A new hybrid power flow controller topology and control based on three-level NPC inverter

YANG Yongchun; CHEN Runzhi; CHEN Xuntong; DU Xiangyu; LI Shaoyan

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A new hybrid power flow controller topology and control based on three-level NPC inverter

更新时间：2026-06-04

- A new hybrid power flow controller topology and control based on three-level NPC inverter
- Vol. 45, Issue 6, (2026)
- 作者机构：
  
  1. 华北电力大学（新能源电力系统全国重点实验室）,河北,保定,071003
  2. 国网安徽省电力有限公司安庆供电公司,安徽,安庆,246000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM72
- Published：2026
- 稿件说明：
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YANG Yongchun, CHEN Runzhi, CHEN Xuntong, et al. A new hybrid power flow controller topology and control based on three-level NPC inverter[J]. 2026, 45(6).
DOI：

YANG Yongchun, CHEN Runzhi, CHEN Xuntong, et al. A new hybrid power flow controller topology and control based on three-level NPC inverter[J]. 2026, 45(6). DOI：

摘要

随着新能源大规模接入电网，潮流分布不均问题日益凸显，严重影响电网可靠性与灵活性，故急需能够提升电网潮流动态控制能力的手段。首先，文中针对线路潮流分布不均，需要频繁调控潮流的应用场景，提出一种基于三电平中点箝位（neutral point clamped

NPC）型逆变器的新型混合潮流控制器（hybrid power flow controller

HPFC），结合移相变压器（phase-shifting transformer

PST）大幅离散调节与三电平NPC小范围柔性调节的特点，实现对潮流大范围的精确控制。然后，理论分析PST与三电平NPC的工作原理，提出一种二者相协同的控制策略，并确定HPFC的整体运行方式与工作范围。最后，以220 kV双回线路为应用场景，在PSCAD/EMTDC平台仿真验证所提新型HPFC控制策略的有效性及其对潮流的控制能力。结果表明，所提新型HPFC能有效优化传统两电平电压源换流器（voltage source converter

VSC）输出谐波含量较高的缺陷，实现对潮流的大范围柔性控制，且针对目标潮流频繁变化的动态场景，HPFC也能快速精确地作出响应。

Abstract

With the large-scale integration of new energy into the power grid

the problem of uneven distribution of power flow is prominent

seriously affecting the reliability and flexibility of the power grid. Therefore

there is an urgent need for means to improve the power grid dynamic control capability of power flow. Firstly

a new hybrid power flow controller (HPFC) based on a three-level neutral point clamp (NPC) inverter is proposed in this paper

combined with a phase-shifting transformer (PST) large discrete adjustment and three-level NPC small-range flexible adjustment to achieve precise control of large-scale power flow. Secondly

the working principles of PST and three-level NPC are theoretically analyzed

a control strategy for synergy between the two is proposed

and the overall operation mode and working scope of HPFC are determined. Finally

taking the 220 kV double-circuit line as the application scenario

the effectiveness of the proposed new HPFC control strategy and its ability to control the power flow were verified through simulation on the PSCAD/EMTDC platform. The results show that the proposed new HPFC effectively optimizes the shortcomings of the traditional two-level voltage source converter (VSC) output with high harmonic content

it can achieve large-scale flexible control of power flow

and can also quickly and accurately respond to dynamic scenarios where the target power flow changes frequently.

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