| 引用本文: | 苏森杨,李滨涛,郑宗华,等.基于混合式限流装置提升ISOP-DAB直流系统暂态性能关键技术研究[J].电力系统保护与控制,2026,54(04):101-115. |
| SU Senyang,LI Bintao,ZHENG Zonghua,et al.Key technologies for improving the transient performance of ISOP-DAB DC systems based on hybrid current-limiting devices[J].Power System Protection and Control,2026,54(04):101-115 |
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| 摘要: |
| 为解决双有源桥短路工况下线路阻抗低、电流峰值大、恢复时间长等问题，提出了一种基于耦合电感与高频斩波回路融合的混合式新型限流装置。首先，推导计及新型限流装置的直流系统故障暂态数学模型及限流原理，分析了电阻、电感、变压器变比等关键参数对限流效果的影响。其次，结合电压微分判据实现故障快速检测，并通过对双有源桥出口电压的连续检测，实现永久/瞬时性故障类型的判别，配合直流断路器精准开断。最后，在输入串联输出并联-双有源桥(input series output parallel-dual active bridge, ISOP-DAB)直流系统中针对瞬时/永久性故障与单极/极间短路故障进行仿真实验。实验结果表明：相较于传统限流装置，所提方案可将短路电流峰值降低85%以上，故障隔离时间缩短超40%，在故障电流抑制与系统恢复加速方面表现出优越性能。 |
| 关键词: 双有源桥 故障特性 新型故障限流器 故障限流和隔离 |
| DOI：10.19783/j.cnki.pspc.250482 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(52167010) |
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| Key technologies for improving the transient performance of ISOP-DAB DC systems based on hybrid current-limiting devices |
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SU Senyang1, LI Bintao2, ZHENG Zonghua1, ZHENG Feng1, LIANG Ning3
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1. School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;
2. Yantai Haiyi Software Company Limited, Yantai 264006, China; 3. Faculty of Electric Power
Engineering, Kunming University of Science and Technology, Kunming 650500, China
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| Abstract: |
| To address the challenges of low line impedance, excessive current peaks, and long recovery time under short-circuit conditions in dual active bridge (DAB) converters, this paper proposes a novel hybrid current-limiting device integrating coupled inductors a high-frequency chopper circuit. First, a transient mathematical model of the DC system incorporating the proposed current-limiting device is derived, and the current-limiting principle is explained. The impacts of critical parameters such as resistance, inductance, and transformer turns ratio on the current-limiting performance are systematically analyzed. Subsequently, a voltage derivative criterion is developed for rapid fault detection, while permanent/transient fault discrimination is achieved through continuous monitoring of the DAB output voltage, enabling coordinated operation with DC circuit breakers for precise interruption. Finally, comprehensive simulations are conducted on an input series output parallel-dual active bridge (ISOP-DAB) DC system under transient and permanent faults as well as pole-to-pole/pole-to-ground short-circuit faults. The simulation results demonstrate that, compared with conventional current limiters, the proposed solution reduces the short-circuit current peak by over 85% and shortens the fault isolation time by more than 40%, exhibiting superior performance in fault current suppression and system recovery acceleration. |
| Key words: dual active bridge fault characteristics novel fault current limiter fault current limiting and isolation |
