在线静态灵敏度分析软件在南方电网的应用

Application of On-Line Static Sensitivity Analysis Software in China Southern Power Grid

在线静态灵敏度分析是能量管理系统(energy management system,EMS)高级应用软件的重要组成部分。中国南方电网电力调度通信中心EMS中的在线静态灵敏度分析需要对5省区220 kV交直流混联电网的全模型进行计算,需要综合考虑5省区发电机组不同的物理响应和交直流电网的互相影响,并需要具有良好的计算收敛性。采用了考虑PV与PQ节点特性的交直流混联灵敏度算法来解决上述问题。考虑了准稳态发电机物理响应特性的算法可以给出交流元件之间的灵敏度和交直流元件之间的灵敏度。该软件已在中国南方电网电力调度通信中心EMS稳定有效运行3a以上,对于调度控制工作具有较强的实用性。

Online static sensitivity analysis is one of the important constituent component in advanced application software for energy management system （EMS）. To carry out online static sensitivity analysis in the EMS of dispatching center of China Southern power Grid （CSG）, it is needed to make calculation of the full model of 500 kV/220 kV AC/DC hybrid power gird covering five provinces and districts, so it is necessary to consider various physical responses of generators in these provinces and districts and the interaction between AC and DC power networks, in addition, the good covergence of the calculation is to be ensured. To meet above-mentioned demands, the sensitivity algorithm for AC/DC hybrid power grid, in which the characteristics of PV and PQ nodes is taken into account, is adopted. The algorithm that considers quasi-steady physical response characteristics of generators can give sensitivity among AC components and that among AC and DC components. The presented online static sensitivity analysis software has been steadily and efficiently operated in the EMS of dispatching center of CSG more than three years, and operation experiences of this software show that it is practicable for scheduling and control of dispatching center.