CN217276572U

CN217276572U - Temperature detection device for dry-type air-core reactor

Info

Publication number: CN217276572U
Application number: CN202123005615.8U
Authority: CN
Inventors: 马昊东; 王永红; 吴迪星
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-08-23
Anticipated expiration: 2031-12-02

Abstract

The utility model relates to a dry-type air-core reactor temperature-detecting device. The device comprises a dry-type air reactor, a data acquisition unit, a signal communication system and a monitoring terminal module, wherein an RFID temperature sensor is arranged in the dry-type air reactor and needs to be fixed on a base. The number of the required RFID temperature sensors is multiple, the RFID temperature sensors are arranged in air ducts of all layers of the dry-type air-core reactor, and three RFID temperature sensors are arranged in each air duct. Compared with the prior art, the utility model has the advantages of the security is good, and measuring range is big, real-time long-range on-line monitoring.

Description

Temperature detection device for dry-type air-core reactor

Technical Field

The utility model relates to an electric power system equipment field is about a dry-type air-core reactor temperature-detecting device based on passive wireless RFID temperature sensor

Background

With the development of the power industry, the demand of western and east power transmission and the acceleration of urban and rural electrification construction, the demand of a power system on a power reactor is greatly increased compared with the prior art. The reactor is used as equipment capable of balancing reactive power, limiting operation overvoltage and improving system operation stability, and relates to many links of power transmission of a power grid. The dry-type air-core reactor uses air as a magnetic conductive medium, and has the main advantages of good linearity, low noise, low price, high mechanical strength, simple structure and easy maintenance. Thus, the application is wide. However, the dry air reactor may have a serious magnetic flux leakage, generate a large-scale electromagnetic interference to the surrounding environment, generate an eddy current in the dry air reactor and other nearby operating equipment, increase the loss of the equipment, and bring a great influence on the stable operation of the system. In recent years, as the number of reactors put into operation and the service life increase, the failure rate of the reactors gradually increases. The reactor is frequently damaged due to the over-standard temperature rise. Most faults of the reactor are related to overhigh local temperature rise. The electric reactors are too high in encapsulation temperature in the operation process and can be burnt out finally, the manufacturing cost of each dry-type air-core electric reactor reaches dozens of ten thousand yuan or even millions of yuan, and accidents not only cause the loss of equipment, but also influence the stable work of an electric power system. Most of the existing equipment adopts manual inspection and offline detection modes to prevent accidents, but a large amount of manpower and material resources can be consumed, problems cannot be found in time, and the problems cannot be solved fundamentally. Therefore, the method is very important for online monitoring and fault diagnosis of the operation state of the dry-type air-core reactor, monitors the operation state of the reactor in real time, can find problems in advance and give an early warning, saves a large amount of resources and provides guarantee for the operation of a power system. At present, temperature sensors are required to be installed in partial online monitoring, active driving and wired transmission are adopted, but the strong electromagnetic environment of the reactor interferes with the detection of online monitoring, and the detection effect is influenced.

Disclosure of Invention

The utility model discloses an overcome the problem of above-mentioned existing detection mode and the dry-type air-core reactor temperature-detecting device that proposes, the security promotes, and stability strengthens.

The utility model discloses a temperature detects the following technique of accessible and realizes:

a temperature detection device for a dry-type air reactor comprises an RFID temperature sensor, a data acquisition unit, a signal communication system and a monitoring terminal module, wherein the RFID temperature sensor is installed on the dry-type air reactor. The RFID temperature sensor consists of an RFID temperature tag and an ultrahigh frequency ceramic substrate antenna which are connected. The number of the required sensors is multiple, and the temperature sensors are installed in an air duct of the dry type air-core reactor.

The RFID temperature sensor is fixed on the epoxy rods through nylon screws, and 3 RFID sensors are installed on each epoxy rod. And a concave device is adhered to the end part of the epoxy rod through high-temperature-resistant structural adhesive. The epoxy rod and the ceramic concave device together form a base. The upper part, the middle part and the lower part of each layer of air duct of the dry-type air-core reactor are respectively provided with a sensor, the sensors are not in contact with the reactor in the air duct, and the sensors are parallel to the air duct.

The length of the concave part in the middle of the concave device is equal to the thickness of the reactor coil, the concave part can be clamped on the reactor coil, the concave device is convenient to install, the concave device can be made of ceramic, and the ceramic and epoxy resin material is good in heat-conducting property and insulating property. The two materials can not interfere with the operation of the reactor, the RFID temperature tag can accurately acquire temperature data due to the heat conduction performance of the two materials, and in addition, the two materials have certain flame retardance and are not easy to catch fire.

In addition, the system should also have temperature alarm system, and alarm system and data acquisition system link to each other, and alarm system needs to set for each early warning temperature and early warning rank, and different temperature intervals correspond different early warning reaction rank. And when the temperature is in different intervals, carrying out corresponding grade early warning. And when the temperature exceeds the set early warning temperature upper limit critical value, the early warning system starts to give an alarm.

The frequency of the RFID temperature tag is reduced after the RFID temperature tag is installed in the air duct, and the design frequency is properly increased, so that the error of signal transmission is reduced. The sensor adopts an anti-metal design to avoid electromagnetic shielding and interference on signal transmission.

The ultrahigh frequency ceramic substrate antenna can modulate temperature data acquired and detected by the RFID temperature tag in a radio frequency mode into a high-frequency electromagnetic signal, then the high-frequency electromagnetic signal is emitted out and transmitted to the data acquisition system, the data acquisition device sends the temperature data to the monitoring terminal module through the signal communication system, and the monitoring terminal module can detect the temperature of the dry-type air reactor.

The signal communication system adopts the wireless communication of 2.4GHz frequency band, and has good transmission effect and long distance.

The utility model discloses following beneficial effect has:

the RFID temperature sensor is arranged in the air duct of the dry-type air-core reactor, the RFID temperature sensor is parallel to the air duct of the reactor and does not contact with the reactor, three sensors are arranged in each layer of air duct, comprehensive monitoring can be achieved, and the scheme safety is good.

The utility model discloses can accurately reflect the temperature of reactor, the reactor does not produce the interference of high-frequency electromagnetic field, does not influence the sensor and normally works, with radio communication, can realize normal communication.

The utility model discloses simple structure, easy installation, the remote status real-time detection of equipment can be realized to the simple operation, and the alarm can in time send out the police dispatch newspaper, and the steady operation of electric power system is guaranteed to the lifting means maintenance level.

Drawings

FIG. 1 is a schematic block diagram of the temperature measuring device of the present invention;

fig. 2 is a schematic view of the installation of the RFID temperature sensor.

Detailed Description

In order to fully explain the flow, the effect obtained by the working method and the purpose of the present invention, the following description will be made in detail with reference to the accompanying drawings and the detailed description.

The embodiment provides a dry-type air-core reactor temperature detection device, as shown in fig. 1 and fig. 2, which includes an RFID temperature sensor 2 to be installed in a dry-type air-core reactor 1, a base 3 for fixing the temperature sensor, a data collector 4, a signal communication system 5, and a monitoring terminal module 6. The number of the required temperature sensors 2 is multiple, the sensors are arranged in air ducts of all layers of the dry-type air-core reactor, and three RFID temperature sensors are arranged in each air duct.

The data acquisition unit 4 is connected with an alarm, the alarm adopts a sound alarm, and when the temperature exceeds the set temperature critical value upper limit, the alarm gives out a sound alarm.

Base 3 is glued by high temperature resistant structure by ceramic base 31 and epoxy pole 32 and forms, and ceramic base 31 is the concave type structure, is connected in order by first riser 311, diaphragm 312 and second riser 313 and constitutes. The length of diaphragm 322 equals with the width of reactor coil, and ceramic substrate can block on the reactor coil, and the installation is convenient. The RDID temperature sensor is fixed to the epoxy rod 32 with nylon screws.

The base is made of ceramic and epoxy resin, so that the two materials have good heat-conducting property and insulating property. The ceramic and epoxy resin materials cannot interfere with the operation of the reactor, the RFID temperature tag can accurately acquire temperature data due to the heat conducting performance of the ceramic and epoxy resin materials, and in addition, the two materials have certain flame retardance and are not easy to catch fire.

The temperature measuring method of the temperature detecting system comprises the following specific steps:

the RFID temperature sensor firstly obtains temperature data through the RFID temperature tag, high-frequency electromagnetic waves received by the ceramic substrate antenna are converted into energy through the internal RFID radio frequency chip, information is modulated into high-frequency electromagnetic wave signals and is reflected and sent out from the ceramic substrate antenna, after the high-frequency electromagnetic wave signals are transmitted to the data acquisition system, the data acquisition device sends the temperature data to the monitoring terminal module through the signal communication system, and the monitoring terminal module can detect the temperature of the dry-type air reactor.

Setting temperature alarm threshold values, setting different alarm levels for different temperatures, and when the temperatures reach the different temperature threshold values, sending out corresponding acoustic alarms to start alarming. The staff handles in time according to the early warning, prevents that electrical equipment from damaging because the temperature rise is too high, establishes electric power system power supply stable.

The foregoing embodiments have described the principles and features of the invention. Can be according to the actual application needs, under the enlightenment of the utility model, improve to a certain extent to aspects such as its structure, all be in the protection scope of the utility model.

Claims

1. The utility model provides a dry-type air-core reactor temperature-detecting device, including installing RFID temperature sensor (2) in dry-type air-core reactor (1), base (3) for fixed RFID temperature sensor (2), the device still includes data collection station (4), signal communication system (5), monitor terminal module (6), the quantity of the RFID temperature sensor (2) that characterized by adopted is a plurality of, install RFID temperature sensor (2) in each layer of encapsulation wind channel of dry-type air-core reactor (1), install three RFID temperature sensor (2) in each layer of wind channel.

2. A dry-type air-core reactor temperature detection device according to claim 1, characterized in that three RFID temperature sensors (2) are installed in the air duct of the dry-type air-core reactor (1), and the RFID temperature sensors (2) are not in contact with the dry-type air-core reactor (1) in the air duct, and are kept in parallel.

3. A dry-type air-core reactor temperature detecting device according to claim 1, characterized in that the RFID temperature sensor (2) is fixed on the epoxy rod (32) by nylon screws, a ceramic base (31) is adhered to the end of the epoxy rod (32) by a high temperature resistant structural adhesive, and the epoxy rod (32) and the ceramic base (31) together form the base (3).

4. A dry-type air-core reactor temperature detection device according to claim 1, characterized in that the base (3) is formed by bonding a ceramic base (31) and an epoxy rod (32) by a high temperature resistant structural adhesive, the ceramic base (31) is of a concave structure and is formed by connecting a first vertical plate (311), a horizontal plate (312) and a second vertical plate (313) in sequence.