电能质量治理经济评估方法适用性分析与改进

Applicability Analysis and Improvement on Economic Evaluation Method of Power Quality Control

电能质量治理效益属于降低未知损失的非直接利益,具有不确定性与难以估计的特点,对治理方案经济性评估方法的适用性及评估结果带来了极大的不确定性。本文首先介绍了电能质量治理方案的经济性评估流程,以及在经济性评估领域较为成熟的净现值法、投资回收期法和在投资评估中应用的内部收益率法及全寿命周期成本法,给出了4种方法的评价指标,并对各方法在电能质量治理方案经济性评估上的适用性进行了详细分析。考虑到内部收益率法和净现值法具有较好的表现力,本文选择净现值法,就电能质量治理间接效益不确定问题,提出一种计及治理效益风险的改进净现值评估方法。最后针对某半导体器件制造业用户,以UPS与DVR为例,验证了本文的适用性分析及所提改进方法的有效性。

The efficiency of power quality control belongs to the non-direct interest reducing unknown loss and has such features as uncertainty and difficult estimation and brings great uncertainty for the applicability and evaluation result of economic evaluation method of the control scheme. In this paper, the economic evaluation process of the power quality control, net present value method which is mature in the economic evaluation area,investment recovery method,internal return rate method and whole life cycle cost method which are applied in the investment evaluation are introduced firstly. The valuation index of the four method is given and applicability of the above each method in the economic evaluation of power quality control scheme is analyzed in detail. Considering better performance of internal return rate method and the net present value method,the latter is selected and a kind of evaluation method of improving the net present value which is related to efficiency risk control is proposed for the uncertainty problem of indirect efficiency of power quality control. Finally both the applicability analysis and effe- ctiveness of the proposed method in this paper is verified with UPS and DVR as example for certain semi-conductor element manufacturer.