计及多约束的中低压馈线分布式光伏承载力评估简化模型

The Simplified Evaluation Model of Hosting Capacity for Distributed Photovoltaic on Medium and Low Voltage Feeders Considering Multiple Constraints

中文关键词:中低压馈线  分布式光伏  承载力评估  简化评估模型

keywords:medium-and-low voltage feeders  distributed photovoltaic  hosting capacity evaluation  simplified evaluation model

中文摘要:为解决分布式光伏接入中低压配电网引发的安全约束问题，建立了负荷与分布式光伏沿主干线路 5 种典型分布方式下的光伏承载力评估简化模型，该模型全面覆盖设备反向重过载、电压损耗、电压波动、谐波电压、短路电流及继电保护6种大核心约束。针对 10 kV 线路不同长度、线型及负荷大小的典型场景，基于电压损耗、线路载流、电压波动和谐波四大关键指标，对分布式光伏承载力展开计算分析。分析结果表明，所提计及多约束的模型具有数据需求少、计算量低的优势，可高效应用于大规模中低压配电网的光伏承载力快速评估。

Abstract:To address safety constraint challenges posed by integrating distributed photovoltaics （PV） into medium and low-voltage distribution networks， this paper develops a streamlined model for evaluating distributed PV hosting capacity under five typical distribution patterns of loads and distributed PV along the main line， and comprehensively encompasses six core constraints: equipment heavy reverse overload， voltage drop， voltage fluctuation， harmonic voltage， short-circuit current， and relay protection. For representative 10 kV line scenarios featuring varying lengths， conductor types and load magnitudes， the distributed PV hosting capacity is comprehensively calculated and analyzed based on four critical indicators: voltage drop， line current-carrying capacity， voltage fluctuation and harmonics. Results demonstrate the proposed multi-constraint model offers significant advantages， including minimal data requirements and reduced computational complexity， enabling its efficient application for rapid， large-scale PV hosting capacity assessment in medium and low-voltage distribution networks.