CN117317966A - Intelligent power consumption management system and management control method for station power supply - Google Patents
Intelligent power consumption management system and management control method for station power supply Download PDFInfo
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- CN117317966A CN117317966A CN202311268086.1A CN202311268086A CN117317966A CN 117317966 A CN117317966 A CN 117317966A CN 202311268086 A CN202311268086 A CN 202311268086A CN 117317966 A CN117317966 A CN 117317966A
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- 238000004891 communication Methods 0.000 claims description 40
- 238000002955 isolation Methods 0.000 claims description 8
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Classifications
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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
- H02H3/08—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 responsive to excess current
- H02H3/083—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 responsive to excess current for three-phase systems
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an intelligent power consumption management system and method for a station power supply. The system comprises: the device comprises a bus detection module, a feeder detection module, a central processing module, a power utilization control execution module and a priority phase prompt module; the bus detection module is used for detecting three-phase bus current and determining three-phase unbalanced current according to the three-phase bus current; the feeder line detection module is used for detecting the load current on each feeder line under each phase line and determining the electric power for the load according to the load current; the central processing module is used for determining the priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sending the priority electricity utilization phase information to the priority phase prompting module so that the priority phase prompting module prompts the priority electricity utilization phase in the three phases; and the power-off instruction is determined to the power-on execution control module according to the three-phase unbalanced current, the preferential power-on phase information and the load power on each feeder under each phase line so as to disconnect the power supply of the corresponding feeder according to the power-off instruction by using the power-on execution control module.
Description
Technical Field
The embodiment of the invention relates to the technical field of station power supplies, in particular to an intelligent power consumption management system and a management control method for the station power supplies.
Background
The alternating current system used in the transformer station is used as a power supply of a transformer station load, the load mainly comprises auxiliary power consumption of important primary equipment such as main transformer air cooling, fire water pumps, in-station switch knife switch mechanisms and the like, along with the improvement of the intelligent, remote and programmed levels of related equipment, the requirements on the stability and reliability of power supply are more and more important, and according to the current accident event classification requirements, a 220 kilovolt transformer station single-section alternating current bus is subjected to voltage loss for more than two hours, so that a four-level event is caused. However, in the actual application of the existing transformer substation, the electricity utilization planning of many stations, especially the old stations, is not standard, the wiring is not clear, and the temporary electricity utilization load is not managed, so that the phenomenon that the single-phase load current is too high to cause unbalanced current protection action occurs in the station power supply due to the temporary electricity utilization access, and the security of the station electricity utilization system is endangered and even four-level events are caused. Therefore, analysis of load characteristics and load management of each feeder line of the ac system for the reinforcing station are increasingly urgent.
At present, strict priority management is not carried out on electricity consumption of a station electricity consumption system in all directions in the prior art, and the security problem of the station electricity consumption system still can be caused.
Disclosure of Invention
The invention provides an intelligent power consumption management system and a management control method for a station power supply, which are used for comprehensively improving the safe power consumption of the station power supply.
To achieve the above object, in a first aspect, an embodiment of the present invention provides an intelligent power management system for a station power supply, including: the device comprises a bus detection module, a feeder detection module, a central processing module, a power utilization control execution module and a priority phase prompt module;
the bus detection module is in communication connection with the central processing module; the feeder line detection module is in communication connection with the central processing module; the central processing module is in communication connection with the power utilization control execution module; the central processing module is in communication connection with the priority phase prompting module;
the bus detection module is used for detecting three-phase bus current and determining three-phase unbalanced current according to the three-phase bus current;
the feeder line detection module is used for detecting load current on each feeder line under each phase line and determining electric power for load according to the load current;
the central processing module is used for determining priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sending the priority electricity utilization phase information to the priority phase prompting module so that the priority phase prompting module prompts a priority electricity utilization phase in three phases;
and the central processing module is also used for determining a power-off instruction to the power-on control execution module according to the three-phase unbalanced current, the preferential power-on phase information and the load power on each feeder under each phase line so that the power-on control execution module cuts off the power supply of the corresponding feeder according to the power-off instruction.
Optionally, the central processing module includes: the device comprises a storage unit, a first CPU control unit and a first communication unit;
the storage unit is used for storing three-phase unbalanced currents of a preset bus; storing the maximum power of the load on each feed line under each phase line;
the first CPU control unit is used for determining preferential electricity utilization phase information according to the included angle between the three-phase bus current and the three-phase unbalanced current when the three-phase unbalanced current is larger than the preset bus three-phase unbalanced current;
the CPU control unit is further used for outputting a power-off instruction if the load power consumption on the preset feeder below the preset phase is larger than the load maximum power consumption when the three-phase unbalanced current is larger than the preset bus three-phase unbalanced current and the preset phase in the priority power consumption phase information is the load phase;
the first communication unit is used for sending the priority electricity utilization phase information to the priority phase prompt module; and the power-off instruction is also used for sending the power-on control execution module.
Optionally, the storage unit is further configured to store a power outage priority on each feeder under each phase line;
and the first CPU control unit is further used for outputting a power-off instruction according to the power-off priority and the power-on power consumption of the load on a preset feed line under the preset phase when the three-phase unbalanced current is larger than the preset bus three-phase unbalanced current and the preset phase in the priority power-on phase information is a load phase.
Optionally, the feeder line detection module comprises a load current acquisition circuit, an electrical isolation circuit, a filter circuit, an amplifying circuit, a second CPU control unit and a second communication unit;
the load current acquisition circuit is used for detecting load voltage on each feed line under each phase line; the electric isolation circuit is used for isolating the load voltage; the filter circuit is used for filtering the isolated load voltage; the amplifying circuit is used for amplifying the filtered load voltage signal and outputting the amplified load voltage signal to the second CPU control unit;
the second CPU control unit is used for determining the electric power for the load according to the amplified load voltage signal and sending the electric power for the load to the central processing module through the second communication unit.
Optionally, the priority phase prompting module comprises a third CPU control unit, a third communication unit and a signal indicating unit;
the third communication unit is used for receiving the priority phase electricity consumption information output by the central processing module and sending the priority phase electricity consumption information to the third CPU control unit;
the third CPU control unit is used for outputting a priority electricity utilization phase indication instruction to the signal indication unit according to the priority phase electricity utilization phase information;
the signal indicating unit is used for prompting the priority electricity utilization phase in the three phases.
Optionally, the power utilization control execution module comprises a fourth CPU control unit, a fourth communication unit and a control switch driving circuit;
the fourth communication unit is used for receiving the power-off instruction output by the central processing module and sending the power-off instruction to the fourth CPU control unit;
the fourth CPU control unit is used for outputting a shielding power supply authorization instruction to the control switch driving circuit according to the power-off instruction and a key password input by a user;
and the control switch driving circuit is used for driving and disconnecting the power supply of the corresponding feeder line.
Optionally, the central processing module is further configured to obtain the pre-power for the user when the three-phase unbalanced current is greater than the pre-set bus three-phase unbalanced current and a specific phase in the preferential power phase information is a preferential power phase;
and outputting an unavailable electricity instruction to the electricity consumption control module to disconnect the power supply of the specific feeder line according to the power-off instruction when the preset electricity consumption power of the user and the load electricity consumption power of the specific feeder line under the specific phase are larger than the maximum load electricity consumption power.
In a second aspect, an embodiment of the present invention further provides a method for controlling intelligent power consumption management of a station power supply, where the method is applied to the system for controlling intelligent power consumption management of a station power supply in the first aspect, and the method for controlling intelligent power consumption management of a station power supply includes:
the method comprises the steps of obtaining a bus detection module to detect three-phase bus current and determining three-phase unbalanced current according to the three-phase bus current;
acquiring load current on each feeder line under each phase line detected by the feeder line detection module, and determining electric power for load according to the load current;
the central processing module determines priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sends the priority electricity utilization phase information to the priority phase prompting module so that the priority phase prompting module prompts a priority electricity utilization phase in three phases;
and the central processing module determines a power-off instruction to the power-on control module according to the three-phase unbalanced current, the preferential power-on phase information and the load power-on power on each feeder under each phase line so that the power-on control module cuts off the power supply of the corresponding feeder according to the power-off instruction.
Optionally, the central processing module determines the priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, specifically:
when the three-phase unbalanced current is larger than the three-phase unbalanced current of the preset bus, determining preferential electricity utilization phase information according to the included angle between the three-phase bus current and the three-phase unbalanced current.
Optionally, the central processing module determines a power outage instruction according to the three-phase unbalanced current, the preferential power utilization phase information and the load power utilization power on each feeder under each phase line, specifically:
when the three-phase unbalanced current is larger than the three-phase unbalanced current of the preset bus, and the preset phase in the priority power utilization phase information is a load phase, if the power utilization of the load on the preset feeder below the preset phase is larger than the maximum power utilization of the load, outputting a power failure instruction.
According to the embodiment of the invention, the three-phase bus current is detected by the bus detection module, and the three-phase unbalanced current is determined according to the three-phase bus current; the feeder line detection module detects load current on each feeder line under each phase line and determines electric power for load according to the load current; the central processing module determines preferential electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sends the preferential electricity utilization phase information to the preferential phase prompting module, and the preferential phase prompting module prompts a preferential electricity utilization phase in three phases; and meanwhile, the central processing module determines a power-off instruction to the power-on control module according to the three-phase unbalanced current, the preferential power-on phase information and the load power-on power on each feeder under each phase line, and the power-on control module cuts off the power supply of the corresponding feeder according to the power-off instruction, so that the safety power utilization of the station power supply is comprehensively improved.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent power management system for a station power supply according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific structure of an intelligent power management system for a station power supply according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a station power intelligent electricity management control method according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of an intelligent power management system for a station power supply according to an embodiment of the present invention, where, as shown in fig. 1, the system includes: the system comprises a bus detection module 10, a feeder line detection module 20, a central processing module 30, a power utilization control execution module 40 and a priority phase prompt module 50; the bus detection module 10 is in communication connection with the central processing module 30; the feeder line detection module 20 is in communication connection with the central processing module 30; the central processing module 30 is in communication connection with the electricity utilization control execution module 40; the central processing module 30 is in communication connection with the priority phase prompting module 50; the bus detection module 10 is used for detecting three-phase bus currents and determining three-phase unbalanced currents according to the three-phase bus currents; the feeder line detection module 20 is used for detecting the load current on each feeder line under each phase line and determining the electric power for the load according to the load current; the central processing module 30 is configured to determine preferential electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and send the preferential electricity utilization phase information to the preferential phase prompting module 50 so that the preferential phase prompting module 50 prompts the preferential electricity utilization phase in the three phases; the central processing module 30 is further configured to determine a power outage instruction to the power utilization control execution module 40 according to the three-phase unbalanced current, the preferential power utilization phase information, and the power utilization power of the load on each feeder under each phase line, so that the power utilization control execution module 40 cuts off the power supply of the corresponding feeder according to the power outage instruction.
The three-phase bus current is the current of A phase, B phase and C phase output by the three-phase bus power supply; the three-phase unbalanced current is the sum of current vectors of the phase A, the phase B and the phase C; each phase line of the three-phase bus power supply comprises a plurality of feeder branches; the feeder line detection module 20 can respectively detect load currents on the feeder lines under the phase lines and respectively determine the load power consumption on the feeder lines under the phase lines according to the load currents;
the priority electricity utilization phase information is phase sequence information of the A phase, the B phase and the C phase which can be accessed to the load preferentially; the priority phase electrical phase information is exemplified as a priority a phase access load, next a C phase access load, and next a B phase access load;
the power utilization control execution module 40 can disconnect any feeder under each phase line to supply power, and in this embodiment, the power supply of the corresponding feeder under the corresponding phase line is disconnected according to the power outage instruction.
In the embodiment of the invention, the three-phase bus current is detected by the bus detection module 10, and the three-phase unbalanced current is determined according to the three-phase bus current; detecting load current on each feeder line under each phase line through the feeder line detection module 20, and determining load power according to the load current; the central processing module 30 determines the priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sends the priority electricity utilization phase information to the priority phase prompting module 50, and the priority phase prompting module 50 prompts the priority electricity utilization phase in the three phases, so that the management prompt of the priority electricity utilization of the station power supply is realized; and the central processing module 30 also determines a power-off instruction to the power utilization control execution module 40 according to the three-phase unbalanced current, the preferential power utilization phase information and the power utilization power of the load on each feeder under each phase line, the power utilization control execution module 40 cuts off the power supply of the corresponding feeder line according to the power outage instruction, so that safety accidents caused by overlarge power utilization load of the station power supply are avoided by comprehensively monitoring the power utilization load of the load on each feeder line, and the safety power utilization of the station power supply is comprehensively improved.
Optionally, fig. 2 is a schematic diagram of a specific structure of an intelligent power consumption management system for a station power supply according to an embodiment of the present invention, as shown in fig. 2, a central processing module 30 includes: a storage unit 31, a first CPU control unit 32, and a first communication unit 33; a storage unit 31 for storing a preset bus three-phase unbalanced current; storing the maximum power of the load on each feed line under each phase line; the first CPU control unit 32 is configured to determine preferential power phase information according to an included angle between the three-phase bus current and the three-phase unbalanced current when the three-phase unbalanced current is greater than the preset bus three-phase unbalanced current; the first CPU control unit 32 is further configured to output a power outage instruction if the load power on the preset feeder under the preset phase is greater than the load maximum power when the preset phase in the priority power phase information is the load phase; a first communication unit 33, configured to send the priority electricity utilization phase information to the priority phase prompting module 50; and also for sending a power outage instruction to the power utilization control execution module 40.
The method comprises the steps that three-phase unbalanced current of a bus is preset to be a fixed value of a low-voltage zero-current protection action for a three-phase bus power supply incoming line switch or a station variable-height switch for tripping; the maximum electric power of the load on each feeder under each phase line is the rated power allowed by the feeder air switch on each feeder under each phase line;
the first CPU control unit 32 may specifically determine preferential power phase information according to an included angle between the three-phase bus current and the three-phase unbalanced current; if the included angle between any one phase of bus current in the three-phase bus current and the three-phase unbalanced current is larger, the corresponding front bus current is smaller, and the phase can be used as a preferential electricity phase and can be used preferentially, so that the three-phase unbalanced current is reduced; conversely, if the included angle between any one phase of bus current in the three-phase bus current and the three-phase unbalanced current is smaller, the corresponding previous bus current is larger, and the phase can be used as the second priority electricity utilization phase.
The first CPU control unit 32 further specifically, when the three-phase unbalanced current is greater than the three-phase unbalanced current of the preset bus, and the preset phase in the preferential power utilization phase information is a load phase, that is, the smaller the included angle between the bus current of the phase and the three-phase unbalanced current is, if the power consumption of the load on the preset feeder line under the preset phase is greater than the maximum power consumption of the load, the power failure instruction is output, and the power utilization execution control module 40 cuts off the power supply of the preset feeder line according to the power failure instruction, so as to play a role in protecting the preset feeder line, and reduce the three-phase unbalanced current; illustratively, the C-phase is a load phase, the load power on the fifth feeder below the C-phase is greater than the load maximum power, then a power-off command is output, and the power consumption execution control module 40 cuts off the power supply to the fifth feeder according to the power-off command. Of course, if the load power used by the other two feeders except the fifth feeder below the C-phase line is greater than the load maximum power, the power supply on the other feeders needs to be disconnected.
Optionally, with continued reference to fig. 2, the storage unit 31 is further configured to store the power outage priority on each feeder below each phase line; the first CPU control unit 32 is further configured to output a power-off instruction according to the power-off priority and the power consumption of the load on the preset feeder under the preset phase when the preset phase in the priority power consumption phase information is the load phase.
In the three-phase power supply, even if the power supply on some feeder lines under some phase lines is overloaded, the power supply is better than the special working condition that the power supply load is necessary; the power-off priority of each feeder under each phase line stored in the storage unit 31 is the power-off sequencing of each feeder under each phase line manually specified according to the power supply requirement under a specific working condition; the first CPU control unit 32 specifically outputs a power-off instruction according to the power-off priority and the power consumption of the load on the preset feeder under the preset phase when the three-phase unbalanced current is greater than the preset bus three-phase unbalanced current and the preset phase in the priority power consumption phase information is the load phase, so that the safe power consumption of the station power supply can be improved on the premise of meeting the specific necessary power supply requirement.
Optionally, with continued reference to fig. 2, the feeder line detection module 20 includes a load current acquisition circuit 21, an electrical isolation circuit 22, a filter circuit 23, an amplifying circuit 24, a second CPU control unit 25, and a second communication unit 26; a load current acquisition circuit 21 for detecting a load voltage on each feeder line under each phase line; an electrical isolation circuit 22 for isolating a load voltage; a filter circuit 23 for filtering the isolated load voltage; an amplifying circuit 24 for amplifying the filtered load voltage signal and outputting the amplified load voltage signal to the second CPU control unit; the second CPU control unit 25 is configured to determine the load electric power from the amplified load voltage signal, and transmit the load electric power to the central processing module 30 through the second communication unit 26.
Wherein, the load current acquisition single path 21 can be a resistance unit; the electrical isolation circuit 22 may be an isolation transformer unit; the filter circuit 23 may be a combination unit of a resistor and an inductor; the amplifying circuit 24 may be an amplifier; it will be appreciated that the present embodiment is not particularly limited to the above-described circuits. The second CPU control unit 25 determines the load electric power from the amplified load voltage signal, and transmits the load electric power to the first CPU control unit 32 in the central processing module 30 through the second communication unit 26.
Optionally, with continued reference to fig. 2, the priority phase prompting module 50 includes a third communication unit 51, a third CPU control unit 52, and a signal indicating unit 53; a third communication unit 51 for receiving the priority phase electricity consumption outputted from the central processing module 30 (i.e., the first communication unit 33 in the central processing module 30), and transmitting the priority phase electricity consumption to the third CPU control unit 52; a third CPU control unit 52 for outputting a priority electricity consumption phase instruction to the signal instruction unit 53 according to the priority phase electricity consumption information; and a signal indicating unit 53 for indicating the priority power utilization phase among the three phases.
Wherein, the signal indication unit 53 may be an LED unit, and the LED unit may display red, green, and yellow; the priority power utilization phase information can be prompted in red, green and yellow or in red, green and yellow, various colors are always bright, various colors are flashing and the like; this embodiment is not particularly limited.
Optionally, with continued reference to fig. 2, the power consumption control execution module 40 includes a fourth communication unit 41, a fourth CPU control unit 42, and a control switch driving circuit 43; a fourth communication unit 41, configured to receive a power-off instruction output by the central processing module 30 (i.e., the first communication unit 33 in the central processing module 30), and send the power-off instruction to the fourth CPU control unit 42; a fourth CPU control unit 42 for outputting a power supply masking and authorizing command to the control switch driving circuit 43 according to the power-off command and the key password inputted by the user; the switch driving circuit 43 is controlled for driving the power supply of the corresponding feeder line to be disconnected.
The key password input by the user is verification information confirmed by the user; the fourth CPU control unit 42 outputs a shielding power supply authorization command to the control switch driving circuit 43 specifically according to the power-off command and the key password input by the user, so as to achieve the protection of the feeder line under the condition of meeting the specific power requirement of the user.
The control switch driving circuit 43 can specifically cut off the power supply of the corresponding feeder line by controlling the on/off driving of the control switch; when the control switch is a normal switch, the control switch driving circuit 43 is driven by adopting an I/O output driving mode, and when the control switch is an intelligent switch, the control switch driving circuit 43 is driven by adopting a communication mode; the driving method of the present embodiment is not particularly limited.
Optionally, with continued reference to fig. 2, the central processing module 30 is further configured to obtain the preset power consumption of the user when the three-phase unbalanced current is greater than the preset bus three-phase unbalanced current and a specific phase in the preferential power consumption phase information is the preferential power consumption phase; when the pre-power consumption of the user and the power consumption of the load on the specific feeder line under the specific phase are larger than the maximum power consumption of the load, outputting an unavailable power consumption instruction to the power consumption control module, and cutting off the power supply of the specific feeder line according to the power failure instruction.
The central processing module 30 is specifically configured to obtain the preset power consumption of the user when the three-phase unbalanced current is greater than the preset bus three-phase unbalanced current and the specific phase in the priority power consumption phase information is the priority power consumption phase, that is, when the included angle between any one phase of bus current in the three-phase bus current and the three-phase unbalanced current is the largest; when the pre-power consumption of the user and the power consumption of the load on the specific feeder line under the specific phase are larger than the maximum power consumption of the load, outputting an unavailable power consumption instruction to the power consumption control module, and disconnecting the power supply of the specific feeder line by the power consumption control execution module 40 according to the power failure instruction, so that the power consumption requirement of the user is not met; if the power consumption of the load on the specific feed line is smaller than the maximum power consumption of the load under the preset power consumption and specific phase of the user, the unavailable power command is not output to the power consumption control execution module, so that the power consumption requirement of the user can be met; thus, the pre-judgment is made before electricity is used, and overload of electricity is avoided.
Based on the same inventive concept, the embodiment of the invention also provides a station power supply intelligent electricity management control method, and the method is also applied to the station power supply intelligent electricity management control system of the embodiment, and fig. 3 is a flow diagram of the station power supply intelligent electricity management control method provided by the embodiment of the invention; as shown in fig. 3, the method comprises the steps of:
s110, the acquisition bus detection module detects three-phase bus current and determines three-phase unbalanced current according to the three-phase bus current.
S120, acquiring load currents on the feeder lines under the phase lines detected by the feeder line detection module, and determining the electric power for the load according to the load currents.
And S130, the central processing module determines the priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sends the priority electricity utilization phase information to the priority phase prompting module so that the priority phase prompting module prompts the priority electricity utilization phase in the three phases.
And S140, the central processing module determines a power-off instruction to the power-on control module according to the three-phase unbalanced current, the preferential power-on phase information and the power-on power of the load on each feeder under each phase line so as to disconnect the power supply of the corresponding feeder by using the power-off instruction.
According to the scheme, the central processing module determines the priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sends the priority electricity utilization phase information to the priority phase prompting module, and the priority phase prompting module prompts the priority electricity utilization phase in the three phases; and meanwhile, the central processing module determines a power-off instruction to the power-on control execution module according to the three-phase unbalanced current, the preferential power-on phase information and the load power-on power on each feeder line under each phase line, and the power-on control execution module cuts off the power supply of the corresponding feeder line according to the power-off instruction, so that the safety power utilization of the station power supply is comprehensively improved.
Optionally, the central processing module determines preferential electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, specifically: when the three-phase unbalanced current is larger than the three-phase unbalanced current of the preset bus, determining preferential electricity utilization phase information according to the included angle between the three-phase bus current and the three-phase unbalanced current.
Optionally, the central processing module determines a power-off instruction according to the three-phase unbalanced current, the preferential power utilization phase information and the load power utilization power on each feeder under each phase line, specifically: when the three-phase unbalanced current is larger than the three-phase unbalanced current of the preset bus, the preset phase in the priority power utilization phase information is a load phase, and if the load power utilization power on the preset feed line under the preset phase is larger than the load maximum power utilization power, a power failure instruction is output.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. An intelligent power management system for a station power supply, comprising: the device comprises a bus detection module, a feeder detection module, a central processing module, a power utilization control execution module and a priority phase prompt module;
the bus detection module is in communication connection with the central processing module; the feeder line detection module is in communication connection with the central processing module; the central processing module is in communication connection with the power utilization control execution module; the central processing module is in communication connection with the priority phase prompting module;
the bus detection module is used for detecting three-phase bus current and determining three-phase unbalanced current according to the three-phase bus current;
the feeder line detection module is used for detecting load current on each feeder line under each phase line and determining electric power for load according to the load current;
the central processing module is used for determining priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sending the priority electricity utilization phase information to the priority phase prompting module so that the priority phase prompting module prompts a priority electricity utilization phase in three phases;
and the central processing module is also used for determining a power-off instruction to the power-on control execution module according to the three-phase unbalanced current, the preferential power-on phase information and the load power on each feeder under each phase line so that the power-on control execution module cuts off the power supply of the corresponding feeder according to the power-off instruction.
2. The station power intelligent electricity management system according to claim 1, wherein the central processing module comprises: the device comprises a storage unit, a first CPU control unit and a first communication unit;
the storage unit is used for storing three-phase unbalanced currents of a preset bus; storing the maximum power of the load on each feed line under each phase line;
the first CPU control unit is used for determining preferential electricity utilization phase information according to the included angle between the three-phase bus current and the three-phase unbalanced current when the three-phase unbalanced current is larger than the preset bus three-phase unbalanced current;
the CPU control unit is further used for outputting a power-off instruction if the load power consumption on the preset feeder below the preset phase is larger than the load maximum power consumption when the three-phase unbalanced current is larger than the preset bus three-phase unbalanced current and the preset phase in the priority power consumption phase information is the load phase;
the first communication unit is used for sending the priority electricity utilization phase information to the priority phase prompt module; and the power-off instruction is also used for sending the power-on control execution module.
3. The intelligent power management system for a station according to claim 2, wherein the storage unit is further configured to store a power outage priority on each feeder under each phase line;
and the first CPU control unit is further used for outputting a power-off instruction according to the power-off priority and the power-on power consumption of the load on a preset feed line under the preset phase when the three-phase unbalanced current is larger than the preset bus three-phase unbalanced current and the preset phase in the priority power-on phase information is a load phase.
4. The intelligent power management system for a station power supply according to claim 1, wherein the feeder line detection module comprises a load current acquisition circuit, an electrical isolation circuit, a filter circuit, an amplifying circuit, a second CPU control unit and a second communication unit;
the load current acquisition circuit is used for detecting load voltage on each feed line under each phase line; the electric isolation circuit is used for isolating the load voltage; the filter circuit is used for filtering the isolated load voltage; the amplifying circuit is used for amplifying the filtered load voltage signal and outputting the amplified load voltage signal to the second CPU control unit;
the second CPU control unit is used for determining the electric power for the load according to the amplified load voltage signal and sending the electric power for the load to the central processing module through the second communication unit.
5. The station power intelligent electricity management system according to claim 1, wherein the priority phase prompt module comprises a third CPU control unit, a third communication unit and a signal indication unit;
the third communication unit is used for receiving the priority phase electricity consumption information output by the central processing module and sending the priority phase electricity consumption information to the third CPU control unit;
the third CPU control unit is used for outputting a priority electricity utilization phase indication instruction to the signal indication unit according to the priority phase electricity utilization phase information;
the signal indicating unit is used for prompting the priority electricity utilization phase in the three phases.
6. The station power intelligent electricity management system according to claim 1, wherein the electricity control execution module comprises a fourth CPU control unit, a fourth communication unit and a control switch driving circuit;
the fourth communication unit is used for receiving the power-off instruction output by the central processing module and sending the power-off instruction to the fourth CPU control unit;
the fourth CPU control unit is used for outputting a shielding power supply authorization instruction to the control switch driving circuit according to the power-off instruction and a key password input by a user;
and the control switch driving circuit is used for driving and disconnecting the power supply of the corresponding feeder line.
7. The intelligent power management system for a station power supply according to claim 2, wherein the central processing module is further configured to obtain a pre-user power when the three-phase unbalanced current is greater than the pre-set bus three-phase unbalanced current and a specific phase in the pre-power information is a pre-power phase;
and outputting an unavailable electricity instruction to the electricity consumption control module to disconnect the power supply of the specific feeder line according to the power-off instruction when the preset electricity consumption power of the user and the load electricity consumption power of the specific feeder line under the specific phase are larger than the maximum load electricity consumption power.
8. A station power supply intelligent electricity management control method, characterized in that it is applied to the station power supply intelligent electricity management control system according to any one of the above claims 1 to 7, and the station power supply intelligent electricity management control method comprises:
the method comprises the steps of obtaining a bus detection module to detect three-phase bus current and determining three-phase unbalanced current according to the three-phase bus current;
acquiring load current on each feeder line under each phase line detected by the feeder line detection module, and determining electric power for load according to the load current;
the central processing module determines priority electricity utilization phase information according to the three-phase bus current and the three-phase unbalanced current, and sends the priority electricity utilization phase information to the priority phase prompting module so that the priority phase prompting module prompts a priority electricity utilization phase in three phases;
and the central processing module determines a power-off instruction to the power-on control module according to the three-phase unbalanced current, the preferential power-on phase information and the load power-on power on each feeder under each phase line so that the power-on control module cuts off the power supply of the corresponding feeder according to the power-off instruction.
9. The intelligent power management control method for a station power supply according to claim 8, wherein the central processing module determines preferential power phase information according to the three-phase bus current and the three-phase unbalanced current, specifically:
when the three-phase unbalanced current is larger than the three-phase unbalanced current of the preset bus, determining preferential electricity utilization phase information according to the included angle between the three-phase bus current and the three-phase unbalanced current.
10. The intelligent power management control method for a station power supply according to claim 9, wherein the central processing module determines a power-off instruction according to the three-phase unbalanced current, the preferential power utilization phase information and the load power utilization power on each feeder line under each phase line, specifically:
when the three-phase unbalanced current is larger than the three-phase unbalanced current of the preset bus, and the preset phase in the priority power utilization phase information is a load phase, if the power utilization of the load on the preset feeder below the preset phase is larger than the maximum power utilization of the load, outputting a power failure instruction.
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