含新能源的配电网风险规划研究

发布时间：2018-03-29 23:41

本文选题：配电网　切入点：分布式新能源　出处：《浙江大学》2016年硕士论文

【摘要】：随着新能源发电技术的不断进步,新能源并网成为解决环境污染、能源紧缺的一种重要的手段。但是随着新能源并入配电网的规模不断增加,对配电网运行与规划的影响越来越大,因此需要配电网规划可以给出满足负荷增长的最优网络建设方案。现有的研究主要集中在网架建设投资经济性和可靠性两方面,对于新能源接入对配电网运行风险影响考虑不足,本文在配电网规划中重点对配网风险因素进行研究。为解决新能源电源大规模接入使配电网网架规划复杂度升高的问题,提出一种考虑风险因素的配电网规划模型。综合考虑系统切负荷风险、供电不足风险和电压失稳风险三个因素,以经济损失值表示风险严重度,结合网损、线路投资等传统因素以电网综合经济费用最小作为目标函数。求解中针对传统遗传算法局部寻优能力差,提出基于格雷码编码加强算法后期局部搜索能力的改进算法,并应用广播原理,对算法计算过程中产生的不可行解进行修复。光伏出力受天气状态制约,导致不同天气状态下配电网潮流分布不同、电压升高甚至越限,因此配电网规划结果在光伏发电容量变化下会发生改变。针对不同的天气状态将光伏发电曲线划分为三类,利用两状态天气模型,模拟不同天气状态下的馈线故障概率。提出考虑风险因素的配电网规划评价指标,从电压越限、失负荷期望和光伏发电收益比三个方面对不同光伏渗透下的配电网规划方案进行评估,其中光伏发电收益比从单位容量经济性角度比较方案。实际电网分析时,从电力公司取得的实际数据大量存放于CIM文件中,本文给出CIM文件智能管理与校验方法,减轻公共信息模型解析编码工作量。同时基于实际项目,重点介绍了安徽省某地区10kV和35kV含新能源的电网基于配电网风险规划理论的电网规划方案。
[Abstract]:With the continuous progress of the new energy power generation technology, new energy grid to solve environmental pollution, an important means of energy shortage. But with the development of new energy into the distribution network scale is increasing, impact on the operation and planning of distribution network is more and more big, so the need for distribution network planning is given to satisfy the load growth optimal network construction scheme. The existing research mainly focus on two aspects of grid construction investment economy and reliability, for new energy access and less consideration on the operation risk of distribution network, the distribution network planning to focus on distribution network risk factors. In order to solve the large-scale new energy power access to distribution network planning complexity increased problems. This paper presented a risk factor model of distribution network planning. Considering the system load shedding risk, the risk of insufficient power supply and voltage instability risk by three The value of economic losses, said the risk severity, with net loss, line investment and other traditional factors in the comprehensive economic power as the objective function. The minimum cost solution for traditional genetic algorithm local search ability, and puts forward the improved algorithm based on Gray code encoding algorithm later to strengthen local search ability, and the application of broadcasting principle, algorithm in the process of calculation have to fix the infeasible solutions. The PV output by the weather condition, weather conditions lead to different power flow distribution of different voltage even more limited, so the distribution network planning results will change in the photovoltaic power generation capacity changes. According to the different weather condition will be divided into three types of PV curve two, the state of the weather simulation model, fault probability in different weather conditions. The distribution network planning considering the evaluation indicators of risk factors, from the voltage limit, Loss of load expectation and photovoltaic power yields more than three aspects of different PV penetration under the distribution network planning evaluation, including photovoltaic power generation revenue ratio from the perspective of unit capacity economic scheme. The actual power grid analysis, actual data obtained from a large number of the company's power stored in the CIM file, this file CIM intelligent management with the calibration method, reduce the public information analysis model. At the same time encoding workload based on the practical project, introduces the 10kV and 35kV in Anhui province with the new energy grid planning theory of distribution network planning based on risk row scheme.

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM715

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