Method for correcting recursive error of power station data based on gateway meter of grid connection point of photovoltaic power station

Abstract

The invention discloses a method for correcting a recursive error of power station data based on a gateway meter of a grid connection point of a photovoltaic power station. The correction method is characterized in that different function relationships are established; by taking the gateway meter, with absolute precision of 0.2%, of the grid connection point of the photovoltaic power station as astandard, transformer measurement control data of the photovoltaic power station, collected by a power station monitoring system is subjected to deviation correction according to the function relationships; by taking a deviation correction value of the transformer measurement control data as a standard, collected inverter data is subjected to deviation correction; by taking a deviation correctionvalue of the inverter data as a standard, collected combiner box data of the photovoltaic power station is subjected to deviation correction; and the rest can be done in the same manner, until outputdata of an irradiation table is subjected to error inverse analysis and recursive correction layer by layer.

Description

technical field [0001] The invention relates to a power station data error correction method of a solar photovoltaic power generation system. Background technique [0002] With the rapid development of photovoltaics, the introduction of intelligent monitoring of power stations has greatly improved the level of safety, scientific management and maintenance of power stations, as well as the power generation efficiency of power stations. Through Internet remote data monitoring and big data analysis, the management of photovoltaic power plants is improved, all of which are supported by the reliability, authenticity and accuracy of a large number of on-site data. However, the reality is very different from the original intention of power plant intelligence. For example, for the same physical quantity, the values ​​reflected by the two devices are quite different: [0003] 1. The current at the input terminal of the inverter in the photovoltaic power station should be equal to th...

AI Technical Summary

Problems solved by technology

[0006] Due to the inconsistency and inaccuracy of the data, the non-standard analysis of the power station data cannot be carried out. As a result, the intelligent monitoring of the power station is useless, resulting in a great loss of resources

[0007] Based on the above phenomenon, if the existing power station is replaced by hardware equipment to solve the above problems, firstly, the investment will be large and time-consuming, and secondly, the cost will be high, which is equivalent to building a new power station, which is unrealistic

Images