基于多个广域测量系统的联合低频振荡分析和监测  

Multiple WAMS-Based Coordinated Analysis and Monitoring of Low Frequency Oscillations

作　　者：段刚[1] 詹庆才[1] 杨东[1] 谢晓冬[1] 吴京涛[1] 肖小刚 王健 刘涛 

机构地区：[1]北京四方继保自动化股份有限公司,北京100085 [2]国家电网华中电力调控分中心,湖北武汉430077

出　　处：《中国电力》2015年第4期101-106,共6页Electric Power

摘　　要：对于跨区域低频振荡,区域广域测量系统(WAMS)仅根据其获取的本区域信息不能分析出低频振荡的全部模态信息。提出了利用多个广域测量系统进行联合低频振荡分析和监测的方法。在多个调度中心的广域测量系统中,选择一个为联合振荡监视主站,其余设为子站。当任何子站或主站监测到低频振荡发生时,触发全网联合低频振荡分析。各子站分别对各自的测点进行频谱分析,并将分析结果汇总到主站。主站对来自于不同WAMS以及不同频谱分析算法的振荡分析结果进行相位同步,并确定振荡事件的真实发生时刻,然后进行全网的振荡节点同调分群、计算各节点对振荡的相对贡献程度等模态分析,分析的全局结果返回给各子站。该方法使得各调度中心广域测量系统均能对影响到自身电网的低频振荡事件及时获知振荡的范围、节点分群情况、分界面位置、自身电网机组对振荡的参与程度等详细的振荡模态信息,有利于快速做出正确的低频振荡控制策略。For low frequency oscillation spanning several control areas, local WAMS cannot identify the oscillation mode if only according to the information obtained in its own control area. A coordinated analysis and monitoring method for low frequency oscillations is proposed based on the information from several wide Area Measurement Systems （WAMS）. For the power system with several WAMS control centers, one of the control centers is selected as the master WAMS, the others are treated as slave WAMS. In ease that one of the WAMS detects a dangerous low frequency oscillation occurring in its control area, it will trig the coordinated analysis of low frequency oscillation based on the data from all WAMS. The slave WAMSs make frequency analysis of their own measurements respectively, and send the results to the master station. The master station synchronizes the analysis results from different WAMS and different frequency analysis methods, and then makes coherent group of the buses and calculate the relative contributions of key buses to the power oscillation. The analysis result is then returned to the slave WAMS. By this method, each control center can clearly understand its role in a wide area when low frequency oscillation involves several control centers, which will help to control the low frequency oscillation.

关 键 词：广域测量系统 相量测量单元 低频振荡 同调分群 频谱分析 联合分析 综合告警 

分 类 号：TM712[电气工程—电力系统及自动化]