CN105529810A - Photovoltaic charging system and control method for energy storage photovoltaic power station - Google Patents
Photovoltaic charging system and control method for energy storage photovoltaic power station Download PDFInfo
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- 238000010248 power generation Methods 0.000 claims abstract description 30
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Classifications
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- 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
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
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- 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
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Abstract
Description
技术领域technical field
本发明涉及光伏发电领域，具体涉及一种储能式光伏电站光伏充电系统及其控制方法。The invention relates to the field of photovoltaic power generation, in particular to an energy storage photovoltaic power plant photovoltaic charging system and a control method thereof.
背景技术Background technique
在早晨和傍晚等光照条件较弱时，现有的光伏发电场合光伏组件输出参数无法满足蓄电池组的充电参数，导致光伏使用效率降低。When the light conditions are weak in the morning and evening, the output parameters of photovoltaic modules in existing photovoltaic power generation sites cannot meet the charging parameters of the battery pack, resulting in a decrease in the efficiency of photovoltaic use.
目前较多的文献报道的都是在光照条件充足时对光伏发电系统进行最大功率点跟踪的研究，对于弱光照条件下提高光伏发电效率的研究较少，对光照弱的判断方式都是对光伏组件输出的电压和电流等电参数进行检测，如果光伏组件较多时，需要检测的相关参数较多，控制系统相对较为复杂，处理和实现就会困难。At present, many literatures report the research on the maximum power point tracking of the photovoltaic power generation system under sufficient light conditions. There are few studies on improving the efficiency of photovoltaic power generation under weak light conditions. The electrical parameters such as the voltage and current output by the modules are detected. If there are many photovoltaic modules, there are many related parameters that need to be detected, and the control system is relatively complicated, so processing and implementation will be difficult.
发明内容Contents of the invention
为解决上述问题，本发明提供了一种储能式光伏电站光伏充电系统及其控制方法，可根据不同的光照条件分级控制充电电路实现光能的充分利用，避免光能浪费，从而提高光伏电站的发电效率。In order to solve the above problems, the present invention provides an energy storage type photovoltaic power station photovoltaic charging system and its control method, which can control the charging circuit in stages according to different lighting conditions to realize the full use of light energy and avoid waste of light energy, thereby improving the efficiency of the photovoltaic power station. power generation efficiency.
为实现上述目的，本发明采取的技术方案为：In order to achieve the above object, the technical scheme that the present invention takes is:
储能式光伏电站光伏充电系统，包括Photovoltaic charging system of energy storage photovoltaic power station, including
光伏组件，为光伏发电系统的能量转化单元，用于完成太阳能到电能的转化；Photovoltaic module is the energy conversion unit of the photovoltaic power generation system, which is used to complete the conversion of solar energy into electric energy;
照度传感器，用于检测光伏组件所处环境的太阳光照强度，并将检测到的数据发送到光伏发电控制器；The illuminance sensor is used to detect the sunlight intensity of the environment where the photovoltaic module is located, and send the detected data to the photovoltaic power generation controller;
光伏发电控制器，用于接收照度传感器所检测到的太阳光照强度，并依据光伏组件的伏安特性曲线判断光伏组件的输出参数大小，调整充电控制器的输出参数。The photovoltaic power generation controller is used to receive the sunlight intensity detected by the illuminance sensor, judge the output parameter of the photovoltaic module according to the volt-ampere characteristic curve of the photovoltaic module, and adjust the output parameter of the charging controller.
蓄电池组，由蓄电池组A、蓄电池组B和蓄电池组C构成，蓄电池组A和蓄电池组B分别通过逆变器A和逆变器B与负载相连；The battery pack is composed of battery pack A, battery pack B and battery pack C, and battery pack A and battery pack B are connected to the load through inverter A and inverter B respectively;
充电控制器，通过切换开关与蓄电池组A、蓄电池组B和蓄电池组C连接，用于控制光伏组件为蓄电池组A、蓄电池组B和蓄电池组C充电。The charging controller is connected to battery pack A, battery pack B and battery pack C through a switch, and is used to control the photovoltaic module to charge battery pack A, battery pack B and battery pack C.
上述储能式光伏电站光伏充电系统的控制方法为：The control method of the photovoltaic charging system of the above-mentioned energy storage photovoltaic power station is as follows:
(1)当环境光照度强时，将充电控制器的充电参数设置为蓄电池组A的充电参数，同时将转换切换开关将充电控制器的输出切向至蓄电池组A，完成正常的光伏充电储能过程；(1) When the ambient light is strong, set the charging parameters of the charging controller to the charging parameters of battery pack A, and at the same time switch the switch to switch the output of the charging controller to battery pack A to complete normal photovoltaic charging and energy storage process;
(2)当环境光照度偏弱，光伏组件输出参数无法满足蓄电池组A的充电参数要求时，光伏发电控制器降低充电控制器参数，同时将转换切换开关切换至蓄电池组B，将光伏组件输出对蓄电池组B进行充电，蓄电池组B电参数配置为蓄电池组A电参数的1/2(额定电压参数)；(2) When the ambient light is weak and the output parameters of photovoltaic modules cannot meet the charging parameter requirements of battery group A, the photovoltaic power generation controller reduces the charging controller parameters, and at the same time switches the switch to battery group B, and the output of photovoltaic modules is Battery pack B is charged, and the electrical parameters of battery pack B are configured to be 1/2 of the electrical parameters of battery pack A (rated voltage parameters);
(3)当环境光照度进一步降低，光伏组件输出参数无法满足蓄电池组B的充电参数要求时，光伏发电控制器进一步降低充电控制器参数，同时将转换切换开关切换至蓄电池组C，将光伏组件输出对蓄电池组C进行充电，蓄电池组C电压参数设置为24伏，用于存储弱光照条件下的光伏组件输出的电能，为整个光伏发电系统的各控制装置提供电能消耗；蓄电池组A和蓄电池组B分别通过逆变器A和逆变器B将各自存储的电能进行逆变后为负载供电。(3) When the ambient light is further reduced and the output parameters of the photovoltaic modules cannot meet the charging parameter requirements of the battery pack B, the photovoltaic power generation controller further reduces the charging controller parameters, and at the same time switches the switching switch to the battery pack C, and the output of the photovoltaic modules Charge the battery pack C, whose voltage parameter is set to 24 volts, which is used to store the electric energy output by the photovoltaic modules under weak light conditions, and provide power consumption for each control device of the entire photovoltaic power generation system; the battery pack A and the battery pack B respectively inverts the stored electric energy through inverter A and inverter B to supply power to the load.
本发明具有以下有益效果：The present invention has the following beneficial effects:
通过检测环境照度，可以非常方便的判断光照强度，同时通过太阳能电池板的伏安特性曲线可以非常方便的判断出光伏组件输出的电参数大小，从而实现特殊的充电控制方案，最终提高光伏发电的效率；By detecting the ambient illuminance, it is very convenient to judge the light intensity, and at the same time, through the volt-ampere characteristic curve of the solar panel, it is very convenient to judge the electrical parameters output by the photovoltaic module, so as to realize a special charging control scheme and finally improve the efficiency of photovoltaic power generation. efficiency;
可以满足各种光照条件下分别实施不同的充电控制方案，有效的解决弱光照条件下光能浪费的问题，具有一定的实用性。It can implement different charging control schemes under various lighting conditions, effectively solve the problem of wasting light energy under weak lighting conditions, and has certain practicability.
可根据不同的光照条件分级控制充电电路实现光能的充分利用，避免光能浪费，从而提高光伏电站的发电效率。According to different lighting conditions, the charging circuit can be controlled in stages to realize the full use of light energy, avoid the waste of light energy, and thus improve the power generation efficiency of the photovoltaic power station.
附图说明Description of drawings
图1为本发明实施例储能式光伏电站光伏充电系统的结构框图。Fig. 1 is a structural block diagram of a photovoltaic charging system of an energy storage photovoltaic power station according to an embodiment of the present invention.
具体实施方式detailed description
为了使本发明的目的及优点更加清楚明白，以下结合实施例对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
如图1所示，本发明实施例提供了储能式光伏电站光伏充电系统，包括As shown in Figure 1, an embodiment of the present invention provides a photovoltaic charging system for an energy storage photovoltaic power station, including
光伏组件，为光伏发电系统的能量转化单元，用于完成太阳能到电能的转化；Photovoltaic module is the energy conversion unit of the photovoltaic power generation system, which is used to complete the conversion of solar energy into electric energy;
照度传感器，用于检测光伏组件所处环境的太阳光照强度，并将检测到的数据发送到光伏发电控制器；The illuminance sensor is used to detect the sunlight intensity of the environment where the photovoltaic module is located, and send the detected data to the photovoltaic power generation controller;
光伏发电控制器，用于接收照度传感器所检测到的太阳光照强度，并依据光伏组件的伏安特性曲线判断光伏组件的输出参数大小，调整充电控制器的输出参数。The photovoltaic power generation controller is used to receive the sunlight intensity detected by the illuminance sensor, judge the output parameter of the photovoltaic module according to the volt-ampere characteristic curve of the photovoltaic module, and adjust the output parameter of the charge controller.
蓄电池组，由蓄电池组A、蓄电池组B和蓄电池组C构成，蓄电池组A和蓄电池组B分别通过逆变器A和逆变器B与负载相连；The battery pack is composed of battery pack A, battery pack B and battery pack C, and battery pack A and battery pack B are connected to the load through inverter A and inverter B respectively;
充电控制器，通过切换开关与蓄电池组A、蓄电池组B和蓄电池组C连接，用于控制光伏组件为蓄电池组A、蓄电池组B和蓄电池组C充电。The charging controller is connected to battery pack A, battery pack B and battery pack C through a switch, and is used to control the photovoltaic module to charge battery pack A, battery pack B and battery pack C.
本发明实施例还提供了上述储能式光伏电站光伏充电系统的控制方法为：The embodiment of the present invention also provides a control method for the photovoltaic charging system of the energy storage photovoltaic power station as follows:
(1)当环境光照度强时，将充电控制器的充电参数设置为蓄电池组A的充电参数，同时将转换切换开关将充电控制器的输出切向至蓄电池组A，完成正常的光伏充电储能过程；(1) When the ambient light is strong, set the charging parameters of the charging controller to the charging parameters of battery pack A, and at the same time switch the switch to switch the output of the charging controller to battery pack A to complete normal photovoltaic charging and energy storage process;
(2)当环境光照度偏弱，光伏组件输出参数无法满足蓄电池组A的充电参数要求时，光伏发电控制器降低充电控制器参数，同时将转换切换开关切换至蓄电池组B，将光伏组件输出对蓄电池组B进行充电，蓄电池组B电参数配置为蓄电池组A电参数的1/2(额定电压参数)；(2) When the ambient light is weak and the output parameters of photovoltaic modules cannot meet the charging parameter requirements of battery group A, the photovoltaic power generation controller reduces the charging controller parameters, and at the same time switches the switch to battery group B, and the output of photovoltaic modules is Battery pack B is charged, and the electrical parameters of battery pack B are configured to be 1/2 of the electrical parameters of battery pack A (rated voltage parameters);
(3)当环境光照度进一步降低，光伏组件输出参数无法满足蓄电池组B的充电参数要求时，光伏发电控制器进一步降低充电控制器参数，同时将转换切换开关切换至蓄电池组C，将光伏组件输出对蓄电池组C进行充电，蓄电池组C电压参数设置为24伏，用于存储弱光照条件下的光伏组件输出的电能，为整个光伏发电系统的各控制装置提供电能消耗；蓄电池组A和蓄电池组B分别通过逆变器A和逆变器B将各自存储的电能进行逆变后为负载供电。(3) When the ambient light is further reduced and the output parameters of the photovoltaic modules cannot meet the charging parameter requirements of the battery pack B, the photovoltaic power generation controller further reduces the charging controller parameters, and at the same time switches the switching switch to the battery pack C, and the output of the photovoltaic modules Charge the battery pack C, whose voltage parameter is set to 24 volts, which is used to store the electric energy output by the photovoltaic modules under weak light conditions, and provide power consumption for each control device of the entire photovoltaic power generation system; the battery pack A and the battery pack B respectively inverts the stored electric energy through inverter A and inverter B to supply power to the load.
本具体实施通过照度传感器实时检测环境太阳光强度，并依据太阳能电池的伏安特性曲线分析和计算太阳能电池输出的电压、电流大小，为控制充电控制器实施不同的充电策略提供依据，根据不同的环境光照情况，自动对不同的蓄电池组进行充电管理，从而实现不同光照情况下太阳能的分级利用，实现光能的充分利用，避免光能浪费，从而提高光伏电站的发电效率。This specific implementation uses the illuminance sensor to detect the intensity of ambient sunlight in real time, and analyzes and calculates the output voltage and current of the solar battery according to the volt-ampere characteristic curve of the solar battery, so as to provide a basis for controlling the charging controller to implement different charging strategies. According to the ambient light conditions, different battery packs are automatically charged and managed, so as to realize the hierarchical utilization of solar energy under different light conditions, realize the full use of light energy, avoid light energy waste, and improve the power generation efficiency of photovoltaic power plants.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.
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| CN110350643A (en) * | 2019-07-15 | 2019-10-18 | 周建军 | A kind of Novel connecting method promoting photovoltaic efficiency |
| CN110579276A (en) * | 2019-10-09 | 2019-12-17 | 腾色智能科技(南京)有限公司 | Illuminance detection device and method and Internet of things terminal equipment |
| CN110579276B (en) * | 2019-10-09 | 2024-02-09 | 腾色智能科技(南京)有限公司 | Illuminance detection device and method and terminal equipment of Internet of things |
| CN112202233A (en) * | 2020-10-27 | 2021-01-08 | 陈方红 | Power unit for solar charging |
| CN117375192A (en) * | 2023-12-07 | 2024-01-09 | 深圳博巨矽科技有限公司 | Power management method and circuit for charging and supplying power by utilizing light energy and photovoltaic keyboard |
| CN117375192B (en) * | 2023-12-07 | 2024-03-22 | 深圳博巨矽科技有限公司 | Power management method and circuit for charging and supplying power by utilizing light energy and photovoltaic keyboard |
| CN118300183A (en) * | 2024-05-07 | 2024-07-05 | 国网山东省电力公司德州供电公司 | Distributed photovoltaic energy storage coordination control method and system |
| CN118300183B (en) * | 2024-05-07 | 2024-10-01 | 国网山东省电力公司德州供电公司 | A distributed photovoltaic energy storage coordinated control method and system |
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Application publication date: 20160427 |