针对风电、光伏等可再生能源不断并入电网,以及特高压直流的大力发展,使电网的规模越来越大从而增加了电网无功电压的控制难度的问题,提出了采用蒙特卡洛方法模拟电网实际运行状态,使用非线性最小二乘回归方法获得了有功损耗与节点有功注入、无功注入之间的权重,从而形成了电网有功损耗模型。针对该模型,以电网有功损耗为目标,通过对电网中的各个节点进行了分区优化,从而获得了最符合电网运行实际的节点分区结果。对IEEE39母线系统进行仿真测试。结果表明,所提方法能够实现98%的电压预测精度,说明该电网简化方法有助于提高新形势下电网无功电压的监视和控制精度。 For the wind power, photovoltaic and other renewable energy continue to be incorporated into the grid, and the development of UHVDC, so that the scale of the grid is increasing and thus increase the power grid voltage control difficult problem, proposed Monte Carlo method simulation The active power loss of the grid is obtained by using the nonlinear least squares regression method, and the weight between active power loss and node active power injection and reactive power injection is obtained. Aiming at the model, the nodes in the power grid are optimized by dividing the nodes in the power grid, and the results of the node partition which accord with the actual operation of the grid are obtained. Simulation of IEEE39 bus system. The results show that the proposed method can achieve 98% voltage prediction accuracy, indicating that the simplified method of the grid can help improve the monitoring and control precision of reactive power and voltage in the new situation.
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