An energy-saving distribution network low-voltage compensation device and method

Abstract

The invention discloses a low-voltage compensation device and method for an energy-saving distribution network. The device is divided into rectification part, inverter part and bypass unit; rectification part includes relay QF1, filter capacitor C1, AC reactance L1, IGBT tube G1, rectifier diode, photovoltaic panel; inverter part includes relay QF2, IGBT tube G2 , IGBT tube G3, inverter inductor L2, and filter capacitor C2; the bypass unit includes a bidirectional thyristor SCR; the series voltage compensation method is adopted to solve the low voltage problem of the distribution network, and the device only needs to provide part of the load power; the direct series connection without transformer is adopted The method avoids the loss and non-linear problems of the transformer; combined with photovoltaic power generation, the working mode is switched to solve the problem of too low voltage at the access point when multiple voltage regulating devices are running at the same time, and at the same time make full use of photovoltaic power generation to achieve energy saving and emission reduction. effect.

Description

technical field [0001] The invention belongs to the field of power electronic control, and relates to an energy-saving distribution network low-voltage compensation device and method. Background technique [0002] With the continuous development of the economy, the load of the distribution network has undergone tremendous changes. At the same time, with the use of new household appliances and new load equipment, many distribution networks have experienced heavy load problems. Due to the voltage drop caused by cables, the incoming line voltage of many users is lower than 220V, or even lower than 160V. For example, with the influence of the greenhouse effect, the weather in summer is getting hotter and hotter, and many users connect to air conditioners. However, in the hottest time of summer, a large number of air conditioners are connected, resulting in heavy loads and excessive incoming line voltage. Low, the air conditioner can't run at full power, or even won't run. Tran...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the low-voltage compensation problem of distribution network, and propose a new low-voltage compensation device and method for energy-saving distribution network, which can significantly improve efficiency, reduce volume and weight, and can solve the problem of multiple low-voltage compensation equipment at the same time. Simultaneous access to the problem of low voltage at the common connection point

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