基于虚拟线路补偿的主动配电网混合仿真接口实现方法

数字物理混合仿真是未来主动配电网仿真分析的有效手段，而接口算法是确保其系统稳定性和精确性的关键。针对现有接口算法无法适用于主动配电网混合仿真的问题，文中提出一种基于虚拟线路补偿的改进功率接口算法。首先，在分析理想变压器法结构与稳定条件的基础上，提出在数字侧与物理侧间增设一条虚拟线路。然后，基于线路上虚拟电流对系统进行稳定性补偿，并给出了线路阻抗的取值范围。同时，针对接口固有延迟及稳定性补偿引入的误差，提出根据虚拟线路上流过的虚拟功率对接口两侧的相位差进行补偿，以保证精确性。最后，通过仿真和实验将所提方法与现有算法相比较，验证了所提方法在提升主动配电网混合仿真系统稳定性及精度上的有效性和优越性。

Implementation method of hybrid simulation interface for active distribution network based on virtual line compensation

Digital physical hybrid simulation is an effective means of active distribution network simulation and analysis, and interface algorithm is the key to ensure the stability and accuracy of the system. Aiming at the problem that the existing interface algorithm cannot be applied to the hybrid simulation of active distribution network, an improved power interface algorithm based on virtual line compensation is proposed in this paper. Firstly, based on the analysis of the structure and stability conditions of the ideal transformer method, a virtual line is proposed between the digital side and the physical side. Then, the stability of the system is compensated based on the virtual current on the line, and the range of line impedance is given. At the same time, in order to ensure accuracy and reduce the error caused by the inherent delay and stability compensation of the interface, a method based on virtual power to compensate the phase difference on both sides of the interface is proposed. Finally, the proposed method is compared with the existing algorithms by simulation and experiment. The results show that the proposed method is effective and superior in improving the stability and accuracy of the hybrid simulation system of active distribution network.