【摘要】 针对由于动态负荷和非同步机电源的暂态复杂特性导致系统暂态电压强度分析困难的问题，提出一种计及动态负荷特性的多馈入直流系统暂态电压强度分析方法。首先，根据电压刚度概念，给出暂态电压刚度的定义；然后，为描述感应电动机、新能源机组及直流等动态元件对系统暂态电压的影响，提取暂态关键时间断面，将复杂的暂态分析转换为关键时间断面的代数求解模型，从而提出暂态电压强度分析方法。最后，以华东电网为例验证所提的暂态电压强度分析方法的有效性，结果表明该方法能够对定量评估多馈入系统的电压支撑强度具有一定的指导意义。更多还原

【Abstract】 Aimed at the difficulty in transient voltage strength analysis due to the complex transient characteristics of dynamic load and non-synchronous-machine sources,a transient voltage strength analysis method for a multi-infeed DC system considering the dynamic load characteristics is proposed in this paper. First,the definition of transient voltage stiffness is given by drawing on the concept of voltage stiffness. Then,to describe the effects of dynamic components including induction motors,renewable energy units and DCs on the system transient voltage,the transient key time sections are extracted,and the complex transient analysis is converted into an algebraic solution model of key time sections,so as to formulate the transient voltage strength analysis method. Finally,the effectiveness of the proposed method is verified by a case study of East China Power Grid,and simulation results show that this method is of certain guiding significance in quantitatively evaluating the voltage support strength of multi-infeed DC systems.更多还原