鸡西大学学报
鷄西大學學報
계서대학학보
Journal of Jixi University
2015年
11期
64-67
,共4页
微电网%孤岛检测%主动频率偏移法%总谐波失真%检测盲区
微電網%孤島檢測%主動頻率偏移法%總諧波失真%檢測盲區
미전망%고도검측%주동빈솔편이법%총해파실진%검측맹구
Micro-grid%islanding detection%active frequency drift%total harmonic distortion%non-detection zone
随着微电网技术的不断发展和广泛应用,计划外孤岛运行故障出现的可能性也就增加了。计划外孤岛运行状态可能对人身安全和设备寿命造成危害,只有及时应对才能避免不良状况的发生。传统的主动频率偏移法,当施加的扰动注入到大电网时,检测盲区由总谐波失真决定。针对传统方法的这一缺点,提出一种新的电流扰动注入方法。应用此方法可以减少系统的总谐波失真量,且检测盲区被改善,检测速度被提高。在Matlab/Simulink环境下建立了系统模型,对提出的新方法进行了仿真,并详尽地分析了试验结果。
隨著微電網技術的不斷髮展和廣汎應用,計劃外孤島運行故障齣現的可能性也就增加瞭。計劃外孤島運行狀態可能對人身安全和設備壽命造成危害,隻有及時應對纔能避免不良狀況的髮生。傳統的主動頻率偏移法,噹施加的擾動註入到大電網時,檢測盲區由總諧波失真決定。針對傳統方法的這一缺點,提齣一種新的電流擾動註入方法。應用此方法可以減少繫統的總諧波失真量,且檢測盲區被改善,檢測速度被提高。在Matlab/Simulink環境下建立瞭繫統模型,對提齣的新方法進行瞭倣真,併詳儘地分析瞭試驗結果。
수착미전망기술적불단발전화엄범응용,계화외고도운행고장출현적가능성야취증가료。계화외고도운행상태가능대인신안전화설비수명조성위해,지유급시응대재능피면불량상황적발생。전통적주동빈솔편이법,당시가적우동주입도대전망시,검측맹구유총해파실진결정。침대전통방법적저일결점,제출일충신적전류우동주입방법。응용차방법가이감소계통적총해파실진량,차검측맹구피개선,검측속도피제고。재Matlab/Simulink배경하건립료계통모형,대제출적신방법진행료방진,병상진지분석료시험결과。
With the development and application of the micro-grid technology, the possibility of the unplanned islanding oper-ation is also increased.The status of the unplanned islanding operation may have a danger to the personal safety and the life of the equipment.In order to avoid the occurrence of adverse conditions, we should promptly responding to this phenomenon.Active Fre-quency Drift ( AFD) is the representative of active anti-islanding detection method.When the large power system is injected into the disturbance, the non-detection zone of the traditional active frequency drift method is determined by the total Harmonic Distor-tion ( THD) .In order to solve the shortcoming of the traditional AFD method, a new current perturbation injection method is pro-posed in this paper.The total harmonic distortion can be reduced by using this method, and non-detection zone is improved, the detection rate is increased.This paper builds a system modeling and makes a simulation for the proposed method by using Matlab/Simulink.Finally, the results of the experiment are analyzed in detail.