CN106646127A - Distributed power grid zero sequence fault monitoring system - Google Patents
Distributed power grid zero sequence fault monitoring system Download PDFInfo
- Publication number
- CN106646127A CN106646127A CN201611134050.4A CN201611134050A CN106646127A CN 106646127 A CN106646127 A CN 106646127A CN 201611134050 A CN201611134050 A CN 201611134050A CN 106646127 A CN106646127 A CN 106646127A
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- China
- Prior art keywords
- monitoring system
- resistance
- power grid
- sequence fault
- circuit
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Classifications
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a distributed power grid zero sequence fault monitoring system, which comprises a distributed power grid zero sequence fault monitoring system connected onto the power grid. The fault monitoring system particularly comprises a zero sequence fault diagnosis and recording device and a background monitoring system connected through Ethernet, wherein a monitoring module for acquiring power parameters is arranged in the zero sequence fault diagnosis and recording device. The operation state of each substation power grid is monitored in an online and remote mode through the monitoring module, the workload in manpower survey can be reduced, the background monitoring system can record and store the acquired operation state, later search and analysis are facilitated, extremely accurate and effective data are provided for maintenance and safety evaluation of the distribution network, a treatment scheme is given, and the power utilization reliability is improved.
Description
Technical field
The invention belongs to field of electrical equipment, more particularly to distributed power grid zero-sequence fault monitoring system.
Background technology
With expanding economy, the power supply reliability, security to power industry proposes higher and higher requirement how
The fault rate of electrical network is reduced, improve power supply reliability has become an emphasis of electrical network research.
In China, medium voltage distribution network region span is very big, and electric pressure is also different, and because medium voltage distribution network is
Towards numerous power consumers, for more preferable maintenance management power distribution network, it is necessary to which operation of power networks situation everywhere is collected
The monitoring management of middleization.
Present situation is the mode or traditional approach " regular visit " that the existing power network monitoring of most domestic is safeguarded：At each
Transformer station is equipped with corresponding testing equipment and operation maintenance personnel, by operation maintenance personnel in each transformer station's monitoring station distribution network operation
Situation, when failure occurs, timely checking device, and corresponding treatment measures are reported to upper level and made on request.
The drawbacks of traditional approach is：At the scene the record of data is general by the way of manual record, data accuracy
It is not high.
The content of the invention
In order to solve shortcoming and defect present in prior art, the invention provides for improving record data accuracy
Distributed power grid zero-sequence fault monitoring system.
In order to reach above-mentioned technical purpose, the invention provides distributed power grid zero-sequence fault monitoring system, malfunction monitoring
System is connected on electrical network, the fault monitoring system, including：Zero-sequence fault is diagnosed and wave recording device, and and zero-sequence fault
The background monitoring system that diagnosis and wave recording device are connected by Ethernet；
In zero-sequence fault diagnosis and wave recording device, monitor component is provided with, monitor component is included for obtaining circuit ginseng
Several signal acquisition circuit and the resolve of wave shape machine being connected with signal acquisition circuit, resolve of wave shape machine and signal
Communicated based on bus between Acquisition Circuit；
In monitor component, the first warning device being connected with resolve of wave shape machine is additionally provided with.
Optionally, it is provided with platform monitoring system in the rear
For the server for being stored parameters of electric power, and the second warning device being connected with server.
Optionally, the circuit parameter includes：
The phase voltage in each female end in the electrical network between transformer station, the residual voltage, institute in the electrical network on circuit
State the zero-sequence current in circuit branch in electrical network.
Optionally, in zero-sequence fault diagnosis and wave recording device, it is additionally provided with the control being connected with the monitor component
Circuit.
Optionally, in the fault monitoring system：
The control circuit controls the phase voltage that the monitor component obtains at least two grades；
The control circuit controls the run signal that the monitor component obtains circuit at least six female ends.
Optionally, the signal acquisition circuit, including：
Resistance R1, resistance R2, resistance R3, resistance R4, in-phase proportion computing circuit A1, difference scaling circuit A2, two
Pole pipe D1, diode D2；
Resistance R1, resistance R2, resistance R3, resistance R4 are sequentially connected in series, and constitute series circuit, and one end of series circuit is grounded,
The other end is connected with the output end of A2；The first input end of A1 is connected between resistance R1 and resistance R2, and first in A1 exports
Diode D1 is parallel between end and the output end of A1, between the output end and resistance R3 of A1 diode D2 is connected with, A2's
First input end is connected between resistance R3 and resistance R4, and second input of A2 is connected with second input of A1.
Optionally, the resolve of wave shape machine includes oscillograph, and the computer being connected with oscillograph.
Optionally, first warning device, including：Alarm bell and/or installation warning expansion board in a computer.
Optionally, second warning device, including：Alarm bell and/or installation warning expansion board in a computer.
Optionally, the warning expansion board is used to generate alarm sound and/or generation alarm window.
The beneficial effect brought of technical scheme that the present invention is provided is：
Implement the running status for remotely monitoring each transformer station's electrical network online by monitor component, can reduce and be surveyed in manpower
The workload examined, while background monitoring system can carry out record storage to the running status for getting, so that the later stage is carried out
Analysis is searched, the maintenance and Security Testing for power distribution network provides very accurately and effectively data, is easy to proposition resolution,
Improve electricity consumption reliability.
Description of the drawings
In order to be illustrated more clearly that technical scheme, embodiment will be described below needed for the accompanying drawing to be used
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the structural representation of the distributed power grid zero-sequence fault monitoring system that the present invention is provided；
Fig. 2 is the circuit diagram of the signal acquisition circuit that the present invention is provided.
Specific embodiment
To make the structure and advantage of the present invention clearer, the structure of the present invention is made further below in conjunction with accompanying drawing
Description.
Embodiment one
The invention provides distributed power grid zero-sequence fault monitoring system, fault monitoring system is connected on electrical network, described
Fault monitoring system, including：Zero-sequence fault is diagnosed and wave recording device, and passes through ether with zero-sequence fault diagnosis and wave recording device
The background monitoring system of net connection；
In zero-sequence fault diagnosis and wave recording device, monitor component is provided with, monitor component is included for obtaining circuit ginseng
Several signal acquisition circuit and the resolve of wave shape machine being connected with signal acquisition circuit, resolve of wave shape machine and signal
Communicated based on bus between Acquisition Circuit；
In monitor component, the first warning device being connected with resolve of wave shape machine is additionally provided with.
In force, as shown in figure 1, distributed power grid zero-sequence fault monitoring system includes that zero-sequence fault diagnoses and record ripple dress
Put, and the background monitoring system being attached thereto, the two is connected by Ethernet, for keep data it is instant up under
Reach.
For the function of making zero-sequence fault diagnose and wave recording device is realized fault diagnosis and waveform recording, analyzed, at it
In be provided with monitor component, and the control circuit being connected with monitor component.Control circuit control monitor component obtains at least two
The phase voltage of grade；Control circuit control monitor component obtains the run signal of circuit at least six female ends.
Monitor component specifically includes signal acquisition circuit and resolve of wave shape machine, and the two is connected based on bus, here
Why from CAN communication modes and Ethernet transmission means, it is because in the situation for having network interface communication, signal to cover
Under, it is free from the influence of the external environment, use manpower and material resources sparingly outer, it is most important that there is provided reliable, the efficient information transmission technology
Platform is easy to the flexible networking of monitoring system to monitoring system.
The first warning device is additionally provided with monitor component, first warning device includes：Alarm bell and/or installed in calculating
Warning expansion board in machine.First warning device is connected with the resolve of wave shape machine in monitor component, works as resolve of wave shape
When the result of machine shows that the parameters of electric power for currently collecting exceedes threshold value, reported to the police by the first warning device.First reports to the police
Alarm bell in equipment is used to send chimes of doom, and warning expansion board directly receives the result of resolve of wave shape machine, according to result
Alarm sound is generated, or is generated alarm window and is exported to the display of resolve of wave shape machine.
In order to realize the function of waveform analysis, resolve of wave shape machine here includes oscillograph, and connects with oscillograph
The computer for connecing.
Optionally, in the rear the server for parameters of electric power to be stored, Yi Jiyu are provided with platform monitoring system
Second warning device of server connection.
In force, the second warning device is connected on the server in background monitoring system, when the result table of server
When the bright parameters of electric power for currently collecting exceedes threshold value, reported to the police by the second warning device.Police in second warning device
Bell is used to send chimes of doom, and warning expansion board directly receives the result of server, and according to result alarm sound is generated, or
Generate alarm window and export to the display of server.
Optionally, the circuit parameter includes：
The phase voltage in each female end in the electrical network between transformer station, the residual voltage, institute in the electrical network on circuit
State the zero-sequence current in circuit branch in electrical network.
In force, monitor component is used to obtain the circuit parameter of the circuit on fault monitoring system connection electrical network, here
Circuit parameter specifically include phase voltage in each female end in electrical network between transformer station, residual voltage in electrical network on circuit,
Zero-sequence current in electrical network in circuit branch.
Optionally, the signal acquisition circuit, including：
Resistance R1, resistance R2, resistance R3, resistance R4, in-phase proportion computing circuit A1, difference scaling circuit A2, two
Pole pipe D1, diode D2；
Resistance R1, resistance R2, resistance R3, resistance R4 are sequentially connected in series, and constitute series circuit, and one end of series circuit is grounded,
The other end is connected with the output end of A2；The first input end of A1 is connected between resistance R1 and resistance R2, and first in A1 exports
Diode D1 is parallel between end and the output end of A1, between the output end and resistance R3 of A1 diode D2 is connected with, A2's
First input end is connected between resistance R3 and resistance R4, and second input of A2 is connected with second input of A1.
In force, signal acquisition circuit concrete structure as shown in Fig. 2 the signal acquisition circuit input be Ui,
Second input of A1 and second input of A2 are respectively connecting to, the output end of signal acquisition circuit is Uo, defeated with A2
Go out end to be connected.Signal acquisition circuit employing is input into the characteristic of high impedance, and the resistance requirement of each resistance is：R1=R2, R4
=2R3.
Work as Ui>When 0, D1 cut-offs, D2 conductings, A1 is scaling circuit in the same direction, and gain is 1+R2/R1, and A2 is differential ratio
Example computing circuit, Uo=-Ui；Work as Ui<When 0, D1 conductings, D2 cut-offs, A1 is voltage follower, and A1 is emitter follower, and A2 void is short,
Without pressure drop on R2, R3 branch road, therefore no current, so R4 no currents, without pressure drop on circuit so that Uo=Ui.
The signal that signal source sends is directly coupled to A1, the positive input of A2, because electric current is zero, input impedance is equal to defeated
Enter voltage ratio input current, so input impedance is almost infinity, seldom, holding wire is upper for electric current needed for high input impedance type
Dynamic electric current is also smaller, so the requirement to holding wire is not very high, and can reduce the interference that current strap is come.
The invention provides distributed power grid zero-sequence fault monitoring system, including the distributed power grid zero being connected on electrical network
Sequence fault monitoring system, the fault monitoring system specifically include by Ethernet connect zero-sequence fault diagnosis and wave recording device with
Background monitoring system.The monitor component for obtaining parameters of electric power is provided with zero-sequence fault diagnosis and wave recording device.By monitoring
Component implements the running status for remotely monitoring each transformer station's electrical network online, can reduce the workload in manpower prospecting, together
When background monitoring system can carry out record storage to the running status for getting, be distribution so that the later stage makes a look up analysis
The maintenance of net and Security Testing provide very accurately and effectively data, are easy to propose resolution, improve electricity consumption reliability.
Each sequence number in above-described embodiment is for illustration only, does not represent the elder generation during the assembling or use of each part
Afterwards sequentially.
Embodiments of the invention are the foregoing is only, it is all in the spirit and principles in the present invention not to limit the present invention
Within, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. distributed power grid zero-sequence fault monitoring system, fault monitoring system is connected on electrical network, it is characterised in that the failure
Monitoring system, including：Zero-sequence fault is diagnosed and wave recording device, and is connected by Ethernet with zero-sequence fault diagnosis and wave recording device
The background monitoring system for connecing；
In zero-sequence fault diagnosis and wave recording device, monitor component is provided with, monitor component is included for obtaining circuit parameter
Signal acquisition circuit and the resolve of wave shape machine being connected with signal acquisition circuit, resolve of wave shape machine and signals collecting
Communicated based on bus between circuit；
In monitor component, the first warning device being connected with resolve of wave shape machine is additionally provided with.
2. distributed power grid zero-sequence fault monitoring system according to claim 1, it is characterised in that platform monitoring in the rear
In system, it is provided with
For the server for being stored parameters of electric power, and the second warning device being connected with server.
3. distributed power grid zero-sequence fault monitoring system according to claim 1, it is characterised in that the circuit parameter bag
Include：
The phase voltage in each female end in the electrical network between transformer station, the residual voltage, the electricity in the electrical network on circuit
Zero-sequence current in net in circuit branch.
4. distributed power grid zero-sequence fault monitoring system according to claim 3, it is characterised in that in the zero-sequence fault
In diagnosis and wave recording device, the control circuit being connected with the monitor component is additionally provided with.
5. distributed power grid zero-sequence fault monitoring system according to claim 4, it is characterised in that in the malfunction monitoring
In system：
The control circuit controls the phase voltage that the monitor component obtains at least two grades；
The control circuit controls the run signal that the monitor component obtains circuit at least six female ends.
6. distributed power grid zero-sequence fault monitoring system according to claim 1, it is characterised in that the signals collecting electricity
Road, including：
Resistance R1, resistance R2, resistance R3, resistance R4, in-phase proportion computing circuit A1, difference scaling circuit A2, diode
D1, diode D2；
Resistance R1, resistance R2, resistance R3, resistance R4 are sequentially connected in series, and constitute series circuit, and one end ground connection of series circuit is another
End is connected with the output end of A2；The first input end of A1 is connected between resistance R1 and resistance R2, A1 the first output end with
Diode D1 is parallel between the output end of A1, diode D2 is connected between the output end and resistance R3 of A1, the first of A2
Input is connected between resistance R3 and resistance R4, and second input of A2 is connected with second input of A1.
7. distributed power grid zero-sequence fault monitoring system according to claim 1, it is characterised in that the waveform analysis meter
Calculation machine includes oscillograph, and the computer being connected with oscillograph.
8. distributed power grid zero-sequence fault monitoring system according to claim 1, it is characterised in that described first reports to the police sets
It is standby, including：Alarm bell and/or installation warning expansion board in a computer.
9. distributed power grid zero-sequence fault monitoring system according to claim 2, it is characterised in that described second reports to the police sets
It is standby, including：Alarm bell and/or installation warning expansion board in a computer.
10. distributed power grid zero-sequence fault monitoring system according to claim 8 or claim 9, it is characterised in that the warning is expanded
Panel is used to generate alarm sound and/or generation alarm window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611134050.4A CN106646127A (en) | 2016-12-10 | 2016-12-10 | Distributed power grid zero sequence fault monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611134050.4A CN106646127A (en) | 2016-12-10 | 2016-12-10 | Distributed power grid zero sequence fault monitoring system |
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| CN106646127A true CN106646127A (en) | 2017-05-10 |
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ID=58825165
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| CN201611134050.4A Pending CN106646127A (en) | 2016-12-10 | 2016-12-10 | Distributed power grid zero sequence fault monitoring system |
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Cited By (2)
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| CN108089099A (en) * | 2017-12-18 | 2018-05-29 | 广东电网有限责任公司佛山供电局 | The diagnostic method of distribution network failure based on depth confidence network |
| CN111341085A (en) * | 2017-08-09 | 2020-06-26 | 绿铜能源科技有限公司 | System and method for providing waveforms from a power monitor through a wireless system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111341085A (en) * | 2017-08-09 | 2020-06-26 | 绿铜能源科技有限公司 | System and method for providing waveforms from a power monitor through a wireless system |
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Application publication date: 20170510 |