CN201845048U

CN201845048U - Remote monitoring device for transformers

Info

Publication number: CN201845048U
Application number: CN2010205927656U
Authority: CN
Inventors: 林美蓉
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-05
Filing date: 2010-11-05
Publication date: 2011-05-25
Anticipated expiration: 2020-11-05

Abstract

The utility model relates to a remote monitoring device for transformers. The device comprises a voltage collecting circuit, a current collecting circuit, an analog switching circuit, an A/D converting circuit, a singlechip control circuit, as well as a GSM (global system for mobile communications) wireless receiving/emitting module, wherein signals collected by the voltage collecting circuit and the current collecting circuit are transmitted to the analog switching circuit, the output signals of the analog switching circuit are converted into data signals through the A/D converting circuit, the data signals are then transmitted to the analog switching circuit, and the analog switching circuit controls the output of the GSM wireless receiving/emitting module. The device adopts the single-phase voltage collecting circuit, the single-phase current collecting circuit, the high-precision A/D converting technology, the singlechip control technology and the anti-interference technology, and utilizes the short message technology in the field of GSM communication, so as to realize remote wireless node voltage monitoring and data transmission; and the device has the characteristics of high reliability and measuring precision, complete functions, easiness in installation, flexible background software, simplicity and convenience in operation, etc.

Description

A kind of transformator remote monitoring device

Technical field

The utility model relates to transformer monitoring device, particularly relates to a kind of transformator remote monitoring device.

Background technology

Along with the development of economic level, the user is more and more higher to the requirement of power supply quality, power supply reliability, and the installation of substation transformer is also more and more universal.How to realize the status monitoring of substation transformer, prevention is illegally controlled transformer, stealing, is stolen the generation of incidents such as transformer, guarantees Electrical Safety and electricity consumption reliability, also more and more becomes distinct issues.In power industry, realize that distributing transformer monitoring and anti-theft early-warning function are difficult problems all the time, especially in vast rural area, many substation transformers are dispersed in the field, promptly allow to send warning message, its effect that can play is limited, is difficult to play the anti-theft early-warning function.If use the mode of wire transmission to realize remote monitoring, its cost is too high, sets up the restriction that the dedicated wireless channel transmission manner is subjected to technology maturity, transmission range, maintenance cost etc. again.

The utility model content

The purpose of this utility model provides a kind of employing single-phase voltage and current acquisition circuit, utilizes the short message technology in gsm communication field, realizes the long-distance wireless monitoring of node voltage and the transformator remote monitoring device of data transmission.

The technical scheme that the utility model adopted is such: a kind of transformator remote monitoring device, comprise voltage collection circuit, current acquisition circuit, analog switching circuit, A/D change-over circuit, single chip machine controlling circuit, gsm wireless sending and receiving module, signal by voltage collection circuit and the collection of current acquisition circuit is transferred to analog switching circuit, the data-signal of the output signal of analog switching circuit after the conversion of A/D change-over circuit is delivered to analog switching circuit, analog switching circuit control output gsm wireless sending and receiving module.

Described voltage collection circuit is connected to single-phase potential transformer B1 by AC220V ac circuit voltage input end A, N, behind the output terminal shunt capacitance C1 by single-phase potential transformer B1 series diode D1, resistance in series R1, its output terminal adjustable resistance R1 in parallel, capacitor C 2, C3.

After described current acquisition circuit connects a resistance 2R1 by the output terminal of current transformer L, adjustable resistance W in parallel, electric capacity 2C1, its output terminal connects series diode 2D1, the output terminal shunt capacitance 2C2 of diode 2D1, behind the resistance in series 2R4, output terminal shunt capacitance 2C3, resistance 2R5.

The beneficial effects of the utility model are: the first, can realize the voltage of monitoring point is monitored in real time, possess the function that statistics rate of qualified voltage or electric current transfinite, by the GSM short message mode, the teletransmission data are to administrator computer.The second, have wide coverage, on-line monitoring, transmission automatically, cheap, the stable high characteristics of expense, monitor sends short message prompt to management system or designated mobile phone under the situation of incoming call, guarantee operate as normal in transformer station's electromagnetic intensity scope.

This device adopts single-phase voltage and current acquisition circuit, high-precision A/D converter technique, single-chip microcomputer control technology and Anti-Jamming Technique, utilize the short message technology in gsm communication field, realized long-distance wireless monitoring and data transmission, have the reliability height node voltage, the measuring accuracy height, multiple functional, install simple and easy, characteristics such as daemon software is flexible, easy and simple to handle.

Description of drawings

Fig. 1 is the frame assumption diagram of the utility model embodiment;

Fig. 2 is the circuit theory diagrams of the utility model embodiment.

Embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1 and Figure 2, a kind of transformator remote monitoring device, comprise voltage collection circuit 1, current acquisition circuit 2, analog switching circuit 3, A/D change-over circuit 4, single chip machine controlling circuit 5, gsm wireless sending and receiving module 6, the signal of being gathered by voltage collection circuit 1 and current acquisition circuit 2 is transferred to analog switching circuit 3, the data-signal of the output signal of analog switching circuit 3 after 4 conversions of A/D change-over circuit is delivered to analog switching circuit 3, analog switching circuit 3 control output gsm wireless sending and receiving modules 6.

Described voltage collection circuit 1 is by AC220V ac circuit voltage input end A, N is connected to single-phase potential transformer B1, behind the output terminal shunt capacitance C1 of single-phase potential transformer B1 series diode D1, resistance in series R1, its output terminal adjustable resistance R1 in parallel, capacitor C 2, C3, single-phase potential transformer B1 was with output in 100: 1, after diode D1 rectification shunt capacitance C1 filtering, resistance in series 2R1, adjust resistance 2R1 and can change the signal output that A1 is ordered, the output signal that A1 is ordered is connected to the 4th pin of analog switching circuit U4, be connected to the 2nd pin of A/D change-over circuit U2 by the 3rd pin output of analog switching circuit U4, again by the 5th of A/D change-over circuit U2,6, the outputting data signals of 7 pin is given the 36th of single chip machine controlling circuit U1,38,39 pin, composition data transfers circuit, cycling switch by single chip machine controlling circuit U1 control switching analoging switch circuit U 4, again when the A1 point has change in voltage, A/D change-over circuit U2 also exports different data-signals thereupon, U1 reads current data information by single chip machine controlling circuit, when the A1 point changes numerical value above single chip machine controlling circuit U1 inner setting value, through the computing of single chip machine controlling circuit U1 internal database, single chip machine controlling circuit U1 the 27th, 7,8,14 pin serial data transmission drive gsm wireless sending and receiving module U3 and send SMS alarm information to gsm wireless sending and receiving module U3.Wherein B2, B3 voltage transformer (VT) Acquisition Circuit principle are mutually identical with B1, no longer repeat here.

After described current acquisition circuit 2 connects a resistance 2R1 by the output terminal of current transformer L, adjustable resistance W in parallel, electric capacity 2C1, its output terminal connects series diode 2D1, the output terminal shunt capacitance 2C2 of diode 2D1, behind the resistance in series 2R4, output terminal shunt capacitance 2C3, resistance 2R5, when the phase line current is passed current transformer L load current is arranged, current transformer L out secondary output AC signal, this signal is through diode 2D1 rectification, after electric capacity 2C1 filtering etc. are handled, be sent to analog switching circuit U4 the 13rd pin, cycling switch by single chip machine controlling circuit U1 control switching analoging switch circuit U 4, when the A4 point changes numerical value above single chip machine controlling circuit U1 inner setting value, drive output single chip machine controlling circuit U1 the 27th through the computing of single chip machine controlling circuit U1 internal database, 7,8,14 pin serial data transmission drive gsm wireless sending and receiving module U3 and send SMS alarm information to gsm wireless sending and receiving module U3.

More than show and described ultimate principle of the present utility model and principal character and advantage thereof; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. transformator remote monitoring device, it is characterized in that: comprise voltage collection circuit (1), current acquisition circuit (2), analog switching circuit (3), A/D change-over circuit (4), single chip machine controlling circuit (5), gsm wireless sending and receiving module (6), the signal of being gathered by voltage collection circuit (1) and current acquisition circuit (2) is transferred to analog switching circuit (3), the data-signal of the output signal of analog switching circuit (3) after A/D change-over circuit (4) conversion is delivered to analog switching circuit (3), analog switching circuit (3) control output gsm wireless sending and receiving modules (6).

2. a kind of transformator remote monitoring device according to claim 1, it is characterized in that: described voltage collection circuit (1) is connected to single-phase potential transformer B1 by AC220V ac circuit voltage input end A, N, behind the output terminal shunt capacitance C1 of single-phase potential transformer B1 series diode D1, resistance in series R1, its output terminal adjustable resistance R1 in parallel, capacitor C 2, C3.

3. a kind of transformator remote monitoring device according to claim 1, it is characterized in that: after described current acquisition circuit (2) connects a resistance 2R1 by the output terminal of current transformer L, adjustable resistance W in parallel, electric capacity 2C1, its output terminal connects series diode 2D1, the output terminal shunt capacitance 2C2 of diode 2D1, behind the resistance in series 2R4, output terminal shunt capacitance 2C3, resistance 2R5.