分布式发电规划的负荷模型研究

分布式发电大规模接入配电网，是当前电力系统面临的挑战之一．虽然学术界广泛认同分布式发电具有降低系统网损的的潜力，但是如果计算过程中负荷建模不当，很可能会影响分布式发电规划的准确性．研究配电网负荷模型对分布式发电规划的影响，采用综合电力负荷模型将配电网负荷分为居民用电、工业用电和商业用电，对比分析了不同负荷模型对含分布式发电的配电网损的影响．对-38节点配电系统进行分析，计算不同分布式发电接入方案以及采用不同负荷模型时系统的网损．算例的仿真结果表明，负荷模型的选取对分布式发电的规划具有重要影响．

Reserch of load modelling for distributed generation planning

Increasing the penetration level of Distributed Generation （DG） into the distribution system is a new ehallenge for traditional electric power systems. Although it is generally recognised that DG has the potential of reducing energy losses in power systems, inappropriate modelling can lead to a misleading predictions for power loss reduction in DG planning. This paper presents an investigation into the impact of load models on the calculation of energy loss, and proposes detailed modelling of load in DG planning, where load is divided into three categories： residential, industrial and commercial. A comparative study of real and reactive power losses for various load models and load levels is carried out using the methodology proposed in this paper. A sample power system is adopted to analyse the system performance under various DG scenarios and at various load levels. Simulation results indicate that load models can significantly affect the load losses calculation in DG planning.