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博碩士論文 etd-0630115-124834 詳細資訊
Title page for etd-0630115-124834
論文名稱
Title
以最小平方差為基礎之配電系統狀態估計方法分析比較
Comparative Study of WLS Based Distribution System State Estimation
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
123
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2015-07-17
繳交日期
Date of Submission
2015-07-30
關鍵字
Keywords
配電自動化、智慧電表、配電系統狀態估計
Distribution Network Automation, Distribution System State Estimation, Advanced Metering Infrastructure
統計
Statistics
本論文已被瀏覽 5762 次,被下載 398
The thesis/dissertation has been browsed 5762 times, has been downloaded 398 times.
中文摘要
在配電系統中,因為缺乏完整的即時系統模型,全域最佳化的先進分析應用還沒有被廣泛的採用。隨著智慧電網計劃的推廣,更多具雙向通信功能的智慧電子設備被安裝在配電網路,由多種自動化系統匯集來的精準即時系統資料量將隨著增加。在客戶端方面,會推動更多的先進讀表基礎建設(AMIs),配電系統運轉員(Distribution System Operator)可以利用先進測量儀器的資料來獲得更準確的饋線負載模型,進而掌握系統狀態。
有效地整合智慧電子裝置(IED)、智慧電表(AMI)以及饋線與變電站自動化系統的資料,配電系統狀態估計(DSSE)可提供一連串穩態系統狀態,使即時最佳化可行、適應性保護與控制、電壓控制、需量反應、以及其他許多智慧型電網應用變為可能。本論文回顧配電系統狀態估計,並以基於加權最小平方法(WLS)之配電系統狀態估計,比較下列三種不同型式的方法,以了解不同方法適用於智慧型配電電網運轉的要求,受配電網路特性的影響,及估計結果受不良資料的影響。
Abstract
Advanced analytical applications for global controls and optimization of distribution systems have not been widely adopted by utilities because of lacking real-time complete system models. With the deployment of smart grid initiatives, more Intelligent Electronic Devices (IED) with two-way communications are being employed, so the amount of quasi real-time data gathered at different rates by various automation systems is increasing. In the customer side, more Advanced Metering Infrastructures (AMIs) are expected to be installed. AMI data can be utilized by Distribution System Operator (DSO) to obtain a more accurate load model.
With effective integration of data from IED, AMI, as well as feeder and substation automation systems, a series of steady state snapshots distribution system state estimations (DSSE) will be a key feature to enable real-time optimization, adaptive protection and control, voltage control, demand response, and many other smart grid features. This thesis briefly reviews the state of the art of DSSE methods, as well as comparison study of WLS based DSSE, focusing on the requirements for smart distribution grid applications, the effects of distribution network characteristics, and bad data effects on estimator results.
目次 Table of Contents
Thesis Approval Form .................................................................................................................................. i
摘 要 ............................................................................................................................................................ iii
Abstract ....................................................................................................................................................... iv
Table of Contents .......................................................................................................................................... v
List of Figures............................................................................................................................................. vii
List of Tables ............................................................................................................................................... ix
Nomenclature ................................................................................................................................................ i
Chapter 1 Introduction .............................................................................................................................. 1
1.1 Research Background and Objectives ............................................................................................ 1
1.2 Literature Review ........................................................................................................................... 3
1.2.1 DSSE Methods ....................................................................................................................... 3
1.2.2 Bad Data Detection and Identification ................................................................................. 27
1.3 Research Contributions ................................................................................................................ 31
1.4 Thesis Structure ............................................................................................................................ 31
Chapter 2 State Estimation in Distribution Management System ....................................................... 32
2.1 Properties of Distribution System State Estimations ................................................................... 32
2.1.1 Distribution Line Model ...................................................................................................... 33
2.1.2 Measurement Data ............................................................................................................... 34
2.2 The Use of DSSE Results for DMS Functions............................................................................. 38
2.2.1 Real-time Distribution System Monitoring.......................................................................... 38
2.2.2 Service Restoration .............................................................................................................. 39
2.2.3 Voltage Control.................................................................................................................... 40
2.2.4 Outage Management ............................................................................................................ 41
Chapter 3 Node Voltage Based and Branch Current Based DSSE ..................................................... 42
3.1 Problem Formulation and Solution Method ................................................................................. 42
3.1.1 Node Voltage Based Methods ............................................................................................. 42
3.1.2 Branch Current Based Method............................................................................................. 50
3.2 Comparison of Jacobian and Gain Matrix Structures in WLS Based DSSE ................................ 54
Chapter 4 Test Results and Discussions ................................................................................................. 58
4.1 Test Systems ................................................................................................................................ 58
4.1.1 IEEE 37 Node Test System.................................................................................................. 58
4.1.2 TPC 39 Node Test System ................................................................................................... 58
4.1.3 IEEE 123 Node Test System................................................................................................ 58
4.2 Test Cases and Performance Indices ............................................................................................ 59
4.3 Test Results .................................................................................................................................. 60
4.3.1 AMI Based Pseudo Measurements in DSSE ....................................................................... 61
4.3.2 Effect of Voltage and Current Magnitude Measurements on DSSE Results ....................... 64
4.3.3 Effects of Distribution System Characteristics on DSSE Robustness ................................. 67
4.4 Discussions ................................................................................................................................... 86
Chapter 5 Conclusions and Future Works ............................................................................................ 89
5.1 Conclusions .................................................................................................................................. 89
5.2 Future Works ................................................................................................................................ 90
References .................................................................................................................................................... 91
Appendices ................................................................................................................................................... 97
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