中大型城市变电站站用电节电改造及其效益量化方法

Quantitative Analysis Method of Electricity-Saving Rebuilding and Benefit for Medium and Large City Substations

针对中大型城市变电站数量众多、类型复杂、节电效益难以量化计算等问题,提出了一种中大型城市变电站节电改造及其效益量化分析方法。首先,详细分析与变电站站用电相关的影响因素,建立了涵盖变电站电压等级、电气设备布置方式等基本参数和输送电量、站用电量等电气参数的节电指标体系,将具有相似节电特性的变电站聚类划分为同一类别。其次,以变电站的空调和照明系统为节电研究对象,综合分析其用电规律和运行特性,将变电站不同场所的空调和照明设备分别归纳为3类和5类,极大简化了后续的节电量化计算。最后,考虑全生命周期设计节电效益指标,量化评估变电站的节电潜力。以某中大型城市变电站为例验证了所提方法的合理性和有效性。

A quantitative analysis method for electricity-saving and benefit of medium and large city substation was presented to address the problem of calculating electricity-saving benefit of numerous and various substations. Firstly, it designed the electricity-saving index system which includes the basic property index sub system and the electrical property index sub system, dividing the substation with similar electricity-saving characteristics into the same class. The basic property index sub system covers the substation＇ s basic parameters, such as voltage level, the number of main transformer. The electrical property index sub system covers the substation＇ s electrical parameters, such as transmitted power. Secondly, based on the comprehensive analysis of the electricity consumption and operating characteristics of the air-conditioning and lighting in various typical substations, air-conditioning and lighting were divided into 3 and 5 classes, which greatly simplifes the subsequent calculation of quantitative electricity-saving. Ultimately, taking into account the remanent value of equipment, electricity-saving alteration investment,the paybaek period and so on, an electricity-saving benefit analysis method considering the whole life cycle was designed. It took a large city substation as example which shows that the method proposed in this paper is reasonable and effective.