应用变异系数法和逼近理想解排序法的风电场综合评价

Comprehensive Evaluation of Wind Farms Using Variation Coefficient Method and Technique for Order Preference by Similarity to Ideal Solution

利用单一指标难以对风电场运行安全性进行全面、客观评价,提出一种基于变异系数法和逼近理想解排序法的风电场安全运行综合评价方法。该方法首先利用变异系数法计算各指标相应权重,其次根据逼近理想解排序法计算样本点到最优样本点的相对接近度,通过对计算所得相对接近度进行排序实现风电场的综合评价排名。主要选取了高/低频率穿越能力、低电压穿越能力、并网点电压偏差、SVC/SVG动态响应性能、有功控制能力和功率损耗作为风电场评价指标,最后以某地区风电场运行情况的综合评价为例,验证了所提风电场综合评价方法的有效性和可行性。

It is hard to comprehensively and objectively evaluate the operation security of wind farms by single index, for this reason, based on variation coefficient method and technique for order preference by similarity to an ideal solution （TOPSIS） a comprehensive evaluation method for operation security of wind farms is proposed. Firstly, the variation coefficient method is used to calculate corresponding weights of all indices; secondly, the relative approach degree of each wind farm from corresponding sample point and the optimal sample point is calculated by TOPSIS, and then through the ranking of the calculated relative approach degree the comprehensive evaluation rank of wind farms is implemented. The high/low frequency ride through ability, low voltage ride through ability, voltage deviation at grid-connected point, dynamic response performance of SVC/SVG, active power control ability and power loss are chosen as evaluation indices for wind farms. Finally, taking the comprehensive operation security evaluation of wind farms located at a certain region as the case, the effectiveness and the feasibility of the proposed comprehensive evaluation method for wind farms are validated.