山西电力
山西電力
산서전력
SHANXI ELECTRIC POWER
2013年
2期
4-7
,共4页
分布式发电%微电网%故障检测
分佈式髮電%微電網%故障檢測
분포식발전%미전망%고장검측
distributed generation%microgrid%fault detection
针对微电网具有短路电流小、潮流双向流动等特点,基于不同短路故障情况下微电源出口扰动电压量的特点,研究了适用于并网运行和孤岛运行模式下微电网侧基于扰动电压量的保护方法,可实现对微电网短路故障的类型判断,同时提出了微电网保护闭锁策略、与微电网相联的配电网侧基于通讯的单元级电流保护策略,运用电力系统计算机自动仿真软件仿真验证了所提出的微电网保护策略的可行性.
針對微電網具有短路電流小、潮流雙嚮流動等特點,基于不同短路故障情況下微電源齣口擾動電壓量的特點,研究瞭適用于併網運行和孤島運行模式下微電網側基于擾動電壓量的保護方法,可實現對微電網短路故障的類型判斷,同時提齣瞭微電網保護閉鎖策略、與微電網相聯的配電網側基于通訊的單元級電流保護策略,運用電力繫統計算機自動倣真軟件倣真驗證瞭所提齣的微電網保護策略的可行性.
침대미전망구유단로전류소、조류쌍향류동등특점,기우불동단로고장정황하미전원출구우동전압량적특점,연구료괄용우병망운행화고도운행모식하미전망측기우우동전압량적보호방법,가실현대미전망단로고장적류형판단,동시제출료미전망보호폐쇄책략、여미전망상련적배전망측기우통신적단원급전류보호책략,운용전력계통계산궤자동방진연건방진험증료소제출적미전망보호책략적가행성.
As to microgrid,its short-circuit current is low and its power flow is bidirectional. Based on the characteristics of the disturbance voltage at the micro power outlet in different situations of short circuit,this article has studied the protection method according to the microgrid disturbance voltage suitable for grid-connected and island operation. This method can also decide the type of microgrid short-circuit fault. Besides,this article puts forward the microgrid blocking protection strategy, and communications-based element current protection strategy of distribution network connected with microgrid. The computer automated simulation software used in electric power system has proved the feasibility of all the microgrid protection strategies proposed.
