CN2833617Y

CN2833617Y - Metering anti-theft device for electric power supply and distribution network

Info

Publication number: CN2833617Y
Application number: CNU2004200986050U
Authority: CN
Inventors: 赵斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-14
Filing date: 2004-12-14
Publication date: 2006-11-01
Anticipated expiration: 2014-12-14

Abstract

The utility model relates to a metering theft preventing device for electric power supply and distribution networks, which belongs to a theft preventing system device of electric power industry. The utility model is composed of a host machine and a plurality of branch machines, wherein the main machine and the branch machines are connected in a wireless communication mode, the host machine comprises a data receiving circuit and a data treating circuit, and each of the branch machines comprises a data collecting part and a data transferring part. A branch machine control circuit is composed of a current I/I change-over circuit, an AC/DC change-over circuit, an A/D change-over and quantification circuit, a modulation filtering circuit, a voltage sensor, a KWH meter, a switching power supply, a controlling and ID generating circuit, a clock vibrating circuit, an ROM circuit and a main control CPU single chip computer. The host machine has RF signals from an antenna array, and the RF signals pass through a high efficiency filter, a demodulator, a shaping amplification circuit, a buffer and an interface circuit in sequence to enter a computer to be treated. The computer is connected with an operation keyboard. The device management of the utility model utilizes a plurality of lines to form a network. The utility model is a theft preventing device mainly used for electric power supply and distribution networks and prevents the accidents of stealing electricity, stealing and cutting lines, etc. from happening.

Description

Power supply and distribution of electric power network measurement anti-theft device

One, technical field: the utility model belongs to a kind of burglary-resisting system device of power industry, is mainly used in the anti-theft device of power supply and distribution of electric power network system.

Two, background technology: in existing supply and distribution network, improper power loss is more, and the abnormal loss on the individual line is up to more than 30% of total electricity consumption, and unmanageable abnormal loss occurs on the circuit of the 10KV or the 6KV utmost point; Here the abnormal loss of saying mainly refers to illegal artificial robber's electric loss.Though each power supply management department takes many anti-theft measures,, many disabled users still take corresponding countermeasure, and to reach the purpose of stealing electricity, the stolen phenomenon of circuit remains incessant after repeated prohibition.

Three, summary of the invention: the purpose of this utility model provides power supply and distribution of electric power network measurement anti-theft device, solves antitheft electricity in this system, prevents that accidents such as the circuit robber cuts take place.

Its technical scheme is: power supply and distribution of electric power network measurement anti-theft device, form by a main frame and a plurality of extension set, adopt wireless communication mode to be connected between main frame and the extension set, main frame comprises that Data Receiving and treatment circuit partly form, and extension set comprises data acquisition and radiating portion composition.Described extension set control circuit produces circuit 18, clock concussion 19, ROM circuit 20 and master cpu single-chip microcomputer 21 by electric current I/I change-over circuit 11, AC/DC change-over circuit 12, A/D conversion sample circuit 13, modulated filter 14, voltage sensor 15, KWH table 16, Switching Power Supply 17, control and identification code, described main frame comprises the RF signal of antenna array 22, successively through the logical absolute filter 23 of band, detuner 24, shaping amplification circuit 25, impact damper 26, interface circuit 27, enter computing machine 30 and handle, computing machine is connected with operation keyboard.Described main frame comprises that also the signal after the machine processing as calculated is transported to alarm part 28, display part 29 and printer 31 respectively.In the data back main frame that each extension set is gathered, compare according to above-mentioned logical formula with the electric current I value of this circuit extension set after by computing machine the electric current I value summation operation of every circuit extension set subordinate's subscriber's extension station, equation then is a normal condition when setting up, otherwise be up-set condition, then send alarm signal.

Main beneficial effect of the present utility model is in the power supply and distribution of electric power network system, and the antitheft electricity of this covering device, anti-circuit are stolen and cut and the management of performance of electric-power metering all improves a class, and be safe and reliable and accurate.This cover anti-theft device is mainly used in the supply and distribution network, monitoring main line, the distribution condition of branch line circuit I and the KWH value of each user terminal.Adopt digital technology.By the digital radio transmission mode, the parameter of each monitoring point collection is transferred back to the receiving trap at management of power use center, carry out data processing by computing machine, whether the distribution of judging electric current I according to Processing Structure is reasonable, thereby whether there is the disabled user in the decision-making system, and can consults user's KWH value at any time.Save the trouble that the power supply management personnel check meter to the user place, the device management of native system is formed network rather than certain uniline or certain user by many circuits.So no matter on the line any one goes wrong, the native system device all can send warning signal.

Four, description of drawings: Fig. 1 is this device distribution schematic diagram; Fig. 2 is this device extension set circuit structure theory diagram; Fig. 3 is this device host circuit structural principle block diagram.

Five, embodiment:

Among the figure, 1, management of power use central host, 2,01# transformer station, 3,02# transformer station, 4, the circuit extension set, 5, the circuit extension set, 6,7,8,9,10 is subscriber's extension station, 11, electric current I/I conversion equipment, 12, the AC/DC conversion portion, 13, A/D changes quantification, 14, modulation/band is logical, efficiently/and filtering, 15, voltage sensor, 16, the KWH table, 17, Switching Power Supply, 18, identification code produces circuit, 19, clock oscillation, 20, ROM, 21, the CPU single-chip microcomputer, 22, antenna array, 23, the logical absolute filter of band, 24, detuner, 25, shaping amplification circuit, 26, impact damper, 27, interface circuit, 28, the alarm part, 29, the display part, 30, microsystem, 31, print 32, operation part.

With reference to accompanying drawing 1, the 001# circuit of establishing 01# transformer station has 5 users, and then measured electric current (I) value, kilowatt hour (KWH) value of circuit extension set on this circuit and subscriber's extension station must meet following logical formula (under the no stealing normal condition):

I001=i01+i02+i03+i04+i05+I leaks (I leaks and is the normal Leakage Current of circuit)

KWH001=kwh01+kwh02+kwh03+kwh04+kwh05+kwh consumes (kwh is the line loss under the normal condition)

In the data back main frame that each extension set is gathered, compare according to above-mentioned logical formula with (I) value of this circuit extension set after by computing machine (I) value summation operation of every circuit extension set subordinate's subscriber's extension station, equation then is a normal condition when setting up, otherwise is up-set condition, sends alarm signal.(KWH) value of each extension set transfers back in the main frame address storage separately, in order to output.(I) value is the data that one group of randomness changes.(KWH) be one group of accumulative total numerical value that refreshed once in per 60 minutes.

Each subscriber's extension station of every circuit extension set and subordinate thereof is formed a basic monitoring unit.

If certain circuit I line＞∑ i family+i leaks, then this circuit is a up-set condition, has disabled user (stealing user), and alarm signal appears in computing machine, informs the fulgurite operator on duty, has the people carrying out illegal operation on this circuit, should in time handle.Because of the illegal reasons such as power failure, antenna damage of opening cause certain extension set dropout, main frame also can send alarm signal.

With reference to accompanying drawing 2, circuit extension set and subscriber's extension station, both are identical on appearance structure, circuit, and just identity code is different with capacity specifications.

Extension set adopts aircraft " black box " design concept, and whole box body adopts integral structure, and the outside window that does not stay meter reading to use is only reserved a data interface socket and a strip antenna.Weld seam and screw are not stayed in whole outside.If desired when meter reading is gone at the scene, must be connected on the socket of batch meter with specialized apparatus, could on display, see the actual accumulative total numerical value of inner kwh table then.The door of metering extension set adopts electric lock device, the operation of opening-closing door also will be joined by the socket of cable with the metering extension set with specialized equipment, after carrying one group of code data, door could be opened or closed, like this, also can't restore even someone opens chamber door by force, thereby reach thief-proof purpose.

It mainly quantizes 13 logical, efficient/filtering 14 to modulation/band through CPU single-chip microcomputer 21, voltage sensor 15, KWH table 16 by electric current I/I conversion equipment 11, AC/DC conversion portion 12 and A/D conversion and is produced by Switching Power Supply 17 controls and identification code that circuit 18, clock shake 19, ROM20 forms the loop and controls the generation effects by CPU single-chip microcomputer 21.In this system and device, want to make the main control computer judgement and report out the extension set title, must on extension set, set up an identification code and produce circuit, and identification code is to be in the first preceding 16 bit codes in the sequence of data.In numerous data stream, transmission of each group data must keep certain form and order, so that computing machine is found out corresponding memory address, the finishing of this function is that the interrupt request singal that the CPU by every extension set sends is finished.

The 5A electric current of taking from mutual inductor AK1, AK2, CK1, CK2 is after the I/I conversion, the electric current that is converted to 200mA is sent into the AC/DC change-over circuit, be converted into the corresponding 0-5V direct current of input current (0-5A), after quantizing, take a sample, encoding, be converted to and the corresponding digital signal of input current, send into single-chip microcomputer then and handle, after modulation, frequency stabilization, band are logical, height is put by antenna and launched.

With reference to accompanying drawing 3, the composition of main frame: put filtering, detuner, impact damper, interface circuit and microcomputer by antenna array, height and form.

Principle of work: because the RF signal of antenna array 22, at first enter the logical height of band and put wave filter 23, after filtering clutter and the undesired signal, enter the high frequency amplifying circuit, after the RF signal is amplified to certain amplitude, send into detuner 24, with carrier wave and data stream separation, take out useful data stream and send into shaping amplification circuit 25, after pulse become effective waveform, send into impact damper 26 and microcomputer interface circuit 27 and handle, transport to microsystem 30 and handle, and be transported to alarm part 28 respectively, display part 29 prints 31 by operation 32 and prints interrelated datas.

The data processing of host computer mainly relies on corresponding software to finish.Its key step is as follows: (1) identifies each extension from data, and the following data of this number are sent into separately memory address, and reads (I) value of current circuit extension set and (I) value of each subscriber's extension station, and compares.Wherein the I leakage value in the logical formula is a correction numerical value, according to the line length difference, and the line construction difference, meteorological on-the-spot different variations to some extent are so this value is the data that can revise in software.The variation that is directly proportional with Route Length of I leakage=I line under the normal condition-Ei family=I error amount, I error amount.(2) the input Subscriber Number can access this user's power consumption parameter data, current I value kwh value, last month data such as KWH value and line number.(3) when the comparative structure of I value inequation occurs and continues more than 30 seconds, outputting alarm signal, and the geography that occurs this circuit in current demonstration moves towards figure, geographic map and line code number, prompting etc.(4) obtain corresponding instruction, print current KWH value structure, document formula inventory.(5) the accumulative total numerical value main control microcomputer of the KWH value of each extension set can't be revised.(6) the above alarm signal of two-way or two-way can appear simultaneously.(7) management easily: primary design is that 999 circuit extension sets are arranged under every main control microcomputer, and 99 subscriber's extension stations are arranged under every circuit extension set.

Claims

1, power supply and distribution of electric power network measurement anti-theft device, comprise a main frame and a plurality of extension set composition, adopt wireless communication mode to be connected between main frame and the extension set, main frame comprises that Data Receiving and treatment circuit partly form, extension set comprises data acquisition and radiating portion composition, it is characterized in that: described extension set control circuit is by electric current I/I change-over circuit (11), AC/DC change-over circuit (12), A/D changes sample circuit (13), modulated filter (14), voltage sensor (15), KWH shows (16), Switching Power Supply (17), control produces circuit (18) with identification code, clock concussion (19), ROM circuit (20) and master cpu single-chip microcomputer (21), described main frame comprises the RF signal that antenna array (22) comes, successively through the logical absolute filter (23) of band, detuner (24), shaping amplification circuit (25), impact damper (26), interface circuit (27), enter computing machine (30) and handle, computing machine is connected with operation keyboard.

2 power supply and distribution of electric power network measurement anti-theft devices according to claim 1 is characterized in that: described main frame also comprises alarm part (28), display part (29) and printer (31).