大差动带低压选排的35kV双母线微机母差保护原理构成

The principle structure of a microprocessor-based busdifferentialprotection applying in 35 kV couple buses

介绍用BCH-2实现大差动带低压选排的35 kV母差保护的基本原理,并以此衍生出新一代的带有微机保护优良特征的大差动带低压选排原理的35 kV母差保护-RCS-915SH,并着重阐述了该型母差保护的原理构成。

After the argumentation of the necessity of the setting of the 35 kVbus differential protection, The paper introduces the basic principle of the differential protection which makes use of the electromagnetic differential relay BCH-2 as the fault distinguishing element, and utilizes the voltage relay as the bus zone selecting elements. Afterwards, a A microprocessor-based bus differential Protection solution applying in 35 kV couple buses is worked out. The protection intergrades the advantage of microprocessor and the traditional simple solution, and then will be used in Shanghai Municipal Electric Power Company.