本文選題：煤層氣抽采機(jī) + 直流微網(wǎng)　； 參考：《電工技術(shù)學(xué)報(bào)》2017年14期

【摘要】：針對(duì)目前煤層氣抽采現(xiàn)場(chǎng)用電不合理現(xiàn)狀,構(gòu)建一種新型煤層氣抽采直流微網(wǎng)供電系統(tǒng),并對(duì)該直流微網(wǎng)系統(tǒng)穩(wěn)定性及控制策略進(jìn)行研究。煤層氣抽采直流微網(wǎng)供電系統(tǒng)分三層結(jié)構(gòu):第一層由光伏和蓄電池組成能量供給層;第二層由雙向Buck/Boost變換器構(gòu)成能量傳輸和分配層;第三層由煤層氣抽采機(jī)構(gòu)成負(fù)荷層�；诖思軜�(gòu)推導(dǎo)了第一、二層輸出阻抗Zo(s),并建立第三層煤層氣抽采機(jī)電動(dòng)機(jī)輸入阻抗Zin(s)與受控源K??m串聯(lián)的小信號(hào)模型,在此基礎(chǔ)上得到系統(tǒng)全局小信號(hào)模型�？紤]到呈現(xiàn)負(fù)阻抗特性的煤層氣抽采機(jī)電動(dòng)機(jī)周期性動(dòng)態(tài)交變負(fù)荷引起的系統(tǒng)不穩(wěn)定,在能量傳輸和分配層分析并討論了一種基于虛擬阻抗的直流微網(wǎng)穩(wěn)定性控制策略,以及利用下垂控制實(shí)現(xiàn)負(fù)荷功率動(dòng)態(tài)平衡分配的方法。進(jìn)一步利用阻抗匹配原則求解多項(xiàng)式1/(1+Zo(s)/Zin(s))主導(dǎo)極點(diǎn),比較采取該穩(wěn)定性控制策略前后的主導(dǎo)極點(diǎn)位置并分析直流微網(wǎng)系統(tǒng)穩(wěn)定性。最后基于Matlab/Simulink搭建由光伏陣列、儲(chǔ)能單元和煤層氣抽采機(jī)組成的煤層氣抽采直流微網(wǎng)系統(tǒng)模型,系統(tǒng)仿真證明了穩(wěn)定性控制策略的有效性。
[Abstract]:A new type of DC microgrid power supply system for coal-bed methane extraction and mining is constructed, and the stability and control strategy of the DC micro-grid system are studied.The DC microgrid power supply system of coal-bed methane extraction is divided into three layers: the first layer is composed of photovoltaic and battery energy supply layer, the second layer is composed of bi-directional Buck/Boost converter, and the third layer is composed of coal-bed methane extraction mechanism to form load layer.Based on this framework, the first and second layer output impedance Zosn is derived, and the small signal model of the third layer coal-bed methane pumping machine motor input impedance Zinsm in series with the controlled source KPM is established. On this basis, the global small signal model of the system is obtained.Considering the instability caused by the periodic dynamic alternating load of the coal-bed methane pumping machine motor with negative impedance, a kind of DC microgrid stability control strategy based on virtual impedance is analyzed and discussed in the energy transmission and distribution layer.And the method to realize load power dynamic balance distribution by droop control.Furthermore, by using the impedance matching principle, the dominant poles of polynomial 1 / 1 Zosm / / Zinnsn are solved, the dominant poles before and after the stability control strategy are compared and the stability of DC microgrid systems is analyzed.Finally, based on Matlab/Simulink, a DC microgrid model of coal-bed methane extraction is built, which is composed of photovoltaic array, energy storage unit and coal-bed methane extraction machine. The system simulation proves the effectiveness of the stability control strategy.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)機(jī)電與信息工程學(xué)院;山西藍(lán)焰煤層氣集團(tuán)有限責(zé)任公司;
【基金】：國(guó)家自然科學(xué)基金(51577187) 國(guó)家科技重大專項(xiàng)(2011ZX05063)資助項(xiàng)目
【分類號(hào)】：TD712.6

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