电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
11期
45-50
,共6页
分布式电源%孤岛检测%电压/频率特性%SFS
分佈式電源%孤島檢測%電壓/頻率特性%SFS
분포식전원%고도검측%전압/빈솔특성%SFS
distributed generation%islanding detection%voltage/frequency dependence%Sandia Frequency Shift
针对目前孤岛研究中采用并联RLC负载模型不能准确评估孤岛检测实际性能的问题,提出含有电压频率特性的综合负载模型进行孤岛检测性能的评估,更加符合电力系统实际运行情况.对Sandia Frequency Shift(SFS)孤岛检测方法的性能进行了详细分析.理论分析表明负载有功电压频率特性会导致检测盲区发生改变、无功电压频率特性对系统频率变化的作用可以忽略、品质因数与检测盲区大小成正比关系.通过研究综合负载中与电压和频率相关的各参数对 SFS 检测盲区(Nondetection Zone,NDZ)的影响,为孤岛检测方法的实际应用提供理论依据.仿真结果验证了理论分析的正确性.
針對目前孤島研究中採用併聯RLC負載模型不能準確評估孤島檢測實際性能的問題,提齣含有電壓頻率特性的綜閤負載模型進行孤島檢測性能的評估,更加符閤電力繫統實際運行情況.對Sandia Frequency Shift(SFS)孤島檢測方法的性能進行瞭詳細分析.理論分析錶明負載有功電壓頻率特性會導緻檢測盲區髮生改變、無功電壓頻率特性對繫統頻率變化的作用可以忽略、品質因數與檢測盲區大小成正比關繫.通過研究綜閤負載中與電壓和頻率相關的各參數對 SFS 檢測盲區(Nondetection Zone,NDZ)的影響,為孤島檢測方法的實際應用提供理論依據.倣真結果驗證瞭理論分析的正確性.
침대목전고도연구중채용병련RLC부재모형불능준학평고고도검측실제성능적문제,제출함유전압빈솔특성적종합부재모형진행고도검측성능적평고,경가부합전력계통실제운행정황.대Sandia Frequency Shift(SFS)고도검측방법적성능진행료상세분석.이론분석표명부재유공전압빈솔특성회도치검측맹구발생개변、무공전압빈솔특성대계통빈솔변화적작용가이홀략、품질인수여검측맹구대소성정비관계.통과연구종합부재중여전압화빈솔상관적각삼수대 SFS 검측맹구(Nondetection Zone,NDZ)적영향,위고도검측방법적실제응용제공이론의거.방진결과험증료이론분석적정학성.
The constant parallel RLC loads can't accurately reflect the practical performance of the islanding detection. In order to solve the problem, the comprehensive load model including voltage and frequency dependence is adopted and it accords with the actual operation of the power system. The detailed study of the performance of the Sandia Frequency Shift (SFS) method is carried out under this condition. The theoretical analysis shows that the load active power voltage/frequency dependence and quality factor have a significant impact on the nondetection zone (NDZ), and the effect of reactive dependency is negligible. In this paper, the impact of the comprehensive load’s parameters on the NDZ is analyzed, and the research provides a theoretical basis for the practical application of the islanding detection. The simulation results demonstrate the validity of the theoretical analysis.
