Model parameter identification method for photovoltaic plant
A photovoltaic power station and identification method technology, applied in the field of identification of photovoltaic power station model parameters, can solve problems affecting the safe, stable and economical operation of the power system, and achieve high simulation accuracy
Active Publication Date: 2012-07-18
云南电力试验研究院(集团)有限公司
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Problems solved by technology
[0002] Photovoltaic power generation is volatile and intermittent, and the grid-connected operation of large-scale photovoltaic power plants will affect the safe, stable and economical operation of the power system
At present, there is no report on the model parameter identification using the actual operation data of photovoltaic power and the field test data of the inverter.
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[0032] A photovoltaic power station model parameter identification method, the present invention is characterized in that the steps of the identification method include:
[0033] A. Divide the photovoltaic power plant model into two identification links: outer loop control and inner loop control. Outer loop control parameter identification, identification of photovoltaic module maximum power operating point parameters, maximum power point tracking (MPPT) control parameters; inner loop control parameter identification , used to identify the dynamic tracking control parameters of the inverter;
[0034] B. Preprocessing the input source data of the photovoltaic power station: when the outer loop control parameters are identified, the input data comes from the actual operating data of the photovoltaic power station. The operating data should be screened to remove the wrong data, and then add the qualified data to the identification Database; when the inner loop control parameters ...
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The invention discloses a model parameter identification method for a photovoltaic plant. The method comprises the steps that the identification of a model of the photovoltaic plant is divided into an outer ring control identification link and an inner ring control identification link, wherein during outer ring control parameter identification, input data of the photovoltaic plant comes from practical operation data of the photovoltaic plant; and during inner ring control parameter identification, input data of the photovoltaic plant comes from test data of a field test of an inverter of the photovoltaic plant. A least square method is adopted during inner ring control parameter identification, and a combinatorial optimization identification method is adopted during outer ring control parameter identification. Through identifying parameters of the model of the photovoltaic plant, data of a practical maximum power operation point of a photovoltaic component and key control parameters of the inverter can be obtained, so that the established simulation model of the photovoltaic plant has high simulation precision and further approximates to the practical operation state of the photovoltaic plant.
Description
technical field [0001] The invention belongs to the field of new energy applications and relates to a method for identifying model parameters of a photovoltaic power station. Background technique [0002] Photovoltaic power generation is volatile and intermittent, and the grid-connected operation of large-scale photovoltaic power plants will affect the safe, stable and economical operation of the power system. Identifying the parameters of the photovoltaic power station model will help the power grid planning department to accurately analyze the impact of large-scale photovoltaic power station access on the power grid, facilitate the coordination and coordination of conventional power sources and photovoltaic power stations, adjust the scheduling plan in a timely manner, and reasonably arrange the operation mode of the power grid . On the one hand, it can effectively reduce the adverse impact of photovoltaic access on the power grid and improve the safety and stability of p...
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Login to View More IPC IPC(8): H02N6/00H02S50/00
CPCY02E10/50
Inventor 严玉廷苏适张林山
Owner 云南电力试验研究院(集团)有限公司