Optical storage micro-grid system and its self-starting method
A self-start, micro-grid technology, applied in the field of control, can solve the problems of low-power shutdown of the system, power loss of the energy storage inverter system, etc., to achieve the effect of reasonable and well-founded start-up timing and improve the success probability of restart
Active Publication Date: 2022-04-08
HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD
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[0005] In this regard, this application provides an optical storage micro-grid system and its self-starting method to solve the problem that the existing manual intervention restart method based only on the light conditions may easily lead to further power loss of the energy storage inverter system or even shutdown of the system due to low power. question
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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0059] The first thing to explain is that in the case of sufficient sunlight, the power generated by the photovoltaic inverter system is greater than the power consumed by the load, and the excess power is used to charge the energy storage system in the energy storage inverter system. After the energy storage system is fully charged, the photovoltaic inverter Change the system to limit the processing. The photovoltaic inverter system stops working at night, an...
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This application provides an optical storage micro-grid system and its self-starting method. In the self-starting method, the micro-grid central controller in the optical storage micro-grid system obtains the current lighting conditions and the DC current of the photovoltaic inverter system in real time after the system shuts down. Voltage, when it is judged that the current lighting conditions meet the preset startup lighting requirements and the DC voltage of the photovoltaic inverter system meets the preset startup voltage requirements, timely control the startup of the energy storage inverter system in the optical storage micro-grid system to establish the main grid, The photovoltaic inverter system is connected to the grid for power generation, that is, it can automatically select the start-up timing of the photovoltaic storage microgrid system according to the corresponding collected information in the photovoltaic storage microgrid system, compared with the prior art that only uses manual intervention to restart In this way, the startup timing obtained by the present invention is more reasonable and well-founded, so as to improve the success probability of restarting as much as possible.
Description
technical field [0001] The invention relates to the field of control technology, in particular to an optical storage micro-grid system and a self-starting method thereof. Background technique [0002] As a sustainable, clean and efficient energy generation technology, solar photovoltaic power generation can solve the problem of independent power supply in areas without electricity in western my country, remote mountainous areas, islands, etc., so it has been widely used in my country. For medium and large-scale (tens of kilowatts to tens of megawatts) off-grid power supply needs, an AC bus-type solar-storage off-grid micro-grid system composed of a grid-connected photovoltaic inverter system and an off-grid energy storage inverter system , referred to as the optical storage micro-grid system, is widely used because of its convenient expansion and flexible power configuration. [0003] The main network of the photovoltaic storage microgrid system is established by the energy...
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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/32Y02E70/30Y02E10/56
Inventor 孙德亮张彦虎邹绍琨周辉
Owner HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD