阅读说明：本技术 一种智能电表的端子座温度实时监测方法 (Terminal block temperature real-time monitoring method of intelligent electric meter ) 是由 章恩友 蒋卫平 姚晓峰 陆聪沛 金波 刘照飞 郭巨锋 李海江 贺东 盛旭朝 张静 于 2020-12-10 设计创作，主要内容包括：本发明涉及一种智能电表的端子座温度实时监测方法,其主要通过检测各个接线端子的温度,并且设置不同阶梯阈值,并进行相应的操作。在一定时间、一定温度范围内,仍旧不发生跳闸操作,当超过超温跳闸阈值后,进行跳闸操作,这样可以避免一些临时突发情况发生而导致的误操作,更加可靠。(The invention relates to a real-time monitoring method for the temperature of a terminal block of an intelligent ammeter, which mainly comprises the steps of detecting the temperature of each wiring terminal, setting different step thresholds and carrying out corresponding operation. In a certain time and a certain temperature range, the tripping operation still does not occur, and when the over-temperature tripping threshold is exceeded, the tripping operation is performed, so that misoperation caused by some temporary emergency situations can be avoided, and the method is more reliable.)

1. A terminal block temperature real-time monitoring method of an intelligent electric meter is characterized by comprising the following steps: the monitoring method is as follows,

a) temperature sensors are respectively implanted in each wiring terminal of the terminal block to acquire the temperature of each wiring terminal, the time interval between two temperature measurements of any wiring terminal is not more than 2 seconds,

b) setting an overtemperature alarm threshold value and an alarm release threshold value, wherein the alarm release threshold value is smaller than the overtemperature alarm threshold value, setting an overtemperature tripping threshold value and a recovery switching-on threshold value, wherein the overtemperature tripping threshold value is larger than the overtemperature alarm threshold value, and the recovery switching-on threshold value is smaller than the alarm release threshold value, and setting judgment delay time;

c) calculating the average temperature value of the wiring terminal per minute, calculating the difference value between the average temperature value of the wiring terminal and the average temperature value of the last minute, wherein the difference value is called the temperature minute change rate, and setting a temperature drastic change threshold value;

d) if the temperatures collected by the wiring terminal within the judgment delay time all exceed the overtemperature alarm threshold value and do not all exceed the overtemperature trip threshold value, generating overtemperature alarm and starting overtemperature recording of a terminal block; if the temperatures collected within the judgment delay time are all lower than the alarm removing threshold value, removing the alarm and finishing the overtemperature record of the terminal base;

e) and if the temperatures collected by the wiring terminals within the judgment delay time all exceed the over-temperature tripping threshold value, executing tripping action, and if the temperatures collected within the judgment delay time all are lower than the recovery closing threshold value, executing closing action or allowing manual closing.

f) If the minute change rate of the temperature of the wiring terminal exceeds the temperature drastic change threshold value, generating a terminal block temperature drastic change alarm, starting a terminal block temperature drastic change event, and if the minute change rate of the temperature is lower than the temperature drastic change threshold value, releasing the terminal block temperature drastic change alarm and ending the terminal block temperature drastic change event.

2. The method for monitoring the temperature of the terminal block of the smart meter in real time according to claim 1, wherein the method comprises the following steps: the temperature measurement error of the temperature sensor is not more than +/-5 ℃, the minimum set value grade difference of an overtemperature alarm threshold value, an alarm release threshold value, an overtemperature trip threshold value and a recovery closing threshold value is 0.1 ℃, and the minimum set value grade difference of delay time is judged to be 1 s.

3. The method for monitoring the temperature of the terminal block of the intelligent electric meter in real time according to claim 2, wherein the method comprises the following steps: the overtemperature alarm threshold, the alarm release threshold, the overtemperature trip threshold and the recovery switch-on threshold are respectively 115 ℃, 110 ℃, 135 ℃ and 90 ℃, and the temperature drastic change threshold is 15.0 ℃/min.

4. The method for monitoring the temperature of the terminal block of the intelligent electric meter in real time according to claim 3, wherein the method comprises the following steps: the electric energy meter includes the electric energy meter casing and locates the control circuit in the electric energy meter casing, control circuit including the management module that is used for realizing the measurement module and the management function of electric energy measurement function, measurement module and the mutual electricity of management module are connected, and measurement module and management module set up at mutual independence in physics, temperature sensor connects the management module.

5. The method for monitoring the temperature of the terminal block of the intelligent electric meter in real time according to claim 4, wherein the method comprises the following steps: the electric energy meter is externally provided with an alarm module, the alarm module is provided with an overtemperature alarm display, an overtemperature trip display and a temperature drastic change display, the electric energy meter is internally provided with a Bluetooth module, and the alarm module is communicated with the electric energy meter through the Bluetooth module.

6. The method for monitoring the temperature of the terminal block of the intelligent electric meter in real time according to claim 5, wherein the method comprises the following steps: the Bluetooth module is physically and independently arranged and can be connected with the management module in a hot plugging manner.

7. The method for monitoring the temperature of the terminal block of the smart meter in real time according to claim 6, wherein the method comprises the following steps: the management module can also be used for hot plug of the expansion module.

Technical Field

The invention relates to a real-time monitoring method for the temperature of a terminal block of an intelligent ammeter.

Background

Become flexible after binding post wiring is not normal or long-time the use, can cause contact resistance too big, under the long-time operation condition of heavy current, can lead to binding post to generate heat, the transition is too high, causes the electric energy meter bamboo shoot piece, can cause incident such as conflagration personal injury when serious. In the prior art, a terminal monitoring function is provided, but generally, the alarm is only carried out and the power supply is cut off after a certain threshold value is exceeded. The temperature rise of the wiring terminal is a general phenomenon, and sometimes only the temperature rise is temporary in an unexpected situation, so that the judgment operation is too simple.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a more reasonable method for monitoring the temperature of the terminal block of the intelligent electric meter in real time.

The invention is realized by the following technical scheme:

a terminal block temperature real-time monitoring method of an intelligent electric meter is characterized by comprising the following steps: the monitoring method is as follows,

a) temperature sensors are respectively implanted in each wiring terminal of the terminal block to acquire the temperature of each wiring terminal, the time interval between two temperature measurements of any wiring terminal is not more than 2 seconds,

b) setting an overtemperature alarm threshold value and an alarm release threshold value, wherein the alarm release threshold value is smaller than the overtemperature alarm threshold value, setting an overtemperature tripping threshold value and a recovery switching-on threshold value, wherein the overtemperature tripping threshold value is larger than the overtemperature alarm threshold value, and the recovery switching-on threshold value is smaller than the alarm release threshold value, and setting judgment delay time;

c) calculating the average temperature value of the wiring terminal per minute, calculating the difference value between the average temperature value of the wiring terminal and the average temperature value of the last minute, wherein the difference value is called the temperature minute change rate, and setting a temperature drastic change threshold value;

d) if the temperatures collected by the wiring terminal within the judgment delay time all exceed the overtemperature alarm threshold value and do not all exceed the overtemperature trip threshold value, generating overtemperature alarm and starting overtemperature recording of a terminal block; if the temperatures collected within the judgment delay time are all lower than the alarm removing threshold value, removing the alarm and finishing the overtemperature record of the terminal base;

e) and if the temperatures collected by the wiring terminals within the judgment delay time all exceed the over-temperature tripping threshold value, executing tripping action, and if the temperatures collected within the judgment delay time all are lower than the recovery closing threshold value, executing closing action or allowing manual closing.

f) If the minute change rate of the temperature of the wiring terminal exceeds the temperature drastic change threshold value, generating a terminal block temperature drastic change alarm, starting a terminal block temperature drastic change event, and if the minute change rate of the temperature is lower than the temperature drastic change threshold value, releasing the terminal block temperature drastic change alarm and ending the terminal block temperature drastic change event.

Preferably, the temperature measurement error of the temperature sensor is not more than +/-5 ℃, the minimum set value difference of the overtemperature alarm threshold value, the alarm release threshold value, the overtemperature trip threshold value and the recovery closing threshold value is 0.1 ℃, and the minimum set value difference of the delay time is judged to be 1 s.

Preferably, the overtemperature alarm threshold, the alarm release threshold, the overtemperature trip threshold and the recovery closing threshold are respectively 115 ℃, 110 ℃, 135 ℃ and 90 ℃, and the temperature drastic change threshold is 15.0 ℃/min.

Preferably, the electric energy meter includes the electric energy meter casing and locates the control circuit in the electric energy meter casing, control circuit including the management module that is used for realizing the measurement module and the management function of electric energy measurement function, measurement module and management module electricity each other are connected, and measurement module and management module set up mutually independently physically, temperature sensor connects the management module.

Preferably, the alarm module is externally arranged, the alarm module is provided with an overtemperature alarm display, an overtemperature trip display and a temperature drastic change display, the electric energy meter is internally provided with a Bluetooth module, and the alarm module is communicated with the electric energy meter through the Bluetooth module.

Preferably, the Bluetooth module is physically arranged independently and can be connected with the management module in a hot plugging mode.

Preferably, the management module can also be used for hot plug of the extension module.

The invention has the beneficial effects that: the invention sets the step threshold value, the tripping operation still does not occur within a certain time and a certain temperature range, and the tripping operation is performed after the overtemperature tripping threshold value is exceeded, so that the misoperation caused by some temporary emergency situations can be avoided, and the reliability is higher.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

A real-time monitoring method for the terminal seat temperature of an intelligent ammeter comprises the following steps,

a) temperature sensors are respectively implanted in each wiring terminal of the terminal block to acquire the temperature of each wiring terminal, the time interval between two temperature measurements of any wiring terminal is not more than 2 seconds,

b) setting an overtemperature alarm threshold value and an alarm release threshold value, wherein the alarm release threshold value is smaller than the overtemperature alarm threshold value, setting an overtemperature tripping threshold value and a recovery switching-on threshold value, wherein the overtemperature tripping threshold value is larger than the overtemperature alarm threshold value, and the recovery switching-on threshold value is smaller than the alarm release threshold value, and setting judgment delay time;

c) calculating the average temperature value of the wiring terminal per minute, calculating the difference value between the average temperature value of the wiring terminal and the average temperature value of the last minute, wherein the difference value is called the temperature minute change rate, and setting a temperature drastic change threshold value;

d) if the temperatures collected by the wiring terminal within the judgment delay time all exceed the overtemperature alarm threshold value and do not all exceed the overtemperature trip threshold value, generating overtemperature alarm and starting overtemperature recording of a terminal block; if the temperatures collected within the judgment delay time are all lower than the alarm removing threshold value, removing the alarm and finishing the overtemperature record of the terminal base;

e) and if the temperatures collected by the wiring terminals within the judgment delay time all exceed the over-temperature tripping threshold value, executing tripping action, and if the temperatures collected within the judgment delay time all are lower than the recovery closing threshold value, executing closing action or allowing manual closing.

f) If the minute change rate of the temperature of the wiring terminal exceeds the temperature drastic change threshold value, generating a terminal block temperature drastic change alarm, starting a terminal block temperature drastic change event, and if the minute change rate of the temperature is lower than the temperature drastic change threshold value, releasing the terminal block temperature drastic change alarm and ending the terminal block temperature drastic change event.

The temperature measurement error of the temperature sensor is not more than +/-5 ℃, the minimum set value difference of an overtemperature alarm threshold value, an alarm release threshold value, an overtemperature trip threshold value and a recovery closing threshold value is 0.1 ℃, and the minimum set value difference of delay time is judged to be 1 s. The overtemperature alarm threshold, the alarm release threshold, the overtemperature trip threshold and the recovery switch-on threshold are respectively 115 ℃, 110 ℃, 135 ℃ and 90 ℃, and the temperature drastic change threshold is 15.0 ℃/min.

The temperature of the terminal of the electric energy meter can be different under different current conditions of different environments, and the step thresholds of the overtemperature alarm and the trip alarm can not meet the requirements of false alarm and frequent alarm, so that a threshold is set for balancing. The delay time is determined to be 20s by default.

If the temperatures collected by the wiring terminals within the judgment delay time of 20s all exceed the overtemperature alarm threshold value of 115 ℃ but not all exceed the overtemperature trip threshold value of 135 ℃, generating an overtemperature alarm and starting overtemperature recording of a terminal base. If the temperatures collected within the time delay are all lower than the alarm release threshold value of 110 ℃, releasing the alarm and finishing the overtemperature record of the terminal block;

and if the temperatures collected by the wiring terminals within the judgment delay time all exceed the over-temperature trip threshold value of 135 ℃, executing a trip action, and if the temperatures collected within the judgment delay time all are lower than the recovery closing threshold value of 90 ℃, executing a closing action or allowing manual closing.

When the temperature is monitored to be changed suddenly, the serious abnormal phenomenon is shown, the condition at the moment is recorded, the tracing problem is facilitated, and the switching-off and power-off are required under the necessary condition, so that the serious loss is avoided.

The electric energy meter comprises an electric energy meter shell and a control circuit arranged in the electric energy meter shell, wherein the control circuit comprises a metering module and a management module, the metering module is used for realizing the electric energy metering function, the management module is used for realizing the management function, the metering module is electrically connected with the management module, the metering module and the management module are physically and independently arranged, and a temperature sensor is connected with the management module. The invention is also externally provided with an alarm module, the alarm module is provided with an overtemperature alarm display, an overtemperature tripping display and a temperature drastic change display, the electric energy meter is internally provided with a Bluetooth module, and the alarm module is communicated with the electric energy meter through the Bluetooth module. The Bluetooth module is physically and independently arranged and can be connected with the management module in a hot plugging manner. The management module can also be used for hot-plugging an expansion module for expanding other functions.

The invention sets the step threshold value, the tripping operation still does not occur within a certain time and a certain overtemperature range, and the tripping operation is performed after the overtemperature tripping threshold value is exceeded, so that the misoperation caused by some temporary emergency situations can be avoided, and the reliability is higher. And a temperature sharp change threshold value is set, so that analysis of various temperature sharp changes is facilitated.