成本效益分析在电能质量经济评估中的应用

Application of Cost Benefit Analysis in Economic Evaluation of Power Quality

为了更好地改善电能质量,首先提出了电能质量经济评估的概念。从工程项目的角度,将电能质量的经济评估的过程分为四个部分,分别为:对电能质量状况进行评估;与电能质量问题相关的费用的估计;对电能质量改善方案的费用和效果的评估;电能质量改善方案的成本效益分析及确定。第四部分中,对改善方案进行成本效益分析后,提出采用年值法在技术效率和经济效率之间提供最佳的配合,选择出最恰当的技术方案。经分析表明,电能质量经济评估非常必要,经济评估过程清晰。从成本效益的角度出发,应用年值法确定改善方案具有可操作性,能够满足实际应用的需要。最后,一个包装纸制造企业的例子也说明了一点。

Aiming at the improvement of power quality(PQ), this paper firstly proposes a concept of economic evaluation of PQ, and then proposes an evaluation procedure from the viewpoint of a project.The procedure divides the entire process of economic evaluation into four parts:(a)evaluation of the status of PQ;(b) evaluation of the costs related to PQ;(c)evaluation of the costs and effectiveness of implementation of various strategies for PQ improvement; and (d) cost benefit analysis and selection of PQ improvement strategy. This paper also suggests a method for the selection of the best PQ improvement strategy based on the cost benefit analysis of all feasible strategies. This method adopts AW to balance between the technical efficiency and economic efficiency. The analysis indicates that the economic evaluation of PQ is necessary and the proposed economic evaluation procedure is clear and easy to follow.Taking into account both the cost and benefit, it has been convinced by an example of wrapping paper manufactory that it is feasible to adopt AW for the selection of a PQ improvement strategy.