电力系统割集空间静态电压稳定域的可视化及实现

Visualization of the Static Voltage Stability Region in Cut-sets Space of Power Systems

安全域的可视化可以提高电力系统的可观测性,帮助调度人员快速估计系统当前的安全状态,针对应采取的预防性措施做出正确的预断。介绍了静态电压稳定域可视化系统的理论与数值仿真依据,以及在河南电网调度通信中心能量管理系统(EMS)上的可视化软件的开发情况。该软件包以定时获取SCADA实时量测数据为基础,快速计算关键断面在割集功率空间中的潮流传输极限边界,并采用OpenGL 3D图形开发技术首次实现了电力系统稳定域在EMS上的可视化,为运行调度人员提供了系统电压稳定性测度的直观显示。由于避免了大规模的连续潮流计算,每个计算周期在几秒至几分钟内(由网络规模大小决定)即可完成,因此在线电压稳定性监视功能得以实现。软件包在Digital UNIX操作平台上开发,对多种UNIX系统具有很好的兼容性和可移植性,为在新一代EMS中嵌入该功能模块奠定了良好的基础。

The visualization of the security region can improve the observability of power systems and help with quick security assessment of the current operation point and decision-making of preventive measures. The visualization system for the static voltage stability region is described, including its theory, numerical simulation basis, and the software development based on the energy management system (EMS) of Henan Electric Power Dispatching and Communication Center. This software package calculates the boundaries of power transmission limits in cut-set power space according to the data of SCADA and visualizes these boundaries using the OpenGL 3D graphic programming techniques. It provides operators with voltage stability in measurement in an intuitive way. By avoiding large-scale continuous power flow calculation, each calculation period can be completed within seconds or minutes, realizing real time voltage stability monitoring and assessment. The software package is implemented on Digital Unix, which is compatible and portable with several different kinds of UNIX operating systems. This work presents a basis for further combination of this functional module with the new generation of EMS.