城市住宅用电负荷及变压器容量确定.doc

1 城市新建住宅项目用电负荷计算及变压器容量选择杨志强 1舒伟 2(昆明供电设计院云南昆明 650011 ) (云南电网公司昆明供电局云南昆明 650011 ) The Urban Newly Built Housing Project Uses Electricity The putation And The transformer Capacity Choice Yang Zhiqiang Shu Wei Abstract: With the national standard ofliving and the booming real estate development, new residential quarters inmore and more high-end. Engineering design ofresidential quarters inthe power supply standard asaresult of non-uniform load, the transformer capacity, transformer facilities with inappropriate choice ofthe mon phenomenon. urately calculate the load ofresidential quarters, areasonable choice with substation facilities tomeet the electricity needs ofdistrict residents, but also reduce the project cost reasonable, investment savings, reduce operation and maintenance work and toimprove equipment utilization. Key words: Residential quarters, electricity indicators, need tofactor, load rate, choice oftransformer capacity, the design ofdistribution lines 摘要: 随着国民生活水平的提高和房地产业的蓬勃发展,新建中高档住宅小区越来越多。住宅小区供电工程设计中由于负荷计算标准不统一,变压器容量、配变电设施选择不当的现象较普遍。准确计算住宅小区的用电负荷,合理选择配变电设施,才能既满足小区居民的用电需要,又能合理降低工程造价、节省投资,减少运行维护工作和提高设备的利用率。关键词: 住宅小区、用电指标、需要系数、负载率、变压器容量、配电线路设计一、概述选择合理的变压器容量和台数,使变压器的负载率恰当,是降低工程造价,提高变压器效率,降低损耗的必要措施。变压器的负载率过低或过高, 都会使变压器效率降低。当前主要的问题是由于建筑物内的功能繁多,受用户对象、气候条件、社会经济发展程度、生活工作特点等因素影响,要准确进行负核计算难度很大。负荷计算不准确,变压器的容量及其他配变电设备的选择也就很难合理。为提高和改善城市居民用电的安全性、稳定性,为新建住宅完成居民用电“一户一表”移交创造有利条件,结合《昆