CN106093704B - A kind of monitoring of power grid stealing user and localization method and system - Google Patents
A kind of monitoring of power grid stealing user and localization method and system Download PDFInfo
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- CN106093704B CN106093704B CN201610424104.4A CN201610424104A CN106093704B CN 106093704 B CN106093704 B CN 106093704B CN 201610424104 A CN201610424104 A CN 201610424104A CN 106093704 B CN106093704 B CN 106093704B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 title claims abstract description 13
- 230000004807 localization Effects 0.000 title claims abstract description 12
- 230000002159 abnormal effect Effects 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0038—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)
-
- 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
Abstract
The invention discloses the monitoring of power grid stealing user a kind of and localization methods, by comparing the size of the sum of current value at all load bus of power grid outgoing and the total current value for flowing into network load side, tentatively judge whether there is abnormal electrical phenomena, it is compared further according to the current error ratio of each branch with predetermined current error rate threshold value, the final position for determining stealing user.The system based on this method is also disclosed simultaneously.The present invention does not need a large amount of hardware and software investment, realizes convenient for computer.
Description
Technical field
The present invention relates to the monitorings of power grid stealing user a kind of and localization method and system, belong to electric power electrical domain.
Background technique
It is always the problem put in face of power supply enterprise that stealing problem how is efficiently solved in power grid electric management.Certain
A little units or it is personal take various methods to attempt to escape electrical energy measurement and illegal profit by fair means or foul, this electricity stealing is always
The legitimate rights and interests and interests of power supply enterprise are seriously endangered, while having upset fair for electricity consumption order, return power industry
Stable operation brings many security risks.So research and discussion Prevention Stealing Electricity Technology are significant.
Common stealing mode mainly has under-voltage method, undercurrent method, phase-shifting method, expands poor method and without table method.It proposes simultaneously corresponding
Prevention and treatment stealing technical measures, mainly have utilize metering box special, closing transformer low voltage leading-out terminal leading to metering device
Body, using lead sealing technology, improve ammeter external structure and prevent electricity stealing etc., these measures of proposition are to preventing stealing from playing
Certain containment effect, however these measures monitor in real time due to lacking, so validity is poor.And traditional stealing is used
It in family monitoring and location technology, needs to put into a large amount of hardware and software, is not easy to computer realization.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides the monitoring of power grid stealing user a kind of and localization method and it is
System.
In order to achieve the above object, the technical scheme adopted by the invention is that:
The monitoring of power grid stealing user a kind of and localization method, include the following steps,
Step 1, the total voltage and current value for flowing into network load side are obtained, each load section of power grid outgoing is obtained
Voltage and current value at point；
Step 2, by comparing the sum of current value at all load bus of power grid outgoing and inflow network load side
The size of total current value tentatively judges whether there is abnormal electrical phenomena, uses electrical phenomena if there is abnormal, then goes to step 3, such as
There is not abnormal electrical phenomena in fruit, then determines stealing user；
Step 3, topological structure of electric information is obtained, the loop-impedance matrice of power network topology is constructed；
Step 4, according to the loop-impedance matrice of power network topology and the voltage value of all load bus, each branch is obtained
Electric current calculated value；
Step 5, it is made the difference by the current measurement value and electric current calculated value of branch each in power network topology, obtains power grid and open up
The current error of each branch in flutterring；
Current measurement value is the current value at each load bus of power grid outgoing；
Step 6, the ratio of the current error of each branch and electric current calculated value in power network topology, and and predetermined current are calculated
Error rate threshold value is compared, and finally determines the position of stealing user.
If the ratio of the current error of branch and electric current calculated value is greater than predetermined current error rate threshold value, the branch is determined
Road is fault branch, and there are stealing users for branch road.
If two fault branches, there are common load bus, which is stealing user.
The monitoring of power grid stealing user a kind of and the system of localization method, including data server, electric energy total amount device
With several load bus electric energy metering devices；Line side installation electric energy total amount device is fed out in power grid, in the every of power grid outgoing
Load bus electric energy metering device, the electric energy total amount device and load bus electrical energy measurement dress are installed at one load bus
It sets and is connect with data server；
The electric energy total amount device, to measure and send the total voltage and current value of inflow network load side；
The load bus electric energy metering device, at each load bus to measure concurrent pushing electric network outgoing
Voltage and current value；
The data server includes that sequentially connected information about power obtains module, the preliminary judgment module of abnormal electricity consumption, electricity
Net topology data obtaining module, branch current computing module, branch current error calculating module and stealing user's determining module；
Information about power obtains module, to obtain the total voltage and current value that flow into network load side, obtains power grid and feeds out
Voltage and current value at each load bus of line；
The abnormal preliminary judgment module of electricity consumption, to by comparing the sum of current value at all load bus of power grid outgoing
With the size for the total current value for flowing into network load side, exception electrical phenomena is tentatively judged whether there is；
Power network topology data obtaining module, to obtain topological structure of electric information, structure when there is exception electrical phenomena
Build the loop-impedance matrice of power network topology；
Branch current computing module, to according to the loop-impedance matrice of power network topology and the voltage of all load bus
Value, obtains the electric current calculated value of each branch；
Branch current error calculating module, to the current measurement value and electric current calculated value by branch each in power network topology
It is made the difference, obtains the current error of each branch in power network topology；
Stealing user's determining module, to calculate the ratio of the current error of each branch and electric current calculated value in power network topology
Value, and be compared with predetermined current error rate threshold value, finally determine the position of stealing user.
The stealing user determining module includes,
Branch current error rate computing module, to calculate the current error and galvanometer of each branch in power network topology
The ratio of calculation value obtains the current error ratio of each branch；
Fault branch determining module, to carry out the current error ratio of each branch and predetermined current error rate threshold value
Compare, if the latter is less than the former, judges that, there are stealing user in respective branch, respective branch is determined as fault branch.
The stealing user determining module further includes stealing user's locating module, to exist jointly when two fault branches
Load bus determines that the common load bus is stealing user.
Advantageous effects of the invention: the present invention is by comparing current value at all load bus of power grid outgoing
The sum of size with the total current value for flowing into network load side, abnormal electrical phenomena is tentatively judged whether there is, further according to each
The current error ratio on road is compared with predetermined current error rate threshold value, and the final position for determining stealing user does not need
A large amount of hardware and software investment, is realized convenient for computer.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention.
Fig. 2 is the electric power networks schematic diagram for being equipped with intelligent electric meter.
Fig. 3 is the block diagram of data server in the present invention.
Fig. 4 is the topological structure schematic diagram for being practical power network.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, monitoring and the localization method of a kind of power grid stealing user, comprising the following steps:
Step 1, the total voltage and current value for flowing into network load side are obtained, each load section of power grid outgoing is obtained
Voltage and current value at point.
Step 2, by comparing the sum of current value at all load bus of power grid outgoing and inflow network load side
The size of total current value tentatively judges whether there is abnormal electrical phenomena, uses electrical phenomena if there is abnormal, then goes to step 3, such as
There is not abnormal electrical phenomena in fruit, then determines stealing user.
Step 3, topological structure of electric information is obtained, the loop-impedance matrice of power network topology is constructed.
Step 4, according to the loop-impedance matrice of power network topology and the voltage value of all load bus, each branch is obtained
Electric current calculated value.
Step 5, it is made the difference by the current measurement value and electric current calculated value of branch each in power network topology, obtains power grid and open up
The current error of each branch in flutterring；Current measurement value is the current value c at each load bus of power grid outgoing.
Step 6, the ratio of the current error of each branch and electric current calculated value in power network topology, and and predetermined current are calculated
Error rate threshold value is compared, and finally determines the position of stealing user.
If the ratio of the current error of branch and electric current calculated value is greater than predetermined current error rate threshold value, the branch is determined
Road is fault branch, and there are stealing users for branch road.If there are common load bus, the common loads for two fault branches
Node is stealing user.
The monitoring of power grid stealing user a kind of and the system of localization method, including data server, electric energy total amount device
With several load bus electric energy metering devices.Electric energy total amount device and load bus electric energy metering device are and data server
Connection.
As shown in Fig. 2, line side installation electric energy total amount device (here using total ammeter) is fed out in power grid, to measure simultaneously
Send the total voltage and current value for flowing into network load side；Load bus is installed at each load bus of power grid outgoing
Electric energy metering device (uses load ammeter) here, the electricity at each load bus to measure concurrent pushing electric network outgoing
Pressure and current value.
As shown in figure 3, data server includes that sequentially connected information about power obtains module, abnormal electricity consumption tentatively judges mould
Block, power network topology data obtaining module, branch current computing module, branch current error calculating module and stealing user determine mould
Block.
Information about power obtains module, to obtain the total voltage and current value that flow into network load side, obtains power grid and feeds out
Voltage and current value at each load bus of line.
The abnormal preliminary judgment module of electricity consumption, to by comparing the sum of current value at all load bus of power grid outgoing
With the size for the total current value for flowing into network load side, exception electrical phenomena is tentatively judged whether there is.
Power network topology data obtaining module, to obtain topological structure of electric information, structure when there is exception electrical phenomena
Build the loop-impedance matrice of power network topology.
Due in power grid electric power meet it is numerous, in order to facilitate management and be accurately positioned stealing user, can be to power grid
Each of user be numbered, since the corresponding relationship between incidence matrix and power grid user node is fairly simple, so
Power grid user is indicated using incidence matrix.
Topological structure of electric figure corresponding with Fig. 2 as shown in figure 4, due to load impedance in figure using a point come generation
Table just constitutes a circuit, it is possible to using circuit matrix come quasi- between load impedances all in this way and electric energy supply centre
Corresponding relationship between each load bus and circuit where it is really described.
This circuit matrix is one kind of topological matrix, there is m load (i.e. m circuit) and e branch (i.e. e side)
Load branch circuit incidence matrix.Corresponding branch impedance matrix can be by the sequencing and load branch of all each branch impedances
The sequence of each branch impedance is consistent in the incidence matrix of road.As can be seen from Figure 4, rule is established according to incidence matrix, is formed such as
Under the relevant incidence matrix A of topological structure of electric,
Element in matrix is 1 or -1 when joining in corresponding vertex and frontier juncture, is 0 when not being associated with.
It is more convenient in order to calculate and analyze, according to the linearly related property of matrix, the matrix that can be simplified, i.e. phase
The circuit matrix answered is Ba,
Circuit matrix BaThere is following relationship with incidence matrix A:
Ba=(A-1)T
It since power consumer is relatively more, is calculated to be further simplified, load branch circuit incidence matrix is without load
The row in the circuit of impedance scratches be formed into a loop matrix.
Side e in Fig. 41~e4Respectively correspond branch z1~z4, it is possible to obtain following corresponding loop-impedance matrice: (this
In indicated with Z)
According to the number of load, following corresponding loop-impedance matrice is obtained:
In formula,For the calculated value of load point electric current,For the exact value of measurement point voltage.
Branch current computing module, to according to the loop-impedance matrice of power network topology and the voltage of all load bus
Value, obtains the electric current calculated value of each branch.
Branch current error calculating module, to the current measurement value and electric current calculated value by branch each in power network topology
It is made the difference, obtains the current error of each branch in power network topology.
Stealing user's determining module, to calculate the ratio of the current error of each branch and electric current calculated value in power network topology
Value, and be compared with predetermined current error rate threshold value, finally determine the position of stealing user.
Stealing user's determining module includes,
Branch current error rate computing module, to calculate the current error and galvanometer of each branch in power network topology
The ratio of calculation value obtains the current error ratio of each branch；
Fault branch determining module, to carry out the current error ratio of each branch and predetermined current error rate threshold value
Compare, if the latter is less than the former, judges that, there are stealing user in respective branch, respective branch is determined as fault branch.
Stealing user's locating module determines the common load section to work as two fault branches there are common load bus
Point is stealing user.
The present invention is by comparing the sum of current value at all load bus of power grid outgoing and inflow network load side
The size of total current value tentatively judges whether there is abnormal electrical phenomena, current error ratio further according to each branch and default
Current error proportion threshold value is compared, the final position for determining stealing user；The present invention does not need in existing network simultaneously
Increase special device, it is only necessary to electric energy metering device be installed to detect flow into the total electricity information of network load side and every respectively
Information about power at one load bus, and input data server, algorithm is simple in data server, real convenient for computer
It is existing.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. the monitoring of power grid stealing user a kind of and the system of localization method, it is characterised in that: total including data server, electric energy
Metering device and several load bus electric energy metering devices；Line side installation electric energy total amount device is fed out in power grid, is presented in power grid
Load bus electric energy metering device, the electric energy total amount device and load bus electricity are installed at each load bus of outlet
Energy metering device is connect with data server；
The electric energy total amount device, to measure and send the total voltage and current value of inflow network load side；
The load bus electric energy metering device, the voltage at each load bus to measure concurrent pushing electric network outgoing
And current value；
The data server includes that sequentially connected information about power obtains module, the preliminary judgment module of abnormal electricity consumption, power grid and opens up
Flutter data obtaining module, branch current computing module, branch current error calculating module and stealing user's determining module；
Information about power obtains module, to obtain the total voltage and current value that flow into network load side, obtains power grid outgoing
Voltage and current value at each load bus；
The abnormal preliminary judgment module of electricity consumption, to by comparing the sum of current value at all load bus of power grid outgoing and stream
The size for entering the total current value of network load side tentatively judges whether there is exception electrical phenomena；
Power network topology data obtaining module, when there is exception electrical phenomena, to obtain topological structure of electric information, building electricity
The loop-impedance matrice of net topology；
Branch current computing module, to obtain according to the loop-impedance matrice of power network topology and the voltage value of all load bus
To the electric current calculated value of each branch；
Branch current error calculating module is carried out to the current measurement value by branch each in power network topology with electric current calculated value
It makes the difference, obtains the current error of each branch in power network topology；
Stealing user's determining module, to calculate the ratio of the current error of each branch and electric current calculated value in power network topology,
And be compared with predetermined current error rate threshold value, finally determine the position of stealing user.
2. the system of monitoring and localization method based on a kind of power grid stealing user described in claim 1, it is characterised in that: institute
Stating stealing user's determining module includes,
Branch current error rate computing module, to calculate the current error of each branch and electric current calculated value in power network topology
Ratio, obtain the current error ratio of each branch；
Fault branch determining module, to compare the current error ratio of each branch and predetermined current error rate threshold value
Compared with if the latter judges that, there are stealing user in respective branch, respective branch is determined as fault branch less than the former.
3. the system of monitoring and localization method based on a kind of power grid stealing user described in claim 1, it is characterised in that: institute
Stating stealing user's determining module further includes stealing user's locating module, to when two fault branches are there are common load bus,
Determine that the common load bus is stealing user.
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| CN111413594A (en) * | 2019-12-10 | 2020-07-14 | 王纪旋 | Accurate positioning method for electricity stealing |
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