计及子网惯量差异的互联变流器暂态功率补偿控制策略

施凯; 曹保峰; 徐培凤; 杜怿; 张小伟

doi:10.16513/j.2096-2185.DE.25100239

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分布式能源 ›› 2026, Vol. 11 ›› Issue (1) : 44-53. DOI: 10.16513/j.2096-2185.DE.25100239

智能配电与微网

计及子网惯量差异的互联变流器暂态功率补偿控制策略

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Transient Power Compensation Control Strategy for Interlinking Converter Accounting for Subnet Inertia Differences

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摘要

新型电力系统的构建要求混合微电网(hybrid microgrids, HMG)具备惯量支撑能力，虚拟同步发电机技术(virtual synchronous generator, VSG)的应用使得子网呈现不同的惯量特性，负荷波动时互联变流器 (interlinking converter, ILC)使交直流母线电气特性相互耦合，导致ILC传输功率振荡，影响系统动态稳定，为此提出了计及子网惯量差异的ILC暂态功率补偿控制。首先，建立了交直流子网的归一化等值VSG模型，评估子网的等值惯量水平；其次，将子网等值惯量引入暂态功率补偿控制器，向ILC注入暂态补偿功率，抑制传输功率的振荡，减小母线电气量变化率越限风险；最后，基于Matlab/Simulink平台搭建了仿真模型，在多种工况下验证了所提控制策略的有效性。与现有控制策略相比，所提控制策略能够实现系统整体的功率协调与负荷均担，交直流母线电气量变化率跌落得到缓解，ILC传输功率更加平滑，系统动态性能有所改善。

Abstract

The construction of new power system requires hybrid microgrids (HMG) to have inertia support capability, the application of virtual synchronous generator (VSG) technology makes the sub-grids present different inertia characteristics, and the interlinking converter (ILC) makes the electrical characteristics of AC and DC buses coupled with each other during load fluctuation, resulting in ILC transmission power oscillation, which affects the dynamic stability of the system, therefore, the ILC transient power compensation is proposed to take into account the difference in inertia of sub-grids. During load fluctuation, the ILC couples the electrical characteristics of the AC and DC buses, which leads to the oscillation of the ILC transmission power and affects the dynamic stability of the system, therefore, the transient power compensation control of the ILC that takes into account the inertia difference of the sub-networks is proposed. A normalized equivalent VSG model of the AC-DC subnetwork is established to evaluate the equivalent inertia level of the subnetwork. The subnetwork equivalent inertia is further introduced into the transient power compensation controller to inject transient compensation power into the ILC to suppress the oscillation of the transmitted power and reduce the risk of overrun of the bus electrical quantity change rate. A simulation model is built based on the Matlab/Simulink platform, and the effectiveness of the proposed control strategy is verified under various operating conditions. Compared with the existing control strategy, the proposed control strategy can realize the overall power coordination and load sharing of the system, the drop of the AC/DC bus electric quantity change rate is mitigated, the ILC transmission power is smoother, and the dynamic performance of the system is improved.

导出引用

施凯, 曹保峰, 徐培凤, 等. 计及子网惯量差异的互联变流器暂态功率补偿控制策略[J]. 分布式能源, 2026, 11(1): 44-53 https://doi.org/10.16513/j.2096-2185.DE.25100239.

SHI Kai, CAO Baofeng, XU Peifeng, et al. Transient Power Compensation Control Strategy for Interlinking Converter Accounting for Subnet Inertia Differences[J]. Distributed Energy, 2026, 11(1): 44-53 https://doi.org/10.16513/j.2096-2185.DE.25100239.

中图分类号： TK 01; TM 727

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