摘要
混合潮流控制器(hybrid power flow controller,HPFC)结合无源移相变压器(phase shifting transformer,PST)以及有源的级联H桥型换流器(cascaded H-bridge converter,CHB)的优势,实现对线路潮流的大范围柔性连续调节,可以有效解决电网潮流分布不均以及新能源外送通道受阻等问题。为解决串入系统运行的HPFC影响原始线路配置的纵联保护的问题。从HPFC的拓扑出发,推导得到了其稳态及三序数学模型。在此基础上,分析了HPFC的接入对纵联差动保护以及工频变化量方向保护动作的影响,并仿真分析了纵联保护在含HPFC线路的适应性。研究发现,HPFC接入对纵联差动保护影响较大,而对方向元件测量影响较小,在实际工程中宜使用线路侧互感器构造纵联保护。
The hybrid power flow controller(HPFC),integrating the advantages of the passive phase shifting transformer(PST)with the active cascaded H-bridge converter(CHB),delivers flexible and continuous regulation of line power flows.This advanced technology effectively mitigates challenges such as uneven power flow distribution and constraints in renewable energy transmission corridors.As the series-connected HPFC in operation affects the original line configuration of the transmission line,to address this issue,the paper derives the steady-state and three-sequence mathematical models of the HPFC starting from its topology.Based on this,the impact of the HPFC integration on the performance of longitudinal differential protection and power frequency directional protection is thoroughly analyzed.Simulation analyses have been conducted on the adaptability of longitudinal protection in lines with the HPFC.The study found that the HPFC significantly impacts longitudinal differential protection but has a lesser effect on directional element measurement.In practical engineering,it is advisable to use line-side transformers to establish longitudinal protection.
作者
范登博
郝治国
高旭
张千玮
王晓斐
FAN Dengbo;HAO Zhiguo;GAO Xu;ZHANG Qianwei;WANG Xiaofei(State Grid Jibei Electric Power Co.,Ltd.,Beijing 100053,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China)
出处
《电网与清洁能源》
北大核心
2025年第7期44-52,共9页
Power System and Clean Energy
基金
陕西省重点研发计划项目(2022GXLH-01-06)
国网冀北电力有限公司科技项目(SGTYHT/23-JS-001)。
关键词
移相变压器
级联H桥
混合潮流控制器
纵联差动保护
工频变化量方向保护
phase-shifting transformer
cascaded H-bridge
hybrid power flow controller
longitudinal differential protection
power frequency variation directional protection
