CN107748315A - A kind of Distribution Network Failure active forewarning method - Google Patents
A kind of Distribution Network Failure active forewarning method Download PDFInfo
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- CN107748315A CN107748315A CN201710828298.9A CN201710828298A CN107748315A CN 107748315 A CN107748315 A CN 107748315A CN 201710828298 A CN201710828298 A CN 201710828298A CN 107748315 A CN107748315 A CN 107748315A
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- failure
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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
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- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of Distribution Network Failure active forewarning method, including：Power distribution network basic data is obtained based on production management system；The distribution transforming exit potential of taiwan area is supplied 10kV circuits to carry out calling survey together；User's voltage of all taiwan areas is carried out calling survey together；Breakdown judge foundation according to table 1 is judged failure, and failure is positioned in combination with geography information.By analyzing the distribution transforming exit potential and user's voltage of calling survey together in real time, active forewarning can be carried out to 10kV circuit breaking classes failure, distribution transforming failure, 380V low-voltage lines failure, user malfunction, can solve limitation of the prior art in basis for estimation, improve the initiative and efficiency of network distributing failure emergency repair.
Description
Technical field
The present invention relates to Distribution Network Failure technical field, more particularly to a kind of Distribution Network Failure active forewarning method.
Background technology
Often broken down during with network operation including earth fault, disconnection fault etc..Earth fault occurs for 10kV circuits
When, zero-sequence current is had, EMS system can produce singlephase earth fault alarm signal；But for disconnection fault, due to not connecing
Ground, significant change does not occur for circuit zero-sequence current in EMS system, can not find failure, the lookup difficulty of disconnection fault in time
Greatly.
Publication number CN 104297616 is detected based on multi-system information to 10kV distribution line disconnection faults, but the party
Method only considered the distribution transforming of Dyn11 wiring, not consider the distribution transforming of yyn0 wiring.But under actual operating, a 10kV line
The distribution transforming for the possible existing Dyn11 wiring of taiwan area that road is supplied, also has the distribution transforming of yyn0 wiring, the criterion that the patent is carried is judging
Limitation be present during 10kV circuit breakings；Publication number CN 106990328 propose distribution repairing abnormal data analysis, failure it is fixed
Position system, thinks be invalid failures when distribution transforming three-phase voltage current is complete in its step 4.2, but generation 10kV circuits break in practice
During line failure, taiwan area distribution transforming three-phase voltage current has, therefore the system is only applicable to power failure class failure, is not suitable for judging to break
Line class failure.
The content of the invention
The present invention provides a kind of Distribution Network Failure active forewarning method, can solve limitation of the prior art in basis for estimation
Property, improve the initiative and efficiency of network distributing failure emergency repair.
The technical solution adopted by the present invention is：A kind of Distribution Network Failure active forewarning method, it is characterised in that including following step
Suddenly：
A, power distribution network basic data, including 10kV circuits line chart, 10kV line names are obtained based on production management system
And its supplied taiwan area title；
B, it is right based on the 10kV line names in the distribution basic data obtained in step A and its supplied taiwan area title
10kV circuits supply the distribution transforming exit potential of taiwan area to carry out calling survey together；
C, based on the 10kV line names in the distribution basic data obtained in step A and its supplied taiwan area title, to institute
The user's voltage for having taiwan area carries out calling survey together；
D, the voltage based on step B and C calls survey result together, failure is judged according to the foundation of breakdown judge shown in table 1, together
When combining geographic information failure is positioned:
The breakdown judge foundation of table 1
Wherein voltage meets that one of following condition is judged as electric voltage exception：
1) phase of distribution transforming exit potential one is 0V；
2) distribution transforming exit potential one is mutually normal, and its amplitude is U1；Other two-phase voltage amplitude is respectively U2And U3, meet such as
Lower relation
3) user's voltage is 0V；
4) taiwan area user is typically uniformly connected to A, B, C three-phase, and the user's voltage magnitude for such as connecing A phases is Uc1, connect B, C two-phase
User's voltage magnitude is respectively Uc2And Uc3, meet following relationOrOr
The present invention provides through the distribution transforming exit potential and user's voltage to calling survey together in real time to analyze, can be to 10kV lines
Road broken string class failure, distribution transforming failure, 380V low-voltage lines failure, user malfunction carry out active forewarning, can solve existing skill
Limitation of the art in basis for estimation, improve the initiative and efficiency of network distributing failure emergency repair.
Brief description of the drawings
Fig. 1 show the overall procedure block diagram of Distribution Network Failure active forewarning method of the present invention；
Fig. 2 is that 10kV NJ lines simplify line chart.
Embodiment
Fig. 1 is refer to, a kind of verification of distribution topological structure and the overall procedure block diagram of maintaining method for the present invention.
Step A, power distribution network basic data is obtained based on production management system.By taking 10kV NJ lines as an example, the circuit belongs to
110kV CF transformer stations, the circuit supply taiwan area totally 74, as shown in Figure 2.
Step B, based on the power distribution network basic data obtained in step A, the 74 taiwan area distribution transformings supplied 10kV NJ lines go out
Mouth voltage carries out calling survey together, as a result as shown in table 2.
Table 2 10kV NJ lines, 74 taiwan area distribution transforming exit potentials call survey result together
Step C, based on the power distribution network basic data obtained in step A, all user's voltages of 76 taiwan areas are called together
Survey, because number of users is excessive, only displaying distribution transforming T36 supplies the voltage of user to call survey situation together here, and wherein C1~C17 is connected to A
Phase, C18~C34 connect B phases, and C35~C50 connects C phases, as shown in table 3.
The distribution transforming T36 of table 3 supplies the voltage of user to call survey result together
In step D, the taiwan area distribution transforming exit potential and user's voltage of survey are called together based on step B and step C, by taking T36 as an example
Analysis, distribution transforming T36 exit potentials call survey result together and are：A phases 185V, B phase 227.2V, C phase 46V, then
The voltage for understanding distribution transforming T36 according to 4 conditions that electric voltage exception judges meets condition 2, distribution transforming T36 electric voltage exceptions,
T35, T37, T38, T39, T40, T41, T42 electric voltage exception can be similarly drawn, this shows the 10kV circuit pack power distribution voltages
It is abnormal.
Distribution transforming T36 according to table 3 supplies the voltage of user to call survey result together, and wherein C1 is connected to A phases, voltage 184V；
C18 is connected to B phases, voltage 227V；C35 is connected to C phases, and voltage 45.5V, B phase voltage is normal, and A, C two-phase voltage meet such as
Lower relation：
It can be seen from 4 conditions that electric voltage exception judges, user's voltage that distribution transforming T36 is supplied meets condition 4, user's voltage
It is abnormal.
Inquiry, which has a power failure, to be planned, and for the 10kV circuits without the corresponding plan that has a power failure, the breakdown judge according to table 1 can according to 3
Know, the 10kV circuits are there occurs disconnection fault, the 10kV circuit line charts with reference to shown in Fig. 2, it is known that failure be located at distribution transforming T35~
Branch line where T42, through being contacted with operation maintenance personnel, for the 10kV circuits really there occurs disconnection fault, position of failure point is distribution transforming
Branch line where T35~T42, demonstrate the correctness of institute's extracting method.
Claims (1)
- A kind of 1. Distribution Network Failure active forewarning method, it is characterised in that comprise the following steps：A, based on production management system obtain power distribution network basic data, including 10kV circuits line chart, 10kV line names and its Supplied taiwan area title；B, based on the 10kV line names in the distribution basic data obtained in step A and its supplied taiwan area title, to 10kV lines Road supplies the distribution transforming exit potential of taiwan area to carry out calling survey together；C, based on the 10kV line names in the distribution basic data obtained in step A and its supplied taiwan area title, to all User's voltage in area carries out calling survey together；D, the voltage based on step B and C calls survey result together, and with reference to repair schedule, the breakdown judge according to table 1 is according to failure Judged, failure is positioned in combination with geography information.The breakdown judge foundation of table 1Wherein voltage meets that one of following condition is judged as electric voltage exception：1) phase of distribution transforming exit potential one is 0V；2) distribution transforming exit potential one is mutually normal, and its amplitude is U1；Other two-phase voltage amplitude is respectively U2And U3, meet such as ShiShimonoseki System3) user's voltage is 0V；4) taiwan area user is typically uniformly connected to A, B, C three-phase, and the user's voltage magnitude for such as connecing A phases is Uc1, meet the user of B, C two-phase Voltage magnitude is respectively Uc2And Uc3, meet following relationOrOr
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742854A (en) * | 2018-12-27 | 2019-05-10 | 国网吉林省电力有限公司电力科学研究院 | It is a kind of that method is actively reported for repairment based on intelligent electric meter data processing |
| CN111398859A (en) * | 2020-03-17 | 2020-07-10 | 国网江西省电力有限公司电力科学研究院 | User low-voltage cause big data analysis method and system |
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| CN109742854A (en) * | 2018-12-27 | 2019-05-10 | 国网吉林省电力有限公司电力科学研究院 | It is a kind of that method is actively reported for repairment based on intelligent electric meter data processing |
| CN111398859A (en) * | 2020-03-17 | 2020-07-10 | 国网江西省电力有限公司电力科学研究院 | User low-voltage cause big data analysis method and system |
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| CN107748315B (en) | 2019-09-27 |
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