CN115808643B - Electrical cabinet function test board with real-time data acquisition function - Google Patents
Electrical cabinet function test board with real-time data acquisition function Download PDFInfo
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- CN115808643B CN115808643B CN202310065913.0A CN202310065913A CN115808643B CN 115808643 B CN115808643 B CN 115808643B CN 202310065913 A CN202310065913 A CN 202310065913A CN 115808643 B CN115808643 B CN 115808643B
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Abstract
The invention relates to the technical field of electrical engineering, in particular to an electrical cabinet function test board with real-time data acquisition, which comprises the following components: the signal processing unit comprises a plurality of signal conversion modules; the contact unit is connected with the signal processing unit and comprises a plurality of contactors respectively connected with each output branch of the electric energy distribution system of the electric cabinet; the universal meter is used for acquiring the leakage voltage of the electrical cabinet shell in real time; the insulation temperature sensor is used for acquiring the temperature of the electrical cabinet shell in real time; the alarm unit is connected with the upper computer and used for initiating an overhaul prompt of an electrical cabinet area; and the upper computer is used for judging the area where the interaction function of the electrical cabinet has faults according to the comparison result of the response signal intensity obtained by each signal conversion module and the signal intensity of the reference digital signal. According to the invention, the plurality of signal conversion modules are arranged in different areas of the electric cabinet, so that the fault area of the electric cabinet can be quickly locked.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to an electrical cabinet function test board with real-time data acquisition.
Background
The control cabinet of the programmable logic controller (Programmable Logic Controller, PLC) is an electrical cabinet which realizes the control of a motor, a switch and the like through the PLC. The PLC control cabinet is internally provided with components such as a PLC, a circuit breaker, a power supply, an electric energy distribution device and the like, and the control of a motor, a switch and the like is realized through the mutual cooperation of the components. At present, when testing the PLC control cabinet, the PLC control cabinet is tested in a manual mode. However, since the PLC control cabinet includes various components, the connection relationship and the logic control relationship of each component are complex, it takes a long time to test the PLC control cabinet by a manual manner, and the PLC control cabinet must stop working when testing the electrical cabinet.
Chinese patent CN102253300B provides a numerically-controlled machine tool electric cabinet detector, comprising a power supply circuit including an ac/dc conversion module for converting ac mains into dc, the input end of the ac/dc conversion module being connected to ac mains via a power switch (QF 1), and the ac/dc conversion module being provided with
The high level output port of the device is connected with a direct current measuring head; also included is an input test multi-socket (CF 31), and an output test multi-socket (CF 33); the state of the PLC input signal/output control circuit in the electric cabinet of the numerical control machine tool can be rapidly judged according to the display state and the number of the light emitting diode, but the problem that the electric cabinet needs to be stopped when the electric cabinet is tested is still not solved.
Disclosure of Invention
Therefore, the invention provides the electrical cabinet function test board with real-time data acquisition, which can solve the problem that the electrical cabinet needs to stop working when the electrical cabinet is tested.
To achieve the above object, the present invention provides an electrical cabinet function test stand with real-time data acquisition, comprising:
the signal processing unit comprises a plurality of signal conversion modules for converting current signals into digital signals in real time and an output current integration module which is respectively connected with each output branch of the electric energy distribution system of the electric cabinet so as to integrate the output current signals of each output branch of the electric energy distribution system in real time;
the contact unit is connected with the signal processing unit and comprises a plurality of contactors respectively connected with each output branch of the electric energy distribution system of the electric cabinet, and each contactor is used for controlling the on-off between each output branch of the electric energy distribution system and the signal processing unit;
the universal meter is connected with the electrical cabinet shell and used for acquiring the leakage voltage of the electrical cabinet shell in real time and transmitting the leakage voltage to the upper computer;
the insulation temperature sensor is connected with the electrical cabinet shell and used for acquiring the temperature of the electrical cabinet shell in real time and transmitting the temperature to the upper computer;
The upper computer includes:
the fault identification module is connected with the signal processing unit and used for judging whether the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity of the reference digital signal acquired by the first signal conversion module connected with the input end of the electrical cabinet and the signal intensity of the first response signal acquired by the second signal conversion module connected with the output current integration module;
the fault area judging module is connected with the fault identification module and is used for judging an area with fault of the interaction function of the electrical cabinet according to comparison results of the response signal intensity obtained by each signal conversion module and the signal intensity of the reference digital signal;
a signal timing recording module connected to the fault recognition module, which obtains the time sequence of the reference digital signal to form a reference timing signal and obtains the time sequence of the first response signal to form a first response timing signal;
the circuit breaker monitoring module is connected with the signal time sequence recording module and used for acquiring the sensitivity of the circuit breaker of the electric cabinet according to the delay time of the circuit breaker of the electric cabinet;
and the electrical cabinet shell monitoring module is connected with the universal meter and used for judging whether the electrical cabinet shell is leaked or not according to the display voltage of the universal meter.
Further, the first signal conversion module converts the total input current signal of the input end of the electrical cabinet into a reference digital signal in real time and sends the reference digital signal to the fault recognition module, the output current signal integration module integrates the output current signals of all output branches of the electric energy distribution system of the electrical cabinet in real time to generate a first current signal to be detected, the second signal conversion module converts the first current signal to a first response signal and sends the first response signal to the fault recognition module, the fault recognition module judges whether the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity D0 of the reference digital signal and the signal intensity D1 of the first response signal,
if D1 < (1-eta 1) multiplied by D0, the fault identification module judges that the interaction function of the electric cabinet has faults;
if D1 is more than or equal to (1-eta 1) multiplied by D0, the fault identification module judges that the interaction function of the electric cabinet has no fault;
wherein η1 is a first standard value of the power design loss rate.
Further, the electrical cabinet function test board also comprises an alarm unit connected with the upper computer, the alarm unit is used for initiating an electrical cabinet area maintenance prompt, when the fault identification module judges that the interaction function of the electrical cabinet has faults, a first contactor connected with an input circuit of an electric energy distribution system of the electrical cabinet is connected, a third signal conversion module connected with the first contactor converts an input circuit current signal of the electric energy distribution system of the electrical cabinet into a second response signal, the fault area judgment module judges the area where the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity D0 of the reference digital signal and the signal intensity D2 of the second response signal,
If D2 < (1-eta 2) multiplied by D0, the fault area judging module judges that the area with fault of the interaction function of the electrical cabinet is an electrical energy distribution system input circuit of the electrical cabinet, and the alarm unit initiates an electrical energy distribution system input circuit overhaul prompt;
if D2 is more than or equal to (1-eta 2) multiplied by D0, the fault area judging module judges that the area with fault of the interaction function of the electrical cabinet is an electric energy distribution system output circuit of the electrical cabinet;
wherein eta 2 is a second standard value of the electric energy design loss rate, and eta 2 is smaller than eta 1.
Further, when the failure area judging module judges that the area where the interaction function of the electrical cabinet has failure is the output circuit of the electrical energy distribution system of the electrical cabinet, the failure area judging module acquires the failure area of the output circuit of the electrical energy distribution system of the electrical cabinet according to the signal intensity D1 of the first response signal, wherein,
if D1 is smaller than alpha multiplied by D0, the fault area judging module acquires a fault area of an output circuit of the electric energy distribution system of the electric cabinet as a total output end, and the alarm unit initiates a circuit overhaul prompt of the total output end of the output circuit of the electric energy distribution system;
if D1 is more than or equal to alpha multiplied by D0, the fault area judging module acquires a fault area of an output circuit of an electric energy distribution system of the electric cabinet as each output branch;
And alpha is an electric energy acquisition adjustment coefficient of the total output end of the output circuit of the electric energy distribution system of the electric cabinet.
Further, when the fault area of the output circuit of the electric energy distribution system of the electric cabinet is the output branches, each contactor connected with each output branch is respectively connected, the fourth signal conversion module respectively connected with each contactor converts the current signals of the first output branch, the second output branch, … and the nth output branch into third response signals, the fourth response signals are …, the n+2 response signals are transmitted to the fault area judgment module, n is the number of output branches of the output circuit of the electric energy distribution system of the electric cabinet, the fault area judgment module judges whether the ith-2 output branch has faults according to the signal intensity di of the ith response signal, i=3, 4, … and n+2,
if di < (1-eta 2) multiplied by ai multiplied by D1, the fault area judging module judges that the i-2 output branch has faults, and the alarm unit initiates an i-2 output branch overhaul prompt;
if di is more than or equal to (1-eta 2) xai x D1, the fault area judging module judges that the i-2 output branch has no fault;
wherein ai is the electric energy distribution ratio of the electric energy distribution system of the electric cabinet to the i-2 output branch.
Further, when the fault recognition module judges that the interaction function of the electric cabinet has no fault, the electric cabinet shell monitoring module judges whether the electric cabinet shell has electric leakage or not according to the display voltage U of the universal meter, wherein,
if U is more than or equal to U0, the electric cabinet shell monitoring module judges that electric leakage occurs in the electric cabinet shell, and the alarm unit initiates an electric cabinet electric leakage alarm;
if U is less than U0, the electric cabinet shell monitoring module judges that electric leakage does not occur in the electric cabinet shell;
and U0 is a maximum threshold value of the leakage voltage of the electrical cabinet preset by the electrical cabinet shell monitoring module.
Further, when the electrical cabinet shell monitoring module judges that the electrical cabinet shell is in electric leakage, the insulation temperature sensor starts to operate, and the electrical cabinet shell monitoring module judges whether the alarm unit initiates fire early warning prompt according to the electrical cabinet shell temperature Tw acquired by the insulation temperature sensor and the display voltage U of the universal meter,
if U0 is less than or equal to U2 XU 0 and Tw is less than T0, the electric cabinet shell monitoring module judges that the alarm unit does not initiate fire early warning prompt;
if U0 is less than or equal to U2 XU 0 and Tw is more than or equal to T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a primary fire early warning prompt;
If U is more than or equal to 2 XU 0 and Tw is less than T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a primary fire early warning prompt;
if U is more than or equal to 2 XU 0 and Tw is more than or equal to T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a secondary fire early warning prompt;
and T0 is a highest threshold value of the temperature of the electrical cabinet preset by the electrical cabinet shell monitoring module.
Further, when the electrical cabinet housing monitoring module judges that no leakage occurs in the electrical cabinet housing, the signal timing recording module acquires a time sequence of a reference digital signal to form a reference timing signal, acquires a time sequence of the first response signal to form a first response timing signal, the signal timing recording module presets a minimum threshold value of the reference timing signal strength as Dmin, presets a maximum threshold value of the reference timing signal strength as Dmax, and when the signal strength Du of a certain time point tc of the reference timing signal on a time axis is smaller than Dmin or larger than Dmax, the fault identification module judges whether a fault exists in a circuit breaker of the electrical cabinet according to the signal strength Dc of the first response timing signal at any time point in a period from the time point tc to the time point tc+Δt,
if Dc=0, the fault identification module judges that the circuit breaker of the electrical cabinet has no fault;
If Dc is not equal to 0, the fault identification module judges that the circuit breaker of the electric cabinet has faults, and the alarm unit initiates a circuit breaker maintenance prompt;
wherein Δt is the allowable delay time of the circuit breaker opening and closing circuit of the electrical cabinet.
Further, when the fault recognition module judges that the circuit breaker of the electric cabinet has no fault, the circuit breaker monitoring module sets the delay time Deltat 'of the circuit breaker of the electric cabinet to be the time between the time point tc and the time point of the circuit breaker of the electric cabinet, and the circuit breaker monitoring module obtains the sensitivity of the circuit breaker of the electric cabinet according to the delay time Deltat' of the circuit breaker of the electric cabinet and the signal intensity Du of the time point tc on a time axis by referring to a time sequence signal,
if Du < Dmin, the circuit breaker monitoring module obtains a first circuit breaker sensitivity V1=β1× (Δt/Δt')× (Dmin-Du)/Dmin of the electrical cabinet;
if Du > Dmax, the circuit breaker monitoring module obtains a circuit breaker second sensitivity V2=β2× (Δt/Δt')× (Du-Dmax)/Dmax of the electrical cabinet;
and beta 1 is a first amplification factor of the circuit breaker sensitivity of the electric cabinet preset by the circuit breaker monitoring module, beta 2 is a second amplification factor of the circuit breaker sensitivity of the electric cabinet preset by the circuit breaker monitoring module, and beta 1 is less than or equal to 0.8xbeta 2.
Further, the circuit breaker monitoring module obtains the residual use times M of the circuit breaker of the electric cabinet in real time according to the sensitivity of the circuit breaker of the electric cabinet, wherein,
if V 'is not less than V0, the circuit breaker monitoring module obtains the residual use times M= [ M0-ln (M0×V0/V') ] of the circuit breaker of the electric cabinet;
if V ' < V0, the circuit breaker monitoring module obtains the residual use times M= [ M0-M0× (|V ' -V0|/V ') 0.5 ] ；
Wherein V '=0.5× (v1+v2) is set, in the above formula, v1=v2= infinity is set if the signal strength Du of the reference timing signal at a certain point in time is less than Dmin or greater than Dmax, v1=0.5xv 0 is set if the signal strength Du of the reference timing signal at a certain point in time is less than Dmin and greater than Dmax is set if the signal strength Du of the reference timing signal at a certain point in time is greater than Dmax, v2=0.5xv 0 is set if the signal strength Du of the reference timing signal at a certain point in time is greater than Dmax and the signal strength Du of the reference timing signal at a certain point in time is less than Dmin, M0 is the number of times the circuit breaker is designed to be used for the electric cabinet, V0 is the standard value of the sensitivity of the circuit breaker of the electric cabinet preset by the circuit breaker monitoring module, [ M0-ln (m0×v0/V') ]Represents rounding M0-ln (M0×V0/V '), [ M0-M0× (|V0 ') ] '-V0|/V’） 0.5 ]Represents a pair M0-M0× (|V '-V0|/V') 0.5 And (5) rounding.
Compared with the prior art, the invention has the beneficial effects that the signal conversion unit is arranged, so that the current signals of all area loops of the electrical cabinet can be converted into digital signals in real time and transmitted to the upper computer, the operation condition of the electrical cabinet is visualized, the real-time test of the electrical cabinet is realized, and a plurality of signal conversion modules are connected to different areas of the electrical cabinet, so that the fault area can be quickly locked when the operation of the electrical cabinet is abnormal, the maintenance range can be reduced, and the maintenance rate of the fault loop can be further improved; the invention is provided with the universal meter, can detect the electric leakage condition of the electric cabinet shell in real time without power failure, and is provided with the insulation temperature sensor, so that the temperature of the electric cabinet shell can be obtained in real time without being influenced by the electric leakage of the electric cabinet shell, and further, the fire disaster caused by the overhigh temperature of the electric cabinet shell during the electric leakage of the electric cabinet shell is avoided.
In particular, when the interaction function of the electrical cabinet is judged to be faulty, the fault area of the interaction function of the electrical cabinet is judged by the signal intensity of the second response signal of the input circuit of the electrical energy distribution system of the electrical cabinet, and when the signal intensity of the second response signal is more than or equal to the signal intensity of the adjusted reference digital signal, the input circuit of the electrical energy distribution system of the electrical cabinet can be judged to be faulty, and further the output circuit of the electrical energy distribution system of the electrical cabinet can be judged to be faulty, so that the fault area is reduced for the first time.
Particularly, when the region with the fault of the interaction function of the electrical cabinet is locked as the output circuit of the electrical energy distribution system of the electrical cabinet, the fault region of the output circuit is further obtained through the signal intensity of the first response signal, when the signal intensity of the first response signal is smaller than a preset value, the fault of the total output end of the output circuit of the electrical energy distribution system of the electrical cabinet can be judged, and when the signal intensity of the first response signal is larger than the preset value, the fault of one output branch or a plurality of output branches of the output circuit of the electrical energy distribution system of the electrical cabinet can be judged, so that the locking range of the fault region of the electrical cabinet is further reduced.
Particularly, when the fault area of the output circuit of the electric energy distribution system of the electric cabinet is judged to be the output branches, the response signal intensity of the output branches is obtained respectively to check the output branches, so that the locking range of the fault area is further reduced, the number of circuit checks of the electric cabinet is greatly reduced, and the overhaul difficulty of the electric cabinet is reduced.
Particularly, when the leakage voltage is large and the temperature of the electrical cabinet shell is high, the electrical cabinet is easy to generate fire, the possibility of fire occurrence is prejudged by setting the highest threshold value of the electrical cabinet temperature, and when the electrical cabinet shell is leaked, the fire early warning prompt of the alarm unit is classified by the comparison result of the real-time temperature of the electrical cabinet shell and the highest threshold value of the electrical cabinet temperature and the magnitude of the leakage voltage, so that an maintainer can reasonably judge the risk degree of the current electrical cabinet.
Particularly, when the power supply voltage of the electric cabinet is over-voltage or under-voltage, the circuit in the electric cabinet is timely opened and closed to protect the electric cabinet.
In particular, the invention introduces the parameter of the sensitivity of the circuit breaker according to the delay time of the circuit breaking of the circuit breaker, and the first amplification factor of the sensitivity of the circuit breaker of the electric cabinet is smaller than the second amplification factor of the sensitivity of the circuit breaker of the electric cabinet because the risk of short-time overvoltage is higher than the risk of short-time undervoltage, so that the safety detection of the circuit of the electric cabinet can be more reasonable, and the safety test result of the electric cabinet has more reference significance.
Drawings
FIG. 1 is a schematic diagram of a system for a functional test stand for an electrical cabinet with real-time data acquisition in an embodiment of the invention;
FIG. 2 is a schematic diagram of a signal processing unit architecture of an electrical cabinet functional test stand with real-time data acquisition according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a top rack of an electrical cabinet functional test stand with real-time data acquisition according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of an electrical cabinet functional test stand with real-time data acquisition according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a schematic diagram of an electrical cabinet functional test stand system with real-time data acquisition according to an embodiment of the present invention is shown, where the electrical cabinet functional test stand includes:
the signal processing unit comprises a plurality of signal conversion modules for converting current signals into digital signals in real time and an output current integration module which is respectively connected with each output branch of the electric energy distribution system of the electric cabinet so as to integrate the output current signals of each output branch of the electric energy distribution system in real time;
the contact unit is connected with the signal processing unit and comprises a plurality of contactors respectively connected with each output branch of the electric energy distribution system of the electric cabinet, and each contactor is used for controlling the on-off between each output branch of the electric energy distribution system and the signal processing unit;
The universal meter is connected with the electrical cabinet shell and used for acquiring the leakage voltage of the electrical cabinet shell in real time and transmitting the leakage voltage to the upper computer;
the insulation temperature sensor is connected with the electrical cabinet shell and used for acquiring the temperature of the electrical cabinet shell in real time and transmitting the temperature to the upper computer;
the alarm unit is connected with the upper computer and used for initiating an overhaul prompt of an electrical cabinet area;
the upper computer includes:
the fault identification module is connected with the signal processing unit and used for judging whether the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity of the reference digital signal acquired by the first signal conversion module connected with the input end of the electrical cabinet and the signal intensity of the first response signal acquired by the second signal conversion module connected with the output current integration module;
the fault area judging module is connected with the fault identification module and is used for judging an area with fault of the interaction function of the electrical cabinet according to comparison results of the response signal intensity obtained by each signal conversion module and the signal intensity of the reference digital signal;
a signal timing recording module connected to the fault recognition module, which obtains the time sequence of the reference digital signal to form a reference timing signal and obtains the time sequence of the first response signal to form a first response timing signal;
The circuit breaker monitoring module is connected with the signal time sequence recording module and used for acquiring the sensitivity of the circuit breaker of the electric cabinet according to the delay time of the circuit breaker of the electric cabinet;
and the electrical cabinet shell monitoring module is connected with the universal meter and used for judging whether the electrical cabinet shell is leaked or not according to the display voltage of the universal meter.
Referring to fig. 2, a schematic diagram of an architecture of a signal processing unit of an electrical cabinet functional test stand with real-time data acquisition according to an embodiment of the present invention is shown, where the signal processing unit includes a first signal conversion module connected to an input end of the electrical cabinet, an output current signal integration module connected to each output branch of the electrical cabinet, a second signal conversion module connected to the output current signal integration module, a third signal conversion module connected to an input circuit of an electrical energy distribution system of the electrical cabinet, and a fourth signal conversion module connected to each output branch of the electrical energy distribution system of the electrical cabinet through a plurality of contactors.
Referring to fig. 3, which is a schematic diagram of an upper rack of an electrical cabinet function test stand with real-time data acquisition, the upper rack of the embodiment of the invention includes a fault identification module connected to the signal processing unit, a fault area determination module connected to the fault identification module, an electrical cabinet enclosure monitoring module connected to the multimeter for determining whether an electrical leakage occurs in an electrical cabinet enclosure according to a display voltage of the multimeter, a signal timing recording module connected to the electrical cabinet enclosure monitoring module and the fault identification module, respectively, and a circuit breaker monitoring module connected to the signal timing recording module, wherein the fault identification module is used for determining whether a fault exists in an electrical cabinet interaction function according to a comparison result of a signal intensity of a reference digital signal acquired by the first signal conversion module and a signal intensity of a first response signal, the fault area determination module is used for determining whether a fault exists in an electrical cabinet interaction function according to a comparison result of a response signal intensity acquired by each of the signal conversion module and the signal intensity of the reference digital signal, the electrical cabinet enclosure monitoring module is used for determining whether an electrical leakage occurs in the electrical cabinet enclosure according to the display voltage of the multimeter, the signal timing recording module is used for recording a time sequence of the signal at which the signal intensity is the highest in a time sequence of the reference signal intensity, and the time sequence is the time sequence of the signal intensity is the highest when the signal intensity is the first time sequence or the highest time sequence is the time sequence of the reference time sequence is the highest, the fault identification module is used for judging whether the circuit breaker of the electric cabinet has faults or not according to the signal intensity of any time point in a preset time period taking the time point as a time starting point on the same time axis as the reference time sequence signal, and the circuit breaker monitoring module is used for acquiring the sensitivity of the circuit breaker of the electric cabinet according to the delay time of the circuit breaker of the electric cabinet to open a circuit.
Referring to fig. 4, a schematic diagram of an electrical cabinet functional test stand with real-time data acquisition is shown in an embodiment of the present invention, the electrical cabinet functional test stand includes a signal processing unit, the signal processing unit includes a first signal conversion module 101 connected to an input end 204 of an electrical cabinet, the first signal conversion module is configured to convert a total input current signal of the input end of the electrical cabinet into a reference digital signal in real time, the electrical cabinet functional test stand further includes an output current signal integration module 105 connected to each output branch of the electrical cabinet, and a second signal conversion module 102 connected to the output current signal integration module, the output current signal integration module is configured to integrate output current signals of each output branch of the electrical cabinet in real time, the second signal conversion module is configured to convert current signals obtained by integrating the output current signal integration module into digital signals to form a first response signal, the signal processing unit further includes a third signal conversion module 103 connected to an input circuit 205 of an electrical energy distribution system 202 of the electrical cabinet, the third signal conversion module is configured to convert the input circuit current signals of the electrical energy distribution system of the electrical cabinet into second response signals, the second response signal conversion module includes a plurality of electrical converters connected to each output circuit of electrical distribution system of the electrical cabinet, and each electrical distribution system is configured to output electrical system of the electrical cabinet, and the fourth response signal conversion module is configured to output electrical system output the electrical signal distribution system is connected to each output circuit of the electrical branch of the electrical system, respectively, and the fourth signal conversion module is configured to output electrical system is connected to the electrical system, and the electrical distribution system is configured to output to the electrical system.
With continued reference to fig. 4, the electrical cabinet functional test stand further includes a contact unit, where the contact unit includes a first contactor connected to the third signal conversion module and a plurality of contactors 106 connected to the fourth signal conversion module and used for controlling on-off between each output branch of the electrical power distribution system of the electrical cabinet and the signal processing unit; the electrical cabinet function test stand further comprises a universal meter 107 connected with the electrical cabinet housing 203 and used for detecting the leakage condition of the electrical cabinet housing, an insulation temperature sensor 108 connected with the electrical cabinet housing 203 and used for acquiring the temperature of the electrical cabinet housing in real time, and an upper computer 109 respectively connected with the first signal conversion module, the second signal conversion module, the third signal conversion module, the fourth signal conversion module, the universal meter and the insulation temperature sensor, wherein the fault identification module judges whether a fault exists in the circuit breaker 201 of the electrical cabinet according to the signal intensity of any time point in a preset time period taking the time point as a time starting point on the same time axis as the reference time sequence signal by a first response time sequence signal; the electrical cabinet functional test board further comprises an alarm unit 110 connected with the upper computer and used for generating an electrical cabinet area overhaul prompt and a fire disaster early warning prompt.
Specifically, the invention is provided with the signal conversion unit, and can convert the current signals of all area loops of the electrical cabinet into digital signals in real time and transmit the digital signals to the upper computer so as to visualize the operation condition of the electrical cabinet and realize the real-time test of the electrical cabinet; the invention is provided with the universal meter, can detect the electric leakage condition of the electric cabinet shell in real time without power failure, and is provided with the insulation temperature sensor, so that the temperature of the electric cabinet shell can be obtained in real time without being influenced by the electric leakage of the electric cabinet shell, and further, the fire disaster caused by the overhigh temperature of the electric cabinet shell during the electric leakage of the electric cabinet shell is avoided.
The first signal conversion module converts the total input current signal of the input end of the electrical cabinet into a reference digital signal in real time and sends the reference digital signal to the fault recognition module, the output current signal integration module integrates the output current signals of all output branches of the electrical energy distribution system of the electrical cabinet in real time to generate a first current signal to be detected, the second signal conversion module converts the first current signal to be detected into a first response signal and sends the first response signal to the fault recognition module, the fault recognition module judges whether the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity D0 of the reference digital signal and the signal intensity D1 of the first response signal, wherein,
If D1 < (1-eta 1) multiplied by D0, the fault identification module judges that the interaction function of the electric cabinet has faults;
if D1 is more than or equal to (1-eta 1) multiplied by D0, the fault identification module judges that the interaction function of the electric cabinet has no fault;
wherein η1 is a first standard value of the power design loss rate.
Specifically, the present embodiment does not limit the electric power design loss rate first standard value, and the embodiment of the present invention preferably uses the electric power design loss rate first standard value η1=0.15.
When the fault identification module judges that the interaction function of the electrical cabinet has faults, a first contactor connected with an input circuit of an electric energy distribution system of the electrical cabinet is connected, a third signal conversion module connected with the first contactor converts an input circuit current signal of the electric energy distribution system of the electrical cabinet into a second response signal, the fault area judgment module judges the area where the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity D0 of the reference digital signal and the signal intensity D2 of the second response signal, wherein,
if D2 < (1-eta 2) multiplied by D0, the fault area judging module judges that the area with fault of the interaction function of the electrical cabinet is an input circuit of an electrical energy distribution system of the electrical cabinet, and the alarm unit initiates an input circuit overhaul prompt;
If D2 is more than or equal to (1-eta 2) multiplied by D0, the fault area judging module judges that the area with fault of the interaction function of the electrical cabinet is an electric energy distribution system output circuit of the electrical cabinet;
wherein eta 2 is a second standard value of the electric energy design loss rate, and eta 2 is smaller than eta 1.
Specifically, the present embodiment does not limit the electric power design loss rate second standard value, and the present embodiment prefers the electric power design loss rate second standard value η2=0.1; the input circuit of the electric energy distribution system of the electric cabinet in the implementation is a circuit from the input end of the electric cabinet to the input point of the electric cabinet distribution system.
Specifically, when the interaction function of the electric cabinet is judged to be faulty, the fault area of the interaction function of the electric cabinet is judged through the signal intensity of the second response signal of the input circuit of the electric energy distribution system of the electric cabinet, and when the signal intensity of the second response signal is more than or equal to the signal intensity of the adjusted reference digital signal, the input circuit of the electric energy distribution system of the electric cabinet can be judged to be faulty, and further the output circuit of the electric energy distribution system of the electric cabinet can be judged to be faulty, so that the fault area is reduced for the first time.
When the fault area judging module judges that the area with the fault of the interaction function of the electrical cabinet is the output circuit of the electrical energy distribution system of the electrical cabinet, the fault area judging module acquires the fault area of the output circuit of the electrical energy distribution system of the electrical cabinet according to the signal intensity D1 of the first response signal,
If D1 is smaller than alpha multiplied by D0, the fault area judging module acquires a fault area of an output circuit of an electric energy distribution system of the electric cabinet as a total output end, and the alarm unit initiates a circuit overhaul prompt of the total output end of the output circuit;
if D1 is more than or equal to alpha multiplied by D0, the fault area judging module acquires a fault area of an output circuit of an electric energy distribution system of the electric cabinet as each output branch;
and alpha is an electric energy acquisition adjustment coefficient of the total output end of the output circuit of the electric energy distribution system of the electric cabinet.
Specifically, the present embodiment does not limit the power acquisition adjustment coefficient of the total output end of the power distribution system output circuit of the electric cabinet, and it is preferable that α=0.9.
Specifically, when the region with the fault of the interaction function of the electrical cabinet is locked as the output circuit of the electrical energy distribution system of the electrical cabinet, the fault region of the output circuit is further obtained through the signal intensity of the first response signal, when the signal intensity of the first response signal is smaller than a preset value, the fault of the total output end of the output circuit of the electrical energy distribution system of the electrical cabinet can be judged, and when the signal intensity of the first response signal is larger than the preset value, the fault of one output branch or a plurality of output branches of the output circuit of the electrical energy distribution system of the electrical cabinet can be judged, so that the locking range of the fault region of the electrical cabinet is further reduced.
When the fault area of the output circuit of the electric energy distribution system of the electric cabinet is obtained by the fault area judging module and is the output branches, each contactor connected with each output branch is respectively communicated, the fourth signal converting module respectively connected with each contactor converts the current signals of the first output branch, the second output branch, … and the nth output branch into third response signals, the fourth response signals are …, the n+2 response signals are transmitted to the fault area judging module, n is the number of output branches of the output circuit of the electric energy distribution system of the electric cabinet, the fault area judging module judges whether the ith-2 output branch has faults according to the signal intensity di of the ith response signals, i=3, 4, … and n+2,
if di < (1-eta 2) multiplied by ai multiplied by D1, the fault area judging module judges that the i-2 output branch has faults, and the alarm unit initiates an i-2 output branch overhaul prompt;
if di is more than or equal to (1-eta 2) xai x D1, the fault area judging module judges that the i-2 output branch has no fault;
wherein ai is the electric energy distribution ratio of the electric energy distribution system of the electric cabinet to the i-2 output branch.
Specifically, when the fault area of the output circuit of the electric energy distribution system of the electric cabinet is judged to be the output branches, the response signal intensity of the output branches is obtained respectively to check the output branches, so that the locking range of the fault area is further reduced, the number of circuit checks of the electric cabinet is greatly reduced, and the overhaul difficulty of the electric cabinet is reduced.
When the fault identification module judges that the interaction function of the electric cabinet has no fault, the electric cabinet shell monitoring module obtains the display voltage U of the universal meter, and the electric cabinet shell monitoring module judges whether the electric cabinet shell has electric leakage or not according to the display voltage U of the universal meter, wherein,
if U is more than or equal to U0, the electric cabinet shell monitoring module judges that electric leakage occurs in the electric cabinet shell, and the alarm unit initiates an electric cabinet electric leakage alarm;
if U is less than U0, the electric cabinet shell monitoring module judges that electric leakage does not occur in the electric cabinet shell;
and U0 is a maximum threshold value of the leakage voltage of the electrical cabinet preset by the electrical cabinet shell monitoring module.
Specifically, the present embodiment is not limited to the maximum threshold value of the electrical cabinet leakage voltage, and is preferably u0=30v.
When the electric cabinet shell monitoring module judges that electric cabinet shell leaks electricity, the insulating temperature sensor connected with the electric cabinet shell starts to operate, the insulating temperature sensor transmits the electric cabinet shell temperature Tw to the electric cabinet shell monitoring module after acquiring the stable electric cabinet shell temperature Tw, the electric cabinet shell monitoring module judges whether the alarm unit initiates fire early warning prompt according to the electric cabinet shell temperature Tw and the display voltage U of the universal meter, wherein,
If U0 is less than or equal to U2 XU 0 and Tw is less than T0, the electric cabinet shell monitoring module judges that the alarm unit does not initiate fire early warning prompt;
if U0 is less than or equal to U2 XU 0 and Tw is more than or equal to T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a primary fire early warning prompt;
if U is more than or equal to 2 XU 0 and Tw is less than T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a primary fire early warning prompt;
if U is more than or equal to 2 XU 0 and Tw is more than or equal to T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a secondary fire early warning prompt;
and T0 is a highest threshold value of the temperature of the electrical cabinet preset by the electrical cabinet shell monitoring module.
Specifically, the present embodiment is not limited to the highest threshold value of the electrical cabinet temperature, and is preferably t0=45℃.
Specifically, when the leakage voltage is large and the temperature of the electrical cabinet shell is high, the electrical cabinet is easy to generate fire, the possibility of fire occurrence is pre-judged by setting the highest threshold value of the electrical cabinet temperature, and when the electrical cabinet shell is leaked, the fire early warning prompt of the alarm unit is classified by the comparison result of the real-time temperature of the electrical cabinet shell and the highest threshold value of the electrical cabinet temperature and the magnitude of the leakage voltage, so that an maintainer can reasonably judge the risk degree of the current electrical cabinet.
The signal timing recording module obtains a time sequence of a reference digital signal to form a reference timing signal when the electric cabinet housing monitoring module judges that no electric leakage occurs, obtains a time sequence of the first response signal to form a first response timing signal, presets a lowest threshold value of the reference timing signal strength as Dmin, presets a highest threshold value of the reference timing signal strength as Dmax, and judges whether a circuit breaker of the electric cabinet has a fault according to the signal strength Dc of the first response timing signal at any time point in a period from a time point tc to a time point tc+ [ delta ] t when the signal strength Du of a certain time point tc of the reference timing signal on a time axis is smaller than Dmin or larger than Dmax,
if Dc=0, the fault identification module judges that the circuit breaker of the electrical cabinet has no fault;
if Dc is not equal to 0, the fault identification module judges that the circuit breaker of the electric cabinet has faults, and the alarm unit initiates a circuit breaker maintenance prompt;
wherein Δt is the allowable delay time of the circuit breaker opening and closing circuit of the electrical cabinet.
Specifically, when overvoltage or undervoltage occurs to the supply voltage of the electrical cabinet, the circuit in the electrical cabinet is timely opened and closed to protect the electrical cabinet.
When the fault recognition module judges that the circuit breaker of the electric cabinet has no fault, the circuit breaker monitoring module sets the delay time Deltat 'of the circuit breaker of the electric cabinet to be the time between the time point tc and the time point of the circuit breaker of the electric cabinet, and the circuit breaker monitoring module obtains the sensitivity of the circuit breaker of the electric cabinet according to the delay time Deltat' of the circuit breaker of the electric cabinet and the signal strength Du of the time point tc on a time axis by referring to a time sequence signal,
if Du < Dmin, the circuit breaker monitoring module obtains a first circuit breaker sensitivity V1=β1× (Δt/Δt')× (Dmin-Du)/Dmin of the electrical cabinet;
if Du > Dmax, the circuit breaker monitoring module obtains a circuit breaker second sensitivity V2=β2× (Δt/Δt')× (Du-Dmax)/Dmax of the electrical cabinet;
and beta 1 is a first amplification factor of the circuit breaker sensitivity of the electric cabinet preset by the circuit breaker monitoring module, beta 2 is a second amplification factor of the circuit breaker sensitivity of the electric cabinet preset by the circuit breaker monitoring module, and beta 1 is less than or equal to 0.8xbeta 2.
Specifically, the present embodiment is not limited to the first amplification factor of the circuit breaker sensitivity of the electrical cabinet and the second amplification factor of the circuit breaker sensitivity of the electrical cabinet, and is preferably β1=10 and β2=6.
Specifically, the parameter of the sensitivity of the circuit breaker is introduced according to the delay time of the circuit breaking of the circuit breaker, and the risk of short-time overvoltage is higher than the risk of short-time undervoltage, so that the first amplification factor of the sensitivity of the circuit breaker of the electric cabinet is smaller than the second amplification factor of the sensitivity of the circuit breaker of the electric cabinet, the safety detection of the circuit of the electric cabinet can be more reasonable, and the safety test result of the electric cabinet has more reference significance.
The circuit breaker monitoring module acquires the residual use times M of the circuit breaker of the electric cabinet in real time according to the sensitivity of the circuit breaker of the electric cabinet, wherein,
if V 'is not less than V0, the circuit breaker monitoring module obtains the residual use times M= [ M0-ln (M0×V0/V') ] of the circuit breaker of the electric cabinet;
if V ' < V0, the circuit breaker monitoring module obtains the residual use times M= [ M0-M0× (|V ' -V0|/V ') 0.5 ]；
Wherein V '=0.5× (v1+v2) is set, in the above formula, v1=v2= infinity is set if the signal strength Du of the reference timing signal at a certain point in time is less than Dmin or greater than Dmax, v1=0.5xv 0 is set if the signal strength Du of the reference timing signal at a certain point in time is less than Dmin and greater than Dmax is set if the signal strength Du of the reference timing signal at a certain point in time is greater than Dmax, v2=0.5xv 0 is set if the signal strength Du of the reference timing signal at a certain point in time is greater than Dmax and the signal strength Du of the reference timing signal at a certain point in time is less than Dmin, M0 is the number of times the circuit breaker is designed to be used for the electric cabinet, V0 is the standard value of the sensitivity of the circuit breaker of the electric cabinet preset by the circuit breaker monitoring module, [ M0-ln (m0×v0/V') ]Represents rounding M0-ln (M0×V0/V') 0.5 ]Represents a pair M0-M0× (|V '-V0|/V') 0.5 And (5) rounding.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An electrical cabinet functional test board with real-time data acquisition, which is characterized by comprising,
the signal processing unit comprises a plurality of signal conversion modules for converting current signals into digital signals in real time and an output current integration module which is respectively connected with each output branch of the electric energy distribution system of the electric cabinet so as to integrate the output current signals of each output branch of the electric energy distribution system in real time;
The contact unit is connected with the signal processing unit and comprises a plurality of contactors respectively connected with each output branch of the electric energy distribution system of the electric cabinet, and each contactor is used for controlling the on-off between each output branch of the electric energy distribution system and the signal processing unit;
the universal meter is connected with the electrical cabinet shell and used for acquiring the leakage voltage of the electrical cabinet shell in real time and transmitting the leakage voltage to the upper computer;
the insulation temperature sensor is connected with the electrical cabinet shell and used for acquiring the temperature of the electrical cabinet shell in real time and transmitting the temperature to the upper computer;
the upper computer includes:
the fault identification module is connected with the signal processing unit and used for judging whether the interaction function of the electrical cabinet has faults according to the comparison result of the signal intensity of the reference digital signal acquired by the first signal conversion module connected with the input end of the electrical cabinet and the signal intensity of the first response signal acquired by the second signal conversion module connected with the output current integration module;
a fault region judgment module connected with the fault recognition module, which judges the region where the interaction function of the electrical cabinet is faulty according to the comparison result of the response signal intensity obtained by each signal conversion module and the signal intensity of the reference digital signal, wherein the fault region judgment module obtains whether the i-2 th output branch has a fault or not according to the signal intensity di of the i-th response signal, i=3, 4, …, n+2, if di < (1-2) ×d1, the fourth signal conversion module connected with each contactor respectively converts the current signal of the first output branch, the second output branch, …, the n-th output branch into a third response signal, the fourth response signal, …, the n+2-th response signal is transmitted to the fault region judgment module, the n is the number of output branches of the electrical energy distribution system output circuit of the electrical cabinet, the fault region judgment module judges whether the i-2 th output branch has a fault or not according to the signal intensity di of the i-response signal, if i=3, 4, …, n+2, i < (1-2) ×d1), the n+2, the n-th output branch has a fault rate of the electrical distribution system output circuit, if the i-2 is not equal to the signal of the i-2 th response signal, and if the i-2 th output branch has a fault rate of the electrical distribution system is equal to the signal, the i-2, the n+2 is equal to the signal of the electrical distribution system output loss, and if the i-1 is equal to the signal;
A signal timing recording module connected to the fault recognition module, which obtains the time sequence of the reference digital signal to form a reference timing signal and obtains the time sequence of the first response signal to form a first response timing signal;
the circuit breaker monitoring module is connected with the signal time sequence recording module and used for acquiring the sensitivity of the circuit breaker of the electric cabinet according to the delay time of the circuit breaker of the electric cabinet;
and the electrical cabinet shell monitoring module is connected with the universal meter and used for judging whether the electrical cabinet shell is leaked or not according to the display voltage of the universal meter.
2. The electrical cabinet function test stand with real-time data acquisition according to claim 1, wherein the first signal conversion module converts a total input current signal of an input end of the electrical cabinet into a reference digital signal in real time and sends the reference digital signal to the fault recognition module, the output current signal integration module integrates output current signals of all output branches of an electrical energy distribution system of the electrical cabinet in real time to generate a first current signal to be detected, the second signal conversion module converts the first current signal to be detected into a first response signal and sends the first response signal to the fault recognition module, the fault recognition module determines whether a fault exists in an interactive function of the electrical cabinet according to a comparison result of a signal intensity D0 of the reference digital signal and a signal intensity D1 of the first response signal,
If D1 < (1-eta 1) multiplied by D0, the fault identification module judges that the interaction function of the electric cabinet has faults;
if D1 is more than or equal to (1-eta 1) multiplied by D0, the fault identification module judges that the interaction function of the electric cabinet has no fault;
wherein η1 is a first standard value of the power design loss rate.
3. The electrical cabinet function test stand with real-time data acquisition according to claim 2, further comprising an alarm unit connected to the upper computer, the alarm unit being configured to initiate an electrical cabinet area inspection prompt, the fault recognition module determining that a fault exists in an interactive function of the electrical cabinet, the first contactor connected to an input circuit of an electrical power distribution system of the electrical cabinet being turned on, the third signal conversion module connected to the first contactor converting an input circuit current signal of the electrical power distribution system of the electrical cabinet into a second response signal, the fault area determination module determining that a fault exists in the interactive function of the electrical cabinet based on a comparison result of a signal intensity D0 of a reference digital signal and a signal intensity D2 of the second response signal, wherein,
if D2 < (1-eta 2) multiplied by D0, the fault area judging module judges that the area with fault of the interaction function of the electrical cabinet is an electrical energy distribution system input circuit of the electrical cabinet, and the alarm unit initiates an electrical energy distribution system input circuit overhaul prompt;
If D2 is more than or equal to (1-eta 2) multiplied by D0, the fault area judging module judges that the area with fault of the interaction function of the electrical cabinet is an electric energy distribution system output circuit of the electrical cabinet;
wherein eta 2 is less than eta 1.
4. The electrical cabinet functional test stand with real-time data acquisition as claimed in claim 3, wherein the failure area determination module acquires a failure area of the electrical energy distribution system output circuit of the electrical cabinet based on the signal intensity D1 of the first response signal when the failure area determination module determines that the area where the electrical cabinet interaction function fails is the electrical energy distribution system output circuit of the electrical cabinet, wherein,
if D1 is smaller than alpha multiplied by D0, the fault area judging module acquires a fault area of an output circuit of the electric energy distribution system of the electric cabinet as a total output end, and the alarm unit initiates a circuit overhaul prompt of the total output end of the output circuit of the electric energy distribution system;
if D1 is more than or equal to alpha multiplied by D0, the fault area judging module acquires a fault area of an output circuit of an electric energy distribution system of the electric cabinet as each output branch;
and alpha is an electric energy acquisition adjustment coefficient of the total output end of the output circuit of the electric energy distribution system of the electric cabinet.
5. The electrical cabinet functional test stand with real-time data acquisition as claimed in claim 4, wherein the electrical cabinet housing monitoring module determines whether electrical cabinet housing is leaking according to the display voltage U of the multimeter when the fault recognition module determines that there is no fault in the interactive function of the electrical cabinet, wherein,
If U is more than or equal to U0, the electric cabinet shell monitoring module judges that electric leakage occurs in the electric cabinet shell, and the alarm unit initiates an electric cabinet electric leakage alarm;
if U is less than U0, the electric cabinet shell monitoring module judges that electric leakage does not occur in the electric cabinet shell;
and U0 is a maximum threshold value of the leakage voltage of the electrical cabinet preset by the electrical cabinet shell monitoring module.
6. The electrical cabinet functional test stand with real-time data acquisition according to claim 5, wherein the electrical cabinet housing monitoring module determines whether the alarm unit initiates a fire warning prompt according to the electrical cabinet housing temperature Tw acquired by the insulation temperature sensor and the display voltage U of the multimeter when the electrical cabinet housing monitoring module determines that electrical cabinet housing is leaking,
if U0 is less than or equal to U2 XU 0 and Tw is less than T0, the electric cabinet shell monitoring module judges that the alarm unit does not initiate fire early warning prompt;
if U0 is less than or equal to U2 XU 0 and Tw is more than or equal to T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a primary fire early warning prompt;
if U is more than or equal to 2 XU 0 and Tw is less than T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a primary fire early warning prompt;
If U is more than or equal to 2 XU 0 and Tw is more than or equal to T0, the electric cabinet shell monitoring module judges that the alarm unit initiates a secondary fire early warning prompt;
and T0 is a highest threshold value of the temperature of the electrical cabinet preset by the electrical cabinet shell monitoring module.
7. The electrical cabinet functional test stand with real-time data acquisition according to claim 6, wherein the electrical cabinet housing monitoring module acquires a time series of reference digital signals to form a reference time series signal, acquires a time series of the first response signals to form a first response time series signal, the signal time series recording module presets a reference time series signal strength minimum threshold value Dmin, presets a reference time series signal strength maximum threshold value Dmax, and when the signal strength Du of a reference time series signal at a certain time point tc on a time axis is smaller than Dmin or larger than Dmax, the fault recognition module determines whether a fault exists in a circuit breaker of the electrical cabinet according to the signal strength Dc of the first response time series signal at any time point in a period from the time point tc to the time point tc+ [ delta ] t, wherein,
if Dc=0, the fault identification module judges that the circuit breaker of the electrical cabinet has no fault;
If Dc is not equal to 0, the fault identification module judges that the circuit breaker of the electric cabinet has faults, and the alarm unit initiates a circuit breaker maintenance prompt;
wherein Δt is the allowable delay time of the circuit breaker opening and closing circuit of the electrical cabinet.
8. The electrical cabinet functional test stand with real-time data acquisition according to claim 7, wherein the fault recognition module determines that there is no fault in the circuit breaker of the electrical cabinet, the circuit breaker monitoring module sets a delay time Δt 'of the circuit breaker opening circuit of the electrical cabinet as a time period from the time point tc to the time point of the circuit breaker opening circuit of the electrical cabinet, the circuit breaker monitoring module acquires the circuit breaker sensitivity of the electrical cabinet based on the delay time Δt' of the circuit breaker opening circuit of the electrical cabinet and the signal strength Du of the time point tc on a time axis with reference to a time sequence signal,
if Du < Dmin, the circuit breaker monitoring module obtains a first circuit breaker sensitivity V1=β1× (Δt/Δt')× (Dmin-Du)/Dmin of the electrical cabinet;
if Du > Dmax, the circuit breaker monitoring module obtains a circuit breaker second sensitivity V2=β2× (Δt/Δt')× (Du-Dmax)/Dmax of the electrical cabinet;
and beta 1 is a first amplification factor of the circuit breaker sensitivity of the electric cabinet preset by the circuit breaker monitoring module, beta 2 is a second amplification factor of the circuit breaker sensitivity of the electric cabinet preset by the circuit breaker monitoring module, and beta 1 is less than or equal to 0.8xbeta 2.
9. The electrical cabinet functional test stand with real-time data acquisition according to claim 8, wherein the circuit breaker monitoring module acquires the number of remaining uses M of the circuit breaker of the electrical cabinet in real time according to the circuit breaker sensitivity of the electrical cabinet, wherein,
if V 'is not less than V0, the circuit breaker monitoring module obtains the residual use times M= [ M0-ln (M0×V0/V') ] of the circuit breaker of the electric cabinet;
if V ' < V0, the circuit breaker monitoring module obtains the residual use times M= [ M0-M0× (|V ' -V0|/V ') 0.5 ]；
Wherein, setting V' =0.5× (v1+v2), in the above formula, if the signal intensity Du of the reference timing signal at any time point on the time axis is less than Dmin or greater than Dmax, settingV1=v2= infinity, if the signal strength Du of the reference timing signal at a certain time point is not less than Dmin and the signal strength Du of the reference timing signal at a certain time point is greater than Dmax, v1=0.5xv0 is set, if the signal strength Du of the reference timing signal at a certain time point is not greater than Dmax and the signal strength Du of the reference timing signal at a certain time point is less than Dmin, v2=0.5xv0 is set, M0 is the number of times of design use of the circuit breaker of the electric cabinet, V0 is the standard value of sensitivity of the circuit breaker of the electric cabinet preset by the circuit breaker monitoring module, [ M0-ln (m0×v0/V') ]Represents rounding M0-ln (M0×V0/V') 0.5 ]Represents a pair M0-M0× (|V '-V0|/V') 0.5 And (5) rounding.
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