A Unified Topology of Three-level SPQC with Neutral Point Oscillation Reduction Methods

doi:10.14044/j.1674-1757.pcrpc.2021.06.023

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A Unified Topology of Three-level SPQC with Neutral Point Oscillation Reduction Methods

更新时间：2024-09-14

- A Unified Topology of Three-level SPQC with Neutral Point Oscillation Reduction Methods
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 6, Pages: 158-165(2021)
- 作者机构：
  
  电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系)
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.06.023
  CLC： TM711
- Published：2021，
- 稿件说明：
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A Unified Topology of Three-level SPQC with Neutral Point Oscillation Reduction Methods. [J]. Power capacitor & reactive power compensation, 2021, 42(6): 158-165.
DOI：

A Unified Topology of Three-level SPQC with Neutral Point Oscillation Reduction Methods. [J]. Power capacitor & reactive power compensation, 2021, 42(6): 158-165. DOI： 10.14044/j.1674-1757.pcrpc.2021.06.023.

摘要

三电平并联型电能质量调节器(shunt power quality controller

SPQC)可集中治理三相四线制配电系统中多种由谐波电流引发的电能质量问题。三桥臂与四桥臂二极管中点箝位(neutral point clamped

NPC)拓扑作为主流方案得到了广泛应用

但缺乏不同场景下合理选择的结论。提出一种统一拓扑

可用于指导不同拓扑的参数优化

并实现补偿性能的定量比较。三电平结构固有的中点电位振荡问题严重影响装置的硬件安全与补偿效果

对不同分立拓扑分别改进脉宽调制(pulse width modulation

PWM)策略

在每个开关周期时间尺度内最大限度抑制中性点电位振荡

替代了传统控制策略的附加均压环。最后

仿真验证了理论结果与改进策略的有效性。

Abstract

Three-level shunt power quality controller（SPQC）can be used to solve a variety of shunt power quality problems in three-phase four wire distribution system intensively. Three-leg and four-leg neutral point clamped（NPC）topologies have been widely used as the mainstream scheme but with the lack of reasonable choice in different scenarios. A unified topology is proposed

which can be used to guide the parameter optimization of different topologies

and realize the quantitative comparison of compensation performance. The inherent neutral point potential oscillation of three-level structure seriously affects the hardware security and compensation effect of the device. For different discrete topologies

the pulse width modulation（PWM）strategy is improved to minimize the neutral point potential oscillation in the time scale of each switching cycle

instead of the additional voltage balancing loop in the traditional control strategies.Finally

the simulation results verify the effectiveness of the theoretical results and the improved strategies.

关键词

三电平SPQC统一拓扑中性点振荡抑制电能质量三相四线制

Keywords

three-level SPQCunified topologyneutral point oscillation reductionpower qualitythree-phase four-wire system

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Related Institution

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