直流线路行波保护解析整定方法OA北大核心CSCDCSTPCD

Some problems exist in travelling wave transient process of HVDC transmission line, such aschromatic dispersion attenuation and bipolar coupling, makingit difficult to analyze fault quantities. In addition, protection device sampling is stochastic,further increasingdifficulty of quantitative analysis of criterion characteristic parameters. Therefore, a unified and effective setting method isabsentin travelling wave protection. Thispaper analyzeddemand of travelling wave setting from perspective of selectivity and sensitivity, and establisheda fault quantity analytical model for setting calculation based on key fault locations. In order to eliminate protection samplingrandomness, an analytical calculation method of criterion characteristic parameterswas proposed. According to characteristic curve demonstrating characteristic parameterchangesdue totransition resistances and lightning disturbances, protection settingwas calculated. This setting hasextraordinary abilityagainsttransition resistance and lightning disturbance. Comparative analysisof protection setting of actual HVDC transmission line and protection boundary verifiedvalidityoftheproposed analytical setting method.