CN208921312U - Intelligent temperature monitoring device for power transformer - Google Patents

Abstract

The utility model power transformer monitoring temperature field, a kind of intelligent temperature monitoring device for power transformer is disclosed, including power-switching circuit, power detecting chip, accumulator, single-chip microcontroller and multiple peripheral hardwares, the peripheral hardware includes at least one processor；The working power supply that power-switching circuit provides, carries out charging energy-storing by accumulator, and single-chip microcontroller is supplied to work, and single-chip microcontroller is used to control the operation of peripheral hardware and stores temperature data into memory；Power detecting chip and accumulator are connected electrically between power-switching circuit and single-chip microcontroller in parallel, for detection of power loss and single-chip microcontroller is sent a signal to, single-chip microcontroller controls accordingly to be stopped other circuit modules power supply into multiple peripheral hardwares and only power to memory to maintain temperature data to store.The intelligent temperature monitoring device of the utility model can the storage temperature data under trip condition as multiple as possible, solve the problems, such as that traditional preservation data are not complete or incomplete.

Description

Intelligent temperature monitoring device for power transformer

Technical field

The utility model relates to the temperature monitor and controls of power system transformer technical field, especially transformer, specifically For be related to a kind of intelligent temperature monitoring device for power transformer.

Background technique

Power transformer is primary equipment important in electric system, and transformer is in energy transmission and conversion process, meeting Part electric energy is consumed, thermal energy is converted into, the temperature of each position of transformer is caused to increase.When inside is broken down, especially It shows as three line packet temperature to rise, in order to protect the normal operation of transformer and electric system, need through intelligent temperature control Device processed carries out monitoring temperature to the critical component of transformer especially line packet, high temperature alarm, and when overtemperature trips, while to generation Temperature history carry out continuous storage in favor of subsequent analysis.

It is carried out when traditional intelligent temperature control equipment is usual based on single-chip microcontroller, using multiple sensors come temperature collection, is gone forward side by side Row storage.But on existing temperature control device, when being calculated and stored using AT89C51 single-chip microcontroller, pass through the 4K word in its piece The memory of section is stored,, will be remaining by single-chip microcontroller due to the cutting in the source that powers when transformer or when system is powered down Electric energy is distributed to each external components, such as wireless sending module (sending temperature signal), display module, mould of alarming Block, relay and memory etc. lead to time and the electricity that actually can really carry out temperature data storage when abnormal Can be considerably less, therefore more temperature datas can not be normally saved, it is unfavorable for carrying out subsequent analysis.

Utility model content

The utility model aim is to provide a kind of intelligent temperature monitoring device for power transformer, can fall to exception The preservation for more carrying out temperature data when electric using power supply, reduces the power consumption of other peripheral hardwares.

To reach above-mentioned purpose, the utility model proposes a kind of intelligent temperature monitoring device for power transformer, packets Power-switching circuit, power detecting chip, accumulator, single-chip microcontroller and multiple peripheral hardwares are included, the peripheral hardware includes at least one Memory, in which:

The power-switching circuit include an AD/DC conversion module, be connected to external power supply, to carry out power conversion with The working power of intelligent temperature monitoring device is provided；

The accumulator and single-chip microcontroller are successively connected in series with the power-switching circuit, and AD/DC conversion module mentions The power supply of confession is supplied, and carries out charging energy-storing by the accumulator, and the single-chip microcontroller is supplied to work, single-chip microcontroller is for controlling It makes the operation of the peripheral hardware and stores temperature data into at least one processor；

Wherein, the power detecting chip and accumulator be connected electrically in parallel power-switching circuit and single-chip microcontroller it Between, for detection of power loss and single-chip microcontroller is sent a signal to, single-chip microcontroller stops in response to signal control into multiple peripheral hardwares Other circuit modules power and only power to memory to maintain temperature data to store.

In further embodiment, the single-chip microcontroller is provided with temperature data interface, the temperature detection with power transformer Circuit connection, for receiving the temperature data detected.Preferably, temperature sensing circuit is using PTC thermistor as temperature Detection sensor.

According to above technical solution, compared with prior art, be particularly advantageous in that the utility model proposes electricity The intelligent temperature monitoring device of power transformer saves the temperature data detected, and pass through setting on the one hand when operating normally The good period is sent out to monitoring center or server, and on the other hand, when system is powered down, such as transformer temperature is excessively high leads When causing trip protection, power module will be unplugged supply, and temperature control device will be powered by energy storage device (capacitor), cut off it Most of remaining power supply is supplied in the storage work of single-chip microcontroller, memory by the working power of his peripheral hardware, so that power-off The temperature data of front and back can save completely as far as possible, be conducive to subsequent data and analyze, and avoid traditional directly cutting off the power After supply, the power supply only deposited is caused temperature data to keep imperfect by decentralized supply, cannot timely save after causing Continuous analysis is difficult or makes mistakes.

Detailed description of the invention

Fig. 1 is the schematic diagram of the intelligent temperature monitoring device of the utility model one embodiment.

Specific embodiment

In order to know more about the technology contents of the utility model, spy lifts specific embodiment and institute's accompanying drawings is cooperated to be described as follows.

As shown in connection with fig. 1, the disclosed intelligent temperature monitoring device for being used for power transformer according to the present utility model, from Transformer takes electricity and is supplied to single-chip microcontroller and corresponding peripheral hardware after carrying out voltage conversion, make temperature control device realize monitoring temperature, The functions such as storage, display, alarm, remote transmission.In each embodiment of the utility model, in (the monitoring of conventional temperature control device Device) on the basis of, it is also additionally arranged power detecting chip, by the real-time detection of electric current and/or voltage to determine transformer Working condition, and response signal is issued in time, single-chip microcontroller will control the variation of power supply supply according to this response signal, so that The electric energy of energy storage device (capacitor) storage is used for the storage of temperature data as far as possible when special circumstances occur, is avoided outside other If the additional consumption such as equipment such as wireless transmitter module, display module, alarm module.

Below with reference to the exemplary realization for more specifically introducing above scheme shown in Fig. 1.As shown in Figure 1 is used for electric power The intelligent temperature monitoring device 100 of transformer includes power-switching circuit 101, accumulator 102, single-chip microcontroller 103 and multiple Peripheral hardware.These peripheral hardwares are configured for realizing that the function of some or certain some aspects of temperature control device, such as data are deposited Storage, data show, buzzing alarm, sound-light alarm or vibration alarm, transmits wirelessly data etc..In each of the utility model In scheme, these peripheral hardwares include at least one processor 104, are arranged for the storage of temperature data.Memory 104 is especially excellent Select nonvolatile memory, such as EPROM, E2PROM, E2PROM and Flash Memory (flash memory).

Power-switching circuit 101 include an AD/DC conversion module, be connected to external power supply, to carry out power conversion with The working power of intelligent temperature monitoring device is provided.As shown in connection with fig. 1, the use YDSP-A-5V_8W group of AD/DC conversion module Part, input are 85-265VAC, export 5V DC voltage.

Accumulator 102 and single-chip microcontroller 103 are successively connected in series with power-switching circuit 101, and AD/DC conversion module mentions The power supply of confession supplies (5V direct current), carries out charging energy-storing by accumulator 102, and is supplied to single-chip microcontroller 103 (and its outer If) work, single-chip microcontroller is for controlling the operation of peripheral hardware and storing temperature data into memory 104.

Accumulator 102 includes the concatenated high frequency low-resistance capacitor of at least two, such as electrolytic capacitor YXF, the utility model In preferred utility model, capacitor can use Rubycon electrolytic capacitor, product type: 35YXF1000M, rated capacity: 1000UF, voltage rating: 35V.

Illustratively shown part peripheral hardware in Fig. 1, for example, show for data display module 105, for wireless The wireless sending module 106 that data are transmitted and the buzzer 107 for audible alarm.

As shown in connection with fig. 1, power detecting chip 110 is connected electrically in power-switching circuit with accumulator 102 in parallel Between 101 and single-chip microcontroller 103, for detection of power loss and single-chip microcontroller is sent a signal to.Single-chip microcontroller in response to signal control stop to Other circuit modules in multiple peripheral hardwares power and only power to memory to maintain temperature data to store.

In the utility model preferred embodiment, power detecting chip 110 uses MAX813LESA monitoring chip, in its inspection Voltage is measured lower than low level after setting value, is generated to single-chip microcontroller, other peripheral hardwares other than memory are closed in single-chip microcontroller control, and When storing data.

Single-chip microcontroller uses the STM32 series monolithic of ST company, especially STM32F030R8T6 single-chip microcontroller.

In foregoing individual embodiments, related transformer refers in particular to dry-type transformer, is detected by three PT100 Device is embedded in the winding of transformer, is used to monitoring temperature, realizes winding temperature detection, the tripping of overtemperature sensing and failure communication Etc. functions.By adopting the above scheme, disappearing moment in input voltage, single-chip microcontroller can be closed as calculation processing component without outside the Pass If, so as to improve traditional single-chip microcontroller ceaselessly storing data at regular intervals, leading to list attentively to record temperature data The waste of piece machine resource, while there is also lose data.

Although the utility model has been disclosed with preferred embodiment as above, so it is not intended to limit the utility model.This reality It is without departing from the spirit and scope of the utility model, each when that can make with novel those of ordinary skill in the art Kind changes and retouches.Therefore, the protection scope of the utility model is subject to view those as defined in claim.

Claims (7)

1. a kind of intelligent temperature monitoring device for power transformer, which is characterized in that examined including power-switching circuit, power supply Surveying chip, accumulator, single-chip microcontroller and multiple peripheral hardwares, the peripheral hardware includes at least one processor；

The power-switching circuit includes an AD/DC conversion module, is connected to external power supply, to carry out power conversion to provide The working power of intelligent temperature monitoring device；

The accumulator and single-chip microcontroller are successively connected in series with the power-switching circuit, and the AD/DC conversion module mentions The working power of confession is supplied, and carries out charging energy-storing by the accumulator, and the single-chip microcontroller is supplied to work, single-chip microcontroller is used It stores in the operation of control peripheral hardware and by temperature data into at least one processor；

Wherein, the power detecting chip and accumulator are connected electrically between power-switching circuit and single-chip microcontroller in parallel, are used In detection of power loss and single-chip microcontroller is sent a signal to, single-chip microcontroller is controlled in response to the signal and only powered to memory to maintain temperature Data storage.

2. the intelligent temperature monitoring device according to claim 1 for power transformer, which is characterized in that the energy storage Circuit includes at least two concatenated high frequency low-resistance capacitors.

3. the intelligent temperature monitoring device according to claim 1 for power transformer, which is characterized in that the power supply Detection chip adopts MAX813LESA, detects voltage lower than low level after setting value, is generated to single-chip microcontroller at it, single-chip microcontroller controls Only power to memory, timely storing data.

4. the intelligent temperature monitoring device according to claim 1 for power transformer, which is characterized in that the AD/ The model YDSP-A-5V_8W of DC conversion module, input are 85-265VAC, are exported as 5V DC voltage.

5. the intelligent temperature monitoring device according to claim 1 for power transformer, which is characterized in that the monolithic Machine uses the STM32 series monolithic of ST company.

6. the intelligent temperature monitoring device according to claim 1 for power transformer, which is characterized in that the monolithic Machine is provided with temperature data interface, connect with the temperature sensing circuit of power transformer, for receiving the temperature data detected.

7. the intelligent temperature monitoring device according to claim 6 for power transformer, which is characterized in that the temperature Detection circuit is using PTC thermistor as temperature detection sensor.