【摘要】：無功功率不足及電壓質(zhì)量不合格是我國農(nóng)村配電網(wǎng)中長期存在的問題,常用的并聯(lián)電容補償并不能很好地解決薄弱配電網(wǎng)的電壓質(zhì)量問題。因此,如何利用串聯(lián)補償?shù)姆绞?提高農(nóng)村電網(wǎng)末端電壓,保障居民用電質(zhì)量已經(jīng)成為電力公司需要解決的關(guān)鍵問題。本文針對這樣的研究背景,對串聯(lián)補償技術(shù)在10kV配電網(wǎng)(農(nóng)網(wǎng))中的應(yīng)用進行了研究。本文研究的過程中,在對串聯(lián)電容補償?shù)睦碚摶A(chǔ)和分析方法進行分析的基礎(chǔ)之上,探討了串聯(lián)電容補償在10kV網(wǎng)絡(luò)中的適應(yīng)性。通過分析可以看出,在10kV配電網(wǎng)(農(nóng)網(wǎng))中,負荷功率因數(shù)越低,串聯(lián)電容補償?shù)碾妷赫{(diào)節(jié)效應(yīng)越明顯;對于平穩(wěn)負荷和波動負荷,串聯(lián)補償均能有效減小系統(tǒng)電壓偏差并抑制電壓波動。針對串聯(lián)補償在使用中存在的問題,本文首先對串聯(lián)補償電容器投入后引起的鐵磁諧振現(xiàn)象進行仿真,并且根據(jù)其引起的電壓異常問題,提出了利用具有飽和特性的電抗線圈改變電容補償度的方案。通過仿真驗證可以看出,本文提出的方案對于抑制線路鐵磁諧振現(xiàn)象,并改善線路電壓質(zhì)量有很好的效果。理論分析的基礎(chǔ)之上,本文將串聯(lián)補償技術(shù)應(yīng)用到廣西河池10kV農(nóng)網(wǎng)超長距離供電線路的實際項目中,確定具體串補方案,并通過技術(shù)和經(jīng)濟性分析可以看出,由于串補電容器的作用,線路末端的電壓質(zhì)量得到了改善,同時大大提升了線路的輸送能力,有效的緩解了由于末端電壓低而導(dǎo)致的輸送能力受限的瓶頸。通過本文的研究,不僅驗證了串聯(lián)補償技術(shù)在10kV農(nóng)村配電網(wǎng)中應(yīng)用的適用性,同時本文提出的新型串聯(lián)補償方案,為抑制配電線路發(fā)生鐵磁諧振,改善線路的電壓質(zhì)量,提高10kV農(nóng)村配電網(wǎng)輸電送電能力提供了新的解決方法。同時也對于其他電網(wǎng)合理的設(shè)置串聯(lián)補償方案提供了借鑒和參考。
[Abstract]:Lack of reactive power and unqualified voltage quality are long-standing problems in rural distribution networks in China. The commonly used shunt capacitor compensation can not solve the voltage quality problem of weak distribution networks. Therefore, how to use series compensation to improve the terminal voltage of rural power grid and ensure the quality of electricity consumption has become a key problem to be solved by power companies. In this paper, the application of series compensation technology in 10kV distribution network is studied. In this paper, the adaptability of series capacitor compensation in 10kV network is discussed on the basis of analyzing the theoretical basis and analysis method of series capacitance compensation. It can be seen from the analysis that the lower the load power factor in the 10kV distribution network, the more obvious the voltage regulation effect of the series capacitor compensation; for the stationary load and fluctuating load, Series compensation can effectively reduce system voltage deviation and restrain voltage fluctuation. Aiming at the problems of series compensation in use, this paper first simulates the ferromagnetic resonance phenomenon caused by the series compensation capacitor, and according to the voltage anomaly caused by it, A scheme of changing capacitance compensation degree by using reactance coil with saturation characteristic is proposed. The simulation results show that the proposed scheme can restrain the ferroresonance phenomenon and improve the voltage quality of the line. On the basis of theoretical analysis, this paper applies the series compensation technology to the actual project of the ultra long distance power supply line of Guangxi Hechi 10kV rural power network, and determines the specific series compensation scheme, and through the technical and economic analysis, it can be seen that, Because of the function of series compensation capacitor, the voltage quality at the end of the line is improved, and the transmission capacity of the line is greatly improved, which effectively alleviates the bottleneck caused by the limited transmission capacity caused by the low terminal voltage. The research in this paper not only verifies the applicability of series compensation technology in 10kV rural distribution network, but also proposes a new series compensation scheme to restrain ferromagnetic resonance and improve the voltage quality of distribution line. Improving the transmission capacity of 10kV rural distribution network provides a new solution. At the same time, it also provides reference and reference for other power grid to set up series compensation scheme reasonably.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM714.3

【參考文獻】

相關(guān)期刊論文 前10條

1 關(guān)永剛;郭s鉉，

本文編號：2192919