Verification method of parallel networking type photovoltaic power station power generation performance

Abstract

The invention discloses a method for verifying the power generation performance of a parallel photovoltaic power station, which comprises the following steps: collecting the solar irradiation grade G of the sensitive surface of a solar energy photovoltaic component and the temperature T of an internal photovoltaic cell at intervals; combining with the overall power of photovoltaic power station components PAS, a power irradiation grade coefficient C1 of the solar energy photovoltaic component and a power temperature coefficient C2, a direct current augmenting coefficient kd, inverter efficiency etaINV and an attenuation coefficient C3 of the solar energy photovoltaic component; calculating instantaneous generated power P according to the formula P = PAS*[1+(G-1)*C1]*[1+(T-25)*C2]*kd*etaINV*C3; respectively multiplying the interval time of data collection and adding to derive the theoretical measured generated electric energy in a period of time; comparing with the data of actual generated electric energy; and verifying and determining whether the generating performance of the parallel photovoltaic power station meets the contract, the design or the given requirements. The method can be widely applied to the construction quality verification and running management of the parallel photovoltaic power station.

Description

technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to a method for verifying the power generation performance of a grid-connected solar photovoltaic power station. Background technique [0002] As the supply of energy resources becomes increasingly tense and the environment worsens, the country's efforts to promote energy conservation and emission reduction continue to increase, and grid-connected solar photovoltaic power plants have been initially applied in China. [0003] The grid-connected photovoltaic power station converts solar radiation energy into direct current through several solar photovoltaic modules, which is converted into alternating current by a grid-connected inverter and then incorporated into the grid. The power generation performance of grid-connected photovoltaic power plants is the main technical parameter of photovoltaic power plants. At present, the single-chip solar photovoltaic modules ca...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the current inability to effectively express the power generation performance of grid-connected photovoltaic power plants under ever-changing environmental conditions, and unable to effectively verify and determine whether the actual power generation performance meets the requirements of the contract, design or regulations, provide A new verification method, by measuring and calculating the power generation under different environmental conditions, and comparing it with the actual power generation, to determine whether the actual power generation performance of the photovoltaic power plant meets the requirements of the contract, design or regulations