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结合新乡火电厂200MW机组,分析与机组配套的给水泵电机差动保护误动原因,并提出了改进方法,取得了满意的效果.“,”This paper anlyzes the maloperation reasonof feed pump motor differential protection combiningwith 200 MW steam turbine generator units of XingXiang thermal power plant.,then presents some im-proved methods.There is eapected effects.