Ride-through strategies of thyristor controlled phase shifting transformer under grid faults

LI Peng

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Ride-through strategies of thyristor controlled phase shifting transformer under grid faults

更新时间：2025-10-16

- Ride-through strategies of thyristor controlled phase shifting transformer under grid faults
- Vol. 44, Issue 4, Pages: 128-137(2025)
- 作者机构：
  
  国网江苏省电力有限公司电力科学研究院,江苏,南京,211103
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM762
- Published：2025
- 稿件说明：
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LI Peng. Ride-through strategies of thyristor controlled phase shifting transformer under grid faults[J]. 2025, 44(4): 128-137.
DOI：

LI Peng. Ride-through strategies of thyristor controlled phase shifting transformer under grid faults[J]. 2025, 44(4): 128-137. DOI：

摘要

晶闸管控制型移相器（thyristor controlled phase shifting transformer

TCPST）是一种新型潮流控制设备，其串并联耦合拓扑及接入电网方式特殊，须考虑其在电网故障情况下的处理策略。文中基于TCPST的结构及原理，分析电网故障冲击对TCPST的影响，明确TCPST内部故障电流分布和过电流、过励磁特征。在此基础上，提出TCPST应对电网故障冲击的穿越控制策略，构建TCPST接入电网的故障状态识别判据和控制时序，通过电气特征量对TCPST区内外故障和电网故障恢复状态进行识别，实现TCPST故障退出时序及自动重启，通过TCPST暂时退出保护电网严重故障情况下的设备安全。对文中所提TCPST故障穿越策略开展仿真验证，结果表明该策略可实现TCPST在电网故障时的可靠穿越，有效提升TCPST可用率，保证其潮流调节作用得以充分发挥。

Abstract

Thyristor controlled phase shifting transformer (TCPST) is a new type of power flow control equipment. Due to its series and shunt coupling topology and special connection to the power grid

it is necessary to consider the handling strategy in case of power grid faults. Based on the structure and principle of TCPST

the influence of grid fault on TCPST is analyzed in this paper. It is clarified the distribution of fault current and characteristics of overcurrent and overexcitation within TCPST. On this basis

the control strategy of TCSPT for deal with grid fault impact is proposed

and the fault state identification criterion and control sequences for the TCPST is constructed. By identifying the faults within and outside the zone of TCPST and the recovery state of power grid faults with the electrical quantities

the out of service and auto-restart strategy for TCPST are realized. The temporarily withdraw method for TCPST is used to protect equipment safety in the event of severe power grid faults. Finally

some simulations are conducted for the proposed fault ride-through strategy of TCPST. It is shown that the reliable ride-through of TCPST during power grid faults can be achieved by using the strategy

which has a good application for feasibility and effectiveness of TCPST. It is benefit to take advantage of the potential of power flow regulation function of TCPST.

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