Study on low-frequency resonance of the reactive compensation system of EAST

Abstract

Abstract:

The power supply of EAST contains a reactive compensation system, which consists of the fixed condenser and TCR. In order to prevent negative effects of parallel-resonance on EAST experiment and power net safety, the low-frequency resonance between the reactive compensation system and distributed inductance of the 10kV grid is analyzed, which shows that the low-frequency resonance point varies from 2.04 to 2.24 with the variance of TCR, and the 2nd harmonic current of EAST power supply will meet up to the national standard after amplified. The simulation on the entire system with MATLAB and PSCAD verifies the results above.

Key words: Reactive compensation system, Low-frequency resonance, Harmonic current amplification

摘要：

EAST电源系统包含一套由固定电容器和晶闸管控制电抗器(TCR)组成的无功补偿系统。为防止并联谐振影响EAST实验及电网安全，研究了EAST无功补偿系统与10kV电网分布电感之间的低频谐振。分析表明，在TCR投入量不断变化时，系统的低频谐振点在2.04~2.24之间， EAST电源产生的二次谐波电流被放大后在国家标准允许范围内。MATLAB和PSCAD对整个系统的仿真结果验证了上述结果的正确性。

关键词: 无功补偿系统, 低频谐振, 谐波电流放大

CLC Number:

TL62+3

LI Min, XU Liu-wei. Study on low-frequency resonance of the reactive compensation system of EAST[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2012, 32(3): 246-249.

李敏，许留伟. EAST无功补偿系统低频谐振研究[J]. 核聚变与等离子体物理, 2012, 32(3): 246-249.

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Study on low-frequency resonance of the reactive compensation system of EAST

EAST无功补偿系统低频谐振研究

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