电压安全域的最小负荷裕度计算  

Calculation of the minimum load margin in voltage security region

作　　者：苗峰显[1] 郭志忠[2] 

机构地区：[1]国家电网公司交流建设分公司,北京100052 [2]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：《电机与控制学报》2010年第10期68-72,共5页Electric Machines and Control

基　　金：哈尔滨工业大学科研创新基金(HIT.NSRIF.2008.54)

摘　　要：为了评估系统电压稳定性,提出电压安全域的最小负荷裕度算法。该方法在压缩网络的基础上利用降阶雅可比矩阵最小特征模式的参与因子得到最薄弱的负荷节点。利用矩阵部分求逆算法得到对薄弱负荷节点电压灵敏度最小的发电机节点,并将其作为新增负荷的功率平衡节点,利用选出的最薄弱负荷节点和发电机节点形成初始的功率增长方向,通过连续潮流算法得到电压安全域的最小负荷裕度。无功不足引起电压崩溃这一重要因素在算法中得以体现。通过IEEE多个算例仿真以及与相关文献算例结果对比验证了所提出算法的正确性和有效性。In order to evaluate voltage stability of system,a method of the minimum load margin in voltage security region is put forward.Based on reduced Jacobian matrix,the weakest load bus was obtained by using participation factors of the minimal eigenvalue model.The generator bus with the minimum voltage sensitivity to the weakest load was selected as the power balance bus of newly added load by using the algorithm of partial inverse matrix.The initial power increasing direction was formed based on the selected weakest load bus and generator bus,and the minimum load margin in voltage security region was obtained by using continuation power flow method.The important factor that voltage instability is caused by the deficiency of reactive power was considered in this method.The numerical examples of some standard tested IEEE systems and the comparison with the related literature demonstrate that the proposed method is accurate and efficient.

关 键 词：电压稳定 安全域 连续潮流 灵敏度 最小负荷裕度 

分 类 号：TM711[电气工程—电力系统及自动化]