电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
17期
84-89
,共6页
分布式发电%高渗透率%控制模式%动态模型%暂态稳定%电压稳定
分佈式髮電%高滲透率%控製模式%動態模型%暫態穩定%電壓穩定
분포식발전%고삼투솔%공제모식%동태모형%잠태은정%전압은정
distributed generation%high penetration level%control mode%dynamic model%transient stability%voltage stability
为研究大规模逆变型分布式发电对电力系统暂态和电压稳定性的影响，借助PSCAD/EMTDC仿真软件，以一个12母线测试系统为研究对象，建立电力系统和逆变型DG的动态模型。通过暂态仿真和理论分析，重点研究了不同渗透率DG对主同步发电机最大转速偏差和转速偏离频率的影响，分析了不同控制模式的DG在故障前（稳态）、故障期间和故障后对母线电压的影响。研究结果表明：渗透率越高，逆变型DG对系统暂态稳定性的负作用越大，但电压控制的逆变型DG能明显改善系统电压的稳定性。
為研究大規模逆變型分佈式髮電對電力繫統暫態和電壓穩定性的影響，藉助PSCAD/EMTDC倣真軟件，以一箇12母線測試繫統為研究對象，建立電力繫統和逆變型DG的動態模型。通過暫態倣真和理論分析，重點研究瞭不同滲透率DG對主同步髮電機最大轉速偏差和轉速偏離頻率的影響，分析瞭不同控製模式的DG在故障前（穩態）、故障期間和故障後對母線電壓的影響。研究結果錶明：滲透率越高，逆變型DG對繫統暫態穩定性的負作用越大，但電壓控製的逆變型DG能明顯改善繫統電壓的穩定性。
위연구대규모역변형분포식발전대전력계통잠태화전압은정성적영향，차조PSCAD/EMTDC방진연건，이일개12모선측시계통위연구대상，건립전력계통화역변형DG적동태모형。통과잠태방진화이론분석，중점연구료불동삼투솔DG대주동보발전궤최대전속편차화전속편리빈솔적영향，분석료불동공제모식적DG재고장전（은태）、고장기간화고장후대모선전압적영향。연구결과표명：삼투솔월고，역변형DG대계통잠태은정성적부작용월대，단전압공제적역변형DG능명현개선계통전압적은정성。
In order to investigate the impacts of large scale DGs on the power system transient and voltage stability, the dynamic models of the power system and DGs in a 12-bus test system are modeled in detail by PSCAD/EMTDC software. And then through simulation and theory analysis, the impact of the DGs with different penetration level on the maximum rotor speed deviation and the rotor speed deviation frequency of the main synchronous generators are studied, and the impact of the DGs with different control models on the power system bus voltages, before a fault (steady state), during a fault and after a fault is analyzed. The research results show that the inverter interfaced DGs have a more negative impact on the power system transient stability with the penetration level increasing, but the voltage controlled inverter interfaced DGs significantly improve the voltage in the power system buses after fault clearances.
