混合法暂态稳定实用计算的几点改进  

Some improvements on application of hybrid method for transient stability analysis

作　　者：王宗义[1] 余志文[2] 郭志忠[3] 

机构地区：[1]中国南方电网公司市场交易部,广东广州510623 [2]中国南方电网公司广东省电力调度中心,广东广州510600 [3]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《继电器》2008年第11期37-41,共5页Relay

摘　　要：针对混合法暂态稳定分析在能量函数计算、稳定情况判别以及稳定指标计算等方面存在的问题,从实用化的角度,提出了几点改进。采用由功角、转速、加速功率以及动能和势能定义的综合判据来判断系统稳定情况,可以避免故障后稳定平衡点的求取和失稳模式的识别。对于系统稳定情形,利用系统运动轨迹回摆处的功角值定义的指标,来表征系统的稳定程度,进一步可以比较不同控制措施对稳定的作用,其优势在于计算方便。华北和东北互联电网及New England系统的算例分析验证了所提出判据及稳定指标的有效性。Some improvements on transient energy function calculation, stability criterion and stability index for the practice of hybrid method of transient stability analysis are proposed. Integrated criterion based on rotor angle, angular velocity, acceleration power, kinetic energy and potential energy is put forward for estimating the system stability, which is independent of the calculation of post-fault stable equilibrium point and mode of disturbance. For the stable case, using the value of angles at the system swing back point, stability index is defined for denoting the degree of stability and comparing the effects of various stability control actions. Case studies on North China and Northeast China interconnected grid and New England test system show the effectiveness and efficiency of this method.

关 键 词：暂态稳定 混合法 势能参考点 稳定判据 稳定裕度 

分 类 号：TM712[电气工程—电力系统及自动化]