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1. 发明申请

WO2011035057A3 LINE CURRENT DIFFERENTIAL PROTECTION UPON LOSS OF AN EXTERNAL TIME REFERENCE 审中-公开
标题翻译：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：WO2011035057A3
公开(公告)日：2012-04-19
申请号：PCT/US2010049168
申请日：2010-09-16
申请人： SCHWEITZER ENGINEERING LAB INC , KASZTENNY BOGDAN Z , FISCHER NORMANN , ANDERSON LUTHER S
发明人： KASZTENNY BOGDAN Z , FISCHER NORMANN , ANDERSON LUTHER S
IPC分类号： H02H3/00 , H04L7/00
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电流差分系统提供线路保护。

2. 发明申请

WO2011093952A1 MINIMIZING CIRCULATING CURRENT USING TIME-ALIGNED DATA 审中-公开
标题翻译：使用时间对齐的数据最小化循环电流
公开(公告)号：WO2011093952A1
公开(公告)日：2011-08-04
申请号：PCT/US2010/059734
申请日：2010-12-09
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , LABUSCHAGNE, Casper A. , FISCHER, Normann , SAMINENI, Satish , GUZMAN-CASILLAS, Armando
发明人： LABUSCHAGNE, Casper A. , FISCHER, Normann , SAMINENI, Satish , GUZMAN-CASILLAS, Armando
IPC分类号： G05F1/14
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。

3. 发明申请

WO2011035055A1 CHARGING CURRENT COMPENSATION FOR LINE CURRENT DIFFERENTIAL PROTECTION 审中-公开
标题翻译：针对线路电流差分保护充电电流补偿
公开(公告)号：WO2011035055A1
公开(公告)日：2011-03-24
申请号：PCT/US2010/049166
申请日：2010-09-16
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , KASZTENNY, Bogdan, Z. , FISCHER, Normann
发明人： KASZTENNY, Bogdan, Z. , FISCHER, Normann
IPC分类号： H02H3/00
CPC分类号： H02H3/28 , H02H1/04 , H02H3/006
摘要： Current differential protection with charging current compensation is provided for a power apparatus, such as a power transmission line. Individual terminals dynamically determine their respective contributions, if any, to the charging current compensation value as availability of one or more voltage sources dynamically changes within the power apparatus. Respective terminals calculate local contributions to a charging current compensation value based on local voltage measurements. A loss of a voltage source is handled by adjusting multipliers for the remaining compensation points to reflect the total charging current. A local contribution is suppressed when the local voltage source is no longer available. After applying the local contributions, an alpha plane analysis may be used to determine when to trip the power apparatus.
摘要翻译：对电力设备（如输电线路）提供带充电电流补偿的电流差动保护。如果有的话，单个终端动态地确定它们对充电电流补偿值的贡献（如果有的话），因为一个或多个电压源的可用性在电力设备内动态地改变。相应的终端根据本地电压测量计算对充电电流补偿值的局部贡献。通过调整剩余补偿点的乘数来处理电压源的损失，以反映总充电电流。当本地电压源不再可用时，局部贡献被抑制。在应用本地贡献之后，可以使用α平面分析来确定何时跳闸电力设备。

4. 发明申请

WO2011035053A1 TRANSFORMER DIFFERENTIAL PROTECTION 审中-公开
标题翻译：变压器差分保护
公开(公告)号：WO2011035053A1
公开(公告)日：2011-03-24
申请号：PCT/US2010/049162
申请日：2010-09-16
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , KASZTENNY, Bogdan, Z. , FISCHER, Normann
发明人： KASZTENNY, Bogdan, Z. , FISCHER, Normann
IPC分类号： H02H3/00
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。

5. 发明申请

WO2006130722A3 AN APPARATUS AND METHOD FOR DETERMINING A FAULTED PHASE OF A THREE-PHASE UNGROUNDED POWER SYSTEM 审中-公开
标题翻译：用于确定三相电力系统的故障相的装置和方法
公开(公告)号：WO2006130722A3
公开(公告)日：2008-09-25
申请号：PCT/US2006021162
申请日：2006-06-01
申请人： SCHWEITZER ENGINEERING LAB INC , FISCHER NORMANN
发明人： FISCHER NORMANN
IPC分类号： G01R31/08 , G01R31/00 , G01R31/14 , H02H9/08
CPC分类号： G01R31/025 , G01R29/16 , H02H3/081 , H02H3/083 , H02H3/385
摘要： Provided is an apparatus (24) and method for determining a faulted phase resulting from a fault in a three-phase ungrounded power system (10). The method includes comparing a phase angle of an operating phasor to a phase angle of a fixed reference phasor The operating phasor is derived from a digitized signal sample of a plurality of measured signals of the power system(l?) The method also includes comparing a phase angle difference between the operating phasor and the fixed reference phasor to at least one threshold to determine the faulted phase. The fixed reference phasor may be a phase-to- phase voltage or a positive sequence voltage of the plurality of measured signals of the power system (10) The operating phasor may be a zero sequence current, a zero sequence voltage or a combination of a zero sequence current and a zero sequence voltage of the plurality of measured signals of the power system(l0).
摘要翻译：提供了一种用于确定由三相非接地电力系统（10）中的故障产生的故障相位的装置（24）和方法。该方法包括将操作相量的相位角与固定参考相量的相位角进行比较。操作相量是从电力系统的多个测量信号的数字化信号样本得出的（l？）。该方法还包括比较操作相量和固定参考相量之间的相位角差至少一个阈值以确定故障相位。固定参考相量可以是电力系统（10）的多个测量信号的相间电压或正序电压。操作相量可以是零序电流，零序电压或者是电力系统（10）的多个测量信号的零序电流和零序电压。

6. 发明申请

WO2012092203A1 VALIDATION OF ELECTRIC POWER SYSTEM MONITORING SYSTEMS 审中-公开
标题翻译：电力系统监测系统的验证
公开(公告)号：WO2012092203A1
公开(公告)日：2012-07-05
申请号：PCT/US2011/067205
申请日：2011-12-23
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , WATKINS, Matthew, B. , FISCHER, Normann , PRESTWICH, David, M.
发明人： WATKINS, Matthew, B. , FISCHER, Normann , PRESTWICH, David, M.
IPC分类号： G06F17/40
CPC分类号： G01R19/2513 , G01R35/00
摘要： The present disclosure provides systems and methods for validating electric power delivery monitoring systems, including, but not limited to, current transformers (CTs) and voltage potential transformers (PTs). According to various embodiments, a first IED monitors a portion of an electric power delivery system via one or more CTs and/or PTs. A second IED monitors the portion of the electric power delivery system via one or more additional CTs and/or PTs. Each IED may generate an event report, containing measurement data, associated with each respective measurement equipment. A validation module may compare the event reports in order to validate that the lEDs and/or the underlying measurement equipment are functioning correctly. According to various embodiments, the validation module may be configured to align the event reports from two lEDs using an event trigger common to both lEDs.
摘要翻译：本公开提供用于验证电力输送监控系统的系统和方法，包括但不限于电流互感器（CT）和电压电压变压器（PT）。根据各种实施例，第一IED经由一个或多个CT和/或PT监视电力输送系统的一部分。第二个IED通过一个或多个额外的CT和/或PT监视电力输送系统的部分。每个IED可以生成与各个测量设备相关联的包含测量数据的事件报告。验证模块可以比较事件报告，以便验证lED和/或底层测量设备是否正常工作。根据各种实施例，验证模块可以被配置为使用两个lED共同的事件触发来对准来自两个lED的事件报告。

7. 发明申请

WO2011035052A1 EQUIVALENT ALPHA PLANE FAULT DETERMINATION FOR A MULTI-TERMINAL POWER APPARATUS 审中-公开
标题翻译：多终端电源设备的等效ALPHA平面故障确定
公开(公告)号：WO2011035052A1
公开(公告)日：2011-03-24
申请号：PCT/US2010/049160
申请日：2010-09-16
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , KASZTENNY, Bogdan, Z. , FISCHER, Normann
发明人： KASZTENNY, Bogdan, Z. , FISCHER, Normann
IPC分类号： G01R31/00
CPC分类号： H02H3/28
摘要： Current differential protection is provided for a multi-terminal power apparatus, such as a power transmission line. Currents measured at each of the multiple terminals are used to calculate a differential current and a restraining current, which are then converted into a first equivalent current and a second equivalent current of an equivalent two-terminal power apparatus. In the equivalent two-terminal power apparatus, a differential current derived from the first and second equivalent currents is substantially equal to the differential current of the original multi-terminal power apparatus. Similarly, a restraining current derived from the first and second equivalent currents is substantially equal to the restraining current of the original multi-terminal power apparatus. The first and second equivalent currents may be used in an alpha plane analysis to determine whether or not to trip the multi-terminal power apparatus.
摘要翻译：为诸如输电线路的多终端电力设备提供电流差动保护。使用在多个端子中的每一个测量的电流来计算差分电流和约束电流，然后将其转换为等效的两端电力设备的第一等效电流和第二等效电流。在等效的两端电力设备中，从第一和第二等效电流导出的差分电流基本上等于原始多端电力设备的差分电流。类似地，从第一和第二等效电流导出的约束电流基本上等于原始多端子功率装置的约束电流。可以在α平面分析中使用第一等效电流和第二等效电流来确定是否跳闸多端子电力设备。

8. 发明申请

WO2006130722A2 AN APPARATUS AND METHOD FOR DETERMINING A FAULTED PHASE OF A THREE-PHASE UNGROUNDED POWER SYSTEM 审中-公开
标题翻译：用于确定三相电力系统的故障相的装置和方法
公开(公告)号：WO2006130722A2
公开(公告)日：2006-12-07
申请号：PCT/US2006/021162
申请日：2006-06-01
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , FISCHER, Normann
发明人： FISCHER, Normann
CPC分类号： G01R31/025 , G01R29/16 , H02H3/081 , H02H3/083 , H02H3/385
摘要： Provided is an apparatus and method for determining a faulted phase resulting from a fault in a three-phase ungrounded power system. The method includes comparing a phase angle of an operating phasor to a phase angle of a fixed reference phasor. The operating phasor is derived from a digitized signal sample of a plurality of measured signals of the power system. The method also includes comparing a phase angle difference between the operating phasor and the fixed reference phasor to at least one threshold to determine the faulted phase. The fixed reference phasor may be a phase-to- phase voltage or a positive sequence voltage of the plurality of measured signals of the power system. The operating phasor may be a zero sequence current, a zero sequence voltage or a combination of a zero sequence current and a zero sequence voltage of the plurality of measured signals of the power system.
摘要翻译：提供了一种用于确定由三相非接地电力系统中的故障产生的故障相位的装置和方法。该方法包括将操作相量的相位角与固定参考相量的相位角进行比较。操作相量来自电力系统的多个测量信号的数字化信号样本。该方法还包括将操作相量和固定参考相量之间的相位角差与至少一个阈值进行比较以确定故障相位。固定参考相量可以是电力系统的多个测量信号的相间电压或正序电压。操作相量可以是电力系统的多个测量信号的零序电流，零序电压或零序电流和零序电压的组合。

9. 发明申请

WO2011019762A1 ELECTRIC POWER SYSTEM AUTOMATION USING TIME COORDINATED INSTRUCTIONS 审中-公开
标题翻译：电力系统自动化使用时间协调的指令
公开(公告)号：WO2011019762A1
公开(公告)日：2011-02-17
申请号：PCT/US2010/045086
申请日：2010-08-10
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , SCHWEITZER, Edmund, O., III , WHITEHEAD, David, E. , ZWEIGLE, Gregary, C. , FISCHER, Normann , MORRIS, Robert, E.
发明人： SCHWEITZER, Edmund, O., III , WHITEHEAD, David, E. , ZWEIGLE, Gregary, C. , FISCHER, Normann , MORRIS, Robert, E.
IPC分类号： H04L7/00
CPC分类号： H02J3/16 , H02J3/06 , H02J3/1821 , H02J13/0062 , Y02E40/34 , Y02E40/74 , Y02E60/724 , Y02E60/726 , Y02E60/7838 , Y04S10/18 , Y04S10/22 , Y04S10/24 , Y04S40/124 , Y10T307/469
摘要： A system for controlling and automating an electric power delivery system by executing time coordinated instruction sets to achieve a desired result. A communication master may implement the execution of time coordinated instruction sets in a variety of circumstances. The communication may be embodied as an automation controller in communication with intelligent electronic devices (IEDs). The communication master may also be embodied as an IED that is configured to coordinate the actions of other IEDs. The time coordinated instruction sets may include steps for checking status of power system equipment before executing. The time coordinated instruction sets may include reactionary steps to execute if one of the steps fails. The time coordinated instruction sets may also be implemented based on a condition detected in the electric power delivery system, or may be implemented through high level systems, such as a SCADA system or a wide area control and situational awareness system.
摘要翻译：一种用于通过执行时间协调指令集来控制和自动化电力输送系统以实现期望结果的系统。通信主人可以在各种情况下实现时间协调指令集的执行。通信可以被实现为与智能电子设备（IED）通信的自动化控制器。通信主机还可以被体现为被配置为协调其他IED的动作的IED。时间协调指令集可以包括在执行之前检查电力系统设备的状态的步骤。时间协调指令集可以包括如果其中一个步骤失败则执行的反动步骤。时间协调指令集还可以基于在电力输送系统中检测到的条件来实现，或者可以通过诸如SCADA系统或广域控制和情境感知系统的高级系统来实现。

10. 发明申请

WO2009048972A1 TRANSFORMER THROUGH-FAULT CURRENT MONITOR 审中-公开
标题翻译：变压器通过故障电流监视器
公开(公告)号：WO2009048972A1
公开(公告)日：2009-04-16
申请号：PCT/US2008/079232
申请日：2008-10-08
申请人： SCHWEITZER ENGINEERING LABORATORIES, INC. , GUZMAN-CAILLAS, Armando , FISCHER, Normann
发明人： GUZMAN-CAILLAS, Armando , FISCHER, Normann
IPC分类号： G01R31/08
CPC分类号： H02H7/045 , G01R19/0092 , G01R22/10 , G01R31/088
摘要： A device is provided for monitoring through-fault current in an electric transformer on an electrical power system. The device generally includes a magnitude calculator for calculating the magnitude of current (e.g., a root means square value of current or magnitude of a fundamental of current) based on the current through the electric transformer. A through-fault energy calculator is further provided which is coupled to the magnitude calculator for calculating a through-fault energy value based on the magnitude of current or the calculated current through the transformer. An accumulator is coupled to the through-fault energy calculator for accumulating a plurality of through-fault energy values, and an alarm coupled to the accumulator for indicating that the accumulated through-fault energy values exceed a selected threshold.
摘要翻译：提供一种用于监测电力系统中的电力变压器中的故障电流的装置。该装置通常包括用于基于通过电变压器的电流来计算电流的大小（例如，根指电流的电流的平方值或电流的基波的大小）的幅度计算器。还提供一个通过故障的能量计算器，其耦合到幅度计算器，用于基于电流的大小或通过变压器的计算的电流来计算贯穿故障能量值。累加器耦合到通过故障能量计算器以累积多个通过故障的能量值，以及耦合到累加器的用于指示累积的通过故障能量值超过所选择的阈值的警报。

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