08-14 | 河南龙翔电力研究院股份有限公司 | Micro-grid platform based on data detection system |
| CN112290668A (en) * | 2020-11-06 | 2021-01-29 | 宇能电气有限公司 | Open-air portable hybrid power source power supply system |
| CN112952981A (en) * | 2021-02-07 | 2021-06-11 | 重庆润电科技有限公司 | Oil-electricity hybrid mobile power supply system and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105846419B (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105846419A (en) | Photovoltaic and diesel complementary power supply system based on DC microgrid | |
| CN104052082B (en) | The light storage associating electric power system that a kind of off-network is incorporated into the power networks | |
| CN103545905B (en) | A kind of photovoltaic direct-current micro-grid energy coordination control method | |
| CN101860270B (en) | Access system for adequately utilizing wind energy and solar energy and realization method thereof | |
| CN103236747B (en) | A photovoltaic power hybrid energy storage system | |
| CN106505615A (en) | A power supply system for electric vehicle charging station based on independent microgrid | |
| CN202586481U (en) | Micro electrical network intelligent balanced charging and power supply system | |
| CN103280840A (en) | Distributed type photovoltaic energy storage system and working method thereof | |
| CN103390900A (en) | Distributed photovoltaic energy storage system and energy management method | |
| CN102005817A (en) | Uninterruptible power supply device based on microgrid and dispatching control method thereof | |
| CN102163871B (en) | Multi-power supply system and method | |
| CN102931722A (en) | Distributed power supply management method and system | |
| CN105262127A (en) | A power adaptive control method for a photovoltaic power generation hybrid energy storage system | |
| CN104242790A (en) | Wind-solar hybrid power generation system | |
| CN102856969A (en) | Solar photovoltaic power generation system | |
| CN202997585U (en) | Household solar energy grid connected generation system | |
| CN111231728A (en) | Photovoltaic energy storage charging and discharging integrated energy control system and method | |
| CN202888862U (en) | Energy storage inverter suitable for distributed new energy power | |
| CN103825294A (en) | Energy storage inverter suitable for distributed new energy electric power | |
| CN101976986A (en) | Independent power supply system based on multi-energy hybrid power generation | |
| CN114884116B (en) | Power supply circuit, new energy control system and energy coordination method | |
| CN201708564U (en) | Off-network type wind and light-combined generating system based on optimum generated energy matching | |
| CN103337868A (en) | Method and device for inhibiting photovoltaic generation output power fluctuation | |
| CN202134923U (en) | Deep charging and discharging type battery energy storage paralleling device | |
| CN202121531U (en) | Solar energy photovoltaic power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190125 Termination date: 20190520 |