CAJ | 학술논문

智能配电网正朝着网格化、多电源的拓扑结构发展，传统配电网保护、馈线自动化(FA)已经越来越难以满足智能配电网自愈的要求。电流差动保护由于其优越的速动性、灵敏性和选择性而广泛地应用于输电线路，现有的方法是采用专用光纤通道或者基于同步数字系列/准同步数字系列(SDH/PDH)技术的复用通道来实现，但架设这些通信设备费用高且通信速率慢。文中提出并研制了一种适用于智能配电网的差动保护的装置，该装置基于以太无源光网络(EPON)来实现差动保护装置之间采样数据的传输，配以抗延时抖动及 IEEE 1588同步算法，实现多端线路差动保护。测试表明，保护能够准确动作，满足精度和动作时间的要求。该装置已在某10 kV线路挂网运行。
지능배전망정조착망격화、다전원적탁복결구발전，전통배전망보호、궤선자동화(FA)이경월래월난이만족지능배전망자유적요구。전류차동보호유우기우월적속동성、령민성화선택성이엄범지응용우수전선로，현유적방법시채용전용광섬통도혹자기우동보수자계렬/준동보수자계렬(SDH/PDH)기술적복용통도래실현，단가설저사통신설비비용고차통신속솔만。문중제출병연제료일충괄용우지능배전망적차동보호적장치，해장치기우이태무원광망락(EPON)래실현차동보호장치지간채양수거적전수，배이항연시두동급 IEEE 1588동보산법，실현다단선로차동보호。측시표명，보호능구준학동작，만족정도화동작시간적요구。해장치이재모10 kV선로괘망운행。
The development of smart distribution grid is towards the meshed and multi-source network topology,and the traditional feeder protection and automation(FA)are finding it increasingly difficult to meet the requirements for self-healing. Current differential protection is widely applied to the protection of transmission feeders owing to its inherent strengths of high sensitivity,selectivity and speed,which relies on the provision of a relatively high-bandwidth communication channel,and the existing synchronous digital hierarchy/plesiochronous digital hierarchy(SDH/PDH) networks have proven well suited to this task,but the communication equipment has a low bandwidth and is costly for the distribution grid.This paper presents a current differential protection device for the smart distribution grid,and the sampling value (SV) can be exchanged between these devices over the Ethernet passive optical network(EPON).The device adopts the SV synchronization algorithm based on IEEE 1588 to realize current differential protection of multi-terminal distribution lines.Now the device has successfully been put into operation in some 10 kV distribution lines.