阅读说明：本技术 基于色谱仪的变压器气瓶压力监测方法和系统 (Method and system for monitoring pressure of transformer gas cylinder based on chromatograph ) 是由 邹莎 于 2020-11-26 设计创作，主要内容包括：本发明公开了基于色谱仪的变压器气瓶压力监测方法和系统,涉及变压器监测技术,解决了气瓶中无可供色谱仪消耗的气体,将影响变压器运作的问题。本发明包括中控模块判断气体含量走势,中控模块控制色谱仪的供电模块的功率,提高色谱仪运行功率,中控模块监测c1、c2的连续执行次数n1,n2,当n1≥n或n2≥n时,中控模块报警。本发明实现自动对变压器气瓶中的气压监测并在预设周期内进行调节,当超出调节阈值时自动报警。(The invention discloses a method and a system for monitoring the pressure of a transformer gas cylinder based on a chromatograph, relates to the technology of transformer monitoring, and solves the problem that the operation of a transformer is influenced because no gas which can be consumed by the chromatograph exists in the gas cylinder. The method comprises the steps that a central control module judges the trend of gas content, the central control module controls the power of a power supply module of the chromatograph, the operating power of the chromatograph is improved, the central control module monitors the continuous execution times n1 and n2 of c1 and c2, and when n1 is larger than or equal to n or n2 is larger than or equal to n, the central control module gives an alarm. The invention realizes automatic monitoring of the air pressure in the transformer air bottle and adjustment in a preset period, and automatically alarms when the air pressure exceeds an adjustment threshold value.)

1. The method for monitoring the pressure of the transformer gas cylinder based on the chromatograph is characterized by comprising the following steps of:

a, a PLC module calculates and records the gas content in a transformer gas cylinder monitored by a chromatograph;

b, the central control module judges the trend of the gas content by analyzing the data of the PLC module;

c, executing c1 when the average change speed of the gas content is a positive value in the judgment result obtained by the central control module;

c2 is executed when the average rate of change of the gas content is negative;

c1, the central control module controls the power of a power supply module of the chromatograph, improves the operating power of the chromatograph by 5-10%, and executes c in the next time period of receiving the PLC module;

c2, the central control module controls the power of a power supply module of the chromatograph, reduces the operating power of the chromatograph by 5% -10%, and executes c in the next time period of receiving the PLC module;

d, the central control module monitors the continuous execution times of c1 and c2 to be n1 and n2 respectively;

wherein the number of consecutive executions n1 of c1, the number of consecutive executions n2 of c 2;

when n1 is more than or equal to n, the central control module gives an alarm;

and when n2 is more than or equal to n, the central control module gives an alarm.

2. The chromatograph-based transformer gas cylinder pressure monitoring method of claim 1, wherein n ranges from 5 to 8 times.

3. The chromatograph-based transformer gas cylinder pressure monitoring method of claim 1, further comprising a gas pressure gauge for collecting gas cylinder gas pressure data, wherein the PLC calls the gas pressure gauge data.

4. The chromatograph-based pressure monitoring method for the transformer gas cylinder according to claim 3, wherein the barometer is a passive contact barometer and comprises a high-voltage contact and a low-voltage contact, and the high-voltage contact and the low-voltage contact are respectively connected with an independent alarm module;

when the instantaneous air pressure change rate of the barometer in a sampling period monitored by the central control module exceeds the high-voltage contact, the alarm module communicated with the high-voltage contact gives an alarm;

and when the instantaneous air pressure change rate of the barometer in a sampling period monitored by the central control module is lower than that of the low-voltage contact, the alarm module communicated with the low-voltage contact gives an alarm.

5. The chromatograph-based transformer gas cylinder pressure monitoring method of claim 4, wherein the sampling period is a time period of a PLC module sampling barometer.

6. The chromatograph-based pressure monitoring method for the transformer gas cylinder according to claim 5, wherein the central control module further comprises a clock, the clock is used for controlling and monitoring the time period of the PLC sending data and the time period of the central control module receiving the PLC data, and the clock is also used for adjusting and unifying the sampling period of the PLC and the time period of the PLC sending data.

7. A chromatograph-based transformer cylinder pressure monitoring system, characterized in that the system is used for applying the method of any one of claims 1 to 6, and comprises a central control module, a barometer, a PLC module, a chromatograph and a power supply module;

the barometer, the PLC module and the central control module are sequentially connected, the barometer samples air pressure data of the chromatograph, the power supply module is used for supplying power to the chromatograph, and the barometer is a passive contact type barometer.

Technical Field

The invention relates to a transformer monitoring technology, in particular to a method and a system for monitoring the pressure of a transformer gas cylinder based on a chromatograph.

Background

The chromatograph can monitor the content of the dissolved gas in the transformer gas cylinder in real time, and a patrol inspector observes the gas amount estimated gas pressure in the gas cylinder and informs a maintenance worker to replace the gas cylinder if the gas pressure is lower than a preset scale;

the untimely inspection or inaccurate observation leads to no gas in the gas cylinder to be consumed by the chromatograph, thus leading the chromatograph to stop and influencing the operation of the transformer.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the invention provides a method and a system for monitoring the pressure of a gas cylinder of a transformer based on a chromatograph, which solve the problems that the operation of the transformer is influenced because the gas consumed by the chromatograph is not available in the gas cylinder due to untimely inspection or inaccurate observation.

The invention is realized by the following technical scheme:

the method for monitoring the pressure of the transformer gas cylinder based on the chromatograph comprises the following steps:

a, a PLC module calculates and records the gas content in a transformer gas cylinder monitored by a chromatograph;

b, the central control module judges the trend of the gas content by analyzing the data of the PLC module;

c, executing c1 when the average change speed of the gas content is a positive value in the judgment result obtained by the central control module;

c2 is executed when the average rate of change of the gas content is negative;

c1, the central control module controls the power of a power supply module of the chromatograph, improves the operating power of the chromatograph by 5-10%, and executes c in the next time period of receiving the PLC module;

c2, the central control module controls the power of a power supply module of the chromatograph, reduces the operating power of the chromatograph by 5% -10%, and executes c in the next time period of receiving the PLC module;

d, the central control module monitors the continuous execution times of c1 and c2 to be n1 and n2 respectively;

wherein the number of consecutive executions n1 of c1, the number of consecutive executions n2 of c 2;

when n1 is more than or equal to n, the central control module gives an alarm;

and when n2 is more than or equal to n, the central control module gives an alarm.

Furthermore, the value range of n is 5-8 times.

Further, the gas cylinder pressure monitoring device further comprises a gas pressure meter for collecting gas cylinder pressure data, and the PLC calls the data of the gas pressure meter.

Furthermore, the barometer is a passive contact type barometer and comprises a high-voltage contact and a low-voltage contact, and the high-voltage contact and the low-voltage contact are respectively connected with an independent alarm module;

when the instantaneous air pressure change rate of the barometer in a sampling period monitored by the central control module exceeds the high-voltage contact, the alarm module communicated with the high-voltage contact gives an alarm;

and when the instantaneous air pressure change rate of the barometer in a sampling period monitored by the central control module is lower than that of the low-voltage contact, the alarm module communicated with the low-voltage contact gives an alarm.

Further, the sampling period is the time period of the sampling barometer of the PLC module.

Furthermore, the central control module also comprises a clock, the clock is used for controlling and monitoring the time period of the PLC for sending data and the time period of the central control module for receiving the PLC data, and meanwhile, the clock is also used for adjusting and unifying the sampling period of the PLC and the time period of the PLC for sending data.

The system is characterized by being used for applying the method and comprising a central control module, a barometer, a PLC module, a chromatograph and a power supply module;

the barometer, the PLC module and the central control module are sequentially connected, the barometer samples air pressure data of the chromatograph, the power supply module is used for supplying power to the chromatograph, and the barometer is a passive contact type barometer.

Preferably, the alarm module is powered by a 5V-1A direct current adapter power supply, and the alarm module can be used for setting a plurality of telephone numbers of current maintenance personnel.

The sampling period, the time period, the low-voltage contact and the high-voltage contact can be used for manually loading data corresponding to the model of the transformer and the equipment condition record through the central control module.

The invention has the following advantages and beneficial effects:

the invention realizes automatic monitoring of the air pressure in the transformer air bottle and adjustment in a preset period, and automatically alarms when the air pressure exceeds an adjustment threshold value.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a flow chart of the present invention.

Detailed Description

Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive changes, are within the scope of the present invention.

The method for monitoring the pressure of the transformer gas cylinder based on the chromatograph, as shown in figure 1, comprises the following steps:

a, a PLC module calculates and records the gas content in a transformer gas cylinder monitored by a chromatograph;

b, the central control module judges the trend of the gas content by analyzing the data of the PLC module;

c, executing c1 when the average change speed of the gas content is a positive value in the judgment result obtained by the central control module;

c2 is executed when the average rate of change of the gas content is negative;

c1, the central control module controls the power of a power supply module of the chromatograph, improves the operating power of the chromatograph by 5-10%, and executes c in the next time period of receiving the PLC module;

c2, the central control module controls the power of a power supply module of the chromatograph, reduces the operating power of the chromatograph by 5% -10%, and executes c in the next time period of receiving the PLC module;

d, the central control module monitors the continuous execution times of c1 and c2 to be n1 and n2 respectively;

wherein the number of consecutive executions n1 of c1, the number of consecutive executions n2 of c 2;

when n1 is more than or equal to n, the central control module gives an alarm;

and when n2 is more than or equal to n, the central control module gives an alarm.

Furthermore, the value range of n is 5-8 times.

Further, the gas cylinder pressure monitoring device further comprises a gas pressure meter for collecting gas cylinder pressure data, and the PLC calls the data of the gas pressure meter.

Furthermore, the barometer is a passive contact type barometer and comprises a high-voltage contact and a low-voltage contact, and the high-voltage contact and the low-voltage contact are respectively connected with an independent alarm module;

when the instantaneous air pressure change rate of the barometer in a sampling period monitored by the central control module exceeds the high-voltage contact, the alarm module communicated with the high-voltage contact gives an alarm;

and when the instantaneous air pressure change rate of the barometer in a sampling period monitored by the central control module is lower than that of the low-voltage contact, the alarm module communicated with the low-voltage contact gives an alarm.

Further, the sampling period is the time period of the sampling barometer of the PLC module.

Furthermore, the central control module also comprises a clock, the clock is used for controlling and monitoring the time period of the PLC for sending data and the time period of the central control module for receiving the PLC data, and meanwhile, the clock is also used for adjusting and unifying the sampling period of the PLC and the time period of the PLC for sending data.

The system is characterized by being used for applying the method and comprising a central control module, a barometer, a PLC module, a chromatograph and a power supply module;

the barometer, the PLC module and the central control module are sequentially connected, the barometer samples air pressure data of the chromatograph, the power supply module is used for supplying power to the chromatograph, and the barometer is a passive contact type barometer.

Preferably, the alarm module is powered by a 5V-1A direct current adapter power supply, and the alarm module can be used for setting a plurality of telephone numbers of current maintenance personnel.

The sampling period, the time period, the low-voltage contact and the high-voltage contact can be used for manually loading data corresponding to the model of the transformer and the equipment condition record through the central control module.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.