CN101900780B - Switch cabinet in-cabinet type bus partial discharge real-time detection system - Google Patents
Switch cabinet in-cabinet type bus partial discharge real-time detection system Download PDFInfo
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Abstract
The invention discloses a switch cabinet in-cabinet type bus partial discharge real-time detection system, a temperature, humidity and dust detection module is used for detecting the temperature, the humidity and the dust concentration of a detected part and transmitting a signal to a signal isolation and conditioning module, the signal isolation and conditioning module is used for carrying out pretreatment on a bus partial discharge signal and transmitting to a DSP signal processing module; the DSP signal processing module is used for processing the signal, producing the signal, and transmitting to an output control module; the output control module is used for receiving a control command and controlling an external control device to act; the DSP signal processing module is in communication with an external computer through a communication module; and the DSP signal processing module carries out man-computer interactive communication with a button display module. The switch cabinet in-cabinet type bus partial discharge real-time detection system can detect the bus partial discharge state which does harm to the safe operation of a switch cabinet in a real-time manner, give out a protection signal in time and improve the safety of operation of a power grid.
Description
Technical field
The invention belongs to the mesohigh electrical equipment malfunction and detect and examine end technical field, particularly a kind of system that detects in real time at cabinet type partial discharge phenomenon the Medium Voltage Switchgear bus.
Background technology
Switch cubicle if bus insulation inside exists weakness and defective, then can produce the partial breakdown phenomenon of insulation when work; And bus bulk is if having wedge angle or during the edge of point, will cause electric field to be concentrated, and the phenomenon of shelf depreciation all can appear in the generation of above-mentioned two kinds of situation.When switch cubicle bus partial discharge phenomenon, the lighter causes that equipment work is undesired, the further deterioration of insulation, and weight person then can smash the equipment of switch cubicle, produces serious security incident.
The technology that detects partial discharge phenomenon at present mainly contains: infrared detection technology, ultrasonic detection technology and pulse current detection technique etc.Yet these technological utilizations now all exist various structures or functional defect.Such as: infrared detection, ultrasound examination are subject to environment temperature, neighbourhood noise influence, and sensitivity is not high, and pulse current method needs special high-tension unit etc.In addition, also having a very big problem is to adopt these technology all can't be implemented in cabinet type real-time detection function.Adopt ultrasound wave, infrared detection technology means detection office to put, only be to do regular visit, and can't detect in real time, and some instrument only is suitable for power equipments such as transformer, motor through special instrument.As for pulse current method, it also needs the operation of interrupt switch cabinet when detecting, and applies experimental voltage and extracts the pulse signal that shelf depreciation electric arc, corona cause, its detection means was both time-consuming, caused the loss of partial electric grid interrupt run again.In addition, the technical level to the testing staff requires to be unfavorable for the fast processing fault in-situ also than higher in the testing process.
At present, directly also do not see openly, we can say still blank at home and abroad to the technical scheme that detects in real time at cabinet type switch cubicle bus partial discharge.
Summary of the invention
The invention discloses a kind of switch cubicle at cabinet type bus partial discharge real-time detection system, its be a kind ofly be installed on the switch cubicle, based on the detection system of capacitance coupling type, in real time the shelf depreciation state of bus is monitored.Its signal Processing, analysis part are that the actuation means that is disposed at switch cubicle with routine is designed to one, constitute the complete switch cubicle trouble free service comprehensive protector of a cover.Detection system of the present invention endangers bigger bus shelf depreciation state owing to detecting in real time to the switch cubicle safe operation, and in time provides guard signal, thereby has greatly improved the security of operation of power networks.
The technical scheme that the present invention taked is following: a kind of switch cubicle is at cabinet type bus partial discharge real-time detection system; It comprises temperature, humidity, dust detection module, bus partial discharge detection part, Signal Spacing and conditioning module, DSP signal processing module, button display module, communication module, output control module; Said temperature, humidity, dust detection module detect temperature, humidity and the dust concentration of bus environment, and detection signal is transferred to the DSP signal processing module; Said bus partial discharge detection part detects the bus partial discharge pulse signal; And detection signal transferred to Signal Spacing and conditioning module; Described bus partial discharge detection part comprises high voltage bus (V), bus resistance (Z1), intact medium first electric capacity (Ca), the 5th electric capacity (Co), Hall voltage sensor (U1), second resistance (R2), shelf depreciation equivalence first resistance (r1), Connection Block (J1) between the 4th electric capacity (Cq), detecting electrode plate and the switch cabinet body between second electric capacity (Cb), air gap the 3rd electric capacity (Cc), bus insulation layer outer rim and the detecting electrode plate of connecting with air gap; One end ground connection of high voltage bus (V); Another termination bus resistance (Z1); Bus resistance (Z1) divides two-way to connect second electric capacity (Cb), first electric capacity (Ca) respectively; The other end of second electric capacity (Cb) divides two-way to connect the 3rd electric capacity (Cc), first resistance (r1) respectively; The other end of first electric capacity (Ca), the 3rd electric capacity (Cc), first resistance (r1) converges into one the tunnel and connects the 4th electric capacity (Cq); The other end of the 4th electric capacity (Cq) inserts the Vin+ end of Hall voltage sensor (U1), connects the 5th electric capacity (Co) between the Vin+ end of Hall voltage sensor (U1) and the Vin-end, connecting resistance (R2) between the Iout end of Hall voltage sensor (U1) and the GND end; Hall voltage sensor (U1) connects Connection Block (J1), and the model of Hall voltage sensor (U1) is HV400AD; Said Signal Spacing and conditioning module are carried out pre-service to the bus partial discharge signal, and transfer to the DSP signal processing module; The DSP signal processing module receives signal, and signal is handled, analyzed, and produces control signal, and transfers to output control module; Output control module receives the steering order that the DSP signal processing module sends, to control outside control device action; The DSP signal processing module carries out communication through communication module and outer computer; DSP signal processing module and button display module carry out man-computer interactive communication.
Preferably, temperature, humidity, dust detection module comprise temperature sensor (U2), humidity sensor (U3), dust sensor (U4), and described temperature sensor (U2) detects the bus ambient temperature, near bus; Described humidity sensor (U3) detects the bus ambient humidity; Described dust sensor (U4) detects the environment dust concentration of bus-bar room; The data output sub-signal pin of temperature sensor (U2), humidity sensor (U3), dust sensor (U4) inserts described DSP signal processing module respectively.
Preferably, Signal Spacing and conditioning module comprise operational amplifier (U5), operational amplifier (U5) conditioning bus local discharge signal; The output of operational amplifier (U5) inserts the DSP signal processing module.
Preferably, the button display module comprises first button (S1), second button (S2), the 3rd button (S3), the 4th button (S4), LCD MODULE (M1), and DSP signal processing module (U6) connects the pin of LCD MODULE (M1); The V+ of power module (U1), V-hold parallel connection electrochemical capacitor (C1), the 3rd resistance (R3) and first button (S1), the 4th resistance (R4) and second button (S2) the 5th resistance (R5 and the 3rd button (S3), the 6th resistance (R6) and the 4th button (S4); The 3rd resistance (R3) and first button (S1), the 4th resistance (R4) and second button (S2), the 5th resistance (R5) and the 3rd button (S3), the 6th resistance (R6) and the 4th button (S4) are connected in series respectively, and the connecting line of the 3rd resistance (R3) and first button (S1), the 4th resistance (R4) and second button (S2), the 5th resistance (R5) and the 3rd button (S3), the 6th resistance (R6) and the 4th button (S4) inserts DSP signal processing module (U6) respectively.
Preferably, communication module comprises RS-232 transceiver (U7), 485 transceivers (U8), and RS-232 transceiver (U7), 485 transceivers (U8) constitute the hardware interface of communicating by letter with host computer, with communicating by letter of the scene of realizing and remote computer; RS-232 transceiver (U7), 485 transceivers (U8) connect DSP signal processing module (U6).
Preferably; Output control module comprises photoelectrical coupler (U10); Photoelectrical coupler (U10) carries out electrical isolation to control output signal; The input end of photoelectrical coupler (U10) inserts DSP signal processing module (U6), and the output terminal of photoelectrical coupler (U10) inserts an edge connector (J5), and edge connector (J5) connects external power source.
Preferably, the DSP signal processing module connects calendar clock module (U9), calendar clock module (U9) record trouble time of origin, and preserve.
Preferably, DSP signal processing module parallel connection electric capacity (Y1), the 7th electric capacity (C7) and the 8th electric capacity (C8), the 7th electric capacity (C7) is connected with the 8th electric capacity (C8).
The present invention sets up capacitor model and the corresponding electrical circuits model that bus cashier's office in a shop and induction electroplax are asked; Design bus shelf depreciation is put detection part; This has comprised the solution of induction detection electroplax geometric configuration, material, insulation scheduling theory and technical matters, guarantees that the detection part of design under condition of high voltage will satisfy the requirement of switch cubicle ontological security reliability service.
Pulse capture when secondly, the present invention produces shelf depreciation to bus.Generally at bus insulation in order the time, connect when also reliable, can not produce partial discharge phenomenon, but in case when shelf depreciation occurring, need pick-up unit and signal processing unit can discern the detection striking out rapidly and put pulse signal.
In addition, the anti-environmental change factor of the present invention influences accuracy in detection.In ambient humidity, temperature, will inevitably influence the accuracy of detection of detection part when dust changes, therefore, solve the technical matters that the environmental change factor influences accuracy in detection.Because do not adopt hyperacoustic detection principle, so need not consider the influence of neighbourhood noise to accuracy of detection.
The present invention: 1) to space factors such as the size of high voltage bus and structure, insulating material and size, bus-bar room, design strip detecting electrode plate (referring to Fig. 4).The general employing copper material of this strip detecting electrode plate is to reduce electric field effects.Detecting electrode plate and bus spacing and detecting electrode plate and switch cubicle spacing, according to the condition of air dielectric environment and breakdown field strength, and the factors such as detection (coupling) capacitance size that require design.
2) pounce on based on partial discharge pulse's signal of wavelet transformation and catch and analysis of spectrum.The advantage of wavelet transformation is to pounce on catches transient signal and spectrum analysis, in the process that detects partial discharge pulse's signal in real time, seems by for important.Do key elements such as the intensity that can infer striking out behind the analysis of spectrum and put, position time, cycle to pouncing on the pulse signal of catching.
3) to the research based on the information fusion technology of neural network of partial discharge phenomenon.The bus partial discharge phenomenon can have the comparison confidential relation along with environment temperature, humidity even air sharpness.Information fusion technology influences factor with environment various and carries out information fusion as many inputs parameter of system, and finds out the various relations that influence between the parameters such as factor and partial discharge intensity.
That the technical scheme that switch cubicle of the present invention adopts at cabinet type bus partial discharge real-time detection system at first can realize is real-time, in the bus Partial Discharge Detection function of cabinet.Ability fast detecting, analysis, alarm or protection meet intelligent grid to the intelligentized high request of terminal power equipment when partial discharge phenomenon occurs.And the Partial Discharge Detection modular construction simply, does not need the complex sensing device.For the environment factor that influences accuracy in detection, be easy to detect by the good temperature of price low performance, humidity, dust sensor.And script needs complex hardware to eliminate the problem of environment factor influence, is to lean on high speed microprocessor to solve through software programs such as some signal Processing, information fusion.In fact switch cubicle all need be furnished with actuation means, and this detection system is combined in one with actuation means, therefore, need not increase how many costs.
Description of drawings
Fig. 1 is the theory diagram of switch cubicle of the present invention at cabinet type bus partial discharge real-time detection system.
Fig. 2 is the equivalent circuit diagram of bus partial discharge detection part of the present invention.
Fig. 3 is the circuit diagram of signal Processing of the present invention, analysis and control output.
Fig. 4 is the structural representation of detecting electrode plate.
Among Fig. 2: V: high voltage bus; Z1: bus resistance; Ca: intact dielectric capacitance; Cb: with the air gap series capacitance; Cc: air-gap capacitance; Cq: the electric capacity between bus insulation layer outer rim and the detecting electrode plate; Co: the electric capacity between detecting electrode plate and the switch cabinet body (coupling capacitance); U1: Hall voltage sensor; R2: resistance; R1: shelf depreciation equivalent resistance; J1: Connection Block.
Among Fig. 3: U1: power module; U2: temperature sensor; U3: humidity sensor; U4: dust sensor; U5: operational amplifier; U6: digital signal controller; The U7:RS-232 transceiver; The U8:485 transceiver; U9: calendar clock module; U10: photoelectrical coupler; The U11:5V-24VDC/DC transducer; M1: LCD MODULE; J1-J5: circuit attachment plug seat; S1-S4: button; R1-R15: resistance; C1-C18: electric capacity; W1: precision resistor.
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
As shown in Figure 1, switch cubicle of the present invention comprises temperature, humidity, dust detection module, bus partial discharge detection part, Signal Spacing and conditioning module, DSP signal processing module, button display module, communication module, output control module at cabinet type bus partial discharge real-time detection system.Temperature, humidity, dust detection module detect temperature, humidity and the dust concentration of bus environment, and temperature, humidity, dust detection module connect with DSP, and detection signal is transferred to the DSP signal processing module; The bus partial discharge detection part connects with Signal Spacing and conditioning module, detects the bus partial discharge pulse signal, and detection signal is transferred to Signal Spacing and conditioning module; Signal Spacing and conditioning module connect with the DSP signal processing module, and it carries out pre-service to the bus partial discharge signal, and transfers to the DSP signal processing module; The DSP signal processing module receives signal, and signal is handled, analyzed, and produces control signal, and transfers to output control module; The DSP signal processing module connects output control module, and output control module receives the steering order that the DSP signal processing module sends, to control outside control device action; The DSP signal processing module connects with communication module, and the DSP signal processing module carries out communication through communication module and outer computer; The DSP signal processing module connects with the button display module, and DSP signal processing module and button display module carry out man-computer interactive communication.
Equivalent electrical circuit for bus Partial Discharge Detection part is as shown in Figure 2, and this part circuit comprises: high voltage bus V, bus resistance Z1, intact dielectric capacitance Ca, and air gap series capacitance Cb, air-gap capacitance Cc, bus insulation layer outer rim and detecting electrode plate (Fig. 4) between capacitor C q, detecting electrode plate and switch cabinet body between capacitor C o, Hall voltage sensor U1, resistance R 2, shelf depreciation equivalent resistance r1, Connection Block J1 (AWG-4).The structure and material of the component parameter of this part circuit and bus structure, material and detecting electrode plate, environment etc. are relevant, and difference is also all arranged in the switch cubicle of different stage.In the present embodiment, R2 is 10 Europe resistance, and U1 is Hall voltage sensor (model HV400AD).
High voltage bus V, bus resistance Z1, intact dielectric capacitance Ca, with the annexation of air gap series capacitance Cb, air-gap capacitance Cc, shelf depreciation equivalent resistance r1 be the equivalent electrical circuit annexation when the bus insulation material occurring and have air gap to cause shelf depreciation.The end ground connection of high voltage bus V; Another termination bus resistance Z1, bus resistance Z1 divides two-way to meet capacitor C b, capacitor C a respectively, and the other end of capacitor C b divides two-way to meet capacitor C c, resistance r1 respectively; The other end of capacitor C a, capacitor C c, resistance r1 converges into one the tunnel and connects capacitor C q; The other end of capacitor C q inserts the Vin+ end of Hall voltage sensor U1, meets capacitor C o between the Vin+ end of Hall voltage sensor U1 and the Vin-end, the Vin-end ground connection of Hall voltage sensor U1.Connecting resistance R2 between the Iout end of Hall voltage sensor U1 and the GND end, 1 pin of the GND termination Connection Block J1 of Hall voltage sensor U1,2 pin of Iout termination Connection Block J1,3 pin of+24V termination Connection Block J1.
Cq (electric capacity between bus insulation layer outer rim and the detecting electrode plate) and Co (electric capacity between detecting electrode plate and the switch cabinet body) when near bus, introducing the detecting electrode plate, have been produced.When going out current situation and put, air-gap capacitance Cc has discharge pulse current, and this Pulse Electric fails to be convened for lack of a quorum and causes the bus leakage current, and this part electric current spontaneous current is through capacitor C o, and capacitor C o produces voltage signal; The input of Hall voltage sensor U1 connects the voltage signal that put with detection office at capacitor C o two ends; The effect of resistance R 2 is the voltage signals that the 4-20mA electric current output of Hall voltage sensor U1 converted to 40mV-200mV.
1,2, the 3 pin correspondences of Connection Block J1 are received on 1,2,3 pin of edge connector J2 among Fig. 3, introduce and signal output as the power supply of U1 among Fig. 2.
Circuit part for signal Processing, analysis and control output is as shown in Figure 3.
This part circuit comprises: power module U1 (model DFA10-05W), temperature sensor U2 (model DS18B20), humidity sensor U3 (model SH1100), dust sensor U4 (model M216553), operational amplifier U5 (model TLC2272), digital signal controller U6 (being the DSP signal processing module, model dsPIC30F6012A), RS-232 transceiver U7 (model MAX232), 485 transceiver U8 (model MAX483), calendar clock module U9 (model DS12C887), photoelectrical coupler U10 (model TLP521-4), 5V-24VDC/DC transducer U11 (model: MAX773), LCD MODULE M1 (model C M12684), circuit attachment plug seat J1 (AWG-2), J2 (AWG-4), J3 (AWG-3), J4 (AWG-2), J5 (AWG-6), button S1-S4 (AN-2), resistance R 2-R6 (4.7K1/4W), resistance R 11-R15 (4.7K1/4W), resistance R 1 (10K1/4W metal film), R9 (510K1/4W resistance), resistance R 7 (51K1/4W metal film), resistance R 8 (1M1/4W metal film), resistance R 10 (120 Ω 1/4W), electrochemical capacitor C1 (1000uF/16V), electrochemical capacitor C3-C6 (0.1uF/16V), ROHS C2, C9-C18 (104/25V), ROHS C7, C8 (20/25V), precision resistor W1 (51K).
The AC (3) that 1 pin of circuit attachment plug seat J1,2 pin insert power module U1 respectively, AC (1) input end; The V-of power module U1 (4) holds ground connection; V+ (2) termination is gone into VDD (10), AVDD (19), the VDD (26) of digital signal controller U6; Also through MCLR (7) end of resistance R 2 incoming digital signal controller U6, the MCLR of digital signal controller U6 (7) end is through capacitor C 2 ground connection for the V+ end.The Vss of digital signal controller U6 (9), AVSS (20), Vss (25) ground connection.
The V+ of power module U1 (2), V-(4) end parallel connection electrochemical capacitor C1, resistance R 3 and button S1, resistance R 4 and button S2, resistance R 5 and button S3, resistance R 6 and button S4; Resistance R 3 is connected in series respectively with button S1, resistance R 4 and button S2, resistance R 5 and button S3, resistance R 6 and button S4, and the connecting line of resistance R 3 and button S1, resistance R 4 and button S2, resistance R 5 and button S3, resistance R 6 and button S4 is RG9 (8), RG8 (6), RG7 (5), the RG6 (4) of incoming digital signal controller U6 respectively.
The output of the V+ of power module U1 (2) power supply is also connected to the power end of temperature sensor U2, humidity sensor U3, dust sensor U4, operational amplifier U5, RS-232 transceiver U7,485 transceiver U8, calendar clock module U9, LCD MODULE M1, and V-(4) output terminal is connected to VSS or the GND earth terminal of U2-U9.
The data output sub-signal pin of temperature sensor U2, humidity sensor U3, dust sensor U4 meets T2CK (2), T3CK (3), the AN8 (21) of digital signal controller U6 respectively.
OUT B (7) output of operational amplifier U5 meets the AN9 (22) of digital signal controller U6; Connecting resistance R8 between OUT B (7) and the IN B-(6); Connecting resistance R9 between OUT A (1) and the IN B-(6), 3 pin of edge connector J2 are inserted in OUT A (1) serial connection precision positioner W1, resistance R 7, resistance R 1 back.The connecting line of resistance R 1 and resistance R 7 also inserts the IN A-(2) of operational amplifier U5.
The U2RX of digital signal controller U6 (31), U2TX (32) meet R1out (12), the Tlin (11) of RS-232 transceiver U7.Meet electric capacity R4 between the C1+ (1) of RS-232 transceiver U7 and the C1-(3), connect capacitor C 5 between C2+ (4) and the C2-(5), connect capacitor C 3 between V+ (2) and the Vcc (16), connect capacitor C 6 between V-(6) and the ground.Tlout (14), Rlin (13) insert 1,2 pin of edge connector J3 respectively.
The U1RX of digital signal controller U6 (34), U1TX (33) meet RO (1), the DI (4) of 485 transceiver U8, and the RC13 of digital signal controller U6 (47) inserts RE (2), the DE (3) of 485 transceiver U8.The A of 485 transceiver U8 (6) end, B (7) end insert 2 pin, 1 pin of edge connector J4 respectively, insert resistance R 10 between A (6) end and B (7) end.
Parallel connection electric capacity Y1, capacitor C 7 and capacitor C 8 between the RC5 of digital signal controller U6 (40), CLKI (39), capacitor C 7 is connected with capacitor C 8.
The RD0-RD7 of digital signal controller U6 (46,49,50,51,52,53,54,55) meets the data line AD0-AD7 (4,5,6,7,8,9,10,11) of calendar clock module U9, the data line DB0-DB7 (10,11,12,13,14,15,16,17) of LCD MODULE M1 respectively as data bus.
The look-at-me line IRQ (19) of calendar clock module U9 connects external interrupt input INT1 (42) pin of digital signal controller U6.The RESET (18) of calendar clock module U9 and VCC (24) indirect resistance R13, RESET (18) is through capacitor C 9 ground connection.The RESET of LCD MODULE M1 (9) is also through capacitor C 9 ground connection.
The RC14 of digital signal controller U6 (48), RG2 (37), RG3 (36), RF6 (35) connect CD (8), CE (7), RD (6), WR (5) pin of LCD MODULE M1 respectively as sheet choosing, the read-write of LCD MODULE M1.
The RB11-RB14 of digital signal controller U6 (24,27,28,29) connects DC (17), W/R (15), AS (14), CS (13) pin of calendar clock module U9 respectively as signals such as the sheet choosing of calendar clock module U9, read-writes.
The RG0 of digital signal controller U6 (61), RG12 (63), RG13 (64), RG14 (62) connect the input end of photoelectrical coupler U10 respectively as control output (temperature, humidity, isolating switch etc.) signal through R11, R12, R14, R15, the output terminal of photoelectrical coupler U10 inserts 6,5,4,3 pin and the ground connection of edge connector J5.1,2 pin of edge connector J5 connect external power source.
Capacitor C 10-C18 is connected on each chip respectively (between the power supply and ground of U1～U9).
Power module U1 produces the 5V direct current with the direct rectification of the alternating current of 220V through voltage stabilizing, supplies with entire circuit work, and it is a switch power module.Temperature sensor U2 detects the bus ambient temperature, near bus.Humidity sensor U3 detects the bus ambient humidity.Dust sensor U4 detects the environment dust concentration of bus-bar room.Operational amplifier U5 conditioning bus local discharge signal, about 20 times of its enlargement factor.Digital signal controller U6 is the core component of circuit, gathers signal and bus local discharge signal from each sensor, the computing of simultaneously signal being handled and being analyzed, and output control signal corresponding.RS-232 transceiver U7,485 transceiver U8 constitute the hardware interface of communicating by letter with host computer, with communicating by letter of the scene of realizing and remote computer.Calendar clock module U9 record trouble time of origin, and preserve.Photoelectrical coupler U10 carries out electrical isolation to control output signal, prevents the counter-jamming and the electrical damage of external control device.Button S1-S4 and LCD MODULE M1 are man-machine interfaces, and system is carried out parameter setting and monitored state.Resistance R 2-R6 is the pull-up resistor of button, and when keeping button not press, the level of being defeated by digital signal controller U6 is a high level.Resistance R 11-R15 is the photoelectrical coupler current-limiting resistance.Resistance R 1, R9, R7, R8, precision resistor W1 be amplifier enlargement factor set up resistance.Resistance R 10 is the configuration resistance of 485 transceiver U8.Electrochemical capacitor C1 is to power filter.Electrochemical capacitor C3-C6 is the configuration electric capacity of RS-232 transceiver U7.ROHS C10-C18 is the decoupling capacitance of each chip.ROHS C7, C8 and Y1 constitute the crystal oscillating circuit of digital signal controller U6.Resistance R 2, capacitor C 2, resistance R 13, capacitor C 9 are respectively the electrify restoration circuits of digital signal controller U6, precision resistor M1, calendar clock module U9.Circuit attachment plug seat J1-J5 connects drawing of the drawing of AC power, bus partial discharge testing circuit, RS-232 transceiver, 485 transceivers, control signal respectively.
More than preferred implementation of the present invention is specified; Corresponding those of ordinary skill in the art; According to thought provided by the invention, the part that on concrete embodiment of the present invention and range of application, all can change, these changes also should be regarded as protection scope of the present invention.In sum, this description should not be construed as the restriction to protection domain of the present invention.
Claims (8)
1. a switch cubicle is at cabinet type bus partial discharge real-time detection system; It is characterized in that: comprise temperature, humidity, dust detection module, bus partial discharge detection part, Signal Spacing and conditioning module, DSP signal processing module, button display module, communication module, output control module; Said temperature, humidity, dust detection module detect temperature, humidity and the dust concentration of bus environment, and detection signal is transferred to the DSP signal processing module; Said bus partial discharge detection part detects the bus partial discharge pulse signal; And detection signal transferred to Signal Spacing and conditioning module; Described bus partial discharge detection part comprises high voltage bus (V), bus resistance (Z1), intact medium first electric capacity (Ca), the 5th electric capacity (Co), Hall voltage sensor (U1), second resistance (R2), shelf depreciation equivalence first resistance (r1), Connection Block (J1) between the 4th electric capacity (Cq), detecting electrode plate and the switch cabinet body between second electric capacity (Cb), air gap the 3rd electric capacity (Cc), bus insulation layer outer rim and the detecting electrode plate of connecting with air gap; One end ground connection of high voltage bus (V); Another termination bus resistance (Z1); Bus resistance (Z1) divides two-way to connect second electric capacity (Cb), first electric capacity (Ca) respectively; The other end of second electric capacity (Cb) divides two-way to connect the 3rd electric capacity (Cc), first resistance (r1) respectively; The other end of first electric capacity (Ca), the 3rd electric capacity (Cc), first resistance (r1) converges into one the tunnel and connects the 4th electric capacity (Cq); The other end of the 4th electric capacity (Cq) inserts the Vin+ end of Hall voltage sensor (U1), connects the 5th electric capacity (Co) between the Vin+ end of Hall voltage sensor (U1) and the Vin-end, connecting resistance (R2) between the Iout end of Hall voltage sensor (U1) and the GND end; Hall voltage sensor (U1) connects Connection Block (J1), and the model of Hall voltage sensor (U1) is HV400AD; Said Signal Spacing and conditioning module are carried out pre-service to the bus partial discharge signal, and transfer to the DSP signal processing module; The DSP signal processing module receives signal, and signal is handled, analyzed, and produces control signal, and transfers to output control module; Output control module receives the steering order that the DSP signal processing module sends, to control outside control device action; The DSP signal processing module carries out communication through communication module and outer computer; DSP signal processing module and button display module carry out man-computer interactive communication.
2. switch cubicle as claimed in claim 1 is at cabinet type bus partial discharge real-time detection system; It is characterized in that: described temperature, humidity, dust detection module comprise temperature sensor (U2), humidity sensor (U3), dust sensor (U4); Described temperature sensor (U2) detects the bus ambient temperature, near bus; Described humidity sensor (U3) detects the bus ambient humidity; Described dust sensor (U4) detects the environment dust concentration of bus-bar room; The data output sub-signal pin of temperature sensor (U2), humidity sensor (U3), dust sensor (U4) inserts described DSP signal processing module respectively.
3. according to claim 1 or claim 2 switch cubicle is at cabinet type bus partial discharge real-time detection system, and it is characterized in that: described Signal Spacing and conditioning module comprise operational amplifier (U5), operational amplifier (U5) conditioning bus local discharge signal; The output of operational amplifier (U5) inserts the DSP signal processing module.
4. switch cubicle as claimed in claim 1 is at cabinet type bus partial discharge real-time detection system; It is characterized in that: described button display module comprises first button (S1), second button (S2), the 3rd button (S3), the 4th button (S4), LCD MODULE (M1), and DSP signal processing module (U6) connects the pin of LCD MODULE (M1); The V+ of power module (U1), V-hold parallel connection electrochemical capacitor (C1), the 3rd resistance (R3) and first button (S1), the 4th resistance (R4) and second button (S2) the 5th resistance (R5 and the 3rd button (S3), the 6th resistance (R6) and the 4th button (S4); The 3rd resistance (R3) and first button (S1), the 4th resistance (R4) and second button (S2), the 5th resistance (R5) and the 3rd button (S3), the 6th resistance (R6) and the 4th button (S4) are connected in series respectively, and the connecting line of the 3rd resistance (R3) and first button (S1), the 4th resistance (R4) and second button (S2), the 5th resistance (R5) and the 3rd button (S3), the 6th resistance (R6) and the 4th button (S4) inserts DSP signal processing module (U6) respectively.
5. switch cubicle as claimed in claim 1 is at cabinet type bus partial discharge real-time detection system; It is characterized in that: described communication module comprises RS-232 transceiver (U7), 485 transceivers (U8); RS-232 transceiver (U7), 485 transceivers (U8) constitute the hardware interface of communicating by letter with host computer, with communicating by letter of the scene of realizing and remote computer; RS-232 transceiver (U7), 485 transceivers (U8) connect DSP signal processing module (U6).
6. switch cubicle as claimed in claim 1 is at cabinet type bus partial discharge real-time detection system; It is characterized in that: described output control module comprises photoelectrical coupler (U10); Photoelectrical coupler (U10) carries out electrical isolation to control output signal; The input end of photoelectrical coupler (U10) inserts DSP signal processing module (U6), and the output terminal of photoelectrical coupler (U10) inserts an edge connector (J5), and edge connector (J5) connects external power source.
7. switch cubicle as claimed in claim 1 is characterized in that at cabinet type bus partial discharge real-time detection system: described DSP signal processing module connects calendar clock module (U9), calendar clock module (U9) record trouble time of origin, and preserve.
8. switch cubicle as claimed in claim 1 is at cabinet type bus partial discharge real-time detection system; It is characterized in that: described DSP signal processing module parallel connection electric capacity (Y1), the 7th electric capacity (C7) and the 8th electric capacity (C8), the 7th electric capacity (C7) is connected with the 8th electric capacity (C8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101512530A CN101900780B (en) | 2010-04-20 | 2010-04-20 | Switch cabinet in-cabinet type bus partial discharge real-time detection system |
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| CN2010101512530A CN101900780B (en) | 2010-04-20 | 2010-04-20 | Switch cabinet in-cabinet type bus partial discharge real-time detection system |
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| CN101900780A CN101900780A (en) | 2010-12-01 |
| CN101900780B true CN101900780B (en) | 2012-06-27 |
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| CN2010101512530A Expired - Fee Related CN101900780B (en) | 2010-04-20 | 2010-04-20 | Switch cabinet in-cabinet type bus partial discharge real-time detection system |
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| CN103017818B (en) * | 2012-08-09 | 2015-05-20 | 江苏科技大学 | System and method for fault diagnosis of intelligent switchgears |
| CN103176110B (en) * | 2013-02-01 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | A kind of partial discharge detection test platform of medium-voltage switch cabinet |
| CN103197210B (en) * | 2013-03-28 | 2015-07-08 | 国家电网公司 | Integrated sensor used for partial discharge detection of switch cabinet |
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| CN107588801A (en) * | 2017-09-04 | 2018-01-16 | 安徽科盟电子科技有限公司 | A kind of long-range self-diagnosis system of electrical equipment fault |
| CN107505009A (en) * | 2017-10-12 | 2017-12-22 | 威腾电气集团股份有限公司 | A kind of high-low pressure bus on-Line Monitor Device |
| CN109632009A (en) * | 2019-01-21 | 2019-04-16 | 国网江西省电力有限公司宜春供电分公司 | A fault monitoring system and determination method for a switch cabinet |
| CN110703058A (en) * | 2019-11-06 | 2020-01-17 | 中研新科智能电气有限公司 | Partial discharge detection method and device based on ultrasonic recognition and terminal |
| CN113611095A (en) * | 2021-06-17 | 2021-11-05 | 山西三友和智慧信息技术股份有限公司 | Network equipment control platform based on artificial intelligence |
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