电力与能源
電力與能源
전력여능원
Power and Energy
2014年
3期
305-310
,共6页
于光涛%李刚%侯昆明%唐宏臻%郭启伟
于光濤%李剛%侯昆明%唐宏臻%郭啟偉
우광도%리강%후곤명%당굉진%곽계위
直流输电系统%交流电网等值%换相失败%单相接地故障%技术分析
直流輸電繫統%交流電網等值%換相失敗%單相接地故障%技術分析
직류수전계통%교류전망등치%환상실패%단상접지고장%기술분석
HVDC%AC grid equivalent%Commutation failure%Single-phase-to-ground-fault%Technical analysis
以±660 kV银东直流输电系统为研究对象，根据其实际工程参数，利用PSCAD/EMTDC仿真工具，搭建直流输电系统模型。采用仿真软件PSASP对逆变侧山东电网进行等值建模。在介绍直流输电系统换相失败及交流输电系统单相接地的基础上，对青岛换流站发生单相接地故障时的银东直流输电系统的运行状况进行仿真分析。结合数学推导和仿真结果，分析了换向失败的机理和各种原因，提出了提前发触发脉冲和增大超前触发角来减少换相失败的措施，为直流输电系统的安全和稳定运行提供了技术支撑。
以±660 kV銀東直流輸電繫統為研究對象，根據其實際工程參數，利用PSCAD/EMTDC倣真工具，搭建直流輸電繫統模型。採用倣真軟件PSASP對逆變側山東電網進行等值建模。在介紹直流輸電繫統換相失敗及交流輸電繫統單相接地的基礎上，對青島換流站髮生單相接地故障時的銀東直流輸電繫統的運行狀況進行倣真分析。結閤數學推導和倣真結果，分析瞭換嚮失敗的機理和各種原因，提齣瞭提前髮觸髮脈遲和增大超前觸髮角來減少換相失敗的措施，為直流輸電繫統的安全和穩定運行提供瞭技術支撐。
이±660 kV은동직류수전계통위연구대상，근거기실제공정삼수，이용PSCAD/EMTDC방진공구，탑건직류수전계통모형。채용방진연건PSASP대역변측산동전망진행등치건모。재개소직류수전계통환상실패급교류수전계통단상접지적기출상，대청도환류참발생단상접지고장시적은동직류수전계통적운행상황진행방진분석。결합수학추도화방진결과，분석료환향실패적궤리화각충원인，제출료제전발촉발맥충화증대초전촉발각래감소환상실패적조시，위직류수전계통적안전화은정운행제공료기술지탱。
In this paper,we focus on the ±660 kV Yindong HVDC system and the detailed model of it is built using simulation tool PSCAD/EMTDC based on its real parameters.Equivalent model of Shandong power grid system at inverter side is also conducted using simulation software PSASP.Thus,the HVDC commutation failure and single-phase-to-ground fault at AC side are introduced.On this basis,the dynamic characteristics of Yindong HVDC system under single-phase-to-ground fault at Qingdao converter station are simulated and ana-lyzed.According to the results of mathematical derivation and simulation analysis,the various influencing fac-tors of Yindong HVDC system commutation failure are concluded,and a mitigation measures for commutation failure under this kind of fault that to emit the trigger pulse in advance and increase the advance firing angle is proposed.This study provides technical support for safe and stable operation of Yindong HVDC system.
