Rotary multi-parallel rectifier bridge state detection device

Abstract

The utility model belongs to the technical field of electricians, and particularly relates to a rotary multi-parallel rectifier bridge state detection device, which comprises an arc-shaped bracket, two current detection sensors and a working power supply. The two current detection sensors are mounted on the arc-shaped bracket; and the probe end of the current detection sensor directly faces the branch of the rotary multi-parallel rectifier bridge. The current detection circuit can continuously and directly detect the current of each branch in the rotary multi-parallel rectifier bridge, can be used for analyzing and judging the state of the branch, and can timely discover abnormity, so as to take reasonable countermeasures, avoid fault expansion and guarantee the operation of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical engineering, in particular to a rotating multi-parallel rectifier bridge state detection device. Background Art

[0002] The rotating multi-parallel rectifier bridge is an important component of the brushless excitation system of the generator. It directly affects the operating characteristics and equipment safety of the synchronous generator and plays an important role in the stability of the power system. The rotating multi-parallel rectifier bridge is composed of multiple component branches. The failure of each branch is usually progressive. By detecting and monitoring the branch status of the rotating multi-parallel rectifier bridge, abnormalities can be discovered in time, and reasonable countermeasures can be taken to avoid the expansion of faults and ensure equipment operation.

[0003] Traditional detection methods usually use principles such as stroboscope detection, indicator light frequency method, and harmonic method. However, these detection methods cannot monitor continuously and require detection personnel to regularly approach the detection equipment for inspection. Whether the detection equipment is normal or not is related to the personal experience / ability of the inspection personnel. Therefore, the professional requirements for the detection personnel are relatively high. In addition, the detection equipment includes power generation equipment, which is dangerous. When the detection personnel approach, the personal safety of the detection personnel cannot be guaranteed. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems existing in the background technology, and for this purpose, a rotating multi-parallel rectifier bridge state detection device is provided.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A rotating multi-parallel rectifier bridge state detection device comprises an arc bracket and two current detection sensors; the arc bracket comprises an arc segment, the arc segment is provided with a group of arc grooves with the same circumferential center; the current detection sensor is fixedly mounted on the arc segment along the arc groove; the probe ends of the two current detection sensors face the branch of the rotating multi-parallel rectifier bridge, the two current detection sensors are respectively used to measure the forward current and reverse current of the same phase of the branch of the rotating multi-parallel rectifier bridge, and the angle between the probe ends of the two current detection sensors in the detection direction is α: α=360° / f / 2; wherein f is the frequency of the AC power supply of the rotating multi-parallel rectifier bridge.

[0007] The current detection sensor outputs the detection result waveform for online analysis. The current detection sensor consists of a magnetoelectric conversion (magnetoelectric transformation) functional unit, an isolation filter functional unit, a signal enhancement functional unit and a shell. The magnetoelectric conversion functional unit converts the sensed magnetic signal into a voltage signal of tens of millivolts. The isolation filter functional unit uses a bandpass filter circuit to extract the useful signal. The signal enhancement functional unit amplifies the voltage signal to a voltage signal of hundreds of millivolts. The shell of the current detection sensor has two fixing holes. One side of the current detection sensor is the probe end, and the other side is the outlet end.

[0008] The following is a technical solution further defined by the utility model: both current detection sensors are electrically connected to a working power supply, and the working power supply is fixedly mounted on an arc-shaped bracket. The working power supply provides power for the current detection sensor, and the working power supply is a 15V±10% DC power supply.

[0009] The following is a technical solution further defined by the utility model, wherein the bottom edge of the arc-shaped bracket is fixedly mounted on the bottom plate of the base. The cross section of the arc-shaped bracket is an inverted T-shape, the lower edge of the inverted T-shape of the arc-shaped bracket is fixedly mounted on the bottom plate of the base, and the upper edge of the inverted T-shape of the arc-shaped bracket is cut into an arc shape near the rotating multi-parallel rectifier bridge.

[0010] The following is a technical solution further defined by the present utility model: the circumferential center of the arc segment is the same as the center of the rotating shaft of the rotating multi-parallel rectifier bridge, and the circumferential center of the arc groove is the same as the center of the rotating shaft of the rotating multi-parallel rectifier bridge.

[0011] The following is a technical solution further defined by the present invention: the housing of the current detection sensor is fixedly mounted on a mounting plate, and the mounting plate is fixedly mounted on the arc segment along the arc groove by bolts. The current detection sensor can be adjusted in position along the arc groove.

[0012] The following is a technical solution further defined by the utility model, the housing of the current detection sensor is provided with a fixing hole, the fixing hole is set as a longitudinal waist hole, the housing of the current detection sensor is fixedly mounted on the mounting plate along the mounting hole on the mounting plate by bolts passing through the fixing hole. The current detection sensor can be adjusted in radial distance on the arc bracket to adjust the distance from the sensor probe end to the rotating shaft surface of the rotating multi-parallel rectifier bridge.

[0013] Compared with the prior art, the utility model has the following technical effects:

[0014] 1. The utility model adopts a fixed-point bolt fixing installation method for the current detection sensor to avoid uncertainty in the detection process; then according to the frequency of the rotating multi-parallel rectifier bridge AC power supply, loosen the bolts, adjust the detection position and angle of the current detection sensor, and be compatible with a variety of different generator rotating multi-parallel rectifier bridges;

[0015] 2. During the detection, the operator does not need to be close to the detection equipment, generator and other operating equipment, thus ensuring the personal safety of the operator;

[0016] 3. The utility model can continuously and directly detect the current of each branch in the rotating multi-parallel rectifier bridge, and can be used to analyze and judge the branch status, discover abnormalities in time, and then take reasonable countermeasures to avoid the expansion of faults and ensure equipment operation.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model in cooperation with a rotating multi-parallel rectifier bridge;

[0021] Figure 3 It is a structural schematic diagram of the current detection sensor in the utility model;

[0022] Figure 4 This is a schematic diagram of the working principle of the current detection sensor in the utility model;

[0023] Figure 5 It is a front view structural schematic diagram of the utility model;

[0024] Figure 6 It is a schematic diagram of the detection output waveform of the current detection sensor in the utility model.

[0025] Figure numerals: 1, arc-shaped bracket; 101, arc-shaped groove; 2, current detection sensor; 201, probe end; 202, outlet end; 203, fixing hole; 3, working power supply; 4, base bottom plate. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] like Figure 1-6 As shown, a rotating multi-parallel rectifier bridge state detection device is provided, comprising an arc-shaped bracket 1, two current detection sensors 2 and a working power supply 3. The two current detection sensors 2 are mounted on the arc-shaped bracket 1; the probe end 201 of the current detection sensor 2 faces the branch of the rotating multi-parallel rectifier bridge; the working power supply 3 converts a conventional industrial control power supply (such as: AC 220V, DC 110V) into a DC 15V±10% power supply and provides it to the current detection sensor 2.

[0030] like Figure 3 and 4 As shown, the current detection sensor 2 inputs an electromagnetic signal and outputs an electrical signal, which requires an external working power supply 3:

[0031] The power supply is distributed to the magnetoelectric conversion (magnetoelectric conversion) functional unit, the isolation filtering functional unit, the signal enhancement functional unit and other units, and the sensed magnetic signal is processed by magnetoelectric conversion (magnetoelectric conversion), isolation filtering, signal enhancement and other processing to output waveforms. The waveforms output by the two current detection sensors 2 are as follows: Figure 6It should be noted that the working process of the current detection sensor 2 in the present utility model in detecting current belongs to the prior art, so the current detection sensor 2 is not described in more detail in this embodiment.

[0032] The cross-section of the arc-shaped bracket 1 is an inverted T-shape, and the lower side of the inverted T-shape of the arc-shaped bracket 1 is fixedly mounted on the base bottom plate 4; the upper side of the inverted T-shape of the arc-shaped bracket 1 close to the rotating multi-parallel rectifier bridge is cut into an arc shape, wherein the arc-shaped portion is the arc segment of the arc-shaped bracket 1.

[0033] The arc segment is provided with two arc-shaped grooves 101 with the same circumferential center. Figure 2 As shown, the circumferential center of the arc segment is the same as the center of the rotating shaft of the rotating multi-parallel rectifier bridge, and the circumferential center of the arc slot 101 is the same as the center of the rotating shaft of the rotating multi-parallel rectifier bridge.

[0034] The two current detection sensors 2 are fixedly mounted on the arc segment along the arc groove 101. The probe ends 201 of the two current detection sensors 2 face the branches of the rotating multi-parallel rectifier bridge, and the installation angle positions of the two current detection sensors 2 can be adjusted.

[0035] The two current detection sensors 2 are used to measure the forward current and reverse current of the same phase of the branch of the rotating multi-parallel rectifier bridge, and the angle between the probe ends 201 of the two current detection sensors 2 in the detection direction is α:

[0036] α=360° / f / 2;

[0037] Where f is the frequency of the rotating multi-parallel rectifier bridge AC power supply.

[0038] In the specific structure of the position adjustment of the current detection sensor 2:

[0039] a. The housing of the current detection sensor 2 is fixedly mounted on the mounting plate, and the mounting plate is fixedly mounted on the arc segment along the arc groove 101 by bolts. Therefore, the current detection sensor 2 can be adjusted along the arc groove 101, and then fixed by bolts after the position adjustment.

[0040] b. The housing of the current detection sensor 2 is provided with a fixing hole 203, which is set as a longitudinal waist hole. The housing of the current detection sensor 2 is fixedly mounted on the mounting plate along the mounting holes on the mounting plate by passing bolts through the fixing hole 203. The mounting holes on the mounting plate are distributed in a straight line, and the straight line formed by the mounting holes passes through the center of the rotating shaft of the rotating multi-parallel rectifier bridge. Therefore, the current detection sensor 2 can be adjusted in radial distance on the arc bracket 1 to adjust the distance from the sensor probe end 201 to the rotating shaft surface of the rotating multi-parallel rectifier bridge, and the distance from the sensor probe end 201 to the rotating shaft surface of the rotating multi-parallel rectifier bridge is controlled to be 1-2 cm.

[0041] Therefore, the utility model can continuously and directly detect the current of each branch in the rotating multi-parallel rectifier bridge, which can be used to analyze and judge the branch status, discover abnormalities in time, and then take reasonable countermeasures to avoid the expansion of faults and ensure equipment operation.

[0042] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the utility model without departing from the content of the technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A rotating multi-parallel rectifier bridge state detection device, characterized in that: It comprises an arc-shaped bracket (1) and two current detection sensors (2); The arc-shaped bracket (1) comprises an arc segment, and the arc segment is provided with a group of arc-shaped grooves (101) with the same circumferential center; The current detection sensor (2) is fixedly mounted on the arc segment along the arc groove (101); The probe ends (201) of the two current detection sensors (2) face the branch of the rotating multi-parallel rectifier bridge, and the two current detection sensors (2) are respectively used to measure the forward current and reverse current of the same phase of the branch of the rotating multi-parallel rectifier bridge, and the included angle of the probe ends (201) of the two current detection sensors (2) in the detection direction is α: α＝360° / f / 2 Where f is the frequency of the rotating multi-parallel rectifier bridge AC power supply.

2. A rotating multi-parallel rectifier bridge state detection device as claimed in claim 1, characterized in that: The two current detection sensors (2) are both electrically connected to a working power supply (3), and the working power supply (3) is fixedly mounted on the arc-shaped bracket (1).

3. A rotating multi-parallel rectifier bridge state detection device as claimed in claim 1, characterized in that: The bottom edge of the arc-shaped bracket (1) is fixedly mounted on the base bottom plate (4).

4. A rotating multi-parallel rectifier bridge state detection device as claimed in claim 1, characterized in that: The circumferential center of the arc segment is the same as the center of the rotating shaft of the rotating multi-parallel rectifier bridge, and the circumferential center of the arc groove (101) is the same as the center of the rotating shaft of the rotating multi-parallel rectifier bridge.

5. A rotating multi-parallel rectifier bridge state detection device as claimed in claim 1, characterized in that: The housing of the current detection sensor (2) is fixedly mounted on a mounting plate, and the mounting plate is fixedly mounted on the arc segment along the arc groove (101) by means of bolts.

6. A rotating multi-parallel rectifier bridge state detection device as claimed in claim 5, characterized in that: The shell of the current detection sensor (2) is provided with a fixing hole (203), the fixing hole (203) being configured as a longitudinal waist hole, and the shell of the current detection sensor (2) is fixedly mounted on the mounting plate along the mounting holes on the mounting plate by means of bolts passing through the fixing hole (203).

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