Subsynchronous Resonance Damping Control of Thyristor-Controlled Series Capacitor
Subsynchronous Resonance Damping Control of Thyristor-Controlled Series Capacitor
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DOI：
10.1109/mper.2002.4312612
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发表时间：
2002-09
期刊：
影响因子：
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通讯作者：
N. Kakimoto;Anan Phongphanphanee
中科院分区：
文献类型：
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作者：
N. Kakimoto;Anan Phongphanphanee
晶闸管控制的串联电容器(TCSC)大大提高了输电能力。它还缓解了伴随传统串联电容器的次同步谐振(SSR)。当晶闸管触发角度适当时，电气损耗几乎为零，这称为SSR中性点。这种品质来自于TCSC本身。但在触发角170~800°范围内，晶闸管仍存在较大的负阻尼值，此时流过晶闸管的电流很少。本文研究的是射击角度的控制。首先，我们在给定的频率下振荡起爆角，并提出了一种计算电阻尼值的解析方法。其次，我们证明了如果触发角振荡与转子角振荡是同相的，那么在所有频率下，阻尼值都会得到改善。然而，同步扭矩会降低，因此必须对控制增益进行限制。最后，我们进行了数值模拟来验证我们的分析结果。
A thyristor-controlled series capacitor (TCSC) substantially improves transmission capacity. It also mitigates subsynchronous resonance (SSR) accompanying conventional series capacitors. With an appropriate angle of thyristor firing, electrical damping becomes almost zero, which is called SSR neutral. This quality comes from TCSC itself. However, negative damping still remains and is large for firing angle 170~800° where little current flows through thyristors. This paper deals with control of firing angle. First, we oscillate the firing angle at a given frequency, and present an analytical method of calculating electrical damping. Next, we show that the damping improves at all frequencies if the firing angle oscillation is in phase with that of rotor angle. Synchronizing torque decreases, however, so a limit must be put on the control gain. Lastly, we execute numerical simulations to verify our analytical results.