电力系统暂态稳定数字仿真有效性评价  

Validity assessment of power system transient stability numerical simulation

作　　者：张恒旭[1] 张宁[1] 刘玉田[1] 

机构地区：[1]山东大学电气工程学院,山东济南250061

出　　处：《电力自动化设备》2007年第7期13-16,共4页Electric Power Automation Equipment

摘　　要：提出了稳定性、极值和均值3种仿真误差评价指标,分别反映误差对暂态功角稳定计算结果的宏观影响、全系统观测物理量的最大误差和加权平均误差。其中,稳定性指标由扩展等面积准则(EEAC)提供的稳定裕度定义,可以在宏观层面对仿真误差作出定性和定量的判断;极值指标表征了仿真结果中某个变量与参考结果的最大误差;加权均值指标对不同元件的仿真误差加以不同权重,以突出所关注区域或元件仿真结果的准确程度。基于上述评价指标,以山东电网为例,仿真计算并分析了发电机模型、负荷模型以及积分步长对仿真误差的影响,计算结果表明了所提出误差评价指标的有效性。Three assessment criteria of simulation validity are proposed：stability,extremum and mean. The stability index,which is developed based on the transient angle stability margin provided by EEAC （Extended Equal Area Criteria）,reflects the impact of simulation error on transient angle stability qualitatively and quantitatively. The extremum shows the maximum deviation of variable from its reference. The mean gives the weighted average error of the simulation errors for different elements,which are given different weight to emphasize the simulation error of the element or area concerned. With Shandong power grid as an example,effects of generator model,load model and integral step-size on simulation errors are studied based on above criteria,and the calculative results show that the proposed assessment criteria of simulation validity are effective.

关 键 词：暂态稳定 数字仿真 积分步长 仿真有效性 

分 类 号：TM743[电气工程—电力系统及自动化]