介绍了黄河小峡水电站#4机组一次调频试验的目的、技术要求、条件、内容等,通过试验和数据分析验证了机组的一次调频能力、一次调频功能投入的条件等能否满足电网的技术指标及要求,从而为提高电力系统稳定性奠定了基础。 This paper introduces the purpose, technical requirements, conditions, contents and so on of the primary frequency modulation test of unit # 4 of Yellow River Gorges Hydropower Station. The primary frequency modulation capability of the unit and the conditions of the primary frequency modulation function input are verified by the test and data analysis to meet the technical specifications of the power grid And requirements, thus laying the foundation for improving the stability of the power system.