公开(公告)号：WO1996013730A1

公开(公告)日：1996-05-09

申请号：PCT/US1995013959

申请日：1995-10-31

Applicant: ABB POWER T & D COMPANY INC.

Inventor： ABB POWER T & D COMPANY INC. ,  NASRALLAH, Chaoukat, N.

IPC: G01R31/00

CPC classification number: G01R31/1209 ,  H02H1/0023

Abstract: An apparatus for detecting a partial discharge in a high voltage transformer comprising a live tank (100) comprises a metal box (200) detachably connected to the tank (100); a first acoustic sensor (210) inside the box for converting acoustic waves in a first frequency band to a first electrical output signal; signal conditioning circuitry (216) inside the box for amplifying and filtering the first electrical signal; an electrical to optical converter (222), inside the box, for converting the amplified and filtered electrical signal to an optical signal; a fiber optic link (300) for carrying the optical signal to a location remote from the transformer; and an optical to electrical converter (402) at the remote location for converting the optical signal to a second electrical signal, the second electrical signal being indicative of a partial discharge inside the tank (100). The second electrical signal may be fed to an oscilloscope (500) or recording equipment (600) for determination of the occurrence of a partial discharge.

Abstract translation: 一种用于检测包括活箱（100）的高压变压器中的局部放电的装置，包括可拆卸地连接到所述罐（100）的金属盒（200）。 盒内部的第一声传感器（210），用于将第一频带中的声波转换成第一电输出信号; 用于放大和滤波第一电信号的箱内的信号调节电路（216）; 在盒内部的电 - 光转换器（222），用于将放大和滤波的电信号转换成光信号; 用于将光信号传送到远离变压器的位置的光纤链路（300）; 以及在所述远程位置处的用于将所述光信号转换为第二电信号的光电转换器（402），所述第二电信号指示所述罐（100）内部的局部放电。 第二电信号可以被馈送到示波器（500）或记录设备（600），用于确定局部放电的发生。

公开(公告)号：WO1995024014A2

公开(公告)日：1995-09-08

申请号：PCT/US1995002802

申请日：1995-02-28

Applicant: ABB POWER T & D COMPANY INC.

Inventor： ABB POWER T & D COMPANY INC. ,  NOVOSEL, Damir ,  PHADKE, Arun, G.

IPC: G06K00/00

CPC classification number: H02H3/402 ,  G01R31/088

Abstract: A one-terminal process for locating a fault associated with a multi-phase electric power transmission system is disclosed. The process is based on the principle that the current in a fault sequence can be determined by a distribution factor in positive or negative sequence, i.e., it is only ncessary to determine the positive or negative sequence current in the fault. The fault may be a phase-to-ground fault, a phase-to-phase-to-ground fault, a phase-to-phase fault, or a phase-to-phase-to-phase fault. The process begins by obtaining data from one end of a transmission line. If the data is oscillographic data, phasors are calculated. If the measured data is in phasor form, or after phasors have been calculated, the fault type is determined. Thereafter, a decision is made whether the pre-fault data is sound. If the pre-fault data is sound, an appropriate equation is selected for the calculation of the fault location parameter "m". If the pre-fault data is not sound, a decision is made whether the phase is a three-phase fault. If so, a classical reactance formula is employed to compensate for the fault through a resistance by measuring only the imaginary part of the apparent line impedance. If the fault is not a three-phase fault, the reactance formula is not employed and the appropriate equation is selected for the calculation of the fault location parameter. Accurate fault location techniques for radial lines and long lines are also disclosed. The system is insensitive to the zero sequence current distribution factor. No information about the system source impedances is required.

Abstract translation: 公开了一种用于定位与多相电力传输系统相关的故障的单端过程。 该过程基于以下原理：故障序列中的电流可以由正或负序列中的分布因子确定，即仅确定故障中的正序或负序电流是唯一的。 故障可能是相对地故障，相间接地故障，相间故障或相间故障。 该过程通过从传输线的一端获取数据开始。 如果数据是示波数据，则计算相量。 如果测量数据是相量形式，或者在相量计算之后，则确定故障类型。 此后，判断故障前数据是否正确。 如果故障前数据是声音，则选择适当的方程来计算故障定位参数“m”。 如果故障前数据不正确，则确定相位是否为三相故障。 如果是这样，则采用经典电抗公式通过仅测量视在线阻抗的虚部来通过电阻来补偿故障。 如果故障不是三相故障，则不采用电抗公式，并选择适当的方程来计算故障定位参数。 还公开了用于径向线和长线的精确故障定位技术。 该系统对零序电流分布因子不敏感。 不需要有关系统源阻抗的信息。

公开(公告)号：WO1995007777A1

公开(公告)日：1995-03-23

申请号：PCT/US1994009710

申请日：1994-08-31

Applicant: ABB POWER T & D COMPANY INC.

Inventor： ABB POWER T & D COMPANY INC. ,  LINSENBARDT, Thomas, L. ,  HICKMAN, Daniel, H.

IPC: B21C35/02

CPC classification number: B21C23/06 ,  B21C23/005 ,  B21C25/00 ,  B21C35/00 ,  B21C35/02 ,  B21C37/02 ,  B21C37/04

Abstract: Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotary wheel (43), and are advanced to a die (21) which has a die opening with a circumferentially discontinuous, annular cross section. The metal merges in the die opening and exits therefrom in the form of a slit tube (34, 36). The tube is advanced over a forming member (38) to form a flat strip (39). As the tube is advanced over the forming member, an alignment system (300) maintains the tube in a centred position. The alignment system includes a light source (302a, b) disposed within the tube and two arrays of photo-transistors (308) arranged to receive light from the light source, the amount of light sensed by each array being a function of the position of the slit in the tube relative to a desired position. Any difference results in a steering roll (318) in contact with the outer surface of the tube pivoting in a direction which will bring the tube back into alignment.

Abstract translation: 双金属坯料（31）被供给到形成在旋转轮（43）中的双周向槽（44），并且前进到具有周向不连续的环形横截面的模具开口的模具（21）。 该金属在模具开口中合并，并以狭缝管（34,36）的形式离开。 管在成形构件（38）上前进以形成扁平条（39）。 当管在成形构件上前进时，对准系统（300）将管保持在居中位置。 对准系统包括设置在管内的光源（302a，b）和布置成接收来自光源的光的两个光电晶体管阵列（308），每个阵列感测的光量是位置的函数 管中的狭缝相对于期望的位置。 任何差异导致转向辊（318）与管的外表面接触，该转向辊在使管回到对准的方向上枢转。

公开(公告)号：WO1993009889A1

公开(公告)日：1993-05-27

申请号：PCT/US1992009801

申请日：1992-11-09

Applicant: ABB POWER T & D COMPANY INC.

Inventor： ABB POWER T & D COMPANY INC. ,  BUCKLEY, Richard, D. ,  LINSENBARDT, Thomas, L. ,  YOUNGER, Harold ,  HARRIS, Darrell, D. ,  STRUEMPH, Dennis, J.

IPC: B21C23/06

CPC classification number: B21C25/00 ,  B21C23/005 ,  B21C23/06 ,  B21C35/00 ,  B21C37/04

Abstract: Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotating wheel (43). The billets are advanced first to a edge-shaped gap which deforms the billets and are then advanced to a die (63). The die has a die opening with a circumferentially discontinuous, annular cross section. The metal from each billet merges in the die opening and exits therefrom in the form of a slit tube (34). The tube is then opened and flattened to form a flat strip (39) by advancing the slit tube over a forming member (38) having a progressively increasing width.

Abstract translation: 双金属坯料（31）被供给到形成在旋转轮（43）中的双周向槽（44）。 钢坯首先先进到边缘形间隙，该边缘形状使钢坯变形，然后前进到模具（63）。 模具具有具有周向不连续的环形横截面的模具开口。 来自每个坯料的金属在模具开口中合并并且以狭缝管（34）的形式离开。 然后通过使狭缝管前进到具有逐渐增加的宽度的成形构件（38）上，将管打开并变平以形成扁平条（39）。