| 特高压输电线的运行特性与变电站的无功补偿 |
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| 引用本文： | 林莉,成涛,孙才新. 特高压输电线的运行特性与变电站的无功补偿[J]. 高电压技术, 2009, 35(7): 1533-1539 |
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| 作者姓名： | 林莉 成涛 孙才新 |
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| 作者单位： | 1. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400030
2. 重庆市电力公司北碚供电局,重庆,400700 |
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| 基金项目： | 重庆大学人才引进基金~~ |
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| 摘 要： | 特高压输电是大电网的发展方向,分析特高压输电线路的运行特性和变电站的无功补偿极为重要。为此,建立了由分布参数表达的输电线的功角特性方程,导出了送端恒电压、受端恒功率因数控制下输电线的P-U特性方程,利用运行圆图导出输电线的失步功角和极限传输功率的算式以及产生工频过电压的传输功率区间和最大过电压标么值的算式。研究表明,输电线的传输能力随受端功率因数的上升而提高,但其过电压的功率区间和最大过电压标么值也随之增大。两端恒电压控制可显著提高输电线的传输能力。提出以变电站母线电压和输电线的有功为给定值计算变电站无功补偿量的方法并导出了相应的算式。以晋东南—南阳—荆门特高压输电线为例比较了两种控制方式下的传输能力,给出了各变电站的无功补偿量。
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| 关 键 词： | 特高压输电 变电站 运行特性 功角特性 功率-电压特性 工频过电压 无功补偿 |
Operation Characteristic of Ultra-high Voltage Transmission Line and Reactive Power Compensation of Substation |
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| LIN Li , CHENG Tao , SUN Cai-xin. Operation Characteristic of Ultra-high Voltage Transmission Line and Reactive Power Compensation of Substation[J]. High Voltage Engineering, 2009, 35(7): 1533-1539 |
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| Authors: | LIN Li CHENG Tao SUN Cai-xin |
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| Affiliation: | 1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology;Chongqing University;Chongqing 400030;China;2.Beibei Power Supply Bureau of Chongqing Electric Power Company;Chongqing 400700;China |
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| Abstract: | Ultra-high voltage(UHV)transmission is the development tendency of power grid in China.It is important to analyze operation characteristic of UHV transmission line and reactive power compensation of substation.We put forward the power-angle characteristic equations described by the distributed parameters for UHV transmission line,and derived equations of P-U characteristic with control mode of constant voltage at the sending end and constant power factor at the receiving end of transmission line.Using opera... |
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| Keywords: | ultra-high voltage transmission substation operation characteristic power-angle characteristic P-U characteristic power frequency overvoltage reactive power compensation |
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