發(fā)布時間：2018-01-18 00:12

  本文關(guān)鍵詞：分布式電源協(xié)調(diào)控制與電能質(zhì)量評估系統(tǒng)設(shè)計　出處：《南京理工大學》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 電能質(zhì)量 分布式發(fā)電 綜合評估方法 有功平衡 協(xié)調(diào)控制

【摘要】：近些年,電力系統(tǒng)發(fā)電方式和用電設(shè)備的改變使電能質(zhì)量問題愈加突出,影響電能質(zhì)量的動態(tài)行為因素越加復雜,電能質(zhì)量綜合評估和控制難度也越來越大。分布式發(fā)電(Distributed Generation,DG)波動性與間歇性特點給傳統(tǒng)電能質(zhì)量評估和控制帶來了新的要求。加強電能質(zhì)量的綜合評估是預防與治理電能質(zhì)量問題的前提,維持系統(tǒng)有功平衡是保證電能質(zhì)量的關(guān)鍵。本文圍繞分布式電源電能質(zhì)量的評估與控制方法開展研究,主要針對電能質(zhì)量多指標綜合評估、分布式系統(tǒng)功率預測以及有功協(xié)調(diào)控制問題展開探討,建立電能質(zhì)量綜合評估與風光儲協(xié)調(diào)控制系統(tǒng)模型,主要工作包括:1)基于組合賦權(quán)法的分布式電源電能質(zhì)量綜合評估方法研究。采用層次分析法、模糊數(shù)學法、熵值法和變異系數(shù)法以及不同的組合方法建立8種電能質(zhì)量綜合評估模型,通過數(shù)據(jù)評估實驗,說明單一綜合評價方法的不足,驗證主、客觀結(jié)合的組合評價法對DG電能質(zhì)量綜合評估的適應性與準確性。2)基于移動平均法的風光功率平滑預測方法研究。對傳統(tǒng)方法的移動平均項數(shù)和樣本權(quán)重進行調(diào)整與修正,提出一種修正自適應帶寬加權(quán)移動平均法,解決傳統(tǒng)方法在功率驟變點的滯后疊加性和儲能限制問題。通過仿真實驗,驗證該方法的平滑效果與修正效果更能滿足實際預測的需求。3)風光儲協(xié)調(diào)控制策略研究。建立儲能交流側(cè)接入的風光儲聯(lián)合發(fā)電模型,設(shè)計一種基于有功功率平滑的儲能協(xié)調(diào)控制策略。通過仿真實驗,驗證該控制策略對發(fā)電系統(tǒng)有功輸出的平滑效果,以及在改善分布式系統(tǒng)電能質(zhì)量的作用。通過對比實驗,說明不同控制策略對配網(wǎng)環(huán)境和儲能條件的需求與影響。
[Abstract]:In recent years, the power quality problems become more and more serious due to the change of power generation mode and equipment, and the dynamic behavior factors that affect the power quality become more and more complex. It is more and more difficult to evaluate and control the power quality synthetically. Distributed Generation. The volatility and intermittency of DG bring new requirements to traditional power quality assessment and control. Strengthening the comprehensive evaluation of power quality is the premise to prevent and control power quality problems. Maintenance of active power balance is the key to ensure power quality. This paper focuses on the power quality assessment and control methods of distributed power supply, mainly aimed at the comprehensive evaluation of power quality. The power prediction and active power coordinated control of distributed system are discussed, and the model of integrated evaluation of power quality and coordinated control system of wind and wind storage is established. The main work includes: (1) Research on power quality comprehensive evaluation method of distributed power supply based on combinatorial weighting method, using analytic hierarchy process (AHP) and fuzzy mathematics method. Entropy method, coefficient of variation method and different combination methods are used to establish 8 kinds of comprehensive evaluation models of power quality. Through data evaluation experiments, the shortcomings of the single comprehensive evaluation method are proved and the main evaluation method is verified. Adaptability and accuracy of combined Evaluation method based on objective combination to Comprehensive Evaluation of DG Power quality. Based on moving average method, the prediction method of wind power smoothing is studied. The moving average terms and sample weights of traditional methods are adjusted and corrected. A modified adaptive bandwidth-weighted moving average method is proposed to solve the problem of lag superposition and energy storage limitation of traditional methods at power sudden change points. Verify that the smoothing effect and correction effect of this method can better meet the actual forecast demand. 3) study on coordinated control strategy of wind and wind storage. Establish the combined generation model of wind and storage with AC side of energy storage. An energy storage coordinated control strategy based on active power smoothing is designed. The simulation results show that the control strategy can smooth the active power output of power generation system. The effects of different control strategies on the distribution network environment and energy storage conditions are illustrated through comparative experiments.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM711

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