CN202025032U - Electronic mutual inductor with on-line state monitoring - Google Patents

Electronic mutual inductor with on-line state monitoring Download PDF

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Publication number
CN202025032U
CN202025032U CN2010206900171U CN201020690017U CN202025032U CN 202025032 U CN202025032 U CN 202025032U CN 2010206900171 U CN2010206900171 U CN 2010206900171U CN 201020690017 U CN201020690017 U CN 201020690017U CN 202025032 U CN202025032 U CN 202025032U
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CN
China
Prior art keywords
signal
analog
mutual inductor
controller
circuit
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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.)
Expired - Fee Related
Application number
CN2010206900171U
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Chinese (zh)
Inventor
魏忠诚
文涛
方兵
刘立斌
崔新友
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WUHAN FIBERHOME ELECTRIC CO Ltd
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WUHAN FIBERHOME ELECTRIC CO Ltd
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Priority to CN2010206900171U priority Critical patent/CN202025032U/en
Application granted granted Critical
Publication of CN202025032U publication Critical patent/CN202025032U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model belongs to the field of power system current or voltage measuring technique, and relates to an electronic mutual inductor with the on-line state monitoring. The electronic mutual inductor includes a mutual inductor, a signal processing unit, an analog signal conditioning circuit, an analog to digital conversion circuit, a controller, and an optical port. An analog signal acquired by the mutual inductor is converted into a digital signal after passing the analog signal conditioning circuit and the analog to digital conversion circuit, and then the digital signal is transmitted into the controller. A signal outputted from the controller is converted into an optical signal after passing the optical port. The electronic mutual inductor also includes a humiture sensor, an analog-to-digital conversion reference level detection circuit, and an optical port state detection circuit. The digital signals outputted from the humiture sensor, the analog-to-digital conversion reference level detection circuit, and the optical port state detection circuit are transmitted into the controller. The controller controls the analog to digital conversion circuit and the humiture sensor, and outputs the received digital signals after packaging. The electronic mutual inductor with the on-line state monitoring carries out the self-state detection while completing the acquisition and transmission of the current signal or the voltage signal, thus providing an approach for the fault detection.

Description

The electronic mutual inductor that has on-line condition monitoring
Technical field
The utility model relates to a kind of signal processing unit that has on-line condition monitoring, relates in particular to a kind of electronic mutual inductor that the electric system curtage is measured that is applied to, and belongs to power domain.
Technical background
Intelligent grid be based on the advanced person the communication technology, sensor technology, infotech, with the information interaction between grid equipment be means, with realize power grid security, reliable, economical, energy-conservation be the advanced person's of purpose modern power industry system.From the notion of above intelligent grid as can be known, by various sensors the key equipment operation conditions of each links such as electric system generating, transmission of electricity, distribution, power supply is monitored and data integration in real time, obtain real time data, and various information interactions are provided, this is to realize the intelligentized most important means of electrical network.
Electronic mutual inductor is the crucial primary equipment of the core during intelligent grid is built.At present, in electric system, have the electronic mutual inductor of using in batches and be active electronic transformer, but the signal processing unit of active electronic transformer is made up of many electronic devices and components, and generally place the comparatively abominable outdoor high pressure side of environment, therefore the life-span of signal processing unit is subjected to the temperature of entire environment, the humidity factor restriction, crash rate is higher, but the at present domestic relevant producer that electronic mutual inductor is provided is all less than monitoring the humiture of its signal processing circuit unit change-over circuit key state and environment of living in, assessment after more effectively not losing efficacy, also can't collect evidence, in manufacturing process, the circuit elements device is carried out strict screening and control and just adopt, lack real-time online status monitoring like this, be unfavorable for the visual construction of intelligent grid the nucleus equipment key position.
The utility model content
In order to overcome the deficiency of the above existing electronic mutual inductor, the utility model provides a kind of electronic mutual inductor that can carry out status monitoring to mutual inductor.The technical solution of the utility model is as follows:
A kind of electronic mutual inductor that has on-line condition monitoring, comprise mutual inductor and signal processing unit, the analog signal conditioner circuit, analog to digital conversion circuit, controller and Guang Kou, simulating signal by the mutual inductor collection is passed through the analog signal conditioner circuit successively, analog to digital conversion circuit is admitted to controller after converting digital signal to, the signal of controller output is converted into light signal through the light mouth, described electronic mutual inductor also comprises Temperature Humidity Sensor, analog to digital conversion reference level detection circuit, light mouth state detection circuit, described Temperature Humidity Sensor, analog to digital conversion reference level detection circuit, the digital signal of light mouth state detection circuit output is admitted to controller, by described controller to analog to digital conversion circuit with Temperature Humidity Sensor is controlled and the digital signal packing back output that will receive.
Preferably, the electronic mutual inductor that has on-line condition monitoring of the present utility model, described controller are a CPLD or a field programmable gate array.
The utility model is a digital signal with the analog signal conversion of electronic mutual inductor input, detection chip detects closing key level and optical device (light mouth) state simultaneously, humiture around the harvester sends to secondary device with signal and humiture packing data by optical fiber; The maximum power dissipation of whole device is no more than 100mW.The utility model has also carried out the oneself state monitoring when finishing curtage signals collecting and transmission, for fault pre-alarming and fault detect provide a kind of approach.
Description of drawings
Fig. 1 is the position view of the utility model at electronic mutual inductor and signal processing unit.Wherein 1 is signal processing unit placement location in the electronic current mutual inductor, and 2 is signal processing unit placement location in the electronic type voltage transformer, and 3 is the fiber-optic output mouth that links to each other with secondary device.
Fig. 2 is a functional schematic block diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Referring to Fig. 1, signal processing unit is installed in the appropriate location of electronic mutual inductor.If current transformer then is installed in the mutual inductor cylinder top shown in 1, by inductive coil and the compound energy of getting of laser instrument, optical fiber is drawn from the lower end by cylinder; If voltage transformer (VT) then is installed in the mutual inductor cylinder bottom shown in 2, getting by the 220V power-frequency voltage can; If combined electrical minor mutual inductor then is installed in position shown in 1 and 2 respectively, energy supply respectively.3 is secondary side equipment, with mutual inductor by optical fiber communication.
Its high-side signal processing unit comprises analog to digital conversion reference level detection circuit, light mouth state detection circuit, Temperature Humidity Sensor, can carry out real-time state monitoring to pass key level, Primary Component and the residing ambient temperature and humidity of signal processing unit, for the follow-up failure of removal reason of signal processing unit is analyzed and assessment provides rational effective evidences.
The electronic mutual inductor signal processing unit will be imported simulating signal through the simulated modulation circuit, make it to meet the conversion range of modulus conversion chip; Control the work of modulus conversion chip and the digital signal after the reception conversion by CPLD (CPLD) or field programmable gate array (FPGA); Processing unit comprises super low-power consumption level detection chip and detects closing key level and optical device state, also controls the work of a temperature and humidity sensing chip simultaneously by CPLD or FPGA, and receives the humiture data of gathering; CPLD or FPGA are packaged into a circuit-switched data with this two paths of data, and carry out CRC check, then packet are sent with FT3 protocol format or serial communication protocol.Secondary device is the working environment that actual value can be judged the current demand signal processing unit with information revertings such as reference level, light mouth state, humitures after receiving data.Signal processing unit all adopts the super low-power consumption electron device, and the duty of reasonable control circuit, guarantees the low-power consumption work of signal processing unit.
In embodiment as shown in Figure 2, the electronic mutual inductor sensing head is partly imported the simulation small-signal, analog signal conditioner part of the present utility model is adjusted to the peak value scope of input signal in the conversion range of modulus conversion chip, compound with reference voltage then, signal level is raised to positive voltage is input in the modulus conversion chip.By CPLD (CPLD) or field programmable gate array (FPGA) are programmed, the operate as normal of control modulus conversion chip, and receive the digital signal of modulus conversion chip output and be stored in CPLD or the register of FPGA in, processing unit comprises super low-power consumption level detection chip and detects closing key level and optical device state, pass through simultaneously CPLD or FPGA are programmed with the control moisture temperature sensing chip, and the digital signal of receiving chip output.The frequency acquisition of modulus conversion chip, pass key level and optical device state detection circuit and temperature and humidity sensing chip is adjustable by CPLD or FPGA programming.In CPLD or FPGA, two ways of digital signals is merged into data, carries out merging into a packet after the CRC check, and be sent to secondary device by optical fiber.

Claims (2)

1. electronic mutual inductor that has on-line condition monitoring, comprise mutual inductor and signal processing unit, the analog signal conditioner circuit, analog to digital conversion circuit, controller and Guang Kou, simulating signal by the mutual inductor collection is passed through the analog signal conditioner circuit successively, analog to digital conversion circuit is admitted to controller after converting digital signal to, the signal of controller output is converted into light signal through the light mouth, it is characterized in that, described electronic mutual inductor also comprises Temperature Humidity Sensor, analog to digital conversion reference level detection circuit, light mouth state detection circuit, described Temperature Humidity Sensor, analog to digital conversion reference level detection circuit, the digital signal of light mouth state detection circuit output is admitted to controller, by described controller to analog to digital conversion circuit with Temperature Humidity Sensor is controlled and the digital signal packing back output that will receive.
2. the electronic mutual inductor that has on-line condition monitoring according to claim 1 is characterized in that: described controller is a CPLD or a field programmable gate array.
CN2010206900171U 2011-06-24 2011-06-24 Electronic mutual inductor with on-line state monitoring Expired - Fee Related CN202025032U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206900171U CN202025032U (en) 2011-06-24 2011-06-24 Electronic mutual inductor with on-line state monitoring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206900171U CN202025032U (en) 2011-06-24 2011-06-24 Electronic mutual inductor with on-line state monitoring

Publications (1)

Publication Number Publication Date
CN202025032U true CN202025032U (en) 2011-11-02

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102914690A (en) * 2012-10-09 2013-02-06 中国电力科学研究院 High-speed and high-precision data acquisition system with ultralow power consumption
CN103063907A (en) * 2012-12-26 2013-04-24 武汉烽火富华电气有限责任公司 Electronic type voltage transformer signal collection system
CN103513082A (en) * 2013-09-10 2014-01-15 中国电力科学研究院 Electronic type mutual inductor with error on-line monitoring function
CN104215929A (en) * 2014-09-25 2014-12-17 国家电网公司 Electronic transformer status monitor system
CN104931099A (en) * 2015-06-12 2015-09-23 国家电网公司 Environmental monitoring device and method of electronic transformer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102914690A (en) * 2012-10-09 2013-02-06 中国电力科学研究院 High-speed and high-precision data acquisition system with ultralow power consumption
CN103063907A (en) * 2012-12-26 2013-04-24 武汉烽火富华电气有限责任公司 Electronic type voltage transformer signal collection system
CN103063907B (en) * 2012-12-26 2016-02-17 武汉烽火富华电气有限责任公司 A kind of electronic type voltage transformer signal collection system
CN103513082A (en) * 2013-09-10 2014-01-15 中国电力科学研究院 Electronic type mutual inductor with error on-line monitoring function
CN104215929A (en) * 2014-09-25 2014-12-17 国家电网公司 Electronic transformer status monitor system
CN104931099A (en) * 2015-06-12 2015-09-23 国家电网公司 Environmental monitoring device and method of electronic transformer

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111102

Termination date: 20180624

CF01 Termination of patent right due to non-payment of annual fee