CN113985158A - Residual current protection inspection method, inspection device, electronic device and storage medium - Google Patents

Residual current protection inspection method, inspection device, electronic device and storage medium Download PDF

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Publication number
CN113985158A
CN113985158A CN202111111142.1A CN202111111142A CN113985158A CN 113985158 A CN113985158 A CN 113985158A CN 202111111142 A CN202111111142 A CN 202111111142A CN 113985158 A CN113985158 A CN 113985158A
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current
residual current
action
test
protection
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CN113985158B (en
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王尧
韩克凡
郝晨光
包志舟
蔡慧茂
牛峰
武一
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Zhejiang People Ele Appliance Co ltd
Hebei University of Technology
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Zhejiang People Ele Appliance Co ltd
Hebei University of Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

Provided are a residual current protection inspection method, an inspection device, an electronic apparatus, and a storage medium. The method comprises the steps of obtaining a reference result corresponding to each reference current, wherein the reference result is obtained according to the condition that the reference current is loaded by first equipment, and the reference current is determined according to a sudden change residual current action interval; obtaining a verification result corresponding to the plurality of first test currents for each reference current, wherein the verification result is obtained according to the condition that the plurality of first test currents are loaded by the second equipment respectively, and a first phase angle difference exists between each first test current and the corresponding reference current; determining the reference current as a sudden change residual current action value when the first residual current protector is determined to generate a protection action under the condition of the reference current and the second residual current protector is determined to generate a protection action under the condition of a plurality of first test currents; and determining a target sudden change residual current action value according to the plurality of sudden change residual current action values.

Description

Residual current protection inspection method, inspection device, electronic device and storage medium
Technical Field
Embodiments of the present disclosure relate to the field of fault leakage technologies, and more particularly, to a residual current protection inspection method, an inspection apparatus, an electronic device, a computer-readable storage medium, and a computer program product.
Background
When the power supply system and the electric equipment normally operate, certain normal leakage current exists, the normal leakage current belongs to a normal state, and the safe operation of the power supply system and the electric equipment cannot be influenced. And under the condition of power supply system or electrical equipment failure, the leakage current is increased, the safety power utilization is influenced, even the occurrence of electrical fire can be caused, or the leakage protection is needed when human body electric shock occurs. The residual current comprises normal leakage current and fault leakage current.
Disclosure of Invention
In view of the above, embodiments of the present disclosure provide a residual current protection checking method, a checking device, an electronic device, a computer-readable storage medium, and a computer program product.
One aspect of the disclosed embodiments provides a method for testing residual current protection, including:
obtaining a reference result corresponding to each reference current, wherein the reference result is obtained according to a situation that the reference current is loaded by first equipment, the reference result represents whether a first residual current protector for the first equipment generates a protection action or not under the situation that each reference current is loaded, and the reference current is determined according to a sudden change residual current action interval;
obtaining, for each of the reference currents, a verification result corresponding to a plurality of first test currents, where the verification result is obtained when a plurality of the first test currents are respectively loaded by a second device, each of the first test currents and the corresponding reference current have a first phase angle difference therebetween, and the verification result represents whether a second residual current protector for the second device generates a protection action under the condition of the first test current;
determining the reference current as an abrupt residual current operation value when it is determined that the first residual current protector performs a protection operation under the condition of the reference current and the second residual current protector performs a protection operation under the condition of a plurality of first test currents; and
and determining a target sudden change residual current action value according to a plurality of sudden change residual current action values.
According to an embodiment of the present disclosure, the method for testing residual current protection further includes:
and generating a new reference current according to the reference current when the second residual current protector is determined that one or more first test currents do not have protection actions in the plurality of first test currents, wherein the difference between the new reference current and the reference current comprises a first multiple of the first test current.
According to an embodiment of the present disclosure, the determining a target abrupt change residual current action value according to a plurality of abrupt change residual current action values includes:
and determining the sudden change residual current action value with the minimum value as a target sudden change residual current action value based on a plurality of sudden change residual current action values.
According to an embodiment of the present disclosure, the reference current includes one of a first preset current and an interval end value of the abrupt residual current operation interval; the sudden-change residual current operation interval is used for representing a current range for the residual current protector of the electronic equipment to operate under the condition that the electronic equipment has a fault; the first predetermined current includes a second multiple of the normal leakage current.
According to an embodiment of the present disclosure, the method for testing residual current protection further includes:
testing the first equipment by using the normal leakage current;
testing the second equipment by using a second preset current, wherein a second phase angle difference exists between the second preset current and the normal leakage current;
under the condition that the first residual current protector and the second residual current protector do not have protection action, sequentially applying a first preset applying current to the second equipment until the second residual current protector has protection action;
and determining a lower limit value of the abrupt residual current action interval according to the second preset current and the plurality of first preset applied currents.
According to an embodiment of the present disclosure, the method for testing residual current protection further includes:
under the condition that the first residual current protector and the second residual current protector both have protection actions, a second preset applied current is sequentially applied to the second equipment until the second residual current protector does not have protection actions;
determining an upper limit value of the abrupt residual current action interval according to the second preset current and a plurality of second preset applied currents;
and determining the sudden change residual current operation interval according to the lower limit value and the upper limit value.
According to an embodiment of the present disclosure, the method for testing residual current protection further includes:
and testing according to the intermediate value of the sudden change residual current operation interval to obtain a new sudden change residual current operation interval.
According to the embodiment of the disclosure, the first preset applied current is applied to the second device for multiple tests at each time until the second residual current protector does not generate protection action in the multiple tests;
and applying one second preset applied current for multiple tests on the second equipment each time until the second residual current protector performs protection actions in the multiple tests.
According to an embodiment of the disclosure, the second phase angle difference comprises 180 °
According to an embodiment of the present disclosure, the method for testing residual current protection further includes:
determining a plurality of second test currents according to the sudden change residual current action interval;
performing a plurality of tests on the second device based on each of the second test currents to obtain a test result regarding a protection operation time of the second residual current protector;
and determining the abrupt residual current operation interval as a target abrupt residual current operation interval under the condition that the test result shows that the protection operation time of each test conforms to the fault current operation time standard range corresponding to the second test current.
Another aspect of the embodiments of the present disclosure provides a residual current protection testing device, including:
a first obtaining module, configured to obtain a reference result corresponding to each reference current, where the reference result is obtained according to a situation where the reference current is loaded by a first device, and the reference result represents whether a first residual current protector for the first device generates a protection action under each reference current, where the reference current is determined according to an abrupt-change residual current action interval;
a second obtaining module, configured to obtain, for each of the reference currents, a verification result corresponding to a plurality of first test currents, where the verification result is obtained according to a situation where a second device loads a plurality of the first test currents, each of the first test currents and the corresponding reference current have a first phase angle difference, and the verification result represents whether a second residual current protector for the second device generates a protection action under the situation where the first test current is applied;
a first determining module, configured to determine, when it is determined that the first residual current protector performs a protection operation under the condition of the reference current, and when the second residual current protector performs a protection operation under all of the plurality of first test currents, the reference current as an abrupt residual current operation value; and
and the second determining module is used for determining a target sudden change residual current action value according to a plurality of sudden change residual current action values.
Another aspect of an embodiment of the present disclosure provides an electronic device including: one or more processors; memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method as described above.
Another aspect of embodiments of the present disclosure provides a computer-readable storage medium storing computer-executable instructions for implementing the method as described above when executed.
Another aspect of an embodiment of the present disclosure provides a computer program product comprising computer executable instructions for implementing the method as described above when executed.
According to the embodiment of the disclosure, by obtaining a reference result obtained by loading a plurality of reference currents on a first device and a verification result obtained by loading a plurality of first test currents corresponding to each reference current on a second device respectively, determining that a protection action occurs on the first residual current protector under the condition of the reference currents, and determining a target abrupt residual current action value from a plurality of abrupt residual current action values by a second residual current protector under the condition that the protection actions occur on the first test currents, the technical means of fully considering the influence of a first phase angle difference between the first test currents and the corresponding reference currents on the residual current protection at least partially overcomes the technical problem of poor reliability of the related technology in testing the residual current-based leakage protection method, and the technical effect of improving the reliability of the residual current-based leakage protection method is achieved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:
fig. 1 schematically illustrates a flow chart of a method of residual current protection verification according to an embodiment of the present disclosure;
fig. 2 schematically illustrates a flow chart of a method of residual current protection verification according to another embodiment of the present disclosure;
fig. 3 schematically shows a block diagram of a residual current protection checking device according to an embodiment of the present disclosure; and
fig. 4 schematically shows a block diagram of an electronic device implementing a method of residual current protection verification according to an embodiment of the present disclosure.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
In a single-phase power supply system, normal leakage current of a power supply line or electric equipment cannot influence normal operation of the power supply line or the electric equipment, and personal safety problems cannot be caused. In the running process of a power supply line and electric equipment, leakage current changes due to insulation damage or personal electric shock.
The fault electric leakage under the conditions of insulation damage or personal electric shock and the like and the normal electric leakage of a power supply line or electric equipment have obvious different characteristics, and are mainly embodied in the following aspects:
(1) under normal conditions, a power supply line or electric equipment has distributed resistance and distributed capacitance to the ground, and the capacitive component of the leakage current is large, so the normal leakage current has capacitive characteristics;
(2) under normal conditions, the ground capacitance dispersibility is high in different scenes, so that the normal leakage of a power supply line or electric equipment has large difference and uncertainty exists;
(3) when a power supply line or electric equipment has an insulation fault, the insulation resistance to the ground is reduced under general conditions, and the resistive leakage current is increased;
(4) under the condition of human body electric shock, the human body impedance has a resistive characteristic, so that the fault leakage current is resistive leakage current;
(5) in general, the normal leakage current caused by environmental factors changes relatively slowly, while the leakage current of a power supply line or electric equipment has an insulation fault or a fault caused by human body electric shock changes rapidly.
According to the above analysis, the main characteristics of normal leakage and fault leakage can be summarized into two points, characteristic 1: normal leakage current is mainly capacitive, while fault leakage current is mainly resistive; and (2) feature: normal leakage current typically changes more slowly, while fault leakage current typically changes more rapidly.
The residual current is one of residual currents, and specifically, the residual current is a current whose sum of current vectors of phases (including a neutral line) in the distribution line is not zero. In other words, when an accident occurs on the electricity utilization side, the current flows from the charged body to the ground through the human body, so that the current of each phase in the incoming and outgoing lines of the main circuit is unequal, and the instantaneous vector composite effective value of the current is called residual current, namely leakage current. Wherein, the electric leakage comprises normal electric leakage and fault electric leakage. The method for testing the residual current-based leakage protection method in the related art is poor in effectiveness.
In view of this, the inventor finds that an influence of a first phase angle difference between a first test current loaded by a second device and a corresponding reference current loaded by a first device on residual current protection can be considered, so that the method effectiveness of testing the residual current-based leakage protection method can be improved, and the consistency and reliability of the residual current-variation-based leakage protection can be ensured.
Embodiments of the present disclosure provide a residual current protection inspection method, an inspection apparatus, an electronic device, a computer-readable storage medium, and a computer program product. The method comprises the steps of obtaining a reference result corresponding to each reference current, wherein the reference result is obtained according to the condition that the reference current is loaded by first equipment, and the reference current is determined according to a sudden change residual current action interval; obtaining a verification result corresponding to the plurality of first test currents for each reference current, wherein the verification result is obtained according to the condition that the plurality of first test currents are loaded by the second equipment respectively, and a first phase angle difference exists between each first test current and the corresponding reference current; determining the reference current as a sudden change residual current action value when the first residual current protector is determined to generate a protection action under the condition of the reference current and the second residual current protector is determined to generate a protection action under the condition of a plurality of first test currents; and determining a target sudden change residual current action value according to the plurality of sudden change residual current action values.
Fig. 1 schematically shows a flow chart of a method of residual current protection verification according to an embodiment of the present disclosure.
As shown in fig. 1, the method may include operations S101 to S103.
In operation S101, a reference result corresponding to each reference current is obtained, where the reference result is obtained according to a situation where the first device loads the reference current, and the reference result characterizes whether the first residual current protector for the first device generates a protection action or not according to each reference current, and the reference current is determined according to the abrupt-change residual current action interval.
In operation S102, for each reference current, a verification result corresponding to a plurality of first test currents is obtained, where the verification result is obtained according to a situation where a second device loads the plurality of first test currents, respectively, and a first phase angle difference exists between each first test current and the corresponding reference current, and the verification result represents whether a second residual current protector for the second device generates a protection action under the condition of the first test current.
In operation S103, in a case where it is determined that the first residual current protector has a protection action at the reference current, and the second residual current protector has a protection action at all of the plurality of first test currents, the reference current is determined as an abrupt residual current action value.
In operation S104, a target abrupt residual current action value is determined according to the plurality of abrupt residual current action values.
According to the embodiment of the present disclosure, two electrical circuits are respectively provided, wherein the first circuit is provided with a first device and a first residual current protector, and the second circuit is provided with a second device and a second residual current protector.
According to the embodiment of the disclosure, the first loop loads each reference current, and a reference result of whether the first residual current protector generates a protection action or not can be obtained in the process of loading the reference current on the first loop. And simultaneously, the second loop loads a plurality of first test currents corresponding to the reference current respectively, and a verification result of whether the second residual current protector generates a protection action or not can be obtained in the process of loading the plurality of first test currents corresponding to the reference current by the second loop.
According to the embodiment of the disclosure, for each reference current, the reference current is determined to be an abrupt residual current action value when the first residual current protector is determined to have a protection action under the condition of the reference current, and the second residual current protector is determined to have a protection action under the condition of a plurality of first test currents.
According to the embodiment of the disclosure, since the loops are loaded with a plurality of reference currents respectively, a plurality of abrupt residual current action values can be finally obtained. And determining a final target sudden change residual current action value according to the plurality of sudden change residual current action values.
According to the embodiment of the disclosure, by obtaining a reference result obtained by loading a plurality of reference currents on a first device and a verification result obtained by loading a plurality of first test currents corresponding to each reference current on a second device respectively, determining that a protection action occurs on the first residual current protector under the condition of the reference currents, and determining a target abrupt residual current action value from a plurality of abrupt residual current action values by a second residual current protector under the condition that the protection actions occur on the first test currents, the technical means of fully considering the influence of a first phase angle difference between the first test currents and the corresponding reference currents on the residual current protection at least partially overcomes the technical problem of poor reliability of the related technology in testing the residual current-based leakage protection method, and the technical effect of improving the reliability of the residual current-based leakage protection method is achieved.
According to an embodiment of the present disclosure, the above-mentioned residual current protection checking method may further include the following operations.
And generating a new reference current according to the reference current under the condition that the second residual current protector is determined to have one or more first test currents in the plurality of first test currents without protective action, wherein the difference value of the new reference current and the reference current comprises the first multiple of the first test current.
According to the embodiment of the present disclosure, the first multiple may be specifically set according to requirements, and may be, for example, 0.01 times.
According to the embodiment of the disclosure, in the process of loading a plurality of first test currents, when one or more first test currents are loaded and the second residual current protector does not perform protection action, the second loop re-determines a new reference current, for example, the first test current of the first multiple may be added on the basis of the reference current.
According to the embodiment of the disclosure, the first test current of the first multiple is increased for multiple times, so that the second loop generates protection actions when multiple new first test currents corresponding to the new reference currents are loaded, and therefore the sudden change residual current action value can be determined.
According to an embodiment of the present disclosure, determining the target abrupt residual current action value according to the plurality of abrupt residual current action values may include the following operations.
And determining the sudden change residual current action value with the minimum value as the target sudden change residual current action value based on the plurality of sudden change residual current action values.
According to the embodiment of the disclosure, the minimum reference current, which enables the second residual current protector in the second loop to perform the protection action, of the first test current at all phase angles is determined as a target abrupt change residual current action value I, wherein the range of the target abrupt change residual current action value is as follows: i isΔno＜I≤IΔn，IΔnFirst test currents I representing that the first test currents at all phase angles can enable the second residual current protector in the second loop to generate protection actionsΔnoThe rated leakage non-action current can be represented, and the rated leakage non-action current can be represented as normal leakage current.
According to an embodiment of the present disclosure, the reference current includes one of a first preset current and an interval end value of a sudden-change residual current operation interval; the sudden change residual current action interval is used for representing the current range of the residual current protector action of the electronic equipment under the condition that the electronic equipment has faults; the first predetermined current includes a second multiple of the normal leakage current.
According to an embodiment of the present disclosure, the first phase angle difference includes one of: 0 °, ± 30 °, ± 60 °, ± 90 °, ± 120 °, ± 150 °, 180 °.
According to the embodiment of the disclosure, the first preset current may specifically set the current of any phase angle according to the requirement, the second multiple may specifically set according to the requirement, for example, the first preset current may include 0, 0.5IΔnoOr IΔno。
According to an embodiment of the present disclosure, there are multiple first test currents corresponding to each reference current, e.g., at reference current IΔnIs 0 or 0.5IΔnoIn this case, the first phase angle difference between the first test currents and the reference current may be 0 °, ± 60 °, ± 120 ° or 180 °, respectively. At a reference current IΔnIs IΔnoOr sudden change of the lower limit value of the residual current operation interval, multiple first test currents and the reference current IΔnThe first phase angle difference of (a) may be 0 °, ± 30 °, ± 60 °, ± 90 °, ± 120 °, ± 150 °, 180 °, respectively.
The value of the first phase angle difference is not limited to the above difference, and may be any value.
Fig. 2 schematically shows a flow chart of a method of residual current protection verification according to another embodiment of the present disclosure.
As shown in fig. 2, the method for testing residual current protection may further include operations S201 to S207:
in operation S201, a first device is tested using a normal leakage current.
In operation S202, a second device is tested using a second preset current, where the second preset current has a second phase angle difference from the normal leakage current.
In operation S203, under the condition that neither the first residual current protector nor the second residual current protector has a protection action, a first preset application current is sequentially applied to the second device until the second residual current protector has a protection action.
In operation S204, a lower limit value of the abrupt residual current operation interval is determined according to the second preset current and the plurality of first preset applied currents.
In operation S205, under the condition that both the first residual current protector and the second residual current protector have protection actions, a second preset application current is sequentially applied to the second device until the second residual current protector does not have protection actions.
In operation S206, an upper limit value of the abrupt change residual current operation interval is determined according to the second preset current and the plurality of second preset applied currents.
In operation S207, an abrupt residual current operation interval is determined according to the lower limit value and the upper limit value.
According to an embodiment of the present disclosure, the second predetermined current may include a normal leakage current, and the first predetermined applied current may include a current of any value, for example, 0.1 times the first test current.
According to the embodiment of the disclosure, by continuously applying the first preset applying current, the second preset current having the second phase angle difference with the normal leakage current is loaded into the second loop, so that the second residual current protector in the second loop generates the protection action. And determining a lower limit value of the abrupt residual current action interval according to the second preset current and the first preset applied current applied for multiple times. For example, the lower limit value may be equal to the sum of the second preset current and the first preset applied current applied a plurality of times.
According to an embodiment of the present disclosure, the second preset applied current may include any value of current, for example, 0.1 times the first test current.
According to the embodiment of the disclosure, the second preset current with the second phase angle difference with the normal leakage current is loaded into the second loop through continuously applying the second preset applied current, so that the second residual current protector in the second loop does not generate protection action. And determining the upper limit value of the abrupt change residual current action interval according to the second preset current and the first preset applied current applied for multiple times. For example, the upper limit value may be equal to the sum of the second preset current and the first preset applied current applied a plurality of times.
According to an embodiment of the present disclosure, the above-mentioned residual current protection checking method may further include the following operations.
And testing according to the intermediate value of the sudden change residual current action interval to obtain a new sudden change residual current action interval.
According to the embodiment of the disclosure, in order to obtain the most accurate abrupt residual current operation interval with the minimum range, the obtained intermediate value of the abrupt residual current operation interval can be used as a new second preset current to perform repeated tests.
According to the embodiment of the disclosure, a first preset applied current is applied to the second equipment for multiple tests at each time until the second residual current protector is protected in the multiple tests;
and applying a second preset applied current to test the second equipment for multiple times at each time until the second residual current protector does not generate protection action in multiple tests.
According to the embodiment of the present disclosure, the number of tests includes, but is not limited to, 5, and it should be noted that the number of tests may be specifically set according to the precision requirement of the test.
According to an embodiment of the disclosure, the second phase angle difference comprises 180 °
According to embodiments of the present disclosure, the second phase angle difference may also include any value, for example may be +30 °, ± 60 °, ± 90 °, ± 120 ° or ± 150 °.
According to an embodiment of the present disclosure, the above-mentioned residual current protection checking method may further include the following operations.
And determining a plurality of second test currents according to the sudden change residual current action interval. And testing the second equipment for multiple times based on each second test current to obtain a test result about the protection action time of the second residual current protector. And under the condition that the test result shows that the protection action time of each test conforms to the fault current action time standard range corresponding to the second test current, determining the sudden change residual current action interval as a target sudden change residual current action interval.
According to embodiments of the present disclosure, the second test current may include, but is not limited to, any value in an abrupt residual current action interval.
According to an embodiment of the disclosure, the test current in the first loop may be a normal leakage current IΔno. The second test current in loop two may be IΔn1. And instantly loading the second test current into the second loop to measure the time of the second residual current protector for protection. During multiple tests, the phase angle of the test current in the first loop can be respectively 0 degrees, 60 degrees, 120 degrees and 180 degrees, and the phase angle difference between the second test current in the second loop and the test current in the first loop can be respectively 120 degrees, 135 degrees, 150 degrees and 165 degrees. The test is carried out for a plurality of times respectively at each phase angle, for example, the test can be carried out for 5 times, wherein the protection action time value obtained by each test is in accordance with I in the fault current action time standard rangeΔn1Lower limit value.
According to an embodiment of the present disclosure, the above-mentioned residual current protection checking method may further include the following operations.
And testing the second device for a plurality of times by using a plurality of third test currents. And applying a third preset applied current to each third test current under the condition that the second residual current protector of the second device does not generate protection action so as to determine whether the second residual current protector generates protection action.
According to an embodiment of the disclosure, the test current in the first loop may be 0, and the third test current in the second loop may be the normal leakage current IΔnoThe normal leakage current may have a phase angle of one of 0 °, ± 30 °, ± 60 °, ± 90 °, ± 120 °, ± 150 ° and 180 °, and the third test current is applied abruptly in loop two, the number of tests at each phase angle may include, but is not limited to, 5, and the second residual current protector should not be activated at each test.
According to another embodiment of the present disclosure, the test current in loop one may be 0.5I at any phase angleΔnoOr IΔnoThe test current is loaded into loop one. The third test current in the second loop may be the normal leakage current IΔnoThe phase angle of the third test current is different from the phase angle of the test current in the first loopMay be one of ± 120 °, ± 135 °, ± 150 ° and ± 165 °, and the third test current is applied abruptly in loop two, the number of tests at each phase angle may include, but is not limited to, 5, and the second residual current protector should not be activated at each test.
According to an embodiment of the present disclosure, the above-mentioned residual current protection checking method may further include the following operations.
And acquiring a first test result corresponding to each verification current, wherein the first test result is obtained under the condition that the third equipment loads the test current, and the first test result represents whether a third residual current protector for the third equipment generates a protection action under the condition of each test current.
And acquiring a second test result corresponding to the plurality of fourth test currents for each verification current, wherein the second test result is obtained according to the situation that the fourth test currents are loaded on the fourth equipment respectively, a third phase angle difference exists between each fourth test current and the corresponding verification current, and the second test result represents whether a fourth residual current protector for the fourth equipment generates a protection action under the situation of the fourth test current.
According to an embodiment of the disclosure, each of the third device and the fourth device includes at least one first electronic device, a second electronic device and a corresponding residual current protector connected in series, wherein a normal leakage current I of the second electronic deviceΔn2Is larger than the normal leakage current I of the first electronic equipmentΔn3The protection action time of the second electronic device is longer than that of the first electronic device.
According to an embodiment of the present disclosure, the verification current may include 0, 0.5IΔn2Or IΔn2. The fourth test current may have a current value of IΔn2The third phase angle difference may comprise 120, 150 or 180. And respectively loading the verification current and the fourth test current to the third device and the fourth device so as to judge whether the residual current protectors in the third device and the fourth device generate protection actions. The occurrence of protection action, namely the residual current protector judges that the leakage fault occurs through the protection strategy,and then the residual current protector is switched off so as to remove the fault and realize protection. And no protection action is performed, namely, the residual current protector judges that no leakage fault occurs under the existing protection strategy, so that the residual current protector is not disconnected.
According to another embodiment of the present disclosure, the verification current may include 0, 0.5IΔn2Or IΔn2. The current value of the fourth test current may be a target abrupt residual current action value of the first electronic device, a target abrupt residual current action value of the second electronic device, or a sum of the target abrupt residual current action value of the first electronic device and the target abrupt residual current action value of the second electronic device. The third angular difference may comprise 0 °, ± 30 °, ± 60 °, ± 90 °, ± 120 °, ± 150 ° or 180 °. And respectively loading the verification current and the fourth test current to the third device and the fourth device so as to judge whether the residual current protectors in the third device and the fourth device generate protection actions. And the protection action is carried out, namely the residual current protector judges that the electric leakage fault occurs through the protection strategy, and then the residual current protector is switched on and switched off so as to remove the fault and realize the protection. And no protection action is performed, namely, the residual current protector judges that no leakage fault occurs under the existing protection strategy, so that the residual current protector is not disconnected.
According to another embodiment of the present disclosure, the verification current may include 0, 0.5IΔn2Or IΔn2. The current value of the fourth test current may be the first current, the second current or a normal leakage current of the second electronic device. The third phase angle difference may comprise 0 °. And respectively loading the verification current and the fourth test current to the third device and the fourth device so as to judge whether the residual current protectors in the third device and the fourth device generate protection actions. And the protection action is carried out, namely the residual current protector judges that the electric leakage fault occurs through the protection strategy, and then the residual current protector is switched on and switched off so as to remove the fault and realize the protection. And no protection action is performed, namely, the residual current protector judges that no leakage fault occurs under the existing protection strategy, so that the residual current protector is not disconnected. Wherein the first current is (target sudden change residual current action value of the first electronic device-verification current) +0.1 × the second currentThe target abrupt residual current action value of the sub-device. The second current is a target abrupt residual current action value of the second electronic device, namely the verification current.
Fig. 3 schematically shows a block diagram of a residual current protection checking device according to an embodiment of the present disclosure.
As shown in fig. 3, the residual current protection checking device 300 may include a first obtaining module 310, a second obtaining module 320, a first determining module 330, and a second determining module 340.
The first obtaining module 310 is configured to obtain a reference result corresponding to each reference current, where the reference result is obtained according to a situation that the first device loads the reference current, and the reference result characterizes whether the first residual current protector for the first device generates a protection action or not according to each reference current, and the reference current is determined according to the abrupt-change residual current action interval.
The second obtaining module 320 is configured to obtain, for each reference current, a verification result corresponding to the plurality of first test currents, where the verification result is obtained according to a situation that the second device loads the plurality of first test currents, a first phase angle difference exists between each first test current and the corresponding reference current, and the verification result represents whether a second residual current protector for the second device generates a protection action under the situation of the first test current.
The first determining module 330 is configured to determine the reference current as the abrupt residual current action value when it is determined that the first residual current protector performs the protection action under the condition of the reference current, and the second residual current protector performs the protection action under the condition of the plurality of first test currents.
The second determining module 340 is configured to determine a target abrupt residual current action value according to the plurality of abrupt residual current action values.
According to the embodiment of the disclosure, by obtaining a reference result obtained by loading a plurality of reference currents on a first device and a verification result obtained by loading a plurality of first test currents corresponding to each reference current on a second device respectively, determining that a protection action occurs on the first residual current protector under the condition of the reference currents, and determining a target abrupt residual current action value from a plurality of abrupt residual current action values by a second residual current protector under the condition that the protection actions occur on the first test currents, the technical means of fully considering the influence of a first phase angle difference between the first test currents and the corresponding reference currents on the residual current protection at least partially overcomes the technical problem of poor reliability of the related technology in testing the residual current-based leakage protection method, and the technical effect of improving the reliability of the residual current-based leakage protection method is achieved.
According to an embodiment of the present disclosure, the residual current protection checking device 300 may further include a third determination module.
The third determining module is configured to generate a new reference current according to the reference current when it is determined that the second residual current protector has one or more first test currents among the plurality of first test currents, where a difference between the new reference current and the reference current may include a first multiple of the first test current.
According to an embodiment of the present disclosure, the second determination module 340 may include a first determination unit.
The first determination unit is used for determining the sudden change residual current action value with the minimum value as the target sudden change residual current action value based on the plurality of sudden change residual current action values.
According to an embodiment of the present disclosure, the reference current may include one of a first preset current and an interval end value of the abrupt residual current action interval. The sudden change residual current action interval is used for representing the current range of the residual current protector action of the electronic equipment under the condition that the electronic equipment has a fault. The first predetermined current may include a second multiple of the normal leakage current.
According to an embodiment of the present disclosure, the residual current protection verifying apparatus 300 may further include a first testing module, a second testing module, a first iteration applying module, and a fourth determining module.
The first testing module is used for testing the first equipment by using normal leakage current.
The second testing module is used for testing the second equipment by using a second preset current, wherein a second phase angle difference exists between the second preset current and the normal leakage current.
The first iteration applying module is used for sequentially applying a first preset applying current to the second equipment under the condition that the first residual current protector and the second residual current protector do not have protection action until the second residual current protector has protection action.
The fourth determining module is used for determining a lower limit value of the sudden change residual current action interval according to the second preset current and the plurality of first preset applied currents.
According to an embodiment of the present disclosure, the residual current protection verifying apparatus 300 may further include a second iteration applying module, a fifth determining module, and a sixth determining module.
The second iteration applying module is used for sequentially applying a second preset applying current on the second device under the condition that the first residual current protector and the second residual current protector both have protection actions until the second residual current protector does not have protection actions.
The fifth determining module is used for determining the upper limit value of the sudden change residual current action interval according to the second preset current and the plurality of second preset applied currents.
The sixth determining module is used for determining the sudden change residual current action interval according to the lower limit value and the upper limit value.
According to an embodiment of the present disclosure, the residual current protection testing device 300 may further include a third testing module.
The third testing module is used for testing according to the intermediate value of the sudden change residual current action interval so as to obtain a new sudden change residual current action interval.
According to the embodiment of the disclosure, a first preset applied current is applied to the second equipment for multiple tests at each time until the second residual current protector does not generate protection action in the multiple tests.
And applying a second preset applied current to test the second equipment for multiple times each time until the second residual current protector performs protection actions in multiple tests.
According to an embodiment of the present disclosure, the second phase angle difference may comprise 180 °.
According to an embodiment of the present disclosure, the residual current protection testing device 300 may further include a seventh determining module, an eighth determining module, and a ninth determining module.
The seventh determining module is used for determining a plurality of second test currents according to the sudden change residual current action interval.
The eighth determining module is used for testing the second equipment for multiple times based on each second test current to obtain a test result about the protection action time of the second residual current protector.
The ninth determining module is used for determining the sudden change residual current action interval as a target sudden change residual current action interval under the condition that the test result shows that the protection action time of each test conforms to the fault current action time standard range corresponding to the second test current.
According to an embodiment of the present disclosure, the first phase angle difference may include one of: 0 °, ± 30 °, ± 60 °, ± 90 °, ± 120 °, ± 150 °, 180 °.
Any of the modules, units, or at least part of the functionality of any of them according to embodiments of the present disclosure may be implemented in one module. Any one or more of the modules and units according to the embodiments of the present disclosure may be implemented by being split into a plurality of modules. Any one or more of the modules, units according to the embodiments of the present disclosure may be implemented at least partially as a hardware Circuit, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a system on a chip, a system on a substrate, a system on a package, an Application Specific Integrated Circuit (ASIC), or may be implemented by hardware or firmware in any other reasonable manner of integrating or packaging a Circuit, or implemented by any one of three implementations of software, hardware, and firmware, or any suitable combination of any of them. Alternatively, one or more of the modules, units according to embodiments of the present disclosure may be implemented at least partly as computer program modules, which, when executed, may perform the respective functions.
For example, any plurality of the first obtaining module 310, the second obtaining module 320, the first determining module 330, and the second determining module 340 may be combined and implemented in one module/unit, or any one of the modules/units may be split into a plurality of modules/units. Alternatively, at least part of the functionality of one or more of these modules/units may be combined with at least part of the functionality of other modules/units/sub-units and implemented in one module/unit. According to an embodiment of the present disclosure, at least one of the first obtaining module 310, the second obtaining module 320, the first determining module 330, and the second determining module 340 may be at least partially implemented as a hardware circuit, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a system on a chip, a system on a substrate, a system on a package, an Application Specific Integrated Circuit (ASIC), or may be implemented by hardware or firmware in any other reasonable manner of integrating or packaging a circuit, or implemented by any one of three implementations of software, hardware, and firmware, or any suitable combination of any of them. Alternatively, at least one of the first obtaining module 310, the second obtaining module 320, the first determining module 330 and the second determining module 340 may be at least partially implemented as a computer program module, which when executed, may perform a corresponding function.
It should be noted that the residual current protection checking device portion in the embodiment of the present disclosure corresponds to the residual current protection checking method portion in the embodiment of the present disclosure, and the description of the residual current protection checking device portion specifically refers to the residual current protection checking method portion, and is not repeated herein.
Fig. 4 schematically shows a block diagram of an electronic device adapted to implement the above described method according to an embodiment of the present disclosure. The electronic device shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 4, an electronic device 400 according to an embodiment of the present disclosure includes a processor 401 that can perform various appropriate actions and processes according to a program stored in a Read-Only Memory (ROM) 402 or a program loaded from a storage section 408 into a Random Access Memory (RAM) 403. Processor 401 may include, for example, a general purpose microprocessor (e.g., a CPU), an instruction set processor and/or associated chipset, and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), among others. The processor 401 may also include onboard memory for caching purposes. Processor 401 may include a single processing unit or multiple processing units for performing the different actions of the method flows in accordance with embodiments of the present disclosure.
In the RAM 403, various programs and data necessary for the operation of the electronic apparatus 400 are stored. The processor 401, ROM 402 and RAM 403 are connected to each other by a bus 404. The processor 401 performs various operations of the method flows according to the embodiments of the present disclosure by executing programs in the ROM 402 and/or the RAM 403. Note that the programs may also be stored in one or more memories other than the ROM 402 and RAM 403. The processor 401 may also perform various operations of the method flows according to embodiments of the present disclosure by executing programs stored in the one or more memories.
According to an embodiment of the present disclosure, electronic device 400 may also include an input/output (I/O) interface 405, input/output (I/O) interface 405 also being connected to bus 404. The system 400 may also include one or more of the following components connected to the I/O interface 405: an input section 406 including a keyboard, a mouse, and the like; an output section 407 including a Display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 408 including a hard disk and the like; and a communication section 409 including a network interface card such as a LAN card, a modem, or the like. The communication section 409 performs communication processing via a network such as the internet. A driver 410 is also connected to the I/O interface 405 as needed. A removable medium 411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 410 as necessary, so that a computer program read out therefrom is mounted into the storage section 408 as necessary.
According to embodiments of the present disclosure, method flows according to embodiments of the present disclosure may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable storage medium, the computer program containing program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 409, and/or installed from the removable medium 411. The computer program, when executed by the processor 401, performs the above-described functions defined in the system of the embodiments of the present disclosure. The systems, devices, apparatuses, modules, units, etc. described above may be implemented by computer program modules according to embodiments of the present disclosure.
The present disclosure also provides a computer-readable storage medium, which may be contained in the apparatus/device/system described in the above embodiments; or may exist separately and not be assembled into the device/apparatus/system. The computer-readable storage medium carries one or more programs which, when executed, implement the method according to an embodiment of the disclosure.
According to an embodiment of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. Examples may include, but are not limited to: a portable Computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM) or flash Memory), a portable compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the preceding. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
For example, according to embodiments of the present disclosure, a computer-readable storage medium may include ROM 402 and/or RAM 403 and/or one or more memories other than ROM 402 and RAM 403 described above.
Embodiments of the present disclosure also include a computer program product comprising a computer program containing program code for performing the method provided by the embodiments of the present disclosure, when the computer program product is run on an electronic device, the program code being adapted to cause the electronic device to implement the method of residual current protection verification provided by the embodiments of the present disclosure.
The computer program, when executed by the processor 401, performs the above-described functions defined in the system/apparatus of the embodiments of the present disclosure. The systems, apparatuses, modules, units, etc. described above may be implemented by computer program modules according to embodiments of the present disclosure.
In one embodiment, the computer program may be hosted on a tangible storage medium such as an optical storage device, a magnetic storage device, or the like. In another embodiment, the computer program may also be transmitted, distributed in the form of a signal on a network medium, downloaded and installed through the communication section 409, and/or installed from the removable medium 411. The computer program containing program code may be transmitted using any suitable network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
In accordance with embodiments of the present disclosure, program code for executing computer programs provided by embodiments of the present disclosure may be written in any combination of one or more programming languages, and in particular, these computer programs may be implemented using high level procedural and/or object oriented programming languages, and/or assembly/machine languages. The programming language includes, but is not limited to, programming languages such as Java, C + +, python, the "C" language, or the like. The program code may execute entirely on the user computing device, partly on the user device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.
The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.

Claims (15)

1. A method of residual current protection verification, comprising:
obtaining a reference result corresponding to each reference current, wherein the reference result is obtained according to a situation that the reference current is loaded by first equipment, the reference result represents whether a first residual current protector for the first equipment generates a protection action or not under the situation that each reference current is loaded, and the reference current is determined according to a sudden change residual current action interval;
obtaining a verification result corresponding to a plurality of first test currents for each reference current, wherein the verification result is obtained according to a situation that a plurality of first test currents are loaded on second equipment respectively, a first phase angle difference exists between each first test current and the corresponding reference current, and the verification result represents whether a second residual current protector for the second equipment generates a protection action under the situation that the first test current;
determining the reference current as an abrupt residual current action value when the first residual current protector is determined to have a protection action under the condition of the reference current and the second residual current protector is determined to have a protection action under the condition of a plurality of first test currents; and
and determining a target sudden change residual current action value according to the plurality of sudden change residual current action values.
2. The method of claim 1, further comprising:
and generating a new reference current according to the reference current under the condition that the second residual current protector is determined to have one or more first test currents in the plurality of first test currents, wherein the difference value of the new reference current and the reference current comprises a first multiple of the first test current.
3. The method of claim 1, wherein said determining a target abrupt residual current action value from a plurality of said abrupt residual current action values comprises:
and determining the sudden change residual current action value with the minimum value as a target sudden change residual current action value based on a plurality of sudden change residual current action values.
4. The method of claim 1, wherein the reference current comprises one of a first preset current and an interval end of the abrupt residual current action interval; the sudden change residual current action interval is used for representing a current range used for the residual current protector of the electronic equipment to act under the condition that the electronic equipment has a fault; the first predetermined current includes a second multiple of the normal leakage current.
5. The method of claim 4, further comprising:
testing the first equipment by using the normal leakage current;
testing the second equipment by using a second preset current, wherein a second phase angle difference exists between the second preset current and the normal leakage current;
under the condition that the first residual current protector and the second residual current protector do not have protection actions, sequentially applying a first preset applying current to the second equipment until the second residual current protector has protection actions;
and determining a lower limit value of the abrupt residual current action interval according to the second preset current and the plurality of first preset applied currents.
6. The method of claim 5, further comprising:
under the condition that the first residual current protector and the second residual current protector both have protection actions, sequentially applying a second preset applying current to the second equipment until the second residual current protector does not have protection actions;
determining an upper limit value of the abrupt residual current action interval according to the second preset current and the plurality of second preset applied currents;
and determining the sudden change residual current action interval according to the lower limit value and the upper limit value.
7. The method according to claim 6, wherein the second device is tested a plurality of times by applying one first preset applied current at a time until no protection action occurs in the second residual current protector in the plurality of tests;
and applying one second preset applied current every time to test the second equipment for multiple times until the second residual current protector performs protection actions in multiple tests.
8. The method of claim 5, further comprising:
and testing according to the intermediate value of the sudden change residual current action interval to obtain a new sudden change residual current action interval.
9. The method of claim 5, wherein the second phase angle difference comprises 180 °.
10. The method of claim 1, further comprising:
determining a plurality of second test currents according to the sudden change residual current action interval;
testing the second equipment for multiple times based on each second test current to obtain a test result about the protection action time of the second residual current protector;
and under the condition that the test result shows that the protection action time of each test conforms to the fault current action time standard range corresponding to the second test current, determining the sudden change residual current action interval as a target sudden change residual current action interval.
11. The method of claim 1, wherein the first phase angle difference comprises one of: 0 °, ± 30 °, ± 60 °, ± 90 °, ± 120 °, ± 150 °, 180 °.
12. A residual current protection testing device comprising:
the first obtaining module is used for obtaining a reference result corresponding to each reference current, wherein the reference result is obtained according to the situation that the reference current is loaded by first equipment, the reference result represents whether a first residual current protector used for the first equipment generates a protection action or not under the situation that each reference current is used, and the reference current is determined according to an abrupt-change residual current action interval;
a second obtaining module, configured to obtain, for each reference current, a verification result corresponding to a plurality of first test currents, where the verification result is obtained according to a situation that a second device loads a plurality of first test currents, a first phase angle difference exists between each first test current and the corresponding reference current, and the verification result represents whether a second residual current protector for the second device generates a protection action under the situation that the first test current exists;
the first determining module is used for determining the reference current as a sudden change residual current action value when the first residual current protector is determined to have a protection action under the condition of the reference current and the second residual current protector is determined to have a protection action under the condition of a plurality of first test currents; and
and the second determining module is used for determining a target sudden change residual current action value according to the plurality of sudden change residual current action values.
13. An electronic device, comprising:
one or more processors;
a memory for storing one or more programs,
wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-11.
14. A computer readable storage medium having stored thereon executable instructions which, when executed by a processor, cause the processor to carry out the method of any one of claims 1 to 11.
15. A computer program product comprising a computer program which, when executed by a processor, is adapted to carry out the method of any one of claims 1 to 11.
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