CN102998420A

CN102998420A - Online monitoring device for gas in transformer oil

Info

Publication number: CN102998420A
Application number: CN2012103834275A
Authority: CN
Inventors: 郑道富
Original assignee: SUZHOU AIZHI ELECTRIC CO Ltd
Current assignee: SUZHOU AIZHI ELECTRIC CO Ltd
Priority date: 2012-10-11
Filing date: 2012-10-11
Publication date: 2013-03-27

Abstract

The invention discloses an online monitoring device for gas in transformer oil. The online monitoring device comprises a gas sensitive element, a signal processing circuit, a lower computer, a CAN (Controller Area Network) adapter card and a PC (Personal Computer), wherein the gas sensitive element is connected with the signal processing circuit and the lower computer, the lower computer is connected with the CAN adapter card through a CAN bus, and the CAN adapter card is connected with the PC. The gas sensitive element collects the components and the content of dissolved gas in the transformer oil, the insulation aging degree or fault type of a transformer is processed and calculated and can also be transmitted to the PC through the CAN bus for carrying out analytic statistics, thus the online monitoring device of gas in transformer oil has the advantages of simple design and high monitoring accuracy, and has good application prospect.

Description

On-Line Monitor Device of Gas in Oil of Transformer

Technical field

The present invention relates to a kind of On-Line Monitor Device of Gas in Oil of Transformer, belonged to the transformer technology field.

Background technology

Fast development along with electric system, transformer is most important electrical equipment in the electric system, in case in service breaking down, will cause serious consequence to electric system, because the composition of Gases Dissolved in Transformer Oil and content can reflect insulation ag(e)ing degree or fault type in the transformer to a certain extent, so be necessary the electric unusual characteristic quantity of reflection transformer is monitored, the system that does not also monitor for composition and the content of Gases Dissolved in Transformer Oil of the prior art, thereby can not be timely reflect insulation ag(e)ing degree or fault type in the current transformer to the user, need to obtain by other approach, process more complicated, and poor effect.

Summary of the invention

In order to overcome the deficiencies in the prior art, On-Line Monitor Device of Gas in Oil of Transformer provided by the invention, pass through gas sensor, gather composition and the content of the dissolved gas in the transformer oil, process insulation ag(e)ing degree or the fault type of calculating transformer, can also pass through the CAN bus, send PC to and carry out analytic statistics, simplicity of design, monitoring accuracy is high, has a good application prospect.

In order to achieve the above object, the technical solution adopted in the present invention is:

A kind of On-Line Monitor Device of Gas in Oil of Transformer, it is characterized in that: comprise gas sensor, signal conditioning circuit, slave computer, CAN adapter and PC, described gas sensor is by being connected with the signal conditioning circuit slave computer, described slave computer is connected with the CAN adapter by the CAN bus, and described CAN adapter is connected with PC.

Aforesaid On-Line Monitor Device of Gas in Oil of Transformer is characterized in that: described gas sensor, signal conditioning circuit and slave computer are many groups, and quantity is consistent.

Aforesaid On-Line Monitor Device of Gas in Oil of Transformer is characterized in that: described signal conditioning circuit comprises filtering circuit, amplifying circuit and the AD sample circuit that connects successively.

Aforesaid On-Line Monitor Device of Gas in Oil of Transformer, it is characterized in that: described every group of slave computer comprises microprocessor and CAN interface circuit, one end of described CAN interface circuit is connected with microprocessor respectively, and the other end of described CAN interface circuit is connected with the CAN bus.

Aforesaid On-Line Monitor Device of Gas in Oil of Transformer is characterized in that: described every group of slave computer also comprises power circuit, warning circuit and watchdog circuit, and described power circuit, warning circuit and watchdog circuit are connected with described microprocessor respectively.

The invention has the beneficial effects as follows:

1) the present invention gathers composition and the content of the dissolved gas in the transformer oil by gas sensor, can access insulation ag(e)ing degree or the fault type of transformer after microprocessor processes is calculated, and simplicity of design realizes that easily cost is lower;

2) by the CAN bus, send PC to and carry out analytic statistics, wherein the employing of industrial-controlled general line CAN bus has good communication speed, transmitting range is far away, reliability is high, anti-interference is high, PC can the log history data, the historical data and the current data that make things convenient for the user to inquire about at any time corresponding transformer compare, and in time find insulation ageing problem, and take treatment measures;

3) the present invention can monitor many Gas in Oil of Transformer simultaneously, improves monitoring efficient, simplicity of design, and monitoring accuracy is high, has a good application prospect.

Description of drawings

Fig. 1 is the system chart of On-Line Monitor Device of Gas in Oil of Transformer of the present invention.

Fig. 2 is the system chart of slave computer of the present invention.

Fig. 3 is the system chart of signal conditioning circuit of the present invention.

Embodiment

Below in conjunction with Figure of description, the present invention is further illustrated.

As shown in Figure 1, a kind of On-Line Monitor Device of Gas in Oil of Transformer, comprise gas sensor, signal conditioning circuit, slave computer, CAN adapter and PC, gas sensor is by being connected with the signal conditioning circuit slave computer, slave computer is connected with the CAN adapter by the CAN bus, the CAN adapter is connected with PC, PC is mainly used in data and processes, communication, real-time resume, the current transformer insulated aging conditions of real time record, gas sensor wherein, signal conditioning circuit, slave computer is many groups, quantity is consistent, as shown in Figure 3, every group of signal conditioning circuit comprises the filtering circuit that connects successively, amplifying circuit and AD sample circuit are used for the depressor oil gas signal of gas sensor collection is carried out filtering, amplify and the AD sampling, send slave computer to and carry out the data processing.

As shown in Figure 2, every group of slave computer comprises microprocessor and CAN interface circuit, and wherein an end of CAN interface circuit is connected with microprocessor respectively, and the other end of CAN interface circuit is connected with the CAN bus,

Described slave computer also comprises warning circuit, watchdog circuit and the power circuit that is connected with microprocessor, power circuit can provide working power for slave computer and signal conditioning circuit, warning circuit can be worked as the insulation ageing problem that monitors transformer when serious, send chimes of doom, the very first time is notified the user, and watchdog circuit can guarantee the normal operation of slave computer, overcome external interference, in the situation such as electrostatic interference, slave computer is restarted reset, improve the reliability of system.

The course of work of On-Line Monitor Device of Gas in Oil of Transformer of the present invention is as follows: at first the gas sensor of each transformer can be with the Gas in Oil of Transformer that gathers, send microprocessor to by signal conditioning circuit, after each data-signal that microprocessor will receive is judged processing, send PC to by CAN interface circuit and CAN bus and do further data analysis and process, the user just can be according to the demonstration on the PC, grasp at any time current or historical Transformer Insulation Aging situation, slave computer can also utilize warning circuit, in Transformer Insulation Aging is serious, surpass the police circles that set, can send alarm sound, reminding user is in time processed.

In sum, On-Line Monitor Device of Gas in Oil of Transformer of the present invention, pass through gas sensor, gather composition and the content of the dissolved gas in the transformer oil, process insulation ag(e)ing degree or the fault type of calculating transformer, can also pass through the CAN bus, send PC to and carry out analytic statistics, simplicity of design, monitoring accuracy is high, has a good application prospect.

More than show and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is by appending claims and equivalent circle thereof.

Claims

1. On-Line Monitor Device of Gas in Oil of Transformer, it is characterized in that: comprise gas sensor, signal conditioning circuit, slave computer, CAN adapter and PC, described gas sensor is by being connected with the signal conditioning circuit slave computer, described slave computer is connected with the CAN adapter by the CAN bus, and described CAN adapter is connected with PC.

2. On-Line Monitor Device of Gas in Oil of Transformer according to claim 1 is characterized in that: described gas sensor, signal conditioning circuit and slave computer are many groups, and quantity is consistent.

3. On-Line Monitor Device of Gas in Oil of Transformer according to claim 1 and 2 is characterized in that: described signal conditioning circuit comprises filtering circuit, amplifying circuit and the AD sample circuit that connects successively.

4. On-Line Monitor Device of Gas in Oil of Transformer according to claim 1, it is characterized in that: described every group of slave computer comprises microprocessor and CAN interface circuit, one end of described CAN interface circuit is connected with microprocessor respectively, and the other end of described CAN interface circuit is connected with the CAN bus.

5. according to claim 1 or 4 described On-Line Monitor Device of Gas in Oil of Transformer, it is characterized in that: described every group of slave computer also comprises power circuit, warning circuit and watchdog circuit, and described power circuit, warning circuit and watchdog circuit are connected with described microprocessor respectively.