基于组合赋权法的风电场无功电压控制能力综合评估

Comprehensive evaluation of the reactive power and voltage control capability of a wind farm based on a combined weighting method

为评估风电场无功电压控制能力,构建了风电场无功电压控制能力双层评估体系,介绍了一种基于概率统计的指标量化分级方法。基于标度扩展的层次分析法和优序图法两种主观赋权、熵权法和变异系数法两种客观赋权,采用以偏差最小为目标的组合赋权法优化权重,对湖南某实际风电场的无功电压控制能力进行综合评估,验证了评估方法的有效性。评估结果可反映风电场无功电压控制能力的整体情况,且组合权重能兼顾主观权重与客观权重的优点.

In order to assess the reactive power and voltage control capability of a wind farm,this paper builds a wind farm reactive power and voltage control double evaluation system,and introduces a quantitative classification method based on probability statistical indicators.Then,two subjective weights are obtained by a scale-extending analytic hierarchy process and precedence chart,and two objective weights are obtained by entropy weight and the coefficient of variation method.The weight is optimized by the combined weighting method aiming at the minimum deviation.The reactive power and voltage control capability of a real wind farm in Hunan Province is comprehensively evaluated.The effectiveness of the proposed evaluation method is verified.The evaluation results can reflect the overall situation of the reactive power and voltage control capability of the wind farm.In addition,the combined weights can take the advantage of subjective and objective weights into account.