CN105371984A - Bus temperature monitoring system - Google Patents

Abstract

The invention relates to a bus temperature monitoring system comprising a temperature detection and transmission module, a receiving module, an in-situ display module, a power supply module and a host computer. The temperature detection and transmission module is used for acquiring the temperature of a bus and then transmitting the acquired temperature of the bus to the receiving module. The receiving module is used for receiving the temperature of the bus and then transmitting the temperature of the bus to the host computer via an RS 485 bus for processing the temperature of the bus. The in-situ display module is used for displaying the temperature of the node of a three-phase busbar. The in-situ display module is in communication with the temperature detection and transmission module in the wireless radio frequency (RF) manner and is in communication with the remote host computer via the RS 485 bus. The power supply module is used for supplying electric energy to the temperature detection and transmission module, the receiving module and the in-situ display module. The host of the host computer records and displays the temperature of the contact of each bus for each switch cabinet in real time. According to the invention, the acousto-optical warning and the alarm processing can be automatically realized through setting warning and alarming temperature thresholds. By means of the bus temperature monitoring system, the temperature variation of a bus can be accurately monitored in real time.

Description

A bus temperature monitoring system

technical field

The invention relates to the field of electric power monitoring, in particular to a bus temperature monitoring system.

Background technique

The safe and stable operation of the power system is the fundamental goal of power system control and an important guarantee for power market transactions. With the development of modern power systems towards high voltage, large units and large capacity, the requirements for power supply reliability of power systems are getting higher and higher. Among them, the safe operation of electrical equipment itself is an important factor affecting the safe operation of the power system. Most of the electrical equipment adopts a closed structure, which has poor heat dissipation and is at high voltage for a long time. It often operates under high current and full load conditions. If effective monitoring measures are not taken for temperature rise, the safe operation of electrical equipment will be endangered, especially when a short-circuit fault occurs in the power system, the strong current will aggravate the internal temperature rise of the electrical equipment, severely damage the electrical insulation, and cause electrical The life of the equipment is shortened, and even serious accidents in which the electrical equipment is burned are caused. According to statistics, a considerable part of the accidents in the power system is related to overheating. Therefore, the online monitoring of electrical equipment temperature has become an urgent practical problem for the safe operation of electrical equipment in the power system, and it is an urgent need to improve the reliability of electrical equipment. It is of great significance to ensure the safe and stable operation of the power system.

The bus bar is the intermediate link of the electrical main wiring, which plays the role of collecting and distributing electric energy. Phase-to-phase short circuit, poor heat dissipation environment and other reasons cause the temperature to rise. If it is not found and dealt with in time, it may lead to a safety accident. Considering the long-term safe operation requirements, the temperature of the high-voltage busbar should be limited within a certain range.

Therefore, it is quite necessary to carry out real-time data collection, analysis and monitoring of busbar temperature in the operating system, and timely judge the fault point for accident warning, alarm and related processing to prevent accidents. However, due to the wide distribution of transmission lines, the large number and the distance from the ground, the manual operation of monitoring the temperature of the wires is heavy and difficult to operate, and real-time monitoring cannot be achieved.

Contents of the invention

In order to solve the problem of insulation aging or even breakdown caused by heating of the busbar, thereby causing a short circuit, causing major accidents and economic losses, the present invention provides a busbar temperature monitoring system, including: a temperature detection and transmission module, a receiving module, an on-site display module, Power supply module and upper computer; temperature detection and transmission module is responsible for collecting the bus temperature and transmitting the collected data to the receiving module, the receiving module is responsible for receiving temperature data and sending the data to the upper computer through the RS485 bus for processing, and the local display module is responsible for It can display the temperature of three-phase busbar nodes, communicate with the temperature detection and transmission module through wireless radio frequency, and communicate with the remote host computer through RS485 bus. The power module provides temperature detection and transmission module, receiving module and local display module. Electric energy, the upper computer host records and displays the temperature of each bus contact of each switch cabinet in real time, and can realize automatic sound and light early warning and alarm processing by setting early warning and alarm temperature thresholds.

In the bus temperature monitoring system, the temperature detection and transmission module includes a temperature sensor and a wireless transmission module, the temperature sensor is installed at the node of the busbar, and the number of probes is set to 4, and it is typically installed at the node of the busbar At the temperature measurement point, the busbar node temperature is measured online, and the maximum value of the monitoring data is set as the representative data of each temperature measurement sensor.

The busbar temperature monitoring system described above has an on-site display module installed in the low-voltage room of the switchgear, adopts a capacitive touch screen, can display the temperature of three-phase busbar nodes, and can also set the working mode of the temperature sensor and temperature monitoring through the screen menu The display mode of the host computer is called to analyze and display the historical data of the host computer.

The invention provides a bus temperature monitoring system. When the bus node temperature is abnormal, the temperature measurement sensor collects temperature data and transmits the data through a wireless transmission module, and the receiving module is responsible for data receiving and forwarding. Through the screen, you can view the temperature monitoring results, call the historical data stored in the host computer for a certain period of time, and set the working mode of the temperature sensor. The upper computer host records temperature data in real time, and realizes automatic sound and light early warning and alarm processing by setting early warning and alarm temperature thresholds. The staff can understand the fault situation in detail and accurately, and realize the real-time monitoring of the bus temperature.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments of the specification.

The embodiment of the present invention provides a bus temperature monitoring system, which can effectively monitor the change of the bus temperature. As shown in Figure 1, it includes: temperature detection and transmission module, receiving module, local display module, power supply module and host computer; the temperature detection and transmission module is responsible for collecting bus temperature and transmitting the collected data to the receiving module, and the receiving module is responsible for Receive the temperature data and send the data to the upper computer through the RS485 bus for processing. The local display module is responsible for displaying the temperature of the three-phase busbar nodes on the spot, communicates with the temperature detection and transmission module through wireless radio frequency, and communicates with the remote terminal through the RS485 bus. The upper computer communicates, and the power module provides power for the temperature detection and transmission module, the receiving module and the local display module. The upper computer host records and displays the temperature of each bus contact of each switch cabinet in real time. Threshold, realize automatic sound and light early warning and alarm processing.

One temperature measuring probe cannot fully and accurately measure the temperature of the busbar node. For this reason, the number of probes of the temperature measuring sensor is set to 4 and installed at representative temperature measuring points of the busbar node. Considering that the increase in the number of temperature measuring probes will increase the burden of data transmission and processing, the temperature values of the four temperature measuring probes are sequentially read during the monitoring process, and the maximum value is taken after comparison and sent to the receiving module wirelessly. The busbar temperature sensor is measured by an advanced digital temperature sensor. Since the temperature change is not a sudden change process, the temperature sensor does not need to be in the working state all the time. The busbar temperature sensor is in a dormant state most of the time. It is woken up regularly by the internal timer and exits dormancy. status, temperature acquisition, and wireless data communication with the local display device after completing a temperature acquisition.

The bus temperature monitoring system described above has an on-site display module installed in the low-voltage room of the switchgear, adopts a capacitive touch screen, can display the temperature of three-phase busbar nodes, set the display mode, and can also set the temperature sensor through the screen menu. In the working mode, by setting the conditions of the dormant state, and then adjusting the internal timer, the data acquisition mode of the temperature sensor is controlled. In addition, the historical data of the upper computer can also be retrieved through the screen for analysis and display.

The upper computer host records temperature data in real time, and realizes automatic sound and light early warning and alarm processing by setting early warning and alarm temperature thresholds. The staff can understand the fault situation in detail and accurately, and realize the real-time monitoring of the bus temperature. When the temperature of the bus node is abnormal, the temperature sensor collects the temperature data and transmits the data through the wireless transmission module. The receiving module is responsible for the receiving and forwarding of the data, and the result is displayed on the touch screen. The temperature measurement data is stored in the host computer, and the data can be read through the screen menu of the local display module, or the temperature data can be analyzed in the host computer, and the alarm signal is sent by the host computer.

The above-listed preferred embodiments have further described the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.

Claims (3)

1. a bus temperature monitoring system, is characterized in that, comprising: temperature detection and transport module, receiver module, on the spot display module, power module and host computer, temperature detection and transport module are responsible for gathering bus temperature and the data of collection are transferred to receiver module, receiver module is responsible for receiving temperature data and data being sent to host computer by RS485 bus processing, display module is responsible for showing three-phase bus bar node temperature on the spot on the spot, communicated with transport module with temperature detection by wireless radio frequency mode, communicated with far-end host computer by RS485 bus, power module is temperature detection and transport module, receiver module and on the spot display module provide electric energy, host computer main frame real time record also shows the temperature of each bus contact of each switch cubicle, by arranging early warning, alarm temperature threshold value, realize automatic acousto-optic early warning and alert process.

2. a kind of bus temperature monitoring system according to claim 1, it is characterized in that, temperature detection and transport module comprise temperature sensor and wireless transport module, temperature sensor is arranged on busbar node location, probe number is set to 4, be arranged on the point for measuring temperature place that busbar node is representative, on-line measurement busbar node temperature, the representative data of maximal value as each temperature probe of Monitoring Data is got in setting.

3. a kind of bus temperature monitoring system according to claim 1, it is characterized in that, display module is arranged on switch cubicle low-pressure chamber on the spot, adopt capacitance touch screen, three-phase bus bar node temperature can be shown, can also pass through the working method of on-screen menu design temperature sensor and the display mode of temperature monitoring, the historical data transferring host computer is carried out analyzing and shows.