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公开(公告)号：US20110063761A1
公开(公告)日：2011-03-17
申请号：US12561962
申请日：2009-09-17
IPC分类号： H02H7/04
CPC分类号： H02H7/045
摘要： Transformer differential protection is provided by measuring a plurality of currents corresponding to a first set of windings and a second set of windings of a transformer, and compensating the currents based on their respective flows through either the first set of windings or the second set of windings. The compensated currents may be intentionally augmented to compensate for magnetizing inrush and/or stationary overexcitation conditions associated with the transformer. Augmentation based on stationary overexcitation, for example, may be based on either harmonic restraint or an addition of a V/Hz ratio to a restraining signal. A complex current ratio is calculated corresponding to the plurality of compensated currents. The complex current ratio may be based on a two-terminal equivalent power apparatus. Then, an alpha plane analysis is applied to the complex current ratio. Based on the alpha plane analysis, a power apparatus that includes the transformer is selectively tripped.
摘要翻译： 通过测量对应于变压器的第一组绕组和第二组绕组的多个电流来提供变压器差动保护，并且基于通过第一组绕组或第二组绕组的相应流量来补偿电流 。 可以有意地增加补偿电流以补偿与变压器相关联的磁化浪涌和/或稳定的过激励条件。 例如，基于静止过激励的增强可以基于谐波抑制或者与限制信号相加的V / Hz比。 对应于多个补偿电流计算复电流比。 复电流比可以基于两端等效电力装置。 然后，将α平面分析应用于复电流比。 基于α平面分析，包括变压器的电力设备被选择性跳闸。
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2.发明申请公开(公告)号：US20100194324A1
公开(公告)日：2010-08-05
申请号：US12365118
申请日：2009-02-03
IPC分类号： H02H7/08
CPC分类号： G01R31/34 , G01R31/025 , G01R31/346
摘要： A system and method are provided for correction of parameters used in determination of stator turn faults of an induction motor. An embodiment may include determining a residual impedance and/or a residual voltage of the motor, and correcting a normalized cross-coupled impedance based on the residual impedance and residual voltage. Additional embodiments may include measuring an operating temperature of the motor and determining a negative sequence impedance of the motor based on the temperature. Another embodiment may include measuring voltages and currents of the motor and determining phasors for the voltages and currents using compensation for variations from a nominal frequency of the motor.
摘要翻译： 提供了用于校正用于确定感应电动机的定子匝故障的参数的系统和方法。 实施例可以包括确定电动机的残余阻抗和/或剩余电压，以及基于残余阻抗和残余电压校正归一化的交叉耦合阻抗。 另外的实施例可以包括测量电动机的工作温度并基于温度确定电动机的负序阻抗。 另一个实施例可以包括测量电动机的电压和电流，并且使用对来自电动机的额定频率的变化的补偿来确定电压和电流的相量。
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公开(公告)号：US07472026B2
公开(公告)日：2008-12-30
申请号：US11615103
申请日：2006-12-22
CPC分类号： G01R31/086 , G01R27/18 , Y02E60/728 , Y04S10/265 , Y04S10/522
摘要： A system and method for locating faults on multi-terminal power system transmission lines uses synchronized phasor measurements to accurately determine fault location and fault impedance regardless of fault type, fault resistance, and coupling to other adjacent power system transmission lines.
摘要翻译： 用于定位多终端电力系统传输线路故障的系统和方法使用同步相量测量来精确地确定故障位置和故障阻抗，而不管故障类型，故障电阻以及与其他相邻电力系统传输线的耦合。
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4.发明申请LINE CURRENT DIFFERENTIAL PROTECTION UPON LOSS OF AN EXTERNAL TIME REFERENCE 有权对外部时间参考的损失进行线路电流差分保护公开(公告)号：US20120162843A1
公开(公告)日：2012-06-28
申请号：US13411780
申请日：2012-03-05
IPC分类号： H02H9/02
CPC分类号： H02H3/30 , H02H1/0061 , H04J3/0667
摘要： A line current differential protection system that uses an external time reference continues providing protection to a power apparatus upon the loss of the external time reference. An external time reference synchronization mode and a channel based synchronization mode may be selectively applied on a per channel basis such that only those channels in the system that are not guaranteed to stay symmetrical use external time reference synchronization. When the external time reference is lost, fallback strategies may be used such as disabling or de-sensitizing the line current differential protection function, switching from the external time reference synchronization mode to a channel based synchronization mode with appropriately selected protection settings, and/or marking the channel as unavailable to isolate the system from the consequences of synchronization errors over this channel and instead using a master-slave mode with other available channels to continue providing line protection with the current differential system.
摘要翻译： 使用外部时间基准的线路电流差动保护系统在损失外部时间基准时继续为电力设备提供保护。 可以在每个通道的基础上选择性地应用外部时间基准同步模式和基于信道的同步模式，使得只有系统中不能保持对称的那些通道使用外部时间基准同步。 当外部时间基准丢失时，可以使用回退策略，诸如禁用或去敏感线路电流差动保护功能，从外部时间基准同步模式切换到具有适当选择的保护设置的基于频道的同步模式，和/或 将通道标记为不可用，以将系统与该通道的同步错误的后果隔离开来，而不是使用具有其他可用通道的主从模式继续使用当前差分系统提供线路保护。
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公开(公告)号：US08135551B2
公开(公告)日：2012-03-13
申请号：US12365114
申请日：2009-02-03
申请人： Arvind Kumar Tiwari , William James Premerlani , Somakumar Ramachandrapanicker , Bhaskar Sen , Bogdan Z. Kasztenny , Arijit Banerjee
发明人： Arvind Kumar Tiwari , William James Premerlani , Somakumar Ramachandrapanicker , Bhaskar Sen , Bogdan Z. Kasztenny , Arijit Banerjee
IPC分类号： G01R31/00
CPC分类号： G01R31/343
摘要： A system and method for identifying turn faults in a stator of a motor are provided. The method includes determining a normalized cross-coupled impedance from the symmetrical components of measured voltages and currents of the motor. Additionally, the normalized cross-coupled impedance may be normalized to a negative sequence impedance. The negative sequence impedance may be determined through a regression analysis using parameters of the motor, such as line-to-line voltage, horsepower, and number of poles. A system is provided that includes a device having a memory and processor configured to determine a normalized cross-coupled impedance, compare the normalized cross-coupled impedance to one or more thresholds, and trigger and alarm and/or trip the motor.
摘要翻译： 提供了一种用于识别电动机定子中的匝故障的系统和方法。 该方法包括根据测量的电压和电流的电流的对称分量来确定归一化的交叉耦合阻抗。 此外，标准化的交叉耦合阻抗可以归一化为负序阻抗。 负序阻抗可以通过使用马达参数的回归分析来确定，例如线对线电压，马力和极数。 提供了一种系统，其包括具有存储器和处理器的设备，其被配置为确定归一化的交叉耦合阻抗，将标准化的交叉耦合阻抗与一个或多个阈值进行比较，并触发和报警和/或跳闸电动机。
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6.发明申请LINE CURRENT DIFFERENTIAL PROTECTION UPON LOSS OF AN EXTERNAL TIME REFERENCE 有权对外部时间参考的损失进行线路电流差分保护公开(公告)号：US20110063766A1
公开(公告)日：2011-03-17
申请号：US12561979
申请日：2009-09-17
CPC分类号： H02H3/30 , H02H1/0061 , H04J3/0667
摘要： A line current differential protection system that uses an external time reference continues providing protection to a power apparatus upon the loss of the external time reference. An external time reference synchronization mode and a channel based synchronization mode may be selectively applied on a per channel basis such that only those channels in the system that are not guaranteed to stay symmetrical use external time reference synchronization. When the external time reference is lost, fallback strategies may be used such as disabling or de-sensitizing the line current differential protection function, switching from the external time reference synchronization mode to a channel based synchronization mode with appropriately selected protection settings, and/or marking the channel as unavailable to isolate the system from the consequences of synchronization errors over this channel and instead using a master-slave mode with other available channels to continue providing line protection with the current differential system.
摘要翻译： 使用外部时间基准的线路电流差动保护系统在损失外部时间基准时继续为电力设备提供保护。 可以在每个通道的基础上选择性地应用外部时间基准同步模式和基于信道的同步模式，使得只有系统中不能保持对称的那些通道使用外部时间基准同步。 当外部时间基准丢失时，可以使用回退策略，诸如禁用或去敏感线路电流差动保护功能，从外部时间基准同步模式切换到具有适当选择的保护设置的基于频道的同步模式，和/或 将通道标记为不可用，以将系统与该通道的同步错误的后果隔离开来，而不是使用具有其他可用通道的主从模式继续使用当前差分系统提供线路保护。
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7.发明授权Protection and control system for electric power networks with signal and command interfaces at the primary equipment 有权在主要设备上具有信号和指令接口的电力网络保护和控制系统公开(公告)号：US07693607B2
公开(公告)日：2010-04-06
申请号：US11470867
申请日：2006-09-07
IPC分类号： H02J13/00
CPC分类号： H02J13/0065 , H02H3/05 , Y02E60/723 , Y02E60/724 , Y02E60/725 , Y02E60/74 , Y04S10/16 , Y04S10/18 , Y04S10/20 , Y04S10/30
摘要： A system for protection, control, metering, and monitoring of the delivery of electrical power is disclosed. Embodiments of the system provide input/output devices called bricks to receive analog and binary field data from primary equipment located in a power substation switchyard. The bricks are linked via fiber-optic patch cables and patch panels with one or more intelligent electronic devices (“IEDs”). In operation, the bricks convert the received binary and/or analog field data into digital signals, and transmit the digital signals synchronously to their associated IEDs using clock signals provided by each IED to the individual bricks. The bricks may accept a computer software code download from each of its master IED(s). Multiple code implementations, each tailored to the requirements of its master IED(s) can therefore co-exist on a single brick.
摘要翻译： 公开了一种用于保护，控制，计量和监测电力输送的系统。 该系统的实施例提供了被称为砖块的输入/输出装置，以从位于变电站开关站中的主要设备接收模拟和二进制现场数据。 砖通过具有一个或多个智能电子设备（“IED”）的光纤跳线和接线板连接。 在操作中，砖将接收到的二进制和/或模拟场数据转换为数字信号，并使用由每个IED提供的时钟信号将数字信号与其相关联的IED同步发送到各个砖。 这些砖块可以接受每个主IED的计算机软件代码下载。 因此，可以在单个砖上共存多个代码实现，每个代码实现与其主IED的要求相一致。
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8.发明授权Self-adjusting voltage filtering technique compensating for dynamic errors of capacitive voltage transformers 有权自适应电压滤波技术补偿电容式电压互感器的动态误差公开(公告)号：US07567881B2
公开(公告)日：2009-07-28
申请号：US11694588
申请日：2007-03-30
IPC分类号： G01R35/00
CPC分类号： H03H17/04 , G01R15/16 , H03H2017/0477
摘要： A method of digitally correcting the raw output voltage from a Capacitive Voltage Transformer (CVT) with the intent to remove transient components impacting on transient accuracy of protection function. A typical CVT is represented using three parameters in the linear CVT model. A digital filter designed based on the three parameters and incorporating a dedicated mechanism to ensure numerical stability of the former. A method of self-adjusting the said filter based on system events and performed after the method has been deployed in the field and supplied from a specific CVT.
摘要翻译： 一种从电容式电压互感器（CVT）数字校正原始输出电压的方法，旨在消除影响保护功能的瞬态精度的瞬态分量。 典型的CVT用线性CVT模型中的三个参数表示。 基于三个参数设计的数字滤波器，并结合了专门的机构来确保前者的数值稳定性。 一种基于系统事件自动调整所述过滤器的方法，并且在所述方法已被部署在现场并从特定CVT提供之后执行。
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公开(公告)号：US08565229B2
公开(公告)日：2013-10-22
申请号：US12818410
申请日：2010-06-18
申请人： Bogdan Z. Kasztenny
发明人： Bogdan Z. Kasztenny
IPC分类号： H04L1/00
CPC分类号： H04L1/0061 , H04L1/1803 , H04L63/123 , H04L69/324 , H04L69/326 , Y04S40/24
摘要： The present disclosure relates to the transmission of data packets, and to systems and methods for improving the utilization of available bandwidth. In various embodiments, a transmitting device may calculate a first data integrity value based on the payload of a network packet and a static datum (e.g., sender identification information). The first data integrity value is transmitted with the network packet while the static datum is omitted. A receiving device may be configured to replace the omitted static datum upon receipt of the network packet. This static data is pre-configured in the receiving device or communicated using an alternative method. The receiving device may then calculate a second data integrity value based on the received network packet payload and the static datum. The second data integrity value may only match the first data integrity value if the transmitting device and receiving device use the same static datum.
摘要翻译： 本公开涉及数据分组的传输，以及用于提高可用带宽的利用的系统和方法。 在各种实施例中，发送设备可以基于网络分组的有效载荷和静态数据（例如，发送者识别信息）来计算第一数据完整性值。 第一个数据完整性值与网络数据包一起传输，而静态数据被省略。 接收设备可以被配置为在接收到网络分组时替换所省略的静态数据。 该静态数据在接收设备中预先配置或使用另一种方法传送。 然后，接收设备可以基于接收到的网络分组有效载荷和静态数据来计算第二数据完整性值。 如果发送设备和接收设备使用相同的静态数据，则第二数据完整性值可能仅匹配第一数据完整性值。
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10.发明授权公开(公告)号：US08559146B2
公开(公告)日：2013-10-15
申请号：US13411780
申请日：2012-03-05
CPC分类号： H02H3/30 , H02H1/0061 , H04J3/0667
摘要： A line current differential protection system that uses an external time reference continues providing protection to a power apparatus upon the loss of the external time reference. An external time reference synchronization mode and a channel based synchronization mode may be selectively applied on a per channel basis such that only those channels in the system that are not guaranteed to stay symmetrical use external time reference synchronization. When the external time reference is lost, fallback strategies may be used such as disabling or de-sensitizing the line current differential protection function, switching from the external time reference synchronization mode to a channel based synchronization mode with appropriately selected protection settings, and/or marking the channel as unavailable to isolate the system from the consequences of synchronization errors over this channel and instead using a master-slave mode with other available channels to continue providing line protection with the current differential system.
摘要翻译： 使用外部时间基准的线路电流差动保护系统在损失外部时间基准时继续为电力设备提供保护。 可以在每个通道的基础上选择性地应用外部时间基准同步模式和基于信道的同步模式，使得只有系统中不能保持对称的那些通道使用外部时间基准同步。 当外部时间基准丢失时，可以使用回退策略，诸如禁用或去敏感线路电流差动保护功能，从外部时间基准同步模式切换到具有适当选择的保护设置的基于频道的同步模式，和/或 将通道标记为不可用，以将系统与该通道的同步错误的后果隔离开来，而不是使用具有其他可用通道的主从模式继续使用当前差分系统提供线路保护。
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