CN105954675B - The outdoor type high-voltage intelligent circuit breaker and its control method precisely judged based on ground connection - Google Patents
The outdoor type high-voltage intelligent circuit breaker and its control method precisely judged based on ground connection Download PDFInfo
- Publication number
- CN105954675B CN105954675B CN201610557760.1A CN201610557760A CN105954675B CN 105954675 B CN105954675 B CN 105954675B CN 201610557760 A CN201610557760 A CN 201610557760A CN 105954675 B CN105954675 B CN 105954675B
- Authority
- CN
- China
- Prior art keywords
- phase
- resistance
- sampling
- connect
- transformer
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of outdoor type high-voltage intelligent circuit breakers and its control method precisely judged based on ground connection, including breaker body component S, intelligent controller, circuit-breaker switching on-off drives and transmission parts, working power and line voltage sampling transformer L1, A phase voltage sample resistances R1A, A phase sampling transformers L2A, B phase voltage sample resistances R1B, B phase sampling transformers L2B, C phase voltage sample resistances R1C, C phase sampling transformers L2C, A phase current sampling mutual inductors L3A, A phase sampling transformers L4A, B phase current sampling mutual inductors L3B, B phase sampling transformers L4B, C phase current sampling mutual inductors L3C, C phase sampling transformers L4C.The present invention, which can be grounded power grid, precisely to be judged, so as to correct starting protection or alarm.
Description
Technical field
The present invention relates to a kind of intelligent breaker and its control method, especially a kind of open air precisely judged based on ground connection
Formula high-voltage intelligent circuit breaker and its control method.
Background technology
Outdoor type high-voltage circuitbreaker is used widely in for electricity consumption power grid, the important base as high voltage power distribution and electricity consumption
Plinth equipment ensures the safety and economic operation of power grid.In recent years, outdoor type high-voltage circuitbreaker develops to intelligent direction, once
Switch, current transformer, voltage transformer etc. are combined with secondary automation equipment, become outdoor type high-voltage intelligent circuit breaker,
With comprehensive automations such as measurement, control, protection, signal, movement, self diagnosis(Or it is intelligent)Function, as with electricity consumption power grid
Automatic circuit, boundary device in automated system etc..
Existing outdoor type high-voltage intelligent circuit breaker have electric current speed cut, overcurrent, overload, overvoltage, it is under-voltage, ground connection etc. compare
Complete defencive function, to ensure power grid security, economical operation.Its major defect be according to ground connection judge and implement protection,
Alarm is not accurate enough, namely practical ground connection does not monitor and reality is judged as being grounded without ground connection, as a result compromises power grid
Safety, economical operation, and then influence the normal production of vast electricity consumer, live.
Lack a kind of can be grounded power grid currently on the market precisely judge, so as to correct starting protection or alarm
And outdoor type high-voltage intelligent circuit breaker simple for structure, reliable for operation, easy to maintain.
Invention content
Technical problem to be solved by the invention is to provide a kind of outdoor type high-voltage intelligent precisely judged based on ground connection is disconnected
Road device and its control method, it, which can be grounded power grid, precisely judges, so as to correct starting protection or alarm.
In order to solve the above technical problems, the technical solution adopted in the present invention is:
A kind of outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection, it is characterised in that:Including breaker body
Component S, intelligent controller, circuit-breaker switching on-off driving and transmission parts, working power, line voltage sampling transformer L1, A phase electricity
Pressure sample resistance R1A, A phase sampling transformer L2A, B phase voltage sample resistance R1B, B phase sampling transformer L2B, C phase voltage takes
Sample resistance R1C, C phase sampling transformer L2C, A phase current sampling mutual inductor L3A, A phase sampling transformer L4A, B phase current samples
Mutual inductor L3B, B phase sampling transformer L4B, C phase current sampling mutual inductor L3C, C phase sampling transformer L4C, breaker body portion
Part is connected on three-phase alternating-current supply UA, UB, UC, the primary coil both ends of line voltage sampling transformer L1 respectively with three-phase alternating current
Power supply UA, UC connection, secondary coil one end of line voltage sampling transformer L1 are connect with working power and the one end resistance R2, resistance
The R2 other ends are connect with transformer L5 primary coils one end, the secondary coil other end and transformer of line voltage sampling transformer L1
The L5 primary coil other ends are connected with working power, and working power exports DC power supply VCC and VDD, A phase voltages sampling electricity respectively
Resistance one end R1A is connect with three phase mains UA, the primary line of the A phase voltages sample resistance R1A other ends and A phase sampling transformers L2A
Enclose one end connection, the primary coil other end ground connection of A phase sampling transformers L2A, B phase voltages one end sample resistance R1B and three-phase
Power supply UB connections, the B phase voltages sample resistance R1B other ends are connect with primary coil one end of B phase sampling transformers L2B, and B phases take
The primary coil other end of sample transformer L2B is grounded, and C phase voltages one end sample resistance R1C is connect with three phase mains UC, C phase electricity
The pressure sample resistance R1C other ends are connect with primary coil one end of C phase sampling transformers L2C, and C phase sampling transformers L2C's is first
Grade coil other end ground connection, A phase current sampling mutual inductors L3A are arranged on three phase mains UA, A phase current sampling mutual inductors L3A
Both ends connect with the both ends A phase sampling transformer L4A and A phase current sampling mutual inductor L3A and A phase sampling transformers L4A one
End ground connection, B phase current sampling mutual inductors L3B are arranged on three phase mains UB, and the B phase currents both ends sampling mutual inductor L3B take with B phases
The both ends sample transformer L4B connect and one end of B phase current sampling mutual inductor L3B and B phase sampling transformers L4B ground connection, C phase electricity
It flows sampling mutual inductor L3C to be arranged on three phase mains UC, the C phase currents both ends sampling mutual inductor L3C and C phase sampling transformers L4C
Both ends connect and one end of C phase current sampling mutual inductor L3C and C phase sampling transformers L4B ground connection, transformer L5, A phase sample
Transformer L2A, B phase sampling transformer L2B, C phase sampling transformer L2C, A phase sampling transformer L4A, B phase sampling transformer
The secondary coil of L4B, C phase sampling transformer L4C are protected with corresponding sampling protection amplitude rectification phase-correcting circuit connection, sampling
The output of shield amplitude rectification phase-correcting circuit is connect with intelligent controller, A phase sampling transformer L2A, B phase sampling transformers
The corresponding sampling protection amplitude rectification phase-correcting circuits of L2B, C phase sampling transformer L2C and residual voltage sampling and amplitude school
Positive circuit connects, and width is protected in the corresponding samplings of A phase sampling transformer L4A, B phase sampling transformer L4B, C phase sampling transformers L4C
Value phase calibration correcting circuit is sampled with zero-sequence current and is connect with amplitude rectification circuit, residual voltage sampling and amplitude rectification circuit
It samples with zero-sequence current and is connect with intelligent controller with the output of amplitude rectification circuit, circuit-breaker switching on-off driving and transmission parts
It is connect respectively with breaker body component S and intelligent controller and breaker body component S break-makes is controlled by intelligent controller.
Further, also comprising GPRS communication components, GPRS communication components are connect with intelligent controller.
Further, the sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device D1 anodes, resistance R3
The place of working connection of one end, the one end correction base value resistance R4, amplitude rectification one end resistance R5 and working power, protects pressure-sensitive device
D1 cathode are connect with the resistance R3 other ends, the one end correction base value resistance R6, the one end phasing capacitor C1, correct base value resistance
The R6 other ends are connect with the correction base value resistance R4 other ends, the one end adjustable resistance R7, the adjustable resistance R7 other ends and resistance R8 mono-
End connection, the resistance R8 other ends are connect with the phasing capacitor C1 other ends, operational amplifier T1 anodes, amplitude rectification resistance
The R5 other ends are connect with operational amplifier T1 cathode, the one end amplitude rectification resistance R9, the amplitude rectification resistance R9 other ends with it is adjustable
The one end resistance R10 connects, and the adjustable resistance R10 other ends are connect with operational amplifier T1 output ends, operational amplifier T1 work electricity
Pressure both ends are connect with DC power supply VCC and VDD respectively.
Further, the residual voltage, which is sampled with amplitude rectification circuit, is:Residual voltage combined resistance R11, R12, R13
In parallel and residual voltage combined resistance R11, R12, R13 one end and operational amplifier T2 cathode, residual voltage amplitude rectification
The one end resistance R14 connects, and the residual voltage amplitude rectification resistance R14 other ends are connect with the one end adjustable resistance R15, adjustable resistance
The R15 other ends are connect with operational amplifier T2 output ends and intelligent controller, and operational amplifier T2 anodes connect place of working, and operation is put
Big device T2 operating voltages both ends are connect with DC power supply VCC and VDD respectively.
Further, the zero-sequence current, which is sampled with amplitude rectification circuit, is:Zero-sequence current combined resistance R16, R17, R18
In parallel and zero-sequence current combined resistance R16, R17, R18 one end and operational amplifier T3 cathode, zero-sequence current amplitude rectification
The one end resistance R19 connects, and the zero-sequence current amplitude rectification resistance R19 other ends are connect with the one end adjustable resistance R20, adjustable resistance
The R20 other ends are connect with operational amplifier T3 output ends and intelligent controller, and operational amplifier T3 anodes connect place of working, and operation is put
Big device T3 operating currents both ends are connect with DC power supply VCC and VDD respectively.
A kind of control method of the outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection, it is characterised in that:
Line voltage precisely samples:A, C phases line voltages warp voltage sampling transformer L1 is once depressured again through resistance R2, transformation
Bis- decompressions of device L5, in the secondary output of transformer L5, after protecting pressure-sensitive device D1, the limitation protection of resistance R3 overvoltage,
Correction base value resistance R6 determines the base value of accuracy correction with the resistance value ratio for correcting base value resistance R4, amplitude rectification resistance R9 with can
Resistance R10 and amplitude rectification resistance R5, operational amplifier T1 is adjusted to form a ratio circuit, by adjusting the schools adjustable resistance R10
The amplitude error that main track voltage sampling generates, phasing capacitor C1, adjustable resistance R7, resistance R8 and operational amplifier T1 groups
At a differential circuit, the phase error generated by adjusting adjustable resistance R7 compensation line voltage samplings, sampling line voltage is through school
Intelligent controller 1 is connected to by operational amplifier T1 outputs after just;
A phase voltages precisely sample:A phase voltages UA is through A phase voltage sample resistances R1A decompressions and A phase sampling transformers L2A electricity
Air bound is from rear, after protecting pressure-sensitive device D1B, the limitation protection of resistance R3B overvoltage, correction base value resistance R6B and correction base
The resistance value ratio of value resistance R4B determines the base value of accuracy correction, amplitude rectification resistance R9B and adjustable resistance R10B and amplitude rectification
Resistance R5B, operational amplifier T1B form a ratio circuit, and phase voltage sampling generation is corrected by adjusting adjustable resistance R10B
Amplitude error, phasing capacitor C1B, adjustable resistance R7B, resistance R8B and operational amplifier T1B form a differential electricity
Road corrects the phase error that phase voltage sampling generates, by operation after A phase sampling voltages are calibrated by adjusting adjustable resistance R7B
Amplifier T1B outputs are connected to intelligent controller 1 and residual voltage combined resistance R11;
The accurate sampling of B phase voltages and the accurate sampling of C phase voltages precisely sample identical with A phase voltages;
A phase currents precisely sample:A phase currents are after stream and electrical isolation once drop in A phase current sampling mutual inductors L3A through A
After bis- drop streams of phase sampling transformer L4A and electrical isolation, through protecting pressure-sensitive device D1E, resistance R3E overvoltage to limit protection
Afterwards, correction base value resistance R6E determines the base value of accuracy correction, amplitude rectification resistance with the resistance value ratio for correcting base value resistance R4E
R9E and adjustable resistance R10E and amplitude rectification resistance R5E, operational amplifier T1E form a ratio circuit, adjustable by adjusting
The amplitude error that resistance R10E correction phase current sampling generates, phasing capacitor C1E, adjustable resistance R7E, resistance R8E with
Operational amplifier T1E forms a differential circuit, and the phase that phase current sampling generation is corrected by adjusting adjustable resistance R7E is missed
Difference is connected to intelligent controller 1 and zero-sequence current combined resistance after A phase sampling currents are calibrated by operational amplifier T1E outputs
R16;
The accurate sampling of B phase currents and the accurate sampling of C phase currents precisely sample identical with A phase currents;
Residual voltage precisely samples:A, B, C three-phase voltage are respectively through residual voltage combined resistance R11, R12, R13 in operation
The cathode of amplifier T2, which is added, generates residual voltage, through residual voltage amplitude rectification resistance R14, adjustable resistance R15, operation amplifier
Intelligent controller 1 is connected to by the output of operational amplifier T2 after the amplitude rectification of device T2 compositions, adjustable resistance R15 is adjusted and changes
Output amplitude;
Zero-sequence current precisely samples:A, B, C three-phase current are respectively through zero-sequence current combined resistance R16, R17, R18 in operation
The cathode of amplifier T3, which is added, generates zero-sequence current, through zero-sequence current amplitude rectification resistance R19, adjustable resistance R20, operation amplifier
Intelligent controller 1 is connected to by the output of operational amplifier T3 after the amplitude rectification of device T3 compositions, adjustable resistance R20 is adjusted and changes
Output amplitude;
Ground connection precisely judges:The line voltage analog quantity that intelligent controller 1 exports operational amplifier T1A, operational amplifier
The voltage analog of T1B, T1C, T1D output, the phase current analog quantity of operational amplifier T1E, T1F, T1G output, operation amplifier
The amplitude and phase of the residual voltage analog quantity of device T2 output and the zero-sequence current analog quantity of operational amplifier T3 outputs are into line number
Wordization processing, on the basis of relevant parameter accurately measures, to precisely judge the state of high-tension line according to dependency rule, connect
Separate, ground connection the position on ground, property, the situation of ground connection of ground connection.
Further, intelligent process, intelligent controller 1 pass through GPRS communication units on the basis of ground connection precisely judges
Part 4 sends out ground state signal, and is driven with transmission parts 2 to breaker body by circuit-breaker switching on-off according to ground state
Component S carries out separating brake, is grounded protection.
Compared with prior art, the present invention haing the following advantages and effect:It is simple for structure, reliable for operation, easy to maintain, energy
Enough be grounded to power grid precisely judges, so as to correct starting protection or alarm.
Description of the drawings
Fig. 1 is the schematic diagram for the outdoor type high-voltage intelligent circuit breaker of the present invention precisely judged based on ground connection.
Fig. 2 is that amplitude rectification is protected in the sampling for the outdoor type high-voltage intelligent circuit breaker of the present invention precisely judged based on ground connection
The circuit diagram of phase-correcting circuit.
Fig. 3 is residual voltage sampling and the width for the outdoor type high-voltage intelligent circuit breaker of the present invention precisely judged based on ground connection
It is worth the circuit diagram of correcting circuit.
Fig. 4 is zero-sequence current sampling and the width for the outdoor type high-voltage intelligent circuit breaker of the present invention precisely judged based on ground connection
It is worth the circuit diagram of correcting circuit.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited in following embodiments.
As shown, a kind of outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection of the present invention, including open circuit
Device body part S, intelligent controller 1, circuit-breaker switching on-off driving and transmission parts 2, working power 3, line voltage sample transformation
Device L1, A phase voltage sample resistance R1A, A phase sampling transformer L2A, B phase voltage sample resistance R1B, B phase sampling transformer L2B,
C phase voltage sample resistance R1C, C phase sampling transformer L2C, A phase current sampling mutual inductor L3A, A phase sampling transformer L4A, B phases
Current sampling mutual inductor L3B, B phase sampling transformer L4B, C phase current sampling mutual inductor L3C, C phase sampling transformer L4C.
Breaker body component S is connected on three-phase alternating-current supply UA, UB, UC, the primary of line voltage sampling transformer L1
Coil both ends are connect with three-phase alternating-current supply UA, UC respectively, secondary coil one end and the work electricity of line voltage sampling transformer L1
Source 3 is connected with the one end resistance R2, and the resistance R2 other ends are connect with transformer L5 primary coils one end, line voltage sampling transformer L1
The secondary coil other end connect with the transformer L5 primary coils other end and working power 3, working power 3 exports direct current respectively
Power supply VCC and VDD.
A phase voltages one end sample resistance R1A is connect with three phase mains UA, the A phase voltages sample resistance R1A other ends and A phases
Primary coil one end of sampling transformer L2A connects, the primary coil other end ground connection of A phase sampling transformers L2A;B phase voltages
The one end sample resistance R1B is connect with three phase mains UB, and the B phase voltages sample resistance R1B other ends are with B phase sampling transformers L2B's
Primary coil one end connects, the primary coil other end ground connection of B phase sampling transformers L2B;The one end C phase voltage sample resistance R1C
It is connect with three phase mains UC, the C phase voltages sample resistance R1C other ends and primary coil one end of C phase sampling transformers L2C connect
It connects, the primary coil other end ground connection of C phase sampling transformers L2C,.
A phase current sampling mutual inductors L3A is arranged on three phase mains UA, the A phase currents both ends sampling mutual inductor L3A and A phases
The both ends sampling transformer L4A connect and one end of A phase current sampling mutual inductor L3A and A phase sampling transformers L4A ground connection;B phases
Current sampling mutual inductor L3B is arranged on three phase mains UB, the B phase currents both ends sampling mutual inductor L3B and B phase sampling transformers
The both ends L4B connect and one end of B phase current sampling mutual inductor L3B and B phase sampling transformers L4B ground connection;The sampling of C phase currents is mutual
Sensor L3C is arranged on three phase mains UC, and the C phase currents both ends sampling mutual inductor L3C are connect with the both ends C phase sampling transformer L4C
And one end of C phase current sampling mutual inductor L3C and C phase sampling transformers L4B is grounded.
Transformer L5, A phase sampling transformer L2A, B phase sampling transformer L2B, C phase sampling transformer L2C, A phase samples change
The secondary coil of depressor L4A, B phase sampling transformer L4B, C phase sampling transformer L4C protects amplitude rectification phase with corresponding sampling
Bit correction circuit connects, and the output of sampling protection amplitude rectification phase-correcting circuit is connect with intelligent controller, and A phases sample transformation
Amplitude rectification phase-correcting circuit and zero is protected in the corresponding samplings of device L2A, B phase sampling transformer L2B, C phase sampling transformer L2C
Sequence voltage sampling is connect with amplitude rectification circuit, A phase sampling transformer L4A, B phase sampling transformer L4B, C phase sampling transformers
The corresponding sampling protection amplitude rectification phase-correcting circuits of L4C are sampled with zero-sequence current to be connect with amplitude rectification circuit, zero sequence electricity
Pressure sampling is connect with amplitude rectification circuit and zero-sequence current sampling is connect with the output of amplitude rectification circuit with intelligent controller, is broken
Road device divide-shut brake driving and transmission parts connect with breaker body component S and intelligent controller controlled by intelligent controller respectively
Breaker body component S break-makes.
The outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection also includes GPRS communication components, GPRS communication components
It is connect with intelligent controller.
Sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device D1 anodes, the one end resistance R3, correction base value
The place of working of the one end resistance R4, amplitude rectification one end resistance R5 and working power connects, and protects pressure-sensitive device D1 cathode and resistance
The R3 other ends, the one end correction base value resistance R6, the connection of the one end phasing capacitor C1, correct the base value resistance R6 other ends and school
The positive base value resistance R4 other ends, the connection of the one end adjustable resistance R7, the adjustable resistance R7 other ends are connect with the one end resistance R8, resistance R8
The other end is connect with the phasing capacitor C1 other ends, operational amplifier T1 anodes, the amplitude rectification resistance R5 other ends and fortune
Amplifier T1 cathode, the connection of the one end amplitude rectification resistance R9 are calculated, the amplitude rectification resistance R9 other ends connect with the one end adjustable resistance R10
Connect, the adjustable resistance R10 other ends are connect with operational amplifier T1 output ends, operational amplifier T1 operating voltages both ends respectively with directly
Galvanic electricity source VCC is connected with VDD.
Residual voltage is sampled with amplitude rectification circuit:Residual voltage combined resistance R11, R12, R13 parallel connection and zero sequence
One end of voltage combined resistance R11, R12, R13 and operational amplifier T2 cathode, the one end residual voltage amplitude rectification resistance R14 connect
It connects, the residual voltage amplitude rectification resistance R14 other ends are connect with the one end adjustable resistance R15, the adjustable resistance R15 other ends and operation
Amplifier T2 output ends are connected with intelligent controller, and operational amplifier T2 anodes connect place of working, operational amplifier T2 operating voltages
Both ends are connect with DC power supply VCC and VDD respectively.
Zero-sequence current is sampled with amplitude rectification circuit:Zero-sequence current combined resistance R16, R17, R18 parallel connection and zero sequence
One end of electric current combined resistance R16, R17, R18 and operational amplifier T3 cathode, the one end zero-sequence current amplitude rectification resistance R19 connect
It connects, the zero-sequence current amplitude rectification resistance R19 other ends are connect with the one end adjustable resistance R20, the adjustable resistance R20 other ends and operation
Amplifier T3 output ends are connected with intelligent controller, and operational amplifier T3 anodes connect place of working, operational amplifier T3 operating currents
Both ends are connect with DC power supply VCC and VDD respectively.
In particular:
Corresponding with transformer L5 sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device D1A anodes, electricity
The place of working for hindering the one end R3A, the one end correction base value resistance R4A, amplitude rectification one end resistance R5A and working power connects, protection
Pressure-sensitive device D1A cathode are connect with the resistance R3A other ends, the one end correction base value resistance R6A, the one end phasing capacitor C1A,
The correction base value resistance R6A other ends are connect with the correction base value resistance R4A other ends, the one end adjustable resistance R7A, adjustable resistance R7A
The other end is connect with the one end resistance R8A, the resistance R8A other ends and the phasing capacitor C1A other ends, operational amplifier T1A
Anode connection, the amplitude rectification resistance R5A other ends are connect with operational amplifier T1A cathode, the one end amplitude rectification resistance R9A, width
The value correction resistance R9A other ends are connect with the one end adjustable resistance R10A, and the adjustable resistance R10A other ends and operational amplifier T1A are defeated
Outlet connects, and operational amplifier T1A operating voltages both ends are connect with DC power supply VCC and VDD respectively.The secondary wire of transformer L5
Circle is connect with the positive and negative anodes of protection pressure-sensitive device D1A respectively.The output end of the adjustable resistance R10A other ends and operational amplifier T1A
It is connect with intelligent controller 1.
Corresponding with A phase sampling transformer L2A sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device
D1B anodes, the one end resistance R3B, the place of working for correcting the one end base value resistance R4B, the amplitude rectification one end resistance R5B and working power
Connection, protection pressure-sensitive device D1B cathode and the resistance R3B other ends, the one end correction base value resistance R6B, phasing capacitor C1B
One end connects, and the correction base value resistance R6B other ends are connect with the correction base value resistance R4B other ends, the one end adjustable resistance R7B, can
The resistance R7B other ends are adjusted to be connect with the one end resistance R8B, the resistance R8B other ends and the phasing capacitor C1B other ends, operation
Amplifier T1B anodes connect, the amplitude rectification resistance R5B other ends and operational amplifier T1B cathode, amplitude rectification resistance R9B mono-
End connection, the amplitude rectification resistance R9B other ends are connect with the one end adjustable resistance R10B, and the adjustable resistance R10B other ends are put with operation
Big device T1B output ends connection, operational amplifier T1B operating voltages both ends are connect with DC power supply VCC and VDD respectively.A phases sample
The secondary coil both ends of transformer L2A are connect with the positive and negative anodes of protection pressure-sensitive device D1B respectively.The adjustable resistance R10B other ends and
The output end of operational amplifier T1B is connect with the other end of intelligent controller 1 and residual voltage combined resistance R11.
Corresponding with B phase sampling transformer L2B sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device
D1C anodes, the one end resistance R3C, the place of working for correcting the one end base value resistance R4C, the amplitude rectification one end resistance R5C and working power
Connection, protection pressure-sensitive device D1C cathode and the resistance R3C other ends, the one end correction base value resistance R6C, phasing capacitor C1C
One end connects, and the correction base value resistance R6C other ends are connect with the correction base value resistance R4C other ends, the one end adjustable resistance R7C, can
The resistance R7C other ends are adjusted to be connect with the one end resistance R8C, the resistance R8C other ends and the phasing capacitor C1C other ends, operation
Amplifier T1C anodes connect, the amplitude rectification resistance R5C other ends and operational amplifier T1C cathode, amplitude rectification resistance R9C mono-
End connection, the amplitude rectification resistance R9C other ends are connect with the one end adjustable resistance R10C, and the adjustable resistance R10C other ends are put with operation
Big device T1C output ends connection, operational amplifier T1C operating voltages both ends are connect with DC power supply VCC and VDD respectively.B phases sample
The secondary coil both ends of transformer L2B are connect with the positive and negative anodes of protection pressure-sensitive device D1C respectively.The adjustable resistance R10C other ends and
The output end of operational amplifier T1C is connect with the other end of intelligent controller 1 and residual voltage combined resistance R12.
Corresponding with C phase sampling transformer L2C sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device
D1D anodes, the one end resistance R3D, the place of working for correcting the one end base value resistance R4D, the amplitude rectification one end resistance R5D and working power
Connection, protection pressure-sensitive device D1D cathode and the resistance R3D other ends, the one end correction base value resistance R6D, phasing capacitor C1D
One end connects, and the correction base value resistance R6D other ends are connect with the correction base value resistance R4D other ends, the one end adjustable resistance R7D, can
The resistance R7D other ends are adjusted to be connect with the one end resistance R8D, the resistance R8D other ends and the phasing capacitor C1D other ends, operation
Amplifier T1D anodes connect, the amplitude rectification resistance R5D other ends and operational amplifier T1D cathode, amplitude rectification resistance R9D mono-
End connection, the amplitude rectification resistance R9D other ends are connect with the one end adjustable resistance R10D, and the adjustable resistance R10D other ends are put with operation
Big device T1D output ends connection, operational amplifier T1D operating voltages both ends are connect with DC power supply VCC and VDD respectively.C phases sample
The secondary coil both ends of transformer L2C are connect with the positive and negative anodes of protection pressure-sensitive device D1D respectively.The adjustable resistance R10D other ends and
The output end of operational amplifier T1D is connect with the other end of intelligent controller 1 and residual voltage combined resistance R13.
Corresponding with A phase sampling transformer L4A sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device
D1E anodes, the one end resistance R3E, the place of working for correcting the one end base value resistance R4E, the amplitude rectification one end resistance R5E and working power
Connection, protection pressure-sensitive device D1E cathode and the resistance R3E other ends, the one end correction base value resistance R6E, phasing capacitor C1E
One end connects, and the correction base value resistance R6E other ends are connect with the correction base value resistance R4E other ends, the one end adjustable resistance R7E, can
The resistance R7E other ends are adjusted to be connect with the one end resistance R8E, the resistance R8E other ends and the phasing capacitor C1E other ends, operation
Amplifier T1E anodes connect, the amplitude rectification resistance R5E other ends and operational amplifier T1E cathode, amplitude rectification resistance R9E mono-
End connection, the amplitude rectification resistance R9E other ends are connect with the one end adjustable resistance R10E, and the adjustable resistance R10E other ends are put with operation
Big device T1E output ends connection, operational amplifier T1E operating voltages both ends are connect with DC power supply VCC and VDD respectively.A phases sample
The secondary coil both ends of transformer L4A are connect with the positive and negative anodes of protection pressure-sensitive device D1E respectively.The adjustable resistance R10E other ends and
The output end of operational amplifier T1E is connect with the other end of intelligent controller 1 and residual voltage combined resistance R16.
Corresponding with B phase sampling transformer L4B sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device
D1F anodes, the one end resistance R3F, the place of working for correcting the one end base value resistance R4F, the amplitude rectification one end resistance R5F and working power
Connection, protection pressure-sensitive device D1F cathode and the resistance R3F other ends, the one end correction base value resistance R6F, phasing capacitor C1F
One end connects, and the correction base value resistance R6F other ends are connect with the correction base value resistance R4F other ends, the one end adjustable resistance R7F, can
The resistance R7F other ends are adjusted to be connect with the one end resistance R8F, the resistance R8F other ends and the phasing capacitor C1F other ends, operation
Amplifier T1F anodes connect, the amplitude rectification resistance R5F other ends and operational amplifier T1F cathode, amplitude rectification resistance R9F mono-
End connection, the amplitude rectification resistance R9F other ends are connect with the one end adjustable resistance R10F, and the adjustable resistance R10F other ends are put with operation
Big device T1F output ends connection, operational amplifier T1F operating voltages both ends are connect with DC power supply VCC and VDD respectively.B phases sample
The secondary coil both ends of transformer L4B are connect with the positive and negative anodes of protection pressure-sensitive device D1F respectively.The adjustable resistance R10F other ends and
The output end of operational amplifier T1F is connect with the other end of intelligent controller 1 and residual voltage combined resistance R17.
Corresponding with C phase sampling transformer L4C sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device
D1G anodes, the one end resistance R3G, the place of working for correcting the one end base value resistance R4G, the amplitude rectification one end resistance R5G and working power
Connection, protection pressure-sensitive device D1G cathode and the resistance R3G other ends, the one end correction base value resistance R6G, phasing capacitor C1G
One end connects, and the correction base value resistance R6G other ends are connect with the correction base value resistance R4G other ends, the one end adjustable resistance R7G, can
The resistance R7G other ends are adjusted to be connect with the one end resistance R8G, the resistance R8G other ends and the phasing capacitor C1G other ends, operation
Amplifier T1G anodes connect, the amplitude rectification resistance R5G other ends and operational amplifier T1G cathode, amplitude rectification resistance R9G mono-
End connection, the amplitude rectification resistance R9G other ends are connect with the one end adjustable resistance R10G, and the adjustable resistance R10G other ends are put with operation
Big device T1G output ends connection, operational amplifier T1G operating voltages both ends are connect with DC power supply VCC and VDD respectively.C phases sample
The secondary coil both ends of transformer L4C are connect with the positive and negative anodes of protection pressure-sensitive device D1G respectively.The adjustable resistance R10G other ends and
The output end of operational amplifier T1G is connect with the other end of intelligent controller 1 and residual voltage combined resistance R18.
The accurate sampling theorem of line voltage:A, C phases line voltages warp voltage sampling transformer L1 once decompression again through resistance R2,
Bis- decompressions of transformer L5, in the secondary output of transformer L5, through protecting pressure-sensitive device D1, resistance R3 overvoltage to limit protection
Afterwards, correction base value resistance R6 determines the base value of accuracy correction, amplitude rectification resistance R9 with the resistance value ratio for correcting base value resistance R4
A ratio circuit is formed with adjustable resistance R10 and amplitude rectification resistance R5, operational amplifier T1, by adjusting adjustable resistance
The amplitude error that R10 compensation line voltage samplings generate.Phasing capacitor C1, adjustable resistance R7, resistance R8 and operation amplifier
Device T1 forms a differential circuit, the phase error generated by adjusting adjustable resistance R7 compensation line voltage samplings.Sample line electricity
Press it is calibrated after intelligent controller 1 is connected to by operational amplifier T1 output.
The accurate sampling theorem of phase voltage:A phase voltages UA is through A phase voltage sample resistances R1A decompressions and A phase sampling transformers
L2A electrical isolations(B phase voltages UB is through B phase voltage sample resistances R1B decompressions and B phase sampling transformer L2B electrical isolations, C phase electricity
Press UC through C phase voltage sample resistances R1C decompressions and C phase sampling transformer L2C electrical isolations)Afterwards, through protect pressure-sensitive device D1B,
After the limitation protection of resistance R3B overvoltage, correction base value resistance R6B determines precision with the resistance value ratio for correcting base value resistance R4B
The base value of correction, amplitude rectification resistance R9B and adjustable resistance R10B and amplitude rectification resistance R5B, operational amplifier T1B compositions one
A ratio circuit corrects the amplitude error that phase voltage sampling generates by adjusting adjustable resistance R10B.Phasing capacitor
C1B, adjustable resistance R7B, resistance R8B and operational amplifier T1B form a differential circuit, by adjusting the schools adjustable resistance R7B
The phase error that positive voltage sampling generates.Intelligent control is connected to by operational amplifier T1B outputs after A phase sampling voltages are calibrated
Device 1 and residual voltage combined resistance R11 processed(Intelligent control is connected to by operational amplifier T1B outputs after B phase sampling voltages are calibrated
Intelligent control is connected to by operational amplifier T1B outputs after device 1 and residual voltage combined resistance R12, C phase sampling voltage processed is calibrated
Device 1 and residual voltage combined resistance R13 processed).
The accurate sampling theorem of phase current:A phase currents are after stream and electrical isolation once drop in A phase current sampling mutual inductors L3A
Through bis- drop streams of A phase sampling transformers L4A and electrical isolation(B phase currents through B phase current sampling mutual inductors L3B once drop stream and
Through bis- drop streams of B phase sampling transformers L4B and electrical isolation after electrical isolation, C phase currents are through C phase current sampling mutual inductors L3C
Through bis- drop streams of C phase sampling transformers L4C and electrical isolation after primary drop stream and electrical isolation)Afterwards, through protecting pressure-sensitive device
After D1E, the limitation protection of resistance R3E overvoltage, correction base value resistance R6E is determined with the resistance value ratio for correcting base value resistance R4E
The base value of accuracy correction, amplitude rectification resistance R9E and adjustable resistance R10E and amplitude rectification resistance R5E, operational amplifier T1E groups
At a ratio circuit, the amplitude error that phase current sampling generates is corrected by adjusting adjustable resistance R10E.Phasing capacitance
Device C1E, adjustable resistance R7E, resistance R8E and operational amplifier T1E form a differential circuit, by adjusting adjustable resistance R7E
Correct the phase error that phase current sampling generates.Intelligence is connected to by operational amplifier T1E outputs after A phase sampling currents are calibrated
Controller 1 and residual voltage combined resistance R16(Intelligence is connected to by operational amplifier T1E outputs after B phase sampling currents are calibrated
Intelligence is connected to by operational amplifier T1E outputs after controller 1 and residual voltage combined resistance R17, C phase sampling current are calibrated
Controller 1 and residual voltage combined resistance R18).
The accurate sampling theorem of residual voltage:A, B, C three-phase voltage exist through residual voltage combined resistance R11, R12, R13 respectively
The cathode of operational amplifier T2, which is added, generates residual voltage, through residual voltage amplitude rectification resistance R14, adjustable resistance R15, operation
Intelligent controller 1 is connected to by the output of operational amplifier T2 after the amplitude rectification of amplifier T2 compositions, adjusts adjustable resistance R15
Change output amplitude.
The accurate sampling theorem of zero-sequence current:A, B, C three-phase current exist through zero-sequence current combined resistance R16, R17, R18 respectively
The cathode of operational amplifier T3, which is added, generates zero-sequence current, through zero-sequence current amplitude rectification resistance R19, adjustable resistance R20, operation
Intelligent controller 1 is connected to by the output of operational amplifier T3 after the amplitude rectification of amplifier T3 compositions, adjusts adjustable resistance R20
Change output amplitude.
Ground connection precisely judges principle:The line voltage analog quantity that intelligent controller 1 exports operational amplifier T1A, operation are put
The voltage analog of big device T1B, T1C, T1D output, the phase current analog quantity of operational amplifier T1E, T1F, T1G output, operation
The amplitude and phase of the residual voltage analog quantity of amplifier T2 output and the zero-sequence current analog quantity of operational amplifier T3 outputs into
Digitized processing, on the basis of relevant parameter accurately measures, to precisely judge the shape of high-tension line according to dependency rule
State(Ground connection/earth-free), ground connection it is separate(A phases/B phases/C phases), ground connection position(Mains side/load-side), ground connection property
(Metallic earthing/arc light ground connection), ground connection situation(Earth current size and arc light grounding surge situation).
Intelligent principle:Intelligent controller 1 is sent out by GPRS communication components 4 and is connect on the basis of ground connection precisely judges
Ground status signal, and breaker body component S is carried out by circuit-breaker switching on-off driving and transmission parts 2 according to ground state
Separating brake is grounded protection.Intelligent controller 1 passes through breaker on the basis of gathering line voltage, phase voltage, phase current
Divide-shut brake drives and transmission parts 2, GPRS communication components 4, realizes that measurement, control, protection, signal, telemechanical, self diagnosis etc. are comprehensive
Automation(Or it is intelligent)Function, as with automatic circuit, boundary device etc. in electricity consumption Automation System of Power Network.
Described in this specification above content is only illustrations made for the present invention.Technology belonging to the present invention
The technical staff in field can do various modifications or supplement to described specific embodiment or substitute by a similar method, only
The guarantor of the present invention should all be belonged to without departing from the content or beyond the scope defined by this claim of description of the invention
Protect range.
Claims (7)
1. a kind of outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection, it is characterised in that:Including breaker body portion
Part S, intelligent controller, circuit-breaker switching on-off driving and transmission parts, working power, line voltage sampling transformer L1, A phase voltage
Sample resistance R1A, A phase sampling transformer L2A, B phase voltage sample resistance R1B, B phase sampling transformer L2B, C phase voltage samples
The sampling of resistance R1C, C phase sampling transformer L2C, A phase current sampling mutual inductor L3A, A phase sampling transformer L4A, B phase current is mutual
Sensor L3B, B phase sampling transformer L4B, C phase current sampling mutual inductor L3C, C phase sampling transformer L4C, breaker body component
Be connected on three-phase alternating-current supply UA, UB, UC, the primary coil both ends of line voltage sampling transformer L1 respectively with three-phase alternating current
Source UA, UC connection, secondary coil one end of line voltage sampling transformer L1 are connect with working power and the one end resistance R2, resistance R2
The other end is connect with transformer L5 primary coils one end, the secondary coil other end and the transformer L5 of line voltage sampling transformer L1
The primary coil other end is connected with working power, and working power exports DC power supply VCC and VDD, A phase voltage sample resistances respectively
The one end R1A is connect with three phase mains UA, the primary coil of the A phase voltages sample resistance R1A other ends and A phase sampling transformers L2A
One end connects, the primary coil other end ground connection of A phase sampling transformers L2A, B phase voltages one end sample resistance R1B and three-phase electricity
Source UB connections, the B phase voltages sample resistance R1B other ends are connect with primary coil one end of B phase sampling transformers L2B, and B phases sample
The primary coil other end of transformer L2B is grounded, and C phase voltages one end sample resistance R1C is connect with three phase mains UC, C phase voltages
The sample resistance R1C other ends are connect with primary coil one end of C phase sampling transformers L2C, the primary of C phase sampling transformers L2C
The coil other end is grounded, and A phase current sampling mutual inductors L3A is arranged on three phase mains UA, A phase current sampling mutual inductors L3A two
End is connect with the both ends A phase sampling transformer L4A and one end of A phase current sampling mutual inductor L3A and A phase sampling transformers L4A
Ground connection, B phase current sampling mutual inductors L3B are arranged on three phase mains UB, and the B phase currents both ends sampling mutual inductor L3B are sampled with B phases
The both ends transformer L4B connect and one end of B phase current sampling mutual inductor L3B and B phase sampling transformers L4B ground connection, C phase currents
Sampling mutual inductor L3C is arranged on three phase mains UC, the C phase currents both ends sampling mutual inductor L3C and C phase sampling transformers L4C two
One end ground connection of end connection and C phase current sampling mutual inductor L3C and C phase sampling transformers L4B, transformer L5, A phase sample change
Depressor L2A, B phase sampling transformer L2B, C phase sampling transformer L2C, A phase sampling transformer L4A, B phase sampling transformer L4B, C
The secondary coil of phase sampling transformer L4C and corresponding sampling protection amplitude rectification phase-correcting circuit connection, sampling protection width
The output of value phase calibration correcting circuit is connect with intelligent controller, A phase sampling transformer L2A, B phase sampling transformers L2B, C
The corresponding sampling protection amplitude rectification phase-correcting circuits of phase sampling transformer L2C and residual voltage sampling and amplitude rectification circuit
Amplitude rectification is protected in connection, the corresponding samplings of A phase sampling transformer L4A, B phase sampling transformer L4B, C phase sampling transformers L4C
Phase-correcting circuit is sampled with zero-sequence current and is connect with amplitude rectification circuit, residual voltage sampling and amplitude rectification circuit and zero sequence
Current sampling is connect with the output of amplitude rectification circuit with intelligent controller, circuit-breaker switching on-off driving and transmission parts respectively with
Breaker body component S is connected with intelligent controller controls breaker body component S break-makes by intelligent controller.
2. the outdoor type high-voltage intelligent circuit breaker described in accordance with the claim 1 precisely judged based on ground connection, it is characterised in that:Also
Including GPRS communication components, GPRS communication components are connect with intelligent controller.
3. the outdoor type high-voltage intelligent circuit breaker described in accordance with the claim 1 precisely judged based on ground connection, it is characterised in that:Institute
Stating sampling protection amplitude rectification phase-correcting circuit is:Protect pressure-sensitive device D1 anodes, the one end resistance R3, correction base value resistance R4
The place of working of one end, amplitude rectification one end resistance R5 and working power connects, and protects pressure-sensitive device D1 cathode and resistance R3 another
End, the one end correction base value resistance R6, the connection of the one end phasing capacitor C1, the correction base value resistance R6 other ends and correction base value
The resistance R4 other ends, the connection of the one end adjustable resistance R7, the adjustable resistance R7 other ends are connect with the one end resistance R8, the resistance R8 other ends
It is connect with the phasing capacitor C1 other ends, operational amplifier T1 anodes, the amplitude rectification resistance R5 other ends and operation amplifier
Device T1 cathode, the connection of the one end amplitude rectification resistance R9, the amplitude rectification resistance R9 other ends are connect with the one end adjustable resistance R10, can
Adjust the resistance R10 other ends connect with operational amplifier T1 output ends, operational amplifier T1 operating voltages both ends respectively with direct current
Source VCC is connected with VDD.
4. the outdoor type high-voltage intelligent circuit breaker described in accordance with the claim 1 precisely judged based on ground connection, it is characterised in that:Institute
State residual voltage sampling is with amplitude rectification circuit:Residual voltage combined resistance R11, R12, R13 are in parallel and residual voltage closes
It is connect with operational amplifier T2 cathode, the one end residual voltage amplitude rectification resistance R14 at one end of resistance R11, R12, R13, zero
The sequence voltage amplitude rectification resistance R14 other ends are connect with the one end adjustable resistance R15, the adjustable resistance R15 other ends and operation amplifier
Device T2 output ends are connected with intelligent controller, and operational amplifier T2 anodes connect place of working, operational amplifier T2 operating voltages both ends
It is connect respectively with DC power supply VCC and VDD.
5. the outdoor type high-voltage intelligent circuit breaker described in accordance with the claim 1 precisely judged based on ground connection, it is characterised in that:Institute
State zero-sequence current sampling is with amplitude rectification circuit:Zero-sequence current combined resistance R16, R17, R18 are in parallel and zero-sequence current closes
It is connect with operational amplifier T3 cathode, the one end zero-sequence current amplitude rectification resistance R19 at one end of resistance R16, R17, R18, zero
The sequence current amplitude correction resistance R19 other ends are connect with the one end adjustable resistance R20, the adjustable resistance R20 other ends and operation amplifier
Device T3 output ends are connected with intelligent controller, and operational amplifier T3 anodes connect place of working, operational amplifier T3 operating currents both ends
It is connect respectively with DC power supply VCC and VDD.
6. a kind of control method of the outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection, it is characterised in that:
Line voltage precisely samples:A, C phases line voltages warp voltage sampling transformer L1 is once depressured again through resistance R2, transformer L5
Secondary decompression, in the secondary output of transformer L5, after protecting pressure-sensitive device D1, the limitation protection of resistance R3 overvoltage, correction
The resistance value ratio of base value resistance R6 and correction base value resistance R4 determines the base value of accuracy correction, amplitude rectification resistance R9 and adjustable electric
R10 and amplitude rectification resistance R5, operational amplifier T1 one ratio circuit of composition are hindered, passes through and adjusts adjustable resistance R10 compensation lines
The amplitude error that voltage sampling generates, phasing capacitor C1, adjustable resistance R7, resistance R8 and operational amplifier T1 compositions one
A differential circuit, the phase error generated by adjusting adjustable resistance R7 compensation line voltage samplings, after sampling line voltage is calibrated
Intelligent controller 1 is connected to by operational amplifier T1 outputs;
A phase voltages precisely sample:A phase voltages UA through A phase voltage sample resistances R1A decompression and A phase sampling transformers L2A electrically every
From rear, after protecting pressure-sensitive device D1B, the limitation protection of resistance R3B overvoltage, correction base value resistance R6B and correction base value electricity
The resistance value ratio of resistance R4B determines the base value of accuracy correction, amplitude rectification resistance R9B and adjustable resistance R10B and amplitude rectification resistance
R5B, operational amplifier T1B form a ratio circuit, the width generated by adjusting adjustable resistance R10B compensation line voltage samplings
It is worth error, phasing capacitor C1B, adjustable resistance R7B, resistance R8B and operational amplifier T1B form a differential circuit,
The phase error that phase voltage sampling generates is corrected by adjusting adjustable resistance R7B, by operation amplifier after A phase sampling voltages are calibrated
Device T1B outputs are connected to intelligent controller 1 and residual voltage combined resistance R11;
The accurate sampling of B phase voltages and the accurate sampling of C phase voltages precisely sample identical with A phase voltages;
A phase currents precisely sample:A phase currents once drop stream through A phase current sampling mutual inductors L3A and are taken through A phases with after electrical isolation
After bis- drop streams of sample transformer L4A and electrical isolation, after protecting pressure-sensitive device D1E, the limitation protection of resistance R3E overvoltage,
Correction base value resistance R6E determines the base value of accuracy correction, amplitude rectification resistance R9E with the resistance value ratio for correcting base value resistance R4E
A ratio circuit is formed with adjustable resistance R10E and amplitude rectification resistance R5E, operational amplifier T1E, by adjusting adjustable electric
Hinder the amplitude error that R10E correction phase current samplings generate, phasing capacitor C1E, adjustable resistance R7E, resistance R8E and fortune
It calculates amplifier T1E and forms a differential circuit, the phase error that phase current sampling generates, A are corrected by adjusting adjustable resistance R7E
Intelligent controller 1 and zero-sequence current combined resistance R16 are connected to by operational amplifier T1E outputs after phase sampling current is calibrated;
The accurate sampling of B phase currents and the accurate sampling of C phase currents precisely sample identical with A phase currents;
Residual voltage precisely samples:A, B, C three-phase voltage are respectively through residual voltage combined resistance R11, R12, R13 in operation amplifier
The cathode of device T2, which is added, generates residual voltage, through residual voltage amplitude rectification resistance R14, adjustable resistance R15, operational amplifier T2
Intelligent controller 1 is connected to by the output of operational amplifier T2 after the amplitude rectification of composition, adjustable resistance R15 is adjusted and changes output
Amplitude;
Zero-sequence current precisely samples:A, B, C three-phase current are respectively through zero-sequence current combined resistance R16, R17, R18 in operation amplifier
The cathode of device T3, which is added, generates zero-sequence current, through zero-sequence current amplitude rectification resistance R19, adjustable resistance R20, operational amplifier T3
Intelligent controller 1 is connected to by the output of operational amplifier T3 after the amplitude rectification of composition, adjustable resistance R20 is adjusted and changes output
Amplitude;
Ground connection precisely judges:The line voltage analog quantity that intelligent controller 1 exports operational amplifier T1A, operational amplifier T1B,
The voltage analog of T1C, T1D output, the phase current analog quantity of operational amplifier T1E, T1F, T1G output, operational amplifier T2
The amplitude and phase of the residual voltage analog quantity of output and the zero-sequence current analog quantity of operational amplifier T3 outputs are digitized
Processing, on the basis of relevant parameter accurately measures, to precisely judged according to dependency rule high-tension line state, be grounded
It is separate, ground connection position, ground connection property, the situation of ground connection.
7. a kind of controlling party of the outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection according to claim 6
Method, it is characterised in that:Intelligent process, intelligent controller 1 pass through GPRS communication components 4 on the basis of ground connection precisely judges
Ground state signal is sent out, and is driven with transmission parts 2 to breaker body portion by circuit-breaker switching on-off according to ground state
Part S carries out separating brake, is grounded protection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610557760.1A CN105954675B (en) | 2016-07-15 | 2016-07-15 | The outdoor type high-voltage intelligent circuit breaker and its control method precisely judged based on ground connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610557760.1A CN105954675B (en) | 2016-07-15 | 2016-07-15 | The outdoor type high-voltage intelligent circuit breaker and its control method precisely judged based on ground connection |
Publications (2)
Publication Number | Publication Date |
---|---|
CN105954675A CN105954675A (en) | 2016-09-21 |
CN105954675B true CN105954675B (en) | 2018-10-16 |
Family
ID=56901449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610557760.1A Active CN105954675B (en) | 2016-07-15 | 2016-07-15 | The outdoor type high-voltage intelligent circuit breaker and its control method precisely judged based on ground connection |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105954675B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107015120B (en) * | 2017-05-22 | 2019-08-13 | 江苏现代电力科技股份有限公司 | A kind of ground connection is accurate to judge pilot system |
CN107565512A (en) * | 2017-10-17 | 2018-01-09 | 国网江苏省电力公司南通供电公司 | Outdoor type high-voltage intelligent circuit breaker |
CN110542829A (en) * | 2019-08-15 | 2019-12-06 | 贵州电网有限责任公司 | direct-current grounding judgment device and method for power distribution network below 35kV |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11215688A (en) * | 1998-01-28 | 1999-08-06 | Tokyo Electric Power Co Inc:The | Grounding detector for distribution system, and power receiving and distributing facility using the grounding detector |
CN103779965A (en) * | 2014-01-13 | 2014-05-07 | 江苏现代电力科技股份有限公司 | Integrated high-voltage AC circuit-breaker controller |
CN105703325A (en) * | 2015-06-11 | 2016-06-22 | 陈泽 | Protection circuit and ground fault circuit interrupter |
CN105761975A (en) * | 2016-05-19 | 2016-07-13 | 沈阳工程学院 | Breaker operation device with misoperation preventing function |
CN205861859U (en) * | 2016-07-15 | 2017-01-04 | 江苏现代电力科技股份有限公司 | The outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection |
-
2016
- 2016-07-15 CN CN201610557760.1A patent/CN105954675B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11215688A (en) * | 1998-01-28 | 1999-08-06 | Tokyo Electric Power Co Inc:The | Grounding detector for distribution system, and power receiving and distributing facility using the grounding detector |
CN103779965A (en) * | 2014-01-13 | 2014-05-07 | 江苏现代电力科技股份有限公司 | Integrated high-voltage AC circuit-breaker controller |
CN105703325A (en) * | 2015-06-11 | 2016-06-22 | 陈泽 | Protection circuit and ground fault circuit interrupter |
CN105761975A (en) * | 2016-05-19 | 2016-07-13 | 沈阳工程学院 | Breaker operation device with misoperation preventing function |
CN205861859U (en) * | 2016-07-15 | 2017-01-04 | 江苏现代电力科技股份有限公司 | The outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection |
Also Published As
Publication number | Publication date |
---|---|
CN105954675A (en) | 2016-09-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101563744B (en) | Apparatus and method for compressing exciting inrush current of transformer | |
CN105954675B (en) | The outdoor type high-voltage intelligent circuit breaker and its control method precisely judged based on ground connection | |
US8217536B2 (en) | Magnetizing inrush current suppression device for transformer and control method of same | |
KR20080093169A (en) | Method of leakage current break and measurement leakage current use phase calculation | |
US9425615B2 (en) | Inrush current suppression apparatus | |
CN102623947A (en) | Leakage protector with phase line switching function | |
CN102830287B (en) | Circuit power frequency parameter measuring device capable of eliminating power frequency interference | |
CN102918618B (en) | Transformer inrush current suppression apparatus | |
JP2010073666A (en) | Exciting inrush current suppression device for transformer and its control method | |
EP3084800A1 (en) | Electrical switching apparatus including alternating current electronic trip circuit with arc fault detection circuit and power supply | |
CN205861859U (en) | The outdoor type high-voltage intelligent circuit breaker precisely judged based on ground connection | |
EP0225006A2 (en) | Improved current-sensing arrangement and method for a circuit-interrupter control circuit | |
Ludwinek et al. | Experimental analysis of assessing of the tripping effectiveness of miniature circuit breakers in an electrical installation fed from a synchronous generator set | |
JP2019082462A (en) | OCR tester | |
CN110703146A (en) | Excitation surge current measuring instrument | |
CN206759031U (en) | A kind of improved power plant's low-voltage power supply system ground protection warning device | |
CN202503263U (en) | Leakage protector having phase line switching function | |
JP4562747B2 (en) | Transformer excitation inrush current suppression control method and apparatus | |
RU2684274C1 (en) | Device for monitoring integrity of secondary circuits of current transformers in three-phase networks with isolated neutral | |
CN201985508U (en) | Zero line break protector and connecting structure thereof | |
JP2004015961A (en) | Ground fault interrupter with three-phase phase-failure protector | |
CN105092956B (en) | Power Systems factor measurement apparatus, method and its system | |
JPH0630525A (en) | Three-phase alternating-current power supply apparatus of electronic apparatus | |
CN207504336U (en) | Switchgear | |
CN103311881A (en) | Over-current protection device and method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
CB02 | Change of applicant information |
Address after: Jiangsu province Nantong City Yonghe Road 226005 No. 1188 Applicant after: JIANGSU MODERN POWER CAPACITOR CO., LTD. Address before: 226005 Nantong City, Jiangsu Province modern power road, No. 1 Applicant before: JIANGSU MODERN POWER CAPACITOR CO., LTD. |
|
COR | Change of bibliographic data | ||
GR01 | Patent grant | ||
GR01 | Patent grant |