机电-电磁暂态混合仿真在电网合环分析中的应用研究

Application Research of Electromechanical and Electromagnetic Transient Hybrid Simulation in Loop Closing Analysis of Power Grid

电网带电合环是提高供电可靠性以及保障系统供电质量的一种重要方法。分析了纯机电暂态仿真和电磁暂态仿真的优缺点,研究并提出了适合机电-电磁暂态混合仿真的网络等效方法和接口技术实现过程,在此基础上,提出基于PSASP平台的电网合环仿真计算系统设计思路。该系统运用机电暂态-电磁暂态混合仿真的方法来判断合环条件,既可以反映特定系统中详细的电磁暂态变化过程,又可仿真较大规模的电力系统,无需等值且准确性较高。

Live loop closing in power grid is a vital way to improve the reliability of power distribution and ensure the quality of power supply. The advantages and disadvantages of the pure electromechanical transient simulation and the pure electromagnetic transient simulation are analyzed. The network equivalent method and the implementation process of interface technology suitable for electromechanical and electromagnetic transient hybrid simulation are studied and proposed. On this basis, the design ideas about simulation system of loop closing in power grid are put forward based on the PSASP platform. The system utili- zes electromechanical - electromagnetic hybrid simulation to judge the condition of loop closing, which can not only reflect the electromagnetic transient state process but also can highly precisely simulate the large - scale system without equivalence.