CN104297616B - A kind of 10kV distribution line broken string method for detecting interacted based on multi-system information - Google Patents
A kind of 10kV distribution line broken string method for detecting interacted based on multi-system information Download PDFInfo
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Abstract
A kind of 10kV distribution line broken string method for detecting interacted based on multi-system information, it is realized by multiple operation monitoring system information interaction technology on the basis of existing grid operating monitoring system.The method provides 10kV distribution line line broken string warning informations using distributing transformer monitoring data for operations staff on the basis of the three-dimensional network of transformer station's outlet branch line distribution transforming typical low pressure side, solve 10kV distribution lines disconnection fault and find difficult realistic problem, method can be in provincial power network Operation Monitoring Center centralized arrangement simultaneously, unified O＆M, realize the whole province 10kV distribution line line broken string detecting alarms, jump out conventional electric power system automatics often to stand the pattern of advancing equipment, greatly reduce equipment purchasing, installation and debugging, the input of daily O＆M maintenance, lifting distribution operational reliability, the cost input of Utilities Electric Co. is greatly reduced while the potential safety hazard for reducing circuit breaking initiation human casualty accident, possess preferable economic benefit and safety benefit.
Description
Technical field
The present invention relates to a kind of 10kV distribution line broken string method for detecting interacted based on multi-system information, belongs to power information
Technical field of automation.
Background technology
In China's network system, 10kV circuits are not solidly grounded system, once there is singlephase earth fault in 10kV circuits
Or even disconnection fault, 10kV protection for feed line directly will not trip, but show as this one phase voltage of feeder line place bus and be reduced to
Zero, another two-phase voltage rises to 1.732 times of specified phase voltage, but the line voltage of this feeder line is still normal.
Singlephase earth fault is generally judged by the Small Electric Current Earthing And Routing Device installed in transformer station at present.Provincial electricity
Net has quite a few transformer station not install Small Electric Current Earthing And Routing Device, and is provided with the power transformation of Small Electric Current Earthing And Routing Device
Stand, due to Small Electric Current Earthing And Routing Device self problem, transformer station's integrated system can only judge that certain section of bus goes out to a portion
Existing singlephase earth fault, it is impossible to accurately judge single-phase earthing or disconnection fault 10kV circuits.Advise further according to management and running
Journey, due to not affecting user power utilization, 10kV circuits still run 2 hours in the case of it there is singlephase earth fault, but if send out
Raw is disconnection fault, and still charging operation can bring very big potential safety hazard to circuit, can cause human casualty accident when serious.Therefore
10kV line disconnection failures are found in time, respective handling measure are taken for avoiding state's electricity grid company industrial accident from having
Significance.
China power system 10kV systems are not solidly grounded system, distribution transformer mainly based on Dyn11 wiring, when
When 10kV circuits occur singlephase earth fault, transformer station shows as this one phase voltage of feeder line place bus and is reduced to zero, another two-phase
Voltage rises to 1.732 times of specified phase voltage, but the line voltage of this feeder line is still normal.If there is disconnection fault in 10kV circuits,
And disconnection fault point is unearthed, now in transformer station, operating condition, without significant change, will not even report singlephase earth fault, if
Break point is nearer apart from mains side, and operations staff can reduce to judge circuit operation exception by the phase current that breaks, if but breaking
From mains side farther out, then the phase current reduces not substantially point, finds that failure brings very big difficulty in time to operations staff.In addition with
The popularization of unattended operation transformer station, transformer station generally takes Centralized Monitoring pattern, and operator operator monitoring amount is big,
It was found that the phase load electric current reduction difficulty of certain 10kV feeder line is very big.
Content of the invention
The purpose of the present invention is, in order to solve the detection problem of 10kV distribution lines broken string, the utility model proposes a kind of
Based on the 10kV distribution line broken string method for detecting that multi-system information is interacted.
Realization the technical scheme is that, for the network system for being provided with EMS system and power information acquisition system,
This method utilizes the singlephase earth fault alarm signal in the real-time managing and control system Real-time Collection EMS system of production, according in system
Corresponding relation, search is connected on distribution transformer low-pressure side voltage signal on this section of bus on all 10kV feeder lines, such as finds
There is distribution transformer low-pressure side voltage specific change occur, then judge that this feeder line there occurs that disconnection fault, system are sent at once
Alarm signal takes treatment measures to repair personnel.
The step of realizing of 10kV distribution line broken string method for detecting that the present invention is a kind of to be interacted based on multi-system information is：
(1) the daily normal operation of the real-time managing and control system of production, collection EMS system and power information acquisition system are monitored
10kV distribution lines and distribution transformer operation information are simultaneously stored in data center；
(2) the 10kV distribution lines line broken string detecting application module in real-time managing and control system is produced according to distribution transformer monitoring data frequency
10kV distribution line single-phase earthing signals in rate retrieval data storage center；
(3) after 10kV distribution lines line broken string detecting application module detects 10kV distribution line single-phase earthing signals, according to
The three-dimensional network of transformer station-outlet-branch line-distribution transforming-typical low pressure side, starts to retrieve the 10kV distribution lines
Lower institute's tape splicing distribution transformer the last time and next time operational monitoring data；
(4) to distribution transformer, operational monitoring data are analyzed 10kV distribution lines line broken string detecting application module twice,
When such as finding that certain power distribution voltage Monitoring Data reaches alarm threshold value, i.e., the distribution low-voltage side voltage has one mutually normally, and another two
The amplitude of phase judges that between the 40%-60% of rated voltage amplitude, then the circuit may occur disconnection fault；
(5) 10kV distribution lines line broken string detecting application module sends the distribution line broken string alarm signal, with short message mode
Supervisory control of substation personnel are notified to take break line treatment measure to the 10kV distribution lines.
The 10kV distribution lines line broken string detecting application module is software module, and its function is by distribution transformer low-pressure side
Voltage magnitude variable quantity is counter to push away 10kV distribution lines broken string, and decision threshold range intervals are big；Can pass through to lift power information collection
System improved the detecting speed broken by 10kV distribution lines to the operation information frequency acquisition of distribution transformer, at 30 minutes
10kV distribution line disconnection fault is inside detected；Generalized information system (GIS-Geographic Information System) information, 10kV distribution lines broken string is coordinated to detect
Survey application module and also can achieve the fault location to 10kV distribution line break points.
The general principle of the present invention is that China power system 10kV systems are not solidly grounded system, distribution transformer master
Will be based on Dyn11 wiring, when 10kV circuits occur singlephase earth fault, transformer station shows as this one phase of feeder line place bus
Voltage is reduced to zero, and another two-phase voltage rises to 1.732 times of specified phase voltage, but the line voltage of this feeder line is still normal.If
There is disconnection fault in 10kV circuits, and disconnection fault point is unearthed, now in transformer station operating condition without significant change, not even
Singlephase earth fault can be reported, if break point is nearer apart from mains side, operations staff can reduce to judge by the phase current that breaks
Circuit operation exception, if but break point from mains side farther out, the phase current reduces substantially, found to operations staff in time therefore
Barrier brings very big difficulty.In addition with the popularization of unattended operation transformer station, transformer station generally takes Centralized Monitoring pattern, runtime value
Class monitored by personnel workload is big, will find that a phase load electric current of certain 10kV feeder line reduces difficulty very big.Therefore, accurately and
When detecting 10kV feeder lines there is disconnection fault, it is impossible to only rely on substation equipment operation information and judged, and will be in conjunction with the line
Road distribution transformer operation information.There is Dyn11 distribution transformers fortune after Down-Line Fault Analysis break point with 10kV feeder lines below
The change of row operating mode.
When normal, 10kV feeder line UA、UB、UCAmplitude is 5.77kV, 120 ° of phase, distribution transformer high-pressure side voltage
UA＇ UB＇ UC＇ amplitudes are 5.77kV, 120 ° of phase, and distribution low-voltage side output voltage Ua, Ub, Uc amplitude is 220V, phase place
120 ° of difference, wiring schematic diagram is as shown in Figure 5.
When A phases break, 10kV feeder line UA、UB、UCAmplitude is 5.77kV, and 120 ° of phase, distribution transformer are high
Pressure side A phase voltages are 0, and B, C phase voltage is 5.77kV, phase place with normal when keep constant, wiring schematic diagram is as shown in Figure 6.This
When distribution transformer low-pressure side output voltage be phase that Ua, Ub, Uc amplitude is respectively 110V, 220V, 110V, a phase and c phase voltages
Position is identical and 180 ° of phase with b phases.
The invention has the beneficial effects as follows, the inventive method is set up on the basis of existing grid operating monitoring system, need not
Increase hardware device.This method is useful in provincial power network Operation Monitoring Center centralized arrangement, unified O＆M, realizes that the whole province 10kV matches somebody with somebody
Electric line disconnection monitoring, does not increase company of ground cities and counties of the whole province maintenance work amoun.
Description of the drawings
Fig. 1 is 10kV distribution line disconnection fault detecting flow process figures；
Fig. 2 is the real-time managing and control system of production and remaining system connected mode schematic diagram；
Fig. 3 is the real-time managing and control system Technical Architecture schematic diagram of production；
Fig. 4 is the real-time managing and control system building-block of logic of production；
Fig. 5 is the normal operation wiring schematic diagram of 10kV distribution lines；
Fig. 6 is 10kV distribution line broken string operation wiring schematic diagrams.
Specific embodiment
The present invention is embodied as in Jiangxi Province's electrical network：
The present invention implements to include data acquisition, the bus singlephase earth fault signal in collection transformer station's signal；10kV matches somebody with somebody
Electric line line broken string detecting application module to distribution transformer operational monitoring and analysis, judge disconnection fault that circuit may occur and
Send the distribution line broken string alarm signal.
The data acquisition of the present embodiment is using power information acquisition system and EMS (EMS).
EMS system has been had in all 12 prefecture-level companies of Jiangxi Province Power Network company at present, and EMS system achieves ground county and adjusts one
Body, can realize all comprehensive monitorings and control from transformer station of the prefecture-level company and administrative company of county, by EMS system, can
Obtain the corresponding relation of substation bus bar singlephase earth fault information and all 10kV feeder lines and 10kV buses.
Jiangxi Province Power Network company builds power information acquisition system, covers 130,000 public distribution transformers of the whole province, covers
Rate up to 97.6%, by the data collection station Real-time Collection distribution transformer working voltage that is installed on distribution transformer, electricity
Stream, power and electric quantity data, and by GPRS information transmissions to provincial company power information acquisition system main website.
As substation equipment operation information and distribution transformer operation information adhere to different system separately, public according to national grid
Department's safety management regulations, EMS system data are stored in 1st area, and power information acquisition system data are stored in 3rd area, are to obtain two
System data realizes that senior application, Jiangxi Province Power Network company have been built up the real-time managing and control system of production by exchange technology, passed through
Develop data-interface respectively with EMS system and power information acquisition system, collect EMS system substation equipment operation information and
Distribution transformer operation information, it is achieved that EMS system and the data sharing of power information acquisition system, produces real-time management and control at present
System has been accessed with distribution transforming collecting device 132280 is adopted, and districts and cities and company of county plant stand access 1450, distribution line 9000
Bar, and corresponding low-pressure side user data.The three-dimensional network for building up transformer station-outlet-branch line-distribution transforming-typical low pressure side is opened up
Flutter relation.Produce real-time managing and control system as shown in Figure 2 with remaining system connected mode.
The self-built data storage center of real-time managing and control system is produced, can will be collected from EMS system and used telecommunications
Breath acquisition system information Store is in data center, and develops application service layer and presentation layer on the basis of data center,
Application service layer is analyzed process on the basis of data center, realizes various application functions, presentation layer as system terminal,
The web access functions of system terminal are achieved, user can realize the long-range visit to system by the communication information net of provincial company
Ask function.The concrete framework of system is shown in Fig. 3, and logical hierarchy is divided sees Fig. 4.
As shown in figure 3, the real-time managing and control system general frame of production includes：
Data active layer：The data source of the system comes from major network PMS, rural power PMS, the plant stand EMS access system of various places, use
Electric acquisition system, fault-indicating system, distribution automation, distribution transformer terminals monitoring.
Access service layer (Integration Center)：The system is studied in CIM/CIS, WebServices technology and data normalization
On the basis of, data are integrated, uniform data collection and data address bus platform is established, it is achieved that between each system application
Point-to-point crossover network be connected to data/address bus come enter row information exchange transformation.In order to realize data in each system
Between convenient exchange, switching centre of the data/address bus as data, it is achieved that electric network model and real-time grid data interim
Real-time is stored, the newest section of bus storage electric network model and real time data.Data/address bus is responsible for obtaining number from data active layer
According to, and data are provided to data center's layer.
Data storage layer (data center)：Data storage layer is to obtain data by data access bus layer, sets up application
Unrelated electric network data center, including real time data, historical data, artwork data etc., wherein real-time data base, historical data base
Deng with standard, unified, open, transparent pattern, safe efficient, open, transparent data clothes are provided to multiple applications
Business, is truly realized Distributed database service management.Data center adopts Unified coding, historical data to adopt device model object
With standardization, normalization storage mode, realize that normalized data access service provides basis for each business datum.
Data analysis layer (service center)：By data version management, Data Quality Analysis, fault trip analysis, data
Arrangement, school of the functional realieys such as model management, historical data management, real time data releasing, artwork management to data centre data
Test, calculate, analyzing etc. and maintenance management function is uniformly processed, making data meet the service application needs of various situations.And by number
Significant information is excavated from the data of magnanimity according to the service such as service, aid decision, realize electrical network general and specific point
Analysis, studies and judges including circuit, transformer tripping, current break is calculated, circuit transships calculating, distribution transforming again and transships calculating, the quality of data again
Analysis, circuit, distribution transforming stoppage in transit analysis, the analysis of distribution transforming unusual service condition etc., to instruct the routine work of electrical network production run personnel.
Application presentation layer (data portal)：Based on controller switching equipment Monitoring Data center and data, services, in conjunction with specific transactions
Need and various analysis models, using collection SVG figure plug-in units, portlet technology, Flash icon-based techniques, Ajax the and Flex pages
Technology etc. realizes distribution transforming real-time monitoring, distribution line monitoring, distribution fault tripping operation point in the uniform data exhibition platform of one
The function such as analysis, distribution power supply capability analysis, distribution transformation analysis, realizes to transformer station-outlet-branch line-distribution transforming-low pressure allusion quotation
The three-dimensional real-time management and control of type user, controls in real time 10kV outlets, distribution transforming, the voltage of user side, electric current, active, idle；To setting
The standby general level of the health is analyzed, and analyzes electrical network weak link, and secondary distribution net is transformed, realize being analyzed power distribution network, diagnose,
Assessment and evaluation.
10kV distribution lines broken string detecting function can be realized according to following steps：
1) the daily normal operation of the real-time managing and control system of production, collection EMS system and power information acquisition system are monitored
10kV distribution lines and distribution transformer operation information are simultaneously stored in data center；
2) the 10kV distribution lines line broken string detecting application module in real-time managing and control system is produced according to distribution transformer monitoring data frequency
10kV distribution line single-phase earthing signals in rate retrieval data storage center；
3) after 10kV distribution lines line broken string detecting application module detects 10kV distribution line single-phase earthing signals, according to change
The three-dimensional network of power station-outlet-branch line-distribution transforming-typical low pressure side, starts to retrieve under the 10kV distribution lines
Institute's tape splicing distribution transformer the last time and next time operational monitoring data；
4) to distribution transformer, operational monitoring data are analyzed 10kV distribution lines line broken string detecting application module twice, such as
It was found that when certain power distribution voltage Monitoring Data reaches alarm threshold value, i.e., the distribution low-voltage side voltage has mutually normal, an another two-phase
Amplitude judge that the circuit may occur disconnection fault between the 40%-60% of rated voltage amplitude, then；
5) 10kV distribution lines line broken string detecting application module sends the distribution line broken string alarm signal, logical with short message mode
Know that supervisory control of substation personnel take break line treatment measure to the 10kV distribution lines.
The method has following technical characteristic：
1) realized with software function module form based on existing grid monitoring system, be not required to add any hardware；
2) principle is simple, and feature substantially, pushes away 10kV distribution wires by distribution transformer low-pressure side voltage amplitude variable quantity is counter
Road is broken, and decision threshold range intervals are big, and application is convenient；
3) can be right to improve to the operation information frequency acquisition of distribution transformer by lifting power information acquisition system
The detecting speed of 10kV distribution lines broken string, by current level, under most harsh conditions in 30 minutes can detect 10kV and match somebody with somebody
Electric line disconnection fault；
4) coordinate generalized information system (GIS-Geographic Information System) information, can achieve the fault location to 10kV distribution line break points.
Claims (2)
1. a kind of based on multi-system information interact 10kV distribution line broken string method for detecting, it is characterised in that methods described profit
With the real-time managing and control system of production, the singlephase earth fault alarm signal in Real-time Collection EMS system；According to the corresponding pass in system
System, search are connected on the distribution transformer low-pressure side voltage signal on 10kV distribution lines on all 10kV feeder lines, judge that feeder line is sent out
Raw disconnection fault, methods described realize that step is as follows：
(1) 10kV distribution lines and distribution transformer operation information that EMS system and power information acquisition system are monitored are collected
And it is stored in data center；
(2) the 10kV distribution lines line broken string detecting application module produced in real-time managing and control system is examined according to distribution transformer monitoring data frequency
10kV distribution line single-phase earthing signals in rope data storage center；
(3) after 10kV distribution lines line broken string detecting application module detects 10kV distribution line single-phase earthing signals, according to power transformation
Stand-the three-dimensional network of outlet-branch line-distribution transforming-typical low pressure side, start to retrieve institute under the 10kV distribution lines
Tape splicing distribution transformer the last time and next time operational monitoring data；
(4) to distribution transformer, operational monitoring data are analyzed 10kV distribution lines line broken string detecting application module twice, such as send out
When existing certain power distribution voltage Monitoring Data reaches alarm threshold value, i.e., the distribution low-voltage side voltage has one mutually normally, another two-phase
Amplitude judges that between the 40%-60% of rated voltage amplitude, then the circuit may occur disconnection fault；
(5) 10kV distribution lines line broken string detecting application module sends the distribution line broken string alarm signal, is notified with short message mode
Supervisory control of substation personnel take break line treatment measure to the 10kV distribution lines.
2. a kind of 10kV distribution line broken string method for detecting interacted based on multi-system information according to claim 1, which is special
Levy and be, the 10kV distribution lines line broken string detecting application module is software module, and its function is by distribution transformer low-pressure side
Voltage magnitude variable quantity is counter to push away 10kV distribution lines broken string, and decision threshold range intervals are big；By lifting power information collection system
Uniting, the detecting speed broken by 10kV distribution lines is improved to the operation information frequency acquisition of distribution transformer, can be at 30 minutes
10kV distribution line disconnection fault is inside detected；Generalized information system information, 10kV distribution line line broken string detecting application modules is coordinated may be used also
Realize the fault location to 10kV distribution line break points.
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