New-energy power generator grid-connection system

Abstract

The invention discloses a new-energy power generator grid-connection system comprising a new-energy power generator. The new-energy power generator is connected with a load through a bus and powers the same. The bus is connected with an external grid through a main breaker. The input end of the external grid is provided with a grid voltage sensor. The bus is provided with a bus voltage sensor. The grid voltage sensor and the bus voltage sensor are both connected to a central processing unit. The central processing unit is connected with the main breaker through a master controller control module. The load, gas power generation and a photovoltaic generation branch can be flexibly controlled, the modes such as grid-connected operation and wheeling operation are guaranteed, a transistor is used as a grid connection device after the system is in sync with the power grid, low impact and high reliability are ensured for synchronous grid connection, a power checking mode is provided, penalty paid for an excessively low grid-connected operation power factor is avoided, photovoltaic generated power is utilized as far as possible according to actual conditions to provide power, utilization efficiency of energy is increased, energy is saved, and emission is decreased.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation, and relates to a grid-connected access system for new energy power generation devices. Background technique [0002] Coal mine gas refers to unconventional natural gas stored in coal seams. The main component is methane. Coal mine gas is divided into high-concentration (referring to concentration greater than 30%) gas and low-concentration gas (referring to concentration below 30%). The amount of gas emitted during coal mine operations is relatively high, and it is easy to cause gas explosions in case of fire, threatening the personal and property safety of coal mines. It is one of the greenhouse gases emitted by the industry, which aggravates the pollution of the air environment; on the other hand, from the perspective of comprehensive energy utilization, coal mine gas is a kind of available gas, and the emission without use will waste a lot of high-quality energy in vain. T...

AI Technical Summary

Problems solved by technology

The amount of gas emitted during coal mine operations is relatively high, and it is easy to cause gas explosions in case of fire, threatening the personal and property safety of coal mines. It is one of the greenhouse gases emitted by the industry, which aggravates the pollution of the atmospheric environment; on the other hand, from the perspective of comprehensive energy utilization, coal mine gas is a usable gas, and the emission without use will waste a lot of high-quality energy in vain

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