CAJ | 학술논문

给出了交直流系统相互作用的简化模型，在此基础上介绍了短路比法、最大功率法和电压稳定性指标法，并以国内某在建±800 kV高压直流输电工程为研究对象，利用 PSCAD/EMTDC 仿真软件建立仿真模型，并进行双极全压启动跟逆变侧无功动态变化仿真。理论分析跟仿真结果均表明交流系统越强静态电压稳定性越好；逆变器采用定直流电压控制时交直流系统静态电压稳定性较好，通过跟其他控制方式的配合，可较准确地模拟实际±800 kV高压直流输电系统。
급출료교직류계통상호작용적간화모형，재차기출상개소료단로비법、최대공솔법화전압은정성지표법，병이국내모재건±800 kV고압직류수전공정위연구대상，이용 PSCAD/EMTDC 방진연건건립방진모형，병진행쌍겁전압계동근역변측무공동태변화방진。이론분석근방진결과균표명교류계통월강정태전압은정성월호；역변기채용정직류전압공제시교직류계통정태전압은정성교호，통과근기타공제방식적배합，가교준학지모의실제±800 kV고압직류수전계통。
This paper proposes a simplified model for interaction between alternative and direct current systems.Meanwhile, it introduces short circuit ratio method,maximum power method and voltage stability index method on the basis of the above model.Taking some domestic ±800 kV high voltage DC power transmission engineering as study object and using PSCAD/EMTDC simulation software to establish simulation model,it proceeds simulation on bipolar with full voltage startup and dy-namic change of reactive power in inverter side.Theoretical analysis and simulation result indicate that static voltage stabili-ty may be better with stronger AC system,static voltage stability of AC and DC current systems is better when using constant DC voltage control for the inverter.In addition,by coordinating with other control ways,it is able to be more correctly simulate practical ±800 kV high voltage DC power transmission system.