直流闭锁故障下机组一次调频性能分析与优化

Unit Primary Frequency Adjustment Performance Analysis and Optimizing Under DC Blocking Fault

在当前特高压电网加速建设的背景下,华东电网已初步形成"强交强直"的特高压大受端电网,直流区外来电负荷较大,渠道较多,直流闭锁事故频发,面临的安全风险将逐步加剧。在特高压输送线路故障情况下,如何保证区域电网的频率安全是今后需重点关注与研究的重要课题。通过对直流闭锁故障下涉网机组一次调频响应的分析,结合机组本身的运行工况,提出改善涉网机组一次调频能力的优化建议。

Under the background of the accelerating construction of EHV grid,east China power grid has initially formed a"strong AC&DC"of EHV receiving end grid.The DC grid has high external load with many ways,HVDC blocking faults frequently occurred,the safety risk will gradually increase.In EHV transmission line fault cases,how to ensure the security of regional power grid frequency is an important topic of research in the future.The article is based on primary frequency adjustment response performance analysis on network unit under HVDC pole blocking fault,combining with the working status of the unit itself,putting forward to optimizing suggestions to improve the capability of the involved network unit primary frequency adjustment performance.