CN117950309B - Power control cabinet system based on accurate control and operation method thereof - Google Patents
Power control cabinet system based on accurate control and operation method thereof Download PDFInfo
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims description 27
- 238000005070 sampling Methods 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 238000012163 sequencing technique Methods 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000013139 quantization Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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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
- H02J13/00001—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 display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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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
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention relates to the technical field of power control, and discloses a power control cabinet system based on accurate control and an operation method thereof. According to the invention, firstly, through the cooperation of the rectifying module and the filtering module, the fault self-detection of the power supply control cabinet is realized by judging the fluctuation condition of the voltage and the current in the power supply control cabinet after the power-on; after the self-checking is passed, the synchronous operation of each module in the system is ensured by initializing the power control cabinet system; after initialization is completed, the power control cabinet is controlled through the cooperation among the I/O peripheral equipment, the I/O interface and the CPU, and meanwhile, after a control signal is generated, the power control cabinet is controlled through setting a constraint function, so that the safety and reliability of controlling the power control cabinet are improved.
Description
Technical Field
The invention relates to the technical field of power control, in particular to a power control cabinet system based on accurate control and an operation method thereof.
Background
Accurate control of electrical equipment is critical to improving production efficiency and extending service life, but because of the dynamics of the operating parameters of electrical equipment, the execution time of operations cannot be accurately controlled and adjusted, thereby affecting the efficiency and reliability of the system. Thus, the method is applicable to a variety of applications. Through accurate and reliable program programming, the level and the efficiency of the automatic control of the electrical equipment are improved, and the control requirements of low cost, safety and accuracy can be met.
The prior art chinese patent application CN109031987a only judges whether the high-frequency accurate voltage regulator type power supply is in a stable state by collecting the voltage difference value and the frequency stability of the current of the high-frequency accurate voltage regulator type power supply within a set time in real time, but because the operation parameters of the electrical equipment have dynamic properties, there is a great limitation in judging the high-frequency accurate voltage regulator type power supply.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a power control cabinet system based on accurate control and an operation method thereof, which have the advantages of low cost, safety, accuracy and the like, and solve the problem that the execution time of operation cannot be accurately controlled and regulated.
(II) technical scheme
In order to solve the technical problem that the execution time of the operation cannot be accurately controlled and regulated, the invention provides the following technical scheme:
s1, after starting up, performing fault self-checking on a power control cabinet;
S2, initializing a power supply control cabinet after the fault self-checking result is normal;
s3, after the power control cabinet is initialized, starting the power control cabinet, inputting control signals to the power control cabinet through the I/O peripheral equipment, and controlling the power control cabinet by combining with a set constraint function;
s4, setting various parameters of the power control cabinet in operation, monitoring the various parameters of the power control cabinet in real time, and performing alarm processing when the operating parameters of the power control cabinet are found to exceed the set parameters.
Preferably, the performing fault self-checking on the power control cabinet after the power-on includes:
s11, adjusting and monitoring the current of the power control cabinet when the power control cabinet is started through a rectifying module;
And S12, adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started through the filtering module.
Preferably, the adjusting and monitoring the current of the power control cabinet when the power control cabinet is started up through the rectifying module includes:
The rectifying module control unit of the power supply control cabinet is set to be composed of n diodes, and the n diodes are sequentially conducted due to unidirectional conductivity of the diodes and guide current into a correct circuit;
the monitoring unit of the rectifying module can monitor the harmonic condition of the power grid when the current passes through the rectifying module in real time;
Because the voltage output after rectification can generate periodic fluctuation, the average voltage value output after rectification is calculated based on the power grid harmonic condition when the monitoring unit can monitor the current through the rectification module in real time, and is as follows:
wherein U1 is a rated value of voltage, ud is an average value of the voltage, and ωt is an abscissa in the harmonic of the power grid;
setting R as a load resistor connected with the output after rectification, and outputting direct current by the rectification module as follows:
；
setting an average voltage threshold value at the beginning of the power control cabinet, and reporting that the power control cabinet has faults when the average voltage value output after rectification is calculated to exceed or be lower than the set average voltage threshold value of the power control cabinet.
Preferably, the adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started up by the filtering module includes:
A filter capacitor is arranged in parallel with the load resistor, so that the fluctuation condition of the rectified direct current voltage is reduced;
Because the time constant of the filter capacitor is the product of the load resistor R and the filter capacitor Cd, the time constant is set to be 8 times of the period of the output voltage after rectification;
Wherein W is the period of the rectified output voltage, and Cd is a filter capacitor;
Setting a direct-current voltage fluctuation threshold, and when the filtering module adjusts the voltage of the power control cabinet when the power control cabinet is started, reporting that the direct-current voltage fluctuation exceeds or is lower than the direct-current voltage fluctuation threshold, and reporting that the power control cabinet has faults.
Preferably, the initializing the power control cabinet includes: clock initialization, I/O interface initialization, sampling module initialization, I/O peripheral initialization;
the clock initialization includes:
The CPU is synchronized with the I/O interface, the sampling module and the I/O peripheral in a synchronous clock mode, and meanwhile, the running process of the power supply control cabinet is periodically divided during the running of the power supply control cabinet;
The CPU carries out periodic division on the operation process of the power supply control cabinet, and the method comprises the following steps: fetch cycle, execute cycle, interrupt cycle;
The initialization of the sampling module comprises the following steps:
when the CPU performs synchronous clock, the synchronous clock of the CPU is received, the factors such as voltage, current and temperature of the power control cabinet are sampled in real time, the data sampled in real time are transmitted to the CPU, and comparison analysis is performed through the CPU;
The I/O interface initialization includes:
the synchronous clock signal transmitted by the CPU is activated, and the communication among the CPU, the peripheral equipment and each module is realized through a bus;
The I/O peripheral initialization includes:
The synchronous clock signal transmitted by the CPU is activated by the I/O interface and starts to run, and a user can input control information to the power supply control cabinet through the I/O peripheral.
Preferably, after the power control cabinet is initialized, starting the power control cabinet, inputting a control signal to the power control cabinet through the I/O peripheral equipment, and controlling the power control cabinet by combining with a set constraint function comprises:
s31, a user inputs various control data through the I/O peripheral equipment;
S32, the I/O interface sorts the received control data from the I/O peripheral equipment according to time and control data type;
the control data types comprise common control data and emergency control data;
When the common control data arrives at the I/O, the I/O can sort based on the input time, and when the emergency control data arrives at the I/O, the I/O can put the emergency control data into the first position of the sorting queue;
s33, the CPU calls and processes the sequenced control data based on the divided period;
s331, executing and fetching period, executing period and interrupt period of CPU circulation;
when the CPU is in the instruction fetching period, the CPU takes out a piece of control data at the first bit of the sequencing queue and analyzes and decodes the control data;
After analysis and decoding, the CPU enters an execution period, generates a corresponding control signal according to a decoding result, transmits the control signal to the control module through the I/O interface, and controls the power supply control cabinet according to the control signal by the control module;
After receiving the control signal, the control module feeds back control information to the CPU, and after receiving the feedback control signal, the CPU ends the execution period and enters an interrupt period;
After entering an interrupt period, the CPU detects whether emergency control data exists in the current sequencing queue, and executes the emergency control data when the presence of the emergency control data is detected; when no emergency control data exists, ending the interrupt period and entering the next finger taking period;
The step of setting the constraint function to control the power control cabinet comprises the steps of setting the constraint function, wherein a calculation formula is as follows:
wherein Ft represents a constraint function of a control target t, e (t) represents the fitness of the function in the constraint, and t represents the control target;
taking the minimum difference value between the temperature output value and the expected value in control as a control target, thereby establishing a control target function, wherein the calculation formula is as follows:
wherein fmin represents the minimum difference between the temperature output value in control and the expected value;
Controlling the power supply control cabinet according to the minimum difference value between the temperature output value and the expected value in control;
before the control of the power control cabinet, blurring the inputted temperature subset;
Setting the basic temperature threshold value of the input subset as [ -a, +a ], and setting the deviation threshold value of the quantization threshold value based on the temperature change condition of the power control cabinet measured in real time as m;
m=q measurement-Q set
Wherein, Q is measured and represents the temperature that the power control cabinet measures in real time, Q is set up and represents the temperature that the power control cabinet presumes in real time;
Further, according to the change condition of the current loop control value when the temperature is changed, the current loop control value is fuzzified through the maximum membership function, so that the current loop control value becomes a specific fixed value, and the calculation formula is as follows:
Wherein Vkp represents data after the blurring processing of the temperature input subset, NB represents a maximum membership function decision value, PB represents a blurring control quantity, and λr represents a current loop control value of a closed loop at the r-th position of the power supply control cabinet;
the control of the temperature is converted into the control of the current of each node in the power supply control cabinet;
according to the calculation result, the temperature of the power control cabinet is regulated, the position of the input data is closed-loop controlled, and the control calculation formula is as follows:
S represents a position closed loop set current loop control value of the power control cabinet, MD represents a control coefficient of a D region position closed loop in the power control cabinet, eta represents a control value of a given position closed loop q sent by the CPU, eta represents a feedback value of a given position closed loop w of the power control cabinet, MDi represents an integral coefficient of the D region position closed loop in the power control cabinet at the moment i, eta represents an error value of the given position closed loop q of the power control cabinet;
the current loop is controlled by a P control method, and the current loop control calculation formula is as follows:
wherein MS represents a gain coefficient, xj represents a current loop control value of the power control cabinet, sg represents a set current loop control value of a closed loop g at a given position of the power control cabinet, and Sh represents a current loop control value of a closed loop h at a feedback position of the power control cabinet.
Preferably, the setting the parameters of the power control cabinet during operation, and monitoring the parameters of the power control cabinet during operation in real time, and when the operating parameters of the power control cabinet are found to exceed the set parameters, performing alarm processing includes:
Comparing various parameters of the power control cabinet, such as voltage, current, temperature and other factors, sampled in real time by the sampling module with various parameters when the power control cabinet is set to operate, and judging whether hidden danger exists in the power control cabinet;
After the CPU performs comparison analysis, when detecting that the operation parameters of the power control cabinet are beyond the set parameter range by 10%, the CPU generates an alarm signal to an alarm module, and the alarm module alarms;
when detecting that the operation parameters of the power control cabinet are beyond the set parameter range by 20%, the CPU generates an alarm signal to the alarm module and an emergency control signal to the interrupt module, and the interrupt module interrupts the operation of the power control cabinet.
The embodiment also discloses a power control cabinet system based on accurate control, specifically includes: the system comprises a CPU, a control module, a sampling module, an alarm module, an I/O interface, an I/O peripheral, an interrupt module, a rectifying module and a filtering module;
The CPU is used for analyzing and processing the control data and the sampling data collected in real time and generating corresponding control signals;
the sampling module is used for sampling factors such as voltage, current, temperature and the like of the power supply control cabinet in real time and transmitting the data sampled in real time to the CPU;
the alarm module is used for receiving the control signal and giving an alarm;
the I/O interface is used for realizing communication among the CPU, the peripheral equipment and each module through a bus;
the I/O peripheral is used for inputting control data of various types;
The interrupt module is used for receiving the control signal and powering off the power control cabinet;
the rectification module is used for adjusting and monitoring the current of the power control cabinet when the power control cabinet is started;
the filtering module is used for adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started.
(III) beneficial effects
Compared with the prior art, the invention provides a power control cabinet system based on accurate control and an operation method thereof, and the power control cabinet system has the following beneficial effects:
1. According to the invention, the power control cabinet is subjected to self-checking in a rectifying and filtering mode when the power control cabinet is started, the voltage and current fluctuation conditions of the power control cabinet are monitored in real time in the self-checking process, and the power control cabinet is processed based on the monitored fluctuation conditions, so that the safety of the power control cabinet is improved.
2. According to the invention, each module of the power control cabinet is initialized, and the time signals of each module are ensured to be synchronous in a clock synchronization mode, so that the synchronism of the safety of the power control cabinet is improved.
3. According to the invention, the power control cabinet is precisely controlled in a mode of inputting instructions through the I/O peripheral equipment and collecting data information of the power control cabinet in real time, so that the accuracy of the power control cabinet is improved.
Drawings
Fig. 1 is a schematic diagram of an operation flow structure of a precisely controlled power control cabinet according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment discloses a power control cabinet operation method based on accurate control, which specifically comprises the following steps:
s1, after starting up, performing fault self-checking on a power control cabinet;
performing fault self-checking on the power control cabinet based on each module in the power control cabinet comprises:
s11, adjusting and monitoring the current of the power control cabinet when the power control cabinet is started through a rectifying module;
The rectifying module control unit of the power supply control cabinet is set to be composed of n diodes, and the n diodes are sequentially conducted due to unidirectional conductivity of the diodes and guide current into a correct circuit;
further, the monitoring unit of the rectifying module can monitor the harmonic condition of the power grid when the current passes through the rectifying module in real time;
Further, since the rectified output voltage will generate periodic fluctuation, based on the power grid harmonic condition when the monitoring unit will monitor the current through the rectification module in real time, the average voltage value of the rectified output is calculated as follows:
wherein U1 is a rated value of voltage, ud is an average value of the voltage, and ωt is an abscissa in the harmonic of the power grid;
setting R as a load resistor connected with the output after rectification, and outputting direct current by the rectification module as follows:
；
further, setting an average voltage threshold value at the beginning of the power control cabinet, and reporting that the power control cabinet has a fault when the average voltage value output after rectification is calculated to be more than or less than the set average voltage threshold value of the power control cabinet;
S12, adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started through a filtering module;
The voltage adjustment of the power control cabinet when the power control cabinet is started up through the filtering module comprises the following steps:
A filter capacitor is arranged in parallel with the load resistor, so that the fluctuation condition of the rectified direct current voltage is reduced;
further, as the time constant of the filter capacitor is the product of the load resistor R and the filter capacitor Cd, the time constant is set to be 8 times of the period of the output voltage after rectification;
Wherein W is the period of the rectified output voltage, and Cd is a filter capacitor;
Further, setting a direct-current voltage fluctuation threshold, and reporting that the power control cabinet has a fault when the direct-current voltage fluctuation condition exceeds or is lower than the direct-current voltage fluctuation threshold after the filtering module adjusts the voltage of the power control cabinet when the power control cabinet is started;
S2, initializing a power supply control cabinet after the fault self-checking result is normal;
Clock initialization, I/O interface initialization, sampling module initialization, I/O peripheral initialization;
further, the clock initialization includes:
The CPU is synchronized with the I/O interface, the sampling module and the I/O peripheral in a synchronous clock mode, and meanwhile, the running process of the power supply control cabinet is periodically divided during the running of the power supply control cabinet;
Further, the CPU performs cycle division on the operation process of the power control cabinet, including: fetch cycle, execute cycle, interrupt cycle;
Further, the initialization of the sampling module includes:
when the CPU performs synchronous clock, the synchronous clock of the CPU is received, the factors such as voltage, current and temperature of the power control cabinet are sampled in real time, the data sampled in real time are transmitted to the CPU, and comparison analysis is performed through the CPU;
Further, the I/O interface initialization includes:
the synchronous clock signal transmitted by the CPU is activated, and the communication among the CPU, the peripheral equipment and each module is realized through a bus;
Further, the I/O peripheral initialization includes:
The synchronous clock signal transmitted by the CPU is activated by the I/O interface and starts to run, and a user can input control information to the power supply control cabinet through the I/O peripheral equipment;
S3, after initializing the power control cabinet, starting the power control cabinet, inputting control signals to the power control cabinet through the I/O peripheral equipment, and controlling the power control cabinet by combining with a set constraint function, wherein the step of controlling the power control cabinet comprises the following steps:
s31, a user inputs various control data through the I/O peripheral equipment;
S32, the I/O interface sorts the received control data from the I/O peripheral equipment according to time and control data type;
The control data types include normal control data and emergency control data;
When the common control data arrives at the I/O, the I/O can sort based on the input time, and when the emergency control data arrives at the I/O, the I/O can put the emergency control data into the first position of the sorting queue;
s33, the CPU calls and processes the sequenced control data based on the divided period;
s331, executing and fetching period, executing period and interrupt period of CPU circulation;
when the CPU is in the instruction fetching period, the CPU takes out a piece of control data at the first bit of the sequencing queue and analyzes and decodes the control data;
After analysis and decoding, the CPU enters an execution period, generates a corresponding control signal according to a decoding result, transmits the control signal to the control module through the I/O interface, and controls the power supply control cabinet according to the control signal by the control module;
After receiving the control signal, the control module feeds back control information to the CPU, and after receiving the feedback control signal, the CPU ends the execution period and enters an interrupt period;
After entering an interrupt period, the CPU detects whether emergency control data exists in the current sequencing queue, and executes the emergency control data when the presence of the emergency control data is detected; when no emergency control data exists, ending the interrupt period and entering the next finger taking period;
The step of setting the constraint function to control the power control cabinet comprises the steps of setting the constraint function, wherein a calculation formula is as follows:
wherein Ft represents a constraint function of a control target t, e (t) represents the fitness of the function in the constraint, and t represents the control target;
taking the minimum difference value between the temperature output value and the expected value in control as a control target, thereby establishing a control target function, wherein the calculation formula is as follows:
wherein fmin represents the minimum difference between the temperature output value in control and the expected value;
Controlling the power supply control cabinet according to the minimum difference value between the temperature output value and the expected value in control;
before the control of the power control cabinet, blurring the inputted temperature subset;
Setting the basic temperature threshold value of the input subset as [ -a, +a ], and setting the deviation threshold value of the quantization threshold value based on the temperature change condition of the power control cabinet measured in real time as m;
m=q measurement-Q set
Wherein, Q is measured and represents the temperature that the power control cabinet measures in real time, Q is set up and represents the temperature that the power control cabinet presumes in real time;
Further, according to the change condition of the current loop control value when the temperature is changed, the current loop control value is fuzzified through the maximum membership function, so that the current loop control value becomes a specific fixed value, and the calculation formula is as follows:
Wherein Vkp represents data after the blurring processing of the temperature input subset, NB represents a maximum membership function decision value, PB represents a blurring control quantity, and λr represents a current loop control value of a closed loop at the r-th position of the power supply control cabinet;
the control of the temperature is converted into the control of the current of each node in the power supply control cabinet;
according to the calculation result, the temperature of the power control cabinet is regulated, the position of the input data is closed-loop controlled, and the control calculation formula is as follows:
S represents a position closed loop set current loop control value of the power control cabinet, MD represents a control coefficient of a D region position closed loop in the power control cabinet, eta represents a control value of a given position closed loop q sent by the CPU, eta represents a feedback value of a given position closed loop w of the power control cabinet, MDi represents an integral coefficient of the D region position closed loop in the power control cabinet at the moment i, eta represents an error value of the given position closed loop q of the power control cabinet;
the current loop is controlled by a P control method, and the current loop control calculation formula is as follows:
wherein MS represents a gain coefficient, xj represents a current loop control value of the power control cabinet, sg represents a set current loop control value of a closed loop g at a given position of the power control cabinet, and Sh represents a current loop control value of a closed loop h at a feedback position of the power control cabinet.
S4, setting various parameters of the power control cabinet during operation, monitoring the various parameters of the power control cabinet during operation in real time, and performing alarm processing when the operating parameters of the power control cabinet are found to exceed the set parameters;
Comparing various parameters of the power control cabinet, such as voltage, current, temperature and other factors, sampled in real time by the sampling module with various parameters when the power control cabinet is set to operate, and judging whether hidden danger exists in the power control cabinet;
After the CPU performs comparison analysis, when detecting that the operation parameters of the power control cabinet are beyond the set parameter range by 10%, the CPU generates an alarm signal to an alarm module, and the alarm module alarms;
when detecting that the operation parameters of the power supply control cabinet exceed the set parameter range by 20%, the CPU generates an alarm signal to the alarm module and an emergency control signal to the interrupt module, and the interrupt module interrupts the operation of the power supply control cabinet;
The embodiment also discloses a power control cabinet system based on accurate control, specifically includes: the system comprises a CPU, a control module, a sampling module, an alarm module, an I/O interface, an I/O peripheral, an interrupt module, a rectifying module and a filtering module;
The CPU is used for analyzing and processing the control data and the sampling data collected in real time and generating corresponding control signals;
the sampling module is used for sampling factors such as voltage, current, temperature and the like of the power supply control cabinet in real time and transmitting the data sampled in real time to the CPU;
the alarm module is used for receiving the control signal and giving an alarm;
the I/O interface is used for realizing communication among the CPU, the peripheral equipment and each module through a bus;
the I/O peripheral is used for inputting control data of various types;
The interrupt module is used for receiving the control signal and powering off the power control cabinet;
the rectification module is used for adjusting and monitoring the current of the power control cabinet when the power control cabinet is started;
the filtering module is used for adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The operation method of the power control cabinet based on the accurate control is characterized by comprising the following steps of:
s1, after starting up, performing fault self-checking on a power control cabinet;
S2, initializing a power supply control cabinet after the fault self-checking result is normal;
s3, after the power control cabinet is initialized, starting the power control cabinet, inputting control signals to the power control cabinet through the I/O peripheral equipment, and controlling the power control cabinet by combining with a set constraint function;
s4, setting various parameters of the power control cabinet during operation, monitoring the various parameters of the power control cabinet during operation in real time, and performing alarm processing when the operating parameters of the power control cabinet are found to exceed the set parameters;
The step of setting the constraint function to control the power control cabinet comprises the steps of setting the constraint function, wherein a calculation formula is as follows:
；
Wherein, Constraint function representing control target t,/>Representing the fitness of the function in the constraint, and t represents a control target;
taking the minimum difference value between the temperature output value and the expected value in control as a control target, thereby establishing a control target function, wherein the calculation formula is as follows:
；
Wherein, Representing a minimum difference between the temperature output value in control and the desired value;
Controlling the power supply control cabinet according to the minimum difference value between the temperature output value and the expected value in control;
before the control of the power control cabinet, blurring the inputted temperature subset;
Setting the basic temperature threshold value of the input subset as [ -a, +a ], and setting the deviation threshold value of the quantization threshold value based on the temperature change condition of the power control cabinet measured in real time as m;
m=q measurement-Q set
Wherein, Q is measured and represents the temperature that the power control cabinet measures in real time, Q is set up and represents the temperature that the power control cabinet presumes in real time;
the control of the temperature is converted into the control of the current of each node in the power supply control cabinet;
the input data is subjected to position closed-loop control, and a control calculation formula is as follows:
；
wherein S represents a position closed loop set current loop control value of the power supply control cabinet, Control coefficient representing closed loop of D region position in power supply control cabinet,/>Control value representing closed loop q of given position sent by CPU,/>Feedback value representing closed loop w at given position of power control cabinet,/>The integral coefficient of the closed loop of the D area position in the power control cabinet at the moment i is represented, and eta represents the error value of the closed loop q of the given position of the power control cabinet;
the current loop is controlled by a P control method, and the current loop control calculation formula is as follows:
；
Wherein, Representing gain factor,/>Representing the current loop control value of a power supply control cabinet,/>Set current loop control value of closed loop g at given position of power supply control cabinet,/>A current loop control value representing a feedback position closed loop h of the power supply control cabinet;
According to the change condition of the current loop control value when the temperature is changed, the current loop control value is fuzzified by a maximum membership function, so that the current loop control value becomes a specific fixed value, and the calculation formula is as follows:
；
Wherein, Representing data after blurring of a subset of temperature inputs,/>Representing the maximum membership function decision value,/>Representing the fuzzy control quantity,/>And a current loop control value expressed as a closed loop of the r-th position of the power control cabinet.
2. The power control cabinet operation method based on accurate control according to claim 1, wherein: after the power-on, firstly performing fault self-checking on the power control cabinet comprises the following steps:
s11, adjusting and monitoring the current of the power control cabinet when the power control cabinet is started through a rectifying module;
And S12, adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started through the filtering module.
3. The method for operating a power control cabinet based on precise control according to claim 2, wherein the adjusting and monitoring the current of the power control cabinet when the power control cabinet is started up by the rectifying module comprises:
The rectifying module control unit of the power supply control cabinet is composed of n diodes;
the monitoring unit of the rectifying module can monitor the harmonic condition of the power grid when the current passes through the rectifying module in real time;
Based on the power grid harmonic condition that the monitoring unit can monitor current in real time when passing through the rectification module, the average voltage value output after rectification is calculated as:
；
Wherein, Is the rated value of voltage,/>Is the average value of the voltage,/>Is the abscissa in the grid harmonics;
setting R as a load resistor connected with the output after rectification, and outputting direct current by the rectification module as follows:
；
setting an average voltage threshold value at the beginning of the power control cabinet, and reporting that the power control cabinet has faults when the average voltage value output after rectification is calculated to exceed or be lower than the set average voltage threshold value of the power control cabinet.
4. The method for operating a power control cabinet based on precise control according to claim 2, wherein the adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started up by the filtering module comprises:
The voltage adjustment of the power control cabinet when the power control cabinet is started up through the filtering module comprises the following steps:
the filter capacitor is arranged in parallel with the load resistor, so that the fluctuation condition of the rectified direct current voltage is reduced;
setting the time constant to be 8 times of the period of the output voltage after rectification;
；
；
wherein W is the period of the rectified output voltage, The filter capacitor is a load resistor connected with the output after rectification;
Setting a direct-current voltage fluctuation threshold, and when the filtering module adjusts the voltage of the power control cabinet when the power control cabinet is started, reporting that the direct-current voltage fluctuation exceeds or is lower than the direct-current voltage fluctuation threshold, and reporting that the power control cabinet has faults.
5. The method for operating a power control cabinet based on accurate control according to claim 1, wherein the initializing the power control cabinet comprises: clock initialization, I/O interface initialization, sampling module initialization, I/O peripheral initialization;
the clock initialization includes:
The CPU is synchronized with the I/O interface, the sampling module and the I/O peripheral in a synchronous clock mode, and meanwhile, the running process of the power supply control cabinet is periodically divided during the running of the power supply control cabinet;
The CPU carries out periodic division on the operation process of the power supply control cabinet, and the method comprises the following steps: fetch cycle, execute cycle, interrupt cycle;
The initialization of the sampling module comprises the following steps:
When the CPU performs synchronous clock, the synchronous clock of the CPU is received, the voltage, the current and the temperature factors of the power control cabinet are sampled in real time, the data sampled in real time are transmitted to the CPU, and the CPU is used for comparison analysis;
The I/O interface initialization includes:
the synchronous clock signal transmitted by the CPU is activated, and the communication among the CPU, the peripheral equipment and each module is realized through a bus;
The I/O peripheral initialization includes:
The synchronous clock signal transmitted by the CPU is activated by the I/O interface and starts to run, and a user can input control information to the power supply control cabinet through the I/O peripheral.
6. The method for operating a power control cabinet based on accurate control according to claim 1, wherein after the power control cabinet is initialized, starting the power control cabinet and inputting a control signal to the power control cabinet through the I/O peripheral device and controlling the power control cabinet in combination with setting a constraint function comprises:
s31, a user inputs various control data through the I/O peripheral equipment;
S32, the I/O interface sorts the received control data from the I/O peripheral equipment according to time and control data type;
the control data types comprise common control data and emergency control data;
When the common control data arrives at the I/O, the I/O can sort based on the input time, and when the emergency control data arrives at the I/O, the I/O can put the emergency control data into the first position of the sorting queue;
s33, the CPU calls and processes the sequenced control data based on the divided period;
s331, executing and fetching period, executing period and interrupt period of CPU circulation;
when the CPU is in the instruction fetching period, the CPU takes out a piece of control data at the first bit of the sequencing queue and analyzes and decodes the control data;
After analysis and decoding, the CPU enters an execution period, generates a corresponding control signal according to a decoding result, transmits the control signal to the control module through the I/O interface, and controls the power supply control cabinet according to the control signal by the control module;
After receiving the control signal, the control module feeds back control information to the CPU, and after receiving the feedback control signal, the CPU ends the execution period and enters an interrupt period;
after entering an interrupt period, the CPU detects whether emergency control data exists in the current sequencing queue, and executes the emergency control data when the presence of the emergency control data is detected; and when the absence of the emergency control data is detected, ending the interrupt period and entering the next finger taking period.
7. The method for operating a power control cabinet based on accurate control according to claim 1, wherein the steps of setting each parameter of the power control cabinet during operation, monitoring each parameter of the power control cabinet during operation in real time, and performing alarm processing when the power control cabinet operation parameter is found to exceed the set parameter comprise:
Comparing various parameters of the voltage, the current and the temperature factors of the power control cabinet with various parameters of the power control cabinet when the power control cabinet is set to operate through a sampling module, and judging whether the power control cabinet has hidden danger or not;
After the CPU performs comparison analysis, when detecting that the operation parameters of the power control cabinet are beyond the set parameter range by 10%, the CPU generates an alarm signal to an alarm module, and the alarm module alarms;
when detecting that the operation parameters of the power control cabinet are beyond the set parameter range by 20%, the CPU generates an alarm signal to the alarm module and an emergency control signal to the interrupt module, and the interrupt module interrupts the operation of the power control cabinet.
8. A precision control-based power control cabinet system implementing the precision control-based power control cabinet operation method of any one of claims 1-7, comprising: the system comprises a CPU, a control module, a sampling module, an alarm module, an I/O interface, an I/O peripheral, an interrupt module, a rectifying module and a filtering module;
The CPU is used for analyzing and processing the control data and the sampling data collected in real time and generating corresponding control signals;
The sampling module is used for sampling the voltage, the current and the temperature factors of the power supply control cabinet in real time and transmitting the data sampled in real time to the CPU;
the alarm module is used for receiving the control signal and giving an alarm;
the I/O interface is used for realizing communication among the CPU, the peripheral equipment and each module through a bus;
the I/O peripheral is used for inputting control data of various types;
The interrupt module is used for receiving the control signal and powering off the power control cabinet;
the rectification module is used for adjusting and monitoring the current of the power control cabinet when the power control cabinet is started;
the filtering module is used for adjusting and monitoring the voltage of the power control cabinet when the power control cabinet is started.
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