摘要
在发生不对称故障情况下,风电系统机电暂态仿真结果与电磁暂态仿真结果间存在较大的差异,严重影响了仿真系统稳定性评估的准确性。为减少在不对称故障情况下风电系统机电暂态仿真与电磁暂态仿真间的误差,文中提出了一种基于数据挖掘的风电系统机电暂态仿真恢复特性曲线修正方法,并给出了其机电仿真的主要误差评价指标。最后,以PSCAD/EMTDC上风电系统的电磁暂态仿真曲线为标准响应曲线,以PSASP上风电系统机电暂态仿真曲线为目标,通过构造相应的样本库和修正算例进行验证,仿真结果说明了所提出方法的有效性和评价指标的合理性。
Under the condition of asymmetric fault,there is a large difference between the electromechanical transient simulation results of the wind power system and the electromagnetic transient simulation results,which seriously affects the accuracy of the stability evaluation of the simulation system. In order to reduce the error between electromechanical transient simulation of wind power system and electromagnetic transient simulation under the condition of system asymmetry,this paper presents a method to modify the characteristic curve of electromechanical transient simulation of wind power system based on data mining. And the main error evaluation indexes of electromechanical simulation are given. Finally,this paper takes the electromagnetic transient simulation curve of PSCAD/EMTDC as the standard response curve,and takes the PSASP wind power system electromechanical transient simulation curve as the goal,to verify through the construction of the corresponding sample library and correction examples. The simulation results show the validity of the proposed method and the rationality of the evaluation index.
引文
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