CN214622885U - Ultrahigh frequency partial discharge test system - Google Patents

Abstract

The utility model relates to a superfrequency partial discharge test system, above-mentioned superfrequency partial discharge test system includes pulse signal point firearm and superfrequency partial discharge test subsystem; the pulse signal igniter is used for generating an ultrahigh frequency pulse signal, and the ultrahigh frequency partial discharge testing subsystem collects the ultrahigh frequency pulse signal and performs ultrahigh frequency partial discharge consistency testing under the condition of maximum signal input. The method has the advantages of capability of replacing a GTEM environment test system to carry out ultrahigh frequency partial discharge consistency test under the condition of maximum signal input, simple configuration and low cost.

Description

Ultrahigh frequency partial discharge test system

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric power inspection test technical field, concretely relates to superfrequency partial discharge test system.

[ background of the invention ]

Along with the national economic development, the GIS partial discharge online monitoring system is increasingly widely applied to a power grid and forms a certain scale; GIS is called Gas Insulated Switchgear (Gas Insulated Switchgear) GIS for short. The main testing principle comprises an ultrahigh frequency method (UHF for short), the detection frequency band is between 300MHz and 1500MHz, the method has the characteristics of strong anti-interference capability, high sensitivity and the like, the contact type measuring mode is safer for secondary equipment and detection personnel, the system structure is simple, and the method is particularly suitable for online monitoring, so the method has obvious advantages compared with other detection methods. In recent years, a large number of GIS internal defect cases are discovered through ultrahigh frequency online monitoring and live test all over the country, and the GIS internal defect cases become the most important detection means in the field of GIS online detection at present.

Because the UHF signal generated by partial discharge is in a transient pulse type, the sweep frequency test cannot accurately reflect the receiving capability of the sensor and the detection system for the transient signal, and the partial discharge UHF signal has rich frequency spectrum components up to several GHz, the electromagnetic test by adopting GTEM (gigahertz transverse electromagnetic wave) is a new technology developed in the international electromagnetic field in recent years. Due to the broadband characteristic (from direct current to microwave) of the GTEM, the GTEM can be used for an electromagnetic radiation sensitivity test (EMS test, also called an immunity test) and an electromagnetic radiation test (EMI test), and the consistency of the application test result of the GTEM cell to small-volume equipment in the radio frequency test is approved by a plurality of detection mechanisms, so that the GTEM becomes a test scheme which is used conventionally. However, the equipment used in GTEM chambers is complex and costly to configure and is typically used for small numbers of automated tests.

The pulse igniter is a pulse high-frequency oscillator composed of electronic components, and the high-frequency voltage generated by the oscillator is boosted to 15KV by a step-up transformer for point discharge.

The IED is a short for Intelligent Electronic Device, and is an Intelligent Electronic Device. The IEC61850 standard defines IEDs as follows: consisting of one or more processors, with any device that receives and transmits data from or controls an external source, i.e. an electronic multifunction meter, microcomputer protection, controller, an entity capable of performing one or more logical contact tasks within the limits of the interface under certain circumstances.

[ Utility model ] content

The utility model aims at providing a can replace GTEM environment test system to carry out the ultrahigh frequency partial discharge conformance testing under the biggest signal input condition, dispose simple, with low costs ultrahigh frequency partial discharge test system.

In order to achieve the purpose, the technical scheme adopted by the utility model is an ultrahigh frequency partial discharge test system, which comprises a pulse signal igniter and an ultrahigh frequency partial discharge test subsystem; the pulse signal igniter is used for generating an ultrahigh frequency pulse signal, and the ultrahigh frequency partial discharge testing subsystem collects the ultrahigh frequency pulse signal and acts on the GIS equipment to perform ultrahigh frequency partial discharge consistency testing under the condition of maximum signal input.

Preferably, the ultrahigh frequency partial discharge test subsystem includes a terminal device and an ultrahigh frequency sensor device, the ultrahigh frequency sensor device is configured to sense the ultrahigh frequency pulse signal, and the terminal device receives the ultrahigh frequency pulse signal transmitted by the ultrahigh frequency sensor device in a wired and/or wireless manner and displays the ultrahigh frequency pulse signal.

Preferably, the terminal device includes a signal processing unit, an IED module, and a UI display unit; the IED module receives the ultrahigh frequency pulse signals transmitted by the ultrahigh frequency sensor equipment in a wired and/or wireless mode, then transmits the ultrahigh frequency pulse signals to the signal processing unit, and directly displays the ultrahigh frequency pulse signals on the UI display unit after the ultrahigh frequency pulse signals are processed by the IED module.

Preferably, the pulse signal igniter includes a controller and a tip discharge head, and the uhf sensor device includes an antenna; the controller of the pulse signal igniter and the tip discharge head are fixed in the square box, and the antenna of the ultrahigh frequency sensor device is opposite to the tip discharge head.

Preferably, the uhf sensor device antenna is 30 cm from the tip discharge head.

Compared with the prior art, the utility model following beneficial technological effect has: the method has the advantages that the tip discharge generated continuously and instantly by the stove pulse igniter is utilized to realize an effective test system, and the method can replace a GTEM environment test system to carry out ultrahigh frequency partial discharge consistency test under the condition of maximum signal input; sensitivity and dynamic range tests cannot be carried out, so that sensitivity and calibration tests cannot be realized, and only ultrahigh frequency partial discharge consistency tests under the condition of maximum signal input can be tested, so as to verify whether the performance of batch products reaches the standard or not; the cost of expenditure of manpower and material resources is reduced, the storage of the occupied space environment is reduced, the financial resources of instruments and GTEM darkrooms are saved, the price is low, and the working efficiency is improved.

[ description of the drawings ]

FIG. 1 is a schematic diagram of a UHF partial discharge test system.

[ detailed description ] embodiments

In order to make the purpose and technical solution of the embodiments of the present invention clearer, the following description will clearly and completely describe the technical solution of the embodiments of the present invention by combining the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art.

The invention will be further described with reference to the following examples and with reference to the accompanying drawings.

Example 1

The embodiment realizes an ultrahigh frequency partial discharge test system.

FIG. 1 is a schematic diagram of a UHF partial discharge test system. As shown in fig. 1, the ultrahigh frequency partial discharge test system of the present embodiment utilizes the point discharge generated by the stove pulse igniter continuously and instantaneously, so as to achieve an effective test system, and replace the GTEM environment test system to perform the ultrahigh frequency partial discharge consistency test on the GIS device under the condition of maximum signal input.

One, pulse signal igniter

The pulse signal igniter is an electronic product which utilizes the pulse principle to generate continuous instant electric sparks so as to ignite the flame of a gas appliance, and most products in recent years use alternating current as a power supply instead. With the improvement of industrial technology, the production cost of the pulse signal igniter is reduced, and the pulse signal igniter is generally applied to middle and high-end gas appliance products, so that the use of customers is greatly facilitated, and the automation level of the products is improved. Compared with the early piezoelectric ignition device, the pulse ignition device has high pulse ignition stability and simple operation. The ignition time is set automatically, so that stable ignition of the combustion system is realized, convenience and rapidness are realized, time and labor are saved, and the reliability is high. In the ultrahigh frequency partial discharge test system, the pulse signal of the pulse signal igniter is stable, the frequency spectrum is wide, and the pulse signal igniter has a strong pulse signal in the frequency spectrum range of 300MHz-1500MHz of ultrahigh frequency (UHF), so that the ultrahigh frequency partial discharge test system is skillfully used as an ultrahigh frequency pulse signal source.

Two, UHF ultrahigh frequency sensor equipment

The insulation strength and the breakdown field strength in the insulator of the power equipment are high, when local discharge occurs in a small range, the breakdown process is fast, steep pulse current is generated, the rise time of the pulse current is less than 1ns, and electromagnetic waves with the frequency up to several GHz are excited. The basic principle of a partial discharge detection ultrahigh frequency (UHF) method is that an UHF sensor is used for detecting ultrahigh frequency electromagnetic wave (300 MHz-3000 MHz) signals generated during partial discharge in power equipment, so that related information of partial discharge is obtained, and partial discharge monitoring is realized. According to different conditions of field equipment, a built-in ultrahigh frequency sensor and an external ultrahigh frequency sensor can be adopted. Because the field corona interference is mainly concentrated below a 300MHz frequency band, the UHF method can effectively avoid the field corona interference and the like, has higher sensitivity and anti-interference capability, and can realize the advantages of partial discharge electrification detection, positioning, defect type identification and the like.

Third, terminal equipment

The terminal equipment can be connected with ultrahigh frequency (UHF) sensor equipment in a wireless or wired mode, and is divided into two parts, namely a signal processing unit and an IED module. The IED module is connected with ultrahigh frequency (UHF) sensor equipment through a wireless or wired connection, and the ultrahigh frequency (UHF) sensor equipment transmits the acquired ultrahigh frequency pulse signals to the IED module. The IED module signal processing unit transmits the ultrahigh frequency pulse signal to the signal processing unit, and the ultrahigh frequency pulse signal is directly displayed on the UI unit after being processed by the IED module.

The ultrahigh frequency partial discharge test system of the embodiment utilizes a pulse igniter to generate a pulse signal for 15 seconds continuously, a discharge head of the pulse signal igniter generates point discharge (ignition spark), and ultrahigh frequency (UHF) sensor equipment to be tested collects the pulse discharge of the pulse signal igniter; the amplitude value is transmitted to an IED module of the terminal equipment in a wireless or wired mode, then transmitted to a signal processing unit through the IED module, and processed and analyzed by the IED module, and then the specific real-time amplitude value is displayed on a UI unit of the terminal equipment.

Specifically, a controller and a point discharge head of a pulse signal igniter are fixed in a square box, and the distance between the antenna surface of an ultrahigh frequency (UHF) sensor device and the point discharge head of the pulse signal igniter is 30 cm; the Ultra High Frequency (UHF) sensor equipment is connected with the terminal equipment through a wireless or wired connection, then a pulse signal igniter is turned on, Ultra High Frequency (UHF) pulse signals collected by the UHF sensor equipment are transmitted to an IED (intelligent electronic device) module of the terminal equipment through a wired or wireless mode, the IED module is transmitted to a signal processing unit, and the IED module is displayed on a UI (user interface) unit after being processed and analyzed; the terminal equipment transmits the pulse signal transmitted by the ultrahigh frequency (UHF) sensor equipment to the IED module after being judged by the signal processing unit module; and the IED module displays the pulse signal processing analysis which is judged to be correct by the signal processing unit module on a UI unit of the terminal equipment.

The following is comparative test data of the ultrahigh frequency partial discharge test system and the GTEM environment system in the embodiment.

Table i, test data of the present embodiment

TABLE II, GTEM environmental system test data

And (4) conclusion: the data tested by the ultrahigh frequency partial discharge testing system and the GTEM environmental system are stable.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the principles of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.

Claims (5)

1. An ultrahigh frequency partial discharge test system, characterized by: the ultrahigh frequency partial discharge test system comprises a pulse signal igniter and an ultrahigh frequency partial discharge test subsystem; the pulse signal igniter is used for generating an ultrahigh frequency pulse signal, and the ultrahigh frequency partial discharge testing subsystem collects the ultrahigh frequency pulse signal and performs ultrahigh frequency partial discharge consistency testing under the condition of maximum signal input.

2. A uhf partial discharge test system according to claim 1, wherein: the ultrahigh frequency partial discharge test subsystem comprises terminal equipment and ultrahigh frequency sensor equipment, wherein the ultrahigh frequency sensor equipment is used for sensing the ultrahigh frequency pulse signals, and the terminal equipment receives the ultrahigh frequency pulse signals transmitted by the ultrahigh frequency sensor equipment in a wired and/or wireless mode and displays the ultrahigh frequency pulse signals.

3. A uhf partial discharge test system according to claim 2, wherein: the terminal equipment comprises an IED module, a signal processing unit and a UI display unit; the IED module receives the ultrahigh frequency pulse signals transmitted by the ultrahigh frequency sensor equipment in a wired and/or wireless mode, then transmits the ultrahigh frequency pulse signals to the signal processing unit, and directly displays the ultrahigh frequency pulse signals on the UI display unit after the ultrahigh frequency pulse signals are processed by the IED module.

4. A uhf partial discharge test system according to claim 2, wherein: the pulse signal igniter comprises a controller and a tip discharge head, and the ultrahigh frequency sensor device comprises an antenna; the controller of the pulse signal igniter and the tip discharge head are fixed in the square box, and the antenna of the ultrahigh frequency sensor device is over against the tip discharge head.

5. An uhf partial discharge test system according to claim 4, wherein: the ultrahigh frequency sensor device antenna is 30 cm away from the point discharge head.

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