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1.发明授权
公开(公告)号：US4538196A
公开(公告)日：1985-08-27
申请号：US487480
申请日：1983-04-22
申请人： Shan C. Sun , James P. Garitty
发明人： Shan C. Sun , James P. Garitty
CPC分类号： H02H7/263
摘要： A new protective relay for determining the occurrence of a single-phase-to-ground fault and tripping the appropriate circuit breaker. At local and remote terminals of a protected line segment, three signals representative of an electrical parameter on each phase conductor are input to a local and remote protective relay. In both the local and remote protective relays, the three electrical parameter signals are manipulated to produce two evaluation signals. The two local evaluation signals produced in the local protective relay are transmitted to the remote protective relay, and the two remote evaluation signals produced in the remote protective relay are transmitted to the local protective relay. In the local protective relay the two local evaluation signals are manipulated to produce a third local evaluation signal, and the two remote evaluation signals are manipulated to produce a third remote evaluation signal. The six evaluation signals are vectorially-compared to determine on which phase the fault has occurred. Only the circuit interrupter associated with the faulted phase conductor is tripped. If a fault involves two or more phase conductors, all three circuit interrupters are tripped. Similar signal processing occurs in the remote protective relay.
摘要翻译： 一种新的保护继电器，用于确定单相接地故障的发生并跳闸适当的断路器。 在受保护线路段的本地和远程终端，表示每个相导体上的电气参数的三个信号被输入到本地和远程保护继电器。 在本地和远程保护继电器中，操作三个电参数信号以产生两个评估信号。 本地保护继电器产生的两个本地评估信号被传送到远程保护继电器，远程保护继电器中产生的两个远程评估信号传输到本地保护继电器。 在本地保护继电器中，操纵两个本地评估信号以产生第三局部评估信号，并操纵两个远程评估信号以产生第三远程评估信号。 六个评估信号进行矢量比较，以确定故障发生在哪个阶段。 只有与故障相导体相关的断路器才会跳闸。 如果故障涉及两个或多个相导体，则所有三个断路器都跳闸。 远程保护继电器中发生类似的信号处理。
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2.发明授权Electric power system with remote monitoring and control of protective relays 失效具有远程监控和保护继电器控制的电力系统
公开(公告)号：US4972290A
公开(公告)日：1990-11-20
申请号：US414975
申请日：1989-09-29
申请人： Shan C. Sun , John S. Wargo , James P. Garitty
发明人： Shan C. Sun , John S. Wargo , James P. Garitty
摘要： Monitoring and control of analog electromechanical protective relays and digital mcroprocessor based relays is integrated through a system including slave stations which record and time tag contact activity at each of the analog relays. The slave stations continuously retain digital samples of a predetermined number of the most recent cycles of the currents and voltages at the analog relays and when a trip occurs store the retained samples as pre-fault values together with a preset number of post-fault samples. A master station communicates with the slave stations monitoring the analog relays and with the digital relays through a two way communications network. The master station repetitively polls the slave stations and digital relays for contact activity. Detailed data such as the time tags and pre-fault and post-fault currents and voltages are then requested from those stations reporting contact activity. Either the slave stations or master station calculate fault location and type from the fault voltages and currents, an periodically calculate routine metering parameter such as watts and VARs.
摘要翻译： 模拟机电保护继电器和基于数字微处理器的继电器的监测和控制通过包括从站在内的系统进行集成，该从站记录每个模拟继电器的时间标签接触活动。 从站在模拟继电器处连续地保持预定数量的最近的电流和电压周期的数字采样，并且当跳闸发生时，将保留的采样作为预故障值与预设数量的故障后样本一起存储。 主站通过双向通信网络与监控模拟继电器和数字继电器的从站进行通信。 主站重复轮询从站和数字继电器进行接触活动。 然后从报告接触活动的那些站请求诸如时间标签和故障前和故障后电流和电压的详细数据。 从站或主站都可以根据故障电压和电流来计算故障位置和类型，定期计算例如瓦特和VAR的常规测量参数。
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公开(公告)号：US4246623A
公开(公告)日：1981-01-20
申请号：US940801
申请日：1978-09-08
申请人： Shan C. Sun
发明人： Shan C. Sun
CPC分类号： H02H3/0935 , H02H1/066
摘要： An electrical device for protecting an alternating current network in which a static inverse time-overcurrent relay obtains network current information and relay circuit operating power from a current transformer having two secondary windings. Low transformer burden and accurate network information signals that are linearly responsive to a wide range of network current magnitudes are achieved through the use of a switching circuit that prevents the simultaneous operation of both secondary windings. The relay circuit employs an RC network with a short, precision time constant for curve shaping and employs digital counting techniques to provide time delay multiplication, precision time scale selection and a variable delay time variable in accordance with the magnitude of system current.
摘要翻译： 一种用于保护交流网络的电气设备，其中静态反时限过电流继电器从具有两个次级绕组的电流互感器获得网络电流信息并中继电路工作功率。 通过使用防止两个次级绕组的同时操作的开关电路来实现对宽范围的网络电流幅度线性响应的低变压器负载和精确的网络信息信号。 继电器电路使用RC网络，具有短的精确时间常数用于曲线整形，并采用数字计数技术，根据系统电流的大小提供时间延迟乘法，精确时标选择和可变延迟时间变量。
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4.发明授权
公开(公告)号：US4675775A
公开(公告)日：1987-06-23
申请号：US808769
申请日：1985-12-13
申请人： Shan C. Sun , Russell W. Gonnam
发明人： Shan C. Sun , Russell W. Gonnam
摘要： Active pilot wire apparatus for replacing a passive continuous metallic wire pair coupling between the electromechanical units of a conventional electromechanical pilot wire protective relay is disclosed. For the protection of a power line section, an electromechanical unit is coupled to each end thereof. Each electromechanical unit includes an operating relay coil which when energized operates breaker contacts to interrupt current through the protected power line section. A signal representative of the potential across the operating coil of each electromechanical unit is transmitted through an active communication channel to the other electromechanical unit where it is buffered by a high impedance amplifier. In each case, the output signal of the buffer amplifier is representative substantially of the corresponding operating relay coil potential. An impedance element is coupled between each buffer amplifier and the other operating relay coil. Current is diverted from the operating relay coil of each electromechanical unit through the corresponding coupled impedance element in accordance with the potential of the signals coupled thereacross. The active pilot wire apparatus may be extended to the coupling of a plurality of electromechanical units to form a current differential protective relay operative to protect against faults in a corresponding plurality of sets of power lines with each set constituting a current path of a power system network.
摘要翻译： 公开了一种用于替代常规机电导线保护继电器的机电单元之间的被动连续金属线对耦合的主动导线装置。 为了保护电力线部分，机电单元耦合到其每端。 每个机电单元包括操作继电器线圈，其在通电时操作断路器触点以中断通过受保护电力线部分的电流。 表示每个机电单元的操作线圈两端的电位的信号通过有源通信信道传输到另一个机电单元，在那里它被高阻抗放大器缓冲。 在每种情况下，缓冲放大器的输出信号基本上代表相应的操作继电器线圈电位。 阻抗元件耦合在每个缓冲放大器和另一个操作继电器线圈之间。 根据耦合到其上的信号的电位，电流通过相应的耦合阻抗元件从每个机电单元的操作继电器线圈转向。 有源引导线装置可以扩展到多个机电单元的耦合，以形成电流差动保护继电器，其可操作用于防止相应的多组电力线路中的故障，每组电力线组构成电力系统网络的电流路径 。
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公开(公告)号：US4293886A
公开(公告)日：1981-10-06
申请号：US104647
申请日：1979-12-17
申请人： Larry L. Church , David R. Smith , Shan C. Sun
发明人： Larry L. Church , David R. Smith , Shan C. Sun
CPC分类号： H02H3/387
摘要： A network protector relay produces a close signal entirely from sequence components based on the magnitude and phase relationships between the positive sequence component of the phase-to-ground voltages on the network side of the protector and the positive sequence component of the phasing voltages. The close signal may be inhibited by either the presence of the negative sequence component of the phase-to-ground voltages on the network side of the protector or if a trip contact is closed. The trip contact will be closed under certain specified conditions which make it advantageous to prevent manual closing of the contacts.
摘要翻译： 网络保护器继电器基于保护器网络侧的相对地电压的正序分量与相位电压的正序分量之间的幅度和相位关系，从序列分量完全产生闭合信号。 通过存在保护器的网络侧上的相对地电压的负序分量或者如果跳闸触点闭合，可以禁止闭合信号。 跳闸触点将在某些特定条件下关闭，这有利于防止触点的手动关闭。
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6.发明授权Direct transfer trip apparatus for use with an active pilot wire communications channel 失效直接传输跳闸装置，用于主动导频线通信信道
公开(公告)号：US4675774A
公开(公告)日：1987-06-23
申请号：US808768
申请日：1985-12-13
申请人： Russell W. Gonnam , Shan C. Sun
发明人： Russell W. Gonnam , Shan C. Sun
CPC分类号： H02H7/262
摘要： Direct transfer trip apparatus for sharing a common active communication channel utilized for signal transfer between at least two electromechanical units which form a current differential protective relay for protecting at least one power line in a power system network is disclosed. Each electromechanical unit includes an operating relay coil for effecting an interruption of current through the protected power line when an internal fault of the power line is detected. The direct transfer trip function induces signals to be transmitted through the common active communication channel either upstream or downstream from a faulted power line section where a breaker has failed to open. These direct transfer trip signals are supplied directly to an upstream or downstream breaker unit to operate the breaker to interrupt current through the faulted section independent of the energization of its corresponding operating relay coil. The direct transfer trip apparatus not only performs the aforementioned direct transfer trip function, but also permits disabling of the operating relay coil from effecting a power line interruption inadvertently. Accordingly, an inadvertent current interruption of the power line section by a corresponding operating relay coil is precluded during the transmission of the direct transfer trip signal over the common active communication channel.
摘要翻译： 公开了用于共享用于在形成用于保护电力系统网络中的至少一个电力线路的电流差动保护继电器的至少两个机电单元之间的信号传递的公共有源通信信道的直接传输跳闸装置。 每个机电单元包括操作继电器线圈，用于当检测到电力线的内部故障时，实现通过受保护电力线的电流中断。 直接传输跳闸功能可以在断路器未能打开的故障电源线部分的上游或下游通过通用有源通信信道传输信号。 这些直接传输跳闸信号被直接提供给上游或下游断路器单元，以操作断路器以中断不经其相应的运行继电器线圈通电的故障部分的电流。 直接传输跳闸装置不仅执行上述的直接传输跳闸功能，而且允许操作继电器线圈无效地使电源线中断。 因此，在通过公共有源通信信道发送直接传输跳闸信号期间，排除了相应的操作继电器线圈对电力线路部分的无意的电流中断。
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公开(公告)号：US4471286A
公开(公告)日：1984-09-11
申请号：US367143
申请日：1982-04-09
CPC分类号： H02P9/00
摘要： In a motor-generator set, the frequency of the AC generator outputted voltage is automatically adjusted by field winding regulation of the DC motor, through a closed loop in which a dual-slope converter is charged during a clock-defined time interval in accordance with a potentiometer setpoint, and the charging plus discharging period of the dual slope converter encompasses the period of the outputted voltage.
摘要翻译： 在电动发电机组中，交流发电机输出电压的频率通过直流电动机的励磁绕组调节自动调节，通过闭环，其中双斜率转换器在时钟定义的时间间隔期间根据 电位器设定点和双斜率转换器的充电加放电周期包括输出电压的周期。
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公开(公告)号：US4464697A
公开(公告)日：1984-08-07
申请号：US397758
申请日：1982-07-13
申请人： Shan C. Sun
发明人： Shan C. Sun
CPC分类号： H02H7/262
摘要： Protective relaying apparatus of the pilot type, incorporating a direct transfer trip function (DTT) which reliably and securely utilizes the same communication channel utilized by the pilot relaying function. The DTT function operates within the constraints of a PPM modem, utilizing a signal extracted from the carrier signal, to provide a perfectly synchronized tone for the DTT signal.
摘要翻译： 导频类型的保护中继装置，结合了直接传输跳闸功能（DTT），可靠且可靠地利用导频中继功能使用的相同通信信道。 DTT功能在PPM调制解调器的约束下运行，利用从载波信号提取的信号，为DTT信号提供完美同步的音调。
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9.发明授权
公开(公告)号：US4106071A
公开(公告)日：1978-08-08
申请号：US757178
申请日：1977-01-06
申请人： Shan C. Sun , Larry L. Church
发明人： Shan C. Sun , Larry L. Church
CPC分类号： H02H3/46
摘要： Apparatus for protecting a power system or a portion thereof against the effects of subsynchronous current oscillations is disclosed. A signal representative of or proportional to the subsynchronous current is developed via synchronous modulation and bandpass filter techniques. This signal is fully rectified to produce a waveform from which information can be garnered from both the positive and negative half-cycles.A peak holding and peak status circuit then compares successive peaks of the rectified signal, which circuit is adapted to recognize only those peaks having increasing amplitude. The output of the peak holding and peak status circuit is utilized by three comparator circuits which individually employ differing reference voltage levels for overall evaluation purposes.Given a predetermined frequency range of interest for the subsynchronous current, three timing circuits are used to insure that recognizable peaks of the rectified signal fall into the range of interest and exist for a predetermined evaluation time period. The evaluation time period is automatically changed by one of the comparator circuits if the instantaneous subsynchronous current exceeds its predetermined threshold level. A trip and count signal is then generated by the detection apparatus, regardless of the time period used for evaluation.
摘要翻译： 公开了用于保护电力系统或其部分免受次同步电流振荡的影响的装置。 代表或与次同步电流成比例的信号是通过同步调制和带通滤波技术开发的。 该信号被完全整流以产生可以从正半周期和负半周期获得信息的波形。
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公开(公告)号：US4075559A
公开(公告)日：1978-02-21
申请号：US598611
申请日：1975-07-24
摘要： An input signal supplied to a signal measuring circuit is either amplified or attenuated as necessary to establish the magnitude of the input signal within the defined dynamic range of the measuring circuit and the output signal developed by the measuring circuit is subsequently readjusted through amplification or attenuation to develop an output signal which corresponds to the magnitude of the initial input signal.
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