适用于高压直流输电受端系统的两阶段暂态电压评估方法  

Two-stage Transient Voltage Evaluation Suitable for HVDC Receiving Systems

作　　者：冉慧娟 王治钟 高本锋 甄永赞 丁雨晴 RAN Huijuan;WANG Zhizhong;GAO Benfeng;ZHEN Yongzan;DING Yuqing(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《电网技术》2023年第10期4272-4283,共12页Power System Technology

基　　金：国家重点研发计划项目“响应驱动的大电网稳定性智能增强分析与控制技术”(2021YFB2400800)。

摘　　要：直流受端系统受扰后,极易引起直流发生换相失败、直流闭锁等故障,使得直流受端系统的暂态电压稳定(transient voltage stability,TVS)问题尤为突出,量化评估直流受端系统暂态电压稳定性具有重要意义。由于直流系统复杂的暂态特性,使得现有的暂态电压评估方法难以准确评估直流系统的暂态电压问题。为此,基于现有的多二元表判据和直流系统暂态恢复特性,提出了两阶段暂态电压评估方法。首先,分析了直流系统的暂态电压恢复特性和现有多二元表在直流系统中的应用局限。其次,基于不同稳定性水平赋予不同权重的思想,提出两阶段暂态电压评估方法,结合直流控制参数和故障严重程度等信息,实现对暂态电压稳定性的评估。最后,基于双直流馈入系统和修改后含直流的IEEE 3机9节点系统验证两阶段暂态电压评估方法对直流系统的适用性,结果表明所提方法可以实现对直流受端系统暂态电压稳定的准确评估。After a DC receiver system disturbance,the DC commutation failure,the DC blocking or other failures may occur,causing the particularly prominent transient voltage stability(TVS)problem of the DC receiving system.Therefore,it is of great significance to quantitatively evaluate the transient voltage stability of the DC receiver system.Since the complex transient characteristics of the DC systems,it is difficult for the existing transient voltage evaluations to accurately evaluate the transient voltage problems of the DC systems.In view of this,based on the existing multiple two-element notation criterion and the DC system transient recovery characteristics,a two-phase transient voltage evaluation is proposed.Firstly,the transient voltage recovery characteristics of the DC systems and the application limitations of the existing multi-binary meters in the DC systems are analyzed.Secondly,based on the idea that different weights should be assigned to different stability levels,a two-stage transient voltage evaluation is proposed,and the transient voltage stability is evaluated by combining the DC control parameters with the fault severity.Finally,based on a dual DC feed system and the modified IEEE 3-machine 9-bus system with DC,the practicability of the two-stage transient voltage evaluation for the DC system is verified,and the results show that the method is able to accurately evaluate the transient voltage stability of the DC receiving system.

关 键 词：高压直流输电 暂态电压稳定 暂态特性 多二元表判据 

分 类 号：TM721[电气工程—电力系统及自动化]