In the process of real-time simulation of MVDC integrated power system, the traditional system partitioning method is low in efficiency, poor in the stability of decoupling interface, and unsatisfactory in use. In order to solve these problems, a complete set of real-time simulation method is proposed in this paper. The method involves a heuristic system partitioning scheme for the average distribution of switches and the smallest number of subsystems which is obtained by balancing the computational amount and combining the adjacent subsystems, a real-time simulation decoupling interface design method based on the terminal resistance for the purpose of dealing with the poor stability of the traditional ideal transformer interface, and a way to get values of the terminal resistance under the constraints of decoupling stability and accurate calculation. Then, a real-time model of MVDC integrated power system is established. And the proposed real-time simulation method is shown to be of high efficiency and stability on the Rt-lab real-time simulation platform. Compared with the traditional methods, it can greatly improve the accuracy of simulation.

在MVDC集成电力系统的实时仿真过程中，传统的系统划分方法效率低，解耦接口稳定性差，使用效果不理想。为了解决这些问题，本文提出了一套完整的实时仿真方法。该方法涉及一种启发式系统划分方案，该方案通过平衡计算量并结合相邻子系统而获得用于交换机平均分配和子系统数量最少的启发式系统划分方案，以及一种基于终端电阻的实时仿真解耦接口设计方法。处理传统理想变压器接口稳定性差的目的，以及在去耦稳定性和精确计算的约束下获得终端电阻值的方法。然后，建立了MVDC集成电力系统的实时模型。在Rt-lab实时仿真平台上，该实时仿真方法具有较高的效率和稳定性。与传统方法相比，可以大大提高仿真精度。