一种基于IGBT晶体管智能投切的补偿电路

Research on a Compensation Circuit based on Intelligent Switching of IGBT Transistor

智能电网在电能传输和补偿负荷用电需求方面,具备电流稳定和电能容量可控的功能。传统的负荷补偿电路设计采用电容器组和电抗器结合的模式,满足电能波动小和损耗补偿快的特点,其缺点是容易受采集参数的变化而无法快速控制电流。基于IGBT晶体管具有反向截断过电流的效果,同时能抑制过电压。在补偿电路中增加IGBT晶体管组具有实用的控制效果。在电路运行满足负荷电能运行时,IGBT晶体管组作为检测电流与触发开关保护的双重作用,自动投切电容器组对负荷用电损耗进行无功补偿。在分析智能无功补偿装置的结构和原理基础上,通过Matlab仿真证明补偿电路中增加IGBT晶体管具备抑制电流和保护补偿电路的作用。

In terms of power transmission and compensation of load power demand,smart grid has the function of stable current and controllable power capacity.The traditional design of load compensation circuit uses a combination of capacitor banks and reactors to meet the characteristics of small power fluctuations and fast loss compensation.Its disadvantage is that it is easily affected by changes in acquisition parameters and cannot quickly control the current.Since the IGBT transistor has the effect of blocking the over-current in the reverse direction and can suppress the over-voltage at the same time,adding IGBT transistor group in the compensation circuit has a practical control effect.When the circuit operation meets the requirements of load power operation,IGBT transistor group acts as a dual function of detecting current and triggering switch protection,and automatic switching capacitor bank for reactive power compensation of load power consumption loss.Based on the analysis of the structure and principle,Matlab Simulation proved that adding IGBT transistor in the compensation circuit has the function of unidirectional conduction and protection compensation circuit.