应用微分同胚正规形提高静态电压稳定

无功功率的合理补偿是电力系统稳定性和安全运行的一个重要因素,为研究其补偿方式,采用微分同胚正规形理论分析电力系统的潮流方程,提出了以节点电压非线性参与因子为指标来衡量电力系统中不同节点无功功率对静态电压稳定性的影响程度的方法。根据最危险模式的节点电压非线性参与因子大小分配无功功率,可以得到合理的无功补偿方式,有效地增强电力系统的电压稳定性。将所提出的方法用于New England39节点系统的仿真结果表明,随着电压非线性参与因子之间差值的减小,无功补偿方式趋于合理,系统电压稳定性逐渐提高。因此,节点电压非线性参与因子是分析电力系统电压稳定性的一个有效指标,可以用该指标对无功进行合理的分配,从而提高电力系统静态电压稳定性。

Enhancement of Steady-state Voltage Stability by Normal Forms of Diffeomorphism

For the study of the reactive power compensation,this paper analyzes the power system power flow equations by using the theory of normal forms of diffeomorphism.And the bus voltage nonlinear participation factor is proposed to measure the effect of the reactive power on the power system steady-state voltage stability.Then the reactive power dispatch optimization method is proposed incorporating the bus voltage nonlinear participation factor.Case studies are performed using the New England 39-bus power system.The results show that with the decrease of the difference of the bus voltage nonlinear participation factor,the reasonable reactive power compensation is ensured and the voltage stability is enhanced.Therefore,the bus voltage nonlinear factor is an effective index to analyze the power system voltage stability.It can give the correct indication of the reactive power compensation dispatch to enhance the voltage stability.