本文選題：靜止同步補(bǔ)償器 + 級聯(lián)　； 參考：《中國礦業(yè)大學(xué)》2014年碩士論文

【摘要】：隨著經(jīng)濟(jì)的發(fā)展，國家對電能質(zhì)量的要求愈來愈高，而無功補(bǔ)償及諧波治理問題是制約電能質(zhì)量提高的關(guān)鍵因素。在中高壓場合，STATCOM是動(dòng)態(tài)無功補(bǔ)償與諧波治理領(lǐng)域的最新技術(shù)和發(fā)展方向，其相關(guān)的控制技術(shù)一直是人們研究的熱點(diǎn)。STATCOM裝置作為電力電子電流發(fā)生補(bǔ)償裝置，和有源濾波器、逆變器一樣，在并聯(lián)運(yùn)行條件下，不可避免的就是裝置之間的環(huán)流問題，，尤其在中壓多變壓器并列運(yùn)行下，母聯(lián)線路上受負(fù)荷不均影響的能量流動(dòng)更加劇了并聯(lián)的環(huán)流問題，甚至在諧波補(bǔ)償時(shí)引起STATCOM裝置電流發(fā)散退出運(yùn)行。本文針對中壓級聯(lián)型STATCOM的控制及其并聯(lián)運(yùn)行技術(shù)展開了相應(yīng)的研究，得到一種實(shí)用的多工況STATCOM多機(jī)并聯(lián)運(yùn)行控制技術(shù)。 本文首先從電能質(zhì)量問題出發(fā)，對電網(wǎng)進(jìn)行無功補(bǔ)償和諧波治理的必要性進(jìn)行了論述，并且對國內(nèi)外無功補(bǔ)償裝置的發(fā)展歷程和STATCOM裝置并聯(lián)技術(shù)的發(fā)展進(jìn)行了簡要的總結(jié)闡述。然后從STATCOM的基本原理出發(fā)，結(jié)合變電所實(shí)際的工況，對中壓級聯(lián)型STATCOM的主電路結(jié)構(gòu)進(jìn)行了詳細(xì)的設(shè)計(jì)，在確定其結(jié)構(gòu)的基礎(chǔ)上對其數(shù)學(xué)模型進(jìn)行了建立和并聯(lián)環(huán)流進(jìn)行了分析。 在對STATCOM模型建立的基礎(chǔ)上對中壓級聯(lián)型STATCOM的相關(guān)控制策略進(jìn)行了研究，詳細(xì)闡述了其調(diào)制技術(shù)、交流側(cè)控制方法和直流側(cè)電容電壓平衡方法，并通過相關(guān)的理論仿真驗(yàn)證，證明了所采用控制方法的可靠性和優(yōu)越性。 針對中壓級聯(lián)型STATCOM裝置在變電所并聯(lián)運(yùn)行的相關(guān)問題，對中壓級聯(lián)型STATCOM裝置的并聯(lián)運(yùn)行技術(shù)進(jìn)行了深入的研究，提出一種適合于多工況的基于改進(jìn)型相同電流采樣的STATCOM并聯(lián)運(yùn)行控制技術(shù)，并通過MATLAB進(jìn)行相關(guān)的模型仿真分析，驗(yàn)證了該控制方法的穩(wěn)定性和實(shí)用性。 文章進(jìn)一步對中壓級聯(lián)型STATCOM裝置并聯(lián)系統(tǒng)進(jìn)行了詳細(xì)的軟、硬件設(shè)計(jì)，最后通過兩臺±3.0Mvar的中壓級聯(lián)型STATCOM樣機(jī)對上述相關(guān)技術(shù)研究進(jìn)行了實(shí)際的實(shí)驗(yàn)測試和應(yīng)用效果分析，驗(yàn)證了本文所做中壓級聯(lián)型STATCOM相關(guān)技術(shù)研究設(shè)計(jì)的有效性和實(shí)用性。
[Abstract]:With the development of economy, the demand for power quality is becoming higher and higher. Reactive power compensation and harmonic control are the key factors restricting the improvement of power quality. Statcom is the latest technology and development direction in the field of dynamic reactive power compensation and harmonic control in the middle and high voltage field. The related control technology of Statcom is always a hot spot in people's research. Statcom is used as power electronic current compensation device and active power filter. The inverter is the same, under the condition of parallel operation, the circulation problem between the devices is inevitable, especially in the parallel operation of the medium voltage multi-transformer, the energy flow on the bus line is affected by the uneven load, which exacerbates the circulation problem of the parallel connection. Even in the harmonic compensation caused by the STATCOM device current divergence out of operation. In this paper, the control of cascaded STATCOM and its parallel operation technology are studied, and a practical multi-mode STATCOM parallel operation control technology is obtained. In this paper, the necessity of reactive power compensation and harmonic control is discussed, and the development history of reactive power compensator at home and abroad and the development of parallel technology of STATCOM are briefly summarized. Then, according to the basic principle of STATCOM and the actual working conditions of the substation, the main circuit structure of the medium-voltage cascaded STATCOM is designed in detail, and its mathematical model is established and the parallel circulation is analyzed on the basis of determining its structure. Based on the establishment of STATCOM model, the related control strategies of medium voltage cascaded STATCOM are studied. The modulation technology, AC side control method and DC side capacitor voltage balance method are described in detail. The reliability and superiority of the control method are proved. Aiming at the problems related to the parallel operation of the medium-voltage cascaded STATCOM device in the substation, the parallel operation technology of the medium-voltage cascaded STATCOM device is deeply studied. An improved parallel operation control technique for STATCOM based on the same current sampling is proposed in this paper. The stability and practicability of the control method are verified by the model simulation analysis of MATLAB. In this paper, the hardware and software of the parallel system of the medium-voltage cascaded STATCOM device are designed in detail. Finally, the experimental test and application effect analysis of the above related technology are carried out through two 鹵3.0Mvar cascaded STATCOM prototypes. The effectiveness and practicability of the research and design of the intermediate voltage cascade STATCOM related technology are verified.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM761

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本文編號：1809321