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1. 发明授权

US4638238A Switching technique for thyristor-switched capacitors to achieve network damping 失效
标题翻译：用于晶闸管开关电容器的开关技术来实现网络阻尼
公开(公告)号：US4638238A
公开(公告)日：1987-01-20
申请号：US787283
申请日：1985-10-15
申请人： Laszlo Gyugyi , Mark G. Gernhardt
发明人： Laszlo Gyugyi , Mark G. Gernhardt
IPC分类号： G05F1/70 , H02J3/18 , H02M5/257
CPC分类号： H02M5/257 , H02J3/1828 , Y02E40/12 , Y02E40/30
摘要： In a static VAR generator for providing reactive power compensation to an ac network and including a thyristor-switched capacitor bank having the series combination of a capacitor, a bidirectional thyristor switch having gate drive, and a current limiting inductor with an applied voltage appearing across the combination with a current being conducted therethrough, a damping circuit and method for switching the thyristor switch to achieve damping of oscillatory transients generated by the switching of the capacitor in the network, comprising:determining the magnitude and polarity of a voltage difference .DELTA.v between the applied voltage V and the voltage across the capacitor Vc;determining the occurrence of the prepeak quadrant and the postpeak quadrant of the applied voltage V;removing the gate drive of the thyristor(a) during the prepeak quadrant of the applied voltage when the polarity of V is opposite to the polarity of the applied voltage;(b) during the postpeak quadrant of the applied voltage when the polarity of V is the same as that of the applied voltage; andapplying the gate drive of the thyristor(a) during the prepeak quadrant of the applied voltage when the polarity of V is the same as the polarity of the applied voltage;(b) during the postpeak quadrant of the applied voltage when the polarity of V is opposite to that of the applied voltage; and(c) at the occurrence of the voltage peak of the applied voltage whereby the enabling and disabling of the gate drive means by the gate drive enabling means provides damping of oscillations of the ac network caused by the switching of the capacitor.
摘要翻译：在用于向交流网络提供无功功率补偿的静态VAR发生器中，包括具有电容器的串联组合的晶闸管开关电容器组，具有栅极驱动的双向晶闸管开关和具有施加电压的限流电感器与通过其传导的电流的组合，用于切换晶闸管开关以实现由网络中的电容器的切换产生的振荡瞬变的阻尼的阻尼电路和方法，包括：确定电压差DELTA v的幅度和极性施加电压V和电容器Vc两端的电压; 确定所施加电压V的预制象限和后峰象限的发生; 当V的极性与所施加的电压的极性相反时，在所施加的电压的预制象限期间去除晶闸管（a）的栅极驱动; （b）当V的极性与所施加的电压相同时，在施加电压的后峰值象限期间; 以及当V的极性与所施加的电压的极性相同时，在所施加的电压的预制象限期间施加晶闸管（a）的栅极驱动; （b）当V的极性与施加电压的极性相反时，在施加电压的后峰象限期间; 以及（c）在所施加的电压的电压峰值出现时，由栅极驱动使能装置启动和禁止栅极驱动装置，由电容器的切换引起的交流网络的振荡的阻尼。

2. 发明授权

US5712587A Apparatus and method for simultaneously deactivating series-connected switching devices 失效
标题翻译：同时停用串联交换设备的装置和方法
公开(公告)号：US5712587A
公开(公告)日：1998-01-27
申请号：US628909
申请日：1996-04-08
申请人： Colin D. Schauder , Mark G. Gernhardt , Eric J. Stacey
发明人： Colin D. Schauder , Mark G. Gernhardt , Eric J. Stacey
IPC分类号： H03K17/10 , H03K17/72
CPC分类号： H03K17/105
摘要： An apparatus for use in the simultaneous deactivation of a set of series-connected switching devices includes gate command control logic to generate a gate command signal for application to a selected switching device of the set of series-connected switching devices. A command compensation circuit processes the gate command signal. The command compensation circuit includes a time differential measurement module that forms a time differential signal indicative of the time from the previous turn-off of the selected switching device and the previous turn-off of the last switching device in the set of series-connected switching devices. A time difference processing module of the command compensation circuit process the time differential signal and creates a delay signal. A delay module of the command compensation circuit delays the gate command signal in response to the delay signal. Each switching device of the set of series-connected switching devices includes a command compensation circuit. Consequently, the generated delay signals cause the series-connected switching devices to turn-off simultaneously.
摘要翻译：用于同时去激活一组串联连接的开关装置的装置包括门指令控制逻辑，以产生用于应用于该组串联开关装置的选定开关装置的栅极指令信号。指令补偿电路处理门命令信号。指令补偿电路包括时间差分测量模块，其形成时间差分信号，该时间差分信号表示在所选择的开关装置的先前断开时间的时间以及串联开关组中的最后一个开关装置的先前关断设备。指令补偿电路的时差处理模块处理时差信号并产生延迟信号。指令补偿电路的延迟模块响应延迟信号延迟门指令信号。串联的开关装置的各开关装置具有指令补偿电路。因此，产生的延迟信号使串联的开关装置同时关断。

3. 发明授权

US4719402A VAR generator system with minimal standby losses 失效
标题翻译： VAR发电机系统具有最小的待机损耗
公开(公告)号：US4719402A
公开(公告)日：1988-01-12
申请号：US943215
申请日：1986-12-18
申请人： Michael B. Brennen , Mark G. Gernhardt
发明人： Michael B. Brennen , Mark G. Gernhardt
IPC分类号： H02J3/18 , G05F1/70
CPC分类号： H02J3/1828 , Y02E40/12 , Y02E40/30
摘要： In a hybrid switched-capacitor controlled-reactor static VAR compensator including a fixed-capacitor, hysteresis on switching-OFF a switchable capacitor of the capacitance bank is performed with a minimal fixed-hysteresis at the entrance of the standby region and with a temporary and variable-hysteresis in relation to any operating point in the standby region whenever maintaining the capacitor OFF is required. Since the fixed-hysteresis operates most often to prevent switching-OFF of the capacitor while the variable-hysteresis will operate less often, the losses at standby are minimized during thyristor-switched capacitor operation through most of this.
摘要翻译：在包括固定电容器的混合开关电容器控制电抗器静态VAR补偿器中，关断时的迟滞电容组的可切换电容器在备用区域的入口处以最小的固定滞后执行，并且具有临时和需要在保持电容器关闭时相对于备用区域中的任何工作点的可变滞后。由于固定滞后操作最为频繁，以防止电容器的关断，而可变滞后将较不频繁地工作，所以在晶闸管开关电容器操作期间，待机时的损耗最小化。

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