【摘要】：隨著大電網(wǎng)發(fā)展,半波長交流輸電技術(shù)受到關(guān)注。采用雙回半波長線路構(gòu)成點(diǎn)對網(wǎng)雙落點(diǎn)系統(tǒng),兩落點(diǎn)之間產(chǎn)生穿越功率,對線路潮流分布產(chǎn)生重要影響。為深入研究該問題,該文基于分布參數(shù)傳輸線方程,從理論上推導(dǎo)半波長線路輸送功率和首末端電壓的關(guān)系,提出了點(diǎn)對網(wǎng)雙落點(diǎn)系統(tǒng)中穿越功率的概念和定義,并研究其機(jī)制、特性,分析了穿越功率與落點(diǎn)母線電壓的關(guān)系,通過仿真驗(yàn)證了理論分析結(jié)果。結(jié)果表明,因半波長線路極小的等值電抗,功率與電壓關(guān)系具有與常規(guī)交流線路不同的"反向特性",對點(diǎn)對網(wǎng)雙落點(diǎn)系統(tǒng),穿越功率由落點(diǎn)母線電壓和電源功率決定;當(dāng)無電源送出時(shí),穿越有功僅與落點(diǎn)母線電壓幅值的平方差線性相關(guān),穿越無功與母線相角差強(qiáng)相關(guān)。最后,得到了半波長系統(tǒng)運(yùn)行與控制的相關(guān)結(jié)論。
[Abstract]:With the development of large power grid, half-wavelength AC transmission technology has attracted much attention. The double half-wavelength transmission line is used as the point of the net double landing point system, and the crossing power is generated between the two landing points, which has an important effect on the distribution of the line power flow. In order to study this problem deeply, based on the distributed parameter transmission line equation, the relationship between the transmission power of half-wavelength transmission line and the terminal voltage is derived theoretically, and the concept and definition of traversing power in point-to-network double-drop point system are proposed. The mechanism and characteristics of the system are studied, and the relationship between the crossing power and the bus voltage is analyzed, and the theoretical results are verified by simulation. The results show that because of the minimal equivalent reactance of the half-wavelength line, the relationship between power and voltage has a "reverse characteristic" different from that of the conventional AC line. The crossing power is determined by the drop point bus voltage and the power of the power supply. When there is no power supply, the crossing active power is only linearly related to the square difference of the voltage amplitude of the drop point bus, and the crossing reactive power is strongly related to the phase angle difference of the bus. Finally, some conclusions about the operation and control of half-wavelength system are obtained.
【作者單位】： 上海交通大學(xué)電氣工程系;中國電力科學(xué)研究院;
【基金】：國家電網(wǎng)公司科技項(xiàng)目(XT71-16-001)~~
【分類號】：TM721.2

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