特高压直流控制系统机电暂态等效建模与参数实测方法

Equivalent Modeling and Real Parameter Measurement Methods of Control Systems of UHVDC Transmission Systems

随着特高压直流的快速发展,交直流电网特性日趋复杂,对直流模型仿真精度的要求越来越高,国内机电暂态程序中的原有直流模型已无法适应。为解决此问题,提出在机电暂态仿真中模拟特高压直流实际控制特性的聚合等值、有效值等值、替代等值3类等效建模方法,建立相应的仿真模型。在此基础上,提出依据现场实测数据和直流控保电磁暂态仿真数据的模型参数实测与校核方法。仿真结果表明,模型与方法具有有效性和较高的仿真准确性。

With fast development of UHVDC projects, characteristics of AC-DC power grids become more and more complex, requiring increasingly higher accuracy in HVDC models. Old models in domestic electromechanical transient programs do not adapt to this situation. To solve this problem, this paper proposes three kinds of equivalent modeling methods for electromechanical transient simulations, in order to simulate practical control characteristics of UHVDC projects. Furthermore, real parameter measurement method according to real data and those of accurate electromagnetic transient simulations is also proposed. Simulation results show that the models and the methods possess better effectiveness and higher accuracy.