Electric energy measuring system and method for grid-connected type wind-light combined power generation system

Abstract

The invention discloses an electric energy measuring system and a method for a grid-connected type wind-light combined power generation system. The electric energy measuring system comprises a photovoltaic array and a wind power generation array, wherein each output end of the photovoltaic array is respectively communicated with an input end of a corresponding inverter; the output end of the inverter is communicated with the input end of a box type transformer; each output end of the wind power generation array is respectively communicated with the input end of the corresponding box type transformer; the output end of the box type transformer is communicated with the input end of a coil cabinet of a booster station; the output end of the booster station is communicated with a public supply network of an opposite terminal transformer substation; a branch electric energy meter and a voltage current transformer are arranged between each box type transformer and the coil cabinet of the booster station; output ends of the branch electric energy meter and the voltage current transformer are connected with a collecting terminal; a gateway electric energy meter and the voltage current transformer are arranged in the coil cabinet of the opposite terminal transformer substation; the output ends of the gateway electric energy meter and the voltage current transformer are connected with the collecting terminal; the output end of the collecting terminal is communicated with a master control server.

Description

technical field [0001] The invention relates to the technical field of electric energy metering, in particular to an electric energy metering system and method for a grid-connected wind-solar combined power generation system. Background technique [0002] In recent years, under the background of the depletion of traditional fossil energy and the increasingly prominent environmental problems, it has become the general trend to vigorously develop renewable energy such as solar energy and wind power. It has the characteristics of intermittent and fluctuating, and it is difficult for a single wind power or photovoltaic power generation to make up for the above characteristics. In some areas of my country with better lighting conditions and wind energy resources, solar energy and wind energy can complement each other in timing and keep the output power stable. , therefore, it is of great significance to realize large-scale wind-wind combined power generation. [0003] An important...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an electric energy metering system and method for a grid-connected wind-solar combined power generation system in order to overcome the above-mentioned shortcomings. Unified metering with photovoltaic power generation saves a lot of equipment such as transformers, circuit breakers and wires, greatly saves engineering investment, accurately measures grid-connected electricity, and promotes the rational use of large-scale wind and solar renewable resources

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