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固态断路器和电流限制器用发射极可关断晶体管的运行特性 被引量:1

Operation Characteristics of Emitter Turn-Off Thyristor (ETO) for Solid-State Circuit Breaker and Fault Current Limiter
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摘要 在配电系统中所应用的固态断路器和电流限制器与电动机械断路器相比较具有速度快、使用寿命长等优点。本文提供最新开发出的发射极可关断晶体管半导体电力开关在瞬态开断过程中的运行特性。在开关关断瞬间,开关的电流变化率dIG/dt性能被提高到12kA/μs。实验结果显示:一个75mm的ETO可以安全地关断8kA电流,而尺寸大小一样地GTO仅仅开断3kA电流。而且,由于电流传感器的应用,使得门极驱动实现自能化。因此,ETO在电力系统的广泛应用可以大大降低系统的整体费用。可见,ETO适合于制作固态断路器和电流限制器,其工作特性是关断速度快、关断大电流的能力强,通态损耗低,而且结构简单。 Solid-state circuit breakers and current limiter can provide significant advantages in speed, lifetime and functionality compared to electromechanical switchgear used in distribution systems. The paper presents the operation characteristics of emerging ETO semiconductor power switch during turn-off transient. The gate commutating rate at turn-off, dIG/dt, is improved to as higher as 12kA/μs. Experimental results demonstrates that a 75 mm ETO can safety interrupt 8kA current instead of 3 kA in GTO mode. Moreover, thanks to the built-in current sensor and the self-power generation for the gate driver, ETO will largely lower the cost of whole system. This device is suitable for solid-state circuit breaker and fault current limiter with its very fast switching speed, high current interruption capability, low conduction loss and compact structure.
作者 谭东现
出处 《电气技术》 2007年第11期38-42,共5页 Electrical Engineering
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