Abstract This paper presents a control algorithm, based on consumer-generated voltage imbalance assessment, for a distribution static synchronous compensator (DSTATCOM). The proposed algorithm quantifies, in the time-domain, the parcels of voltage unbalance due to the supplier (utility) and consumer using measurements of the instantaneous voltages and currents at the point of common coupling. Small-signals models are derived and used to design the controllers for the DSTATCOM in order to compensate for the negative and zero sequence voltages caused by the consumer. These controllers are designed in the synchronous reference frame, with two inner current loops and two outer voltage loops for each compensated sequence, to ensure the DSTATCOM tracks the reference voltages generated by the unbalance assessment algorithm. Digital simulation results obtained with an unbalanced distribution network are used to validate the proposed methodology. Through the comparison of the results obtained with and without the proposed unbalance assessment algorithm it is possible to conclude that the capacity of the compensator can be significantly reduced when only the unbalanced voltage parcel caused by the load is compensated.

中文翻译：

---

DSTATCOM 补偿用户产生的负序和零序电压不平衡的控制算法

摘要 本文提出了一种基于用户产生的电压不平衡评估的配电静态同步补偿器 (DSTATCOM) 控制算法。所提出的算法在时域中使用公共耦合点处的瞬时电压和电流的测量来量化由于供应商（公用事业）和消费者造成的电压不平衡部分。导出小信号模型并用于设计 DSTATCOM 的控制器，以补偿由用电设备引起的负序和零序电压。这些控制器在同步参考系中设计，每个补偿序列具有两个内部电流回路和两个外部电压回路，以确保 DSTATCOM 跟踪不平衡评估算法生成的参考电压。使用不平衡配电网络获得的数字仿真结果用于验证所提出的方法。通过比较使用和不使用所提出的不平衡评估算法获得的结果，可以得出结论，当仅补偿由负载引起的不平衡电压包时，补偿器的容量可以显着降低。