本文選題：STATCOM　切入點(diǎn)：LCL濾波器　出處：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著生產(chǎn)規(guī)模的擴(kuò)大和電力電子器件的廣泛應(yīng)用,煤礦井下出現(xiàn)嚴(yán)重的電能質(zhì)量問(wèn)題,如:無(wú)功功率消耗大、諧波含量高、三相不平衡等。STATCOM作為動(dòng)態(tài)無(wú)功補(bǔ)償與諧波抑制裝置,具有動(dòng)態(tài)響應(yīng)速度快、補(bǔ)償精度高和占地面積小等優(yōu)點(diǎn),可以有效的治理煤礦的電能質(zhì)量問(wèn)題。首先,本文研究了660V STATCOM直流側(cè)電容和LCL濾波器的選型。LCL濾波器的參數(shù)整定是目前研究的重點(diǎn)和難點(diǎn),本文提出一種基于阻尼損耗最小的LCL濾波器的參數(shù)優(yōu)化方法,該方法具有阻尼損耗小、濾波效果好等優(yōu)點(diǎn)。針對(duì)直流側(cè)電容電壓中含有諧波的情況,提出一種以電容電壓中二次諧波幅值為約束條件的電容值優(yōu)化方法,該方法能保證直流側(cè)電容電壓的波動(dòng)在允許的范圍內(nèi)。然后,本文分析了基于反饋解耦的間接電流控制和基于固定開關(guān)頻率的直接電流控制的工作原理,在此基礎(chǔ)上研究一種基于電壓空間矢量的雙滯環(huán)跟蹤控制方法,通過(guò)MATLAB/Simulink仿真,驗(yàn)證了無(wú)論三相電壓對(duì)稱與否,該種控制方法均具有開關(guān)頻率小,開關(guān)損耗少、動(dòng)態(tài)響應(yīng)速度快和無(wú)靜差補(bǔ)償?shù)葍?yōu)點(diǎn)。功率模塊采用注入負(fù)序電流的穩(wěn)壓控制方法,本文研究了其控制環(huán)中PI控制器的參數(shù)整定方法,提出一種基于系統(tǒng)穩(wěn)定性的PI參數(shù)優(yōu)化方法,在MATLAB/Simulink中進(jìn)行仿真,結(jié)果表明,本文設(shè)計(jì)的PI參數(shù)能夠減小直流側(cè)電容電壓紋波的幅值,使輸出電流緊緊跟隨指令電流的變化。最后,針對(duì)煤礦的工作環(huán)境,本文研究了井下STATCOM的防爆措施和散熱措施,并設(shè)計(jì)出一套完整的STATCOM裝置。將其用于皖北煤礦井下660V采區(qū)變電所,利用電能質(zhì)量分析儀HIOKI3196對(duì)井下絞車變壓器出線側(cè)的電能參數(shù)進(jìn)行測(cè)量,結(jié)果表明,經(jīng)STATCOM補(bǔ)償后,煤礦井下諧波含量降低,功率因數(shù)接近1,能夠滿足無(wú)功補(bǔ)償和諧波抑制的要求。
[Abstract]:With the expansion of production scale and the wide application of power electronic devices, serious power quality problems appear in coal mine, such as: large reactive power consumption, high harmonic content, three-phase imbalance, etc. Statcom is used as dynamic reactive power compensation and harmonic suppression device. With the advantages of fast dynamic response, high compensation precision and small area, it can effectively solve the power quality problems in coal mines. In this paper, the parameter tuning of 660V STATCOM DC side capacitance and LCL filter selection. LCL filter is the focus and difficulty of current research. In this paper, a parameter optimization method of LCL filter based on minimum damping loss is proposed. This method has the advantages of low damping loss and good filtering effect. In order to solve the problem of harmonics in the capacitor voltage at the DC side, a capacitor optimization method with the second harmonic amplitude in the capacitor voltage as the constraint condition is proposed. This method can ensure that the voltage fluctuation of DC side capacitance is within the allowable range. Then, the principle of indirect current control based on feedback decoupling and direct current control based on fixed switching frequency is analyzed. On this basis, a double hysteresis tracking control method based on voltage space vector is studied. The simulation results of MATLAB/Simulink show that this control method has small switching frequency and less switching loss, no matter whether the three-phase voltage is symmetrical or not. The power module adopts the steady voltage control method of injecting negative sequence current. The parameter tuning method of Pi controller in its control loop is studied in this paper. A Pi parameter optimization method based on system stability is proposed and simulated in MATLAB/Simulink. The results show that the Pi parameter designed in this paper can reduce the amplitude of capacitor voltage ripple at DC side. The output current is closely followed by the change of instruction current. Finally, aiming at the working environment of coal mine, the explosion-proof measures and heat dissipation measures of underground STATCOM are studied in this paper. A complete set of STATCOM device is designed, which is used in 660V substation of underground mine in north Anhui coal mine. The electric energy parameters of underground winch transformer are measured by power quality analyzer (HIOKI3196). The results show that, after the compensation of STATCOM, the power parameters of underground winch transformer are measured. The harmonic content in coal mine is reduced and the power factor is close to 1, which can meet the demand of reactive power compensation and harmonic suppression.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM761

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