【摘要】 广域动态信息系统的建设和同步相量测量技术的发展为实时监视和预测电力系统暂态稳定性奠定了物质基础,采用广域动态轨迹信息协调决策全网紧急控制措施的实施会大大提高控制措施的正确性和有效性。文章提出了一种基于轨迹几何特征识别多机系统暂态不稳定性的方法,并利用结构保持模型下的暂态能量函数分析了所提方法的正确性。算例结果表明该方法具有较高的可靠性和较少的计算量,对系统模型参数有较强的鲁棒性,有望用作基于新一代广域测量系统(WAMS)的暂态稳定紧急控制的启动判据。更多还原

【Abstract】 The construction of wide area dynamic information system and development of synchronous phasor measuring technology provide material base for real-time monitoring and prediction of power system transient stability.The correctness and effectiveness of control measures can be noticeably improved by means of adopting wide area dynamic trajectory information to coordinate and decide the implemention of emergency control for whole power network.Based on the geometric features of trajectory a method to identify transient instability of multi-machine system is proposed,and the correctness of the proposed method is verified by transient energy function of structure preserving model.Results of calculation examples show that the proposed method is more reliable while less calculation amount is needed;the proposed method possesses stronger robustness for parameters of system model,so it could be applied as the start-up criterion of power system transient stability emergency control based on new generation of wider-area measurement system(WAMS).更多还原