The wind power has the characteristics of intermittence and volatility. When it penetrates in power system, it will significantly influence the unit commitment of conventional transmission network with thermal units. Aiming at this problem, the method of unit commitment considering wind power paralleling in the power system is presented. Firstly wind active power forecast error statistics is made, and on this basis, its probability distribution model is built. Then, it combines the proposed model with the accumulated outage capacity probability table of traditional thermal unit to form unit accumulated outage capacity probability table considering wind power. Next, the probability table is introduced in the unit commitment Lagrange Relaxation in the way of analytical expression. The unit commitment model with wind power incorporated is formed, and traditional Lagrange Relaxation method is used to solve it. Finally, a real power system is taken as an example to verify the effectiveness of the proposed method.%风电具有间歇性和波动性的特点,其并入电网时会对传统以火电机组为主的机组组合造成明显的影响,针对此问题,提出了计及风电并网的机组组合方法.该方法首先对风电功率预测结果误差进行统计,在此基础上,建立了风电功率预测误差的分布概率模型.然后,该模型与传统火电机组累积停运容量概率表结合,形成了考虑风电功率的机组累积停运容量概率表.接着,将该表以解析表达的方式引入机组组合的拉格朗日松弛法中,形成风电接入后的机组组合模型,并采用传统拉格朗日松弛法进行求解.最后以某实际电网为例,验证了所提算法的优越性.
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