發(fā)布時(shí)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(píng)估系統(tǒng)設(shè)計(jì)　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電能質(zhì)量 分布式發(fā)電 綜合評(píng)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(dòng)態(tài)行為因素越加復(fù)雜,電能質(zhì)量綜合評(píng)估和控制難度也越來越大。分布式發(fā)電(Distributed Generation,DG)波動(dòng)性與間歇性特點(diǎn)給傳統(tǒng)電能質(zhì)量評(píng)估和控制帶來了新的要求。加強(qiáng)電能質(zhì)量的綜合評(píng)估是預(yù)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(píng)估與控制方法開展研究,主要針對(duì)電能質(zhì)量多指標(biāo)綜合評(píng)估、分布式系統(tǒng)功率預(yù)測(cè)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(píng)估與風(fēng)光儲(chǔ)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(píng)估方法研究。采用層次分析法、模糊數(shù)學(xué)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(píng)估模型,通過數(shù)據(jù)評(píng)估實(shí)驗(yàn),說明單一綜合評(píng)價(jià)方法的不足,驗(yàn)證主、客觀結(jié)合的組合評(píng)價(jià)法對(duì)DG電能質(zhì)量綜合評(píng)估的適應(yīng)性與準(zhǔn)確性。2)基于移動(dòng)平均法的風(fēng)光功率平滑預(yù)測(cè)方法研究。對(duì)傳統(tǒng)方法的移動(dòng)平均項(xiàng)數(shù)和樣本權(quán)重進(jìn)行調(diào)整與修正,提出一種修正自適應(yīng)帶寬加權(quán)移動(dòng)平均法,解決傳統(tǒng)方法在功率驟變點(diǎn)的滯后疊加性和儲(chǔ)能限制問題。通過仿真實(shí)驗(yàn),驗(yàn)證該方法的平滑效果與修正效果更能滿足實(shí)際預(yù)測(cè)的需求。3)風(fēng)光儲(chǔ)協(xié)調(diào)控制策略研究。建立儲(chǔ)能交流側(cè)接入的風(fēng)光儲(chǔ)聯(lián)合發(fā)電模型,設(shè)計(jì)一種基于有功功率平滑的儲(chǔ)能協(xié)調(diào)控制策略。通過仿真實(shí)驗(yàn),驗(yàn)證該控制策略對(duì)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(duì)比實(shí)驗(yàn),說明不同控制策略對(duì)配網(wǎng)環(huán)境和儲(chǔ)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(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM711

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