CN106199311A - A kind of ground detection device and How It Works - Google Patents
A kind of ground detection device and How It Works Download PDFInfo
- Publication number
- CN106199311A CN106199311A CN201610556075.7A CN201610556075A CN106199311A CN 106199311 A CN106199311 A CN 106199311A CN 201610556075 A CN201610556075 A CN 201610556075A CN 106199311 A CN106199311 A CN 106199311A
- Authority
- CN
- China
- Prior art keywords
- screen monitor
- main screen
- bus
- resistance
- branch road
- 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.)
- Withdrawn
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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of ground detection device and How It Works, including the first main screen monitor, multiple stage the second main screen monitor, multiple stage the first split screen monitor and the second split screen monitor, multiple stage the second main screen monitor, multiple stage the first split screen monitor and the second split screen monitor all with the first main screen monitor pass through connection, first main screen monitor and multiple stage the second main screen monitor both positive and negative polarity with a plurality of bus respectively is connected, multiple stage the first split screen monitor also corresponding both positive and negative polarity with a plurality of bus respectively is connected, the second selectable and a plurality of bus of split screen monitor is positive and negative to be connected；First main screen monitor, multiple stage the second main screen monitor, multiple stage the first split screen monitor and the second equal ground connection of split screen monitor.Hinge structure, the present invention can detect the insulation status of two sections of buses and sum less than the ground connection situation of 96 branch roads, can multiple stage networking operation, complete the on-line monitoring of many direct currents split screen straight-flow system insulation against ground situation.
Description
Technical field
The present invention relates to current system in hydropower station technical field, particularly to a kind of ground detection device.
Background technology
In order to ensure that the safe and reliable operation of straight-flow system must carry out on-line monitoring to its insulation situation, when certain point is sent out
During raw earth fault, alarm signal can be sent immediately and indicate fault branch.The straight-flow system in power plant is more complicated, and direct current divides
Screen quantity is many, and dispersed placement, and is often provided with public split screen, therefore, it is also proposed higher wanting to the detection of its ground insulation
Ask.
Summary of the invention
The technical problem to be solved is to provide a kind of insulation status that can detect two sections of buses and sum not
More than the ground connection situation of 96 branch roads, can multiple stage networking operation, complete many direct currents split screen straight-flow system insulation against ground situation
The ground detection device of line monitoring and How It Works.
The technical scheme is that a kind of ground detection device, it is used for direct current power
The insulation situation of system carries out on-line monitoring, including the first main screen monitor, multiple stage the second main screen monitor, multiple stage the first split screen
Monitor and the second split screen monitor；
Described in multiple stage, the second main screen monitor, multiple stage the first split screen monitor and the second split screen monitor are all with described first
Main screen monitor by connection, described first main screen monitor and multiple stage the second main screen monitor respectively with a plurality of bus
Both positive and negative polarity connect, multiple stage the first split screen monitor also corresponding both positive and negative polarity with a plurality of bus respectively is connected, described second split screen
Selectable and a plurality of bus of monitor is positive and negative to be connected；And described first main screen monitor, multiple stage the second main screen monitor, multiple stage
First split screen monitor and the second equal ground connection of split screen monitor；
Described first main screen monitor, it detects for the voltage-to-ground that bus is positive and negative, DC leakage current detects and branch road
Leakage current detect, and aggregation process its detection signal and multiple stage described in the second main screen monitor, multiple stage the first split screen monitoring
Instrument, detection voltage-to-ground detection signal, DC leakage current detection signal and the branch road leakage current of the second split screen monitor transmission
Detection signal；
Second main screen monitor described in multiple stage, be used to bus positive and negative voltage-to-ground detection, DC leakage current detection and
Branch road leakage current detects, and by voltage-to-ground detection, DC leakage current detection and the detection signal of branch road leakage current detection
It is transferred to described first main screen monitor；
First split screen monitor described in multiple stage and described second split screen monitor, be used to the detection of bus positive and negative voltage-to-ground
Detect with branch road leakage current, and the detection signal of voltage-to-ground detection and the detection of branch road leakage current is transferred to described first
Main screen monitor.
Further, described multiple stage the second main screen monitor, multiple stage the first split screen monitor and the string of the second split screen monitor
Mouth 2 is sequentially connected with by circuit, and described circuit accesses in the serial ports 2 of described first main screen monitor.
Further, described first main screen monitor and multiple stage the second main screen monitor all include voltage detection module, direct current
Electric leakage module and judge earth fault branch road module, described voltage detection module, DC leakage module and judge that earth fault is propped up
Road module is all connected with described bus both positive and negative polarity；
Described voltage detection module, it is for detecting bus voltage between positive and negative, the second main screen monitor
Voltage detection module is transferred to the first main screen monitor by serial ports 2；
Described DC leakage module, its DC leakage between positive and negative to bus detects, the second main screen monitor
DC leakage module be transferred to the first main screen monitor by serial ports 2；
Described judgement earth fault branch road module, it is for judging the branch road of bus electric leakage, the second main screen monitoring
The judgement earth fault branch road module of instrument is transferred to the first main screen monitor by serial ports 2.
The invention has the beneficial effects as follows: for without split screen straight-flow system, ground detection device can be used alone；For many
Split screen straight-flow system also can use in the networking of many table apparatus；For the earthing detection of many split screens straight-flow system, device is by simple
Parameter arranges and is configured to main screen monitor or split screen monitor, selects a main screen monitor for every section of bus, and other is all set to
Split screen monitor；Main screen monitor had both detected the earth resistance of place bus, detected the earth resistance of the connect branch road of the machine again；
Split screen monitor only detects the earth resistance of the connect branch road of the machine；The monitor of multimachine networking operation can be applied for entering manual shape
State, other monitor all enters off-line state simultaneously, makes to only have in straight-flow system an earthing monitor, can manually boot comprehensive
The legal detection carrying out two sides earth；This device adapts to different straight-flow systems, and detection is accurately.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described first split screen monitor and the second split screen monitor all include voltage detection module and judge ground connection
Fault branch module, described voltage detection module and judge that earth fault branch road module is all connected with described bus both positive and negative polarity；
Described voltage detection module, it is for detecting bus voltage between positive and negative, and is passed through by detection signal
Serial ports 2 is transferred to the first main screen monitor；
Described judgement earth fault branch road module, it is for judging the branch road of bus electric leakage, and will detect signal
It is transferred to the first main screen monitor by serial ports 2.
Further, described voltage detection module includes one end of resistance R1～R4 and switch S1～S2, described switch S1 even
Connecing the positive pole of bus, the other end of described switch S1 passes through resistance R1, R3 ground connection, and one end of described switch S2 connects the negative of bus
Pole, the other end of described switch S2 passes through resistance R2, R4 ground connection.
Further, described DC leakage module includes that one end of resistance R5～R6 and switch S3, described resistance R5 connects mother
The positive pole of line, one end of described resistance R6 connects the negative pole of bus, the other end of described resistance R5 and the other end phase of resistance R6
Connect, and be connected with one end of switch S3, the other end ground connection of described switch S3.
Further, described DC leakage module includes one end of resistance R7～R12 and switch S4～S7, described resistance R7 even
Connecing the positive pole of bus, one end of described resistance R8 connects the negative pole of bus, another of the other end of described resistance R7 and resistance R8
End is connected, and is connected with one end of switch S4, the other end ground connection of described switch S4；
One end of described resistance R9 connects the positive pole of bus, and one end of described resistance R10 connects the negative pole of bus, described electricity
The other end of resistance R9 is connected with the other end of resistance R10, and is connected with one end of switch S5, another termination of described switch S5
Ground；
One end of described resistance R11 connects bus positive pole, and the other end is connected with one end of described switch S6, described switch S6
Other end ground connection；
One end of described resistance R12 connects bus negative pole, and the other end is connected with one end of described switch S7, described switch S7
Other end ground connection.
Further, described judgement earth fault branch road module include two DC leakage flow sensor and resistance R13～
R14, one end of two described DC leakage flow sensor connects bus both positive and negative polarity, two described DC leakage flow sensor respectively
The other end connect with described resistance R13 and resistance R14 respectively ground connection.
Further, described resistance R1～R4 is provided with remote measurement setting function.
The How It Works of a kind of ground detection device, comprises the following steps:
Step S1. the second main screen monitor, the first split screen monitor and the second split screen monitor all to bus over the ground electricity
Pressure detection, DC leakage current detection and the detection of branch road leakage current, and send detection signal to the first main screen monitor respectively；
Step S2. the first main screen monitor is detected signal and the second main screen monitor, the first split screen monitor and
The detection signal that the transmission of 2 panes monitor comes carries out aggregation process；
The aggregation process of step S2 is detected signal by serial ports 1 and is transferred to outside straight by step S3. the first main screen monitor
Stream screen monitoring unit.
Further, described step S1 comprises the following steps:
The voltage detection module of step S11. the second main screen monitor, the first split screen monitor and the second split screen monitor is closed
Combination switch S1 and S2, detection bus or the positive and negative voltage-to-ground of branch line, and right to the first main screen monitor transmission by serial ports 2
Ground voltage detection signal；
Step S12. the second main screen monitor DC leakage module regulation bus offset voltage, to bus positive and negative between
DC leakage detects, and by serial ports 2 to the first main screen monitor transmission DC leakage detection signal；
Step S13. judges that earth fault branch road module flows through, by branch road, the magnetic that two DC leakage flow sensor produce
Field changing value, judges the branch road of electric leakage, and by serial ports 2, branch road leakage current detection signal is transferred to the first main screen
Monitor.
The invention has the beneficial effects as follows: for without split screen straight-flow system, ground detection device can be used alone；For many
Split screen straight-flow system also can use in the networking of many table apparatus；For the earthing detection of many split screens straight-flow system, device is by simple
Parameter arranges and is configured to main screen monitor or split screen monitor, selects a main screen monitor for every section of bus, and other is all set to
Split screen monitor；Main screen monitor had both detected the earth resistance of place bus, detected the earth resistance of the connect branch road of the machine again；
Split screen monitor only detects the earth resistance of the connect branch road of the machine；The monitor of multimachine networking operation can be applied for entering manual shape
State, other monitor all enters off-line state simultaneously, makes to only have in straight-flow system an earthing monitor, can manually boot comprehensive
The legal detection carrying out two sides earth；This device adapts to different straight-flow systems, and detection is accurately.
Accompanying drawing explanation
Fig. 1 is one ground detection device schematic diagram of the present invention；
Fig. 2 is the circuit theory diagrams of main screen monitor；
Fig. 3 is the circuit theory diagrams of split screen monitor；
Fig. 4 is the circuit theory diagrams of monitor.
In accompanying drawing, the list of parts representated by each label is as follows:
11, the first main screen monitor, the 12, second main screen monitor；
21, the first split screen monitor, the 22, second split screen monitor；
3, voltage detection module, 4, DC leakage module, 5, judge earth fault branch road module.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
Non-for limiting the scope of the present invention.
Embodiment 1:
As shown in Figures 1 to 4, a kind of ground detection device, it is supervised online for the insulation situation of direct current power system
Survey, supervise including the first main screen monitor 11, multiple stage the second main screen monitor 12, multiple stage the first split screen monitor 21 and the second split screen
Survey instrument 22；
Second main screen monitor 12 described in multiple stage, multiple stage the first split screen monitor 21 and the second split screen monitor 22 are all and institute
State the first main screen monitor 11 by connection, described first main screen monitor 11 and multiple stage the second main screen monitor 12 points
Be not connected with the both positive and negative polarity of a plurality of bus, multiple stage the first split screen monitor 21 also corresponding respectively with the both positive and negative polarity of a plurality of bus even
Connecing, the described second selectable and a plurality of bus of split screen monitor 22 is positive and negative to be connected；And described first main screen monitor 11, multiple stage
Second main screen monitor 12, multiple stage the first split screen monitor 21 and the second equal ground connection of split screen monitor 22；
Described first main screen monitor 11, it detects for the voltage-to-ground that bus is positive and negative, DC leakage current detects and props up
The detection of road leakage current, and the second main screen monitor 12, multiple stage the first split screen described in its detection signal of aggregation process and multiple stage
Detection voltage-to-ground detection signal, DC leakage current detection signal and the branch road of monitor the 21, second split screen monitor 22 transmission
Leakage current detection signal；
Second main screen monitor 12 described in multiple stage, is used to the positive and negative voltage-to-ground detection of bus, DC leakage current detection
Detect with branch road leakage current, and by the detection letter of voltage-to-ground detection, DC leakage current detection and the detection of branch road leakage current
Number it is transferred to described first main screen monitor 11；
First split screen monitor 21 described in multiple stage and described second split screen monitor 22, be used to the positive and negative voltage-to-ground of bus
Detection and branch road leakage current detect, and are transferred to described by the detection signal of voltage-to-ground detection and the detection of branch road leakage current
First main screen monitor 11.
Setting the first main screen monitor 11 is communication host, and multiple stage the second main screen monitor 12, multiple stage the first split screen are monitored
Instrument 21 and the second split screen monitor 22 are all set to communication slave；All communication slaves are all by the serial ports 2 of serial ports 2 with communication host
Connect in the way of RS485 bus；Communication host collects the information of each communication slave, and single with direct current cabinet monitoring by serial ports 1
Unit or background computer connect, and are uploaded by full detail.
Described multiple stage the second main screen monitor 12, multiple stage the first split screen monitor 21 and the serial ports of the second split screen monitor 22
2 are sequentially connected with by circuit, and described circuit accesses in the serial ports 2 of described first main screen monitor 11.
Described first main screen monitor 11 and multiple stage the second main screen monitor 12 all include that voltage detection module 3, direct current leak
Electricity module 4 and judge earth fault branch road module 5, described voltage detection module 3, DC leakage module 4 and judge earth fault
Branch road module 5 is all connected with described bus both positive and negative polarity；
Described voltage detection module 3, it is for detecting bus voltage between positive and negative, the second main screen monitor 12
Voltage detection module 3 be transferred to the first main screen monitor 11 by serial ports 2；
Described DC leakage module 4, its DC leakage between positive and negative to bus detects, the second main screen monitor
The DC leakage module 4 of 12 is transferred to the first main screen monitor 11 by serial ports 2；
Described judgement earth fault branch road module 5, it is for judging the branch road of bus electric leakage, the second main screen monitoring
The judgement earth fault branch road module 5 of instrument 12 is transferred to the first main screen monitor 11 by serial ports 2.
Described first split screen monitor 21 and the second split screen monitor 22 all include voltage detection module 3 and judge ground connection event
Barrier branch road module 5, described voltage detection module 3 and judge that earth fault branch road module 5 is all connected with described bus both positive and negative polarity,
Described voltage detection module 3, it is for detecting bus voltage between positive and negative, and is passed through by detection signal
Serial ports 2 is transferred to the first main screen monitor 11；
Described judgement earth fault branch road module 5, it is for judging the branch road of bus electric leakage, and will detect signal
It is transferred to the first main screen monitor 11 by serial ports 2.
Described voltage detection module 3 includes that one end of resistance R1～R4 and switch S1～S2, described switch S1 connects bus
Positive pole, the other end of described switch S1 passes through resistance R1, R3 ground connection, and one end of described switch S2 connects the negative pole of bus, institute
State the other end of switch S2 by resistance R2, R4 ground connection.
Described DC leakage module 4 includes that one end of resistance R5～R6 and switch S3, described resistance R5 is just connecting bus
Pole, one end of described resistance R6 connects the negative pole of bus, and the other end of described resistance R5 is connected with the other end of resistance R6, and with
One end of switch S3 connects, the other end ground connection of described switch S3.
Described DC leakage module 4 includes that one end of resistance R7～R12 and switch S4～S7, described resistance R7 connects bus
Positive pole, one end of described resistance R8 connects the negative pole of bus, and the other end of described resistance R7 is connected with the other end of resistance R8,
And be connected with one end of switch S4, the other end ground connection of described switch S4；
One end of described resistance R9 connects the positive pole of bus, and one end of described resistance R10 connects the negative pole of bus, described electricity
The other end of resistance R9 is connected with the other end of resistance R10, and is connected with one end of switch S5, another termination of described switch S5
Ground；
One end of described resistance R11 connects bus positive pole, and the other end is connected with one end of described switch S6, described switch S6
Other end ground connection；
One end of described resistance R12 connects bus negative pole, and the other end is connected with one end of described switch S7, described switch S7
Other end ground connection.
Described judgement earth fault branch road module 5 includes two DC leakage flow sensor and resistance R13～R14, two
One end of described DC leakage flow sensor connects bus both positive and negative polarity, the other end of two described DC leakage flow sensor respectively
Connect with described resistance R13 and resistance R14 respectively ground connection.
Detection uses direct current method, uses DC leakage flow sensor to be arranged in the outlet of direct current branch；From branch road anode
The electric current flowed out is through overload, return branch negative terminal；When branch road does not has ground connection, equal through the size of current of sensor, side
To on the contrary, cancel out each other in the magnetic field of generation, sensor not reflected load curent change；When this branch road passes through ground resistance earth
Time, the difference between current through sensor produces magnetic field, and the output of sensor changes, and reflects grounding leakage current.Main frame leads to
Whether cross and detect the output of each branch sensor is zero judgement earth fault branch road, and by measuring the positive and negative voltage of bus i.e.
Earth resistance can be calculated.
Described resistance R1～R4 is provided with remote measurement setting function.
Owing to the detection of busbar grounding resistance is completed by the main screen monitor on every section of bus, therefore, it can by timing
Or the method manually booting unbalanced bridge realizes the detection of bus two sides earth；Two sides earth detection design as branch road
Manually booting the function of synthetic method, the monitor of all networking operations all can enter manual mode；If communication host hands to be entered
Dynamic state, then be transmitted into off-line state order to all communication slaves connected, and communication slave receives entrance off-line shape
After state order, will be switched off all detection resistance switch in device, now in straight-flow system, be equivalent to an only communication host
Monitor, can manually boot synthetic method and carry out the two sides earth detection of branch road；If certain communication slave manual mode to be entered, then
Needing first to file an application to communication host, communication host is transmitted into off-line to other communication slaves connected after receiving application
Status command, communication host itself is also into off-line state simultaneously, is now equivalent to an only communication slave in straight-flow system
Monitor, can manually boot synthetic method and carry out the two sides earth detection of branch road.
Embodiment 2:
As shown in figs. 1 and 4, a kind of ground detection device, it is supervised online for the insulation situation of direct current power system
Survey, supervise including the first main screen monitor 11, multiple stage the second main screen monitor 12, multiple stage the first split screen monitor 21 and the second split screen
Survey instrument 22；
Second main screen monitor 12 described in multiple stage, multiple stage the first split screen monitor 21 and the second split screen monitor 22 are all and institute
State the first main screen monitor 11 by connection, described first main screen monitor 11 and multiple stage the second main screen monitor 12 points
Be not connected with the both positive and negative polarity of a plurality of bus, multiple stage the first split screen monitor 21 also corresponding respectively with the both positive and negative polarity of a plurality of bus even
Connecing, the described second selectable and a plurality of bus of split screen monitor 22 is positive and negative to be connected；And described first main screen monitor 11, multiple stage
Second main screen monitor 12, multiple stage the first split screen monitor 21 and the second equal ground connection of split screen monitor 22；
Described first main screen monitor 11, it detects for the voltage-to-ground that bus is positive and negative, DC leakage current detects and props up
The detection of road leakage current, and the second main screen monitor 12, multiple stage the first split screen described in its detection signal of aggregation process and multiple stage
Detection voltage-to-ground detection signal, DC leakage current detection signal and the branch road of monitor the 21, second split screen monitor 22 transmission
Leakage current detection signal；
Second main screen monitor 12 described in multiple stage, is used to the positive and negative voltage-to-ground detection of bus, DC leakage current detection
Detect with branch road leakage current, and by the detection letter of voltage-to-ground detection, DC leakage current detection and the detection of branch road leakage current
Number it is transferred to described first main screen monitor 11；
First split screen monitor 21 described in multiple stage and described second split screen monitor 22, be used to the positive and negative voltage-to-ground of bus
Detection and branch road leakage current detect, and are transferred to described by the detection signal of voltage-to-ground detection and the detection of branch road leakage current
First main screen monitor 11.
Described multiple stage the second main screen monitor 12, multiple stage the first split screen monitor 21 and the serial ports of the second split screen monitor 22
2 are sequentially connected with by circuit, and described circuit accesses in the serial ports 2 of described first main screen monitor 11.
Described first main screen monitor 11 and multiple stage the second main screen monitor 12 all include that voltage detection module 3, direct current leak
Electricity module 4 and judge earth fault branch road module 5, described voltage detection module 3, DC leakage module 4 and judge earth fault
Branch road module 5 is all connected with described bus both positive and negative polarity,
Described voltage detection module 3, it is for detecting bus voltage between positive and negative, the second main screen monitor 12
Voltage detection module 3 be transferred to the first main screen monitor 11 by serial ports 2；
Described DC leakage module 4, its DC leakage between positive and negative to bus detects, the second main screen monitor
The DC leakage module 4 of 12 is transferred to the first main screen monitor 11 by serial ports 2；
Described judgement earth fault branch road module 5, it is for judging the branch road of bus electric leakage, the second main screen monitoring
The judgement earth fault branch road module 5 of instrument 12 is transferred to the first main screen monitor 11 by serial ports 2.
Described first split screen monitor 21 and the second split screen monitor 22 all include voltage detection module 3 and judge ground connection event
Barrier branch road module 5, described voltage detection module 3 and judge that earth fault branch road module 5 is all connected with described bus both positive and negative polarity；
Described voltage detection module 3, it is for detecting bus voltage between positive and negative, and is passed through by detection signal
Serial ports 2 is transferred to the first main screen monitor 11；
Described judgement earth fault branch road module 5, it is for judging the branch road of bus electric leakage, and will detect signal
It is transferred to the first main screen monitor 11 by serial ports 2.
Described voltage detection module 3 includes that one end of resistance R1～R4 and switch S1～S2, described switch S1 connects bus
Positive pole, the other end of described switch S1 passes through resistance R1, R3 ground connection, and one end of described switch S2 connects the negative pole of bus, institute
State the other end of switch S2 by resistance R2, R4 ground connection.
Described DC leakage module 4 includes that one end of resistance R5～R6 and switch S3, described resistance R5 is just connecting bus
Pole, one end of described resistance R6 connects the negative pole of bus, and the other end of described resistance R5 is connected with the other end of resistance R6, and with
One end of switch S3 connects, the other end ground connection of described switch S3.
Described DC leakage module 4 includes that one end of resistance R7～R12 and switch S4～S7, described resistance R7 connects bus
Positive pole, one end of described resistance R8 connects the negative pole of bus, and the other end of described resistance R7 is connected with the other end of resistance R8,
And be connected with one end of switch S4, the other end ground connection of described switch S4；
One end of described resistance R9 connects the positive pole of bus, and one end of described resistance R10 connects the negative pole of bus, described electricity
The other end of resistance R9 is connected with the other end of resistance R10, and is connected with one end of switch S5, another termination of described switch S5
Ground；
One end of described resistance R11 connects bus positive pole, and the other end is connected with one end of described switch S6, described switch S6
Other end ground connection；
One end of described resistance R12 connects bus negative pole, and the other end is connected with one end of described switch S7, described switch S7
Other end ground connection.
Described judgement earth fault branch road module 5 includes two DC leakage flow sensor and resistance R13～R14, two
One end of described DC leakage flow sensor connects bus both positive and negative polarity, the other end of two described DC leakage flow sensor respectively
Connect with described resistance R13 and resistance R14 respectively ground connection.
Described resistance R1～R4 is provided with remote measurement setting function.
The How It Works of a kind of ground detection device, comprises the following steps:
Step S1. the second main screen monitor the 12, first split screen monitor 21 and the second split screen monitor 22 are all to bus
Voltage-to-ground detection, DC leakage current detection and the detection of branch road leakage current, and send inspection to the first main screen monitor 11 respectively
Survey signal；
Step S2. the first main screen monitor 11 is detected signal and second main screen monitor the 12, first split screen monitor
21 and second split screen monitor 22 transmission come detection signal carry out aggregation process；
The aggregation process of step S2 is detected signal by serial ports 1 and is transferred to outside by step S3. the first main screen monitor 11
Direct current cabinet monitoring unit.
Described step S1 comprises the following steps:
Step S11. the second main screen monitor the 12, first split screen monitor 21 and the voltage detecting of the second split screen monitor 22
Module 3 Guan Bi switch S1 and S2, detection bus or the positive and negative voltage-to-ground of branch line, and monitored to the first main screen by serial ports 2
Instrument 11 transmits voltage-to-ground detection signal；
The DC leakage module 4 of step S12. the second main screen monitor 12 regulates the offset voltage of bus, positive and negative to bus
Between DC leakage detect, and by serial ports 2 to the first main screen monitor 11 transmit DC leakage detection signal；
Step S13. judges that earth fault branch road module 5 flows through, by branch road, the magnetic that two DC leakage flow sensor produce
Field changing value, judges the branch road of electric leakage, and by serial ports 2, branch road leakage current detection signal is transferred to the first main screen
Monitor 11.
Monitor uses the method that balanced bridge and unbalanced bridge combine, by measuring positive and negative busbar voltage-to-ground,
Trying to achieve bus positive and negative insulation against ground resistance according to Ohm's law, wherein resistance R1, R2, R3, R4 is the positive and negative voltage-to-ground of bus
Detection resistance, is controlled whether to put into voltage monitoring resistance by switch S1, S2；Switch S4, S5 control two respectively to different resistances
Whether balancing resistance puts into；Switch S6, S7 control whether positive and negative unbalanced to ground resistance puts into respectively；When all switches are all located
When off-state, device is operated in off-line state, does not now the most put into any resistance inside device；For meeting multimachine connection
Network operation, completes the on-line monitoring to many split screens insulation resistance of DC system, and being arranged by simple parameter can be as master
Screen earthing monitor or split screen grounding detector, it is also possible to enter off-line state or presence by receiving communications command.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. a ground detection device, it carries out on-line monitoring for the insulation situation of direct current power system, it is characterised in that: bag
Include the first main screen monitor (11), multiple stage the second main screen monitor (12), multiple stage the first split screen monitor (21) and the second split screen
Monitor (22)；
Second main screen monitor (12), multiple stage the first split screen monitor (21) and the second split screen monitor (22) described in multiple stage all with
Described first main screen monitor (11) by connection, described first main screen monitor (11) and multiple stage the second main screen monitoring
Instrument (12) both positive and negative polarity with a plurality of bus respectively is connected, multiple stage the first split screen monitor (21) also corresponding respectively with a plurality of bus
Both positive and negative polarity connects, and the described second selectable and a plurality of bus of split screen monitor (22) is positive and negative to be connected；And described first main screen prison
Survey instrument (11), multiple stage the second main screen monitor (12), multiple stage the first split screen monitor (21) and the second split screen monitor (22) equal
Ground connection；
Described first main screen monitor (11), it detects for the voltage-to-ground that bus is positive and negative, DC leakage current detects and branch road
Leakage current detect, and aggregation process its detection signal and multiple stage described in the second main screen monitor (12), multiple stage the first split screen
Detection voltage-to-ground that monitor (21), the second split screen monitor (22) transmit detection signal, DC leakage current detection signal and
Branch road leakage current detection signal；
Second main screen monitor (12) described in multiple stage, be used to bus positive and negative voltage-to-ground detection, DC leakage current detection and
Branch road leakage current detects, and by voltage-to-ground detection, DC leakage current detection and the detection signal of branch road leakage current detection
It is transferred to described first main screen monitor (11)；
First split screen monitor (21) described in multiple stage and described second split screen monitor (22), be used to the positive and negative voltage-to-ground of bus
Detection and branch road leakage current detect, and are transferred to described by the detection signal of voltage-to-ground detection and the detection of branch road leakage current
First main screen monitor (11).
A kind of ground detection device, it is characterised in that: described multiple stage the second main screen monitor
(12), the serial ports 2 of multiple stage the first split screen monitor (21) and the second split screen monitor (22) be sequentially connected with by circuit, described line
Road is accessed in the serial ports 2 of described first main screen monitor (11).
A kind of ground detection device, it is characterised in that: described first main screen monitor (11) and many
Platform the second main screen monitor (12) all includes voltage detection module (3), DC leakage module (4) and judges earth fault branch road mould
Block (5), described voltage detection module (3), DC leakage module (4) and judge earth fault branch road module (5) all with described mother
Line both positive and negative polarity connects；
Described voltage detection module (3), it is for detecting bus voltage between positive and negative, the second main screen monitor (12)
Voltage detection module (3) be transferred to the first main screen monitor (11) by serial ports 2；
Described DC leakage module (4), its DC leakage between positive and negative to bus detects, the second main screen monitor
(12) DC leakage module (4) is transferred to the first main screen monitor (11) by serial ports 2；
Described judgement earth fault branch road module (5), it is for judging the branch road of bus electric leakage, the second main screen monitor
(12) judgement earth fault branch road module (5) is transferred to the first main screen monitor (11) by serial ports 2.
A kind of ground detection device, it is characterised in that: described first split screen monitor (21) and the
2 panes monitor (22) all includes voltage detection module (3) and judges earth fault branch road module (5), described voltage detecting mould
Block (3) and judge that earth fault branch road module (5) is all connected with described bus both positive and negative polarity；
Described voltage detection module (3), it is for detecting bus voltage between positive and negative, and will detection signal by string
Mouth 2 is transferred to the first main screen monitor (11)；
Described judgement earth fault branch road module (5), it is for judging the branch road of bus electric leakage, and is led to by detection signal
Cross serial ports 2 and be transferred to the first main screen monitor (11).
5. according to ground detection device a kind of described in claim 3 or 4, it is characterised in that: described voltage detection module (3) includes
One end of resistance R1～R4 and switch S1～S2, described switch S1 connects the positive pole of bus, and the other end of described switch S1 passes through
Resistance R1, R3 ground connection, one end of described switch S2 connects the negative pole of bus, and the other end of described switch S2 passes through resistance R2, R4
Ground connection；Described resistance R1～R4 is provided with remote measurement setting function.
A kind of ground detection device, it is characterised in that: described DC leakage module (4) includes electricity
One end of resistance R5～R6 and switch S3, described resistance R5 connects the positive pole of bus, and one end of described resistance R6 connects the negative of bus
Pole, the other end of described resistance R5 is connected with the other end of resistance R6, and is connected with one end of switch S3, and described switch S3's is another
One end ground connection.
A kind of ground detection device, it is characterised in that: described DC leakage module (4) includes electricity
One end of resistance R7～R12 and switch S4～S7, described resistance R7 connects the positive pole of bus, and one end of described resistance R8 connects bus
Negative pole, the other end of described resistance R7 is connected with the other end of resistance R8, and with switch S4 one end be connected, described switch S4
Other end ground connection；
One end of described resistance R9 connects the positive pole of bus, and one end of described resistance R10 connects the negative pole of bus, described resistance R9
The other end be connected with the other end of resistance R10, and with switch S5 one end be connected, the other end ground connection of described switch S5；
One end of described resistance R11 connects bus positive pole, and the other end is connected with one end of described switch S6, described switch S6 another
End ground connection；
One end of described resistance R12 connects bus negative pole, and the other end is connected with one end of described switch S7, described switch S7 another
End ground connection.
8. according to ground detection device a kind of described in claim 3 or 4, it is characterised in that: described judgement earth fault branch road mould
Block (5) includes that two DC leakage flow sensor and resistance R13～R14, one end of two described DC leakage flow sensor divide
Not Lian Jie bus both positive and negative polarity, the other end of two described DC leakage flow sensor is gone here and there with described resistance R13 and resistance R14 respectively
Couple ground.
9. the How It Works of a ground detection device, it is characterised in that: comprise the following steps:
Step S1. the second main screen monitor (12), the first split screen monitor (21) and the second split screen monitor (22) are all to bus
Voltage-to-ground detection, DC leakage current detection and branch road leakage current detection, and respectively to the first main screen monitor (11) send out
Signal is surveyed in censorship；
Step S2. the first main screen monitor (11) is detected signal and the second main screen monitor (12), the first split screen monitor
(21) the detection signal that and the second split screen monitor (22) transmission comes carries out aggregation process；
The aggregation process of step S2 is detected signal by serial ports 1 and is transferred to outside straight by step S3. the first main screen monitor (11)
Stream screen monitoring unit.
A kind of How It Works of ground detection device, it is characterised in that: described step S1 includes
Following steps:
The voltage inspection of step S11. the second main screen monitor (12), the first split screen monitor (21) and the second split screen monitor (22)
Survey module (3) Guan Bi switch S1 and S2, detection bus or the positive and negative voltage-to-ground of branch line, and pass through serial ports 2 to the first main screen
Monitor (11) transmission voltage-to-ground detection signal；
The offset voltage of DC leakage module (4) the regulation bus of step S12. the second main screen monitor (12), positive and negative to bus
Between DC leakage detect, and by serial ports 2 to first main screen monitor (11) transmission DC leakage detection signal；
Step S13. judges that earth fault branch road module (5) flows through, by branch road, the magnetic field that two DC leakage flow sensor produce
Changing value, judges the branch road of electric leakage, and by serial ports 2, branch road leakage current detection signal is transferred to the first main screen prison
Survey instrument (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610556075.7A CN106199311A (en) | 2016-07-14 | 2016-07-14 | A kind of ground detection device and How It Works |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610556075.7A CN106199311A (en) | 2016-07-14 | 2016-07-14 | A kind of ground detection device and How It Works |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106199311A true CN106199311A (en) | 2016-12-07 |
Family
ID=57475308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610556075.7A Withdrawn CN106199311A (en) | 2016-07-14 | 2016-07-14 | A kind of ground detection device and How It Works |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106199311A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107307A (en) * | 2018-01-22 | 2018-06-01 | 杭州春来科技有限公司 | Serial line interface harness failure detector and method |
| CN108318787A (en) * | 2017-12-28 | 2018-07-24 | 山东鲁能智能技术有限公司 | A kind of DC bus multistage paired running switching method and system |
| CN109782106A (en) * | 2019-01-07 | 2019-05-21 | 邯郸钢铁集团有限责任公司 | A kind of DC system earth fault lookup device and method |
| CN110736936A (en) * | 2019-10-31 | 2020-01-31 | 深圳供电局有限公司 | Direct current system ground fault detection device and control method thereof |
| CN112003275A (en) * | 2020-08-17 | 2020-11-27 | 深圳弘德智能有限公司 | Safe power supply system and method |
| CN113156185A (en) * | 2021-03-30 | 2021-07-23 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC bus voltage monitoring system |
| CN113311298A (en) * | 2021-05-26 | 2021-08-27 | 石家庄通合电子科技股份有限公司 | Method for detecting insulation of split-screen branch circuit input by multi-segment bus |
-
2016
- 2016-07-14 CN CN201610556075.7A patent/CN106199311A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318787A (en) * | 2017-12-28 | 2018-07-24 | 山东鲁能智能技术有限公司 | A kind of DC bus multistage paired running switching method and system |
| CN108318787B (en) * | 2017-12-28 | 2020-04-28 | 国网智能科技股份有限公司 | Direct-current bus multi-section parallel operation switching method and system |
| CN108107307A (en) * | 2018-01-22 | 2018-06-01 | 杭州春来科技有限公司 | Serial line interface harness failure detector and method |
| CN109782106A (en) * | 2019-01-07 | 2019-05-21 | 邯郸钢铁集团有限责任公司 | A kind of DC system earth fault lookup device and method |
| CN109782106B (en) * | 2019-01-07 | 2021-03-09 | 邯郸钢铁集团有限责任公司 | Direct current system ground fault searching device and method |
| CN110736936A (en) * | 2019-10-31 | 2020-01-31 | 深圳供电局有限公司 | Direct current system ground fault detection device and control method thereof |
| CN110736936B (en) * | 2019-10-31 | 2022-04-19 | 深圳供电局有限公司 | Direct current system ground fault detection device and control method thereof |
| CN112003275A (en) * | 2020-08-17 | 2020-11-27 | 深圳弘德智能有限公司 | Safe power supply system and method |
| CN113156185A (en) * | 2021-03-30 | 2021-07-23 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC bus voltage monitoring system |
| CN113311298A (en) * | 2021-05-26 | 2021-08-27 | 石家庄通合电子科技股份有限公司 | Method for detecting insulation of split-screen branch circuit input by multi-segment bus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106199311A (en) | A kind of ground detection device and How It Works | |
| CN102707113B (en) | For detection of usurping and system, the method and apparatus of state of electrical power | |
| CN104237645B (en) | A kind of transformer station direct current system state of insulation on-line monitoring system and method | |
| CN103698651B (en) | A kind ofly supervise method and the device that D.C. isolation bus is altered mutually | |
| CN106841956A (en) | A kind of anti-instantaneous ac scurries into insulation monitoring and warning device | |
| CN104820156B (en) | A kind of Beam Detector and method | |
| CN106353646B (en) | A kind of Insulation monitoring control method based on high voltage direct current power supply system | |
| CN103983856B (en) | A kind of Low Voltage Differential Signal Interface Matching resistance automatic checkout equipment and method | |
| CN104422897B (en) | Detection method and device that in two dc power supply system, direct current is mutually altered | |
| CN105099506A (en) | Electric energy meter RS485 communication failure detecting and self-healing device and method | |
| CN103278739A (en) | High voltage dc (direct current) transmission control system Profibus field bus fault diagnosis method | |
| CN106532934A (en) | Alternating current row cabinet intelligent monitoring system | |
| CN107037277A (en) | Detection device and method for multiple powered devices of Ethernet power supply system | |
| CN107369327A (en) | Intersection traffic whistle control system and method based on the buses of RS 485 | |
| CN207165012U (en) | Intersection traffic whistle control system based on the buses of RS 485 | |
| CN105244853B (en) | A kind of transforming plant DC power-supply system for possessing ground connection inspection route selection Checking Mechanism | |
| CN204086448U (en) | A kind of insulation monitoring and warning device | |
| CN205786950U (en) | A kind of ground detection device | |
| CN110221229A (en) | Power-supply management system, power supply system and method for controlling power supply | |
| CN109143114A (en) | A kind of direct current mutually alters fault detection means and method | |
| CN202502139U (en) | High-voltage charged display device | |
| CN105425780B (en) | A kind of bus failure self-diagnosis system | |
| CN109801482A (en) | Internet of Things ground monitor based on ZigBee technology | |
| CN204966989U (en) | Take switch board safety monitoring device of temperature detection | |
| CN207966132U (en) | A kind of building block system residual current type detector for electric fire protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161207 |
|
| WW01 | Invention patent application withdrawn after publication |