Insulation strength testing device for clean air current transformer

Abstract

The utility model relates to an insulating strength testing device for a clean air current transformer, which belongs to the technical field of electrical equipment detection and comprises a high-voltage generator, a connecting flange, a communicating pipe, a detection component, a control module, a communication module and a power supply module for supplying power to the whole device. The high-voltage generator is connected to one end of the communicating pipe through the connecting flange, the detection assembly is fixed to the other end of the communicating pipe, the control module is arranged in the communicating pipe, and the end, away from the connecting flange, of the high-voltage generator penetrates through an end cover flange of the clean air current transformer and then extends out of the clean air current transformer. The high-pressure generator and the end cover flange are in sealed connection, and the connecting flange and the end cover flange are fixedly connected through a bolt and a nut; core components such as the high-voltage generator and the detection assembly are ingeniously arranged in the clean air current transformer, the size of the testing device is remarkably reduced, the occupied area is reduced, and therefore the construction cost of a transformer substation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical equipment detection technical field, concretely relates to a kind of insulation strength testing device of clean air current transformer. BACKGROUND

[0002] In the core pivot of power transmission and distribution in substation, clean air transformer plays a pivotal role. The pros and cons of its insulation performance not only concern the stable operation of the transformer itself, but also is an important guarantee for the safety of the entire power system. With the continuous progress of power system technology, the increase of voltage level and the expansion of capacity have become the trend, which undoubtedly puts forward more stringent requirements for the insulation strength of clean air transformer.

[0003] Traditional current transformer insulation strength test methods, such as power frequency withstand voltage test and partial discharge test, can reveal the insulation performance of the transformer to some extent, but the existing test devices have exposed a series of problems. First of all, these test devices are often bulky and occupy a wide area, which not only increases the construction cost of the substation, but also brings many inconveniences in equipment installation, debugging and later maintenance. The bulky volume limits the flexibility of the equipment, making it difficult to find a suitable installation location in the complex and variable substation environment.

[0004] In addition, the high voltage required in the test process poses a serious challenge to the safety of the test personnel. In a high voltage environment, improper operation or equipment failure can easily cause electric shock accidents, not only threatening the safety of the test personnel, but also possibly causing serious damage to the equipment, posing a great risk to the stable operation of the power system. Therefore, how to ensure the accuracy of the test while improving the safety of the test device and reducing its size has become a technical problem to be solved. UTILITY MODEL CONTENTS

[0005] The utility model aims at the defects in the prior art, and provides an insulation strength test device for clean air current transformer to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An insulation strength test device for clean air current transformer, comprising a high-voltage generator, a connecting flange, a communication pipe, a detection assembly, a control module, a communication module and a power module for powering the entire device; the high-voltage generator, the connecting flange, the communication pipe and the detection assembly are all arranged in the clean air current transformer;

[0008] The high-voltage generator is connected to the communication pipe by a connecting flange to obtain one end, the detection assembly is fixed to the other end of the communication pipe, the control module is arranged in the communication pipe, the end of the high-voltage generator away from the connecting flange extends to the outside of the clean air current transformer after penetrating the end cover flange of the clean air current transformer, the high-voltage generator and the end cover flange are sealingly connected, and the connecting flange and the end cover flange are fixedly connected by bolts and nuts.

[0009] The detection assembly is connected to the input end of the control module, the high-voltage generator is connected to the output end of the control module, and the control module is connected to the external test platform including a display screen through the communication module.

[0010] Further, the detection assembly comprises a mounting seat, a voltage sensor, a current sensor and a partial discharge sensor.

[0011] The voltage sensor, the current sensor and the partial discharge sensor are all fixed on the mounting seat, and one end of the mounting seat away from the voltage sensor, the current sensor and the partial discharge sensor is fixedly connected with the communication pipe.

[0012] The voltage sensor, the current sensor and the partial discharge sensor are all connected to the input end of the control module.

[0013] Further, the mounting seat is a hemispherical mounting seat, a plane of the hemispherical mounting seat is fixedly connected with the communication pipe, and the voltage sensor, the current sensor and the partial discharge sensor are installed on the curved surface of the hemispherical mounting seat.

[0014] Further, the voltage sensor is a voltage sensor of a model of OMRON SDV-FL series.

[0015] Further, the current sensor is a Hall sensor of a model of LEM LTS series.

[0016] Further, the partial discharge sensor is an ultrasonic sensor of a model of PXR15RMH.

[0017] The utility model discloses a beneficial effect lies in, through the high -voltage generator, the detection component and so on core part is ingeniously built -in in clean air current transformer inside, the volume of test device is reduced significantly, and the floor area is reduced, thereby reduce the construction cost of transformer substation. Meanwhile, this design also improves the flexibility of equipment, makes in the complex and changeable transformer substation environment can be more easily find the suitable installation position, brings great convenience for the installation, debugging and later maintenance of equipment. In addition, the sealing connection between high -voltage generator and end cover flange, and the fixed connection of connecting flange and end cover flange through bolt and nut, ensure the safety under high -voltage environment in the testing process. This design effectively prevents the electric shock accident caused by improper operation or equipment failure, protects the life safety of test personnel, also avoids the damage of equipment, reduces the risk of stable operation of power system. In addition, the voltage sensor, current sensor and partial discharge sensor are integrated in the detection component, can monitor the voltage, current and partial discharge of mutual inductor in the testing process simultaneously, thereby comprehensively and accurately evaluates the insulation performance of mutual inductor.

[0018] In addition, the utility model discloses the design principle is reliable, simple structure has very extensive application prospect.

[0019] Therefore, the utility model discloses compared with prior art has prominent substantial characteristics and obvious progress, and the beneficial effect of its implementation is also obvious. ACCURACY

[0020] Figure 1 It is the structure schematic drawing of the utility model test device.

[0021] Figure 2 It is the structure schematic drawing of the utility model test device installation in clean air current transformer inside.

[0022] 110 is high -voltage generator, 120 is connecting flange, 130 is the communicating pipe, 140 is detection component, 150 is control module, 200 is clean air current transformer, 210 is end cover flange. CONCRETE IMPLEMENTING METHOD

[0023] In order to make the personnel in the technical field better understand the technical scheme in the utility model, the technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment only is a part of the embodiment of the utility model, but not all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skilled in the art obtains without making the creative labor should belong to the scope of the protection of the utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0025] As shown in Figure 1 and Figure 2 The utility model provides a kind of insulation strength test device of clean air current transformer, including high voltage generator, connecting flange, communication pipe, detection component, control module, communication module and power module for the power supply of entire device;High voltage generator, connecting flange, communication pipe and detection component are all arranged in clean air current transformer;High voltage generator is connected to the one end of communication pipe by connecting flange, detection component is fixed at the other end of communication pipe, control module is arranged in communication pipe, the end of high voltage generator away from connecting flange extends to clean air current transformer outside after penetrating the end cover flange of clean air current transformer, high voltage generator and end cover flange are sealingly connected, and connecting flange and end cover flange are fixedly connected by bolt and nut;Detection component is connected to the input end of control module, and high voltage generator is connected to the output end of control module, and control module is connected to external test platform including display screen by communication module.

[0026] Specifically, detection component includes mounting seat, voltage sensor, current sensor and partial discharge sensor;Voltage sensor, current sensor and partial discharge sensor are all fixed on mounting seat, and the end of mounting seat away from voltage sensor, current sensor and partial discharge sensor is fixedly connected with communication pipe;Voltage sensor, current sensor and partial discharge sensor are all connected to the input end of control module.

[0027] Among them, voltage sensor adopts the type of Omron SDV-FL240 type voltage sensor, and voltage sensor is used to measure the high voltage value (measuring power frequency voltage) applied on current transformer, and the sensor can capture voltage change with high precision, to ensure the accuracy of voltage value in test process.

[0028] Current sensor adopts the type of Limes LTS25-NP type hall sensor, and is used to measure the current value (measuring rated continuous thermal current) of primary side and / or secondary side of current transformer. This sensor can accurately measure the size and direction of current, so as to evaluate the ratio and error of current transformer.

[0029] Partial discharge sensor adopts the type of PXR15RMH ultrasonic sensor, and is used to measure the partial discharge amount of current transformer. The sensor can sense the partial discharge phenomenon inside current transformer, and convert discharge signal into electric signal for measurement. Specifically, the partial discharge amount is measured by detecting ultrasonic signal generated by partial discharge.

[0030] In addition, the mounting seat adopts a semi-spherical mounting seat, a plane of the semi-spherical mounting seat is fixedly connected with the communicating pipe, and the voltage sensor, the current sensor and the partial discharge sensor are mounted on a curved surface of the semi-spherical mounting seat. The semi-spherical design is not only beautiful, but also can effectively disperse stress and improve the stability of installation.

[0031] The above disclosed is only the preferred embodiment of the present application, but the present application is not limited to this, any person skilled in the art can think of non-creative changes, and a number of improvements and refinements made without departing from the principles of the present application, should fall within the scope of the present application.

Claims

1. A clean air current transformer insulation strength testing device characterized by, The device comprises a high-voltage generator, a connecting flange, a communication pipe, a detection assembly, a control module, a communication module and a power module for supplying power to the whole device; the high-voltage generator, the connecting flange, the communication pipe and the detection assembly are arranged in the clean air current transformer; The high-voltage generator is connected to the communication pipe through the connecting flange to obtain one end, the detection assembly is fixed at the other end of the communication pipe, the control module is arranged in the communication pipe, the end of the high-voltage generator away from the connecting flange extends to the outside of the clean air current transformer after penetrating the end cover flange of the clean air current transformer, the high-voltage generator and the end cover flange are sealingly connected, and the connecting flange and the end cover flange are fixedly connected through bolts and nuts. The detection assembly is connected to the input end of the control module, the high-voltage generator is connected to the output end of the control module, and the control module is connected to the external test platform including a display screen through the communication module.

2. The clean air current transformer insulation strength test apparatus of claim 1, wherein, The detection assembly comprises a mounting seat, a voltage sensor, a current sensor and a partial discharge sensor. The voltage sensor, the current sensor and the partial discharge sensor are fixed on the mounting seat, and the end of the mounting seat away from the voltage sensor, the current sensor and the partial discharge sensor is fixedly connected with the communication pipe. The voltage sensor, the current sensor and the partial discharge sensor are connected to the input end of the control module.

3. The clean air current transformer insulation strength test apparatus of claim 2, wherein, The mounting seat adopts a hemispherical mounting seat, the plane of the hemispherical mounting seat is fixedly connected with the communication pipe, and the voltage sensor, the current sensor and the partial discharge sensor are mounted on the curved surface of the hemispherical mounting seat.

4. The clean air current transformer insulation strength test apparatus of claim 2, wherein, The voltage sensor adopts a voltage sensor of model Omron SDV-FL series.

5. The clean air current transformer insulation strength test apparatus of claim 2, wherein, The current sensor adopts a Hall sensor of model LEM LTS series.

6. The clean air current transformer insulation strength test apparatus of claim 2, wherein, The partial discharge sensor adopts an ultrasonic sensor of model PXR15RMH.

Images