| 引用本文: | 谭颖婕,罗国敏,李猛,等.考虑电流保护定值不变的分布式电源最大可接入容量评估方法[J].电力系统保护与控制,2026,54(09):76-88. |
| TAN Yingjie,LUO Guomin,LI Meng,et al.Maximum hosting capacity evaluation method for distributed generations under fixed overcurrent protection settings[J].Power System Protection and Control,2026,54(09):76-88 |
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| 摘要: |
| 逆变型分布式电源(inverter-interfaced distributed generation, IIDG)的接入改变了配电网故障电流特性，导致
三段式电流保护在既有定值条件下易出现灵敏度下降和配合失效。为在定值不变前提下评估 IIDG 的最大可接入
容量，构建了包含保护、电压偏差、渗透率及单点容量约束的容量评估模型。基于电流保护整定原理，引入保护
范围作为统一表征保护灵敏度与选择性的指标，并建立固定定值下的保护约束模型。针对短路电流需迭代计算的
问题，提出短路电流显式建模方法，将其嵌入优化框架。进一步依据保护影响相似性对 IIDG 进行聚合，并通过
分段线性化将混合整数非线性模型转化为混合整数线性规划模型。MATLAB/Simulink仿真结果表明，当IIDG容
量不超过所求边界时，保护能够正确动作且节点电压保持在允许范围内，验证了所提方法的有效性。 |
| 关键词: 配电网 电流保护 可接入容量 保护边界 降维求解 |
| DOI：10.19783/j.cnki.pspc.251243 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(52577077) |
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| Maximum hosting capacity evaluation method for distributed generations under fixed overcurrent protection settings |
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TAN Yingjie1, LUO Guomin1, LI Meng1, HE Jinghan1, ZHANG Heng2
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1. School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China；2. State Grid Beijing Maintenance Company, Beijing 100100, China
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| Abstract: |
| The integration of inverter-interfaced distributed generation (IIDG) alters the fault current characteristics of distribution networks, which can lead to reduced sensitivity and coordination failure of three-stage overcurrent protection under fixed settings. To evaluate the maximum hosting capacity of IIDG without modifying protection settings, a capacity assessment model is formulated incorporating constraints on protection performance, voltage deviation, penetration level, and individual unit capacity. Based on the principles of overcurrent protection coordination, the concept of protection range is introduced as a unified index to characterize both sensitivity and selectivity, and a protection constraint model under fixed settings is derived. To address the need for iterative short-circuit current calculations, an explicit modeling approach for fault currents is proposed and embedded into the optimization framework. By aggregating IIDGs based on protection impact similarity, the original mixed-integer nonlinear problem is converted into a mixed-integer linear programming model through piecewise linearization. MATLAB/Simulink simulations verify that when the IIDG capacity remains within the derived boundary, protection operates correctly and node voltages stay within permissible limits, verifying the effectiveness of the proposed approach. |
| Key words: distribution network overcurrent protection hosting capacity protection boundary dimension reduction method |
