中低压混合配网一体化状态估计及其应用

发布时间：2018-01-19 06:31

本文关键词： 高级量测体系(AMI) OpenDSS 三相状态估计量测时延窃电分析　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：高级配电运行(Advanced Distribution Operation,ADO)是智能电网的重要组成部分。ADO要求电网具备实时的监视分析、网络重构等功能,这些功能的实现都需要利用状态估计技术来提供基础数据支持。随着电力系统网络的日益复杂,电力市场多元化的深入发展,人们对配电网的状态估计精度和处理实时量测信息的能力有了更高的要求。促使针对于配电网的状态估计理论研究得到进一步的开展,为更准确的估计网络运行状态提供了可能。高级量测体系(Advanced Metering Infrastructure,AMI)是智能电网的重要基础设施。通过AMI的核心设备智能电表,电力公司可以获得配电网终端用户历史的或准实时的多种量测信息。这些信息丰富了配电网的量测类型,能够有效解决长期以来配电网因量测配置不足、通信通道不完善而造成局部网络不可观测的问题。将AMI所采集的数据合理的应用到配电网状态估计中能够更准确、全面的估计出系统当前运行状态,从而为其它高级应用提供更可靠的数据支持。本文首先针对配电网中三相线路不对称,负荷不平衡的特点,详细描述了电网中各类元件的三相模型,以节点电压实部和虚部为状态变量分别对节点负荷功率量测、节点电压幅值量测、支路电流幅值量测和支路功率量测的雅克比矩阵进行了推导,利用OpenDSS与VBA的接口功能实现了配电网三相状态估计。利用AMI核心设备智能电表采集的多种量测信息,在中压配电网状态估计中,提出了以基于AMI数据生成伪量测的方法来代替通过负荷预测得到的传统伪量测,提高了状态估计精度,同时实现了以用户为最小节点的低压配电网的状态估计,并通过算例表明估计结果具有较高的精度。最后,本文综合利用SACDA量测和AMI智能电表量测等多种量测信息,提出了中低压混合配网一体化的状态估计方法,该方法可以避免中压馈线末端负荷量测匮乏时而采用误差较大的伪量测和对低压配网进行估计时将馈线末端变压器节点近似为“假设电源”的问题。基于中低压混合配电网的状态估计,分别对量测量时延处理和窃电分析两方面的应用提出了相应的方法并通过算例证明有效性。
[Abstract]:Advanced distribution operation (Advanced Distribution Operation, ADO) is an important part of smart grid.ADO grid have the real-time monitoring function analysis, network reconfiguration and so on, are required to achieve these functions by using state estimation techniques to provide data support. With the development of power system network is increasingly complex, in-depth development of power market diversification, people state the distribution network estimation accuracy and real-time processing ability measurement information have higher requirements. The needle for distribution network state estimation theory to get further development, provides the possibility to estimate the running state of the network more accurately. Advanced measuring system (Advanced Metering Infrastructure, AMI) is an important infrastructure of intelligence the grid. Through the core equipment of AMI's smart meters, electric power company can achieve a variety of distribution network terminal history or quasi real time The measurement information. These abundant information of distribution network measurement types, can effectively solve the long-standing distribution network measurement due to lack of allocation and communication channel imperfections caused by local network cannot be observed. The AMI collected data reasonably applied to the distribution network state estimation can be more accurate and comprehensive estimation the system currently running, so as to provide more reliable data support for other advanced applications. In this paper, the three-phase line distribution network asymmetry, unbalanced load characteristics, describes the various components of the grid three-phase model in detail, the real and imaginary node voltage as the state variable of node load power measurement. Node voltage amplitude measurement, the Jacobian matrix of branch current phasor and branch power measurement are deduced and realized distribution three-phase state estimation using the interface of OpenDSS and VBA Using a variety of measurement information. The amount of AMI core equipment of smart meter acquisition, in medium voltage distribution network state estimation, put forward to the method of generating pseudo measurement based on AMI data to replace the traditional load forecasting by pseudo amount measurement, improves the precision of state estimation, at the same time in order to realize the users of low-voltage distribution network state minimum node estimates, shows that the estimation results with high accuracy and through examples. Finally, this paper test and AMI smart meter measuring various measurement information by SACDA, put forward the estimation method in low voltage distribution network integration mixed state, the method can avoid the end of medium voltage feeder load measurements and the lack of the pseudo volume the error of measurement and estimation of the low voltage distribution network feeder terminal transformer node approximately "assume power". In the low voltage distribution network based on hybrid state estimation, respectively on the amount The application of the two aspects of the time delay processing and the electric stealing analysis is proposed and the validity of the method is proved by an example.

【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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