摘要
针对多回高压直流馈入、馈出电网,提出了一种基于广域量测数据的系统扰动后稳态频率预测算法,该算法对系统发电机调速器方程、负荷静态模型方程和系统网络方程进行线性化处理,同时考虑到多回高压直流的紧急功率支援量,能快速预测出系统扰动后的稳态频率。针对预测结果,该文设计了基于多回高压直流的最优频率稳定控制策略,该策略利用非线性优化方法,考虑了本区域电网各节点电压稳定约束以及各互联电网频率波动约束,能快速得到各条直流参与系统频率稳定调节的最优紧急直流功率支援量。最后在机电暂态软件PSS/E中,以改进的IEEE 50机系统为例,通过仿真分析,对该文方法的预测结果以及优化结果进行对比验证,证明了所提出方法的正确性和有效性。
Aiming at power grid with multi-send multiinfeed HVDCs, a steady-state frequency prediction algorithm based on wide-area measurement data is proposed. With the linearization of the generator governor equation, the static load model equation and the network equation of system, the algorithm also takes into account the emergency power support of the multiple DC. It can quickly predict the steady-state frequency after the system disturbance. According to the prediction results, an optimal frequency stability control strategy for the power grid is designed in this paper. On the basis of the nonlinear optimal method, this control strategy considers the stability constraints of the regional nodes voltage and the frequency fluctuation constraints of interconnected power grids. It can quickly get the optimal emergency DC power supports of each HVDC system in the process of the frequency regulation. Finally, the improved IEEE 50-machine system is taken as an example in the PSS/E software. The results of the algorithm and the optimization are compared and verified through the simulation analysis. The comparison results show that the proposed method is correct and effective.
出处
《电网技术》
EI
CSCD
北大核心
2018年第1期25-33,共9页
Power System Technology
基金
中国博士后科学基金资助项目(2015M582543)
四川省重点研发计划项目(2017GZ0054)~~
关键词
多直流馈入/馈出电网
广域量测
频率预测
紧急功率支援
频率稳定控制
非线性优化
power grid with multi-send ＆ multi-infeedHVDCs
wide-area measurement
frequency prediction
emergency DC power support （EDCPS）
frequency control
nonlinear optimization
