CN116526673A - Power distribution cabinet control method and system and electronic equipment thereof - Google Patents
Power distribution cabinet control method and system and electronic equipment thereof Download PDFInfo
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- CN116526673A CN116526673A CN202310507293.1A CN202310507293A CN116526673A CN 116526673 A CN116526673 A CN 116526673A CN 202310507293 A CN202310507293 A CN 202310507293A CN 116526673 A CN116526673 A CN 116526673A
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000009826 distribution Methods 0.000 title claims abstract description 50
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 18
- 238000013461 design Methods 0.000 abstract description 7
- 238000004422 calculation algorithm Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention provides a control method of a power distribution cabinet, a system thereof and electronic equipment, which comprise the steps of collecting three-phase voltage and three-phase line current of a compensation access point and a load end according to a first detection period, calculating to obtain power factors of each phase by utilizing the measured three-phase voltage value and three-phase line current value, calculating to obtain the absolute value of the change rate of the power factors of each phase according to the power factors of each phase, judging whether the absolute value of the change rate of the power factors of each phase is larger than or equal to a first preset threshold value, outputting alarm signals related to power factor fluctuation according to the judgment result, and performing switching operation of a corresponding capacitor compensation device. The method is easy to implement and low in cost, simplifies the problems of three-phase unbalance and power factor fluctuation of an abstract power transmission and distribution system through ingenious design, can effectively detect and timely automatically adjust the problems of three-phase unbalance and power factor fluctuation of the power transmission and distribution system, and greatly expands the application scene of the method.
Description
Technical Field
The invention relates to the technical field of power distribution cabinet control, in particular to a power distribution cabinet control method, a power distribution cabinet control system and electronic equipment.
Background
According to the voltage regulation characteristics in the prior art, the voltage of the system and the reactive power of the system have very close and direct relation because the voltage value of a very large number of nodes or buses in the power distribution system cannot be the same without a point. Therefore, if we want to ensure that the voltage of each node of the whole line can meet the standard of the use requirement, we need to go down from various adjustment modes. The three-phase load unbalance and the power factor fluctuation have a plurality of adverse effects on the power system, at present, the research on the load compensation of the three-phase unbalance and the power factor fluctuation of the power transmission and distribution system is very much focused on the design of a reactive compensation device body, the control strategy and the method of the reactive compensation device, because a plurality of limiting conditions, a plurality of advanced algorithms and control strategies are remained in a theoretical derivation and computer simulation stage, a few field tests can be carried out, a large amount of preparation work is needed, the cost is high, the algorithm is complex, and therefore, a power distribution cabinet control scheme capable of effectively detecting the three-phase unbalance and the power factor fluctuation problem of the power transmission and distribution system and automatically adjusting in time is needed without modeling the complex algorithm is needed.
Accordingly, the prior art is subject to further development.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a power distribution cabinet control method, a power distribution cabinet control system and electronic equipment, so as to solve the problems in the prior art.
To achieve the above technical object, according to a first aspect of the present invention, there is provided a power distribution cabinet control method, including:
the method comprises the steps of collecting three-phase voltage and three-phase line current of a compensation access point and a load end according to a first detection period through a three-phase power monitoring instrument and a three-phase digital display ammeter, calculating to obtain power factors of each phase by using measured three-phase voltage values and three-phase line current values, calculating to obtain absolute values of change rates of the power factors of each phase according to the power factors of each phase, judging whether phases with the absolute values of the change rates of the power factors of each phase being larger than or equal to a first preset threshold value exist in the absolute values of the change rates of the power factors of each phase, outputting alarm signals related to power factor fluctuation according to judgment results, and performing switching operation of a corresponding capacitor compensation device.
Specifically, the method further comprises:
if the absolute value of the change rate of the power factor of each phase is larger than or equal to a first preset threshold value, judging whether the change rate of the power factor of the phase is smaller than or equal to a second preset threshold value, if so, outputting an alarm signal related to abnormal reduction of the power factor, calculating to obtain capacitance compensation capacity according to a first preset power factor compensation value, and throwing the compensation capacity corresponding to the capacitance compensation capacity into the phase.
Specifically, the method further comprises:
and judging whether the change rate of the power factor of the phase is larger than or equal to a third preset threshold value while judging whether the change rate of the power factor of the phase is smaller than or equal to a second preset threshold value, and if so, outputting a signal related to the normal power factor.
Specifically, the method further comprises:
judging whether the absolute value of the change rate of the power factor of each phase is larger than or equal to the first preset threshold value or not, judging whether the phase of which the power factor is smaller than or equal to the fourth preset threshold value exists in the power factor of each phase or not, outputting an alarm signal related to power factor abnormality according to a judging result, and performing switching operation of a corresponding capacitor compensation device.
Specifically, the method further comprises:
if the power factor of each phase is smaller than or equal to the fourth preset threshold value, calculating to obtain capacitance compensation capacity according to the second preset power factor compensation value, and adding the compensation capacity corresponding to the capacitance compensation capacity to the phase.
Specifically, the method further comprises:
the second preset power factor compensation value is the difference value between the first power factor expected value and the phase power factor.
Specifically, the method further comprises:
and when judging whether the absolute value of the change rate of the power factor of each phase is greater than or equal to a first preset threshold value, calculating three voltage effective values by using the measured three phase voltage and three line current instantaneous values, calculating the difference value of the maximum voltage value and the minimum voltage value in the three phase voltages according to the three voltage effective values, judging whether the difference value of the maximum voltage value and the minimum voltage value is greater than or equal to a fifth preset threshold value, and if so, outputting an early warning signal related to three voltage imbalance.
Specifically, the output of the early warning signal related to three voltage imbalances further comprises:
and judging whether the difference value between the maximum voltage value and the minimum voltage value is larger than or equal to a sixth preset threshold value, if so, outputting alarm signals related to serious unbalance of three voltages, and cutting off the power supply of the power distribution cabinet.
According to a second aspect of the present invention, there is provided a power distribution cabinet control system comprising:
the acquisition module comprises a three-phase power monitoring instrument and a three-phase digital display ammeter, is used for acquiring and compensating the three-phase voltage and the three-phase current of the access point and the load end according to a first detection period,
the control module is used for calculating the power factors of each phase by using the measured three-phase voltage values and the three line current values, calculating the absolute value of the change rate of the power factors of each phase according to the power factors of each phase, judging whether the absolute value of the change rate of the power factors of each phase is greater than or equal to a first preset threshold value or not, outputting an alarm signal related to power factor fluctuation according to a judging result, and controlling the execution module to perform switching operation of the corresponding capacitor compensation device;
and the execution module is used for performing switching operation of the corresponding capacitor compensation device.
According to a third aspect of the present invention, there is provided an electronic device comprising:
a memory; and a processor having stored thereon computer readable instructions which when executed by the processor implement the power distribution cabinet control method according to any one of claims 1 to 8.
The beneficial effects of the invention are as follows:
the invention collects three-phase voltage and three-phase line current of a compensation access point and a load end according to a first detection period through a three-phase power monitoring instrument and a three-phase digital display ammeter, calculates each phase power factor by utilizing the measured three-phase voltage value and three line current value, calculates the absolute value of the change rate of each phase power factor according to each phase power factor, judges whether the absolute value of the change rate of each phase power factor is larger than or equal to a first preset threshold value in the absolute value of the change rate of each phase power factor, outputs an alarm signal related to power factor fluctuation according to a judging result, and performs switching operation of a corresponding capacitor compensation device. The method has the advantages of no need of carrying out a large amount of preparation work, easy implementation and low cost, simplifies the problems of three-phase unbalance and power factor fluctuation of an abstract power transmission and distribution system through ingenious design, does not need algorithm modeling, has high reliability of analysis results, can effectively detect and automatically adjust the problems of three-phase unbalance and power factor fluctuation of the power transmission and distribution system in time, and greatly expands the application scene of the method.
Drawings
Fig. 1 is a flowchart of a method for controlling a power distribution cabinet according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control system for a power distribution cabinet according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and based on the embodiments in the present application, other similar embodiments obtained by those skilled in the art without making creative efforts should fall within the scope of protection of the present application. In addition, directional words such as "upper", "lower", "left", "right", and the like, as used in the following embodiments are merely directions with reference to the drawings, and thus, the directional words used are intended to illustrate, not to limit, the invention.
The invention will be further described with reference to the drawings and preferred embodiments.
Referring to fig. 1, the embodiment provides a control method for a power distribution cabinet, which includes:
and S100, acquiring three-phase voltage and three-phase line current of the compensation access point and the load end according to a first detection period through a three-phase power monitoring instrument and a three-phase digital display ammeter.
Here, the step S100 includes, before:
the method comprises the steps of presetting a first preset threshold value, a second preset threshold value, a third preset threshold value, a fourth preset threshold value, a fifth preset threshold value, a sixth preset threshold value, a first power factor expected value and a second preset power factor compensation value, wherein the second preset power factor compensation value is a difference value between the first power factor expected value and the phase power factor. The second preset threshold is smaller than the first preset threshold, the first preset threshold is smaller than the third preset threshold, the second preset threshold is smaller than 0, the third preset threshold is larger than or equal to 0, the fourth preset threshold is calculated according to specific power distribution specifications, and the fifth preset threshold is smaller than the sixth preset threshold.
And S200, calculating the power factors of each phase by using the measured three-phase voltage values and the three line current values, and calculating the absolute value of the change rate of the power factors of each phase according to the power factors of each phase.
S300, judging whether a phase with the absolute value of the change rate of the power factor larger than or equal to a first preset threshold exists in the absolute values of the change rates of the power factors of the phases.
Specifically, the method further comprises:
if the absolute value of the change rate of the power factor of each phase is larger than or equal to a first preset threshold value, judging whether the change rate of the power factor of the phase is smaller than or equal to a second preset threshold value, if so, outputting an alarm signal related to abnormal reduction of the power factor, calculating to obtain capacitance compensation capacity according to a first preset power factor compensation value, and throwing the compensation capacity corresponding to the capacitance compensation capacity into the phase.
It should be noted that, when the power system is operating normally, the absolute value of the change rate of the power factor of each phase should fluctuate within a reasonable range, if the absolute value of the change rate of the power factor of each phase is greater than or equal to the first preset threshold value, it proves that the change rate of the power factor is likely to be abnormally reduced at this time, further judgment needs to be made, at this time, whether the change rate of the power factor of the phase is less than or equal to the second preset threshold value is judged, and because the second threshold value is less than 0, it is proved that at this time, the abnormal reduction of the power factor is large, at this time, an alarm signal related to the abnormal reduction of the power factor is output, and the capacitance compensation capacity is calculated according to the first preset power factor compensation value, and the compensation capacity corresponding to the capacitance compensation capacity is cast into the phase. The three-phase imbalance and power factor fluctuation problems of the abstract power transmission and distribution system are simplified through ingenious design, algorithm modeling is not needed, the reliability of analysis results is high, the three-phase imbalance and power factor fluctuation problems of the power transmission and distribution system can be effectively detected and timely and automatically regulated, the safety of the power system is greatly improved, and the application scene of the invention is greatly expanded.
Specifically, the method further comprises:
and judging whether the change rate of the power factor of the phase is larger than or equal to a third preset threshold value while judging whether the change rate of the power factor of the phase is smaller than or equal to a second preset threshold value, and if so, outputting a signal related to the normal power factor.
Here, if the rate of change of the power factor is greater than or equal to the third preset threshold, since the third preset threshold is greater than or equal to 0, the power factor is in a rising or stable phase at this time, and a signal about the normal power factor is output at this time. The three-phase imbalance and power factor fluctuation problems of the power transmission and distribution system are effectively detected and timely and automatically adjusted, and the safety, reliability and usability of the power transmission and distribution system are further expanded.
Specifically, the method further comprises:
judging whether the absolute value of the change rate of the power factor of each phase is larger than or equal to the first preset threshold value or not, judging whether the phase of which the power factor is smaller than or equal to the fourth preset threshold value exists in the power factor of each phase or not, outputting an alarm signal related to power factor abnormality according to a judging result, and performing switching operation of a corresponding capacitor compensation device.
The method is characterized in that when the power system operates normally, the power factors of all phases need to fluctuate within a reasonable range, if the power factors of all phases are smaller than or equal to a fourth preset threshold value, the power factors are proved to be too low, switching operation of a capacitor compensation device is needed, alarm signals related to abnormal power factors are output according to judgment results, switching operation of the corresponding capacitor compensation device is needed, the problems of three-phase imbalance and power factor fluctuation of an abstract power transmission and distribution system are simplified through ingenious design, algorithm modeling is not needed, reliability of analysis results is high, the problems of three-phase imbalance and power factor fluctuation of the power transmission and distribution system can be effectively detected, timely and automatically adjusted, and the safety of the method is further improved.
Specifically, the method further comprises:
if the power factor of each phase is smaller than or equal to the fourth preset threshold value, calculating to obtain capacitance compensation capacity according to the second preset power factor compensation value, and adding the compensation capacity corresponding to the capacitance compensation capacity to the phase.
Specifically, the method further comprises:
the second preset power factor compensation value is the difference value between the first power factor expected value and the phase power factor.
The method for calculating the second preset power factor compensation value is designed to be the difference value between the first power factor expected value and the power factor, so that the power factor fluctuation problem of the power transmission and distribution system is effectively detected in real time and automatically regulated in time, the safety of the power system is greatly improved, and the application scene of the method is further expanded.
Specifically, the method further comprises:
and when judging whether the absolute value of the change rate of the power factor of each phase is greater than or equal to a first preset threshold value, calculating three voltage effective values by using the measured three phase voltage and three line current instantaneous values, calculating the difference value of the maximum voltage value and the minimum voltage value in the three phase voltages according to the three voltage effective values, judging whether the difference value of the maximum voltage value and the minimum voltage value is greater than or equal to a fifth preset threshold value, and if so, outputting an early warning signal related to three voltage imbalance.
It should be noted that, when the power system is operating normally, the difference between the maximum voltage value and the minimum voltage value in the three phase voltages should be within a reasonable range, that is, the difference between the maximum voltage value and the minimum voltage value should be smaller than the fifth preset threshold, if the difference between the maximum voltage value and the minimum voltage value is greater than or equal to the fifth preset threshold, it is proved that the three phase voltage imbalance problem exists at this time, but because the fifth preset threshold is smaller than the sixth preset threshold, the three phase imbalance problem is not too serious at this time, and at this time, an early warning signal related to the three phase voltage imbalance is output. The three-phase imbalance problem of the abstract power transmission and distribution system is simplified through ingenious design, algorithm modeling is not needed, the reliability of an analysis result is high, the three-phase imbalance problem and the power factor fluctuation problem of the power transmission and distribution system can be effectively detected, corresponding coping strategies can be timely adopted according to different conditions, the safety and the intelligent degree of the power system are greatly improved, and the application scene of the power transmission and distribution system is greatly expanded.
Specifically, the output of the early warning signal related to three voltage imbalances further comprises:
and judging whether the difference value between the maximum voltage value and the minimum voltage value is larger than or equal to a sixth preset threshold value, if so, outputting alarm signals related to serious unbalance of three voltages, and cutting off the power supply of the power distribution cabinet.
It should be noted that, if the difference between the maximum voltage value and the minimum voltage value is greater than or equal to the sixth preset threshold, it is proved that the three voltages are seriously unbalanced at this time, and there may be a potential safety hazard or damage to the power equipment, at this time, an alarm signal related to the three voltages being seriously unbalanced is output, and the power supply of the power distribution cabinet is cut off. The safety and the intelligent degree of the power system are further improved, and the application scene of the invention is greatly expanded.
S400, outputting an alarm signal related to power factor fluctuation according to a judging result and performing switching operation of a corresponding capacitor compensation device.
The method includes the steps of collecting three-phase voltage and three-phase line current of a compensation access point and a load end according to a first detection period through a three-phase power monitoring instrument and a three-phase digital display ammeter, calculating to obtain each phase power factor by using measured three-phase voltage values and three line current values, calculating to obtain the absolute value of the change rate of each phase power factor according to each phase power factor, judging whether a phase with the absolute value of the change rate of the power factor larger than or equal to a first preset threshold exists in the absolute value of the change rate of each phase power factor, outputting alarm signals related to power factor fluctuation according to a judgment result, and performing switching operation of a corresponding capacitor compensation device. The method has the advantages of no need of carrying out a large amount of preparation work, easy implementation and low cost, simplifies the problems of three-phase unbalance and power factor fluctuation of an abstract power transmission and distribution system through ingenious design, does not need algorithm modeling, has high reliability of analysis results, can effectively detect and automatically adjust the problems of three-phase unbalance and power factor fluctuation of the power transmission and distribution system in time, and greatly expands the application scene of the method.
Referring to fig. 2, another embodiment of the present invention provides a control system for a power distribution cabinet, the system including:
the acquisition module 100 comprises a three-phase power monitoring instrument and a three-phase digital display ammeter, and is used for acquiring and compensating the three-phase voltage and the three-phase current of the access point and the load end according to a first detection period,
the control module 200 is configured to calculate power factors of each phase using the measured three-phase voltage values and the three line current values, calculate an absolute value of a change rate of the power factor of each phase according to the power factors of each phase, determine whether a phase with an absolute value of a change rate of the power factor greater than or equal to a first preset threshold exists in the absolute value of the change rate of the power factor of each phase, output an alarm signal related to power factor fluctuation according to a determination result, and control the execution module 300 to perform switching operation of a corresponding capacitor compensation device;
the execution module 300 is used for performing switching operation of the corresponding capacitor compensation device.
In a preferred embodiment, the present application further provides an electronic device, including:
a memory; and a processor, wherein the memory stores computer readable instructions, and the computer readable instructions implement the power distribution cabinet control method when executed by the processor. The computer device may be broadly a server, a terminal, or any other electronic device having the necessary computing and/or processing capabilities. In one embodiment, the computer device may include a processor, memory, network interface, communication interface, etc. connected by a system bus. The processor of the computer device may be used to provide the necessary computing, processing and/or control capabilities. The memory of the computer device may include a non-volatile storage medium and an internal memory. The non-volatile storage medium may have an operating system, computer programs, etc. stored therein or thereon. The internal memory may provide an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface and communication interface of the computer device may be used to connect and communicate with external devices via a network. Which when executed by a processor performs the steps of the method of the invention.
The present invention may be implemented as a computer readable storage medium having stored thereon a computer program which, when executed by a processor, causes steps of a method of an embodiment of the present invention to be performed. In one embodiment, the computer program is distributed over a plurality of computer devices or processors coupled by a network such that the computer program is stored, accessed, and executed by one or more computer devices or processors in a distributed fashion. A single method step/operation, or two or more method steps/operations, may be performed by a single computer device or processor, or by two or more computer devices or processors. One or more method steps/operations may be performed by one or more computer devices or processors, and one or more other method steps/operations may be performed by one or more other computer devices or processors. One or more computer devices or processors may perform a single method step/operation or two or more method steps/operations.
Those of ordinary skill in the art will appreciate that the method steps of the present invention may be implemented by a computer program, which may be stored on a non-transitory computer readable storage medium, to instruct related hardware such as a computer device or a processor, which when executed causes the steps of the present invention to be performed. Any reference herein to memory, storage, database, or other medium may include non-volatile and/or volatile memory, as the case may be. Examples of nonvolatile memory include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage, hard disk, solid state disk, and the like. Examples of volatile memory include Random Access Memory (RAM), external cache memory, and the like.
The technical features described above may be arbitrarily combined. Although not all possible combinations of features are described, any combination of features should be considered to be covered by the description provided that such combinations are not inconsistent.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (10)
1. The power distribution cabinet control method is characterized in that three-phase voltages and three-phase line currents of a compensation access point and a load end are collected according to a first detection period through a three-phase power monitoring instrument and a three-phase digital display ammeter, each phase power factor is obtained through calculation by utilizing measured three-phase voltage values and three line current values, the absolute value of the change rate of each phase power factor is obtained through calculation according to each phase power factor, whether the absolute value of the change rate of the power factor is larger than or equal to a first preset threshold value is judged in the absolute value of the change rate of each phase power factor, and an alarm signal related to power factor fluctuation is output according to a judgment result and corresponding capacitor compensation device switching operation is carried out.
2. The power distribution cabinet control method according to claim 1, characterized in that the method further comprises:
if the absolute value of the change rate of the power factor of each phase is larger than or equal to a first preset threshold value, judging whether the change rate of the power factor of the phase is smaller than or equal to a second preset threshold value, if so, outputting an alarm signal related to abnormal reduction of the power factor, calculating to obtain capacitance compensation capacity according to a first preset power factor compensation value, and throwing the compensation capacity corresponding to the capacitance compensation capacity into the phase.
3. The power distribution cabinet control method according to claim 2, characterized in that the method further comprises:
and judging whether the change rate of the power factor of the phase is larger than or equal to a third preset threshold value while judging whether the change rate of the power factor of the phase is smaller than or equal to a second preset threshold value, and if so, outputting a signal related to the normal power factor.
4. The power distribution cabinet control method according to claim 1, characterized in that the method further comprises:
judging whether the absolute value of the change rate of the power factor of each phase is larger than or equal to the first preset threshold value or not, judging whether the phase of which the power factor is smaller than or equal to the fourth preset threshold value exists in the power factor of each phase or not, outputting an alarm signal related to power factor abnormality according to a judging result, and performing switching operation of a corresponding capacitor compensation device.
5. The method of controlling a power distribution cabinet of claim 4, further comprising:
if the power factor of each phase is smaller than or equal to the fourth preset threshold value, calculating to obtain capacitance compensation capacity according to the second preset power factor compensation value, and adding the compensation capacity corresponding to the capacitance compensation capacity to the phase.
6. The method of controlling a power distribution cabinet according to claim 5, further comprising:
the second preset power factor compensation value is the difference value between the first power factor expected value and the phase power factor.
7. The power distribution cabinet control method according to claim 1, characterized in that the method further comprises:
and when judging whether the absolute value of the change rate of the power factor of each phase is greater than or equal to a first preset threshold value, calculating three voltage effective values by using the measured three phase voltage and three line current instantaneous values, calculating the difference value of the maximum voltage value and the minimum voltage value in the three phase voltages according to the three voltage effective values, judging whether the difference value of the maximum voltage value and the minimum voltage value is greater than or equal to a fifth preset threshold value, and if so, outputting an early warning signal related to three voltage imbalance.
8. The method of claim 7, wherein outputting the warning signal regarding the three voltage imbalances further comprises:
and judging whether the difference value between the maximum voltage value and the minimum voltage value is larger than or equal to a sixth preset threshold value, if so, outputting alarm signals related to serious unbalance of three voltages, and cutting off the power supply of the power distribution cabinet.
9. A power distribution cabinet control system, comprising:
the acquisition module comprises a three-phase power monitoring instrument and a three-phase digital display ammeter, is used for acquiring and compensating the three-phase voltage and the three-phase current of the access point and the load end according to a first detection period,
the control module is used for calculating the power factors of each phase by using the measured three-phase voltage values and the three line current values, calculating the absolute value of the change rate of the power factors of each phase according to the power factors of each phase, judging whether the absolute value of the change rate of the power factors of each phase is greater than or equal to a first preset threshold value or not, outputting an alarm signal related to power factor fluctuation according to a judging result, and controlling the execution module to perform switching operation of the corresponding capacitor compensation device;
and the execution module is used for performing switching operation of the corresponding capacitor compensation device.
10. An electronic device, comprising:
a memory; and a processor having stored thereon computer readable instructions which when executed by the processor implement the power distribution cabinet control method according to any one of claims 1 to 8.
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| CN202310507293.1A CN116526673A (en) | 2023-05-06 | 2023-05-06 | Power distribution cabinet control method and system and electronic equipment thereof |
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| CN202310507293.1A CN116526673A (en) | 2023-05-06 | 2023-05-06 | Power distribution cabinet control method and system and electronic equipment thereof |
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