CN205450179U - Failure monitoring system based on distribution network monitored control system - Google Patents
Failure monitoring system based on distribution network monitored control system Download PDFInfo
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- CN205450179U CN205450179U CN201620284435.8U CN201620284435U CN205450179U CN 205450179 U CN205450179 U CN 205450179U CN 201620284435 U CN201620284435 U CN 201620284435U CN 205450179 U CN205450179 U CN 205450179U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 41
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 abstract description 8
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
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- 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
Abstract
The utility model provides a failure monitoring system based on distribution network monitored control system, relates to distribution network on -line monitoring and failure diagnosis field, for the difficult problem of being discover of the phase to earth fault who solves small current neutral grounding sys tem. GPS time service module trigger current collection module, electric current collection module gather the three phase current signal, and electric current collection module connects CPU control module one, CPU control module no. 1 and connects communication module no. 1, the zero -sequence voltage of main website is gathered to zero sequence voltage acquisition module, and two connection communication module two, communication module no. 1 of CPU control module two, CPU control module are connected to zero sequence voltage acquisition module and communication module communicates between two, the utility model discloses can find out fault occurrence point's position, improve the distribution network and monitored control system reliability of operation behind the sudden failure has appeared. The utility model is suitable for a control distribution network.
Description
Technical field
This utility model relates to power distribution network on-line monitoring and fault diagnosis field, is specifically related to failure monitoring technology based on residual voltage monitoring.
Background technology
Power distribution network is in large scale, and branch is numerous, and during on-line monitoring, data acquisition amount is big, its probability broken down power transmission network to be significantly larger than；Additionally, power distribution network is directly connected with load side, distribution is the most properly functioning be directly connected to load side can normal electricity consumption, therefore, after power distribution network breaks down, being uploaded by fault message the most accurately and timely, provides infallible data with reference to being to ensure that power distribution network safe and stable operation for dispatcher, improves power distribution network power supply capacity and the major issue of power supply reliability.
Small current neutral grounding system is also called neutral point non-direct grounding system, including three kinds of earthing types: isolated neutral, neutral by arc extinction coil grounding and neutral point are through high resistance ground.Electrical network this system of many employings of China below 110kV.Its advantage is, it is formed without short-circuit loop when system generation singlephase earth fault, simply via line direct-to-ground capacitance forms loop, the electric current of earth point is the least, three-phase line voltage remains in that symmetrical relations, does not affect power supply continuous to load, therefore need not trip immediately, code regulation can continue to run with 1～2h, thus improves system reliability of operation.But during small current neutral grounding system generation singlephase earth fault, other two phase-to-ground voltage raises, it is possible to be expanded into or multipoint earthing even phase fault further at 2.So, once there occurs singlephase earth fault, it would be desirable to find trouble point as early as possible so that operations staff fixes a breakdown in time.
Utility model content
This utility model is to solve the problem that the singlephase earth fault of small current neutral grounding system is difficult to be found, thus provides a kind of failure monitoring system based on monitoring system for power distribution networks.
A kind of failure monitoring system based on monitoring system for power distribution networks described in the utility model, including main station system and branch terminal；
Branch terminal, including GPS time service module, current acquisition module, CPU control module one and communication module one；
The signal output part that triggers of GPS time service module connects the triggering signal input part of current acquisition module, current acquisition module gathers three-phase current signal, the current signal output end of current acquisition module connects the current signal input of CPU control module one, the current signal output end of CPU control module one connects the current signal input of communication module one, the fault generation signal output part of communication module one connects the fault generation signal input part of CPU control module one, the fault generation signal output part of CPU control module one connects the control current signal of current acquisition module and uploads end；
Main station system, including residual voltage acquisition module, CPU control module two and communication module two；
Residual voltage acquisition module gathers the residual voltage of main website, the outfan of residual voltage acquisition module connects the residual voltage signal input part of CPU control module two, the fault generation signal output part of CPU control module two connects the fault generation signal input part of communication module two, and the current signal output end of communication module two connects the current signal input of CPU control module two；
Communicate between communication module one and communication module two.
A kind of failure monitoring system based on monitoring system for power distribution networks of the present utility model, based on existing monitoring system for power distribution networks, increasing main station system and branch terminal in existing monitoring system for power distribution networks further, the communication system operational mode of monitoring system is divided into normal transmission mode and emergency transmissions pattern.By judging whether single-phase earthing of small current earthing system breaks down at main website side monitoring residual voltage, under normal condition, system zero sequence voltage is 0, when there is singlephase earth fault, system zero sequence voltage is increased to phase voltage, main station system is in this, as triggering signal, communication system stops normal transmission mode, opens emergency transmissions pattern, it is ensured that in the fastest mode, fault generation signal is sent to branch terminal.Emergency transmissions pattern refers to that, when system jam, communication system terminates all routine data transfer at once, it is ensured that fault generation signal is sent to branch terminal in the fastest mode, and after branch current signal passes main website back, communication system recovers normal transmission mode.
Current acquisition module is by GPS (GlobalPositioningSystem, global positioning system) time service module output 1PPS standard time signal start, circuit three-phase current signal is acquired, amplitude and phase angle need to be gathered simultaneously, under normal transmission mode, current signal is not uploaded to CPU control module one, after receiving the fault generation signal that main station system sends by markers by fault before all current acquisition signals in the later time period pack on pass main station system back, upload communication system after successfully and recover normal transmission mode.
The current signal received is obtained zero-sequence current by phasor synthesis by the communication module two of main station system, owing to circuit exists out-of-balance current, so circuit zero-sequence current is likely to not be 0 under normal operating condition, therefore time points many before and after fault are carried out zero-sequence current synthesis, obtain the variable quantity of zero-sequence current, by comparing the variable quantity of zero-sequence current, the impact brought by out-of-balance current can be eliminated, thus accurately find out fault and some place circuit occurs.
A kind of failure monitoring system based on monitoring system for power distribution networks described in the utility model is by the relative analysis of each branch road zero-sequence current change before and after line fault, find out fault and the position of point occurs, coordinate the communication method of operation of improvement again, guarantee that fault message can be uploaded in time, improve power distribution network and the reliability of supervisory control system running after catastrophic failure occurs.
This utility model is applicable to monitor power distribution network.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of based on monitoring system for power distribution networks the failure monitoring system described in detailed description of the invention one；
Fig. 2 is the structural representation in power distribution network of the residual voltage acquisition module in detailed description of the invention one；Branch into the branch road in power distribution network.
Detailed description of the invention
Detailed description of the invention one: see figures.1.and.2 and illustrate present embodiment, a kind of based on monitoring system for power distribution networks the failure monitoring system described in present embodiment, including main station system and branch terminal；
Branch terminal, including GPS time service module 1, current acquisition module 2, CPU control module 1 and communication module 1；
The signal output part that triggers of GPS time service module 1 connects the triggering signal input part of current acquisition module 2, current acquisition module 2 gathers three-phase current signal, the current signal output end of current acquisition module 2 connects the current signal input of CPU control module 1, the current signal output end of CPU control module 1 connects the current signal input of communication module 1, the fault generation signal output part of communication module 1 connects the fault generation signal input part of CPU control module 1, the fault generation signal output part of CPU control module 1 connects the control current signal of current acquisition module 2 and uploads end；
Main station system, including residual voltage acquisition module 5, CPU control module 26 and communication module 27；
Residual voltage acquisition module 5 gathers the residual voltage of main website, the outfan of residual voltage acquisition module 5 connects the residual voltage signal input part of CPU control module 26, the fault generation signal output part of CPU control module 26 connects the fault generation signal input part of communication module 27, and the current signal output end of communication module 27 connects the current signal input of CPU control module 26；
Communicate between communication module 1 and communication module 27.
Detailed description of the invention two: present embodiment is to be described further a kind of based on monitoring system for power distribution networks the failure monitoring system described in detailed description of the invention one, in present embodiment, three-phase current signal is acquired for interval by GPS time service module 1 trigger current acquisition module 2 with 1s.
Detailed description of the invention three: present embodiment is to be described further a kind of based on monitoring system for power distribution networks the failure monitoring system described in detailed description of the invention one, in present embodiment, GPRS, Zigbee, Adhoc or optical fiber between communication module 1 and communication module 27, is used to communicate.
Present embodiment can use GPRS, Zigbee or Adhoc communication, it would however also be possible to employ traditional fiber means of communication.
The above; it is only this utility model preferably specific embodiment; but protection domain of the present utility model is not limited to this; any those familiar with the art is in technical scope disclosed in this utility model; the change that can readily occur in or replacement; all should contain within protection domain of the present utility model, therefore, protection domain of the present utility model should be as the criterion with scope of the claims.
Claims (3)
1. a failure monitoring system based on monitoring system for power distribution networks, it is characterised in that include main station system and branch terminal；
Branch terminal, including GPS time service module (1), current acquisition module (2), CPU control module one (3) and communication module one (4)；
The triggering signal output part of GPS time service module (1) connects the triggering signal input part of current acquisition module (2), current acquisition module (2) gathers three-phase current signal, the current signal output end of current acquisition module (2) connects the current signal input of CPU control module one (3), the current signal output end of CPU control module one (3) connects the current signal input of communication module one (4), the fault generation signal output part of communication module one (4) connects the fault generation signal input part of CPU control module one (3), the fault generation signal output part of CPU control module one (3) connects the control current signal of current acquisition module (2) and uploads end；
Main station system, including residual voltage acquisition module (5), CPU control module two (6) and communication module two (7)；
Residual voltage acquisition module (5) gathers the residual voltage of main website, the outfan of residual voltage acquisition module (5) connects the residual voltage signal input part of CPU control module two (6), the fault generation signal output part of CPU control module two (6) connects the fault generation signal input part of communication module two (7), and the current signal output end of communication module two (7) connects the current signal input of CPU control module two (6)；
Communicate between communication module one (4) and communication module two (7).
A kind of failure monitoring system based on monitoring system for power distribution networks the most according to claim 1, it is characterised in that three-phase current signal is acquired for interval by GPS time service module (1) trigger current acquisition module (2) with 1s.
A kind of failure monitoring system based on monitoring system for power distribution networks the most according to claim 1, it is characterised in that use GPRS, Zigbee, Adhoc or optical fiber to communicate between communication module one (4) and communication module two (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620284435.8U CN205450179U (en) | 2016-04-07 | 2016-04-07 | Failure monitoring system based on distribution network monitored control system |
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| CN201620284435.8U CN205450179U (en) | 2016-04-07 | 2016-04-07 | Failure monitoring system based on distribution network monitored control system |
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| CN205450179U true CN205450179U (en) | 2016-08-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462254A (en) * | 2018-03-29 | 2018-08-28 | 江苏久创电气科技有限公司 | Power network line monitoring device |
| CN109061395A (en) * | 2018-09-17 | 2018-12-21 | 国网河南省电力公司商丘供电公司 | A kind of quick positioning failure instrument of power distribution network |
-
2016
- 2016-04-07 CN CN201620284435.8U patent/CN205450179U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462254A (en) * | 2018-03-29 | 2018-08-28 | 江苏久创电气科技有限公司 | Power network line monitoring device |
| CN109061395A (en) * | 2018-09-17 | 2018-12-21 | 国网河南省电力公司商丘供电公司 | A kind of quick positioning failure instrument of power distribution network |
| CN109061395B (en) * | 2018-09-17 | 2024-02-27 | 国网河南省电力公司商丘供电公司 | Quick fault location appearance of distribution network |
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Granted publication date: 20160810 Termination date: 20180407 |
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| CF01 | Termination of patent right due to non-payment of annual fee |