ABSTRACT

This paper presents a dual voltage source inverter (DVSI)-based Distributed Static Compensator (DSTATCOM) to enhance the power quality in the power utility system (PUS). The proposed DSTATCOM consists of two numbers of two-level voltage source inverters (VSI) which controls the reactive power. One of them is regarded as the main voltage source inverter (MVSI) and the other is considered as auxiliary voltage source inverter (AVSI). The icosϕ$i\cos \varphi$$i\cos \varphi$ control algorithm is employed to generate the reference source currents as well as switching pulses. The detailed control algorithm is formulated by mathematical analysis using MATLAB/Simulink, and compared with different case studies. Among all the theoretical findings, the DVSI offers better voltage regulation, voltage balancing, source current harmonic reduction and power factor correction under various loading scenarios. Apart from these, reliability, stress balancing of the both MVSI and AVSI, cost reduction due to a decrease in the filter size and better operation of PUS is obtained. To check the effectiveness, the performance of the DVSI-based DSTATCOM is carried out as per the benchmark value of the IEEE-519-2014 and IEC-61000-1 grid code.

摘要

本文提出了一种基于双电压源逆变器 (DVSI) 的分布式静态补偿器 (DSTATCOM)，以提高电力公用系统 (PUS) 中的电能质量。所提出的 DSTATCOM 由两个控制无功功率的两电平电压源逆变器 (VSI) 组成。其中一个被视为主电压源逆变器（MVSI），另一个被视为辅助电压源逆变器（AVSI）。这我因斯φ$我\mathrm{因斯}\phi$$i\cos \varphi$采用控制算法来生成参考源电流以及开关脉冲。使用MATLAB/Simulink进行数学分析，制定详细的控制算法，并与不同的案例进行比较。在所有理论研究结果中，DVSI 在各种负载情况下提供了更好的电压调节、电压平衡、源电流谐波减少和功率因数校正。除此之外，还获得了可靠性、MVSI 和 AVSI 的应力平衡、由于滤波器尺寸减小而导致的成本降低以及 PUS 的更好运行。为了检查有效性，根据 IEEE-519-2014 和 IEC-61000-1 电网规范的基准值对基于 DVSI 的 DSTATCOM 的性能进行了测试。