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    • 2. 发明授权
    • Electrically isolated approach to sensing dc voltages referenced to a
floating ground
    • 用于感测参考浮地的直流电压的电隔离方法
    • US5392218A
    • 1995-02-21
    • US75965
    • 1993-06-14
    • Jeffery Emmerich
    • Jeffery Emmerich
    • G01D9/00G01R33/00G01R19/00G01R21/133
    • G01D9/005
    • An analog isolation barrier data acquisition system comprises a plurality of satellite sampling modules which are referenced to remote grounds for sensing direct current (dc) voltages which are referenced to these remote grounds. The satellite sampling modules are capable of monitoring several signals which are referenced to its local ground system, and are comprised of three functional blocks: a signal selection block which allows proper selection of the dc voltage signal to be monitored; a modulation block which modulates the selected dc voltage signal to produce a modulated waveform; and a barrier coupling block which transfers waveform information contained in the modulated waveform from the local floating ground reference system to an analog ground reference system. A central control module, coupled to each of the satellite sampling modules and referenced to the analog ground system, is comprised of three functional blocks: a waveform generation block which generates a basis waveform for use by the modulation blocks; a circuit block which demodulates the modulated waveform information produced by the modulation block of each satellite sampling module; and a master control block for generating control logic signals which are based on information received from the basis waveform generation block.
    • 模拟隔离屏障数据采集系统包括多个卫星采样模块,这些卫星采样模块参考用于感测直流(dc)电压的远程接地,参考这些遥控接地。 卫星采样模块能够监测与其本地接地系统相关的几个信号,并且包括三个功能块:信号选择块,其允许正确选择要监视的直流电压信号; 调制块,其调制所选择的直流电压信号以产生调制波形; 以及阻挡耦合块,其将包含在调制波形中的波形信息从局部浮地参考系统传送到模拟地参考系。 耦合到每个卫星采样模块并参考模拟地面系统的中央控制模块由三个功能块组成:波形产生模块,其生成由调制块使用的基本波形; 解调由每个卫星采样模块的调制块产生的调制波形信息的电路块; 以及用于产生基于从基本波形生成块接收的信息的控制逻辑信号的主控制块。
    • 3. 发明授权
    • Breaker fail-safe system for a multi-channel electric power generating
system
    • 多通道发电系统的断路器故障安全系统
    • US5400205A
    • 1995-03-21
    • US079113
    • 1993-06-17
    • Robert D. LigonJeffery Emmerich
    • Robert D. LigonJeffery Emmerich
    • H02H3/05H02H7/26H02H3/00
    • H02H7/266H02H3/05
    • A nonvolatile fail-safe system providing protection from bus fault propagation for a multi-channel electric power generating system includes a controller which provides excitation control and protection for a first generator unit, position control for its generator control breaker (GCB) and position control for a bus tie breaker (BTB); protection logic which generates a trip signal for the BTB when a bus fault is detected isolating the load distribution bus from the tie bus, and thereafter generating an excitation isolation control signal and a GCB trip signal isolating the load distribution bus from the generator unit upon sustained presence of the bus fault. A latching generator control relay is electrically coupled in series with the excitation control and is responsive to the excitation isolation control signal for de-energizing the generator by isolating the excitation control. A circuit monitors the operational status of the controller and generates a breaker fail-safe signal upon sensing operation outside acceptable parameters; and fail-safe logic, responsive to the position status of the generator control relay at the instant of issuance of the breaker fail-safe signal, controls the position of the BTB upon failure of the controller.
    • 一种为多通道发电系统提供保护以避免总线故障传播的非易失性故障安全系统包括一个控制器,它为第一个发电机组提供励磁控制和保护,其发电机控制断路器(GCB)的位置控制和位置控制 总线断路器(BTB); 当检测到总线故障时,产生用于BTB的跳闸信号的保护逻辑,将负载分配总线与连接总线隔离,之后产生激励隔离控制信号和GCB跳闸信号,以将负载分配总线与发电机单元隔离 总线故障的存在。 闩锁发生器控制继电器与激励控制串联电耦合,并且响应于激励隔离控制信号,以通过隔离励磁控制来使发电机断电。 电路监视控制器的运行状态,并在感测到可接受的参数之外的操作时产生断路器故障安全信号; 和故障安全逻辑,在断路器故障安全信号发出时响应于发电机控制继电器的位置状态,在控制器发生故障时控制BTB的位置。