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1.发明授权Apparatus and method for identifying a faulted phase in a shunt capacitor bank 有权用于识别并联电容器组中的故障相位的装置和方法公开(公告)号：US08575941B2
公开(公告)日：2013-11-05
申请号：US12555189
申请日：2009-09-08
IPC分类号： G01R31/08
摘要： An apparatus and method is provided for identifying a faulted phase in at least one shunt capacitor bank. The apparatus generally includes a sampling circuit for sampling current or voltage signals associated with the shunt capacitor bank. A microcontroller is coupled to the sampling circuit and programmed to measure a compensated neutral point phase angle from the sampled signal, and compare the compensated neutral point phase angle with a fixed reference phase angle to identify the faulted phase of the shunt capacitor bank. The method generally includes the steps of sampling a current or voltage signal associated with the shunt capacitor bank, determining a compensated neutral point phase angle from the sampled signal, and comparing the compensated neutral point phase angle with a fixed reference phase angle to identify the faulted phase of the shunt capacitor bank. The invention also relates to an apparatus and method for identifying the location of the fault (e.g., the section of the bank) in a double ungrounded shunt capacitor bank or double WYE shunt capacitor bank.
摘要翻译： 提供一种用于识别至少一个并联电容器组中的故障相位的装置和方法。 该装置通常包括用于对与分流电容器组相关联的电流或电压信号进行采样的采样电路。 微控制器耦合到采样电路并编程为从采样信号测量补偿的中性点相位角，并将补偿的中性点相位角与固定的参考相位角进行比较，以识别并联电容器组的故障相位。 该方法通常包括对与分流电容器组相关联的电流或电压信号进行采样的步骤，从采样信号确定补偿的中性点相位角，并将补偿的中性点相位角与固定的参考相位角进行比较，以识别故障的 分流电容器组的相位。 本发明还涉及一种用于在双未接地并联电容器组或双WYE并联电容器组中识别故障（例如，存储体的部分）的位置的装置和方法。
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公开(公告)号：US08321162B2
公开(公告)日：2012-11-27
申请号：US12695778
申请日：2010-01-28
IPC分类号： G06F19/00
CPC分类号： H02J3/1878 , G01R19/2513 , H02J3/46 , H02P13/06 , Y02E40/30 , Y02E60/728 , Y04S10/265
摘要： A power system may comprise two or more transformers operating in parallel. A voltage differential may exist between the transformers, which may create a circulating current in the power system. The system voltage of the power system may be modified by performing a tap change operation on one or more of the transformers. The tap change operation may be configured to minimize the circulating current. The circulating current may be minimized by determining the bias between the transformers using an angular difference between the transformer currents. The angular difference may be calculated using time-aligned measurement data. A tap change operation configured to modify the system voltage, while minimizing circulating current, may be determined using the transformer bias.
摘要翻译： 电力系统可以包括并联操作的两个或更多个变压器。 在变压器之间可能存在电压差，这可能在电力系统中产生循环电流。 可以通过对一个或多个变压器执行抽头变换操作来修改电力系统的系统电压。 抽头变换操作可以被配置为使循环电流最小化。 可以通过使用变压器电流之间的角度差确定变压器之间的偏压来最小化循环电流。 可以使用时间对准的测量数据来计算角度差。 可以使用变压器偏压来确定在最小化循环电流的同时修改系统电压的抽头变换操作。
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3.发明申请APPARATUS AND METHOD FOR IDENTIFYING A FAULTED PHASE IN A SHUNT CAPACITOR BANK 有权用于识别交换电容器中的故障相的装置和方法公开(公告)号：US20110057661A1
公开(公告)日：2011-03-10
申请号：US12555189
申请日：2009-09-08
IPC分类号： G01R31/08
摘要： An apparatus and method is provided for identifying a faulted phase in at least one shunt capacitor bank. The apparatus generally includes a sampling circuit for sampling current or voltage signals associated with the shunt capacitor bank. A microcontroller is coupled to the sampling circuit and programmed to measure a compensated neutral point phase angle from the sampled signal, and compare the compensated neutral point phase angle with a fixed reference phase angle to identify the faulted phase of the shunt capacitor bank. The method generally includes the steps of sampling a current or voltage signal associated with the shunt capacitor bank, determining a compensated neutral point phase angle from the sampled signal, and comparing the compensated neutral point phase angle with a fixed reference phase angle to identify the faulted phase of the shunt capacitor bank. The invention also relates to an apparatus and method for identifying the location of the fault (e.g., the section of the bank) in a double ungrounded shunt capacitor bank or double WYE shunt capacitor bank.
摘要翻译： 提供一种用于识别至少一个并联电容器组中的故障相位的装置和方法。 该装置通常包括用于对与分流电容器组相关联的电流或电压信号进行采样的采样电路。 微控制器耦合到采样电路并编程为从采样信号测量补偿的中性点相位角，并将补偿的中性点相位角与固定的参考相位角进行比较，以识别并联电容器组的故障相位。 该方法通常包括对与分流电容器组相关联的电流或电压信号进行采样的步骤，从采样信号确定补偿的中性点相位角，并将补偿的中性点相位角与固定的参考相位角进行比较，以识别故障的 分流电容器组的相位。 本发明还涉及一种用于在双未接地并联电容器组或双WYE并联电容器组中识别故障（例如，存储体的部分）的位置的装置和方法。
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公开(公告)号：US20100125373A1
公开(公告)日：2010-05-20
申请号：US12695778
申请日：2010-01-28
CPC分类号： H02J3/1878 , G01R19/2513 , H02J3/46 , H02P13/06 , Y02E40/30 , Y02E60/728 , Y04S10/265
摘要： A power system may comprise two or more transformers operating in parallel. A voltage differential may exist between the transformers, which may create a circulating current in the power system. The system voltage of the power system may be modified by performing a tap change operation on one or more of the transformers. The tap change operation may be configured to minimize the circulating current. The circulating current may be minimized by determining the bias between the transformers using an angular difference between the transformer currents. The angular difference may be calculated using time-aligned measurement data. A tap change operation configured to modify the system voltage, while minimizing circulating current, may be determined using the transformer bias.
摘要翻译： 电力系统可以包括并联操作的两个或更多个变压器。 在变压器之间可能存在电压差，这可能在电力系统中产生循环电流。 可以通过对一个或多个变压器执行抽头变换操作来修改电力系统的系统电压。 抽头变换操作可以被配置为使循环电流最小化。 可以通过使用变压器电流之间的角度差确定变压器之间的偏压来最小化循环电流。 可以使用时间对准的测量数据来计算角度差。 可以使用变压器偏压来确定在最小化循环电流的同时修改系统电压的抽头变换操作。
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