發(fā)布時(shí)間：2018-01-26 17:03

  本文關(guān)鍵詞： 配電網(wǎng) 分布式電源 電壓控制 模型預(yù)測控制 電壓靈敏度　出處：《電工技術(shù)學(xué)報(bào)》2016年S1期 　論文類型：期刊論文

【摘要】：針對配電網(wǎng)中分布式電源(DG)接入滲透率不斷提高帶來的電壓波動、電壓越限等電能質(zhì)量問題,首先從理論上較全面地推導(dǎo)分析分布式電源接入對配電網(wǎng)電壓的影響,包括對接入點(diǎn)電壓和對電壓分布的影響,并通過仿真對比分析了不同DG滲透率和不同DG功率因數(shù)下的電壓變化情況,指出了全局電壓控制的必要性。在此基礎(chǔ)上,綜合考慮配電網(wǎng)中分布式電源和儲能的有功、無功電壓調(diào)節(jié)能力,提出一種基于模型預(yù)測控制(MPC)的電壓優(yōu)化控制方案,通過計(jì)算各節(jié)點(diǎn)電壓靈敏度,建立各節(jié)點(diǎn)電壓預(yù)測模型,提前感知各節(jié)點(diǎn)電壓變化趨勢,以各節(jié)點(diǎn)預(yù)測電壓與額定電壓之間偏差最小為控制目標(biāo),實(shí)現(xiàn)了控制成本最低的協(xié)調(diào)電壓控制策略。通過IEEE33節(jié)點(diǎn)配電網(wǎng)系統(tǒng)仿真算例分析,結(jié)果表明:本文提出的方法能更大限度地消除配電網(wǎng)中分布式可再生能源隨機(jī)波動帶來的影響,具有較好的電壓控制靈活性和魯棒性。
[Abstract]:In order to solve the power quality problems such as voltage fluctuation and voltage overrun caused by the increasing access permeability of DG in distribution network. Firstly, the influence of distributed power access on distribution network voltage, including access point voltage and voltage distribution, is deduced and analyzed in theory. The voltage variation under different DG permeability and DG power factor is analyzed by simulation, and the necessity of global voltage control is pointed out. Considering the active and reactive power regulation ability of distributed generation and energy storage in distribution network, a voltage optimal control scheme based on model predictive control (MPC) is proposed, and the voltage sensitivity of each node is calculated. The voltage prediction model of each node is established and the change trend of each node voltage is sensed in advance. The minimum deviation between the node predictive voltage and the rated voltage is taken as the control target. The coordinated voltage control strategy with the lowest control cost is realized. The simulation example of distribution network system based on IEEE33 node is analyzed. The results show that the proposed method can eliminate the influence of random fluctuation of distributed renewable energy in distribution network, and has better flexibility and robustness of voltage control.
【作者單位】： 中國科學(xué)院電工研究所;
【基金】：國家自然科學(xué)基金(51377152、51607170) 中國科學(xué)院前沿科學(xué)重點(diǎn)研究項(xiàng)目(QYZDB-SSW-JSC024) 國家電網(wǎng)公司科技項(xiàng)目(52020116000P)資助
【分類號】：TM714.2
【正文快照】： 0引言含分布式電源(Distribute Generator,DG)接入的主動配電網(wǎng)是未來配電網(wǎng)發(fā)展的主要趨勢[1-3],分布式電源接入配電網(wǎng)可實(shí)現(xiàn)能量的就地平衡,避免遠(yuǎn)距離輸電的投資和損耗;但與此同時(shí),分布式電源的接入也改變了傳統(tǒng)配電網(wǎng)潮流單向輻射狀供電模式,由于分布式可再生能源輸出功率

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本文編號：1466136