After the large-scale integration of new energy into the power grid,with the traditional deterministic reactive voltage control,the rapid changes in the output of the new energy and the random changes of loads in the system may lead to occurrence of voltage limit exceeded.Considering the prediction error of new energy and load in the system,the interval method is proposed to carry out the dynamic reactive power and voltage control for the new-type power system in three typical scenarios considering active and reactive power control of inverters in energy storage and new energy station,so as to minimize the active power loss and voltage deviations of the system;power and energy constraints of energy storage are considered in the dynamic reactive power optimization control;special consideration is given to the climbing constraints of synchronous units and the frequency regulation effect of hydro and thermal units in actual regulation in the control model;and the model is solved by a general algebraic modeling system(GAMS)mixed integer nonlinear programming solver based on the standard branch and bound method.The control effect of the proposed method is verified in a 128-bus system,which significantly reduces the degree and occurrence of voltage limit violations under various random scenarios,and effectively addresses the random change of new energy and load.
关键词
动态无功电压控制/新能源场站/区间法/储能
Key words
dynamic reactive power and voltage control/new energy station/interval method/energy storage
维普
万方数据