CN106154015A - Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device - Google Patents
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device Download PDFInfo
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- CN106154015A CN106154015A CN201610647706.6A CN201610647706A CN106154015A CN 106154015 A CN106154015 A CN 106154015A CN 201610647706 A CN201610647706 A CN 201610647706A CN 106154015 A CN106154015 A CN 106154015A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The invention discloses a kind of distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device, including the support insulator sensor being connected with test line, support insulator sensor is connected with voltage collector；Described voltage collector includes the voltage signal input protection circuit being connected with support insulator sensor; voltage signal input protection circuit is connected with voltage collection circuit; voltage collection circuit is connected with microcontroller by AG translation circuit; microcontroller connects display circuit, inspection electricity output circuit, locking output circuit, separately has the self-checking circuit being connected with support insulator sensor.Present configuration is reasonable, favorable working performance.
Description
Technical field
The present invention relates to a kind of distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device.
Background technology
In order to reduce environmental pollution, it is ensured that the sustainable development of the energy, country makes a series of energy industry successively
Policy, ensures that renewable energy power generation is fully purchased, advances distribution type renewable energy fast-developing.Regenerative resource is main
Having solar energy, wind energy, tide energy etc., but these energy are because of affected by a natural, output voltage is unstable, entail dangers to electrical network
Reliable and safe operation.According to distributed power generation project access system technology requirement, and site (subscriber's drop switch) should have
Standby decompression tripping operation and inspection have ballast closing function, access point substation equipment should realize checkout voltage coincidence function.
The collection accessing line voltage distribution is typically install circuit buckling in access point access side at present be acquired, and mesh
Front transformer station 10kV middle-placed switch cabinet endogenous cause of ill space limits does not possesses the condition installing independent buckling additional, and circuit buckling is expensive.Existing
There is switch cubicle high voltage display device can detect a line voltage distribution, and show primary line according to the height of a line voltage distribution
Road is the most charged, and volume is little, and price is low.The voltage detector component of high voltage display device mainly has contactless (circuit)
Vicarious with directly contact (circuit) capacitance-voltage-distributing type (support insulator sensor), the induction medium of contactless vicarious
Including an air between circuit and sensing element, testing result can be with the change of air humidity and temperature, particularly humidity
And change, therefore should not use；And the sensing element of support insulator sensor is the high pressure little Rong being directly connected with circuit
Amount electric capacity, its good environmental adaptability, stable performance.But the variation in capacitance value of each support insulator sensor is relatively big, and output
It is nonlinear.Original switch cabinet electrified display system, function is simple, and it passes through capacitive partial pressure sampler to line voltage distribution
Sampling, its sampled result discreteness is big, it is impossible to meet relay protection system to stability, reliability requirement.In order to solve
These problems, it is possible to use following measures: A, adjustment unit is set in miniaturized circuitry voltage collecting device, once during test
Circuit applies rated voltage, then triggers adjustment unit and automatically calibrate.B, the support insulator of specific factory specific model is sensed
Device carries out parameter and picks up survey, and is worked out by characteristic curve in the firmware of miniaturized circuitry voltage collecting device, is adjusted.
Accordingly, it would be desirable to a kind of miniaturized circuitry voltage collecting device, gather voltage and definite value relatively after, protection dress is given in output
Put, thus realize tripping operation and the reclosing function of regulation.
Summary of the invention
It is an object of the invention to provide a kind of rational in infrastructure, the distributed power source circuit middle-placed switch cabinet of favorable working performance is small-sized
Line voltage distribution harvester.
The technical solution of the present invention is:
A kind of distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device, is characterized in that: include being connected with test line
Support insulator sensor, support insulator sensor is connected with voltage collector；Described voltage collector includes and pillar
The voltage signal input protection circuit that insulator sensor connects, voltage signal input protection circuit is with voltage collection circuit even
Connecing, voltage collection circuit is connected with microcontroller by AG translation circuit, microcontroller connect display circuit, examine electric output circuit,
Locking output circuit, separately has the self-checking circuit being connected with support insulator sensor；
Described display circuit be provided with three Digital sum pipes, three phase places instruction red light, one green unlock display lamp, one once
Line voltage distribution is under-voltage display lamp；Three Digital sum pipes are for line voltage distribution of display, and resolution is 0.1kV；
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device is provided with threshold values and adjusts function, can adjust triggering inspection
Circuit threshold voltage of electrical output signal switching；
Pressing white " self-inspection " button, no matter whether charged circuit of high pressure equipment is, three-phase charged instruction red light and charactron
The brightest, go out, so circulation 3 times, it is achieved self-checking function；Because the parameter of each support insulator sensor has deviation, in fortune
Need before row to calibrate, with correct measurement line voltage distribution；Apply to exchange 50Hz nominal voltage between pickup wire terminal and ground
5.77kV；Pressing " calibration " button not put, numeral method " SET " after 3 seconds, unclamp " calibration " button, display is carried out automatically
Nominal voltage is calibrated；After " SET " disappears, calibration terminates；After power down, calibration value still keeps；Trigger the switching of under-voltage output signal
A circuit threshold voltage can adjust threshold value setting, press " threshold values " button, numeral method preset threshold value, unclamp " valve
Value " button, press " increase " or " reduction " key in 3 seconds, often increased by a threshold values or reduced 0.1 kV, stopping key 3 seconds
Zhong Hou, it is to set threshold values that currently displaying threshold values is remembered by display automatically, and after power down, threshold values still keeps；During operation, charactron
Circulation display three-phase phase voltage, as long as certain phase voltage is put out more than 4 kV, corresponding charged instruction when red, the green display lamp that unlocks
Go out, live locking switch K5 and the junction closure of live locking switch K6, live locking switch K5's and live locking switch K4
Contact disconnects；When three-phase voltage is both less than 1.5kV, charged instruction red light is all off, and green unblock display lamp is bright, live locking
The contact of switch K5 and live locking switch K6 disconnects, live locking switch K5 and the junction closure of live locking switch K4；Only
Wanting certain phase voltage less than threshold voltage, under-voltage instruction when red, under-voltage output switch K2 closes with the contact of under-voltage output switch K3
Closing, the contact of under-voltage output switch K2 and under-voltage output switch K1 disconnects；When three-phase voltage is both greater than threshold voltage, under-voltage finger
Showing that red light extinguishes, the contact of under-voltage output switch K2 and under-voltage output switch K3 disconnects, under-voltage output switch K2 and under-voltage output
The junction closure of switch K1.
Described voltage signal input protection circuit forms: voltage signal input line is over the ground and+5V meets a 1N4007 respectively
Diode, it would be possible to input pulse signal pincers between ground level and power level, prevent pulse signal from damaging other electricity
Sub-element.
Described voltage collection circuit includes that sample circuit, sample circuit are connected with vibration, filter circuit, vibration, filtered electrical
Road is connected with operational amplifier.
Present invention have the advantages that, installing and using of distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device,
Compared with circuit buckling, volume is little, low cost, it is simple to is arranged in the 10kV middle-placed switch cabinet of regenerative resource plant-grid connection point, adopts
Collecting voltage and definite value relatively after, output to protection device, it is achieved the tripping operation of regulation and reclosing function.Easy for installation, distributed
Power circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device conveniently to be installed, it is possible to saves human and material resources, economical and practical, cost
Low, space is little, dependable performance, and device performance parameters is the most affected by environment.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is voltage signal input protection circuit schematic diagram.
Fig. 3 is voltage collector circuit diagram.
Fig. 4 is device field connection figure.
Fig. 5 is device rear connection figure.
Detailed description of the invention
A kind of distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device, including the pillar being connected with test line
Insulator sensor, support insulator sensor is connected with voltage collector；Described voltage collector includes and support insulator
The voltage signal input protection circuit that sensor connects, voltage signal input protection circuit is connected with voltage collection circuit, voltage
Acquisition Circuit is connected with microcontroller by AG translation circuit, and microcontroller connects display circuit, inspection electricity output circuit, locking output
Circuit, separately has the self-checking circuit being connected with support insulator sensor；
Described display circuit be provided with three Digital sum pipes, three phase places instruction red light, one green unlock display lamp, one once
Line voltage distribution is under-voltage display lamp；Three Digital sum pipes are for line voltage distribution of display, and resolution is 0.1kV；
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device is provided with threshold values and adjusts function, can adjust triggering inspection
Circuit threshold voltage of electrical output signal switching；
Pressing white " self-inspection " button, no matter whether charged circuit of high pressure equipment is, three-phase charged instruction red light and charactron
The brightest, go out, so circulation 3 times, it is achieved self-checking function；Because the parameter of each support insulator sensor has deviation, in fortune
Need before row to calibrate, with correct measurement line voltage distribution；Apply to exchange 50Hz nominal voltage between pickup wire terminal and ground
5.77kV；Pressing " calibration " button not put, numeral method " SET " after 3 seconds, unclamp " calibration " button, display is carried out automatically
Nominal voltage is calibrated；After " SET " disappears, calibration terminates；After power down, calibration value still keeps；Trigger the switching of under-voltage output signal
A circuit threshold voltage can adjust threshold value setting, press " threshold values " button, numeral method preset threshold value, unclamp " valve
Value " button, press " increase " or " reduction " key in 3 seconds, often increased by a threshold values or reduced 0.1 kV, stopping key 3 seconds
Zhong Hou, it is to set threshold values that currently displaying threshold values is remembered by display automatically, and after power down, threshold values still keeps；During operation, charactron
Circulation display three-phase phase voltage, as long as certain phase voltage is put out more than 4 kV, corresponding charged instruction when red, the green display lamp that unlocks
Go out, live locking switch K5 and the junction closure of live locking switch K6, live locking switch K5's and live locking switch K4
Contact disconnects；When three-phase voltage is both less than 1.5kV, charged instruction red light is all off, and green unblock display lamp is bright, live locking
The contact of switch K5 and live locking switch K6 disconnects, live locking switch K5 and the junction closure of live locking switch K4；Only
Wanting certain phase voltage less than threshold voltage, under-voltage instruction when red, under-voltage output switch K2 closes with the contact of under-voltage output switch K3
Closing, the contact of under-voltage output switch K2 and under-voltage output switch K1 disconnects；When three-phase voltage is both greater than threshold voltage, under-voltage finger
Showing that red light extinguishes, the contact of under-voltage output switch K2 and under-voltage output switch K3 disconnects, under-voltage output switch K2 and under-voltage output
The junction closure of switch K1.
Described voltage signal input protection circuit forms: voltage signal input line is over the ground and+5V meets a 1N4007 respectively
Diode, it would be possible to input pulse signal pincers between ground level and power level, prevent pulse signal from damaging other electricity
Sub-element.
Described voltage collection circuit includes that sample circuit, sample circuit are connected with vibration, filter circuit, vibration, filtered electrical
Road is connected with operational amplifier.
It is (normally opened and normally closed that distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device is provided with blocking output signal
Contact) and inspection electrical output signal (normally opened and normally closed contact).
When the virtual voltage of a line-to-ground at nominal voltage 40% to time between its rated voltage, lockout port is defeated
Go out block signal (normality contact)；When the virtual voltage of a line-to-ground is less than the 15% of nominal voltage, lockout port exports
Unlocking signal (dynamic contact).
When the virtual voltage of a circuit is less than the threshold voltage set, inspection electricity output port (often exports under-voltage signal
State contact)；When the virtual voltage of a circuit adds hysteresis higher than the threshold voltage set, inspection electricity output port output voltage
Normal signal (dynamic contact).
Microcontroller selects ATMEGA88PA, this MCU stable performance, and capacity of resisting disturbance is strong, the firmware program in MCU
Realizing the calibration of circuit rated voltage, the nonlinear operation of sampled voltage, line voltage distribution threshold values compares, and controls voltage detecting result defeated
Go out signal and the switching of locking output, control display etc..
Sample circuit is made up of sampling resistor R30 and RP1.The capacitance of different types of insulator sensor has difference,
Capacitance value range is from 30pF to 100pF, and being scaled impedance with formula 1/2 π fC (wherein f=50Hz) is 106M Ω to 31.8M Ω.
Be the voltage range 0～4V that voltage collector can bear by 0～5.77kV voltage transformation, sampling resistor is by following equation meter
Calculate:
Maximum sampling resistor=(4/ (5.77*1.414*103)) * 106*106=52*103 during 30pF
Maximum sampling resistor=(4/ (5.77*1.414*103)) * 31.8*106=15.6*103 during 100pF
Therefore R30 value 10k Ω, RP1 value 51k Ω, range of accommodation is 10k Ω to 61k Ω, covers required sampling resistor value.
Because needing to connect the wire of long 3 meters of 0.5mm2 between from insulator sensor to voltage collector, this wire
Inductance can produce vibration with the inductance capacitance in insulator sensor, is superimposed upon on collection signal, through measuring, and oscillator signal period
For 0.5ms～0.1ms.
Above-mentioned oscillator signal affects acquisition precision, therefore needs filter circuit to filter off oscillator signal.Filter off this oscillator signal, filter
Wave circuit RC time constant should be greater than 1.6 times of full swing signal periods (remaining oscillator signal being equivalent on filter capacitor C31
Only 1/10).In order to main signal not caused excessive impact, require that again filter circuit RC time constant should be less than 1/1.6 main letter
Number cycle, therefore filter circuit RC time constant should be between 0.8ms and 12.5ms.
Filter circuit is made up of R31, R1, R2, R7, the C31 in Fig. 3, and R31, R1, R2, R7 parallel value is 1.16M Ω, C31
For 1nF.
RC time constant=1.16M Ω * 1nF=1.16ms,
Between 0.8ms and 12.5ms.
Operational amplifier MCP6002 is mainly used in waveform shaping and voltage values, makes sampled voltage stable.
Microcontroller selects ATMEGA88PA, this MCU stable performance, and capacity of resisting disturbance is strong, has been internally integrated 8 bits
AD changer, stride is 1/28=1/256, and corresponding 5.77kV voltage has the resolution of 22.54V.
Firmware program in MCU realizes the calibration of circuit rated voltage, the nonlinear operation of sampled voltage, line voltage distribution threshold values
Relatively, control voltage detecting result output signal and the switching of locking output, control display etc..
Because the relation between sensing output and a line voltage distribution of support insulator sensor is nonlinear, but specific
The sensor characteristics of type is close, and that need to actual measure between a line voltage distribution and the sensing output valve of sensor during design is right
Should be related to, draw characteristic curve, and this characteristic curve is enrolled the firmware program in MCU.During actual measurement, by sensing output valve
Search corresponding characteristic curve formula, then calculate an actual line voltage distribution.
Furthermore, because the variation in capacitance value of each support insulator sensor same type of is relatively big, need before operation into
Row is adjusted, and method is: applying rated voltage at a circuit, then trigger calibration button, the firmware program in MCU calculates actual adopting
Collecting voltage and the ratio of preset value, and remember, adjust with this ratio during operation and gather voltage, can correct measurement actual track electricity
Pressure.
Claims (6)
1. a distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device, is characterized in that: include with test line even
The support insulator sensor connect, support insulator sensor is connected with voltage collector；Described voltage collector includes and props up
The voltage signal input protection circuit that post insulator sensor connects, voltage signal input protection circuit is with voltage collection circuit even
Connecing, voltage collection circuit is connected with microcontroller by AG translation circuit, microcontroller connect display circuit, examine electric output circuit,
Locking output circuit, separately has the self-checking circuit being connected with support insulator sensor；
Described display circuit be provided with three Digital sum pipes, three phase places instruction red light, one green unlock display lamp, one once
Line voltage distribution is under-voltage display lamp；Three Digital sum pipes are for line voltage distribution of display, and resolution is 0.1kV；
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device is provided with threshold values and adjusts function, can adjust triggering inspection
Circuit threshold voltage of electrical output signal switching；
Pressing white " self-inspection " button, no matter whether charged circuit of high pressure equipment is, three-phase charged instruction red light and charactron
The brightest, go out, so circulation 3 times, it is achieved self-checking function；Because the parameter of each support insulator sensor has deviation, in fortune
Need before row to calibrate, with correct measurement line voltage distribution；Apply to exchange 50Hz nominal voltage between pickup wire terminal and ground
5.77kV；Pressing " calibration " button not put, numeral method " SET " after 3 seconds, unclamp " calibration " button, display is carried out automatically
Nominal voltage is calibrated；After " SET " disappears, calibration terminates；After power down, calibration value still keeps；Trigger the switching of under-voltage output signal
A circuit threshold voltage can adjust threshold value setting, press " threshold values " button, numeral method preset threshold value, unclamp " valve
Value " button, press " increase " or " reduction " key in 3 seconds, often increased by a threshold values or reduced 0.1 kV, stopping key 3 seconds
Zhong Hou, it is to set threshold values that currently displaying threshold values is remembered by display automatically, and after power down, threshold values still keeps；During operation, charactron
Circulation display three-phase phase voltage, as long as certain phase voltage is put out more than 4 kV, corresponding charged instruction when red, the green display lamp that unlocks
Go out, live locking switch K5 and the junction closure of live locking switch K6, live locking switch K5's and live locking switch K4
Contact disconnects；When three-phase voltage is both less than 1.5kV, charged instruction red light is all off, and green unblock display lamp is bright, live locking
The contact of switch K5 and live locking switch K6 disconnects, live locking switch K5 and the junction closure of live locking switch K4；Only
Wanting certain phase voltage less than threshold voltage, under-voltage instruction when red, under-voltage output switch K2 closes with the contact of under-voltage output switch K3
Closing, the contact of under-voltage output switch K2 and under-voltage output switch K1 disconnects；When three-phase voltage is both greater than threshold voltage, under-voltage finger
Showing that red light extinguishes, the contact of under-voltage output switch K2 and under-voltage output switch K3 disconnects, under-voltage output switch K2 and under-voltage output
The junction closure of switch K1.
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device the most according to claim 1, is characterized in that: institute
State voltage signal input protection circuit composition: voltage signal input line is over the ground and+5V connects a 1N4007 diode respectively, can
The input pulse signal pincers of energy, between ground level and power level, prevent pulse signal from damaging other electron component.
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device the most according to claim 1, is characterized in that: institute
Stating voltage collection circuit and include that sample circuit, sample circuit are connected with vibration, filter circuit, vibration, filter circuit are put with computing
Big device connects.
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device the most according to claim 1, is characterized in that: adopt
Sample circuit is made up of sampling resistor R30 and RP1.
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device the most according to claim 1, is characterized in that: no
Having difference with the capacitance of the insulator sensor of type, capacitance value range is from 30pF to 100pF, with formula 1/2 π fC, wherein f
=50Hz, being scaled impedance is 106M Ω to 31.8M Ω.
Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device the most according to claim 5, is characterized in that: will
0～5.77kV voltage transformation is the voltage range 0～4V that voltage collector can bear, and sampling resistor is calculated by following equation:
Maximum sampling resistor=(4/ (5.77*1.414*103)) * 106*106=52*103 during 30pF；
Maximum sampling resistor=(4/ (5.77*1.414*103)) * 31.8*106=15.6*103 during 100pF；
Therefore R30 value 10k Ω, RP1 value 51k Ω, range of accommodation is 10k Ω to 61k Ω, covers required sampling resistor value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647706.6A CN106154015A (en) | 2016-08-10 | 2016-08-10 | Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device |
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| CN201610647706.6A CN106154015A (en) | 2016-08-10 | 2016-08-10 | Distributed power source circuit middle-placed switch cabinet miniaturized circuitry voltage collecting device |
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| CN108732412A (en) * | 2018-04-17 | 2018-11-02 | 广东电网有限责任公司 | A kind of potential indicator |
| US20210281292A1 (en) * | 2020-03-06 | 2021-09-09 | Avid Identification Systems, Inc. | Variable-q antenna coil circuit for rfid applications |
| CN117233455A (en) * | 2023-11-13 | 2023-12-15 | 湖南北顺源智能科技有限公司 | Modular high-voltage converter distributed sampling circuit system |
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| US20210281292A1 (en) * | 2020-03-06 | 2021-09-09 | Avid Identification Systems, Inc. | Variable-q antenna coil circuit for rfid applications |
| US11728847B2 (en) * | 2020-03-06 | 2023-08-15 | Avid Identification Systems, Inc. | Variable-Q antenna coil circuit for RFID applications |
| CN117233455A (en) * | 2023-11-13 | 2023-12-15 | 湖南北顺源智能科技有限公司 | Modular high-voltage converter distributed sampling circuit system |
| CN117233455B (en) * | 2023-11-13 | 2024-02-06 | 湖南北顺源智能科技有限公司 | Modular high-voltage converter distributed sampling circuit system |
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Application publication date: 20161123 |