Kumar Pradeep, Kumar Niranjan, Akella A K
Department of Electrical Engineering, National Institute of Technology Jamshedpur, Jharkhand 831014, India.
Department of Electrical Engineering, National Institute of Technology Jamshedpur, Jharkhand 831014, India.
ISA Trans. 2014 May;53(3):767-75. doi: 10.1016/j.isatra.2013.11.008. Epub 2014 Mar 19.
This paper presents a distribution static compensator (DSTATCOM) for power quality improvements in terms of harmonics and power factor correction in a three-phase four-wire distribution system. The DSTATCOM is implemented with PWM current controlled six-leg voltage source converter (VSC) and the switching patterns are generated through a novel synchronous reference frame controller (SRFC). The insulated gate bipolar transistor (IGBT) based VSC is supported by a capacitor and is controlled for the required compensation of the load current. The DSTATCOM is connected to the power system feeding nonlinear loads. Nonlinear loads include either current-source type or voltage-source type. Harmonic spectrum of the source current is compared in between without DSTATCOM and with DSTATCOM by considering both types of nonlinear loads. The SRFC based DSTATCOM system is validated through extensive simulation for diode-rectifier and unbalanced R-L loads with a case study.
本文提出了一种用于三相四线配电系统中改善电能质量（包括谐波治理和功率因数校正）的配电静止无功补偿器（DSTATCOM）。该DSTATCOM采用脉宽调制（PWM）电流控制的六桥臂电压源变流器（VSC）实现，其开关模式通过一种新型同步旋转坐标系控制器（SRFC）生成。基于绝缘栅双极型晶体管（IGBT）的VSC由一个电容器支撑，并针对负载电流的所需补偿进行控制。DSTATCOM连接到为非线性负载供电的电力系统。非线性负载包括电流源型或电压源型。通过考虑这两种类型的非线性负载，比较了无DSTATCOM和有DSTATCOM时电源电流的谐波频谱。基于SRFC的DSTATCOM系统通过对二极管整流器和不平衡R-L负载的广泛仿真以及一个案例研究进行了验证。
