光伏电站集电线路节能改造的经济性研究——以山东华电阳来65 MW光伏电站为例

Economic Research on Energy-Saving Transformation of Collection Lines in Photovoltaic Power Stations—A Case Study of Shandong Huadian Yanglai 65 MW Photovoltaic Power Station

摘要: 针对当前大中型光伏电站集电线路空载损耗突出、安全运行风险较高及精细化管理缺失等问题，本文以山东华电阳来65 MW光伏电站为研究对象，从项目背景、场站概况、技术方案、实施条件、经济效益、环境效益及安全效益等多个维度，系统开展集电线路节能柜设备应用的可行性分析。研究结果表明，该电站集电线路非发电时段占比近2/3，空载损耗显著，通过安装3套XLJN-35I型集电线路节能柜，可实现非发电时段回路自动切断，每年节约电量约50万kWh，静态税前投资回收期仅5.7年；同时能有效降低夜间谐振过电压风险，每年减少CO₂排放407吨。研究证实，集电线路节能柜设备在技术上可靠、经济上可行，且环境与安全效益突出，可为光伏电站提质增效与安全稳定运行提供有力支撑，对推动光伏电站精细化运维具有重要的参考价值。

Abstract: In response to the prominent no-load losses, high safety operation risks, and lack of refined management in the collection lines of large and medium-sized photovoltaic power plants, this article takes the Shandong Huadian Yanglai 65 MW photovoltaic power plant as the research object. From multiple dimensions such as project background, station overview, technical plan, implementation conditions, economic benefits, environmental benefits, and safety benefits, the feasibility analysis of the application of energy-saving cabinet equipment in the collection lines is systematically carried out. The research results show that the non-power generation period of the power station’s collection line accounts for nearly 2/3, and the no-load loss is significant. By installing three sets of XLJN-35I energy-saving cabinets for collection lines, the circuit can be automatically cut off during non-power generation periods, saving about 500000 kWh of electricity per year. The static pre tax investment payback period is only 5.7 years; At the same time, it can effectively reduce the risk of resonance overvoltage at night and reduce CO₂ emissions by 407 tons annually. Research has confirmed that energy-saving cabinet equipment for power collection lines is technically reliable, economically feasible, and has outstanding environmental and safety benefits. It can provide strong support for improving the quality, efficiency, and safe and stable operation of photovoltaic power plants, and has important reference value for promoting refined operation and maintenance of photovoltaic power plants.