电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
5期
40-44
,共5页
高厚磊%李娟%朱国防%徐丙垠%赵宝光%李尚振
高厚磊%李娟%硃國防%徐丙垠%趙寶光%李尚振
고후뢰%리연%주국방%서병은%조보광%리상진
有源配电网%分布式电源%电流差动保护%正序故障分量%自同步%对等通信
有源配電網%分佈式電源%電流差動保護%正序故障分量%自同步%對等通信
유원배전망%분포식전원%전류차동보호%정서고장분량%자동보%대등통신
active distributed network%distributed generation%current differential protection%positive sequence fault component%self-synchronization%peer to peer communication
有源配电网具有多电源、多分段、多分支、功率双向流动、弱馈等特征,传统三段式电流保护难以保证选择性和灵敏性,需要提供新的更有效的保护方法。基于该背景,将正序故障分量电流差动保护引入到有源配电网,探讨其应用原理与实现技术。针对不同的馈线结构,给出了适应性差动保护动作判据及门槛整定原则。针对配电网线路特点,提出并实现了基于故障信息的电流数据自同步方法。根据配电自动化通信体系最新进展,探讨了基于点对点对等通信实现差动保护数据交换的通信规约。基于智能配电终端平台,开发出正序故障分量电流差动保护样机并对其进行了综合测试,测试结果验证了所提保护方案的可行性。
有源配電網具有多電源、多分段、多分支、功率雙嚮流動、弱饋等特徵,傳統三段式電流保護難以保證選擇性和靈敏性,需要提供新的更有效的保護方法。基于該揹景,將正序故障分量電流差動保護引入到有源配電網,探討其應用原理與實現技術。針對不同的饋線結構,給齣瞭適應性差動保護動作判據及門檻整定原則。針對配電網線路特點,提齣併實現瞭基于故障信息的電流數據自同步方法。根據配電自動化通信體繫最新進展,探討瞭基于點對點對等通信實現差動保護數據交換的通信規約。基于智能配電終耑平檯,開髮齣正序故障分量電流差動保護樣機併對其進行瞭綜閤測試,測試結果驗證瞭所提保護方案的可行性。
유원배전망구유다전원、다분단、다분지、공솔쌍향류동、약궤등특정,전통삼단식전류보호난이보증선택성화령민성,수요제공신적경유효적보호방법。기우해배경,장정서고장분량전류차동보호인입도유원배전망,탐토기응용원리여실현기술。침대불동적궤선결구,급출료괄응성차동보호동작판거급문함정정원칙。침대배전망선로특점,제출병실현료기우고장신식적전류수거자동보방법。근거배전자동화통신체계최신진전,탐토료기우점대점대등통신실현차동보호수거교환적통신규약。기우지능배전종단평태,개발출정서고장분량전류차동보호양궤병대기진행료종합측시,측시결과험증료소제보호방안적가행성。
For active distribution network, its characteristics can be described as multi-source, multi-segment, multi-branch, bidirectional power flow, bidirectional fault current, weak-infeed and so on. In this case, the selectivity and sensitivity of traditional over current protection scheme cannot be ensured. It is necessary to provide more effective protection methods. This paper introduces a current differential protection scheme based on positive sequence fault component (PSFC) into active distribution network, and discusses its application principle and implementation technology. For different structure of feeders, the corresponding criterions and threshold setting rules are provided. In view of the current condition of distribution network, a self-synchronization scheme using fault signal is proposed and realized. And the communication protocols used for data exchange of differential protection based on peer to peer communication is discussed according to the new development of distribution automation communication architecture. Finally, the proposed protection prototype is developed based on a platform of intelligent distribution terminal, and the test results have verified the feasibility of the protection scheme.