10kV配电网可靠性与成本效益分析的研究

10kV 配电网可靠性与成本效益分析的

研究

摘要

配电网可靠性研究的根本目的是为了向用户提供安全 可靠的

电力供应 而最终目的是为了获得最佳社会效益 电力部门的统计 资料表明 约80% 以上的用户停电是由于配电网故障造成的 配电

网是否可靠 对用户影响最大 因此对配电网可靠性进行评估改善 配电网供电的可靠性在理论上和实际上都具有重要的意义 本文在阅读国内外配电网可靠性分析的有关文献的基础上 总

结前人的研究成果 针对10kV 配电网结构复杂 负荷点密集 计算 量大的特点 利用了基于潮流约束和元件故障遍历的配电网可靠性

评估算法来实现了10kV 配电网的可靠性评估 本文采用VC 语

言编写程序 并通过实际算例验证了该算法是合理的 科学的 配电网可靠性成本与可靠性效益是一对矛盾体 本文给出了以 可靠性成本与可靠性效益相结合作为寻求配网最优的投资策略的目 标函数 采用了基于单亲遗传算法的10kV 配电网的可靠性成本效益 分析方法来计算配网的可靠性成本效益 分析不同情况下馈线上连

接元件设置与否对系统停电损失造成的影响 将连接元件的可靠性 效益与可靠性成本相结合 最终得到了连接元件该如何设置才使系

统的综合经济效果最佳的网络配置 本文还对10kV 配电网的投资策略进行了研究 在分析供电可靠

性指标的基础上考虑用户的停电损失 并将停电损失与投资费用相

结合 从而得到总拥有费用最小的投资方案的方法 根据 基于GIS 系统的10kV 配电小区规划的智能决策系统 的

项目要求 借助于GIS 系统的图形绘制 参数修改以及数据存储等功 能 实现配电系统可靠性的计算结果可视化功能 为GIS 系统在配电 系统可靠性管理和评估中的应用奠定了良好的基础 也为今后配电 系统可靠性的研究和发展提供了广阔的空间 关键词 配电网 地理信息系统 单亲遗传算法 可靠性评估 成本效益分析

THE RESEARCH OF RELIABILITY AND COST-BENEFIT ANALYSIS FOR DISTRIBUTION

NETWORK

ABSTRACT

The essential objective of the research on distribution-system-reliability is to provide safety, reliable electric power to customers, and the ultimate aim is to gain the maximum benefit for society. The statistics of electric power company show that more than 80% letting off customer is leaded by distribution network fault. So the reliability of distribution system is most important to customer, and the evaluation of the reliability and improving power supply of distribution network is significant theoretically and actually.

On the basis of reading domestic and foreign references about reliability analysis of power distribution network, this paper summarizes the academic achievement of predecessors. According to the features of 10kV distribution network such as complex structure, dense load, large-scale calculation, the reliability evaluation algorithm of 10kV distribution network based on components fault-traverse constrained by power flow is proposed. The program is composed by VC language, and is validated to be rational and scientific through case study.

In distribution systems, the reliability cost is conflict to the reliability

benefit. The objective function of the optimization investment strategy of the distribution systems is presented by combining the reliability cost with the reliability benefit. Also, a reliability evaluation and cost-benefit analysis algorithm based Partheno-Genetic Algorithm (PGA) is proposed for 10kV distribution system in this paper. The effects on the loss of interruption with/without the components of a feed line are analyzed. After combining the benefit and cost of the reliability of the components, the best distribution system plan to set the connecting components is carried, which has integrative economic benefit.

The investment strategy of the 10kV distribution system is also carried. The lowest TOC scheme is found by combining the losses with the investment. It considers the investment strategy both of the utility and of the customer.

According to the requirement of the project ——The intelligent system for 10kV distribution system planning based on the Geography Information System (GIS) and recurring to the map drawing, data revising and storing functions, the results are displayed in the GIS background images easily and lively. It lays a well foundation for the further application of GIS in distribution system reliability management and evaluation, and offers a broad foreground for the development of distribution system reliability.

Key Words: Distribution Network; Geography Information System GIS); Partheno-Genetic Algorithm (PGA); Reliability Evaluation; Cost-benefit Analysis.