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Research on Modeling of Flexible Closed-loop System of Distribution Network Based on Back-to-Back ANPC
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Biao CHEN1, Zhongxiu HAN2, Liqiang MA1, Renhe ZHANG3
Electric Drive | 2025, 55(7) : 54 - 63
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Electric Drive | 2025, 55(7): 54-63
Research on Modeling of Flexible Closed-loop System of Distribution Network Based on Back-to-Back ANPC
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Biao CHEN1, Zhongxiu HAN2, Liqiang MA1, Renhe ZHANG3
Affiliations
  • 1. State Grid Ningxia Electric Power Co.，Ltd. Guyuan Power Supply Bureau，Guyuan 756000，Ningxia，China
  • 2. NARI Nanjing Control System Co.，Ltd.，Nanjing 211106，Jiangsu，China
  • 3. State Grid Ningxia Electric Power Co.，Ltd.，Yinchuan 750001，Ningxia，China
Published: 2025-07-20 doi: 10.19457/j.1001-2095.dqcd26023
Outline
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The back-to-back active neutral-point-clamped（ANPC）converter，as the core component of the unified power flow controller of the distribution network，is widely used for the flexible closed-loop operation.However，the ANPC converter has more switching devices and commutation paths，which significantly increases the complexity of modeling.To solve the above problems，an average modeling method of the ANPC converter was proposed.The controlled source equivalent substitution method was used to replace the switching devices.The resistance-capacitance-inductance devices of other parts of the circuit were retained while averaging each branch，which greatly simplified the circuit model of the ANPC converter. On this basis，combined with the flexible control principle based on back-to-back ANPC converters，the average model of a back-to-back ANPC flexible control system was further built. By comparing the simulation results of the switch model and the average model，it was shown that the average model was consistent with the switch model in the internal branch and external characteristics，which verified the correctness and accuracy of the proposed average model and its feasibility in the application of flexible closed-loop system.

back-to-back active neutral-point-clamped（ANPC）converter  /  flexible closed-loop  /  controlled-source equivalent substitution method  /  average model
Biao CHEN, Zhongxiu HAN, Liqiang MA, Renhe ZHANG. Research on Modeling of Flexible Closed-loop System of Distribution Network Based on Back-to-Back ANPC[J]. Electric Drive, 2025 , 55 (7) : 54 -63 . DOI: 10.19457/j.1001-2095.dqcd26023
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Year 2025 volume 55 Issue 7
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Article Info
doi: 10.19457/j.1001-2095.dqcd26023
  • Receive Date：2024-06-26
  • Online Date：2025-10-29
  • Published：2025-07-20
Article Data
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History
  • Received：2024-06-26
  • Revised：2024-08-11
Funding
Affiliations
    1. State Grid Ningxia Electric Power Co.，Ltd. Guyuan Power Supply Bureau，Guyuan 756000，Ningxia，China
    2. NARI Nanjing Control System Co.，Ltd.，Nanjing 211106，Jiangsu，China
    3. State Grid Ningxia Electric Power Co.，Ltd.，Yinchuan 750001，Ningxia，China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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