本文選題：SVG + 電容器組　； 參考：《福州大學(xué)》2014年碩士論文

【摘要】：本文以變電站內(nèi)電能質(zhì)量為研究對象,通過變電站增設(shè)動態(tài)無功補償及諧波治理裝置SVG配合站內(nèi)電容器組對站內(nèi)電能質(zhì)量進行治理,同時比對SVG投運前后的變電站內(nèi)電能質(zhì)量的測量數(shù)據(jù),并根據(jù)測量結(jié)果及數(shù)據(jù)比對對電能質(zhì)量問題進行分析及研究。首先根據(jù)SVG裝置控制機理,以鏈式H橋大功率電壓逆變器為核心,通過調(diào)節(jié)其輸出電壓幅值與系統(tǒng)電壓幅值的關(guān)系來確定輸出功率的性質(zhì)與容量,當其幅值(和相位)大于系統(tǒng)側(cè)電壓幅值(和相位)時輸出容性無功,反之,輸出感性無功。SVG裝置采用先進的鏈式電路拓撲結(jié)構(gòu)和單極倍頻移相載波脈寬調(diào)制技術(shù)(CPS-SPWM),一個周波內(nèi)開關(guān)多次,通過多個鏈節(jié)的移相疊加,使輸出電壓接近正弦波。最終實現(xiàn)實現(xiàn)以下功能：以功率因數(shù)控制為目標,能提供連續(xù)的感性到容性的無功補償；提供恒電壓控制功能,抑制系統(tǒng)過電壓,改善系統(tǒng)電壓穩(wěn)定性；在負荷側(cè),提高功率因數(shù)、降低電壓波動和負荷諧波。通過SVG裝置投運后實測,以驗證投入SVG裝置后對電能質(zhì)量的改善效果。實測表明,SVG裝置的投運,提高了母線功率因數(shù)和降低電壓波動；降低母線諧波電流；功率因數(shù)提高到0.99-1。這一措施有效的改善了實驗變電站的電能質(zhì)量。
[Abstract]:In this paper, the power quality in the substation is treated by adding dynamic reactive power compensation and harmonic control device SVG to the capacitor bank in the substation. At the same time, the power quality measurement data of substation before and after SVG are compared, and the power quality problem is analyzed and studied according to the measurement results and data comparison. Firstly, according to the control mechanism of SVG, the property and capacity of output power are determined by adjusting the relationship between the output voltage amplitude and the voltage amplitude of the system, taking the chain H-bridge high-power voltage inverter as the core. When the amplitude (and phase) is larger than the amplitude (and phase) of the voltage at the system side, capacitive reactive power is output. The output inductive reactive power. SVG device adopts advanced chain circuit topology and monopole frequency-shifted phase shift carrier pulse width modulation technique. The output voltage is close to sine wave through the phase-shifting superposition of multiple links through a Zhou Bo internal switch. Finally realize the following functions: take power factor control as the goal, can provide continuous inductive to capacitive reactive power compensation; provide constant voltage control function, suppress system overvoltage, improve system voltage stability; at load side, Improve power factor and reduce voltage fluctuation and load harmonics. In order to verify the effect of power quality improvement after putting SVG into operation, the SVG device is tested. The test results show that the operation of SVG increases the bus power factor and reduces the voltage fluctuation, reduces the harmonic current of the bus, and increases the power factor to 0.99-1. This measure effectively improves the power quality of the experimental substation.
【學(xué)位授予單位】：福州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM761;TM53

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2 ;教育部電能質(zhì)量工程研究中心[J];安徽科技;2002年03期

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本文編號：1956824