CN113552524B - Measurement module for supporting hot plug and automatic calibration method - Google Patents
Measurement module for supporting hot plug and automatic calibration method Download PDFInfo
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- CN113552524B CN113552524B CN202110671781.7A CN202110671781A CN113552524B CN 113552524 B CN113552524 B CN 113552524B CN 202110671781 A CN202110671781 A CN 202110671781A CN 113552524 B CN113552524 B CN 113552524B
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005259 measurement Methods 0.000 title claims description 57
- 238000004891 communication Methods 0.000 claims abstract description 84
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
The invention relates to an automatic calibration method, a power circuit is electrically connected with a hot plug interface on a circuit breaker/isolating switch; the metering chip is electrically connected with the power circuit, is in telecommunication connection with a hot plug interface on the circuit breaker/isolating switch and is used for measuring the electrical parameters of the circuit; the main control chip is electrically connected with the power circuit, is in telecommunication connection with the metering chip, and can bidirectionally transmit data; the communication circuit is electrically connected with the power supply circuit, the communication circuit is in communication connection with the main control chip, and data can be transmitted between the main control chip and the communication circuit in a bidirectional manner; the short-distance wireless communication module is electrically connected with the power supply circuit, is in communication connection with the main control chip, and can bidirectionally transmit data; so set up, under the condition of not cutting off the power, support the hot plug; meanwhile, the replacement efficiency can be improved, and automatic calibration is realized.
Description
Technical Field
The invention relates to the technical field of low-voltage power distribution, in particular to a measurement module for supporting hot plug and an automatic calibration method.
Background
Currently, a circuit breaker is a switching device capable of closing, carrying and breaking a current under normal or abnormal loop conditions, and the circuit breaker can be used to distribute electric energy, not frequently start an asynchronous motor, and protect a power line, a motor, and the like.
The output end of the circuit breaker is connected with a measuring module, and the measuring module is used for measuring electric parameters on a line, such as information of voltage, current, power, electric quantity and the like. The circuit breaker is provided with a current transformer which needs to be matched with parameters of the measuring module. The quality problem, the use environment, the improper use method and the like of the measuring module cause the misalignment or damage of the measuring module, and the measuring module needs to be replaced.
However, after the measurement module is replaced, the current transformer and the measurement module need to be matched and calibrated after power failure, so that replacement efficiency is low.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a measurement module for supporting hot plug and an automatic calibration method, which have the advantages of improving the replacement efficiency and automatically completing the calibration.
The above object of the present invention is achieved by the following technical solutions: in one aspect, the invention provides a measurement module for supporting hot plug, which comprises a power supply circuit, a metering chip, a main control chip, a communication circuit and a short-distance wireless communication module; the power supply circuit is electrically connected with a hot plug interface on the circuit breaker/isolating switch; the metering chip is electrically connected with the power supply circuit, the metering chip is in telecommunication connection with a hot plug interface on the circuit breaker/isolating switch, and the metering chip is used for measuring the electric parameters of a circuit; the main control chip is electrically connected with the power supply circuit, the main control chip is in telecommunication connection with the metering chip, and data can be transmitted between the main control chip and the metering chip in a bidirectional manner; the communication circuit is electrically connected with the power supply circuit, the communication circuit is in communication connection with the main control chip, and data can be transmitted between the main control chip and the communication circuit in a bidirectional manner; the short-distance wireless communication module is electrically connected with the power supply circuit, the short-distance wireless communication module is in communication connection with the main control chip, and data can be transmitted in two directions between the short-distance wireless communication module and the main control chip.
Preferably, the measurement module for supporting hot plug is provided, the short-distance wireless communication module is used for being in communication connection with a connection device, and the connection device is used for reading the performance parameters of the current transformer in the circuit breaker/isolating switch.
On the other hand, the invention provides an automatic calibration method, which adopts the measuring module; the circuit breaker/disconnector comprises a body and a current transformer, the current transformer being arranged in the body;
the automatic calibration includes the steps of:
inserting the measuring module at a hot plug interface of the breaker/isolating switch, and acquiring performance parameters of a current transformer arranged in the body by the measuring module in a communication mode;
and the measurement module recalibrates the internal register parameters of the metering chip through the obtained performance parameters of the current transformer.
Preferably, in the automatic calibration method provided by the present invention, the inserting the measurement module at the hot plug interface of the breaker/disconnecting switch, the measurement module obtaining, by a communication manner, performance parameters of a current transformer provided in the body, further includes: before the circuit breaker/isolating switch leaves the factory, the performance parameters of the current transformer arranged in the body are matched with the body.
Preferably, in the automatic calibration method provided by the present invention, before the circuit breaker/disconnector leaves the factory, the method matches the performance parameters of the current transformer arranged in the body with the body, and further includes: the coding and performance parameters of the current transformer are identified outside the current transformer by means of identifiers.
Preferably, the automatic calibration method provided by the invention, the coding and performance parameters of the current transformer are identified outside the current transformer in an identifier manner, and the automatic calibration method further comprises the following steps: and measuring and recording the performance parameters of the current transformer.
Preferably, in the automatic calibration method provided by the present invention, before the circuit breaker/disconnector leaves the factory, performance parameters of a current transformer arranged in the body are matched with the body, and the automatic calibration method further includes:
and identifying the performance parameters of the current transformer outside the body in the form of identification codes.
Preferably, in the automatic calibration method provided by the present invention, the measurement module is inserted at a hot plug interface of the circuit breaker/isolating switch, and the measurement module obtains performance parameters of a current transformer arranged in the body in a communication manner, including: and scanning the identification code through the connecting device to acquire the performance parameters of the current transformer arranged in the body.
Preferably, the automatic calibration method provided by the invention further comprises the following steps: and before the measurement module leaves the factory, calibrating the measurement module.
Preferably, in the automatic calibration method provided by the present invention, before the measurement module leaves the factory, the calibration of the measurement module includes: calibrating the measuring module through a standard source and a current transformer with the precision performance higher than the precision grade of the measuring module; and identifying the communication address of the measurement module on the measurement module.
In summary, the beneficial technical effects of the invention are as follows: according to the automatic calibration method, the current transformer and the measurement module are matched and calibrated, and the measurement module comprises a power circuit, a metering chip, a main control chip, a communication circuit and a short-distance wireless communication module; the power supply circuit is electrically connected with a hot plug interface on the circuit breaker/isolating switch; the metering chip is electrically connected with the power circuit, is in telecommunication connection with a hot plug interface on the circuit breaker/isolating switch and is used for measuring the electrical parameters of the circuit; the main control chip is electrically connected with the power circuit, is in telecommunication connection with the metering chip, and can bidirectionally transmit data; the communication circuit is electrically connected with the power supply circuit, the communication circuit is in communication connection with the main control chip, and data can be transmitted between the main control chip and the communication circuit in a bidirectional manner; the short-distance wireless communication module is electrically connected with the power supply circuit, is in communication connection with the main control chip, and can bidirectionally transmit data; the automatic calibration process comprises the following steps: the measuring module acquires the performance parameters of the set current transformer and recalibrates the parameters of the internal register of the metering chip; the method comprises the steps of carrying out a first treatment on the surface of the So set up, under the condition of not cutting off the power, support the hot plug; meanwhile, the replacement efficiency can be improved, and automatic calibration is realized.
Drawings
Fig. 1 is a schematic structural diagram of a measurement module and a circuit breaker according to an embodiment of the present invention.
Fig. 2 is a flowchart of an automatic calibration method according to another embodiment of the present invention.
Fig. 3 is a flowchart of a second embodiment of an automatic calibration method according to the present invention.
Fig. 4 is a flowchart of an automatic calibration method according to another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a measurement module for supporting hot plug disclosed in the present invention includes a power circuit, a metering chip, a main control chip, a communication circuit and a short-distance wireless communication module; the power supply circuit is electrically connected with a hot plug interface on the circuit breaker/isolating switch; the power supply circuit is connected with the hot plug interface of the breaker/isolating switch in a pluggable manner, so that the measuring module is convenient to maintain on one hand; on the other hand, under the condition of no power failure, calibration can be performed, so that the calibration efficiency is improved, and the calibration time is saved.
The metering chip is electrically connected with the power circuit, is in telecommunication connection with a hot plug interface on the circuit breaker/isolating switch, and is used for measuring the electrical parameters of the circuit; the main control chip is electrically connected with the power circuit, the main control chip is in telecommunication connection with the metering chip, and data can be transmitted between the main control chip and the metering chip in a bidirectional manner, namely, the main control chip can transmit data to the metering chip, and the metering chip can also transmit data to the main control chip; the power supply circuit is used for supplying power to the metering chip and the main control chip.
In the embodiment, the communication circuit is electrically connected with the power supply circuit, the communication circuit is in communication connection with the main control chip, and data can be transmitted between the main control chip and the communication circuit in a bidirectional manner; the short-distance wireless communication module is electrically connected with the power supply circuit, is in communication connection with the main control chip, and can bidirectionally transmit data; the power supply circuit supplies power to the communication circuit and the short-range wireless communication module.
The communication circuit is in communication connection with the master station server, and data can be transmitted in two directions between the communication circuit and the master station server. The metering chip transmits the measured electric parameters of the line to the main control chip, and the main control chip transmits the acquired electric parameters of the line to the main station server through the communication circuit.
Further, in this embodiment, the short-distance wireless communication module is used for being in communication connection with a connection device, and the connection device is used for reading performance parameters of the current transformer in the circuit breaker/isolating switch; the connecting device transmits the acquired performance parameters of the current transformer to the short-distance wireless communication module, the short-distance wireless communication module transmits the acquired performance parameters of the current transformer to the main control chip in a communication mode, the main control chip transmits the acquired performance parameters of the current transformer to the metering chip, and the metering chip recalibrates the parameters of an internal register of the metering chip; therefore, automatic calibration is realized, and labor is saved.
Of course, the performance parameters of the current transformer in the breaker/isolating switch can also be transmitted to the main control chip through the communication circuit by the main station server, then the main control chip transmits the acquired performance parameters of the current transformer to the metering chip, and the metering chip recalibrates the parameters of the internal register; thereby, automatic calibration is achieved.
With continued reference to fig. 1-3, another embodiment provides an automatic calibration method, employing the measurement module described above, the circuit breaker/disconnector includes a body and a current transformer disposed within the body; wherein, be provided with hot plug interface on the body, but circuit breaker/isolator pass through hot plug interface and measurement module plug connection, through setting up hot plug interface, when measurement module calibrates, need not carry out the outage, from this, save time improves measurement module's change efficiency.
Specifically, the input end of the hot plug interface is connected with the main circuit and the current transformer, and the output end of the hot plug interface is connected with the measuring module in a pluggable manner, so that the measuring module is convenient to maintain.
The body is marked with an identifier, the identifier records the codes and the performance parameters of the current transformer, the connection device scans the identifier to obtain the performance parameters of the current transformer, and the connection device transmits the obtained performance parameters of the current transformer into the measurement module in a communication mode; therefore, matching calibration of the current transformer and the measuring module is facilitated.
In the above embodiment, the body is further provided with a thermal trip and a magnetic trip, both of which are used for cutting off the circuit when the circuit breaker/disconnector encounters a fault, so as to avoid damage to the circuit breaker/disconnector.
With continued reference to fig. 3, in this embodiment, the automatic calibration includes the steps of:
s101, inserting a measuring module at a hot plug interface of a breaker/isolating switch, and acquiring performance parameters of a current transformer arranged in the body by the measuring module in a communication mode.
Specifically, the performance parameters of the current transformer are transmitted to the main control chip in a communication mode, and the main control chip transmits the acquired performance parameters of the current transformer to the metering chip.
S102, the measuring module recalibrates the internal register parameters of the metering chip through the obtained performance parameters of the current transformer.
Further, in this embodiment, the measurement module is inserted at the hot plug interface of the breaker/isolating switch, and the measurement module obtains the performance parameters of the current transformer disposed in the body in a communication manner, which further includes: before leaving the factory, the breaker/isolating switch matches the performance parameters of the current transformer arranged in the body with the body.
With continued reference to fig. 2, in this embodiment, before the circuit breaker/disconnector leaves the factory, the performance parameters of the current transformer disposed in the body are matched with the body, and before this, the method further includes: identifying the codes and the performance parameters of the current transformer outside the current transformer in an identifier mode; therefore, the performance parameters of the current transformer are convenient to check.
The identifier may be a two-dimensional code, for example, although the identifier may be a bar code. In the realizable mode that the identifier is the two-dimensional code, before the circuit breaker/isolating switch leaves the factory, the information of the two-dimensional code of the current transformer arranged in the body is matched with the body, and the parameter information of the current transformer is obtained by scanning the two-dimensional code, so that the time is saved, and the working efficiency is improved.
Further, in this embodiment, the encoding and performance parameters of the current transformer are identified outside the current transformer by means of identifiers, and further includes: and measuring and recording the performance parameters of the current transformer.
Further, in this embodiment, before the circuit breaker/isolating switch leaves the factory, the performance parameters of the current transformer disposed in the body are matched with the body, and the method further includes: the performance parameters of the current transformer are identified outside the body in the form of identification codes.
In this embodiment, the identification code may be a two-dimensional code, or the identification code may be an RFID, which is not limited in this embodiment.
In the above embodiment, the measurement module is inserted at the hot plug interface of the circuit breaker/isolating switch, and obtains the performance parameters of the current transformer arranged in the body in a communication manner, including: and scanning the identification code through the connecting device to obtain the performance parameters of the current transformer arranged in the body.
The connecting device acquires the performance parameters of the current transformer through scanning the identification code, then transmits the performance parameters to the main control chip through the short-distance wireless communication module, and the main control chip transmits the acquired performance parameters of the current transformer to the metering chip and recalibrates the parameters of an internal register of the metering chip.
The connecting device can be a palm machine, and can also be other devices with the function of scanning identification codes.
For example, in order to facilitate the reading of the performance parameters of the current transformer, the performance parameters of the current transformer can be uploaded to a master station server, after the measurement module is inserted at the hot plug interface of the breaker/isolating switch, the performance parameters of the current transformer are obtained through the master station server and then transmitted to a main control chip through a communication circuit, the main control chip transmits the obtained performance parameters of the current transformer to a metering chip, and then the internal register parameters of the metering chip are recalibrated; therefore, the measurement module automatically completes calibration without personnel intervention.
In some realizable modes, in order to facilitate the reading of the performance parameters of the current transformer, the performance parameters of the current transformer can be stored in Flash or other memory chips of the body, the performance parameters of the current transformer are transmitted to the main control chip in a communication mode, the main control chip transmits the acquired performance parameters of the current transformer to the metering chip, and then the internal register parameters of the metering chip are recalibrated.
Of course, in embodiments in which the performance parameters of the current transformer are stored in Flash or other memory chips of the body, the performance parameters of the current transformer may also be transmitted directly to the metering chip by way of communication, and the internal register parameters of the metering chip may be recalibrated.
With continued reference to fig. 2, the automatic calibration method provided in this embodiment further includes: before the measurement module leaves the factory, calibrating the measurement module; therefore, the performance of the measurement module is judged, and the qualification of the performance of the measurement module before delivery is ensured.
Further, in this embodiment, before the measurement module leaves the factory, the calibration of the measurement module includes: calibrating the measuring module through a standard source and a current transformer with the precision performance higher than the precision level of the measuring module; identifying a communication address of the measurement module on the measurement module; by identifying the communication address of the measurement module on the measurement module, the identification of the individual measurement modules is thereby facilitated.
Specifically, the accuracy level of the current transformer for calibrating the measuring module is 2 times higher than that of the measuring module, so that the performance of the measuring module before delivery is further ensured to be qualified.
With continued reference to fig. 4, other embodiments provide an automatic calibration method comprising the steps of:
s201, uniformly prescribing performance parameters of the current transformer through standards or specifications; therefore, the current transformer can be suitable for measurement modules with different precision grade requirements, and the use universality of the current transformer is improved.
S202, before the measuring module leaves the factory, calibrating the measuring module by using a standard source and a current transformer with the precision performance being more than 2 times higher than the precision grade of the measuring module, and marking the communication address of the measuring module on the measuring module.
And S203, before the circuit breaker/isolating switch leaves the factory, respectively performing performance tests on the upper limit and the lower limit of the current transformer with the performance parameters uniformly specified by the standard or the specification.
S204, inserting the measuring module at a hot plug interface of the breaker/isolating switch to finish the field replacement of the measuring module; therefore, the replacement efficiency of the measurement module is improved, and plug and play is realized.
According to the automatic calibration method provided by the embodiment, the current transformer and the measurement module are matched and calibrated, and the measurement module comprises a power circuit, a metering chip, a main control chip, a communication circuit and a short-distance wireless communication module; the power supply circuit is electrically connected with a hot plug interface on the circuit breaker/isolating switch; the metering chip is electrically connected with the power circuit, is in telecommunication connection with a hot plug interface on the circuit breaker/isolating switch and is used for measuring the electrical parameters of the circuit; the main control chip is electrically connected with the power circuit, is in telecommunication connection with the metering chip, and can bidirectionally transmit data; the communication circuit is electrically connected with the power supply circuit, the communication circuit is in communication connection with the main control chip, and data can be transmitted between the main control chip and the communication circuit in a bidirectional manner; the short-distance wireless communication module is electrically connected with the power supply circuit, is in communication connection with the main control chip, and can bidirectionally transmit data; the automatic calibration process comprises the following steps: the measuring module acquires the performance parameters of the set current transformer and recalibrates the parameters of the internal register of the metering chip; so set up, under the condition of not cutting off the power, support the hot plug; meanwhile, the replacement efficiency can be improved, and automatic calibration is realized.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present invention and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (9)
1. A measurement module for supporting hot plug, characterized by: the system comprises a power supply circuit, a metering chip, a main control chip, a communication circuit and a short-distance wireless communication module;
the power supply circuit is electrically connected with a hot plug interface on the circuit breaker/isolating switch;
the metering chip is electrically connected with the power supply circuit, the metering chip is in telecommunication connection with a hot plug interface on the circuit breaker/isolating switch, and the metering chip is used for measuring the electric parameters of a circuit;
the main control chip is electrically connected with the power supply circuit, the main control chip is in telecommunication connection with the metering chip, and data can be transmitted between the main control chip and the metering chip in a bidirectional manner;
the communication circuit is electrically connected with the power supply circuit, the communication circuit is in communication connection with the main control chip, and data can be transmitted between the main control chip and the communication circuit in a bidirectional manner;
the short-distance wireless communication module is electrically connected with the power supply circuit, is in communication connection with the main control chip, and can bidirectionally transmit data;
the short-range wireless communication module is used for being in communication connection with a connecting device, and the connecting device is used for reading performance parameters of a current transformer in the circuit breaker/isolating switch.
2. An automatic calibration method using the measurement module of claim 1, characterized in that: the circuit breaker/disconnector comprises a body and a current transformer, the current transformer being arranged in the body;
the automatic calibration includes the steps of:
inserting the measuring module at a hot plug interface of the breaker/isolating switch, and acquiring performance parameters of a current transformer arranged in the body by the measuring module in a communication mode;
and the measurement module recalibrates the internal register parameters of the metering chip through the obtained performance parameters of the current transformer.
3. The automatic calibration method according to claim 2, characterized in that: the measuring module is inserted in the hot plug interface of the breaker/isolating switch, and the measuring module obtains the performance parameters of the current transformer arranged in the body in a communication mode, and the measuring module further comprises:
before the circuit breaker/isolating switch leaves the factory, the performance parameters of the current transformer arranged in the body are matched with the body.
4. An automatic calibration method according to claim 3, characterized in that: before the circuit breaker/isolating switch leaves the factory, the performance parameters of the current transformer arranged in the body are matched with the body, and the circuit breaker/isolating switch further comprises:
the coding and performance parameters of the current transformer are identified outside the current transformer by means of identifiers.
5. The automatic calibration method according to claim 4, wherein: the method for identifying the coding and the performance parameters of the current transformer outside the current transformer in an identifier manner further comprises the following steps:
and measuring and recording the performance parameters of the current transformer.
6. An automatic calibration method according to claim 3, characterized in that: before the circuit breaker/isolating switch leaves the factory, will set up the current transformer's in the body performance parameter with the body phase-match still includes:
and identifying the performance parameters of the current transformer outside the body in the form of identification codes.
7. The automatic calibration method according to claim 6, wherein: the measuring module is inserted in a hot plug interface of the breaker/isolating switch, and the measuring module obtains performance parameters of the current transformer arranged in the body in a communication mode, and the measuring module comprises:
and scanning the identification code through the connecting device to acquire the performance parameters of the current transformer arranged in the body.
8. The automatic calibration method according to claim 2, characterized in that: further comprises:
and before the measurement module leaves the factory, calibrating the measurement module.
9. The automatic calibration method according to claim 8, wherein: before the measurement module leaves the factory, the measurement module is calibrated, and the method comprises the following steps:
calibrating the measuring module through a standard source and a current transformer with the precision performance higher than the precision grade of the measuring module;
and identifying the communication address of the measurement module on the measurement module.
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