电力系统输电线路接地距离保护整定计算研究

文章主要推导和分析了接地距离保护与相邻线路接地距离，零序和纵联保护配合的计算方法和计算公式。尤其是详细推导有零序互感耦合线路相互配合的精确计算方法和公式，并提出了综合助增系数的新概念，文中公式推导祥尽准确，在不考虑零序互感影响时与相邻线路接地距离Ⅰ段配合的公式与整定规程完全相同。文中公式和结论已在整定计算程序设计或实际整定计算中采用。并有详尽的实际系统计算和分析。

RESEARCH ON SETTING CALCULATION OF GROUNDING DISTANCE PROTECTION OF TRANSMISSION LINE

The calculation method and formulae for coordination of grounding distance protection with zero sequence protection and longitudinal differential protection of adjacent transmission line are derived and analyzed, especially, the accurate calculation method and formulae for coordination of transmission lines coupled by zero sequence mutual inductance are deduced in detail, and a new concept of comprehensive feeding in coefficient is put forward. The formula derivations are detailed and accurate, without considering the influence of zero sequence mutual inductance the presented formulae are completely identical to the formula for coordination with the first step of grounding distance protection of adjacent line given by setting rules. The formulae and conclusion in this paper are applied in the setting calculation programming and practical setting calculation. Detailed calculation results and analyses for the settings of practical transmission line are given.