Intelligent monitoring method for distribution box

Abstract

The invention discloses an intelligent monitoring method for a distribution box. The method comprises the following steps: S1, data acquisition: respectively acquiring voltage, current and temperature data in the distribution box; s2, health index calculation: calculating a health index according to the data collected in the step S1, wherein the health index is used for evaluating the working state of the distribution box; and S3, setting an early warning threshold: based on the health index in the step S2, when the health index is lower than a certain threshold, triggering an early warning signal to remind operation and maintenance personnel to check or maintain the distribution box. According to the method, the voltage, current and temperature values of the distribution box are collected in real time, the health index and the early warning threshold value are provided, the mode possibly causing the fault is recognized according to historical data, the current monitoring state of the distribution box is concerned, more attention is paid to prevention of possible faults in the future, and the reliability and efficiency of a power system can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution box monitoring, and specifically to an intelligent monitoring method for distribution boxes. Background Technique

[0002] With the increasing improvement of people's living standards, the requirements for power quality and power supply uninterruptibility are becoming increasingly strict. As an important part of the power supply system, the monitoring of distribution boxes is becoming increasingly important. The existing monitoring of distribution boxes mainly detects current, voltage or temperature. Once the current, voltage or temperature value is abnormal, power is immediately cut off. By judging through a single measurement of current, voltage or temperature, it is impossible to identify whether it is a voltage fault, a current fault or a temperature fault. Therefore, in some special cases, a single judgment is not applicable, and it is also impossible to predict possible future faults. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects, provide an intelligent monitoring method for distribution boxes, collect the voltage, current and temperature values of the distribution box in real time, propose a health index and an early warning threshold, and identify the patterns that may lead to faults based on historical data, not only paying attention to the current monitoring status of the distribution box, but also paying more attention to the prevention of possible future faults, which helps to improve the reliability and efficiency of the power system and can effectively solve the problems in the background technique.

[0004] To achieve the above object, the present invention provides the following technical solution: An intelligent monitoring method for distribution boxes, characterized in that it includes the following steps: Step S1, data collection: Collect the voltage, current and temperature data in the distribution box respectively; Step S2, health index calculation: Calculate the health index according to the data collected in step S1 to evaluate the working state of the distribution box; The health index is expressed as: ; Wherein, 、 、 respectively represent the deviation degrees of current, temperature and voltage relative to the normal range, , , are the corresponding weight coefficients; Step S3, early warning threshold setting: Based on the health index in step S2, when it is lower than a certain threshold, an early warning signal is triggered to remind the operation and maintenance personnel to check or maintain the distribution box; The threshold is expressed as: ; Wherein, , are respectively the historical minimum and maximum values of the health index, is an adjustment parameter (0 < < 1).

[0005] Preferably, in the step S1, the voltage intensity in the distribution box is measured by a voltage transformer; the current intensity in the distribution box is measured by a current transformer; the temperature in the distribution box is measured by a temperature sensor, and the temperature rising rate is expressed as: , where is the temperature change, is the power loss, is the thermal resistance, is the time.

[0006] Preferably, in the step S2, The current deviation degree represents the gap between the actually measured current value and the allowable current range for the operation of the distribution box, and is expressed as: , where is the measured current value, is the normal current value, is the allowable change range of the current; The temperature deviation degree represents the gap between the actual temperature inside the distribution box and the safe operating temperature range, and is expressed as: , where is the actually measured temperature, 、 are respectively the lower limit and the upper limit of the safe operating temperature range; The voltage deviation degree represents the difference between the actual voltage and the standard voltage, and is expressed as: , where is the measured voltage value, is the standard voltage value, is the allowable voltage fluctuation range.

[0007] Preferably, in the step S3, the warning signal is fed back to the controller, and the controller controls the sound and light alarm to give an alarm.

[0008] Compared with the prior art, the beneficial effects of the present invention are: real-time collection of the voltage, current and temperature values of the distribution box, proposing a health index and a warning threshold, identifying the patterns that may cause failures based on historical data, not only paying attention to the current monitoring status of the distribution box, but also focusing on the prevention of possible future failures, which helps to improve the reliability and efficiency of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a flow schematic diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, it is only corresponding to the drawings of the present application for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0011] Please refer to Figure 1 , the present invention provides a technical solution: an intelligent monitoring method for a distribution box, characterized in that it includes the following steps: Step S1, data acquisition: respectively acquire the voltage, current, and temperature data inside the distribution box; Specifically, measure the voltage intensity inside the distribution box through a voltage transformer; measure the current intensity inside the distribution box through a current transformer; measure the temperature inside the distribution box through a temperature sensor, and the temperature rising rate is expressed as: , where is the temperature change, is the power loss, is the thermal resistance, is the time.

[0012] Step S2, health index calculation: calculate the health index according to the data acquired in step S1 to evaluate the working state of the distribution box; The health index is expressed as: ; where 、 、 respectively represent the deviation degrees of the current, temperature, and voltage relative to the normal range, , , are the corresponding weight coefficients; The current deviation degree represents the gap between the actually measured current value and the allowable current range for the operation of this distribution box, and is expressed as: , where is the measured current value, is the normal current value, is the allowable change range of the current; The temperature deviation degree represents the gap between the actual temperature inside the distribution box and the safe operating temperature range, and is expressed as: , where is the actually measured temperature, , They are the lower and upper limits of the safe operating temperature range respectively; Degree of voltage deviation It represents the difference between the actual voltage and the standard voltage, expressed as: , where is the measured voltage value, is the standard voltage value, is the allowable voltage fluctuation range; Step S3, warning threshold setting: Based on the health index in step S2, when it is lower than a certain threshold, a warning signal is triggered to remind the operation and maintenance personnel to check or maintain the distribution box. Specifically, the warning signal is fed back to the controller, and the controller controls the audible and visual alarm to alarm; The threshold is expressed as: ; where , are respectively the historical minimum and maximum values of the health index, is an adjustment parameter (0 < < 1); By presenting the health index to evaluate the working state of the distribution box, the health index involves the voltage, current and temperature factors of the distribution box, then set the warning threshold, compare the health index with the warning threshold, and trigger an alarm after comprehensive evaluation. It can identify the patterns that may lead to failures based on historical data, not only focus on the current monitoring state of the distribution box, but also pay more attention to the prevention of possible future failures, which helps to improve the reliability and efficiency of the power system.

[0013] The parts not detailed in the present invention are the prior art. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, aiming to include all changes falling within the meaning and scope of the equivalent elements in the content of the present invention.

Claims

1. A distribution box intelligent monitoring method, characterized in that: The following steps are involved: Step S1, data collection: respectively collecting voltage, current and temperature data in the distribution box; Step S2, health index calculation: Calculate the health index based on the data collected in step S1 to evaluate the working status of the distribution box; The health index is expressed as: ; in, 、 、 Respectively represent the degree of deviation of current, temperature and voltage from the normal range. , , is the corresponding weight coefficient; Step S3, setting the warning threshold: based on the health index in step S2, when it is lower than a certain threshold, triggering a warning signal to remind the operation and maintenance personnel to check or maintain the distribution box; The threshold is expressed as: ; in, , These are the lowest and highest values ​​in history of the health index, is a tuning parameter (0< <1).

2. According to claim 1, the intelligent monitoring system for distribution box is characterized in that: In step S1, the voltage intensity in the distribution box is measured by a voltage transformer; the current intensity in the distribution box is measured by a current transformer; the temperature in the distribution box is measured by a temperature sensor, and the temperature rise rate is expressed as: , in, is the temperature change, is the power loss, is the thermal resistance, It's time.

3. The intelligent monitoring system for a distribution box according to claim 1 is characterized in that: In the step S2, Current deviation Indicates the difference between the actual measured current value and the current range allowed for the distribution box, expressed as: ,in, is the measured current value, is the normal current value, is the allowable range of variation of current; Temperature deviation Indicates the difference between the actual temperature inside the distribution box and the safe operating temperature range, expressed as: ,in, is the actual measured temperature, , They are the lower and upper limits of the safe operating temperature range respectively; Voltage deviation Indicates the difference between the actual voltage and the standard voltage, expressed as: ,in, is the measured voltage value, is the standard voltage value, is the allowable voltage fluctuation range.

4. The intelligent monitoring system for a distribution box according to claim 1 is characterized in that: In step S3, the warning signal is fed back to the controller, and the controller controls the sound and light alarm to sound an alarm.

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