适用于农村电网的新型电压补偿装置设计

针对配电网尤其是农村电网和偏远地区供电线路末端的电压偏低问题,研究了一种基于交流脉宽调制技术的低电压补偿电路。该电路串联于供电线路中,在线路末端电压偏低时投入运行,可保证负载电压在允许范围内。该装置仅需补偿供电电压不足的部分,降低了对装置的容量要求,采用交流斩波方式使得电压调节范围宽且连续,同时装置自身无需储能元件,结...

Design for a Novel Low-voltage Compensation Device Fit for Rural Power Grid

A novel voltage regulator based on pulse width modulation(PWM) controlled AC chopper is proposed to solve the low voltage problem at the terminal of a distribution system,especially at the terminal of rural power network.Connected to the power supply line in series,the circuit starts up when the line voltage dropped and can maintain the load voltage within the acceptable range.The requirement on the capacity of this device is lowered since it only compensates for the insufficient part of the power supply line voltage.Based on AC chopper,the output voltage can be adjusted continuously within a wide range.The structure of this device is simple for its direct transfer of power from grid to load without the energy storage element.The topology and modulating method of the regulator are discussed in detail,and its application scope is studied.The accuracy and availability of this regulator are verified by both simulation and prototype results.