基于直觉模糊决策的机组励磁系统动态性能评价

Excitation System Dynamic Performance Evaluation of Generator Units Based on Intuitionistic Fuzzy Sets Strategy

为利用多个运行指标实现对机组励磁系统动态性能全面、客观地评估,提出了基于直觉模糊决策的励磁系统动态性能综合评估方法。评估过程中,主要选取了机组励磁输出响应滞后时间、励磁电压上升速度、励磁系统暂态增益或动态增益、稳态增益等作为评估指标,并给出了指标计算方法。所提评估方法采用直觉模糊集确定励磁系统各指标的权重,采用改进逼近理想点法计算励磁系统动态性能综合指标。最后,分别采用仿真算例和某地区多台机组励磁系统的实际运行数据对所提综合评估方法进行了验证,结果表明所提基于直觉模糊决策的机组励磁系统动态性能评估方法是有效和可行的。

To indicate excitation system dynamic performance comprehensively and objectively, an excitation system comprehensive evaluation method based on intuitionistic fuzzy sets was presented. Evaluation indexs such as the conventional unit excitation output response lag time, the excitation voltage rise speed, the excitation system transient gain or dynamic gain, the static gain were mainly used, and the calculation method of each evaluation indexis were presented. In the evaluation method, the intuitionistic fuzzy sets strategy was used to determine the index weight of excitation system and the improved technique for order preference by similarity to ideal solution（TOPSIS） was used to calculate the comprehensive dynamic performance of excitation system. The presented comprehensive evaluation method is verified by simulation tests and actual operation data of excitation system of multiple generator units respectively, and the results show that the performances of excitation systems of generator units is effective and feasible by using the proposed evaluation method.