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1提高配电网功率因数 无功功率是保证电力变压器和交流电动机正常工作的条件之一.它在电网上传输将使电网功率因数减小,线损电量增大,受电端电压降低,电能质量下降.因此提高电网功率因数是降损节能的途径之一.美、英、日等工业发达国家电网功率因数负荷高峰时为O.95,低谷时为1.我国目前大部分10kV和35kV农村配电网功率因数为O.7左右.如果通过分层就地无功补偿,将功率因数提高到0.95,则电网电流将减少26%左右,线报电量将减少45%左右.
1 Improving the power factor reactive power of distribution network is one of the conditions for ensuring the normal operation of power transformers and AC motors. It will reduce the power factor of the power grid, increase the power loss of the power line, reduce the voltage at the power receiving end, and transmit power on the power grid. The quality is declining. Therefore, increasing the power factor of the power grid is one of the ways to reduce energy consumption. In the industrialized countries such as the United States, Britain, and Japan, the power factor load factor of the power grid is O.95 at the peak, and it is 1. at the trough. Most of the 10kV and 35kV rural areas in China are present. Distribution network power factor is O.7 or so. If the power factor is increased to 0.95 through layered in-place reactive power compensation, the grid current will be reduced by about 26%, and the line power will be reduced by about 45%.