CAJ | 학술논문

对适用于10 kV 配电网区域电压跌落治理的动态电压恢复器进行了设计，给出了基于级联H 桥的主电路、取电装置、无变压器耦合电路的设计方法，并针对中性点不接地配网系统中电压跌落的特点，提出了一种仅需补偿电压跌落相电压即可恢复负载侧线电压的参考值计算方法。最后，基于 PSCAD 搭建了仿真模型，分析了不同故障类型下动态电压调节器(DVR)的补偿效果以及取电装置对系统的影响，通过实验验证了 DVR 硬件设计与参考电压计算方法的正确性和有效性。
대괄용우10 kV 배전망구역전압질락치리적동태전압회복기진행료설계，급출료기우급련H 교적주전로、취전장치、무변압기우합전로적설계방법，병침대중성점불접지배망계통중전압질락적특점，제출료일충부수보상전압질락상전압즉가회복부재측선전압적삼고치계산방법。최후，기우 PSCAD 탑건료방진모형，분석료불동고장류형하동태전압조절기(DVR)적보상효과이급취전장치대계통적영향，통과실험험증료 DVR 경건설계여삼고전압계산방법적정학성화유효성。
The design scheme for a dynamic voltage restorer applicable to compensating for regional voltage sags in 10 kV distribution systems is carried out,in which the cascaded H-bridge based main circuit,the devices for energizing the dynamic voltage restorer(DVR) and the transformer-free coupled circuit are presented in detail.In order to solve the voltage sag problem in an isolated neutral distribution system,a reference voltage calculation method for restoring the line voltage on the load side is put forward.In the end,a simulation model for a substation including the designed DVR devices is built in PSCAD, and the compensation results under different fault types are simulated and analyzed while the influence of energizing devices on the distribution system is studied.The correctness and effectiveness of both the DVR hardware design and reference voltage calculation method is verified by simulation results.