含分布式电源的配电网状态估计研究

发布时间：2018-01-12 15:32

本文关键词：含分布式电源的配电网状态估计研究　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着分布式发电(Distributed Generation，DG)技术的快速发展，能源危机和环境问题的迫切需求，驱动了越来越多的DG接入配电网中。DG的接入，使配电网由单电源辐射状系统向多电源弱环网系统转变，馈线上可能出现反向潮流和电压越限问题，加之负荷的波动变化与DG出力的随机波动，都对配电网运行带来了严峻的挑战。配电网状态估计(Distribution System State Estimation，DSSE)作为配电管理系统(DMS)核心部分，可以为配电网高级管理软件，如电压调节控制、DG功率出力控制和负荷分配，和配电网的安全稳定运行提供高可靠性的数据。由于配电网先天发展不足，配电网状态估计仍面临着诸多挑战：缺乏有效的实时量测、庞大的不对称配电网网络结构的详细建模以及能够适应含DG的三相不平衡状态估计算法。为此，本文从上述三个方面对含分布式电源的配电网状态估计进行研究。首先，本文针对配电网三相不平衡的特点，利用OpenDSS平台建立了更加精确的配电网三相模型，并根据DG的不同量测配置情况提出了DG的有量测和无量测状态估计模型；然后在建立的配电网三相模型的基础上，本文提出了考虑VR特性的含DG的配电网三相潮流匹配状态估计算法；在该算法中，，为了解决匹配过程中功率不平衡量分配系数的优化问题，本文提出了基于GMM模型的负荷伪量测权重优化算法。最后，基于OpenDSS/MATLAB的跨平台编程实现所提出的模型和算法，并通过具体算例分别验证了本文所提出的模型和方法的有效性和合理性。
[Abstract]:Along with the development of distributed generation (Distributed Generation, DG) the rapid development of technology, the urgent needs of the energy crisis and environmental problems, driving the access DG access to distribution network more and more.DG in the distribution network with a single power radial system to multi power weak ring network system transformation, feeder may reverse power flow and voltage appears more the problem with stochastic volatility fluctuations and DG output load, the distribution network operation has brought severe challenges. The distribution network state estimation (Distribution System State Estimation, DSSE) as the distribution management system (DMS) is the core part of senior management software for distribution network, such as voltage regulator control, DG power output control and load distribution, provide high reliability and data distribution network safe and stable operation. Because the distribution network lacks the development, distribution state estimation is still facing many challenges: the lack of Effective real-time measurement, large asymmetric distribution network structure detailed modeling, and three-phase unbalanced state estimation algorithm that can adapt to DG. Therefore, from the above three aspects, the state estimation of distribution network containing distributed generation is studied in this paper.
First of all, according to the characteristics of three-phase unbalance in distribution network, established the three-phase distribution network model is more accurate by using the OpenDSS platform, and according to the different measurements for DG configuration of DG is put forward the measurement and measurement state estimation model; then based on the three-phase distribution network model established on this paper considering the characteristics of VR distribution network with DG three-phase power flow, state estimation algorithm; in this algorithm, the matching process in order to solve the unbalanced power optimization allocation coefficient, this paper proposes a weight optimization algorithm for measuring load pseudo measurement based on the GMM model. Finally, cross platform OpenDSS/MATLAB programming model and algorithm based on the proposed, and through specific examples respectively to verify the model and method proposed in this paper is effective and reasonable.

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM744

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