公开(公告)号：US09482699B2

公开(公告)日：2016-11-01

申请号：US14303591

申请日：2014-06-12

申请人： Gary R Hoffman ,  Edward S. Kwon ,  Mikhail Benis

发明人： Gary R Hoffman ,  Edward S. Kwon ,  Mikhail Benis

IPC分类号： G01R31/12 ,  G01R1/36 ,  G01R19/00 ,  G01R15/16 ,  G01R15/14 ,  G01R15/22

CPC分类号： G01R15/16 ,  G01R1/36 ,  G01R15/14 ,  G01R15/22 ,  G01R19/0084 ,  G01R31/1227 ,  G01R31/1245 ,  G01R31/1272

摘要： The voltage at the test tap of a high voltage bushing is applied to a bushing coupler which includes circuitry to sense and process voltages generated at the test tap and convert the voltages into corresponding data signals. Data signals corresponding to the test tap voltages are then transmitted wirelessly to a bushing monitoring system. The wireless transmission may be, for example, via an optical coupling (e.g., fiber optics) arrangement or an electromagnetic radiation (e.g., RF transmission) arrangement. Thus, the signals from the bushing coupler are wirelessly transmitted to a monitoring system which is not conductively connected to the bushing coupler and the test tap. The bushing coupler includes a power supply which is chargeable from the test tap or wirelessly from the bushing monitoring system which is adapted to receive values of the high voltage applied to the bushing and to calculate changes in the values of selected bushing parameters.

摘要翻译： 将高压套管的测试分接头处的电压施加到套管耦合器，其包括用于感测和处理在测试抽头产生的电压并将电压转换成相应数据信号的电路。 然后将与测试抽头电压相对应的数据信号无线地传输到套管监控系统。 无线传输可以例如经由光耦合（例如，光纤）布置或电磁辐射（例如，RF传输）布置。 因此，来自衬套耦合器的信号被无线地传输到监控系统，该监控系统不是导电地连接到衬套耦合器和测试水龙头。 衬套耦合器包括可从测试抽头充电的电源，或者无线地从衬套监控系统充电，该电源适于接收施加到衬套的高电压值，并计算所选衬套参数的值的变化。

公开(公告)号：US20140368215A1

公开(公告)日：2014-12-18

申请号：US14303591

申请日：2014-06-12

申请人： GARY R HOFFMAN ,  Edward S. Kwon ,  Mikhail Benis

发明人： GARY R HOFFMAN ,  Edward S. Kwon ,  Mikhail Benis

IPC分类号： G01R31/12

CPC分类号： G01R15/16 ,  G01R1/36 ,  G01R15/14 ,  G01R15/22 ,  G01R19/0084 ,  G01R31/1227 ,  G01R31/1245 ,  G01R31/1272

摘要： The voltage at the test tap of a high voltage bushing is applied to a bushing coupler which includes circuitry to sense and process voltages generated at the test tap and convert the voltages into corresponding data signals. Data signals corresponding to the test tap voltages are then transmitted wirelessly to a bushing monitoring system. The wireless transmission may be, for example, via an optical coupling (e.g., fiber optics) arrangement or an electromagnetic radiation (e.g., RF transmission) arrangement. Thus, the signals from the bushing coupler are wirelessly transmitted to a monitoring system which is not conductively connected to the bushing coupler and the test tap. The bushing coupler includes a power supply which is chargeable from the test tap or wirelessly from the bushing monitoring system which is adapted to receive values of the high voltage applied to the bushing and to calculate changes in the values of selected bushing parameters.

摘要翻译： 将高压套管的测试分接头处的电压施加到套管耦合器，其包括用于感测和处理在测试抽头产生的电压并将电压转换成相应数据信号的电路。 然后将与测试抽头电压相对应的数据信号无线地传输到套管监控系统。 无线传输可以例如经由光耦合（例如，光纤）布置或电磁辐射（例如，RF传输）布置。 因此，来自衬套耦合器的信号被无线地传输到监控系统，该监控系统不是导电地连接到衬套耦合器和测试水龙头。 衬套耦合器包括可从测试抽头充电的电源，或者无线地从衬套监控系统充电，该电源适于接收施加到衬套的高电压值，并计算所选衬套参数的值的变化。

公开(公告)号：US20130285671A1

公开(公告)日：2013-10-31

申请号：US13736927

申请日：2013-01-08

申请人： GARY R. HOFFMAN ,  EDWARD S. KWON ,  HONG CAI

发明人： GARY R. HOFFMAN ,  EDWARD S. KWON ,  HONG CAI

IPC分类号： G01R31/02

CPC分类号： G01R31/027 ,  G01R31/1227 ,  H02H3/093 ,  H02H3/52 ,  H02H5/005 ,  H02H7/04 ,  H02H7/0455

摘要： A protective system far a power transformer having a neutral line connected to ground where large currents can flow in the neutral line due to electro-magnetic disturbances. The system includes circuitry for: (a) sensing the current level in the neutral line and whether it exceeds a predetermined threshold for a predetermined period; and (b) sensing and processing the harmonic content of the load current and determining the existence of certain relationships of the “even” and “odd” harmonics. Signals, including alarms, indicative of excessive conditions are produced. The system may also include circuitry for sensing the load current level and generating a signal alarm if the load level is above a giver) value when the harmonics and the DC current have values in excess of certain predetermined values.

摘要翻译： 远离电力变压器的保护系统，其中性线连接到地面，由于电磁干扰，大电流可能在中性线中流动。 该系统包括用于以下步骤的电路：（a）感测中性线中的电流电平以及它是否在预定时间段内超过预定阈值; 和（b）感测和处理负载电流的谐波含量并确定“偶数”和“奇数”谐波的某些关系的存在。 产生指示过度状况的信号，包括报警。 当谐波和DC电流具有超过某些预定值的值时，该系统还可以包括用于感测负载电流水平并且如果负载水平高于发生器值则产生信号报警的电路。

公开(公告)号：US09018962B2

公开(公告)日：2015-04-28

申请号：US13736927

申请日：2013-01-08

申请人： Gary R. Hoffman ,  Edward S. Kwon ,  Hong Cai

发明人： Gary R. Hoffman ,  Edward S. Kwon ,  Hong Cai

IPC分类号： G01R31/06 ,  G01R31/02 ,  G01R31/12 ,  H02H7/04 ,  H02H3/093 ,  H02H3/52

CPC分类号： G01R31/027 ,  G01R31/1227 ,  H02H3/093 ,  H02H3/52 ,  H02H5/005 ,  H02H7/04 ,  H02H7/0455

摘要： A protective system far a power transformer having a neutral line connected to ground where large currents can flow in the neutral line due to electro-magnetic disturbances. The system includes circuitry for: (a) sensing the current level in the neutral line and whether it exceeds a predetermined threshold for a predetermined period; and (b) sensing and processing the harmonic content of the load current and determining the existence of certain relationships of the “even” and “odd” harmonics. Signals, including alarms, indicative of excessive conditions are produced. The system may also include circuitry for sensing the load current level and generating a signal alarm if the load level is above a given value when the harmonics and the DC current have values in excess of certain predetermined values.

摘要翻译： 远离电力变压器的保护系统，其中性线连接到地面，由于电磁干扰，大电流可能在中性线中流动。 该系统包括用于以下步骤的电路：（a）感测中性线中的电流电平以及它是否在预定时间段内超过预定阈值; 和（b）感测和处理负载电流的谐波含量并确定“偶数”和“奇数”谐波的某些关系的存在。 产生指示过度状况的信号，包括报警。 如果谐波和DC电流的值超过某些预定值，则系统还可以包括用于感测负载电流电平和产生信号报警的电路，如果负载电平高于给定值。