数模混合实时仿真系统及其在特高压交直流电网研究中的应用

介绍了国家电网仿真中心数模混合式实时仿真系统的结构、仿真试验流程及其在特高压交直流混合电网仿真研究中的应用。该系统包括相应的数字模型、物理模拟装置及接口设备，其中高压直流输电模拟系统模型包含与实际直流输电系统特性相近的仿真装置，且具有与实际直流工程相同的控制保护装置。文章阐述了对原系统的等值化简、确定系统模拟比、建立仿真试验系统模型等多个环节的处理过程及相关原则。以金沙江一期及锦屏送出特高压直流工程实时仿真研究项目为例，给出了数模混合实时仿真系统的试验结果并与离线计算结果进行了比较分析，2者基本一致。仿真系统试验结果可为特高压交直流混合电网的规划提供技术参考。

Digital/Analog Hybrid Real-Time Simulation System and Its Application in Study on Ultra-High Voltage AC/DC Power Grid

The structure and simulation test procedures of real-time digital/analog hybrid simulation system located in State Grid Simulation Center as well as its application in simulation research on UHV AC/DC hybrid power grid are presented. This simulation system includes corresponding digital models,physical simulative devices and interfacing devices,among them the HVDC power transmission analog system model contains such simulative devices whose characteristics are about the same as the characteristics of actual HVDC power transmission system and possess control and protection devices identical to those for actual HVDC project. The processing procedures of many links and related principles,such as the equivalent simplification of original power grid,the decision of proportion of the simulative devices to original power grid,the establishment of simulative test model and so on,are expounded. Taking the real-time simulation research on first-phase construction of Jinshajiang hydropower project and Jinping UHVDC power transmission for example,the test results of digital/analog hybrid simulation system are given and compared with off-line calculation results of the same project,comparison shows that the simulation results are basically identical. Thus,the test results of real-time simulation system are available for technical reference in the planning of UHV AC/DC hybrid power grid.