计及高压隔离开关设备的UHVDC系统FTA评估  

FTA of UHVDC system including high-voltage disconnectors

作　　者：李生虎[1] 华玉婷[1] 董王朝 于丽萍[1] LI Shenghu HUA Yuting DONG Wangchao YU Liping(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009 ,Chin)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电力自动化设备》2017年第1期74-80,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51277049)~~

摘　　要：根据特高压直流输电(UHVDC)系统实际结构建立了横向和纵向故障树分析(FTA)模型,分析了2种模型的差异,基于此构造计及高压隔离开关设备的UHVDC系统FTA模型。采用模块分解法、改进的最小路集(MPS)法解决FTA的非确定多项式(NP)问题。求取了UHVDC可靠性指标。算例分析结果表明:采用所提方法后,FTA的计算量明显降低;与横向建模相比,纵向建模时双极故障、1/2单极运行的概率和故障频率较低、持续时间较短,等效停运小时数较低,能量可用率较高;隔离开关对系统双极故障、单极停运影响最明显,接地开关对其他运行方式影响最明显;旁路开关对1/2双极运行和3/4双极运行有影响;直流转换开关仅对双极故障有明显的影响。The horizontal and vertical FTA（Fault Tree Analysis） models are established according to the actual structure of UHVDC（Ultra High Voltage Direct Current） and the difference between two models is analyzed,based on which,the FTA models including the high-voltage disconnectors are built. The modular decomposition and the improved MPS（Minimal Path Set） method are applied to solve the NP（Nonde- terminstic Polynomial） problem of FTA. The reliability indices of UHVDC are calculated. The results of case study show that,the computing load of the proposed method for FTA is obviously reduced;for the bipolar outage and 1/2 monopolar operating modes,the vertical FTA model has lower probability and frequency,shorter duration and equivalent outage hours and higher energy availability than the horizontal FTA model;the disconnctor has obvious influence on the bipolar outage and monopolar outage operating modes while the grounding switch on other operating modes;the bypass switch has influence on the 1/2 bipolar and 3/4 bipolar operating modes;the DC transfer switches has influence on the bipolar outage operating mode.

关 键 词：特高压直流输电 高压隔离开关设备 故障树分析 最小路集 可靠性 

分 类 号：TM721.1[电气工程—电力系统及自动化]