CN109374995A - Low-voltage distribution system, aging circuit and oppose electricity-stealing monitoring method and correspondence system - Google Patents
Low-voltage distribution system, aging circuit and oppose electricity-stealing monitoring method and correspondence system Download PDFInfo
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- CN109374995A CN109374995A CN201810918461.5A CN201810918461A CN109374995A CN 109374995 A CN109374995 A CN 109374995A CN 201810918461 A CN201810918461 A CN 201810918461A CN 109374995 A CN109374995 A CN 109374995A
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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
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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
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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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
- G01R31/088—Aspects of digital computing
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Abstract
The present invention relates to low-voltage distribution system, aging circuits and oppose electricity-stealing monitoring method and correspondence system, according to the impedance value of the voltage value of user's intelligent electric meter and the corresponding user's distribution line of current value computational intelligence ammeter, and it is compared with setting impedance threshold, if the impedance value acquired is more than or equal to setting impedance threshold, the corresponding user's distribution line aging of the intelligent electric meter is determined.Therefore, this method can monitor aging circuit situation on-line, can identify route degree of aging in time, so that it is horizontal to improve low-voltage distribution active O&M, and improve customer power supply reliability.In addition, illustrating that ammeter may be shorted in user's distribution line if monitoring that user's distribution line impedance value persistently increases suddenly, then may determine that user, there are stealing suspicion, so, which can also be used to monitoring of opposing electricity-stealing, and protect electric power property safety.
Description
Technical field
The present invention relates to low-voltage distribution system, aging circuits and oppose electricity-stealing monitoring method and correspondence system.
Background technique
With fully under way, the electric system various aspects of the fast development of power system technology, especially smart grid
Achieve quantum jump.However be substantially passive type O&M in field of distribution network, especially 380/220V low-voltage distribution field,
Lack active O&M measure, let alone intelligent.
With the development of intelligent electric meter technology and the implementation of power user power consumption information acquisition system, intelligent electric meter can
To provide a large amount of useful datas, some active O&M measures may be implemented using these data, ensure the power supply quality of user.
Such as: a kind of intelligent electric meter monitoring system is disclosed in the Chinese patent document that Authorization Notice No. is CN206920593U, including
Master station's control device, master station's control device and each substation control device are connected to the network, substation control device and corresponding each electricity
Energy table communication connection, obtains the status data of each electric energy meter.
As shown in Figure 1, it is a kind of typical low-voltage distributing line figure, including 10KV/380V transformer, the examination of platform area are always
The equipment such as table, intelligent electric meter and some other breaker.With the enhancing of productivity, people's lives level is improved, every household family
Many high-power electric appliances have been bought at family, and user power utilization load sometimes is very heavy, and distribution line nominal load is certain, when many routes are long
Between work overloadingly, cause aging circuit serious, affect the power supply reliability of user, fire can be caused under more serious situation
Accident, thus the person and property are caused potentially to threaten.
Low-voltage distributing line user is numerous, and connection is complicated.In order to not influence the appearance of the city, more and more routes are using ground
The mode for burying cable is powered, this results in being difficult to manually mode and finds circuit question.However, current power distribution network O&M not to
Family distribution line is monitored on-line, only fault outage user dial 95598 after power supply company just know it is faulty.Once line
Road aging disconnects, and will result in user's power failure, takes a long time to solve failure, not only power supply quality is caused to decline, powers
Company is also possible to face the complaint of user.
After distribution line aging disconnects, if route is overhead line, searched with the human eye mode of checking, if route is ground
Cable is buried, then failure can be searched using electric cable failure detector.During this, user may need to restrain oneself to stop for a long time
Electricity, and maintenance personal needs to take much more to search failure.
Summary of the invention
The object of the present invention is to provide a kind of low-voltage customer distribution line aging monitoring methods, to solve existing low pressure
The poor problem of distribution line degradation detecting method reliability.Present invention simultaneously provides a kind of low-voltage customer distribution line aging prisons
Oppose electricity-stealing monitoring method, a kind of low-voltage customer distribution line of examining system, a kind of low-voltage customer distribution line is opposed electricity-stealing monitoring system
And two kinds of low-voltage distribution systems.
To achieve the above object, the present invention includes following technical scheme.
A kind of low-voltage customer distribution line aging monitoring method, comprising the following steps:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) compare the impedance value acquired and setting impedance threshold, if the impedance value acquired is more than or equal to the setting
Impedance threshold then determines the corresponding user's distribution line aging of the intelligent electric meter.
This programme is the voltage and current data by acquiring user's intelligent electric meter, and utilizes collected voltage and current
Data are handled, to obtain the impedance value of user's distribution line, are then compared with setting impedance threshold.Due to route
The impedance value of degree of aging and route has close relationship, then, if the impedance value acquired is more than or equal to setting impedance
Threshold value, line impedance increase to a certain degree, illustrate the corresponding user's distribution line aging of the intelligent electric meter.Therefore, the party
Method can real time on-line monitoring aging circuit degree, aging circuit can be identified in time, greatly reduced because circuit and equipment are old
Failure caused by change improves low-voltage distribution active O&M level, mitigates operation maintenance personnel burden, improve to realize active O&M
Power supply reliability.Also, it does not use the human eye mode of checking and carries out lookup failure, reliability is higher, moreover, when route is buried
When cable, failure is searched without special electric cable failure detector, reduces input cost.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
A kind of low-voltage customer distribution line ageing monitoring system, including a kind of control module, the control module include depositing
Reservoir, processor and storage in the memory and the computer program that can run on the processor, the processing
The control process that device is realized when executing the computer program includes:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) compare the impedance value acquired and setting impedance threshold, if the impedance value acquired is more than or equal to the setting
Impedance threshold then determines the corresponding user's distribution line aging of the intelligent electric meter.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
A kind of low-voltage distribution system, including system main website, distribution line and intelligent electric meter corresponding with each user, the system
System main website and each intelligent electric meter communication connection, the system main website acquire each intelligent electric meter according to the calculating time interval of setting
Voltage value and current value, and according to the voltage value of acquisition and the corresponding user's distribution line of the corresponding intelligent electric meter of current value calculating
Impedance value；Then, compare the impedance value acquired and setting impedance threshold, if the impedance value acquired is more than or equal to described set
Constant impedance threshold value then determines the corresponding user's distribution line aging of corresponding intelligent electric meter.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
A kind of low-voltage customer distribution line is opposed electricity-stealing monitoring method, comprising the following steps:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) if the impedance value acquired persistently increases in a set period of time, determine the corresponding user of the intelligent electric meter
There are stealing suspicion.
If monitoring that user's distribution line impedance value persistently increases, i.e., persistently increases the regular hour, illustrate that user matches
Ammeter may be shorted in electric line, then may determine that user, there are stealing suspicion.So passing through the change for monitoring line impedance value
Changing situation can be used in monitoring of opposing electricity-stealing, and protect electric power property safety.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
A kind of low-voltage customer distribution line is opposed electricity-stealing monitoring system, including a kind of control module, and the control module includes
Memory, processor and storage in the memory and the computer program that can run on the processor, the place
Managing the control process that device is realized when executing the computer program includes:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) if the impedance value acquired persistently increases in a set period of time, determine the corresponding user of the intelligent electric meter
There are stealing suspicion.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
A kind of low-voltage distribution system, including system main website, distribution line and intelligent electric meter corresponding with each user, the system
System main website and each intelligent electric meter communication connection, the system main website acquire each intelligent electric meter according to the calculating time interval of setting
Voltage value and current value, and according to the voltage value of acquisition and the corresponding user's distribution line of the corresponding intelligent electric meter of current value calculating
Impedance value；Then, if the impedance value acquired persistently increases in a set period of time, then determine that the intelligent electric meter is corresponding
User there are stealing suspicion.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
Detailed description of the invention
Fig. 1 is low-voltage distribution system connection schematic diagram；
Fig. 2 is low-voltage distributing line connection simplified model figure；
Fig. 3 is low-voltage distributing line aging monitoring method flow diagram；
Fig. 4 is the change curve schematic diagram of user's distribution line impedance.
Specific embodiment
Low-voltage distribution system embodiment one
As shown in Figure 1, low-voltage distribution system includes 10KV/380V transformer, (platform area examines summary table only to platform area examination summary table
An equipment), the equipment such as the corresponding intelligent electric meter of each user and some other breaker.Intelligent electric meter can be according to setting
Interval saves load curve, including voltage and current data.Distribution system main website is acquired by power consumer electricity consumption information
System obtains the load curve that user's intelligent electric meter saves, and carries out distribution line impedance using voltage and current data therein
The calculating of value.
As shown in Figure 1, the user in low-voltage distribution system has single-phase electricity user, there are also three-phase electricity users, for three-phase electricity
User can be equal to three single-phase electricity users.Fig. 2 is low-voltage distributing line connection simplified model figure, the user in figure
It is single-phase electricity user.
Firstly, the calculation formula of user's distribution line impedance value can be derived using simplified model, it is specific as follows:
Assuming that Circuit Fault on Secondary Transformer voltage is invariable, then it can use the resistance that following formula derives user's distribution line
Anti- value:
That is: Z=Rd+Rcn, it is user's distribution line impedance value.
Algorithm above be premised on Circuit Fault on Secondary Transformer voltage is constant, and when Circuit Fault on Secondary Transformer voltage change,
When the indoor impedance of user is constant, the value that Δ V/ Δ I is calculated is the indoor impedance of user, and is positive value.If same net
Other users throwing in network is when moving back, and the indoor impedance of user is constant, then it is indoor to be equivalent to Circuit Fault on Secondary Transformer voltage change, user
The constant situation of impedance, measured value is also the indoor impedance of user at this time.And when Circuit Fault on Secondary Transformer voltage is constant, the indoor resistance of user
When resistance, the value that Δ V/ Δ I is calculated is the impedance of user's distribution line, and is negative value.Thus in calculating process, such as
The value that fruit is calculated is greater than 0 and is ignored as, and the value being calculated then takes it and just retain afterwards less than 0, this value is user
Distribution line impedance value.If other users while user's indoor impedance variations in consolidated network have throwing to move back, due to observation
The voltage fall arrived is higher, and the distribution line impedance value measured also can be higher, can be by making even for this deviation
Mean value influences to reduce, this average value is user's distribution line impedance value in time period.
System main website receives the detection data (including voltage value and current value) of each intelligent electric meter, and system main website is according to setting
Calculating time interval come call together survey the intelligent electric meter voltage value and current value.Then main website is according to the voltage value and electric current of acquisition
Value Data calculates the impedance value of the corresponding user's distribution line of the intelligent electric meter, and a kind of calculating process is given below:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M be system intelligent electric meter sum, N is to call the intelligence measured together
The total number of the chill point of meter voltage value and current value.
2) N-1 impedance value can be always obtained according to above-mentioned calculation formula, numerical value is negative in the impedance value recorded
The impedance value of value, and obtain the number m for the impedance value that numerical value is negative value.
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate should and value with it is a
The quotient of number m, obtains the average value of impedance value, which is exactly the required corresponding user's distribution line of j-th of intelligent electric meter
Impedance value.
In above-mentioned impedance value calculating process theory, if indoor impedance is constant, and route head end voltage changes (other use
Family load variation causes or Circuit Fault on Secondary Transformer voltage change causes) in the case where, obtained " impedance value " is indoor impedance
Value, and be positive value, this value is bigger, minimum to be generally several ohm, for the time being referred to as maximum value；If indoor impedance variations, but
In the case that route head end voltage is constant, obtained " impedance value " is the impedance value (this value is target value) of user's distribution line,
And be negative value, this value is smaller, and normal value is in -0.1 ohms, referred to as minimum value for the time being；Since a period can only obtain
To an impedance value, thus theoretically the value of Δ V/ Δ I in the section of minimum value to maximum value.In practice, indoor impedance
May all it change with route head end voltage, deviation caused by route head end voltage changes can be reduced by rejecting positive impedance value.And
And theoretically the smallest negative value only takes negative minimum unreliable closest to true value, but since the factors such as measurement error exist,
It averages so negative value negates, final result can be made to stablize, increase confidence level.
Finally compare the impedance value acquired and setting impedance threshold, if the impedance value acquired is more than or equal to setting impedance
Threshold value illustrates the corresponding user's distribution line aging of the intelligent electric meter.
Based on above-mentioned monitoring process, a kind of application example is given below.
Step a, system main website obtains in some user's intelligent electric meter 24 hours every 15 minutes primary (synchronization)
Voltage value and current value, then, monitoring time section is 24 hours, and the sampling period is 15 minutes.
Step b, by the chronological order of voltage value and current value, between successively being calculated according to following formula adjacent 15 minutes
Every user's distribution line impedance value:
Wherein, Vna、InaAnd Vnb、InbThe respectively voltage value and current value of the two neighboring time interval of user's intelligent electric meter.
Step c, it is ignored as Z>0, just retains and negate as Z<0, while recording the number of Z<0 in measuring section
m。
Step d, divided by m after the Z value retained in step c being added, to obtain its average value, this average value is the intelligence
The impedance value that the corresponding user's distribution line time period of energy ammeter measures.
Step e, step a~d is repeated, the impedance value of other users distribution line is obtained.
The threshold value for the criterion that breaks, i.e. setting impedance threshold need to consider resistance variations under normal operation, noise, mistake
Difference and rate of ageing.Under normal circumstances, increase by 0.03 ohm for every 100 meters of distribution line impedance, but generally in 0.1~0.2 Europe
Between nurse.Therefore, setting impedance threshold for 0.2 ohm, when distribution line impedance value be greater than 0.2 ohm, illustrate user's line
Road is weathered.
Step f, step a~e is repeated, all user's distribution line impedance values of subsequent period are obtained.
Therefore, period user's distribution line impedance value can be calculated by above method, weighed at regular intervals
New to calculate subsequent period user distribution line impedance value, calculation flow chart is as shown in Figure 3.Constantly obtain user's distribution line
Impedance value, so that it may user's distribution line impedance variations curve is obtained, aging circuit rate is judged by impedance variations curve, and
By variation tendency look-ahead disconnection fault, as shown in Figure 4.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned low-voltage distributing line aging monitoring method, and above-described embodiment illustrates this in conjunction with a kind of low-voltage distribution system
Monitoring method.So can also be other system structures, for example authorize the invention is not limited to the low-voltage distribution system
Notification number is system disclosed in the Chinese patent document of CN206920593U.In the feelings for not departing from the principle and spirit of the invention
The change, modification, replacement and modification carried out under condition to embodiment are still fallen in protection scope of the present invention.
Low-voltage distributing line aging monitoring method embodiment
The present embodiment provides a kind of low-voltage distributing line aging monitoring methods, comprising the following steps: (1) according to the meter of setting
Evaluation time interval acquires the voltage value and electric current Value Data of some intelligent electric meter；(2) according to the voltage value of acquisition and current value
Calculate the impedance value of the corresponding user's distribution line of the intelligent electric meter；(3) compare the impedance value acquired and setting impedance threshold, if
The impedance value acquired is more than or equal to the setting impedance threshold, then determines that the corresponding user's distribution line of the intelligent electric meter is old
Change.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value.
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m。
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
As soon as being repeated no more here due to the detailed description for having provided this method in above-mentioned low-voltage distribution system embodiment.
Moreover, this method can be applied in above-mentioned low-voltage distribution system, can also apply in existing distribution system, utilization is existing
Power user power consumption information acquisition system acquire user's intelligent electric meter voltage and current data.Whether guard system is not existing system
System, as long as the low-voltage distributing line aging monitoring method is utilized, is within the scope of the invention.
The above method can be used as a kind of computer program, is stored in low-voltage distributing line ageing monitoring system and controls mould
It is run in processor in memory in block, and in the control module.
Low-voltage distribution system embodiment two
The present embodiment provides a kind of low-voltage distribution system, the structure of the distribution network system is identical as above-described embodiment one, and
And the distribution network system also has line impedance monitoring function, still, the effect for detecting line impedance is monitoring of opposing electricity-stealing.That is,
It is the same as example 1, low-voltage distribution system provided in this embodiment includes system main website, distribution line and corresponding with each user
Intelligent electric meter, system main website and each intelligent electric meter communication connection, it is each that system main website according to the calculating time interval of setting calls survey together
The voltage value and electric current Value Data of intelligent electric meter, and corresponding intelligent electric meter is calculated according to the voltage value of acquisition and current value and is corresponded to
User's distribution line impedance value.Difference is: after system main website acquires impedance value, being compared, i.e., will with history value
This calculated impedance value is compared with last calculated impedance value, if in a set period of time, impedance value
Lasting to increase, i.e., in the set period of time, for any two adjacent impedance values, this impedance value acquired is persistently greater than
The impedance value once acquired then determines that there are stealing suspicion by the corresponding user of the intelligent electric meter.
Therefore, if monitoring that user's distribution line impedance value persistently increases suddenly, illustrate intelligence in user's distribution line
Ammeter may be shorted, then may determine that user, there are stealing suspicion, for opposing electricity-stealing, protect electric power property safety.
And calculating process and other skills for the line impedance value in low-voltage distribution system provided in this embodiment
Art means are the same as example 1, and are just no longer illustrated here.
Low-voltage distributing line is opposed electricity-stealing monitoring method embodiment
It opposes electricity-stealing monitoring method the present embodiment provides a kind of low-voltage distributing line, comprising the following steps: (1) according to setting
Time interval is calculated, the voltage value and electric current Value Data of some intelligent electric meter are acquired；(2) according to the voltage value of acquisition and electric current
Value calculates the impedance value of the corresponding user's distribution line of the intelligent electric meter；(3) if in a set period of time, the impedance that acquires
Value is lasting to be increased, and determines that there are stealing suspicion by the corresponding user of the intelligent electric meter.
Further, the impedance value of user's distribution line includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculate public
Formula is as follows:
Wherein, Vji+1And Iji+1Freeze the electricity at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
Pressure value and current value, VjiAnd IjiFreeze the voltage value at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
And current value, j=1,2 ..., M, i=1,2 ..., N-1, M is the sum of system intelligent electric meter, and N is to call together and measure intelligent electricity
The number of the chill point of table voltage value and current value.
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number for the impedance value that numerical value is negative value
m。
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth and
The quotient of the number m, obtains the average value of impedance value, which is exactly that the required corresponding user of j-th of intelligent electric meter matches
The impedance value of electric line.
It opposes electricity-stealing monitoring method due to having provided low-voltage distributing line in above-mentioned low-voltage distribution system embodiment one and two
It is described in detail, just repeats no more here.
The above method can be used as a kind of computer program, is stored in low-voltage distributing line and opposes electricity-stealing and controls in monitoring system
It is run in processor in memory in module, and in the control module.
Claims (10)
1. a kind of low-voltage customer distribution line aging monitoring method, which comprises the following steps:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) compare the impedance value acquired and setting impedance threshold, if the impedance value acquired is more than or equal to the setting impedance
Threshold value then determines the corresponding user's distribution line aging of the intelligent electric meter.
2. low-voltage customer distribution line aging monitoring method according to claim 1, which is characterized in that user's distribution line
Impedance value include following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculation formula is such as
Under:
Wherein, Vji+1And Iji+1Freeze the voltage value at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
And current value, VjiAnd IjiFreeze the voltage value and electricity at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
Flow valuve, j=1,2 ..., M, i=1,2 ..., N-1, M be system intelligent electric meter sum, N be call together measure intelligent electric meter electricity
The number of the chill point of pressure value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number m for the impedance value that numerical value is negative value；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth with it is described
The quotient of number m obtains the average value of impedance value, which is exactly the required corresponding user's distribution wire of j-th of intelligent electric meter
The impedance value on road.
3. a kind of low-voltage customer distribution line ageing monitoring system, including a kind of control module, the control module includes storage
Device, processor and storage are in the memory and the computer program that can run on the processor, which is characterized in that
The control process that the processor is realized when executing the computer program includes:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) compare the impedance value acquired and setting impedance threshold, if the impedance value acquired is more than or equal to the setting impedance
Threshold value then determines the corresponding user's distribution line aging of the intelligent electric meter.
4. a kind of low-voltage distribution system, including system main website, distribution line and intelligent electric meter corresponding with each user, the system
Main website and each intelligent electric meter communication connection, which is characterized in that the system main website acquires each according to the calculating time interval of setting
The voltage value and current value of intelligent electric meter, and according to the voltage value of acquisition and the corresponding use of the corresponding intelligent electric meter of current value calculating
The impedance value of family distribution line；Then, compare the impedance value that acquires and setting impedance threshold, if the impedance value acquired be greater than or
Equal to the setting impedance threshold, then the corresponding user's distribution line aging of corresponding intelligent electric meter is determined.
5. low-voltage distribution system according to claim 4, which is characterized in that the impedance value of user's distribution line includes following
Calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculation formula is such as
Under:
Wherein, Vji+1And Iji+1Freeze the voltage value at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
And current value, VjiAnd IjiFreeze the voltage value and electricity at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
Flow valuve, j=1,2 ..., M, i=1,2 ..., N-1, M be system intelligent electric meter sum, N be call together measure intelligent electric meter electricity
The number of the chill point of pressure value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number m for the impedance value that numerical value is negative value；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth with it is described
The quotient of number m obtains the average value of impedance value, which is exactly the required corresponding user's distribution wire of j-th of intelligent electric meter
The impedance value on road.
The monitoring method 6. a kind of low-voltage customer distribution line is opposed electricity-stealing, which comprises the following steps:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) if the impedance value acquired persistently increases in a set period of time, determine that the corresponding user of the intelligent electric meter exists
Stealing suspicion.
The monitoring method 7. low-voltage customer distribution line according to claim 6 is opposed electricity-stealing, which is characterized in that user's distribution wire
The impedance value on road includes following calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculation formula is such as
Under:
Wherein, Vji+1And Iji+1Freeze the voltage value at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
And current value, VjiAnd IjiFreeze the voltage value and electricity at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
Flow valuve, j=1,2 ..., M, i=1,2 ..., N-1, M be system intelligent electric meter sum, N be call together measure intelligent electric meter electricity
The number of the chill point of pressure value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number m for the impedance value that numerical value is negative value；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth with it is described
The quotient of number m obtains the average value of impedance value, which is exactly the required corresponding user's distribution wire of j-th of intelligent electric meter
The impedance value on road.
Monitoring system, including a kind of control module 8. a kind of low-voltage customer distribution line is opposed electricity-stealing, the control module include depositing
Reservoir, processor and storage are in the memory and the computer program that can run on the processor, feature exist
In the control process that the processor is realized when executing the computer program includes:
(1) according to the calculating time interval of setting, the voltage value and electric current Value Data of some intelligent electric meter are acquired；
(2) impedance value of the corresponding user's distribution line of the intelligent electric meter is calculated according to the voltage value of acquisition and current value；
(3) if the impedance value acquired persistently increases in a set period of time, determine that the corresponding user of the intelligent electric meter exists
Stealing suspicion.
9. a kind of low-voltage distribution system, including system main website, distribution line and intelligent electric meter corresponding with each user, the system
Main website and each intelligent electric meter communication connection, which is characterized in that the system main website acquires each according to the calculating time interval of setting
The voltage value and current value of intelligent electric meter, and according to the voltage value of acquisition and the corresponding use of the corresponding intelligent electric meter of current value calculating
The impedance value of family distribution line；Then, if the impedance value acquired persistently increases in a set period of time, then determine the intelligence
There are stealing suspicion by the corresponding user of energy ammeter.
10. low-voltage distribution system according to claim 9, which is characterized in that the impedance value of user's distribution line include with
Lower calculating process:
1) i-th of the corresponding user's distribution line of j-th of intelligent electric meter of calculating freezes the impedance value Z at momentji, calculation formula is such as
Under:
Wherein, Vji+1And Iji+1Freeze the voltage value at moment for the i+1 of the corresponding user's distribution line of j-th of intelligent electric meter
And current value, VjiAnd IjiFreeze the voltage value and electricity at moment i-th for the corresponding user's distribution line of j-th of intelligent electric meter
Flow valuve, j=1,2 ..., M, i=1,2 ..., N-1, M be system intelligent electric meter sum, N be call together measure intelligent electric meter electricity
The number of the chill point of pressure value and current value；
2) numerical value is the impedance value of negative value in the impedance value that record obtains, and obtains the number m for the impedance value that numerical value is negative value；
3) be added after negating the impedance value that all numerical value is negative value, obtain one and value, and calculate it is described and be worth with it is described
The quotient of number m obtains the average value of impedance value, which is exactly the required corresponding user's distribution wire of j-th of intelligent electric meter
The impedance value on road.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568265A (en) * | 2019-10-17 | 2019-12-13 | 江苏远致能源科技有限公司 | Impedance identification method and system based on low-voltage distribution network |
| CN111208351A (en) * | 2020-01-17 | 2020-05-29 | 北京市腾河电子技术有限公司 | Method for calculating power supply line impedance based on load jump and storage medium |
| CN112305287A (en) * | 2020-11-10 | 2021-02-02 | 许继集团有限公司 | Anti-electricity-stealing management system and anti-electricity-stealing management method arranged at end tail of concentrator |
| CN112565344A (en) * | 2020-11-13 | 2021-03-26 | 珠海格力电器股份有限公司 | Energy Internet line monitoring method, device, equipment and system |
| CN112684403A (en) * | 2020-12-08 | 2021-04-20 | 国网四川省电力公司 | Fault detection method of intelligent electric meter based on data detection |
| CN112763842A (en) * | 2020-12-21 | 2021-05-07 | 西安交通大学 | Cable local aging degree judging method and device based on impedance spectrum |
| CN112904130A (en) * | 2021-01-28 | 2021-06-04 | 广东电网有限责任公司 | Online monitoring method, device, equipment, medium and system for line aging |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963457A (en) * | 1994-03-18 | 1999-10-05 | Hitachi, Ltd. | Electrical power distribution monitoring system and method |
| CN2660542Y (en) * | 2003-10-30 | 2004-12-01 | 杨泽林 | Non-contact U-shape loop electricity fraudulent detector for watt-hour meter |
| CN103035089A (en) * | 2012-12-29 | 2013-04-10 | 邸弋 | Unmanned battery jar theft alarm of backup power source |
| CN103972989A (en) * | 2014-05-29 | 2014-08-06 | 昌华电气设备集团有限公司 | Intelligent low-voltage switch cabinet comprehensive monitoring system based on optical-fiber communication |
| CN103972889A (en) * | 2014-05-23 | 2014-08-06 | 国家电网公司 | Distribution line impedance online identification method |
| CN106525122A (en) * | 2016-11-02 | 2017-03-22 | 天津市鸿远电气股份有限公司 | Electricity safety inspection method |
| CN107798473A (en) * | 2017-10-24 | 2018-03-13 | 福建省电力勘测设计院 | A kind of Demand-side running state analysis alarm method based on intelligent electric meter |
-
2018
- 2018-08-13 CN CN201810918461.5A patent/CN109374995B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963457A (en) * | 1994-03-18 | 1999-10-05 | Hitachi, Ltd. | Electrical power distribution monitoring system and method |
| CN2660542Y (en) * | 2003-10-30 | 2004-12-01 | 杨泽林 | Non-contact U-shape loop electricity fraudulent detector for watt-hour meter |
| CN103035089A (en) * | 2012-12-29 | 2013-04-10 | 邸弋 | Unmanned battery jar theft alarm of backup power source |
| CN103972889A (en) * | 2014-05-23 | 2014-08-06 | 国家电网公司 | Distribution line impedance online identification method |
| CN103972989A (en) * | 2014-05-29 | 2014-08-06 | 昌华电气设备集团有限公司 | Intelligent low-voltage switch cabinet comprehensive monitoring system based on optical-fiber communication |
| CN106525122A (en) * | 2016-11-02 | 2017-03-22 | 天津市鸿远电气股份有限公司 | Electricity safety inspection method |
| CN107798473A (en) * | 2017-10-24 | 2018-03-13 | 福建省电力勘测设计院 | A kind of Demand-side running state analysis alarm method based on intelligent electric meter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568265A (en) * | 2019-10-17 | 2019-12-13 | 江苏远致能源科技有限公司 | Impedance identification method and system based on low-voltage distribution network |
| CN111208351A (en) * | 2020-01-17 | 2020-05-29 | 北京市腾河电子技术有限公司 | Method for calculating power supply line impedance based on load jump and storage medium |
| CN112305287A (en) * | 2020-11-10 | 2021-02-02 | 许继集团有限公司 | Anti-electricity-stealing management system and anti-electricity-stealing management method arranged at end tail of concentrator |
| CN112565344A (en) * | 2020-11-13 | 2021-03-26 | 珠海格力电器股份有限公司 | Energy Internet line monitoring method, device, equipment and system |
| CN112684403A (en) * | 2020-12-08 | 2021-04-20 | 国网四川省电力公司 | Fault detection method of intelligent electric meter based on data detection |
| CN112763842A (en) * | 2020-12-21 | 2021-05-07 | 西安交通大学 | Cable local aging degree judging method and device based on impedance spectrum |
| CN112904130A (en) * | 2021-01-28 | 2021-06-04 | 广东电网有限责任公司 | Online monitoring method, device, equipment, medium and system for line aging |
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