电力系统机电暂态和电磁暂态混合仿真接口算法

传统的机电暂态或电磁暂态程序在分析日益复杂的大规模电力系统时,已开始显露出各自的局限性.将两者联合起来进行混合仿真,可以较好地解决仿真的规模、速度和精度的协调问题,这为研究电力系统的稳定性和动态特性提供了新的解决思路.文中系统研究了混合仿真中的接口算法,对机电侧和电磁侧的等值参数求取、等值电路形式及变换、电磁侧的基波等值复阻抗求解方法、机电侧正负序阻抗不等引起的不对称、电磁侧离散序列的基波提取等问题进行了深入分析,并且给出了具体的实现方案,为混合仿真平台的程序设计提供了坚实的理论依据.

An Interface Algorithm in Power System Electromechanical Transient and Electromagnetic Transient Hybrid Simulation

Conventional electromechanical transient or electromagnetic transient simulators each have their disadvantages and limitations in simulating increasingly large-scale power systems. It is shown that by combining two kinds of simulators to make hybrid simulation, the scale, velocity and precision of calculation can be improved. It also provides a new solution for research on power system transient stability and dynamic characteristics. The key algorithm for dealing with the interface in hybrid simulation is presented in this paper. The solution to equivalent parameter and method of equivalent circuit for two kinds of simulators are discussed. In particular, a new method is presented for solving the equivalent fundamental frequency complex impedance according to the existing post difference nodal admittance real matrix. In addition, the problem about asymmetric impedance matrix in electromechanical transient simulators and fundamental extraction in electromagnetic transient simulators are also discussed and analyzed at length, providing the specific scheme of implementation and laying a solid theoretical foundation for program design of the hybrid simulation system.