An Analytical Method for Voltage Feedforward Control of Photovoltaic Generation Considering Coupling
A technology of photovoltaic power generation and voltage feedforward, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve problems affecting the stable and safe operation of the power grid
Active Publication Date: 2020-10-13
中科海奥(黄山)储能科技有限公司
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[0004] The present invention proposes an analysis method considering coupling voltage feedforward control of photovoltaic power generation, which can solve the technical problem that the coupling resonance of multi-inverter parallel connection of photovoltaic power generation directly affects the stable and safe operation of the power grid
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[0079] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.
[0080] Such as figure 1 As shown, in this embodiment, an analysis method considering coupled voltage feed-forward control of photovoltaic power generation includes the following steps:
[0081] S1. Establish an equivalent model of photovoltaic power generation system;
[0082] S2. Carry out the analysis of grid-connected control of photovoltaic power generation system based on voltage feedforward control considering coupling;
[0083] S3. Based on the equivalent model of the photovoltaic power generation system of S1 and combined with the analysis...
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An analysis method of photovoltaic power generation with voltage feedforward control considering coupling can solve the technical problem that the coupling resonance of multi-inverter parallel connection of photovoltaic power generation directly affects the stable and safe operation of the power grid. It includes the following steps: S1. Establishing an equivalent model of a photovoltaic power generation system; S2. Carrying out an analysis of the grid-connected control of a photovoltaic power generation system based on voltage feedforward control considering coupling; S3. The equivalent model of a photovoltaic power generation system based on S1 combined with the Analyze the results and establish the equivalent model of the grid-connected photovoltaic power generation model considering the coupled voltage feedforward control; S4. Based on the equivalent model of the grid-connected photovoltaic power generation model of S3, establish the equivalent model of the photovoltaic power generation double inverter parallel connection grid-connected. The present invention calculates the coupling between the inverter and itself, the inverter and parallel inverters, and the inverter and the power grid when connecting to the grid, and corrects the original model parameters in proportion. Compared with other models, the factors of this model are considered more comprehensively , which improves the effectiveness of the model.
Description
technical field [0001] The invention relates to the technical field of inverter parallel connection and grid connection in a power system, and in particular to an analysis method for considering coupled voltage feedforward control of photovoltaic power generation. Background technique [0002] The large-scale use of renewable energy (such as photovoltaics, wind turbines, etc.) power generation equipment and its integration into the grid have brought new challenges to the stable operation of the power system. The coupling resonance of photovoltaic power generation multi-inverters connected in parallel directly affects the The stable and safe operation of the power grid. The phenomenon of mutual inductance in the inverter is complex, and there are different models under different installation methods, and there are different application occasions. However, the current multi-inverter parallel grid connection model is not completely suitable for the stability analysis of large-s...
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IPC IPC(8): H02J3/38
CPCH02J3/383G06F30/367H02J2203/20Y02E10/56
Inventor 王磊张凌博
Owner 中科海奥(黄山)储能科技有限公司