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配电网是电力系统中二次降压变电所低压侧直接或经降压后向电能用户供电的网络。通常由架空线或电缆配电线路、配电所或柱上降压变压器及用户用电设备构成。按其配电的额定电压 U_N 可分为高压配电网(U_N>000V)和低压配电网(U_N<1000V)。由于配电网深入城市中心的居民密集点,传输功率和距离一般不大,供电容量及用户性质、供电质量和可靠性要求各异,以及配电网中性点工作方式特点等原因,要求我国配电网及自动化系统的改造,必须符合我国配电网的实际情况逐步进行。
The distribution network is a network in which the low-voltage side of the second step-down substation in the power system is directly or depressurized to supply the electric energy users. Usually by overhead lines or cable distribution lines, distribution substations or on-column step-down transformers and consumer electrical equipment. According to the distribution of the rated voltage U_N can be divided into high voltage distribution network (U_N> 000V) and low voltage distribution network (U_N <1000V). Due to the in-depth distribution of urban residents in densely populated urban centers, the transmission power and distance are generally small, power supply capacity and user properties, power supply quality and reliability requirements vary, as well as the distribution network neutral point of work characteristics and other reasons, Distribution network and automation system transformation, must be in line with the actual situation of China’s distribution network and gradually.