电力系统自动化
電力繫統自動化
전력계통자동화
Automation of Electric Power Systems
2015年
21期
52-58
,共7页
王晨清%宋国兵%迟永宁%刘凯%申全宇%汤海雁
王晨清%宋國兵%遲永寧%劉凱%申全宇%湯海雁
왕신청%송국병%지영저%류개%신전우%탕해안
风电系统%故障特征%低电压穿越%测试数据%仿真%现场故障录波
風電繫統%故障特徵%低電壓穿越%測試數據%倣真%現場故障錄波
풍전계통%고장특정%저전압천월%측시수거%방진%현장고장록파
wind power system%fault characteristics%low-voltage ride through (LVRT)%test record data%simulation%field fault record data
故障特征分析是继电保护研究的基础,文中旨在通过风电机组的受控特性并结合电力电子器件的特点,揭示风电电源对电网故障响应的电气量特征,为现阶段研究含风电系统的继电保护奠定基础。文中首先从风电机组的结构出发,分析了影响风电电源故障特征的因素;然后通过对风电机组受控特性分析,并结合单台风电机组低电压穿越测试数据,给出风电电源受控下的故障特征;最后通过风电场电磁暂态仿真模型下的故障数据和现场故障录波数据,验证了所给出的一般故障特征。研究结果表明,风电电源在控制作用下和在电力电子自身特点限制下,具有弱馈、谐波、频率偏移和电源阻抗不稳定等特征。
故障特徵分析是繼電保護研究的基礎,文中旨在通過風電機組的受控特性併結閤電力電子器件的特點,揭示風電電源對電網故障響應的電氣量特徵,為現階段研究含風電繫統的繼電保護奠定基礎。文中首先從風電機組的結構齣髮,分析瞭影響風電電源故障特徵的因素;然後通過對風電機組受控特性分析,併結閤單檯風電機組低電壓穿越測試數據,給齣風電電源受控下的故障特徵;最後通過風電場電磁暫態倣真模型下的故障數據和現場故障錄波數據,驗證瞭所給齣的一般故障特徵。研究結果錶明,風電電源在控製作用下和在電力電子自身特點限製下,具有弱饋、諧波、頻率偏移和電源阻抗不穩定等特徵。
고장특정분석시계전보호연구적기출,문중지재통과풍전궤조적수공특성병결합전력전자기건적특점,게시풍전전원대전망고장향응적전기량특정,위현계단연구함풍전계통적계전보호전정기출。문중수선종풍전궤조적결구출발,분석료영향풍전전원고장특정적인소;연후통과대풍전궤조수공특성분석,병결합단태풍전궤조저전압천월측시수거,급출풍전전원수공하적고장특정;최후통과풍전장전자잠태방진모형하적고장수거화현장고장록파수거,험증료소급출적일반고장특정。연구결과표명,풍전전원재공제작용하화재전력전자자신특점한제하,구유약궤、해파、빈솔편이화전원조항불은정등특정。
In order to lay the research foundation for the protection relay in the wind power integration,this paper analyzes general fault characteristics of wind power system based on the controlled characteristics of wind turbine generators and the features of power electronic devices.The fault characteristics of wind power system are determined by the source and the network topology.The influence factors of wind power source are first analyzed based on the structure of wind turbine generator.Then,depending on the control theory of wind power,the general fault characteristics of wind power source are studied with the test data of a single wind turbine generator in the low-voltage ride through (LVRT) process.Finally the general fault characteristics are verified by wind power system simulation and field fault record data.The research results reveal that under the control effect and the limit of power electronics,the wind power source has the fault characteristics of weak feedback,high harmonics,frequency deviated,and unstable source impedance.