CN106787137B - Intelligent control system for medium-voltage power supply vehicle for uninterrupted power supply - Google Patents
Intelligent control system for medium-voltage power supply vehicle for uninterrupted power supply Download PDFInfo
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- CN106787137B CN106787137B CN201611214967.5A CN201611214967A CN106787137B CN 106787137 B CN106787137 B CN 106787137B CN 201611214967 A CN201611214967 A CN 201611214967A CN 106787137 B CN106787137 B CN 106787137B
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The intelligent control system for the medium-voltage power supply vehicle is used for supplying power uninterruptedly, the control unit (2) detects voltage, frequency and phase information of a generator set and a power grid of the power supply vehicle through the detection unit (1), and sends the information to the monitoring unit (5) through the communication unit (4); the monitoring unit (5) sends parallel operation and grid connection instruction information to the control unit (2) through the communication unit (4), and the control unit (2) controls the execution unit (3) to finish parallel operation, primary grid connection and secondary grid connection work according to the instruction information; according to the invention, through automatically collecting information of the medium-voltage power supply vehicle generator set and the power grid, the voltage and phase information of the power supply vehicle generator set is controlled, and the operation of parallel operation, primary grid connection and secondary grid connection is automatically selected at the moment. Firstly, the time of parallel operation and grid connection is accurate, so that the damage to equipment caused by phase deviation and voltage difference due to inaccurate parallel operation and grid connection time is avoided, secondly, the personnel is not required to be on site, and the possible personal injury is avoided.
Description
Technical Field
The invention relates to an intelligent control system for a medium-voltage power supply vehicle for uninterrupted power supply, and belongs to the technical field of power supply control.
Background
With the development of economy and society, people have higher and higher requirements on electricity quality. Some electric equipment in units and industries needs to operate continuously for 24 hours. However, the electrical equipment to which power is supplied is required to be regularly overhauled and replaced. The medium-voltage power supply vehicle is equipment for providing emergency power supply instead of a power grid during maintenance of power equipment. When the medium-voltage power supply vehicle is used for supplying power, the medium-voltage power supply vehicle is required to have parallel operation and parallel operation functions, including the functions of primary parallel operation and secondary parallel operation of a single machine, primary parallel operation and secondary parallel operation, and the like (when line maintenance is carried out, the power supply vehicle is required to be connected to the power grid before power failure of the power grid for ensuring uninterrupted power supply to a load, the power supply vehicle and the power grid supply simultaneously supply power to the load, the primary parallel operation is required, when the line maintenance is finished, the power supply vehicle is required to be connected with a power grid on the overhauled side again for ensuring that the power supply of the power grid is synchronous with the power supply of the power supply vehicle, the secondary parallel operation is required, the load supplied by one power supply vehicle cannot meet the requirement of load use, and the power supply vehicle is required to be connected with another power supply vehicle in parallel for expanding capacity and then supplying power to the load for parallel operation). In the prior art, the operation of parallel operation, primary grid connection and secondary grid connection is completed by manual control, and when the phases of the power supply vehicle and the power supply vehicle are consistent (visual inspection is consistent) with each other and the power supply vehicle and the power grid are observed by visual inspection on site by a first line of personnel, a series of switching operation is performed to complete parallel operation or grid connection. The problems are as follows: on one hand, the parallel operation and grid connection time is inaccurate, and the asynchronous phase and the voltage deviation can cause potential safety hazards to electric equipment; secondly, the parallel operation and the grid connection operation are complex in procedure and high in environmental risk, and the personal safety of on-site operators is possibly threatened.
Disclosure of Invention
The invention aims to provide an intelligent control system for a medium-voltage power supply vehicle for uninterrupted power supply, which can automatically collect information such as the phase and voltage of a power grid and the medium-voltage power supply vehicle and automatically complete parallel operation and grid connection work.
In order to achieve the above purpose, the invention provides an intelligent control system for a medium voltage power supply vehicle for uninterrupted power supply, which comprises a detection unit, a control unit, an execution unit, a communication unit and a monitoring unit; the control unit detects voltage, frequency and phase information of the generator set of the power supply vehicle and the power grid through the detection unit, and sends the information to the monitoring unit through the communication unit; the monitoring unit sends instruction information of parallel operation, grid connection and primary grid connection and secondary grid connection to the control unit through the communication unit, and the control unit controls the execution unit to complete parallel operation, grid connection, primary grid connection and secondary grid connection according to the instruction information and the detection information;
the detection unit comprises a first transformer for detecting the voltage and the frequency of the generator set of the vehicle and tracking the phase angle, a second transformer for detecting the voltage and the frequency of the first power grid and tracking the phase angle, and a third transformer for detecting the voltage and the frequency of the second power grid and tracking the phase angle;
the control unit comprises a parallel operation controller, a parallel operation controller and a parallel operation and grid connection selection switch group, wherein the parallel operation controller is used for parallel operation control of the self-vehicle generator set and other generator sets, and the parallel operation controller is used for start-stop control, frequency adjustment, primary grid connection control and secondary grid connection control of the self-vehicle generator set; the grid-connected controller is communicated with the communication unit through the parallel controller;
the parallel operation controller collects the information of the voltage, the frequency and the phase angle of the generator set of the vehicle through the first transformer and transmits the information to the parallel operation controller; the grid-connected controller collects information of voltage, frequency and phase angle of the first power grid through the second transformer, and collects information of voltage, frequency and phase angle of the second power grid through the third transformer;
the parallel operation grid-connected selection switch group comprises a parallel operation grid-connected selection switch, a parallel operation grid-connected selection relay, a first switch cabinet switching-on control relay, a first switch cabinet switching-off control relay, a second switch cabinet switching-on control relay, a second switch cabinet switching-off control relay, a first switch cabinet switching-on coil, a first switch cabinet switching-off coil, a second switch cabinet switching-on coil and a second switch cabinet switching-off coil;
the parallel connection grid-connected selection relay coil and the parallel connection grid-connected selection switch are connected between the 24-volt power supply and the ground in series, and the grid-connected selection relay coil and the grid-connected selection switch are connected between the 24-volt power supply and the ground in series; one end of the first switch cabinet closing control relay coil is connected with a 24-volt power supply, the other end of the first switch cabinet closing control relay coil is divided into two paths, one path is connected with a parallel machine controller through a normally open point of a parallel machine grid connection selection relay, and the other path is connected with a grid connection controller through a normally closed point of the parallel machine grid connection selection relay; one end of a coil of the second switch cabinet closing control relay and one end of a coil of the second switch cabinet opening control relay are connected with a 24-volt power supply, and the other end of the coil of the second switch cabinet opening control relay is connected with a grid-connected controller through a normally open point of the grid-connected selection relay respectively; one end of a closing coil of the first switch cabinet is connected with a 24-volt power supply, and the other end of the closing coil of the first switch cabinet is grounded through a normally open point of a closing control relay of the first switch cabinet; one end of the first switch cabinet switching-off coil is connected with a 24-volt power supply, and the other end of the first switch cabinet switching-off coil is grounded through a normally open point of the first switch cabinet switching-off control relay; one end of a closing coil of the second switch cabinet is connected with a 24-volt power supply, and the other end of the closing coil of the second switch cabinet is grounded through a normally open point of a closing control relay of the second switch cabinet; one end of the second switch cabinet switching-off coil is connected with a 24-volt power supply, and the other end of the second switch cabinet switching-off coil is grounded through a normally open point of a second switch cabinet switching-off control relay;
the second transformer is connected to the grid-connected controller through a normally closed point of the grid-connected selection relay, and the third transformer is connected to the grid-connected controller through a normally open point of the grid-connected selection relay;
the execution unit comprises a first switch cabinet and a second switch cabinet; the first switch cabinet is used for parallel operation and primary grid connection control, and the second switch cabinet is used for secondary grid connection control.
Preferably, the monitoring unit is a personal terminal controller and is interconnected with the communication unit through a mobile communication network and an internet cloud platform.
According to the invention, through automatically collecting the voltage, frequency and phase information of the medium-voltage power supply vehicle generator set and the power grid, and through analysis and comparison, the voltage and phase information of the power supply vehicle generator set is controlled, proper time is automatically selected, and the parallel operation, primary grid connection and secondary grid connection work are automatically controlled. Firstly, the time of parallel operation and grid connection is accurate, so that the damage to equipment caused by phase deviation and voltage difference due to inaccurate parallel operation and grid connection time is avoided, secondly, the personnel is not required to be on site, and the possible personal injury is avoided.
Drawings
Fig. 1 is a functional block diagram of the present invention.
Fig. 2 is a logic block diagram of the signal acquisition control of the present invention.
Fig. 3 is a schematic diagram of the parallel operation grid-connected selection switch set and the arrangement of each signal acquisition transformer.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, an intelligent control system of a medium voltage power supply vehicle for uninterrupted power supply comprises a detection unit 1, a control unit 2, an execution unit 3, a communication unit 4 and a monitoring unit 5; the control unit 2 detects the voltage, frequency and phase information of the generator set of the power supply vehicle and the power grid through the detection unit 1, and sends the information to the monitoring unit 5 through the communication unit 4; the monitoring unit 5 sends the instruction information of parallel operation, grid connection and primary grid connection and secondary grid connection to the control unit 2 through the communication unit 4, and the control unit 2 controls the execution unit 3 to complete the parallel operation, the grid connection and primary grid connection and secondary grid connection according to the instruction information and the detection information;
as shown in fig. 2, the detection unit 1 includes a first transformer 11 for voltage, frequency detection and phase angle tracking of the generator set 31 of the vehicle, a second transformer 12 for voltage, frequency detection and phase angle tracking of the first power grid 62, and a third transformer 13 for voltage, frequency detection and phase angle tracking of the second power grid 63;
description: the first power grid 62 refers to a power grid before maintenance, the second power grid 63 refers to a power grid after maintenance, and the first power grid is basically the same power grid, and access points and access time are different;
as shown in fig. 2, the control unit 2 includes a parallel operation controller 22, a parallel operation controller 23, and a parallel operation selection switch group 24, where the parallel operation controller 22 is used for parallel operation control of the own vehicle generator set 31 and other generator sets, and the parallel operation controller 23 is used for start-stop control, frequency adjustment, primary parallel operation control, and secondary parallel operation control of the own vehicle generator set 31; the grid-connected controller 23 communicates with the communication unit 4 through the parallel controller 22;
description: the parallel operation controller 22 belongs to a special control component of the generator set, such as an IC-NT, and is internally solidified with an automatic synchronization point capturing function and a generator set voltage and rotation speed adjusting function; the grid-connected controller 23 belongs to a special control component of a generator set, such as IG-NT, and is internally solidified with an automatic synchronization point capturing function;
the parallel operation controller 22 collects the information of the voltage, the frequency and the phase angle of the generator set 31 of the vehicle through the first transformer 11 and transmits the information to the parallel operation controller 23; the grid-connected controller 23 collects voltage, frequency and phase information of the first power grid 62 through the second transformer 12, and collects voltage, frequency and phase information of the second power grid 63 through the third transformer 13;
as shown in fig. 3, the parallel operation grid-connected selection switch group 24 includes a parallel operation grid-connected selection switch 91, a grid-connected selection switch 92, a parallel operation grid-connected selection relay 71, a grid-connected selection relay 72, a first switch cabinet switch-on control relay 73, a first switch cabinet switch-off control relay 74, a second switch cabinet switch-on control relay 75, a second switch cabinet switch-off control relay 76, a first switch cabinet switch-on coil 81, a first switch cabinet switch-off coil 82, a second switch cabinet switch-on coil 83, and a second switch cabinet switch-off coil 84;
as shown in fig. 3, the coil of the parallel operation grid-connected selection relay 71 and the parallel operation grid-connected selection switch 91 are connected in series between the 24-volt power supply and the ground, and the grid-connected selection relay 72 and the grid-connected selection switch 92 are connected in series between the 24-volt power supply and the ground; one end of a coil of the first switch cabinet closing control relay 73 is connected with a 24-volt power supply, the other end of the coil is divided into two paths, one path is connected with the parallel machine controller 22 through a normally open point 71-1 of the parallel machine grid-connected selection relay 71, and the other path is connected with the grid-connected controller 23 through a normally closed point 71-2 of the parallel machine grid-connected selection relay 71; one end of a coil of the second switch cabinet closing control relay 75 and one end of a coil of the second switch cabinet opening control relay 76 are connected with a 24-volt power supply, and the other end of the coil is connected with the grid-connected controller 23 through a first normally open point 72-1 of the grid-connected selection relay 72; one end of the first switch cabinet closing coil 81 is connected with a 24-volt power supply, and the other end of the first switch cabinet closing coil is grounded through a normally open point 73-1 of the first switch cabinet closing control relay 73; one end of the first switch cabinet switching-off coil 82 is connected with a 24-volt power supply, and the other end of the first switch cabinet switching-off coil is grounded through a normally open point 74-1 of the first switch cabinet switching-off control relay 74; one end of the second switch cabinet closing coil 83 is connected with a 24-volt power supply, and the other end of the second switch cabinet closing coil is grounded through a normally open point 75-1 of the second switch cabinet closing control relay 75; one end of the second switch cabinet switching-off coil 84 is connected with a 24-volt power supply, and the other end of the second switch cabinet switching-off coil is grounded through a normally open point 75-1 of the second switch cabinet switching-off control relay 76;
as shown in fig. 3, the second transformer 12 is connected to the grid-connected controller 23 through the normally closed point 72-2 of the grid-connected selection relay 72, and the third transformer 13 is connected to the grid-connected controller 23 through the second normally open point 72-3 of the grid-connected selection relay 72;
as shown in fig. 2, the execution unit 3 comprises a first switch cabinet 32 and a second switch cabinet 33; the first switch cabinet 32 is used for parallel operation and primary grid connection control, and the second switch cabinet 33 is used for secondary grid connection control.
According to the invention, through automatically collecting the voltage, frequency and phase information of the medium-voltage power supply vehicle generator set and the power grid, and through analysis and comparison, the voltage and phase information of the power supply vehicle generator set is controlled, proper time is automatically selected, and the parallel operation, primary grid connection and secondary grid connection work are automatically controlled. Firstly, the time of parallel operation and grid connection is accurate, so that the damage to equipment caused by phase deviation and voltage difference due to inaccurate parallel operation and grid connection time is avoided, secondly, the personnel is not required to be on site, and the possible personal injury is avoided.
Preferably, the monitoring unit 5 is a personal terminal controller, and is interconnected with the communication unit through a mobile communication network and an internet cloud platform. The monitoring personnel can realize the parallel operation and the parallel operation monitoring operation from a long distance. Personnel can be free from the limit of the operation place, and can operate and control while watching the environment by carrying the personal terminal controller and placing the personal terminal controller at the periphery of the medium-voltage power supply vehicle.
The working process is as follows:
when the parallel operation is performed, the parallel operation grid-connected selection switch 91 is switched to a parallel operation function (the parallel operation is performed when the switch is closed and the parallel operation is performed when the switch is opened), the parallel operation grid-connected selection relay 71 is electrified and closed, and coils of the first switch cabinet switch-on control relay 73 and the first switch cabinet switch-off control relay 74 are connected to the parallel operation controller 22 through normally open points of the parallel operation grid-connected selection relay 71. When the monitoring unit 5 gives a parallel operation control instruction, the instruction is transmitted to the parallel operation controller 22 through the communication unit 4. The parallel operation controller 22 compares the information of voltage, frequency, phase angle and the like acquired by the first transformer 11 with the information of voltage, frequency, phase angle and the like acquired by the to-be-parallel operation controller, the parallel operation controller 22 gives a closing signal after the parallel operation condition is met, the first switch cabinet closing control relay 73 is closed (the connection of the coil of the first switch cabinet closing control relay 73 to the parallel operation controller 22 is at a low level), the normally open point 73-1 is closed, the closing is used for the closing of the first switch cabinet closing coil 81, and the closing of the first switch cabinet 32 is completed.
At parallel operation disconnection, the monitoring unit 5 gives a parallel operation disconnection instruction, which is transmitted to the parallel operation controller 22 through the communication unit 4. The parallel operation controller 22 gives a switching-off signal (the switching-on of the coil of the first switch cabinet switching-off control relay 74 to the parallel operation controller 22 is at a low level), the first switch cabinet switching-off control relay 74 is closed, the normally open point 74-1 of the switching-off control relay is closed, the first switch cabinet switching-off coil 82 is closed, the first switch cabinet 32 is switched off, and the parallel operation disconnection is completed.
When the parallel operation is connected in one time, the parallel operation grid connection selection switch 91 is switched to a grid connection function, the parallel operation grid connection selection relay 71 is powered off and reset, the normally closed point 71-2 of the parallel operation grid connection selection relay is connected, and the first switch cabinet switch-on control relay 73 and the first switch cabinet switch-off control relay 74 are switched to the grid connection controller 23 through the normally closed point 71-2 of the parallel operation grid connection selection relay 71; the grid-connected selection switch 92 is switched to a primary grid-connected function (the switch is switched to primary grid-connected and the switch is switched to secondary grid-connected), the grid-connected selection relay 72 is powered off and reset, and the second transformer 12 is connected to the grid-connected controller 23 through the normally-closed point 72-2 of the grid-connected selection relay 72. The monitoring unit 5 gives a primary grid-connected instruction, the instruction is transmitted to the grid-connected controller 23 through the communication unit 4, the grid-connected controller 23 collects information such as voltage, frequency and phase angle of the generator set 31 of the self-vehicle through the first mutual inductor 11, the information such as voltage, frequency and phase angle of the first power grid 62 collected through the second mutual inductor 12 is compared, the grid-connected controller 23 simultaneously controls the generator set 31 of the self-vehicle to adjust the phase, after the grid-connected condition is met, the grid-connected controller 23 gives a closing signal, the first switch cabinet closing control relay 73 is controlled to be closed, the normally open point 73-1 of the first switch cabinet closing relay 81 is closed, the first switch cabinet 32 is closed, and the primary grid connection is completed;
during secondary grid connection, the parallel connection grid connection selection switch 91 is switched to a grid connection function, the parallel connection grid connection selection relay 71 is powered off and reset, the normally closed point 71-2 of the parallel connection grid connection selection relay is connected, and the first switch cabinet switching-on control relay 73 and the first switch cabinet switching-off control relay 74 are switched to the grid connection controller 23 through the normally closed point 71-2 of the parallel connection grid connection selection relay 71; the grid-connected selection switch 92 is switched to the secondary grid connection, the grid-connected selection relay 72 is electrified, and the third transformer 13 is connected to the grid-connected controller 23 through the second normally open point 72-3 of the grid-connected selection relay 72. The monitoring unit 5 gives a secondary grid-connected control instruction, the instruction is transmitted to the grid-connected controller 23 through the communication unit 4 and the parallel operation controller 22, the grid-connected controller 23 compares the information such as the voltage, the frequency and the phase angle of the generator set 31 of the vehicle acquired by the first transformer 11 with the information such as the voltage, the frequency and the phase angle of the second power grid 63 acquired by the third transformer 13, after the grid-connected condition is met, the grid-connected controller 23 gives a switching-on signal, the second switch cabinet switching-on control relay 75 is closed, the normally open point 75-1 of the second switch cabinet switching-on control relay is closed, the second switch cabinet switching-on coil 83 is closed, the second switch cabinet 33 is closed, and the secondary grid connection is completed;
the first grid connection and the second grid connection are separated, reverse operation is carried out according to the first grid connection and the second grid connection sequence, the second switch cabinet 33 and the first switch cabinet 32 are separated by controlling the second switch cabinet separating coil 84 and the first switch cabinet separating coil 82 through the second switch cabinet separating control relay 76 and the first switch cabinet separating control relay 74 respectively, and the separation is completed.
Claims (2)
1. An intelligent control system for a medium-voltage power supply vehicle for uninterrupted power supply is characterized by comprising a detection unit (1), a control unit (2), an execution unit (3), a communication unit (4) and a monitoring unit (5); the control unit (2) detects voltage, frequency and phase information of the generator set of the power supply vehicle and the power grid through the detection unit (1), and sends the information to the monitoring unit (5) through the communication unit (4); the monitoring unit (5) sends the instruction information of parallel operation, primary parallel operation and secondary parallel operation to the control unit (2) through the communication unit (4), and the control unit (2) controls the execution unit (3) to complete the parallel operation, the primary parallel operation and the secondary parallel operation according to the instruction information and the detection information;
the detection unit (1) comprises a first transformer (11) for voltage, frequency detection and phase angle tracking of the generator set (31) of the vehicle, a second transformer (12) for voltage, frequency detection and phase angle tracking of a first power grid (62) and a third transformer (13) for voltage, frequency detection and phase angle tracking of a second power grid (63);
the control unit (2) comprises a parallel operation controller (22), a parallel operation controller (23) and a parallel operation grid connection selection switch group (24), wherein the parallel operation controller (22) is used for parallel operation control of the self-vehicle generator set (31) and other generator sets, and the parallel operation controller (23) is used for start-stop control, frequency adjustment, primary grid connection control and secondary grid connection control of the self-vehicle generator set (31); the grid-connected controller (23) is communicated with the communication unit (4) through the parallel controller (22);
the parallel operation controller (22) collects the information of the voltage, the frequency and the phase angle of the generator set (31) of the vehicle through the first mutual inductor (11) and transmits the information to the parallel operation controller (23); the grid-connected controller (23) collects information of voltage, frequency and phase angle of the first power grid (62) through the second transformer (12), and collects information of voltage, frequency and phase angle of the second power grid (63) through the third transformer (13);
the parallel operation grid-connected selection switch group (24) comprises a parallel operation grid-connected selection switch (91), a grid-connected selection switch (92), a parallel operation grid-connected selection relay (71), a grid-connected selection relay (72), a first switch cabinet switching-on control relay (73), a first switch cabinet switching-off control relay (74), a second switch cabinet switching-on control relay (75), a second switch cabinet switching-off control relay (76), a first switch cabinet switching-on coil (81), a first switch cabinet switching-off coil (82), a second switch cabinet switching-on coil (83) and a second switch cabinet switching-off coil (84);
the parallel operation grid connection selection relay (71) coil and the parallel operation grid connection selection switch (91) are connected between the 24-volt power supply and the ground in series, and the grid connection selection relay (72) coil and the grid connection selection switch (92) are connected between the 24-volt power supply and the ground in series; one end of a coil of the first switch cabinet closing control relay (73) is connected with a 24-volt power supply, the other end of the coil is divided into two paths, one path is connected with a parallel machine controller (22) through a normally open point (71-1) of a parallel machine closing selection relay (71), and the other path is connected with a parallel machine controller (23) through a normally closed point (71-2) of the parallel machine closing selection relay (71); one ends of coils of a second switch cabinet closing control relay (75) and a second switch cabinet opening control relay (76) are connected with a 24-volt power supply, and the other ends of coils are connected with a grid-connected controller (23) through a first normally open point (72-1) of a grid-connected selection relay (72); one end of a first switch cabinet closing coil (81) is connected with a 24-volt power supply, and the other end of the first switch cabinet closing coil is grounded through a normally open point (73-1) of a first switch cabinet closing control relay (73); one end of a first switch cabinet switching-off coil (82) is connected with a 24-volt power supply, and the other end of the first switch cabinet switching-off coil is grounded through a normally open point (74-1) of a first switch cabinet switching-off control relay (74); one end of a second switch cabinet closing coil (83) is connected with a 24-volt power supply, and the other end of the second switch cabinet closing coil is grounded through a normally open point (75-1) of a second switch cabinet closing control relay (75); one end of a second switch cabinet switching-off coil (84) is connected with a 24-volt power supply, and the other end of the second switch cabinet switching-off coil is grounded through a normally open point (76-1) of a second switch cabinet switching-off control relay (76);
the second mutual inductor (12) is connected to the grid-connected controller (23) through a normally closed point (72-2) of the grid-connected selection relay (72), and the third mutual inductor (13) is connected to the grid-connected controller (23) through a second normally open point (72-3) of the grid-connected selection relay (72);
the execution unit (3) comprises a first switch cabinet (32) and a second switch cabinet (33); the first switch cabinet (32) is used for parallel operation and primary grid connection control, and the second switch cabinet (33) is used for secondary grid connection control.
2. The intelligent control system for the medium voltage electric power car for uninterrupted power supply according to claim 1, wherein the monitoring unit (5) is a personal terminal controller and is interconnected with the communication unit (4) through a mobile communication network and an internet cloud platform.
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| CN201611214967.5A CN106787137B (en) | 2016-12-26 | 2016-12-26 | Intelligent control system for medium-voltage power supply vehicle for uninterrupted power supply |
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| CN201611214967.5A CN106787137B (en) | 2016-12-26 | 2016-12-26 | Intelligent control system for medium-voltage power supply vehicle for uninterrupted power supply |
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| CN111478370A (en) * | 2020-04-15 | 2020-07-31 | 贵州电网有限责任公司 | Multi-parallel-machine grid-connected method and system based on non-stop of low-voltage power supply vehicle |
| CN114597937A (en) * | 2022-03-01 | 2022-06-07 | 广东电网有限责任公司广州供电局 | External mobile synchronous power-off grid-connected platform based on low-voltage power supply and method thereof |
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