计及多维不确定性的配电信息物理系统规划

发布时间：2018-06-17 23:12

本文选题：配电信息物理系统 + 电压控制　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：高渗透率分布式电源(Distributed Generation,DG)接入对电网的运行、保护及可靠性等方面造成了广泛影响,在一定程度上恶化了电网的电能质量和运行经济性。因此,电网采取一系列主动控制手段以避免电网运行状态劣化并进一步提升电网性能。而这些控制手段必定会加深电力系统对通信、信息与电子技术的依赖程度,这种依赖体现在信息系统的配置和性能严重影响了物理系统的运行和性能。由此可知,电力系统研究与信息系统研究在理论和方法上无法割裂,实现智能电网的关键之一就在于紧密而有机地将前沿的计算、通信、传感技术与电力系统融合起来。而信息物理系统(Cyber-Physical Systems,CPS)的目标正是将物理系统和信息系统融合为新型工业系统,其目的是深度加深物理与信息系统的交互与融合,从而提高整体系统的运行性能,该融合系统的多维不确定性、深度耦合性使其规划问题更为复杂。因此,本文基于配电信息物理系统(Cyber-Physical Distribution System,CPDS)在规划中的耦合特性分析,提出计及不确定性影响的CPDS规划新方法,建立计及电压控制功能及通信系统随机故障的CPDS规划模型。本文主要工作如下:首先,介绍CPDS的基本概念。提出了CPDS的典型多层结构与特征,并介绍各层结构的物理组成与功能特点;基于CPDS的多层结构深入分析该双层融合系统的渗透作用,进行了CPDS在规划中的耦合特性分析。然后,提出CPDS规划框架。针对运行控制、规划目标、约束条件等项目对比分析了CPDS规划和传统配电网规划的差异性;基于CPDS耦合特性分析,提出了考虑信息系统随机失效和控制失效的CPDS规划框架、规划流程和数学模型。其次,提出计及电压控制的CPDS规划的实用化案例。针对大量DG并网后带来的电压问题提出CPDS调压策略;在此基础上,建立考虑电压控制的CPDS规划模型,提出以配电公司配电成本最小且可再生能源能量渗透率最大为目标函数,考虑潮流方程约束、电压约束、和不确定性电能质量的概率约束等约束条件;通过优化方案形成和方案概率校核相结合的融合过程对该CPDS规划模型进行求解。最后,进行算例仿真分析。以分布式光伏并网且具备电压控制功能的改进IEEE-33节点配电系统为例进行仿真验证,结果验证了所提模型和算法的有效性和实用性,并探讨了控制参数、光伏渗透率对配置方案和信息系统随机故障对电压合格概率指标的影响,为配电信息物理系统的规划和改进措施提出了建议。
[Abstract]:High permeability distributed Generation (DG) access has a wide impact on the operation, protection and reliability of the power network, and to a certain extent has deteriorated the power quality and operation economy of the power network. Therefore, a series of active control measures are adopted to avoid the deterioration of power grid operation and further improve the performance of power grid. These control measures will definitely deepen the power system's dependence on communication, information and electronic technology, which is reflected in the configuration and performance of the information system, which seriously affects the operation and performance of the physical system. It can be seen that power system research and information system research can not be separated in theory and method. One of the keys to realize smart grid lies in the close and organic integration of advanced computing, communication, sensing technology and power system. The goal of Cyber-Physical Systems (CPS) is to integrate physical systems and information systems into a new industrial system, with the aim of deepening the interaction and integration of physics and information systems in order to improve the performance of the whole system. The multi-dimensional uncertainty and deep coupling of the fusion system make the planning problem more complicated. Therefore, based on the analysis of coupling characteristics of distribution information physical system (CPDS) in planning, a new CPDS planning method considering the influence of uncertainty is proposed, and a CPDS programming model considering voltage control function and random faults of communication system is established. The main work of this paper is as follows: firstly, the basic concept of CPDS is introduced. The typical multi-layer structure and characteristics of CPDS are put forward, and the physical composition and functional characteristics of each layer structure are introduced, and the penetration function of the two-layer fusion system is analyzed deeply based on the multi-layer structure of CPDS, and the coupling characteristics of CPDS in the planning are analyzed. Then, the CPDS planning framework is proposed. The differences between CPDS planning and traditional distribution network planning are compared and analyzed in terms of operation control, planning objectives and constraints, and a CPDS planning framework considering random failure and control failure of information systems is proposed based on the analysis of CPDS coupling characteristics. Planning process and mathematical models. Secondly, a practical case of CPDS programming considering voltage control is presented. A CPDS voltage regulation strategy is proposed to solve the voltage problems caused by DG, and a CPDS programming model considering voltage control is established. The objective function is the minimum distribution cost and the maximum energy permeability of renewable energy in distribution companies. Considering the constraints of power flow equation, voltage constraints, and probabilistic constraints of uncertain power quality, the CPDS programming model is solved through the fusion process of optimization scheme formation and scheme probability checking. At last, an example is given. Taking the improved IEEE-33 node distribution system with voltage control function as an example, the simulation results show that the proposed model and algorithm are effective and practical, and the control parameters are discussed. The influence of photovoltaic permeability on the configuration scheme and random fault of information system on the probability index of voltage eligibility is proposed, which provides suggestions for the planning and improvement of distribution information physical system.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM715

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