CN206832879U - Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality - Google Patents

Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality Download PDF

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Publication number
CN206832879U
CN206832879U CN201720672645.9U CN201720672645U CN206832879U CN 206832879 U CN206832879 U CN 206832879U CN 201720672645 U CN201720672645 U CN 201720672645U CN 206832879 U CN206832879 U CN 206832879U
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China
Prior art keywords
circuit
sampling
measurement
current
protection
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CN201720672645.9U
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Chinese (zh)
Inventor
黎洪光
陈文炜
郑欣
郭铭海
王雪锋
林亚培
周仕杰
张森华
邓泽荣
孙淼
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Guangzhou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Guangzhou Power Supply Bureau Co Ltd
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Priority to CN201720672645.9U priority Critical patent/CN206832879U/en
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Abstract

The utility model discloses a kind of mast switch controller current measurement circuit for possessing sampling channel handoff functionality,Including handover module,Protection with and measurement current sampling circuit,Core control panel and analog to digital conversion circuit,Current Transformer Secondary side on the input termination power circuit of handover module,Two output ends of handover module connect the input of protection use and measurement current sampling circuit respectively,The switch-over control signal output end of the control termination core control panel of handover module,Protection is used and the output end of measurement current sampling circuit is connected with the input of analog to digital conversion circuit respectively,Protection is connected with sampling control signal output end of the controlling of sampling end of circuit sample circuit and measurement current sampling circuit respectively with core control panel,The input of the output termination core control panel of analog to digital conversion circuit,Protection circuit sample circuit is used for electric current during sample power line short,Measurement current sampling circuit is used for electric current during sample power circuit normal work.

Description

Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality
Technical field
The utility model belongs to electric field, more particularly to a kind of on-pole switch control for possessing sampling channel handoff functionality Device current measurement circuit processed.
Background technology
The circuit that on-pole switch is mounted in supply line cut-offs kind equipment.Mast switch controller is according to artificially providing Instruction send control signal control on-pole switch disjunction or connect circuit, and need complete measurement circuitry on electric current work( Energy.Electric current on circuit is larger, it is necessary to which the current transformer installed on the line is transformed to low current again by pole-mounted switch Device measures.Size of current when mast switch controller one side is to supply line's normal work is monitored, the opposing party Face is judged with the presence or absence of short circuit on circuit, further according to pre- by the way that whether the electric current on alternative route exceedes artificial default threshold value If logical scheme sends the signal of corresponding control on-pole switch.Therefore whether switch controller current measurement circuit can be accurate Electric current in true ground measurement circuitry is particularly significant.
Electric current during due to power line short-circuit is far longer than electric current during normal work, causes mast switch controller Current measurement circuit needs to ensure measurement accuracy in very big current range, and this causes the conceptual design and element of measuring circuit Type selecting is very difficult, also causes the performance of element need to be very excellent, so as to bring very high cost.
Existing solution in supply line mainly by installing two groups of high-tension current inductors, in on-pole switch Two current measurement circuits are also installed in controller to dock respectively therewith, one of current measurement circuit is according to small current measurement Circuit parameter design, when current is excessive, the measurement result of the circuit is given up, another current measurement circuit is according to big electricity The circuit parameter design of flow measurement, when electric current is smaller, the measurement result of the circuit is given up.No matter such solution supplies Electric line has a current measurement circuit to be in the state wasted, the especially higher height of price normally or in the presence of short circuit The waste of voltage current transformer brings the high cost of solution.
The content of the invention
The purpose of this utility model is to provide a kind of mast switch controller electric current for possessing sampling channel handoff functionality Measuring circuit is solving the above problems.
To achieve the above object, the technical solution adopted in the utility model is:On the post for possessing sampling channel handoff functionality Switch controller current measurement circuit, including handover module, protection circuit sample circuit, measurement current sampling circuit, core Heart control panel and analog to digital conversion circuit, the input of the handover module terminate the Current Transformer Secondary side on power circuit, institute Two output ends for stating handover module connect the input of protection circuit sample circuit and measurement current sampling circuit respectively, described Circuit sample circuit and measurement are used in the switch-over control signal output end of the control termination core control panel of handover module, the protection Be connected respectively with the input of analog to digital conversion circuit with the output end of current sampling circuit, the protection with circuit sample circuit and The controlling of sampling end of measurement current sampling circuit is connected with the sampling control signal output end of core control panel respectively, the mould The input of the output termination core control panel of number change-over circuit, the protection are used for sample power circuit with circuit sample circuit Electric current when short-circuit, measurement current sampling circuit are used for electric current during sample power circuit normal work.
Further, the handover module includes the first electronic switch and the second electronic switch, first electronic switch Connect the Current Transformer Secondary side on power circuit, first electronic switch and respectively with the input of the second electronic switch The output end of two electronic switches connects the input of protection circuit sample circuit and measurement current sampling circuit respectively, and described The control terminal of one electronic switch and the second electronic switch connects the switch-over control signal output end of core control panel respectively.
Further, first electronic switch and the second electronic switch are relay.
Further, first electronic switch and the second electronic switch are metal-oxide-semiconductor or triode.
Further, the core control panel is realized by single-chip microcomputer, MCU microprocessors or PLC.
Further, the protection circuit sample circuit and measurement current sampling circuit include becoming current signal It is changed to the circuit of voltage signal analog quantity and the electricity sampled in the presence of sampling control signal to voltage signal analog quantity Road.
Further, analog-digital conversion circuit as described is realized by model ADC0809 chip.
Advantageous effects of the present utility model:
The measurement range that the utility model is directed to circuit sample circuit and measurement with current sampling circuit due to protection is all Less, so reducing the difficulty in circuit arrangement design and element selection, and it is mutual to configure two high-tension currents Sensor, greatly reduces cost, and simple installation, small volume, and energy consumption is low.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model specific embodiment.
Embodiment
The utility model is further illustrated in conjunction with the drawings and specific embodiments.
As shown in figure 1, possess the mast switch controller current measurement circuit of sampling channel handoff functionality, including switching mould Current sampling circuit 3, core control panel 5 and analog to digital conversion circuit 6 are used in block 2, protection circuit sample circuit 4, measurement.
Current Transformer Secondary side 1 on the input termination power circuit of the handover module 2, the handover module 2 Two output ends connect the input of protection circuit sample circuit 4 and measurement current sampling circuit 3, the handover module 2 respectively Control termination core control panel 5 switch-over control signal output end, the protection is with circuit sample circuit 4 and measurement electric current Input of the output end of sample circuit 3 respectively with analog to digital conversion circuit 6 is connected, and the protection is with circuit sample circuit 4 and surveys Amount is connected with the sampling control signal output end of core control panel 5 respectively with the controlling of sampling end of current sampling circuit 3, the mould The input of the output termination core control panel 5 of number change-over circuit 6, the protection are larger according to measuring with circuit sample circuit 4 The parameter of electric current is configured, and electric current during for sample power line short, the measurement is with current sampling circuit 3 according to survey The parameter of amount smaller current is configured, electric current during for sample power circuit normal work.
In this specific embodiment, the handover module 2 includes the first electronic switch 21 and the second electronic switch 22, and described The input of one electronic switch 21 and the second electronic switch 22 connects the Current Transformer Secondary side 1 on power circuit respectively, described The output end of first electronic switch 21 and the second electronic switch 22 connects protection and adopted with circuit sample circuit 4 and measurement with electric current respectively The input of sample circuit 3, the control terminal of the electronic switch 22 of the first electronic switch 21 and second connect core control panel 5 respectively Two switch-over control signal output ends.
In this specific embodiment, the electronic switch 22 of the first electronic switch 21 and second is relay.Certainly, at it In its embodiment, the electronic switch 22 of the first electronic switch 21 and second can be MOS pipes or triode etc..This is this What art personnel can realize easily, no longer describe in detail.
In this specific embodiment, the second electronic switch 22 is arranged to normally closed, so that coming from Current Transformer Secondary side 1 Current signal acquiescence enter from measurement current sampling circuit 3
In this specific embodiment, the core control panel 5 can be by single-chip microcomputer, MCU microprocessors or PLC Lai real It is existing.This is that those skilled in the art can realize easily, is no longer described in detail.
In this specific embodiment, the protection is included electricity with circuit sample circuit 4 and measurement current sampling circuit 3 Stream signal is transformed to the circuit of voltage signal analog quantity and voltage is believed in the presence of the sampling control signal of core control panel 5 The circuit that number analog quantity is sampled.Current signal is transformed to the circuit of voltage signal analog quantity and to voltage signal analog quantity The circuit sampled uses existing circuit, and this is that those skilled in the art can realize easily, is no longer described in detail.
In this specific embodiment, analog-digital conversion circuit as described 6 is realized by model ADC0809 chip, certainly, at it In its embodiment, analog to digital conversion circuit 6 can also use existing other analog to digital conversion circuits, and this is that those skilled in the art can With what is realized easily, no longer describe in detail.
The course of work:During power circuit normal work, core control panel 5 controls the second electronic switch 22 to turn on, the first electricity Sub switch 21 is turned off, and the line current that current transformer measures is entered by its secondary side 1 by the second electronic switch 22 to be surveyed Amount current sampling circuit 3, the sampling that measurement is provided with current sampling circuit 3 according to the controlling of sampling end of core control panel 5 are believed Number electric current is sampled, obtain sampling analog quantity, and sampling analog quantity is transferred into analog to digital conversion circuit 6, analog-to-digital conversion electricity Road 6 is converted into being transferred to core control panel 5 after digital quantity by analog quantity is sampled, and core control panel 5 is received from analog-to-digital conversion electricity The digital quantity on road 6 simultaneously converts thereof into measurement result, and judges whether the size of measurement result exceedes preset value, works as measurement result During less than preset value, continue to output signal and control the second electronic switch 22 to turn on, turn off the first electronic switch 21, work as measurement result During more than preset value, output signal controls the second electronic switch 22 to turn off, and the first electronic switch 21 turns on, current transformer measurement The line current arrived enters protection current sampling circuit 4, protection electric current by its secondary side 1 by the first electronic switch 21 The sampled signal that sample circuit 4 provides according to the controlling of sampling end of core control panel 5 samples to electric current, obtains sampling simulation Amount, and sampling analog quantity is transferred into analog to digital conversion circuit 6, analog to digital conversion circuit 6 will be sampled after analog quantity is converted into digital quantity Core control panel 5 is transferred to, core control panel 5 receives the digital quantity from analog to digital conversion circuit 6 and converts thereof into measurement knot Fruit, and judge whether the size of measurement result exceedes preset value, when measurement result is less than preset value, continue to output signal control Second electronic switch 22 turns on, and turns off the first electronic switch 21, when measurement result exceedes preset value, output signal control second Electronic switch 22 turns off, and the first electronic switch 21 turns on.
The measurement range that the utility model is directed to due to protection circuit sample circuit 4 and measurement current sampling circuit 3 All less, so reducing the difficulty in circuit arrangement design and element selection, and two high-tension currents need not be configured Transformer, greatly reduces cost, and simple installation, and energy consumption is low.
Although specifically showing and describing the utility model with reference to preferred embodiment, those skilled in the art should This is understood, is not departing from the spirit and scope of the present utility model that appended claims are limited, in form and details On the utility model can be made a variety of changes, be the scope of protection of the utility model.

Claims (7)

1. possess the mast switch controller current measurement circuit of sampling channel handoff functionality, it is characterised in that:Including switching mould Current sampling circuit, core control panel and analog to digital conversion circuit, the switching mould are used in block, protection circuit sample circuit, measurement Current Transformer Secondary side on the input termination power circuit of block, two output ends of the handover module connect protection electricity consumption respectively The input of road sample circuit and measurement current sampling circuit, the switching of the control termination core control panel of the handover module Control signal output, the protection are turned with modulus respectively with the output end of circuit sample circuit and measurement current sampling circuit The input connection of circuit is changed, the protection is distinguished with the controlling of sampling end of circuit sample circuit and measurement current sampling circuit It is connected with the sampling control signal output end of core control panel, the output of analog-digital conversion circuit as described terminates the defeated of core control panel Enter end, the protection circuit sample circuit is used for electric current during sample power line short, measurement current sample electricity Road is used for electric current during sample power circuit normal work.
2. the mast switch controller current measurement circuit according to claim 1 for possessing sampling channel handoff functionality, its It is characterised by:The handover module includes the first electronic switch and the second electronic switch, first electronic switch and the second electricity The input of sub switch connects the Current Transformer Secondary side on power circuit, first electronic switch and the second electronic cutting respectively The output end of pass connects the input of protection circuit sample circuit and measurement current sampling circuit, first electronic cutting respectively Close the switch-over control signal output end for connecing core control panel respectively with the control terminal of the second electronic switch.
3. the mast switch controller current measurement circuit according to claim 2 for possessing sampling channel handoff functionality, its It is characterised by:First electronic switch and the second electronic switch are relay.
4. the mast switch controller current measurement circuit according to claim 2 for possessing sampling channel handoff functionality, its It is characterised by:First electronic switch and the second electronic switch are metal-oxide-semiconductor or triode.
5. the mast switch controller current measurement circuit according to claim 1 for possessing sampling channel handoff functionality, its It is characterised by:The core control panel is realized by single-chip microcomputer, MCU microprocessors or PLC.
6. the mast switch controller current measurement circuit according to claim 1 for possessing sampling channel handoff functionality, its It is characterised by:The protection includes current signal being transformed to voltage with circuit sample circuit and measurement with current sampling circuit The circuit of signal mode analog quantity and the circuit sampled in the presence of sampling control signal to voltage signal analog quantity.
7. the mast switch controller current measurement circuit according to claim 1 for possessing sampling channel handoff functionality, its It is characterised by:Analog-digital conversion circuit as described is realized by model ADC0809 chip.
CN201720672645.9U 2017-06-09 2017-06-09 Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality Active CN206832879U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720672645.9U CN206832879U (en) 2017-06-09 2017-06-09 Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720672645.9U CN206832879U (en) 2017-06-09 2017-06-09 Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality

Publications (1)

Publication Number Publication Date
CN206832879U true CN206832879U (en) 2018-01-02

Family

ID=60775277

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720672645.9U Active CN206832879U (en) 2017-06-09 2017-06-09 Possesses the mast switch controller current measurement circuit of sampling channel handoff functionality

Country Status (1)

Country Link
CN (1) CN206832879U (en)

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Date Code Title Description
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20210210

Address after: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District

Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.

Address before: 510000 No. 2 Tianhe Second Road, Tianhe District, Guangzhou City, Guangdong Province

Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd.

TR01 Transfer of patent right