Analysis method of voltage feedforward control photovoltaic power generation considering coupling
A photovoltaic power generation, voltage feedforward technology, 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: 2019-09-17
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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[0078] 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.
[0079] like figure 1 As shown, in this embodiment, an analysis method considering coupled voltage feed-forward control of photovoltaic power generation includes the following steps:
[0080] S1. Establish an equivalent model of photovoltaic power generation system;
[0081] S2. Carry out the analysis of grid-connected control of photovoltaic power generation system based on voltage feedforward control considering coupling;
[0082] S3. Based on the equivalent model of the photovoltaic power generation system of S1 and combined with the analysis re...
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The invention discloses an analysis method of voltage feedforward control photovoltaic power generation considering coupling, which can solve the technical problem that the coupled resonance of multiple parallel grid-connected inverters of photovoltaic power generation directly affects the stable and safe operation of the power grid. The method includes the following steps: S1, establishing an equivalent model of the photovoltaic power generation system; S2, performing analysis of grid-connected control of the photovoltaic power generation system based on voltage feedforward control considering coupling; S3, based on the equivalent model of the photovoltaic power generation system in S1 and combined with analysis results in S2, establishing an equivalent model of grid-connected photovoltaic power generation model of voltage feedforward control considering coupling; S4, based on the equivalent model of the grid-connected photovoltaic power generation model, establishing a parallel grid-connected equivalent model of photovoltaic power generation dual inverter. According to the invention, the coupling between the inverter and the inverter, the inverter and the parallel inverter, the inverter and the power grid is calculated when the power grid is connected, the original model parameters is corrected proportionally, and the model factors are considered more comprehensively than other models, thus improving 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): H02J3/38G06F17/50
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