【摘要】 电网电压无功优化运行自动控制过程中,由于负荷的波动会造成各变电所电容的投切和有载主变分接头调节振荡或者不必要操作。为避免设备不必要的操作,延长设备的运行寿命,在电网电压无功优化运行自动控制的基础上,引入短期和超短期负荷预报技术,在每日开始的时刻预测当日的负荷曲线,划分出高峰、低谷、腰荷时间段,并对每一个状态断面后若干时间(如15min)的电网负荷状况进行超短期预报,实现电网电压无功优化运行与调节设备动作次数的最佳组合,提高系统电压稳定性,降低网损,减少设备动作次数。更多还原

【Abstract】 In order to resolve the problem of the surge and time delay of adjustment for capacitor and transformer in the process of optimal con-trol of voltage and reactive power in the whole power network, to avoid unnecessary action of voltage adjustment and reactive-load compen-sation equipment, and to extend service life of equipment, an optimal and centralized control for reactive power/voltage is introduced basedon the load forecast. By forecasting load of the whole network in every transient cross-section’s next 15 th minutes, optimal control of voltageand reactive power in the whole power network and the numher of adjustment can be implemented at an optimal state, as a result, the powersystem voltage stabilization can be improved, loss of network and the number of adjustment can be decreased.更多还原