半波长交流输电点对网双落点系统的穿越功率特性
发布时间：2018-09-04 20:56
【摘要】：随着大电网发展,半波长交流输电技术受到关注。采用双回半波长线路构成点对网双落点系统,两落点之间产生穿越功率,对线路潮流分布产生重要影响。为深入研究该问题,该文基于分布参数传输线方程,从理论上推导半波长线路输送功率和首末端电压的关系,提出了点对网双落点系统中穿越功率的概念和定义,并研究其机制、特性,分析了穿越功率与落点母线电压的关系,通过仿真验证了理论分析结果。结果表明,因半波长线路极小的等值电抗,功率与电压关系具有与常规交流线路不同的"反向特性",对点对网双落点系统,穿越功率由落点母线电压和电源功率决定;当无电源送出时,穿越有功仅与落点母线电压幅值的平方差线性相关,穿越无功与母线相角差强相关。最后,得到了半波长系统运行与控制的相关结论。
[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.
【作者单位】： 上海交通大学电气工程系;中国电力科学研究院;
【基金】：国家电网公司科技项目(XT71-16-001)~~
【分类号】：TM721.2
本文编号：2223305
[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.
【作者单位】： 上海交通大学电气工程系;中国电力科学研究院;
【基金】：国家电网公司科技项目(XT71-16-001)~~
【分类号】：TM721.2
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