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首頁> 外文學位 >Trajectory Sensitivity Based Power System Dynamic Security Assessment.
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Trajectory Sensitivity Based Power System Dynamic Security Assessment.

機譯：基于軌跡靈敏度的電力系統(tǒng)動態(tài)安全評估。

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摘要

Contemporary methods for dynamic security assessment (DSA) mainly rely on time domain simulations to explore the influence of large disturbances in a power system. These methods are computationally intensive especially when the system operating point changes continually. The trajectory sensitivity method, when implemented and utilized as a complement to the existing DSA time domain simulation routine, can provide valuable insights into the system variation in response to system parameter changes.;The implementation of the trajectory sensitivity analysis is based on an open source power system analysis toolbox called PSAT. Eight categories of sensitivity elements have been implemented and tested. The accuracy assessment of the implementation demonstrates the validity of both the theory and the implementation.;The computational burden introduced by the additional sensitivity equations is relieved by two innovative methods: one is by employing a cluster to perform the sensitivity calculations in parallel; the other one is by developing a modified very dishonest Newton method in conjunction with the latest sparse matrix processing technology.;The relation between the linear approximation accuracy and the perturbation size is also studied numerically. It is found that there is a fixed connection between the linear approximation accuracy and the perturbation size. Therefore this finding can serve as a general application guide to evaluate the accuracy of the linear approximation.;The applicability of the trajectory sensitivity approach to a large realistic network has been demonstrated in detail. This research work applies the trajectory sensitivity analysis method to the Western Electricity Coordinating Council (WECC) system. Several typical power system dynamic security problems, including the transient angle stability problem, the voltage stability problem considering load modeling uncertainty and the transient stability constrained interface real power flow limit calculation, have been addressed. Besides, a method based on the trajectory sensitivity approach and the model predictive control has been developed for determination of under frequency load shedding strategy for real time stability assessment. These applications have shown the great efficacy and accuracy of the trajectory sensitivity method in handling these traditional power system stability problems.
機譯：動態(tài)安全評估（DSA）的現(xiàn)代方法主要依靠時域仿真來探索電力系統(tǒng)中大干擾的影響。這些方法的計算量很大，尤其是在系統(tǒng)工作點連續(xù)變化時。軌跡靈敏度方法在實施和補充現(xiàn)有DSA時域仿真例程后可以為響應系統(tǒng)參數(shù)變化的系統(tǒng)變化提供有價值的見解。軌跡靈敏度分析的實現(xiàn)基于開源電力系統(tǒng)分析工具箱稱為PSAT。八類敏感性元素已被實施和測試。該實施方案的準確性評估證明了該理論和實施方案的正確性。通過兩種創(chuàng)新的方法減輕了附加靈敏度方程所帶來的計算負擔：一種是通過使用聚類并行執(zhí)行靈敏度計算。另一種是通過結(jié)合最新的稀疏矩陣處理技術開發(fā)改進的非常不誠實的牛頓法。數(shù)值研究了線性逼近精度與攝動大小之間的關系。發(fā)現(xiàn)線性近似精度和擾動大小之間存在固定的聯(lián)系。因此，該發(fā)現(xiàn)可以作為評估線性逼近精度的通用應用指南。詳細說明了軌跡靈敏度方法在大型現(xiàn)實網(wǎng)絡中的適用性。這項研究工作將軌跡靈敏度分析方法應用于西方電力協(xié)調(diào)委員會（WECC）系統(tǒng)。解決了幾種典型的電力系統(tǒng)動態(tài)安全問題，包括瞬態(tài)角穩(wěn)定性問題，考慮負載建模不確定性的電壓穩(wěn)定性問題以及瞬態(tài)穩(wěn)定性受約束的界面實際潮流極限計算。此外，基于軌跡靈敏度方法和模型預測控制的方法已經(jīng)被開發(fā)出來，用于確定低頻減載策略，用于實時穩(wěn)定性評估。這些應用顯示了軌跡靈敏度方法在處理這些傳統(tǒng)電力系統(tǒng)穩(wěn)定性問題方面的巨大功效和準確性。

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  • 作者

    Hou, Guanji.;

  • 作者單位

    Arizona State University.;

  • 授予單位 Arizona State University.;
  • 學科 Engineering Electronics and Electrical.
  • 學位 Ph.D.
  • 年度 2012
  • 頁碼 162 p.
  • 總頁數(shù) 162
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類
  • 關鍵詞

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