CN204203344U - A kind of resonance overvoltage monitoring device - Google Patents

A kind of resonance overvoltage monitoring device Download PDF

Info

Publication number
CN204203344U
CN204203344U CN201420724237.XU CN201420724237U CN204203344U CN 204203344 U CN204203344 U CN 204203344U CN 201420724237 U CN201420724237 U CN 201420724237U CN 204203344 U CN204203344 U CN 204203344U
Authority
CN
China
Prior art keywords
voltage
module
chip
sampling
microcontroller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201420724237.XU
Other languages
Chinese (zh)
Inventor
高伟
郭谋发
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Fuzhou University
State Grid Fujian Electric Power Co Ltd
Changle Power Supply Co of State Grid Fujian Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Fuzhou University
State Grid Fujian Electric Power Co Ltd
Changle Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Fuzhou University, State Grid Fujian Electric Power Co Ltd, Changle Power Supply Co of State Grid Fujian Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201420724237.XU priority Critical patent/CN204203344U/en
Application granted granted Critical
Publication of CN204203344U publication Critical patent/CN204203344U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a kind of resonance overvoltage monitoring device.Comprising microcontroller, communication module, sampling A/D chip, voltage conversion circuit for sampled voltage signal for carrying out communicating with main website, being arranged at the front voltage mutual inductor on 10kV or 35kV bus and the power circuit for powering for whole device; Described microcontroller is connected to described sampling A/D chip by SPI serial communication interface, and is connected with described front voltage mutual inductor through this sampling A/D chip and voltage conversion circuit, and described microcontroller is also connected with described communication module by USART serial communication interface; Described power circuit comprises the filtration module, voltage reduction module, rectification module and the Voltage stabilizing module that connect successively, and the input end of described filtration module is connected to 220V AC power.The utility model circuit structure is simple, is easy to realize, and is convenient to practical application and promotes, have wide market outlook.

Description

A kind of resonance overvoltage monitoring device
Technical field
The utility model relates to a kind of resonance overvoltage monitoring device.
Background technology
In small electric current grounding system of distribution network, the ferroresonance of voltage transformer (VT) is a common fault.When producing certain shock vibration, the transient state impact process produced can excite ferroresonance phenomenon between PT and three-phase conducting wire ground capacitance, causes system overvoltage and PT excess current.At present, in order to suppress ferroresonance, being all by monitoring and gathering the voltage of PT secondary side, in distribution main website, judgement being carried out to waveform and identify, carrying out harmonic elimination finally by sealing in damping resistance.
The terminal of alternative supervision PT resonance overvoltage is rarely found in the market, and the single-chip microcomputer processing speed that it adopts is fast not, sampling rate is lower, function singleness, be not easy to the expansion of monitoring arrangement function, equally also be not suitable for realizing complicated algorithm, be difficult to the needs meeting distribution network automated development.
Summary of the invention
It is simple that the purpose of this utility model is to provide a kind of circuit structure, is easy to the resonance overvoltage monitoring device realized.
For achieving the above object, the technical solution of the utility model is: a kind of resonance overvoltage monitoring device, comprising microcontroller, communication module, sampling A/D chip, voltage conversion circuit for sampled voltage signal for carrying out communicating with main website, being arranged at the front voltage mutual inductor on 10kV or 35kV bus and the power circuit for powering for whole device; Described microcontroller is connected to described sampling A/D chip by SPI serial communication interface, and is connected with described front voltage mutual inductor through this sampling A/D chip and voltage conversion circuit, and described microcontroller is also connected with described communication module by USART serial communication interface; Described power circuit comprises the filtration module, voltage reduction module, rectification module and the Voltage stabilizing module that connect successively, and the input end of described filtration module is connected to 220V AC power.
In the utility model embodiment, described microcontroller adopts STM32F407VGT6 chip.
In the utility model embodiment, described voltage conversion circuit comprises a closed loop Hall voltage sensor, and this closed loop Hall voltage sensor adopts HCV-10E.
In the utility model embodiment, described sampling A/D chip adopts AD7606.
In the utility model embodiment, described communication module is GPRS module, and this GPRS module adopts ME3000 V2.
In the utility model embodiment, described Voltage stabilizing module adopts two-way voltage stabilizing chip LM2596, DC voltage for being exported by described rectification module transfers 5V to and is used for the 4.2V direct voltage output for GPRS powers, wherein, 5V DC voltage is converted to 12V and 3.3V voltage through Switching Power Supply and 3.3V voltage stabilizing chip respectively.
Compared to prior art, the utility model has following beneficial effect:
1, the utility model adopts the STM32F407VGT6 of high-performance and low-cost, and sampling rate is high, and sampling precision is high, provides good support for analyzing and tackle power distribution network PT resonance overvoltage;
2, by GPRS communication network, scheme realizes easy, and transmission reliability is high, and communication is stable, and in-site installation is convenient, reduces and lays communication line separately; Realize the monitoring of long-range PT resonance overvoltage; Monitoring device energy and alarm uploading data when superpotential occurs PT, decrease workload, improve automatization level, good basis is provided for staff analyzes data, ensure that safely and steadily running of equipment, the development of the utility model device has very strong realistic meaning and practical value.
Accompanying drawing explanation
Fig. 1 is the utility model resonance overvoltage monitoring device theory diagram.
Fig. 2 is the utility model resonance overvoltage monitoring device application block diagram.
Fig. 3 is the utility model power circuit principle block diagram.
Fig. 4 is the utility model power circuit principle figure.
Fig. 5 is the utility model sampling A/D chip pin connection layout.
Fig. 6 is the utility model microcontroller pin connection layout.
Fig. 7 is the utility model GPRS module pin connection layout.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is specifically described.
A kind of resonance overvoltage monitoring device of the present utility model, comprising microcontroller (adopt STM32F407VGT6 chip), communication module (described communication module is GPRS module, and this GPRS module adopts ME3000 V2), sampling A/D chip (adopting AD7606), voltage conversion circuit for sampled voltage signal for carrying out communicating with main website, being arranged at the front voltage mutual inductor on 10kV or 35kV bus and the power circuit for powering for whole device; Described microcontroller is connected to described sampling A/D chip by SPI serial communication interface, and is connected with described front voltage mutual inductor through this sampling A/D chip and voltage conversion circuit, and described microcontroller is also connected with described communication module by USART serial communication interface; Described power circuit comprises the filtration module, voltage reduction module, rectification module and the Voltage stabilizing module that connect successively, and the input end of described filtration module is connected to 220V AC power.
Described voltage conversion circuit comprises a closed loop Hall voltage sensor, and this closed loop Hall voltage sensor adopts HCV-10E.
Described Voltage stabilizing module adopts two-way voltage stabilizing chip LM2596, DC voltage for being exported by described rectification module transfers 5V to and is used for the 4.2V direct voltage output for GPRS powers, wherein, 5V DC voltage is converted to 12V and 3.3V voltage through Switching Power Supply and 3.3V voltage stabilizing chip respectively.
For better telling about the utility model, below in conjunction with hardware circuit of the present utility model and existing software in detail the utility model specific works principle is described in detail, specifically relating to software description part is not protection content of the present utility model.
As accompanying drawing 1, the novel resonance overvoltage monitoring terminal of the utility model comprises voltage conversion circuit 2, sampling A/D chip 3, microcontroller 4, communication module 5, power supply 6.Described microcontroller 4 and sampling A/D chip 3 adopt SPI serial communication interface to be connected, and microcontroller 4 and communication module 5 adopt USART serial communication to be connected.
Front voltage mutual inductor PT(is connected on 10kV or 35kV bus) three-phase voltage of secondary side and residual voltage signal 1 input this device.By closed loop Hall voltage mutual inductor HCV-10E, voltage transitions is become the electric current of mA rank, then flow through measuring resistance RM and obtain voltage, this voltage signal (between-10V ~+10V) is sent into sampling A/D chip 3.Sampling A/D chip 3 converts analog voltage amount to digital quantity, adopts SPI serial communication mode to read ADC value by microcontroller 4, and carries out judging whether superpotential occurs.If be judged to be superpotential, then starting communication module 5, send data by the voltage signal that obtains of sampling through communication module 5(GPRS module) uploading data is to host computer (remote monitoring computing machine).
The every 0.1ms of microcontroller 4 starts primary voltage conversion, and stores data in the buffer zone of self.Just superpotential judgement is carried out to data after often gathering 0.02s.The data of data buffer up to 4800 16.
From accompanying drawing 3 and accompanying drawing 4; power supply is input as 220V AC power; the superpotential Intruding wave occurred in Lightning Over-voltage or electrical network is first prevented by the filtering of front end and protection circuit; and eliminate common mode interference and filtering high frequency harmonic components; again by transformer pressure-reducing to alternating voltage 6V; then respectively by uncontrollable rectification circuit, capacitor filter, two-way voltage stabilizing chip LM2596 obtains direct current 5V and 4.2V.Wherein 4.2V is as the power supply of GPRS module.5V voltage respectively through Switching Power Supply DY05D12-2W rise to ± 12V as the power supply of closed loop voltage Hall element HCV-10E, to rise to power supply that 12V exports as relay through Switching Power Supply DY05S12-1W, be down to the power supply of 3.3V as master control borad through LM1117-3.3 voltage stabilizing chip, supply microcontroller, communication module and LED run the uses such as instruction.The power supply of sampling A/D chip AD7606 is made up of 2.5V, 3.3V and 5V.2.5V voltage is wherein obtained through accurate voltage stabilizing chip ADR421 step-down by 3.3V.
As shown in Figure 6, MCU adopts the STM32F407VGT6 microcontroller of ST Microelectronics.This microcontroller has 32 bit CPUs, adopts Cortex-M4 kernel, 100 pins, the program storage of 1MB, and the static RAM (SRAM) of 192KB also has the back-up storage district of 4KB, the USART interface of 3 10.5Mb/s, the SPI of 3 37.5Mb/s.Be integrated with monocycle DSP instruction and FPU(floating point unit), support the calculating of complicated algorithm, be conducive to fast and process the voltage signal of sampling and obtaining.
Shown in accompanying drawing 1 and accompanying drawing 5, that sampling A/D chip 3 adopts is the AD7606 that 16 precision 8 Channel Synchronous are sampled.Switching rate is up to 200kSPs.In resonance overvoltage monitoring terminal of the present utility model, there are 4 tunnel sampling inputs, are connected to PT three-phase opening part (recording residual voltage) respectively, and the A phase of secondary side, B phase, C phase.Sampling A/D chip AD7606 and microcontroller 4 be mainly connected with data line and control line.Because this device adopts SPI serial communication mode, the data line that the DB7 of sampling A/D chip 3 is single with the SPI1_MISO of microcontroller 4 is connected, and SPI communication needs clock line, adopt the SPI1_SCK pin of microcontroller 4 to be connected with the SCK of sampling A/D chip 3, thus control the speed of the digital independent after AD conversion.The PC4 pin of microcontroller 4 is connected with CONVSTA with the CONVSTB pin of sampling A/D chip 3, controls to start AD conversion.The BUSY pin of sampling A/D chip 3, as the PC3 pin of external interrupt signal source access microcontroller 4, terminates for pointing out AD conversion.OS0 ~ the OS2 of sampling A/D chip 3 is over-sampling mode pins, can change the sampling rate of sampling A/D chip, thus realize the adjustment of sampling rate by configuring these three pins.The PA7 pin of microcontroller 4 connects the RESET pin of sampling A/D chip 3, can reset samples chip 3.In addition, by changing the level height of the RANGE pin access of sampling A/D chip 3, the measurement range of input voltage can also be changed.Such as: RANGE pin connects high level, then measurement range is-10V ~ 10V; Otherwise measurement range is-5V ~ 5V.
As shown in Figure 7, emerging ME3000 V2 during what communication module 5 adopted is.For the communication of monitoring device and remote monitoring computing machine.Microcontroller AT Command Set operation communication module 5.Set up TCP/IP link by the GPRS network of China Mobile, monitoring device can receive the control command from remote monitoring computing machine, comprises set threshold voltage, and voltage is called, pair time, and the function such as active upload voltage data.From accompanying drawing 1, accompanying drawing 6 and accompanying drawing 7, microcontroller 4 is realized by asynchronous serial communication with the data interaction of communication module 5, USART1_RX with USART1_TX of microcontroller is connected with TXD with RXD of GPRS module ME3000_V2 respectively, thus realizes the mutual of data.28 and 30 pins of GPRS module control incoming call respectively, carry out note pilot lamp LED3 and net control signal lamp LED2.Because LED3 high level is lighted, and receive note, the low level of 4-5s will be had, therefore LED3 extinguishes 4-5s.The PB3 outputs level signals of microcontroller amplifies the reset pin RESET of rear control GPRS module by triode 9014; Be connected with the ON/OFF pin of GPRS module by PB4 pin, control the opening and closing of communication module 5; PD7 pin is as the power supply V_MAIN break-make of the grid g input control GPRS module of Si4435 chip (P-MOSFET).In addition, the data traffic of communication module uses will pay, and this needs to be realized by SIM card.Therefore, GPRS module needs and SIM card realize information interaction.The V_CARD pin of GPRS module connects the VCC of SIM card as power supply; The RST pin that UIM_RST pin connects SIM card realizes reset function; UIM_CLK pin is as the CLK of the clock line connection SIM card of reading and writing data; UIM_DAT is as the DAT of the data line connection SIM card of two-way read-write.
What communication module 5 and remote monitoring computing machine carried out that the agreement of communication adopts is IEC60870-5-104 stipulations.Stipulations setting does not receive or sends any data more than 4s when any one party in communication two party, then send test frame and test communication link, just replys disconnecting link immediately reconnect if do not received.
To the superpotential determination methods of generation be: often gather 0.02s, the magnitude of voltage that sampling is obtained and the threshold comparison of setting.When there being 10 data to be greater than setting value, being judged to superpotential occurs, otherwise being then judged to be that voltage status is normal.When there is superpotential, send voltage data to remote monitoring computing machine immediately, content is superpotential the last fortnight phase waveform and rear 10 periodic waveforms.
As accompanying drawing 2, resonance overvoltage monitoring terminal B of the present utility model forms resonance overvoltage monitoring system to the remote monitoring computer A that corresponding monitoring and management software are housed.Functionally, remote monitoring computing machine obtains the information of each monitoring device by GPRS network, and resolves information, is presented on graphical interfaces.Staff just can set the voltage threshold of each monitoring terminal on supervisory control comuter, and voltage data uploaded by calling monitoring device, checks history voltage data, and display data waveform, derives the history waveform of voltage.
Use an example of the course of work of the utility model resonance overvoltage monitoring terminal as described below.
Monitoring device is sampled to input voltage with the frequency of 10kHz by voltage sample chip, microcontroller is delivered to by SPI universal serial bus, microcontroller judges the voltage data collected, if there occurs superpotential, then calling communication module, sends to remote monitoring computing machine by the packing of the voltage waveform data communication protocol in 12 cycles.Remote computer is resolved data, scales transforming, then exists in the database of self.And warning information is demonstrated on graphical interfaces, remind staff.If not there is superpotential, then judge whether the data receiving the transmission of remote monitoring computing machine, if received, then resolution data, and perform corresponding action by the content of data, as revised the voltage threshold etc. of this monitoring device.If supervisory control comuter calls survey data together to it, the data of called together survey are just packed according to stipulations by data concentrator, be sent to supervisory control comuter by GPRS network, after supervisory control comuter receives data, be stored in the database of self after Data Analysis, scales transforming are carried out to it.If do not receive any data that any remote monitoring computing machine sends, judge whether the time exceeding setting, exceed and namely send test frame, test link state.Now test acknowledgement frame responded by remote monitoring computing machine, confirms that communication link is normal.Staff can check history voltage data on supervisory control comuter, also can the long-range operation to monitoring device manually call simultaneously.
Be more than preferred embodiment of the present utility model, all changes done according to technical solutions of the utility model, when the function produced does not exceed the scope of technical solutions of the utility model, all belong to protection domain of the present utility model.

Claims (6)

1. a resonance overvoltage monitoring device, is characterized in that: comprising microcontroller, communication module, sampling A/D chip, voltage conversion circuit for sampled voltage signal for carrying out communicating with main website, being arranged at the front voltage mutual inductor on 10kV or 35kV bus and the power circuit for powering for whole device; Described microcontroller is connected to described sampling A/D chip by SPI serial communication interface, and is connected with described front voltage mutual inductor through this sampling A/D chip and voltage conversion circuit, and described microcontroller is also connected with described communication module by USART serial communication interface; Described power circuit comprises the filtration module, voltage reduction module, rectification module and the Voltage stabilizing module that connect successively, and the input end of described filtration module is connected to 220V AC power.
2. a kind of resonance overvoltage monitoring device according to claim 1, is characterized in that: described microcontroller adopts STM32F407VGT6 chip.
3. a kind of resonance overvoltage monitoring device according to claim 1, is characterized in that: described voltage conversion circuit comprises a closed loop Hall voltage sensor, and this closed loop Hall voltage sensor adopts HCV-10E.
4. a kind of resonance overvoltage monitoring device according to claim 1, is characterized in that: described sampling A/D chip adopts AD7606.
5. a kind of resonance overvoltage monitoring device according to claim 1, is characterized in that: described communication module is GPRS module, and this GPRS module adopts ME3000 V2.
6. a kind of resonance overvoltage monitoring device according to claim 1, it is characterized in that: described Voltage stabilizing module adopts two-way voltage stabilizing chip LM2596, DC voltage for being exported by described rectification module transfers 5V to and is used for the 4.2V direct voltage output for GPRS powers, wherein, 5V DC voltage is converted to 12V and 3.3V voltage through Switching Power Supply and 3.3V voltage stabilizing chip respectively.
CN201420724237.XU 2014-11-27 2014-11-27 A kind of resonance overvoltage monitoring device Active CN204203344U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420724237.XU CN204203344U (en) 2014-11-27 2014-11-27 A kind of resonance overvoltage monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420724237.XU CN204203344U (en) 2014-11-27 2014-11-27 A kind of resonance overvoltage monitoring device

Publications (1)

Publication Number Publication Date
CN204203344U true CN204203344U (en) 2015-03-11

Family

ID=52661289

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420724237.XU Active CN204203344U (en) 2014-11-27 2014-11-27 A kind of resonance overvoltage monitoring device

Country Status (1)

Country Link
CN (1) CN204203344U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108663566A (en) * 2017-04-01 2018-10-16 佛山市顺德区美的电热电器制造有限公司 The detection device and method of the resonance potential of electromagnetic induction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108663566A (en) * 2017-04-01 2018-10-16 佛山市顺德区美的电热电器制造有限公司 The detection device and method of the resonance potential of electromagnetic induction
CN108663566B (en) * 2017-04-01 2020-12-08 佛山市顺德区美的电热电器制造有限公司 Detection device and method for electromagnetic induction resonance voltage

Similar Documents

Publication Publication Date Title
CN104330612A (en) Resonant overvoltage monitoring system and method
CN2932397Y (en) Electric harmonic and interharmonic monitoring device
CN203445694U (en) Intelligent feeder terminal unit
CN103176066B (en) Digitalized electric energy quality monitoring device
CN202372592U (en) Electric energy quality monitoring instrument
CN204203344U (en) A kind of resonance overvoltage monitoring device
CN201311485Y (en) Ripple factor detecting device adapted to DC power supply
CN203632664U (en) Portable fault detector for remote power-collecting system equipment
CN204479682U (en) For the Fault Quick Diagnosis analyser of intensive DC de-icing device power cell
CN202494744U (en) Device for detecting quality of electric energy
CN203786221U (en) Energy efficiency data acquisition terminal possessing two RS485 interfaces
CN201813072U (en) Wireless sensor network measure and control device for prefabricated substations
CN208672718U (en) Power quality analysis device based on short-distance wireless communication technology
CN202794323U (en) Thunder monitoring system and thunder monitoring terminal
CN202586501U (en) Power intelligent monitoring device
CN104410270A (en) Power supply circuit used in field of explosion-proof weighing instrument
CN205693634U (en) Photovoltaic system monitoring contrast device
CN204030653U (en) There is the charging electric vehicle module of battery detection function
CN208109927U (en) A kind of electrical equipment malfunction data logging plant
CN203759913U (en) Low-voltage information collection simulated training device
CN203643536U (en) Distribution line power monitoring system
CN203720256U (en) Distributed load analyzer used for power distribution system unbalanced branch circuit
CN203572509U (en) Excitation voltage selectable vibrating wire reading collector
CN203166960U (en) Portable 1553B cable network test system
CN201527448U (en) Embedded power quality monitoring system

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model