考虑设备全寿命周期的配电网节能改造方案决策

Strategy on Energy Saving Reconstruction of Distribution Networks Based on Life Cycle Cost

配电网节能改造工程资金往往有限,制定合理的成本效益模型和方案决策方法是关键。从全寿命周期成本(LCC)角度出发,首先分析确定了含有多种不同寿命设备的配电网节能改造研究寿命周期,然后建立了考虑配电变压器改造、配电线路改造、增设无功补偿装置三种配电网节能改造措施的全寿命周期成本效益模型,其中在设备运行损耗费用与检修维护费用方面提出了计及负荷季节特性的运行费用模型和配电变压器检修维护费用分段模型。在此基础上,考虑项目资金和改造标准约束,以单位LCC产生的节能效益最高为目标,建立配电网节能改造方案决策方法。采用实际配电网节能改造案例验证了以上模型和方法的有效性。

Because the actual distribution network reconstruction project funds are often limited,the cost-benefit model and the decision-making method are crucial for distribution network energy saving reconstruction project. From the perspective of life cycle cost（ LCC）,firstly the research life cycle is determined for the energy saving reconstruction of distribution networks with multi-devices.Then,a newlife cycle cost-benefit model for energy-saving reconstruction of distribution network is developed,in which the modification schemes include distribution transformers replacement,lines replacement and reactive power compensation. In the operation loss cost and maintenance cost area,the operation cost model considering the influence of load season characteristics and the maintenance cost segmental model of transformers are proposed. Finally,aiming at the highest energy saving profit per LCC,a decision-making method is developed while considering financial and technical constraints as well. The model and method are applied to a real distribution network reconstruction,and the results prove that the model and method are effective.