變壓器差動保護歸算思路分析與對策

摘要: 電源容量、電源數(shù)量、線路數(shù)量、電壓等級的快速增長, 使對影響系統(tǒng)供電可靠性和電能質(zhì)量的設(shè)備要求提高,作為保護變壓器正常運行的保護裝置的靈敏性尤其重要. 分析了影響變壓器差動保護靈敏性的不平衡電流產(chǎn)生的機理, 以及傳統(tǒng)的繼電器保護產(chǎn)品和微機保護裝置對這些影響因素的歸算思路, 提出在以后繼電保護調(diào)試和年度預(yù)試工作中碰到變壓器保護不正常工作現(xiàn)象的解決對策.

關(guān)鍵詞: 變壓器; 差動保護; 歸算; 分析

Abstract :The rapid growth of power capacity , power line number , as well as voltage level , demands greatly for the reliability of power supply and the quality of power system, especially for the sensitivity of protection device which ensures the normal operation of transformers
. The generating mechanismof unbalance current , which may have great influence on the sensitivity of transformer differential protection, is analyzed , and the induction principles of the traditional relay protection products and microprocessor-based protection are also discussed .Some countermeasures are proposed in order to ensure transformer protectioninrelay protectionand debugging and normal annual test .