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In order to solve the problem of voltage over-limit caused by distributed generation connected to distribution network, an optimal control method based on AC/DC hybrid architecture was proposed in this paper. The IEEE 33-node AC/DC hybrid model including PV, energy storage and converter was constructed, and a four-stage time-division optimization strategy was designed. According to the difference of PV output and load characteristics, the island/grid-connected mode was adopted. Slack variables and two-stage solution algorithm were introduced to ensure the feasibility of the model, and voltage fluctuations were suppressed through the cooperative control of converter and energy storage. The simulation results show that the voltage over-limit nodes are zeroed out, the photovoltaic consumption rate is significantly improved, and the contribution rate of peak and valley filling of energy storage is significantly increased, which provides support for the voltage stability and economic operation of the distribution network with a high proportion of renewable energy access.

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Research on Node Voltage Carrying Capacity of Typical Distribution Network After Distributed Generation Access

  • 会议论文

  • 发表日期：

    2026年

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  • Wenping Qiu,
  • Shuhong Fan,
  • Xingxin Cheng,
  • Zhisheng Lv

摘要

In order to solve the problem of voltage over-limit caused by distributed generation connected to distribution network, an optimal control method based on AC/DC hybrid architecture was proposed in this paper. The IEEE 33-node AC/DC hybrid model including PV, energy storage and converter was constructed, and a four-stage time-division optimization strategy was designed. According to the difference of PV output and load characteristics, the island/grid-connected mode was adopted. Slack variables and two-stage solution algorithm were introduced to ensure the feasibility of the model, and voltage fluctuations were suppressed through the cooperative control of converter and energy storage. The simulation results show that the voltage over-limit nodes are zeroed out, the photovoltaic consumption rate is significantly improved, and the contribution rate of peak and valley filling of energy storage is significantly increased, which provides support for the voltage stability and economic operation of the distribution network with a high proportion of renewable energy access.