大规模风电并网与直流运行交互影响仿真分析

Simulation analysis on interaction of large scale wind power integration and DC operation in power grid

为了研究大规模风电集中接入,高比例风火、电打捆外送给交直流混合电网稳定运行带来的风险,通过建立典型风、火电打捆交直流外送系统模型,从风机无功控制模式,风电场动态无功补偿,风、火电打捆比例以及直流闭锁故障等方面仿真分析了交直流混合电网中风电与直流运行的交互影响。仿真结果表明:风、火电打捆外送的交直流混合电网需要配备一定比例的常规电源,常规电源的强惯量和优良的无功电压支撑能较好地支持新能源发电并网运行,有利于降低电网系统电压的波动,减缓新能源发电波动性对电网直流运行的影响,提升电网直流运行的可靠性。

In order to research the large scale wind power centralized access, high proportion wind power and thermal power blending transmission bring the steady operation risk for AC/DC hybrid power grid, establishes representative wind power and thermal power blending, AC/ DC hybrid transmission system model, analyzes the interaction of wind power and DC operation of AC/DC hybrid power grid, from reactive power control mode of wind generator, dynamic reactive power compensation of the wind farm, proportion of wind power and thermal power and DC blocking failures. The simulation result shows that wind power and thermal power blending transmission needs a percentage of regular power source. The strong inertia of the regular power source and fine reactive power can support volatility of new energy integration operation. It is beneficial to reduce the voltage fluctuation of power grid system, alleviates the impact of new energy power generation fluctuation for power grid DC operation and promotes the DC operation reliability of power grid.