【摘要】：電能質(zhì)量關(guān)系到整個(gè)電電力系統(tǒng)安全、穩(wěn)定、經(jīng)濟(jì)、可靠運(yùn)行。隨著國民經(jīng)濟(jì)的高速發(fā)展,大量電力電子設(shè)備和非線性負(fù)荷在電力系統(tǒng)中的應(yīng)用,注入電網(wǎng)中的諧波越來越來,對電網(wǎng)及用電設(shè)備造成了很大的危害,致使電能質(zhì)量不斷惡化,甚至惡化電網(wǎng)的運(yùn)行狀況。隨著電力部門及電力用戶對電能質(zhì)量的要求越來越高,因此有效的治理電網(wǎng)中的諧波,提高電能質(zhì)量變得尤為重要。論文首先闡述了電能質(zhì)量的基本內(nèi)容,諧波的基本概念以及國內(nèi)外對諧波的研究現(xiàn)狀；然后對諧波的來源、主要危害、評(píng)判標(biāo)準(zhǔn)進(jìn)行了詳細(xì)的闡述,概述了治理諧波的相關(guān)方法；針對某熱加工廠現(xiàn)狀,建立系統(tǒng)仿真模型,分析了系統(tǒng)兩段母線分列和并列運(yùn)行時(shí)的電能質(zhì)量相關(guān)指標(biāo),其中的諧波電流、諧波電壓和功率因數(shù)存在不合格問題；在此基礎(chǔ)上,設(shè)計(jì)了治理方案,采用靜止無功發(fā)生器(SVG)和固定電容器(Fixed Capacitor,簡稱FC)在母線側(cè)進(jìn)行補(bǔ)償,計(jì)算了相應(yīng)的補(bǔ)償容量和相應(yīng)的裝置的配置參數(shù)；通過CYME PSAF仿真軟件對系統(tǒng)模型進(jìn)行了仿真,結(jié)果表明補(bǔ)償后的系統(tǒng)母線側(cè)的諧波電流、諧波電壓和功率因數(shù)均滿足要求。因而該方法對消除諧波,改善電能質(zhì)量有實(shí)際意義。
[Abstract]:Power quality is related to the safety, stability, economy and reliable operation of the whole electric power system. With the rapid development of the national economy, a large number of power electronic equipment and nonlinear loads are applied in the power system. The harmonics injected into the power grid have caused great harm to the power grid and electrical equipment, resulting in the continuous deterioration of power quality and even the deterioration of the operation of the power grid. With the increasing requirements of power departments and power users for power quality, it is particularly important to effectively control harmonics in power grid and improve power quality. In this paper, the basic content of power quality, the basic concept of harmonics and the research status of harmonics at home and abroad are described in detail, and then the sources, main hazards and evaluation standards of harmonics are described in detail, and the related methods of harmonic control are summarized. According to the present situation of a heat processing plant, the system simulation model is established, and the related indexes of power quality when the two-stage bus is separated and run side by side are analyzed, in which the harmonic current, harmonic voltage and power factor are not up to standard. On this basis, the control scheme is designed, and the static reactive power generator (SVG) and fixed capacitor (Fixed Capacitor, are used to compensate on the bus side, and the corresponding compensation capacity and the configuration parameters of the corresponding device are calculated. The system model is simulated by CYME PSAF simulation software, and the results show that the harmonic current, harmonic voltage and power factor on the bus side of the compensated system meet the requirements. Therefore, this method is of practical significance to eliminate harmonics and improve power quality.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM711

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本文編號(hào)：2502895