Line voltage compensation system based on power supply of energy storage module and inverter

Abstract

The invention discloses a line voltage compensation system based on the power supply of an energy storage module and an inverter. The system comprises a compensation inverter module, a compensation transformer, an energy storage and conversion module and an integrated control communication module. According to the invention, amplitude and phase controllable voltage is generated through the compensation inverter module and is injected into the power transmission line to realize full-phase voltage compensation. The system is used in combination with an SVG device with reactive, harmonic and three-phase imbalance compensation functions, the voltage and electric energy quality comprehensive compensation of a distribution line can be realized, and the power supply radius is effectively extended; according to the invention, an energy storage and conversion module is designed to be connected in parallel to a power supply line in order to limit a direct-current side energy source widely applied to the controllable series compensation device; the adjustment of peak-valley load balance of a power grid can be realized, and a circuit can also be used as an energy extraction circuit of the compensation inverter module to provide stable and sufficient energy source support for a voltage compensation process.

Description

technical field [0001] The invention relates to the field of power supply or power distribution, in particular to a line voltage compensation system powered by an energy storage module and an inverter. Background technique [0002] Poor economic benefits and low input-output ratio of power grid construction in areas with scattered loads are common problems faced by power grid companies all over the world. How to provide suitable power supply services for the population in areas with scattered loads in a more economical way has become a worldwide hot topic . With the gradual development and construction of new energy power plants in Inner Mongolia, Gansu, Xinjiang and coastal areas of China, wind power and photovoltaic power generation have become a new environmentally friendly energy supply solution advocated by the society. The absorptive capacity leads to the limitation of the practical application of the distributed power generation system and the phenomenon of "abandoni...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a line voltage compensation system based on energy storage module and inverter power supply, which is used to solve the problem of large energy demand in the voltage compensation process, and has the function of adjusting load peak-valley balance

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