智能電網(wǎng)技術(shù)專題三(編輯修改稿)
2025-06-20 06:23 本頁面
【文章內(nèi)容簡介】 15 16 17 176 +88j 高速數(shù)據(jù)獲取 觀測量更多，包括相角、用戶狀態(tài)等 增強的電網(wǎng)可觀性 46 先進數(shù)據(jù)采集技術(shù) ? 信號傳感技術(shù) 電磁互感器 電子式互感器 ? 模擬數(shù)字變換技術(shù) ∑Δ型模數(shù)轉(zhuǎn)換方式 ? 鎖相跟蹤技術(shù) 模擬鎖相 數(shù)字鎖相 ? 時標同步技術(shù) GPS同步對時（ 2套以上） ? 數(shù)據(jù)濾波處理技術(shù) 靜態(tài)濾波 動態(tài)濾波 ? 高速數(shù)據(jù)運算處理技術(shù) 傅立葉分析法 ? 高速數(shù)據(jù)網(wǎng)絡(luò)通信傳輸技術(shù) IEC系列協(xié)議 47 Online Stability Monitoring amp。 Analysis Wide Area Visualization Model Validation amp。 Adjustment Controlled Separation amp。 Restoration 0 0 . 2 0 . 4 0 . 6 0 . 8 1 1 . 2 1 . 4 1 . 6 1 . 8 200 . 20 . 40 . 60 . 81Ti m e ( s e c o n d s )Voltage (pu)H a s s a y a m p a 5 0 0 k V M e a s u r e dS im u la t e d H = 0 . 3S im u la t e d H = 0 . 0 3S im u la t e d H = 0 . 0 5S im u la t e d H = 0 . 1S im u la t e d H = 0 . 2S im u la t e d H = 0 . 5Improve situational awareness Increase transfer capabilities Prevent cascading failures amp。 reduce widearea blackouts Reduce system restoration time and outage durations Improve accuracy of models Research Development Application Demonstration 先進數(shù)據(jù)采集技術(shù) 48 利用 WAMS數(shù)據(jù)及 EMS數(shù)據(jù)實現(xiàn)全網(wǎng)可視化 ? Industry Issues – How to use PMUs to improve system operators situational awareness? – How to handle large volume of PMU data? ? EPRI Solutions: Developed wide area visualization tool using PMU and EMS data – Developed eventreplay function to assist postevent analysis – Developed realtime security monitoring function – Developed disturbance location determination function 49 基于量測的電壓穩(wěn)定性分析 ? Industry Issues – Need online voltage stability monitoring and analysis capabilities – Simulationbased voltage stability analysis approach has limitations. ? EPRI Solutions: Developed threelevel voltage stability monitoring and analysis framework – Developed Voltage Instability Load Shedding to calculate voltage stability margin at substation level – Developed Measurementbased Voltage Stability Monitoring and Control algorithm to calculate voltage stability margin at Voltage Control Area level – Developing visualization tool to help system operators monitor systemwide voltage stability condition 50 基于 PMU的解列控制方案 ? Industry Issues – Where to separate? – When to separate? – How to separate? ? EPRI Solutions: Developed PMUbased Controlled Separation Framework – Study cascading scenarios offline and determine potential separation interfaces – Use PMU to monitor oscillation and developed algorithm to quickly identify the dominate oscillation mode. – Developed PMUbased OutofStep Relay scheme to determine the separation timing 51 用于驗證系統(tǒng)模型的準確程度 ? Industry Issues – Having accurate models is important for system planning studies – Validation of models is challenging ? EPRI Solutions: – Developed measurementbased load modeling methods and tools that can use measured disturbance data to validate load models. – Developed methods and tools that can use measured disturbance data to validate generator dyanmic models 0 0 . 2 0 . 4 0 . 6 0 . 8 1 1 . 2 1 . 4 1 . 6 1 . 8 200 . 20 . 40 . 60 . 81Ti m e ( s e c o n d s )Voltage (pu)H a s s a y a m p a 5 0 0 k V M e a s u r e dS i m u l a t e d H = 0 . 3S i m u l a t e d H = 0 . 0 3S i m u l a t e d H = 0 . 0 5S i m u l a t e d H = 0 . 1S i m u l a t e d H = 0 . 2S i m u l a t e d H = 0 . 552 AMI ? 電網(wǎng)的智能化需要電力供應(yīng)機構(gòu)精確得知用戶的用電規(guī)律，從而對需求和供應(yīng)有一個更好的平衡。目前我國的電表只是達到了自動讀取，是單方面的交流，不是雙方的、互動的交流。由智能電表以及連接它們的通信系統(tǒng)組成的先進計量系統(tǒng)能夠?qū)崿F(xiàn)對諸如遠程監(jiān)測、分時電價和用戶側(cè)管理等的更快和準確的系統(tǒng)響應(yīng)。 ? AMI 是一個用來測量、收集、儲存、分析和運用用戶用電信息的完整的網(wǎng)絡(luò)處理系統(tǒng)，由安裝在用戶端的智能電表，位于電力公司內(nèi)的量測數(shù)據(jù)管理系統(tǒng)和連接它們的通信系統(tǒng)組成 53 AMI先進電表網(wǎng)絡(luò)基礎(chǔ)設(shè)施 ? AMI 是一種用于先進電表，能夠提供近乎實時的雙向通信設(shè)施，是智能電網(wǎng)的基礎(chǔ)信息平臺。 ? AMI方便電力公司實時優(yōu)化供電計劃和網(wǎng)絡(luò)，支持“五遙”運行中的電網(wǎng)的每一個設(shè)備（包括電表），成為電力公司與消費者的之間的增值
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