电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2014年
8期
2257-2262
,共6页
郑涛%贾仕龙%潘玉美%杨国生
鄭濤%賈仕龍%潘玉美%楊國生
정도%가사룡%반옥미%양국생
有源配电网%分布式电源%故障分析%故障定位%准入容量
有源配電網%分佈式電源%故障分析%故障定位%準入容量
유원배전망%분포식전원%고장분석%고장정위%준입용량
active distribution network%distribution generation%fault analysis%fault location%allowed penetration level
为解决由于分布式电源(distributed generation，DG)接入而导致的传统配电网故障区段定位方案不再适用的问题，提出一种通过限制DG接入容量，保证传统故障区段定位方案可用的方法。首先简述了传统故障区段定位方案以及DG故障电流的计算方法；然后分析了DG接入对传统配电网故障区段定位方案的影响，提出了保证原有故障区段定位方案适用时，系统电源提供的最小短路电流与DG提供的最大反向短路电流应满足的要求，因为两者均与DG的接入容量相关，所以上述要求相当于对DG的最大接入容量作出限制。算例表明，限制DG的接入容量，基于短路计算可设置合理的开关定值来区分系统电源提供的最小短路电流及DG提供的最大反向短路电流，保证传统的故障区段定位方案可用。与其他开关定值设置方法的对比表明，直接基于短路电流计算，会提高DG的接入容量或者馈线的供电长度。
為解決由于分佈式電源(distributed generation，DG)接入而導緻的傳統配電網故障區段定位方案不再適用的問題，提齣一種通過限製DG接入容量，保證傳統故障區段定位方案可用的方法。首先簡述瞭傳統故障區段定位方案以及DG故障電流的計算方法；然後分析瞭DG接入對傳統配電網故障區段定位方案的影響，提齣瞭保證原有故障區段定位方案適用時，繫統電源提供的最小短路電流與DG提供的最大反嚮短路電流應滿足的要求，因為兩者均與DG的接入容量相關，所以上述要求相噹于對DG的最大接入容量作齣限製。算例錶明，限製DG的接入容量，基于短路計算可設置閤理的開關定值來區分繫統電源提供的最小短路電流及DG提供的最大反嚮短路電流，保證傳統的故障區段定位方案可用。與其他開關定值設置方法的對比錶明，直接基于短路電流計算，會提高DG的接入容量或者饋線的供電長度。
위해결유우분포식전원(distributed generation，DG)접입이도치적전통배전망고장구단정위방안불재괄용적문제，제출일충통과한제DG접입용량，보증전통고장구단정위방안가용적방법。수선간술료전통고장구단정위방안이급DG고장전류적계산방법；연후분석료DG접입대전통배전망고장구단정위방안적영향，제출료보증원유고장구단정위방안괄용시，계통전원제공적최소단로전류여DG제공적최대반향단로전류응만족적요구，인위량자균여DG적접입용량상관，소이상술요구상당우대DG적최대접입용량작출한제。산례표명，한제DG적접입용량，기우단로계산가설치합리적개관정치래구분계통전원제공적최소단로전류급DG제공적최대반향단로전류，보증전통적고장구단정위방안가용。여기타개관정치설치방법적대비표명，직접기우단로전류계산，회제고DG적접입용량혹자궤선적공전장도。
To solve the problem that the traditional distribution network fault section location scheme isn’t applicable to the integration of the distributed generation (DG), a method by limiting DG’s access capacity to guarantee the traditional fault location methods available is proposed. Firstly, the traditional fault location methods and the calculation of fault current of DG are introduced; then the effect of DG on the traditional fault location methods is analyzed;the requirements, that the minimum short-circuit current provided by the system power source and the maximum reverse short-circuit current provided by DG should satisfy for the traditional fault location methods to apply to distribution network with DGs, are proposed, which mean that the maximum access capacity of DGs are restricted. Results of calculation example show that on the basis of calculation of fault current reasonable switch value could be set up to distinguish the minimum current provided by the system power source and the maximum current provided by DG, which ensure that traditional fault section location scheme is available. And comparation with other switch value setting methods suggest that the analysis method based on fault current calculation can improve the DG integration capacity or the power supply distance of the feeder.
