CN208861171U - The circuit structure of synchronous acquisition protective device whole phasor - Google Patents
The circuit structure of synchronous acquisition protective device whole phasor Download PDFInfo
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- CN208861171U CN208861171U CN201821837655.4U CN201821837655U CN208861171U CN 208861171 U CN208861171 U CN 208861171U CN 201821837655 U CN201821837655 U CN 201821837655U CN 208861171 U CN208861171 U CN 208861171U
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Abstract
The utility model discloses a kind of circuit structures of synchronous acquisition protective device whole phasor; including DSP digital signal processor, modulus conversion chip, measurement acquisition conversion module and power supply module; the output end of the measurement acquisition conversion module is connected to the input terminal of DSP digital signal processor by modulus conversion chip; it is also connected with voltage comparison frequency measurement module between the measurement acquisition conversion module and the DSP digital signal processor, the DSP digital signal processor, modulus conversion chip and voltage comparison frequency measurement module are connect with power supply module.Circuit structure in the utility model using synchronous acquisition protective device whole phasor can overcome the problems, such as that measurement can not be synchronized to its whole electrical quantity in the analysis work of electric system protection device working condition measuring; accurate data are provided to subsequent analysis work, avoid the case where test can not draw a conclusion repeatedly.
Description
Technical field
The utility model relates to power system of data acquisition technical fields, and in particular to a kind of synchronous acquisition protective device is complete
The circuit structure of portion's phasor.
Background technique
In relay protection of power system professional work, it is often necessary to measure, analyze phasor relation between electrical quantity, to sentence
Whether disconnected protective device working condition and external circuit wiring are correct.It is limited by equipment technology level, current domestic and international professional people
The method that member uses is measured electrical quantity to be measured one by one or measures in batches referring to Fig. 1, Fig. 2, will finally be measured
Data carry out integration carry out analysis draw a conclusion, this method be for relative constant load can complete test appoint
Business.But it is understood that the load of electric system is in variation forever.Due to being to measure one by one or in batches, from measurement the
One electrical quantity starts to a last electrical quantities measurement to finish often beyond 10 minutes, the system when measuring the last one electrical quantity
System trend may lead to not accurate analytical equipment operating condition, such as load variations larger impact so that larger change has had occurred
Measurement result can only just resurvey, or even occur to complete measurement task power grid and be forced to change the complex situations such as the method for operation.
It can only draw a conclusion by rule of thumb by professional in extreme circumstances, this may give the safe and stable operation band of electric system
Carry out human risks.
Utility model content
The purpose of this utility model is to provide a kind of circuit structures of synchronous acquisition protective device whole phasor, solve existing
Measurement to electric system protection device electrical quantity is to measure one by one or in batches, whole electrical quantity can not be synchronized survey
The problem of amount.
In order to solve the above technical problems, the utility model uses following technical scheme:
A kind of circuit structure of synchronous acquisition protective device whole phasor, including DSP digital signal processor, analog-to-digital conversion
The output end of chip, measurement acquisition conversion module and power supply module, the measurement acquisition conversion module passes through modulus conversion chip
Be connected to the input terminal of DSP digital signal processor, the measurement acquisition conversion module and the DSP digital signal processor it
Between be also connected with voltage comparison frequency measurement module, the DSP digital signal processor, modulus conversion chip and voltage compare frequency
Rate measurement module is connect with power supply module.
Preferably, the modulus conversion chip is also connect with the voltage reference chip for providing analog to digital conversion reference voltage,
The voltage reference chip connects power supply module.
Preferably, the power supply module includes high precision electro source module, lithium ion battery management special chip, large capacity
Lithium ion battery and charging adapter, the high precision electro source module, charging adapter and high capacity lithium ion battery are all connected with
Lithium ion battery manages special chip, and the DSP digital signal processor, modulus conversion chip, voltage comparison frequency measure mould
Block and voltage reference chip are connected with the high precision electro source module.
Preferably, the man-machine interface being also connected in the DSP digital signal processor for showing processing result is touched
Liquid crystal display is controlled, the man-machine interface touch liquid crystal screen is connect with lithium ion battery management special chip for powering.
It selects chip preferably, being also connected with piece between the modulus conversion chip and DSP digital signal processor and answers
Position chip, described is selected chip using extensive logic gate chip CPLD XC9536.
Preferably, being also connected with the emulation interface for emulation in the DSP digital signal processor, for debugging
Debugging interface and USB interface.
Compared with prior art, the utility model has the beneficial effects that
Power train blanket insurance can be overcome using the circuit structure of synchronous acquisition protective device whole phasor in the utility model
The problem of measurement can not be synchronized to its whole electrical quantity in the analysis work of protection unit working condition measuring, the circuit of the utility model
Structure, no matter how system loading, direction of tide change, access what class power supply, the test jobs of all electrical quantity can synchronization,
Continuously, situation lower moment completes in real time, provides accurate data to subsequent analysis work, and avoiding test repeatedly can not obtain
Out the case where conclusion, it reduces and needs to change system operation mode and could complete the probability of test.
Detailed description of the invention
Fig. 1 is that existing single deck tape-recorder single deck tape-recorder clamps instrumentation plan one by one in the utility model.
Fig. 2 is existing more clamp instrumentation plan in batches in the utility model.
Fig. 3 is the measurement structural representation of the circuit structure in the utility model.
Fig. 4 is the structural schematic diagram of the circuit structure in the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Referring to fig. 4, for one embodiment of the utility model, a kind of circuit of synchronous acquisition protective device whole phasor
Structure, including DSP digital signal processor, modulus conversion chip, measurement acquisition conversion module and power supply module, the measurement are adopted
The output end of set transformation module is connected to the input terminal of DSP digital signal processor by modulus conversion chip, and the measurement is adopted
Voltage comparison frequency measurement module, the DSP number are also connected between set transformation module and the DSP digital signal processor
Signal processor, modulus conversion chip and voltage comparison frequency measurement module are connect with power supply module, for entire circuit
It is powered.In the present embodiment, using TMS320F28335 dominant frequency 150MHz(6.67ns cycle time), Harvard bus architecture,
32 floating-point operation DSP digital signal processor use AD7606 chip as signal processing core chips, modulus conversion chip,
Measurement acquisition conversion module is the pincerlike AC current sensor of multiple openings, uses 28 openings as shown in Figure 3 in the present embodiment
Pincerlike AC current sensor, and the electricity that voltage lead and 28 pincerlike AC current sensors that are open use protective device
Pressure amount, magnitude of current acquisition enter device, and in the device again by voltage changer, sampling resistor respectively by the exchange of 100V
Voltage, 0-10A ac flow be converted to the ac voltage signal within 5V, then the ac voltage signal is conveyed to
Analog to digital conversion chip AD7606 is input in DSP digital signal processor after digital quantity to reality by the chip analog to digital conversion
The synchro measure of existing 32 road of acs；The electrical data on 32 tunnel Yao Jiang is converted in the present embodiment, every analog-to-digital conversion core
Piece AD7606 can convert 8 circuit-switched datas, therefore the conversion of 23 tunnel electrical datas needs to turn using 4 high-precision 16 moduluses
Chip AD7606 is changed, the sample rate of the chip is 200k, and the core Embedded second order frequency overlapped-resistable filter, tracking are kept
Amplifier, digital filter, 2.5V reference voltage source and buffering, high speed serialization and parallel interface, and support really ± 10V or ±
The bipolar signal of 5V inputs；Also connect between measurement acquisition conversion module and the DSP digital signal processor in the present embodiment
It is connected to voltage comparison frequency measurement module, which uses high speed voltage comparable chip MAX961ESA,
For carrying out tracking measurement to power grid real-time frequency.It is to be attached using each module chip in the present embodiment, for chip
The specific requirement that need to be used according to chip of connection type, can be illustrated with the use of reference chip and the mode of connection, herein no longer
It repeats.
Power train blanket insurance can be overcome using the circuit structure of synchronous acquisition protective device whole phasor in the utility model
The problem of measurement can not be synchronized to its whole electrical quantity in the analysis work of protection unit working condition measuring, the circuit of the utility model
Structure, no matter how system loading, direction of tide change, access what class power supply, the test jobs of all electrical quantity can synchronization,
Continuously, situation lower moment completes in real time, provides accurate data to subsequent analysis work, and avoiding test repeatedly can not obtain
Out the case where conclusion, it reduces and needs to change system operation mode and could complete the probability of test.
Further, for another embodiment of the utility model, the modulus conversion chip also becomes with offer modulus
The voltage reference chip connection of reference voltage is changed, the voltage reference chip connects power supply module.Use voltage reference chip energy
Enough stablize it and analog to digital conversion reference voltage is provided, which uses high-precision voltage reference chip ADR421, electricity
The input for pressing fiducial chip is 5V, is exported as 2.5V.
Further, for another embodiment of the utility model, the power supply module include high precision electro source module,
Lithium ion battery manages special chip, high capacity lithium ion battery and charging adapter, and the high precision electro source module, charging are suitable
Orchestration and high capacity lithium ion battery are all connected with lithium ion battery management special chip, the DSP digital signal processor, modulus
Conversion chip, voltage comparison frequency measurement module and voltage reference chip are connected with the high precision electro source module.This reality
It applies in example, needs to be powered for whole device, it is therefore desirable to the participation of power supply module；Large capacity is used in the power supply module
Lithium ion battery, special chip is managed by lithium ion battery, lithium ion battery is managed, and pass through high-precision power
Module is converted after voltage as DSP digital signal processor, modulus conversion chip, voltage comparison frequency measurement module and voltage reference
Chip is powered.
Further, it for another embodiment of the utility model, is also connected in the DSP digital signal processor
For showing the man-machine interface touch liquid crystal screen of processing result, the man-machine interface touch liquid crystal screen and the lithium ion battery pipe
Special chip connection is managed for powering.In the present embodiment, the processing result of DSP digital signal processor is shown for convenience
Show, therefore connect man-machine interface touch liquid crystal screen in DSP digital signal processor, facilitates human-computer interaction.
Further, for another embodiment of the utility model, at the modulus conversion chip and DSP digital signal
It is also connected with piece between reason device and selects chip and reset chip, described is selected chip using extensive logic gate chip CPLD
XC9536.In the present embodiment, extensive logic gate chip CPLD XC9536 mainly completes the choosing of total system piece, sequential coupling；It resets
Chip is mainly used for initialization and reset to device.
Further, it for another embodiment of the utility model, is also connected in the DSP digital signal processor
Emulation interface for emulation, the debugging interface for debugging and USB interface.In the present embodiment, setting emulation interface, debugging
Interface facilitates program downloading debugging, debugging interface completion is connect with portable other equipment, USB interface for emulating and debugging
Facilitate importing and exporting for data.
Working principle of the utility model is: electric current, voltage transformer input signal change after high precision sampling resistance
For voltage signal, modulus variation is carried out into mode conversion AD7606 chip, voltage comparison unit calculates mains frequency, according to frequency
Rate calculates the break period, and the adjustment sampling interval starts Interruption, and 32 tunnel sampled datas are read in DSP digital signal processor timing
To obtain sampled data.The stable reference voltage that voltage reference chip stablizes offer mode conversion gives analog-to-digital conversion AD7606 core
Piece, 3.3V, 1.8V, 12V working power of power module output device needs can simultaneously filter, and piece selects chip using extensive logic
Door chip CPLD XC9536, provides peripheral hardware chip slapper and timing is selected to address, lithium battery administrative unit and offer lithium battery group charge and discharge
And electric quantity accumulation calculates, Current Voltage and temperature monitoring.Emulation interface facilitate program downloading debugging, debugging interface complete with it is portable
The connection of formula other equipment, facilitates importing and exporting for data, man-machine interface touch liquid crystal complete man-machine interface information processing show and
Control.
" one embodiment ", " another embodiment ", " embodiment ", " preferred implementation spoken of in the present specification
Example " etc., referring to combining specific features, structure or the feature of embodiment description includes describing extremely in the application generality
In few one embodiment.It is not centainly to refer to the same embodiment that statement of the same race, which occur, in multiple places in the description.Into one
For step, when describing a specific features, structure or feature in conjunction with any embodiment, what is advocated is to combine other implementations
Example realizes that this feature, structure or feature are also fallen in the scope of the utility model.
Although reference be made herein to the utility model is described in multiple explanatory embodiments of the utility model, still,
It should be understood that those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations
It will fall within scope and spirit disclosed in the present application.More specifically, it discloses in the application, drawings and claims
In range, can building block to theme combination layout and/or layout carry out a variety of variations and modifications.In addition to building block
And/or outside the modification and improvement of layout progress, to those skilled in the art, other purposes also be will be apparent.
Claims (6)
1. a kind of circuit structure of synchronous acquisition protective device whole phasor, it is characterised in that: including DSP Digital Signal Processing
Device, modulus conversion chip, measurement acquisition conversion module and power supply module,
The output end of the measurement acquisition conversion module is connected to the input of DSP digital signal processor by modulus conversion chip
End is also connected with voltage comparison frequency measurement mould between the measurement acquisition conversion module and the DSP digital signal processor
Block,
The DSP digital signal processor, modulus conversion chip and voltage comparison frequency measurement module are connect with power supply module.
2. the circuit structure of synchronous acquisition protective device whole phasor according to claim 1, it is characterised in that: the mould
Number conversion chip is also connect with the voltage reference chip for providing analog to digital conversion reference voltage, the voltage reference chip connection power supply
Module.
3. the circuit structure of synchronous acquisition protective device whole phasor according to claim 2, it is characterised in that: the confession
Electric module includes high precision electro source module, lithium ion battery management special chip, high capacity lithium ion battery and charging adapter,
The high precision electro source module, charging adapter and high capacity lithium ion battery are all connected with lithium ion battery management special chip,
The DSP digital signal processor, modulus conversion chip, voltage comparison frequency measurement module and voltage reference chip with it is described
High precision electro source module is connected.
4. the circuit structure of synchronous acquisition protective device whole phasor according to claim 3, it is characterised in that: described
The man-machine interface touch liquid crystal screen for showing processing result, the man-machine interface are also connected in DSP digital signal processor
Touch liquid crystal screen is connect with lithium ion battery management special chip for powering.
5. the circuit structure of synchronous acquisition protective device whole phasor according to claim 1, it is characterised in that: the mould
Piece is also connected between number conversion chip and DSP digital signal processor and selects chip and reset chip, and described is selected chip to use
Extensive logic gate chip CPLD XC9536.
6. the circuit structure of synchronous acquisition protective device whole phasor according to claim 1, it is characterised in that: described
The emulation interface for emulation, the debugging interface for debugging and USB interface are also connected in DSP digital signal processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821837655.4U CN208861171U (en) | 2018-11-08 | 2018-11-08 | The circuit structure of synchronous acquisition protective device whole phasor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821837655.4U CN208861171U (en) | 2018-11-08 | 2018-11-08 | The circuit structure of synchronous acquisition protective device whole phasor |
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| CN208861171U true CN208861171U (en) | 2019-05-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342866A (en) * | 2018-11-29 | 2019-02-15 | 云南电网有限责任公司昆明供电局 | Synchronous acquisition protective device whole phasor judges the device and method of protective device wiring correctness |
| CN110554308A (en) * | 2019-09-02 | 2019-12-10 | 云南电网有限责任公司昆明供电局 | Characteristic analyzer for electric operating mechanism of isolating switch |
| WO2024045904A1 (en) * | 2022-08-31 | 2024-03-07 | 云南电网有限责任公司昆明供电局 | Hydraulic disc spring moisture-proof box and automatic circuit breaker pressure signal measurement apparatus |
-
2018
- 2018-11-08 CN CN201821837655.4U patent/CN208861171U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342866A (en) * | 2018-11-29 | 2019-02-15 | 云南电网有限责任公司昆明供电局 | Synchronous acquisition protective device whole phasor judges the device and method of protective device wiring correctness |
| CN110554308A (en) * | 2019-09-02 | 2019-12-10 | 云南电网有限责任公司昆明供电局 | Characteristic analyzer for electric operating mechanism of isolating switch |
| WO2024045904A1 (en) * | 2022-08-31 | 2024-03-07 | 云南电网有限责任公司昆明供电局 | Hydraulic disc spring moisture-proof box and automatic circuit breaker pressure signal measurement apparatus |
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