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公开(公告)号：US08730633B2
公开(公告)日：2014-05-20
申请号：US13477392
申请日：2012-05-22
IPC分类号： B64D31/00
摘要： The present disclosure is directed towards a method for protecting a multi-phase autotransformer for an aircraft including the steps of receiving values of current input into and output from the first and second phases; determining, as a function of these received values, values of current representative of the operation of the phases; determining, as a function of these determined values, a value representative of a homopolar current flowing in the first phase; comparing, in a first comparison, the value representative of the homopolar current flowing in the first phase with a first predetermined threshold value; and controlling the values of current input into the phases as a function of the first comparison.
摘要翻译： 本公开涉及一种用于保护用于飞行器的多相自耦变压器的方法，包括以下步骤：接收输入到第一和第二相中并从其输出的电流值; 根据这些接收的值确定代表相的操作的电流的值; 根据这些确定的值确定代表在第一阶段中流动的单极电流的值; 在第一比较中，比较表示在第一相中流动的单极电流与第一预定阈值的值; 以及作为第一比较的函数来控制输入到相中的电流的值。
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公开(公告)号：US20130057059A1
公开(公告)日：2013-03-07
申请号：US13477392
申请日：2012-05-22
IPC分类号： B64D31/00
摘要： The invention relates to a method for protecting a multi-phase autotransformer for an aircraft, including the steps of receiving (100) values of current input into and output from (IA, IB, Ia, Ib) the first and second phases; determining (101), as a function of these received values, values of current representative of the operation (IFa, IFb) of these phases; determining (102), as a function of these determined values, a value representative of the homopolar current (Idet-a) flowing in the first phase; comparing this value of homopolar current with a first predetermined threshold value (D2); controlling (113) the values of current input into (IA, IB) the phases as a function of the said first comparison.
摘要翻译： 本发明涉及一种用于保护用于飞行器的多相自耦变压器的方法，包括以下步骤：接收（100）当前输入到第一和第二相（IA，IB，Ia，Ib）并从其输出的值（100）。 根据这些接收值确定（101）代表这些阶段的操作（IFa，IFb）的电流值; 根据这些确定值确定（102）表示在第一阶段中流动的单极电流（Idet-a）的值; 将该单极电流的值与第一预定阈值（D2）进行比较; 控制（113）作为所述第一比较的函数的输入到（IA，IB）相的电流值。
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3.发明授权Method and device for fault detection in an N-winding three-phase power transformer 有权N绕组三相电力变压器故障检测方法及装置公开(公告)号：US07873496B2
公开(公告)日：2011-01-18
申请号：US11629775
申请日：2006-08-24
申请人： Zoran Gajic
发明人： Zoran Gajic
IPC分类号： G06F19/00
摘要： A method and a device for fault detection in an n-winding, three-phase power transformer. For each of the windings (Wi) the three phase currents (IL1—Wi; IL2—Wi; IL3—Wi) are measured. For each of the windings (Wi) deciding if a zero sequence current (I0—Wi) reduction is to be performed depending on at least one user setting (kWi) and if so, deducting the zero sequence current (I0—Wi) from each of the three phase currents (IL1—Wi; IL2—Wi; IL3—Wi). For each of the windings (Wi) generating normalized currents by performing a magnitude compensation and a phase angle shift compensation on the results of the previous step. For each of the three phases (Lx) comparing the normalized current of a single winding with the normalized currents of all other windings. For each phase (Lx) generating a fault signal, if a difference between the single winding (W1) and all other windings (W2, . . . , Wn) exceeds a predefined level.
摘要翻译： 一种用于n绕组三相电力变压器故障检测的方法和装置。 对于每个绕组（Wi），测量三相电流（IL1-Wi; IL2-Wi; IL3-Wi）。 对于每个绕组（Wi），决定是否根据至少一个用户设置（kWi）执行零序电流（I0-Wi）减小，并且如果是，则从每一个减去零序电流（I0-Wi） 的三相电流（IL1-Wi; IL2-Wi; IL3-Wi）。 对于通过对前一步骤的结果执行幅度补偿和相位角偏移补偿来产生归一化电流的每个绕组（Wi）。 将单个绕组的归一化电流与所有其他绕组的归一化电流进行比较的三相（Lx）中的每一个相位。 对于产生故障信号的每个相位（Lx），如果单绕组（W1）与所有其它绕组（W2，...，Wn）之间的差超过预定义的电平。
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公开(公告)号：US20040021995A1
公开(公告)日：2004-02-05
申请号：US10213037
申请日：2002-08-05
IPC分类号： H02H003/00
摘要： The fault detection system includes at least one valid zero sequence voltage source, either from a local relay or a remote relay on a protected line. Zero sequence current is selected between total (vector sum from both ends of the protected line) measured zero sequence current or calculated zero sequence current. A zero sequence impedance-based calculation is then made and the result is compared against a threshold value to produce a trip decision. The trip decision is then applied through a normal tripping circuit or a slow tripping circuit, depending upon selected circuit conditions, involving the local and remote ends of the line.
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公开(公告)号：US4110808A
公开(公告)日：1978-08-29
申请号：US830265
申请日：1977-09-02
IPC分类号： H02H3/28
CPC分类号： H02H3/286
摘要： Various embodiments of a ground fault protection system are disclosed for protecting a multiple source distribution network consisting of at least two sources having their neutral points interconnected by main neutral and tie neutral bus and also typically by separate ground connections. The system operates to selectively trip a ground fault circuit interrupter by distinguishing between normal neutral loading regardless of the routes taken by neutral currents in returning to the sources and a ground fault regardless of the routes taken by ground fault currents in returning to the source feeding the fault.
摘要翻译： 公开了接地故障保护系统的各种实施例，用于保护由至少两个源组成的多源分配网络，其中性点的中性点通过主中性线和中性母线互连，并且还通常通过单独的接地连接。 该系统通过区分正常中性负载来选择性地跳闸接地故障电路断路器，而不管返回到源极的中性点电流所采用的路由以及接地故障，而不管接地故障电流在返回馈电源时所采用的路由。 故障。
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公开(公告)号：US1906468A
公开(公告)日：1933-05-02
申请号：US59799732
申请日：1932-03-10
发明人： JULIUS JONAS
IPC分类号： H02H3/28
CPC分类号： H02H3/286
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公开(公告)号：US07903381B2
公开(公告)日：2011-03-08
申请号：US12046250
申请日：2008-03-11
IPC分类号： H02H3/00
摘要： A negative sequence differential element may detect a fault in an electrical power system by computing a differential between negative sequence values derived from a first phase-current measurement and a second phase-current measurement. A transformer may be disposed between the first phase-current and second phase-current measurement location. The first phase-current measurement and the second phase-current measurement may be normalized and a negative sequence current may be calculated therefrom. The negative sequence currents may be used to calculate an operating quantity, which may be an absolute value of the sum of the first and second negative sequence currents, and a restraint quantity comprising a maximum of the first and second negative sequence currents. The restraint quantity may be scaled by a slope factor. A fault may be detected if the operating quantity exceeds the scaled restraint quantity and a pickup current threshold.
摘要翻译： 负序差分元件可以通过计算从第一相电流测量导出的负序值与第二相电流测量之间的差分来检测电力系统中的故障。 变压器可以设置在第一相电流和第二相电流测量位置之间。 可以对第一相电流测量和第二相电流测量进行归一化，并且可以从其计算负序电流。 负序电流可以用于计算操作量，其可以是第一和第二负序电流的和的绝对值，以及包括第一和第二负序电流的最大值的约束量。 约束量可以通过斜率因子来缩放。 如果操作量超过标定的限制量和拾取电流阈值，则可能会检测到故障。
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8.发明授权Apparatus and method for providing differential protection for a phase angle regulating transformer in a power system 有权在电力系统中为相位角调节变压器提供差动保护的装置和方法公开(公告)号：US07319576B2
公开(公告)日：2008-01-15
申请号：US11208272
申请日：2005-08-18
申请人： Michael J. Thompson
发明人： Michael J. Thompson
IPC分类号： H02H3/00
摘要： Provided is an apparatus and method for providing differential protection for a phase angle regulating transformer having a load side and a source side in a three-phase power system. The method includes calculating a first positive sequence component and a first negative sequence component associated with incoming secondary currents detected on the source side, calculating a second positive sequence component and a second negative sequence component associated with outgoing secondary currents detected on the load side, applying a phase angle shift to the second positive sequence component and the second negative sequence component to form a compensated positive sequence component and a compensated negative sequence component, respectively, and determining an operate current value and a restraint current value for each of a positive and negative sequence differential element of the differential protection based on the compensated positive sequence component and the compensated negative sequence component.
摘要翻译： 提供了一种用于在三相电力系统中具有负载侧和源极侧的相位角调节变压器提供差动保护的装置和方法。 该方法包括计算与在源侧检测到的输入次级电流相关联的第一正序分量和第一负序分量，计算与在负载侧检测到的输出次级电流相关联的第二正序分量和第二负序分量，应用 相位角移位到第二正序分量和第二负序分量，以分别形成补偿的正序分量和补偿的负序分量，并且确定正和负的每一个的工作电流值和约束电流值 基于补偿的正序分量和补偿的负序分量的差分保护的序列差分元件。
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公开(公告)号：US06922318B2
公开(公告)日：2005-07-26
申请号：US10238725
申请日：2002-09-11
申请人： Tadashi Matsumoto , Mitsuru Mitani , Toshio Nomura
发明人： Tadashi Matsumoto , Mitsuru Mitani , Toshio Nomura
CPC分类号： H02H3/286
摘要： A ground relay system is provided which includes: first current transformers located in the respective phases of a sending end of a high-voltage distribution provided from a distribution substation; over-current relays connected to the first transformers; distribution transformers located in the respective phases in the respective sections of the distribution; second current transformers connected to secondary sides of the distribution transformers; current converters connected to the second transformers; and a current comparator that introduces the currents of the respective phases of the sending end of the distribution from the relays to produce a first zero-phase current, introduces the currents of the respective phases of a load end of the high-voltage distribution from the current converters to produce a second zero-phase current, and operates a ground protection relay that opens a circuit breaker inserted at the sending end of the high-voltage distribution if the level of the first current is larger.
摘要翻译： 提供了一种地面继电器系统，其包括：位于从分配变电站提供的高压分布的发送端的各个相位中的第一电流互感器; 连接到第一变压器的过电流继电器; 配电变压器位于分配各部分的各个阶段; 连接到配电变压器二次侧的第二电流互感器; 连接到第二变压器的电流转换器; 以及电流比较器，其将来自继电器的发射端的各相的电流引入以产生第一零相电流，将来自高压分布的负载端的各相的电流从 电流转换器产生第二零相电流，并且操作接地保护继电器，其在第一电流的电平较大时打开插入在高压分布的发送端的断路器。
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公开(公告)号：US06504693B1
公开(公告)日：2003-01-07
申请号：US09514035
申请日：2000-02-25
IPC分类号： H02H300
摘要： A network protector relay for a circuit breaker includes a microcontroller routine which provides a positive sequence network voltage from polyphase network voltages on a network bus. Another microcontroller routine provides a positive sequence phasing voltage from the polyphase network voltages on the network bus and polyphase feeder voltages on a feeder bus. A recloser circuit automatically recloses the circuit breaker connected between the polyphase feeder bus and the polyphase network bus in response to a function of a plurality of setpoints and the positive sequence phasing voltage which indicates a first flow of power from the polyphase feeder bus to the polyphase network bus. A receiver receives a remote close command. Another routine temporarily changes at least one of the setpoints in response to the received close command, in order to conditionally close the circuit breaker for a second flow of power from the polyphase feeder bus to the polyphase network bus, with the second flow of power being less than the first flow of power.
摘要翻译： 用于断路器的网络保护器继电器包括微控制器程序，其在网络总线上从多相网络电压提供正序列网络电压。 另一个微控制器程序从网络总线上的多相网络电压和馈线总线上的多相馈线电压提供正序相位电压。 重合器电路响应于多个设定点的功能和正序列相位电压自动重新连接连接在多相馈线总线和多相网络总线之间的断路器，该正序列相位电压指示从多相馈线总线到多相的第一次功率流 网络总线 接收器接收远程关闭命令。 另一个例程响应于接收到的关闭命令暂时改变设定值中的至少一个，以便有条件地关闭断路器用于从多相馈线总线到多相网络总线的第二次功率流，其中第二次功率为 小于第一流动力。
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