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1 农村低压现有的供电方式及弊端 目前,我国农村绝大部分采用一台变压器以三相四线制、动力和生活混用的供电方式。这种供电方式有以下弊端: 1.1 不经济。农村用电季节性强,负荷变化大。使用小容量变压器农忙时供不应求;使用大容量变压器农闲时变压器空载运行,线损大,电价高。 1.2 电压低。农村用电负荷分散,低压供电半径长,配电变压器相间负荷不能均衡,线损高,电压低。 1.3 难管理。农村用电分散,设备健康水平低,跳闸次数多,查找事故点难度大。
A rural low voltage existing power supply methods and drawbacks At present, most of the country’s rural areas using a transformer to three-phase four-wire system, power and life mix of power supply. This power supply has the following drawbacks: 1.1 uneconomical. Seasonal rural electricity, load changes. Use of small-capacity transformers in short supply when busy; use of large-capacity transformers when the transformer idle load running, large loss, high price. 1.2 low voltage. Rural electricity load dispersion, low voltage power supply long radius, distribution transformer phase load can not be balanced, high line loss, low voltage. 1.3 difficult to manage. Rural electricity scattered, low level of equipment health, the number of trips more difficult to find the accident point.