Transient Voltage Strength Analysis Method for Multi-infeed DC System Considering Dynamic Load Characteristics
Aimed at the difficulty in transient voltage strength analysis due to the complex transient characteristics of dy-namic 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 in-cluding induction motors,renewable energy units and DCs on the system transient voltage,the transient key time sec-tions are extracted,and the complex transient analysis is converted into an algebraic solution model of key time sec-tions,so as to formulate the transient voltage strength analysis method.Finally,the effectiveness of the proposed meth-od is verified by a case study of East China Power Grid,and simulation results show that this method is of certain guid-ing significance in quantitatively evaluating the voltage support strength of multi-infeed DC systems.
multi-infeed DC systemtransient voltage strengthdynamic loadtime sectionnovel power system
万方数据
维普
