降压节能技术研究综述

摘要:

降压节能(conservation voltage reduction,CVR)是一种欧美电力机构普遍使用的通过降低配电系统电压水平来降低峰荷时期负荷需求并实现能源节约的技术。近年来,国内许多地区的电网都存在峰荷时期供电容量不足的问题,导致部分用户断电,造成较大的经济损失。如果单纯的通过扩大发电机组装机容量来解决问题,投入较高,并且在用电低谷时会出现发电机效率低下的问题,而降压节能技术能够经济有效地解决该问题。首先对CVR技术的发展历程进行简单回顾;随后介绍CVR技术相关的定义及其主要实现方法;然后对该技术的效益量化评估方式进行总结与对比,并对分布式电源与CVR技术的相互关系进行分析与讨论;最后结合国内配电网实际情况对CVR技术在中国的实际运用进行探讨。

Abstract:

Conservation voltage reduction ( CVＲ) technique can reduce the peak demand and achieve energy saving via voltage level reduction of distribution system，which is widely used by the power utilities of the US and Europe． In recent years，the supply capacity of domestic distribution network fails to meet the peak demand，and CVＲ is an economical and effective way to solve this problem． Firstly，the development of CVＲ is reviewed and the related concepts are introduced． Then，a summary and the comparison of the assessment methods of CVＲ are provided． Besides，the relationships and impacts between CVＲ and distributed generators are analyzed． Discussion about the application of CVＲ in China is included in the end．