电工电气
電工電氣
전공전기
ELECTROTECHNICS ELECTRIC
2013年
12期
22-25,48
,共5页
分布式电源%配电网%电流保护%短路电流%对策
分佈式電源%配電網%電流保護%短路電流%對策
분포식전원%배전망%전류보호%단로전류%대책
distributed generation%distribution network%current protection%short-circuit current%countermeasure
含分布式电源并网的配电网发生短路故障时，流经保护的短路电流会受到分布式电源提供的助增电流、汲取电流或反方向电流的影响，导致线路电流保护的误动或者拒动。基于IEEE33节点配电系统，在PSASP平台上搭建了仿真模型，计算了多个故障点下流经保护的短路电流大小，分析了分布式电源不同接入容量和位置对线路电流保护的影响，得出了对保护的分区域影响结论，并给出了几种减小影响的措施。
含分佈式電源併網的配電網髮生短路故障時，流經保護的短路電流會受到分佈式電源提供的助增電流、伋取電流或反方嚮電流的影響，導緻線路電流保護的誤動或者拒動。基于IEEE33節點配電繫統，在PSASP平檯上搭建瞭倣真模型，計算瞭多箇故障點下流經保護的短路電流大小，分析瞭分佈式電源不同接入容量和位置對線路電流保護的影響，得齣瞭對保護的分區域影響結論，併給齣瞭幾種減小影響的措施。
함분포식전원병망적배전망발생단로고장시，류경보호적단로전류회수도분포식전원제공적조증전류、급취전류혹반방향전류적영향，도치선로전류보호적오동혹자거동。기우IEEE33절점배전계통，재PSASP평태상탑건료방진모형，계산료다개고장점하류경보호적단로전류대소，분석료분포식전원불동접입용량화위치대선로전류보호적영향，득출료대보호적분구역영향결론，병급출료궤충감소영향적조시。
When the short-circuit fault occurs at the distribution network connected with distributed generation (DG), the short-circuit cur-rent in protection equipment will be affected by the increasing lfow, decreasing lfow and opposite direction lfow of the distributed generation, to cause the misoperation or failure action of current protection. Based on the IEEE33-node distribution system, the simulation model was built on PSASP platform. This paper calculated the short-circuit current through the protection in the case of multiple fault points and analyzed the inlfu-ence of different capacity and position of DG on the current protection. The effect to the region of protection is concluded and several methods to lower the inlfuence are proposed.
