本文選題：微電網(wǎng) + 電壓控制　； 參考：《電力自動(dòng)化設(shè)備》2017年04期

【摘要】：由于微電網(wǎng)電氣聯(lián)系緊密,且低壓線路阻抗比較大,其電壓水平不僅與無功功率相關(guān),也與有功功率密切相關(guān)。為此,建立了節(jié)點(diǎn)電壓與有功功率的關(guān)系模型,推導(dǎo)了有功-電壓靈敏度矩陣。針對(duì)微電網(wǎng)中電源逆變器一次電壓控制的調(diào)節(jié)能力有限等問題,提出了一種微電網(wǎng)二次電壓模糊控制策略。通過節(jié)點(diǎn)有功-電壓靈敏度建模,考慮了網(wǎng)絡(luò)拓?fù)涞挠绊?基于模糊控制理論,建立了通過調(diào)節(jié)有功功率進(jìn)行微電網(wǎng)實(shí)時(shí)電壓控制模型,豐富了微電網(wǎng)電壓控制的手段。算例分析表明:當(dāng)微電網(wǎng)中線路電阻與電抗之比較大時(shí),各節(jié)點(diǎn)電壓受有功功率變化的影響較大。應(yīng)對(duì)實(shí)時(shí)功率波動(dòng)引起的電壓偏離,除傳統(tǒng)的無功控制策略之外,通過調(diào)節(jié)分布式電源的有功功率,也可以有效地將各節(jié)點(diǎn)電壓控制在允許范圍內(nèi),從而提高微電網(wǎng)的電壓質(zhì)量。
[Abstract]:The voltage level of microgrid is not only related to reactive power but also to active power because of its close electrical connection and large impedance of low voltage line. For this reason, the relationship between node voltage and active power is established, and the sensitivity matrix of active power and voltage is derived. A fuzzy control strategy for secondary voltage of microgrid is proposed to solve the problem of limited regulation ability of primary voltage control of power inverter in microgrid. Based on the fuzzy control theory, the real-time voltage control model of microgrid by adjusting active power is established, which enriches the method of voltage control in microgrid. The example analysis shows that when the line resistance and reactance in the microgrid are large, the voltage of each node is greatly affected by the change of active power. To deal with the voltage deviation caused by the real-time power fluctuation, in addition to the traditional reactive power control strategy, the voltage of each node can be effectively controlled within the allowable range by adjusting the active power of the distributed power supply. Thus, the voltage quality of microgrid is improved.
【作者單位】： 西安交通大學(xué)電氣工程學(xué)院陜西省智能電網(wǎng)重點(diǎn)實(shí)驗(yàn)室;北京北變微電網(wǎng)技術(shù)有限公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51577146) 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2016JM5072)~~
【分類號(hào)】：TM727

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