Intelligent pluggable circuit breaker and monitoring and pre-warning system thereof

An early warning system and pluggable technology, applied in the field of intelligent pluggable circuit breakers and their intelligent monitoring and early warning systems, intelligent pluggable circuit breakers and their monitoring and early warning systems, can solve the problem of overheating of pluggable contacts, lack of intelligent It can improve the accuracy, low cost, and easy to achieve in production and transformation.

Inactive Publication Date: 2015-05-06
HARBIN UNIV OF SCI & TECH +1
14 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

At present, there is no intelligent plug-in circuit breaker system
[0005] In addition, in terms of safety in use, because the circuit breaker passes a large load current for a long time, the plug-in contacts are prone to overheating, and the contact parts of the contacts are affected by thermal oxidation or mechanical deformation, forming a vicious circle, resulting in contact failures. Problems such as overheating and burning occur from time to time. At present, the protection of the power system is aimed at the ...
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Abstract

The invention provides an intelligent pluggable circuit breaker and a monitoring and pre-warning system of the intelligent pluggable circuit breaker. The monitoring and pre-warning system is composed of the pluggable circuit breaker, a monitoring and pre-warning device, a portable terminal and a monitoring central server. The monitoring and pre-warning device comprises a measurement and control module, a temperature collection module, a voltage and current collection module, a communication module, a display module and an audible and visual alarm module. Pre-warning is achieved by measuring the temperature of all contacts in real time, measuring and calculating various electric parameters and comprehensively analyzing and judging the working state especially the unhealthy or abnormal state of the pluggable circuit breaker. In addition, the temperature warning function and the temperature protection function are achieved. The pluggable circuit and the monitoring and pre-warning device are highly integrated, the structure is simple, installation is convenient, safety and reliability are achieved, the intelligent running of the pluggable break circuit is achieved, the real-time running monitoring and production management of the field are facilitated, the low cost, production and refitting can be easily achieved, the fault rate and the damage rate of devices are effectively decreased, and the power supply reliability is improved.

Application Domain

Technology Topic

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  • Intelligent pluggable circuit breaker and monitoring and pre-warning system thereof
  • Intelligent pluggable circuit breaker and monitoring and pre-warning system thereof

Examples

  • Experimental program(1)

Example Embodiment

[0029] Such as figure 1 As shown, the intelligent plug-in circuit breaker and its monitoring and early warning system are composed of a plug-in circuit breaker (1), a monitoring and early warning device (2), a portable terminal (3) and a monitoring center server (4). Plug-in circuit breaker (1) includes housing (101), panel (102), contacts (103), terminals (104), trip unit (105), rotary switch (106), monitoring and early warning device (2) Including measurement and control module (201), temperature acquisition module (202), voltage and current acquisition module (203), communication module (204), power supply module (205), installed in the housing (101), and also includes a display module (206) The sound and light alarm module (207) is installed outside the housing (101).
[0030] figure 2 , The display module (206) and the sound and light alarm module (207) are installed on the front panel (102) of the shell (101) of the plug-in circuit breaker (1), which is convenient for operators to observe the alarm and early warning information and view Various data in operation.
[0031] figure 1 The temperature acquisition module (202) is installed close to the contact (103) and measures the temperature of the contact (103) of the plug-in circuit breaker (1) in real time, and sends it to the measurement and control module (201) for calculation and analysis. At the same time, the relevant data It is sent to the display module (206) to display that the sound and light alarm module (207) is driven to send a warning signal when a temperature warning is required or when the temperature warning value is exceeded.
[0032] When it is judged that the temperature action value is exceeded, the sound and light alarm module (207) is driven to send an alarm signal and the trip unit (105) is driven to disconnect the main circuit, thereby realizing direct temperature protection. After the operator observes the sound and light alarm signal, he can see the relevant data on the display module (206), know the cause of the alarm or early warning, and take relevant measures.
[0033] Since each contact (103) of the plug-in circuit breaker (1) may have different performance degradation degrees during long-term operation, it is imperfect to monitor the temperature of only a single contact (103). Thus, in figure 1 In the plug-in circuit breaker (1) adopts a three-phase four-wire system, the temperature acquisition module (202) measures the real-time temperature of each contact (103) of the plug-in circuit breaker (1), and the measurement and control module ( 201) Determine whether the temperature of each contact (103) exceeds the set temperature warning value and temperature action value. For the setting of the temperature warning value, it is mainly to remind the operator that the operating temperature of the contact (103) is too high. In order to prevent problems, it needs to be overhauled in time; and the temperature action value setting refers to the operating temperature of the contact (103) If it is too high, it may or has caused a certain degree of damage to the equipment. It is necessary to disconnect the main circuit immediately to avoid further development or expansion of the fault. Therefore, the temperature action value is higher than the temperature warning value.
[0034] At the same time, the load change will cause the current flowing through each contact (103) to change, which will cause the temperature fluctuation of the contact (103). The current measurement data of the corresponding phase of each contact (103) should be combined to eliminate After the influence of load fluctuation, judge whether the temperature of each contact (103) has a continuous rise and rapid rise in a short time. The former may be caused by the contact resistance gradually increasing after the deterioration of the contact (103), and the latter may be The contact (103) is caused by the rapid deterioration of mechanical or electrical damage, which indicates that there is a problem with the contact (103). Local and remote warnings are carried out, and operators are notified in time for maintenance to effectively avoid the occurrence of failures in advance.
[0035] figure 1 in , The voltage and current acquisition module (203) is connected to the terminal (104) to acquire the three-phase operating voltage and current data of the plug-in circuit breaker (1) in real time, and send them to the measurement and control module (201) for calculation and analysis to obtain the power and apparent Operating parameters such as power, active power, reactive power, power factor, frequency and harmonics are used as operating data for auxiliary production management; in addition, statistical analysis of the changing law of various parameters and finding abnormal conditions of parameters can evaluate the survival environment of the circuit breaker , Carrying out life estimation and failure cause analysis, also helps to monitor the operation of lines and electrical equipment. The relevant data is sent to the display module (206) for display, so that the operator can observe the operation of the circuit breaker and its line at any time, and drive the sound and light alarm module (207) to send out an early warning signal when an abnormality is found.
[0036] The monitoring and early warning device (2) exchanges local or remote data with the portable terminal (3) or the monitoring center server (4) via the communication module (204), including parameter setting, remote monitoring, and obtaining operating data for analysis.
[0037] The portable terminal (3) is generally carried by the operator. It can be locally wired to the monitoring and early warning device (2) through the interface extending from the communication module (204) to the panel (102) to read the monitoring and early warning device (2) monitoring and Real-time data and historical data obtained by calculation and analysis. It can also be designed as a wireless communication mode, and the monitoring and early warning device (2) sends alarm and early warning information to it, and remotely informs the operating personnel for timely processing.
[0038] In addition, the portable terminal (3) can also communicate with the monitoring center server (4) remotely in real time, upload data or receive work instructions, etc.
[0039] The power supply module (202) is connected to the connection terminal (104) to obtain power to supply power to the monitoring and early warning device (2).
[0040] The present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can implement the present invention in a variety of other specific modes based on the disclosure of the present invention. Therefore, whenever the design structure and ideas of the present invention are adopted, simple changes or modifications are made. The design is within the protection scope of the present invention.
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