抽水蓄能站对电网负荷稳定性优化控制仿真

发布时间：2018-03-27 10:40

本文选题：电网　切入点：抽水蓄能站　出处：《计算机仿真》2017年05期

【摘要】：对抽水蓄能站对电网负荷稳定性进行合理控制,可减轻抽水蓄能站的总负荷,使蓄水站稳定运行。对电网无功电流进行控制是整个电网负荷稳定性控制的关键,需要计算蓄水站正常运行时电网的电流无功功率平衡关系方程,组建抽水蓄能站电网无功电流控制模型,但是传统方法通过减少电压畸变或电流畸变,消除不同控制参数对抽水蓄能站电网负荷的影响实现稳定性控制,不能对负荷控制最关键的电流无功功率平衡关系进行有效分析,无法建立精确的无功电流控制模型,降低了电网负荷稳定性控制的效果。提出一种双馈调速的抽水蓄能站电网无功电流控制方法,对电网负荷稳定性优化控制。用上述方法先计算出电网无功功率的控制参考量,得到波动性负荷或可再生能源发电功率的测量值与预测值之差,通过增添附加项用于电网振荡阻尼,给出发电模式下电网的电流无功功率平衡关系方程,组建抽水蓄能站电网无功电流控制模型,利用改进模型对抽水蓄能站电网无功电流控制,完成电网负荷稳定性优化控制。仿真结果表明,改进方法可以有效地实现对抽水蓄能站对电网负荷稳定性优化控制,误差小且鲁棒性强。
[Abstract]:The reasonable control of the power network load stability of the pumped storage station can reduce the total load of the pumped storage station and make the storage station operate stably. The control of the reactive power current is the key to the load stability control of the whole power network. It is necessary to calculate the balance equation of current and reactive power during the normal operation of water storage station, and to set up the reactive current control model of pumped storage station, but the traditional method can reduce voltage distortion or current distortion. To eliminate the influence of different control parameters on the power network load of pumped storage station, the stability control can not be realized, and the most critical relationship of current and reactive power balance can not be effectively analyzed, and an accurate reactive current control model can not be established. The effect of load stability control is reduced. A doubly-fed control method for reactive current in pumped storage station is proposed, which can optimize the load stability of power network. The control reference of reactive power is calculated by using the above method. The difference between the measured value and the predicted value of the fluctuating load or renewable energy generation power is obtained. By adding additional items to the oscillation damping of the power grid, the equation of current and reactive power balance under the generation mode is given. The reactive current control model of pumped storage station network is established, and the reactive power current control of pumped storage station network is achieved by using the improved model. The simulation results show that the optimal control of load stability is achieved. The improved method can effectively realize the optimal control of power network load stability for pumped storage stations with small error and strong robustness.
【作者单位】：国网新疆电力公司经济技术研究院;
【分类号】：TV743

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