新型电力系统失步广域控制技术研发

Research and Development of New Wide Area Out-of-Step Control Technology for Power Systems

针对传统解列控制技术在解决复杂失步振荡问题时的局限性,研究了基于广域测量系统监测大电网失步过程的方法,开发了失步断面拓扑分析算法、基于Prony和聚类分析的机群振荡模式在线辨识方法、基于电网稳定特性的功角失稳预测方法,提出了失步广域控制策略,在此基础上开发了失步广域控制系统。介绍了失步广域控制系统的结构,分析了广域紧急控制系统的延时要求。基于实时仿真技术构建了失步控制的测试系统,以四川电网为例模拟各种电网故障,对系统进行了闭环控制测试。试验证明所开发的失步广域控制系统能够准确定位失步断面,快速预测电网失步机群,及时完成断面级解列控制,控制效果满足大电网断面级失步控制要求。

To cope with the limitation of traditional out-of step control technology in complex asynchronous oscillation,a wide area measurement system（WAMS） based method to monitor out-of-step occurred in large-scaled power grid is researched,and a topological analysis algorithm for out-of-step tie line,a Prony algorithm and clustering analysis based online identification method for generator group oscillation and a angle instability forecasting method based on stability characteristics of power grid are developed.A wide-area out-of-step control strategy is proposed and on this basis a wide-area out-of-step control system is developed.The architecture of the developed wide-area out-of-step control system is presented and the requirement on time-delay of wide-area emergency control system is analyzed.Based on real-time simulation,a testing system for out-of-step control is constructed and taking the Sichuan power grid for example various power system faults are simulated and the testing of closed-loop control of the developed wide-area out-of-step control system is performed.Test results show that using the developed wide-area out-of-step control system the out-of-step tie line can be located accurately and the generator group that will be out-of-step can be rapidly predicted and the splitting control of tie-line interface can be performed in time,and the control effects can satisfy the requirement of splitting control for transmission interface in large-scaled power grid.