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介绍了湖北电网在开展AGC工作中面临的问题,其中火电厂RTU与机护协调装置的接口改造工作,是实现湖北电网AGC功能的一个关键环节.对RTU的接口改造方案进行了分析比较,确定合理技术方案,并介绍了该方案在汉川电厂、青山电厂AGC联调过程中的实施和应用情况.在遇到与湖北电网类似的情况时,该RTU接口改造方法不失为一种投资少、见效快的技术方案.“,”This paper introduces the problem facedin the realizahon of automatic generation control(AGC) in Hubei Electric Power System. The interfaceimprovement between RTU and CCS is the key pointin the realizahon of AGC in our system.Different waysof inteffoce improvement has been discussed. The reali-zation in the process of AGC in Hanchuan and Qin-shan power plant has been described.This way ofRTU interfoce improvement is a good method whichhas low cost and short time in realization,which isuseful wherever the condition is sirmlar with HubeiElectric Power System.