CN117559629A - Power supply rapid switching starting control system and method based on multi-power supply cooperative control - Google Patents

Power supply rapid switching starting control system and method based on multi-power supply cooperative control Download PDF

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Publication number
CN117559629A
CN117559629A CN202311620403.1A CN202311620403A CN117559629A CN 117559629 A CN117559629 A CN 117559629A CN 202311620403 A CN202311620403 A CN 202311620403A CN 117559629 A CN117559629 A CN 117559629A
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China
Prior art keywords
switch
power supply
incoming line
incoming
bus
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CN202311620403.1A
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Chinese (zh)
Inventor
刘兴
丁宁
李�杰
秦云刚
孟鑫
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Wiscom System Co ltd
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Wiscom System Co ltd
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Priority to CN202311620403.1A priority Critical patent/CN117559629A/en
Publication of CN117559629A publication Critical patent/CN117559629A/en
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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
    • 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

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The invention discloses a power supply rapid switching starting control system and method based on multi-power supply cooperative control, wherein the system comprises a first incoming power supply, a second incoming power supply, a third incoming power supply, an I-section bus, a II-section bus, a sectionalized switch, a rapid switching device, a fault detection unit and a switching control unit, wherein the rapid switching device is used for detecting whether the first incoming power supply, the second incoming power supply and the third incoming power supply have faults or not, and if the faults are detected, corresponding fault signals are sent to the switching control unit; the first inlet switch, the second inlet switch, the third inlet switch and the sectionalizing switch are opened and closed according to the control signals of the switching control unit; the switching control unit obtains a switching control signal according to the corresponding fault signal, sends the switching control signal to the fast switching device, and realizes the switching of the circuit through the fast switching device. The invention ensures that the work load is not stopped due to the failure of the upper power supply, and ensures that the load works reliably, continuously and stably.

Description

Power supply rapid switching starting control system and method based on multi-power supply cooperative control
Technical Field
The invention relates to a fast switching device for standby power supply of an electric power system, which aims at the cooperative multi-mode switching of the power supply of an industrial enterprise power supply fast switching device operating in a multi-working condition operating state.
Background
Due to faults or anomalies of an external power grid or an internal power supply network, power supply interruption or anomalies of metallurgy and petrochemical enterprises with special process requirements are caused, so that equipment is stopped or idled, process flow interruption or waste is caused, and even serious consequences such as scrapping of production equipment are caused. At present, the method for solving the problem of power supply reliability of industrial enterprises is that a primary system adopts two-way or multi-way power supply, and a secondary system adopts a standby power automatic switching device (hereinafter referred to as a standby power automatic switching device) or a two-power industrial enterprise quick switching device. For general industrial enterprises, the automatic switching device can meet the requirements, and enterprises requiring continuous power supply such as petrifaction and metallurgy have a great amount of motor loads, the feedback voltage of the motor enables the bus to be from voltage to non-voltage (the general non-voltage constant value is 20% -35% of the rated voltage), the duration of the action process of the automatic switching device is as long as 1-2 seconds or even longer, at the moment, the motor is cut off in batches or the rotating speed of the motor is seriously reduced, the continuity of the production process is directly influenced, and the quality of products is adversely affected. And at the moment, the power supply is restored to cause larger self-starting current of the motor, so that impact is generated on a power supply network. The quick power switching device for the industrial enterprises of the two power supplies solves the problems that the response action time of the spare power automatic switching device is long and the load of the important industrial enterprises is not sustainable, but when the two power supplies have long-time faults, the industrial enterprises are stopped, and large economic loss is caused. Aiming at uninterrupted and reliable power supply of the motor load of the industrial enterprise, a starting method for switching the rapid power supply of the industrial enterprise based on the multi-power supply cooperative control is provided.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides a power supply rapid switching starting control system and method based on multi-power supply cooperative control. When the fault of the upper-level substation leads to the simultaneous fault of the first incoming line power supply and the second incoming line power supply, or one of the two incoming line power supplies fails, the other incoming line power supply is used for carrying out operation on the two sections of buses after the switching of the fast switching device is successful, and at the moment, the working power supply fails again and the failed incoming line power supply is not recovered, so that the two sections of buses lose power. The quick-cutting device can be quickly powered on with a standby power supply, so that the industrial enterprise load can be continuously and uninterruptedly powered.
The technical scheme is as follows: in order to achieve the above purpose, the invention adopts the following technical scheme:
a power supply fast switching starting control system based on multi-power supply cooperative control comprises a first incoming power supply, a second incoming power supply, a third incoming power supply, an I-section bus, an II-section bus, a sectionalized switch, a fast switching device, a fault detection unit and a switching control unit, wherein:
the first wire inlet power supply is electrically connected with the I-section bus through the first wire inlet switch, the second wire inlet power supply is electrically connected with the II-section bus through the second wire inlet switch, the third wire inlet power supply is electrically connected with the I-section bus through the third wire inlet switch, and the I-section bus is electrically connected with the II-section bus through the sectionalizing switch.
The fast cutting device is used for detecting whether the first incoming line power supply, the second incoming line power supply and the third incoming line power supply have faults or not, and if the faults are detected, corresponding fault signals are sent to the switching control unit. And opening and closing the first inlet switch, the second inlet switch, the third inlet switch and the sectional switch according to the control signal of the switching control unit.
The switching control unit obtains a switching control signal according to the corresponding fault signal, sends the switching control signal to the fast switching device, and realizes the switching of the circuit through the fast switching device.
Preferably: the switching control unit comprises a first switching mode module, a second switching mode module, a third switching mode module, a fourth switching mode module, a fifth switching mode module and a sixth switching mode module, wherein:
the first switching mode module is used for completing charging when the first inlet switch and the second inlet switch are in the combined position and the sectional switch is in the separated position. When the first incoming line power supply fails, the fast switching device is controlled to trip the first incoming line switch and switch on the sectional switch, so that the second incoming line power supply operates with the I-section bus and the II-section bus. If the sectional switch is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
The switching mode two module is used for completing charging when the first inlet switch and the second inlet switch are in the combined position and the sectionalizing switch is in the sectionalizing position. When the second incoming line power supply fails, the fast switching device is controlled to trip the second incoming line switch and switch on the sectional switch, so that the incoming line power supply operates with the I section bus and the II section bus. If the sectional switch is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
The switching mode three module is used for completing charging when the first inlet switch and the second inlet switch are in the combined position and the sectional switch is in the separated position. When the first incoming line power supply fails, the fast switching device is controlled to trip the first incoming line switch, and after the first incoming line switch is determined to trip and the switching conditions are met, a sectional switch command is sent to switch on and switch off, so that the second incoming line power supply is enabled to operate with the I section bus and the II section bus. And if the first incoming power supply is ready, controlling the fast switching device to switch on the first incoming switch. And when the first incoming line switch is closed, switching is finished, and otherwise, the third logic of the incoming line switch is judged to be closed. And if the first incoming line power supply does not have a ready condition, controlling the fast switching device to switch on the third incoming line switch.
The switching mode four modules are used for completing charging when the first inlet switch and the second inlet switch are in the combined position and the sectional switch is in the separated position. When the second incoming line power supply fails, the fast switching device is controlled to trip the second incoming line switch, and after the tripping of the switch is confirmed and the closing condition is met, a sectional switch command is sent to close the sectional switch, so that the incoming line power supply operates with the I section bus and the II section bus. If the primary protection action of the first incoming power supply or the situation that the first line of the incoming power supply is free of current and the voltage of the two bus bars is low occurs, a first command of the wire jumping switch is sent by the fast switching device, the first incoming switch is tripped, whether the second incoming power supply is ready or not is judged first, and if the second incoming power supply is ready, a second command of the wire switching switch is sent, and the fast switching device closes the second incoming switch. And when the second incoming line switch is closed, switching is finished, and otherwise, the third incoming line power supply switching logic is judged to be closed. And if the second incoming line power supply does not have a ready condition, controlling the fast switching device to switch on the third incoming line switch.
The switching mode five modules are used for completing charging when the first inlet switch and the second inlet switch are in the combined position and the sectional switch is in the separated position. When the first incoming line power supply fails, the fast cutting device breaks the first incoming line switch, the sectional switch is closed, if the sectional switch fails to close, the voltage of the section II bus is normal, at this time, the second incoming line power supply operates with the section II bus, and the fast cutting device keeps a ready state. If the sectional switch is refused to be closed and the voltage of the section II bus is lost, the fast switching device is controlled to be closed to the line switch III.
The six modules of the switching mode are used for completing charging when the first inlet switch and the second inlet switch are in the combined position and the sectional switch is in the separated position. The loads connected with the two sections of buses are powered by the first wire inlet power supply and the second wire inlet power supply, if the first wire inlet power supply and the second wire inlet power supply simultaneously fail, the fast switching device is controlled to trip the first wire inlet switch and the second wire inlet switch, and meanwhile the fast switching device is directly connected with the third wire inlet switch.
Preferably: whether the first incoming power supply is ready refers to whether incoming voltage is recovered to be normal or not, and whether the second incoming power supply is ready refers to whether the incoming voltage is recovered to be normal or not.
Preferably: the first inlet wire power supply and the second inlet wire power supply are upper-level power transformation stations, and the third inlet wire power supply is a diesel generator.
Preferably: the simultaneous failure of the first incoming line power supply and the second incoming line power supply means that the I section bus and the II section bus are not pressed, and the line current of the first incoming line power supply and the second incoming line power supply is not flowing.
The power supply rapid switching starting control method based on the multi-power supply cooperative control adopts the power supply rapid switching starting control system based on the multi-power supply cooperative control, and comprises the following switching modes:
mode one: when the first inlet switch and the second inlet switch are in the closed position, the sectionalizing switch is in the separated position, and the device completes charging. When the first incoming line power supply fails, the fast switching device is controlled to trip the first incoming line switch and switch on the sectional switch, so that the second incoming line power supply operates with the I-section bus and the II-section bus. If the sectional switch is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
Mode two: when the first inlet switch and the second inlet switch are in the closed position, the sectionalizing switch is in the separated position, and the device completes charging. When the second incoming line power supply fails, the fast switching device is controlled to trip the second incoming line switch and switch on the sectional switch, so that the incoming line power supply operates with the I section bus and the II section bus. If the sectional switch is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
Mode three: when the first inlet switch and the second inlet switch are in the closed position, the sectionalizing switch is in the separated position, and the device completes charging. When the first incoming line power supply fails, the fast switching device is controlled to trip the first incoming line switch, and after the first incoming line switch is determined to trip and the switching conditions are met, a sectional switch command is sent to switch on and switch off, so that the second incoming line power supply is enabled to operate with the I section bus and the II section bus. And if the first incoming power supply is ready, controlling the fast switching device to switch on the first incoming switch. And when the first incoming line switch is closed, switching is finished, and otherwise, the third logic of the incoming line switch is judged to be closed. And if the first incoming line power supply does not have a ready condition, controlling the fast switching device to switch on the third incoming line switch.
Mode four: when the first inlet switch and the second inlet switch are in the closed position, the sectionalizing switch is in the separated position, and the device completes charging. When the second incoming line power supply fails, the fast switching device is controlled to trip the second incoming line switch, and after the tripping of the switch is confirmed and the closing condition is met, a sectional switch command is sent to close the sectional switch, so that the incoming line power supply operates with the I section bus and the II section bus. If the primary protection action of the first incoming power supply or the situation that the first line of the incoming power supply is free of current and the voltage of the two bus bars is low occurs, a first command of the wire jumping switch is sent by the fast switching device, the first incoming switch is tripped, whether the second incoming power supply is ready or not is judged first, and if the second incoming power supply is ready, a second command of the wire switching switch is sent, and the fast switching device closes the second incoming switch. And when the second incoming line switch is closed, switching is finished, and otherwise, the third incoming line power supply switching logic is judged to be closed. And if the second incoming line power supply does not have a ready condition, controlling the fast switching device to switch on the third incoming line switch.
Mode five: when the first inlet switch and the second inlet switch are in the closed position, the sectionalizing switch is in the separated position, and the device completes charging. When the first incoming line power supply fails, the fast cutting device breaks the first incoming line switch, the sectional switch is closed, if the sectional switch fails to close, the voltage of the section II bus is normal, at this time, the second incoming line power supply operates with the section II bus, and the fast cutting device keeps a ready state. If the sectional switch is refused to be closed and the voltage of the section II bus is lost, the fast switching device is controlled to be closed to the line switch III.
Mode six: when the first inlet switch and the second inlet switch are in the closed position, the sectionalizing switch is in the separated position, and the device completes charging. The loads connected with the two sections of buses are powered by the first wire inlet power supply and the second wire inlet power supply, if the first wire inlet power supply and the second wire inlet power supply simultaneously fail, the fast switching device is controlled to trip the first wire inlet switch and the second wire inlet switch, and meanwhile the fast switching device is directly connected with the third wire inlet switch.
Preferably: whether the first incoming power supply is ready refers to whether incoming voltage is recovered to be normal or not, and whether the second incoming power supply is ready refers to whether the incoming voltage is recovered to be normal or not.
Preferably: the first inlet wire power supply and the second inlet wire power supply are upper-level power transformation stations, and the third inlet wire power supply is a diesel generator.
Preferably: the simultaneous failure of the first incoming line power supply and the second incoming line power supply means that the I section bus and the II section bus are not pressed, and the line current of the first incoming line power supply and the second incoming line power supply is not flowing.
Compared with the prior art, the invention has the following beneficial effects:
1) The invention realizes the multi-mode switching of the power supply based on three incoming line power supplies, and ensures the reliable, continuous and stable power supply of the load carried by the industrial enterprise power supply; 2) According to the invention, the working condition that the I section bus or the II section bus is switched to be powered by the third incoming line power supply is considered, namely when the first incoming line power supply and the second incoming line power supply are simultaneously failed due to the failure of the upper-level substation or one of the two incoming line power supplies is failed, the other incoming line power supply is used for carrying out operation on the two sections of buses after the fast switching device is successfully switched, the working power supply is failed again and the failed incoming line power supply is still not recovered, so that the two sections of buses lose power, and the third incoming line power supply is put into operation.
Drawings
Fig. 1 is a schematic diagram of a single bus segment multiple power supply topology.
Fig. 2 is a flow chart of a method of incoming switch one-to-sectionalizer switching.
Fig. 3 is a flow chart of a method of switching the incoming switch two to the sectionalizer.
Fig. 4 is a flow chart of a method for switching the first incoming line switch and the second incoming line switch to the third incoming line switch when the first incoming line power supply and the second incoming line power supply are simultaneously failed.
Fig. 5 is a flow chart of a method of switching a sectionalizer to an incoming switch.
Fig. 6 is a flow chart of a method for switching the third incoming switch to the first incoming switch or the second incoming switch.
Detailed Description
The present invention is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the invention and not limiting of its scope, and various equivalent modifications to the invention will fall within the scope of the appended claims to the skilled person after reading the invention.
A power supply rapid switching starting control system based on multi-power supply cooperative control adopts a single bus segment wiring mode, as shown in fig. 1, and comprises a first incoming power supply (abbreviated as an incoming power supply 1) 1, a second incoming power supply (abbreviated as an incoming power supply 2) 2, a third incoming power supply (abbreviated as an incoming power supply 3) 3, an I-segment bus 4, an II-segment bus 5, a segment switch 6, a rapid switching device, a fault detection unit and a switching control unit, wherein:
the first incoming line power supply 1 is electrically connected with the I-section bus 4 through the first incoming line switch (1 DL) 11, the second incoming line power supply 2 is electrically connected with the II-section bus 5 through the second incoming line switch (2 DL) 21, the third incoming line power supply 3 is electrically connected with the I-section bus 4 through the third incoming line switch (4 DL) 31, and the I-section bus 4 is electrically connected with the II-section bus 5 through the sectionalizing switch (3 DL) 6. The outlet end of the section I bus 4 is connected with the first load 7, and the outlet end of the section II bus is connected with the second load 8.
The fast cutting device is used for detecting whether the first incoming line power supply 1, the second incoming line power supply 2 and the third incoming line power supply 3 have faults or not, and if the faults are detected, corresponding fault signals are sent to the switching control unit. And opening and closing the first inlet switch 11, the second inlet switch 21, the third inlet switch 31 and the sectionalizing switch 6 according to the control signals of the switching control unit.
The switching control unit obtains a switching control signal according to the corresponding fault signal, sends the switching control signal to the fast switching device, and realizes the switching of the circuit through the fast switching device.
The first incoming line power supply 1 can be used as a working power supply of the section I bus 4 or the section II bus 5; the incoming line power supply II 2 can be used as a working power supply of the I section bus 4 or the II section bus 5 or a standby power supply of the two sections buses; the inlet wire power supply III 3 is a power supply of a power grid or a diesel generator power supply and is used as a standby power supply of the section II bus 5 and the section I bus 4. In normal operation, the sectional switch 6 and the incoming line switch 11 are in a combined position, and the incoming line power supply 1 is provided with the I section bus 4 and the II section bus 5; or the sectional switch 6 and the incoming line switch II 21 are in the combined position, and the incoming line power supply II 2 operates with the section II bus 5 and the section I bus 4; or the sectional switch 6 is in a split position, the first incoming line switch 11 and the second incoming line switch 21 are in a combined position, the first incoming line power supply 1 is provided with the section I bus 4 and the second incoming line power supply 2 is provided with the section II bus 5 and the third incoming line power supply 3 is used as a standby power supply.
The working condition consideration that the I section bus 4 or the II section bus 5 is switched to be powered by the incoming line power supply III 3 includes that the incoming line power supply I1 and the incoming line power supply II 2 simultaneously fail due to the failure of the upper-level substation, so that the two sections of buses lose electricity; or one of the two incoming line power supplies fails, the other incoming line power supply is used for carrying out operation on the two sections of buses after the fast switching device is switched successfully, and at the moment, the working power supply fails again and the failed incoming line power supply is not recovered, so that the two sections of buses lose power.
The switching control unit comprises a first switching mode module, a second switching mode module, a third switching mode module, a fourth switching mode module, a fifth switching mode module and a sixth switching mode module, wherein:
the first switching mode module is used for completing charging when the first incoming line switch 11 and the second incoming line switch 21 are in the combined position and the sectional switch 6 is in the separated position. When the first incoming line power supply 1 fails, the fast-cutting device is controlled to trip the first incoming line switch 11 and close the sectionalized switch 6, so that the second incoming line power supply 2 runs with the first section bus 4 and the second section bus 5. If the sectional switch 6 is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
The second switching mode module is used for completing charging when the first incoming line switch 11 and the second incoming line switch 21 are in the combined position and the sectional switch 6 is in the separated position. When the second incoming line power supply 2 fails, the fast switching device is controlled to trip the second incoming line switch 21 and close the sectionalized switch 6, so that the first incoming line power supply 1 runs with the first section bus 4 and the second section bus 5. If the sectional switch 6 is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
The switching mode three module is used for completing charging when the first inlet switch 11 and the second inlet switch 21 are in the combined position and the sectional switch 6 is in the separated position. When the first incoming line power supply 1 fails, the fast-cutting device is controlled to trip the first incoming line switch 11, and after the first incoming line switch 11 is confirmed to trip and the switching conditions are met, a sectional switch command is sent to switch on and switch off, and the sectional switch 6 is switched on, so that the second incoming line power supply 2 runs with the section I bus 4 and the section II bus 5. If the main protection action of the wire inlet power supply II 2 or the situation that the wire inlet power supply II 2 is in no current and the voltage of the two bus bars is low occurs, the quick-cutting device is controlled to trip the wire inlet switch II 21, whether the wire inlet power supply I1 is ready is judged first, and if the wire inlet power supply I1 is ready, the quick-cutting device is controlled to close the wire inlet switch I11. When the first incoming line switch 11 is closed, the switching is finished, otherwise, the logic of the third incoming line switch 31 is judged to be closed. If the first incoming power supply 1 does not have the ready condition, the fast switching device is controlled to switch on the third incoming switch 31.
The switching mode four modules are used for completing charging when the first inlet switch 11 and the second inlet switch 21 are in the combined position and the sectional switch 6 is in the separated position. When the second incoming line power supply 2 fails, the fast switching device is controlled to trip the second incoming line switch 21, and after the switch is determined to trip and the switching condition is met, a sectional switch command is sent to switch on and off, and the sectional switch 6 is switched on and off, so that the first incoming line power supply 1 is enabled to operate with the first section bus 4 and the second section bus 5. If the primary protection action of the first wire inlet power supply 1 or the situation that the first wire inlet power supply 1 is free of a circuit and the voltage of two sections of buses is low occurs, a command of jumping the first wire inlet switch 11 is sent by the fast switching device, the first wire inlet switch 11 is jumped, whether the second wire inlet power supply 2 is ready is judged first, and if the second wire inlet power supply 2 is ready, a command of closing the second wire inlet switch 21 is sent, and the fast switching device closes the second wire inlet switch 21. When the second incoming line switch 21 is closed, the switching is finished, otherwise, the third incoming line power supply 3 switch logic is judged to be closed. If the second incoming power supply 2 does not have the ready condition, the fast switching device is controlled to switch on the third incoming switch 31.
The switching mode five modules are used for completing charging when the first incoming line switch 11 and the second incoming line switch 21 are in the combined position and the sectional switch 6 is in the separated position. When the first incoming line power supply 1 fails, the fast cutting device breaks the first incoming line switch 11 and closes the sectionalized switch 6, if the sectionalized switch 6 fails to close, but the voltage of the second section bus 5 is normal, at this time, the second incoming line power supply 2 runs with the second section bus 5, and the fast cutting device keeps a ready state. If the sectional switch 6 is closed refused and the voltage of the section II bus 5 is lost, the fast switching device is controlled to be closed to the line switch III 31.
The six switch mode modules are used for completing charging when the first inlet switch 11 and the second inlet switch 21 are in the combined position and the sectional switch 6 is in the separated position. The loads connected with the two sections of buses are powered by a first incoming line power supply 1 and a second incoming line power supply 2, if the first incoming line power supply 1 and the second incoming line power supply 2 simultaneously fail, the fast switching device is controlled to trip the first incoming line switch 11 and the second incoming line switch 21, and meanwhile the fast switching device is directly connected with the third incoming line switch 31.
The power supply rapid switching starting control method based on the multi-power supply cooperative control adopts the power supply rapid switching starting control system based on the multi-power supply cooperative control, and comprises the following switching modes:
mode one: when the first inlet switch 11 and the second inlet switch 21 are in the closed position and the sectionalizing switch 6 is in the separated position, the device completes charging. When the first incoming line power supply 1 fails, the fast-cutting device is controlled to trip the first incoming line switch 11 and close the sectionalized switch 6, so that the second incoming line power supply 2 runs with the first section bus 4 and the second section bus 5. If the sectional switch 6 is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
Mode two: when the first inlet switch 11 and the second inlet switch 21 are in the closed position and the sectionalizing switch 6 is in the separated position, the device completes charging. When the second incoming line power supply 2 fails, the fast switching device is controlled to trip the second incoming line switch 21 and close the sectionalized switch 6, so that the first incoming line power supply 1 runs with the first section bus 4 and the second section bus 5. If the sectional switch 6 is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met.
Mode three: when the first inlet switch 11 and the second inlet switch 21 are in the closed position and the sectionalizing switch 6 is in the separated position, the device completes charging. As shown in fig. 2, when the first incoming line power supply 1 fails, the fast-cutting device is controlled to trip the first incoming line switch 11, and after the first incoming line switch 11 is determined to trip and the closing condition is met, a sectional switch command is sent to close the sectional switch 6, so that the second incoming line power supply 2 runs with the section I bus 4 and the section II bus 5. If the main protection action (such as light difference protection) of the second incoming power supply 2 occurs or the second incoming power supply 2 is in no-current state and the voltage of the two bus bars is low, the fast switching device is controlled to switch off the second incoming switch 21, whether the first incoming power supply 1 is ready is judged first, and if the first incoming power supply 1 is ready, the fast switching device is controlled to switch on the first incoming switch 11. When the first incoming line switch 11 is closed, the switching is finished, otherwise, the logic of the third incoming line switch 31 is judged to be closed. If the first incoming power supply 1 does not have a ready condition, the fast switching device is controlled to switch on the third incoming switch 31 (if the third incoming power supply 3 is a diesel generator, the fast switching device sends a diesel generator starting command, and after the fast switching device receives a ready signal of the diesel generator, the fast switching device switches on the third incoming switch 31, and the following is the same).
Mode four: when the first inlet switch 11 and the second inlet switch 21 are in the closed position and the sectionalizing switch 6 is in the separated position, the device completes charging. As shown in fig. 3, when the second incoming line power supply 2 fails, the fast-cutting device is controlled to trip the second incoming line switch 21, and after the switch is determined to trip and the on-off condition is satisfied, a sectional switch command is issued to switch on and off the sectional switch 6, so that the first incoming line power supply 1 runs with the section I bus 4 and the section II bus 5. If the primary protection action of the first wire inlet power supply 1 or the situation that the first wire inlet power supply 1 is free of current and the voltage of the two bus bars is low occurs, the fast switching device sends a command of jumping the first wire inlet switch 11, the first wire inlet switch 11 is tripped, whether the second wire inlet power supply 2 is ready (whether the voltage of the wire inlet is recovered to be normal) is judged first, and if the second wire inlet power supply 2 is ready, a command of closing the second wire inlet switch 21 is sent, and the fast switching device closes the second wire inlet switch 21. When the second incoming line switch 21 is closed, the switching is finished, otherwise, the third incoming line power supply 3 switch logic is judged to be closed. If the second incoming power supply 2 does not have the ready condition, the fast switching device is controlled to switch on the third incoming switch 31.
Mode five: when the first inlet switch 11 and the second inlet switch 21 are in the closed position and the sectionalizing switch 6 is in the separated position, the device completes charging. When the first incoming line power supply 1 fails, the fast cutting device breaks the first incoming line switch 11 and closes the sectionalized switch 6, if the sectionalized switch 6 fails to close, but the voltage of the second section bus 5 is normal, at this time, the second incoming line power supply 2 runs with the second section bus 5, and the fast cutting device keeps a ready state. If the sectional switch 6 is closed refused and the voltage of the section II bus 5 is lost, the fast switching device is controlled to be closed to the line switch III 31.
Mode six: when the first inlet switch 11 and the second inlet switch 21 are in the closed position and the sectionalizing switch 6 is in the separated position, the device completes charging. As shown in fig. 4, the loads connected to the two sections of buses are powered by the first incoming power supply 1 and the second incoming power supply 2, and if the first incoming power supply 1 and the second incoming power supply 2 fail at the same time, it is confirmed that the section I bus 4 and the section II bus 5 are not under voltage (i.e. the bus voltage is smaller than the voltage-losing starting fixed value U) sydz ) And no line current of the incoming line power supply flows (i.e. incoming line current is smaller than no-current constant value I wldz ) After that, the fast-cutting device is controlled to trip the first wire-feeding switch 11 and the second wire-feeding switch 21, and after the first wire-feeding switch 11 and the second wire-feeding switch 21 are confirmed to trip, a sectional switch command is sent out, and at the moment, whether the sectional switch is closed or not is not needed to be confirmed, and the fast-cutting device directly closes the third wire-feeding switch 31.
As shown in fig. 5, in the case where the sectionalizer 6 is closed, the bus voltage is supplied by the first incoming power supply 1 or the second incoming power supply 2. The second inlet switch 21 and the sectionalizing switch 6 are in the combined position, the first inlet switch 11 is in the split position, the device finishes charging, and the bus voltage is provided by the second inlet power supply 2. The switching handle is manually controlled, the sectional switch 6 is switched to the first wire inlet switch 11, the command of the sectional switch 6 is sent out, and after the fact that the sectional switch 6 is disconnected and the closing condition is met is confirmed, the command of the first wire inlet switch 11 is sent out, so that switching operation is completed.
As shown in fig. 6, in the case that the bus voltage is provided by the line-incoming power supply three 3, if the maintenance of the working power supply is completed, the operation mode needs to be recovered, and the line-incoming power supply three 3 is manually selected to be the tangential line-incoming power supply one 1 or the line-incoming power supply two 2 (the quick-cutting device is switched on for selection, and a selection handle can be arranged on the screen cabinet). The first incoming line switch 11 and the second incoming line switch 21 are in separated positions, the third incoming line switch 31 is in a closed position, manual switching is started, charging is completed, the third incoming line power supply 3 is tangential to the first incoming line power supply 1 or the second incoming line power supply 2, a command for tripping the third incoming line switch 31 is sent, whether a closing condition is met is judged after the fact that the third incoming line switch 31 is disconnected is confirmed (if the incoming line power supply is a diesel generator, a command for starting an outlet of the diesel generator is released firstly by a quick-cutting device, then whether the closing condition is met is judged), and the first incoming line switch 11 or the second incoming line switch 21 is closed through synchronous judgment (1 voltage of the incoming line power supply or 2 voltages of the incoming line power supply are required to be collected).
The invention ensures that the work load is not stopped due to the failure of the upper power supply, and ensures that the load works reliably, continuously and stably.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims (9)

1. A power supply fast switching starting control system based on multi-power supply cooperative control is characterized in that: including inlet wire power one (1), inlet wire power two (2), inlet wire power three (3), I section generating line (4), II section generating line (5), sectionalizing switch (6), cut soon device, fault detection unit, switching control unit, wherein:
the first incoming line power supply (1) is electrically connected with the section I bus (4) through the first incoming line switch (11), the second incoming line power supply (2) is electrically connected with the section II bus (5) through the second incoming line switch (21), the third incoming line power supply (3) is electrically connected with the section I bus (4) through the third incoming line switch (31), and the section I bus (4) is electrically connected with the section II bus (5) through the section switch (6);
the fast cutting device is used for detecting whether the first incoming power supply (1), the second incoming power supply (2) and the third incoming power supply (3) have faults or not, and if the faults are detected, corresponding fault signals are sent to the switching control unit; the first inlet switch (11), the second inlet switch (21), the third inlet switch (31) and the sectional switch (6) are opened and closed according to the control signal of the switching control unit;
the switching control unit obtains a switching control signal according to the corresponding fault signal, sends the switching control signal to the fast switching device, and realizes the switching of the circuit through the fast switching device.
2. The multi-power cooperative control-based power supply fast switching start control system according to claim 1, wherein: the switching control unit comprises a first switching mode module, a second switching mode module, a third switching mode module, a fourth switching mode module, a fifth switching mode module and a sixth switching mode module, wherein:
the first switching mode module is used for completing charging when the first incoming line switch (11) and the second incoming line switch (21) are in the combined position and the sectional switch (6) is in the separated position; when the first incoming line power supply (1) fails, the fast switching device is controlled to trip the first incoming line switch (11) and close the sectional switch (6), so that the second incoming line power supply (2) operates with the section I bus (4) and the section II bus (5); if the sectional switch (6) is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met;
the second switching mode module is used for completing charging when the first incoming line switch (11) and the second incoming line switch (21) are in the combined position and the sectional switch (6) is in the separated position; when the second incoming line power supply (2) fails, the fast switching device is controlled to trip the second incoming line switch (21) and close the sectional switch (6), so that the first incoming line power supply (1) operates with the first section bus (4) and the second section bus (5); if the sectional switch (6) is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met;
the switching mode three module is used for completing charging when the first incoming line switch (11) and the second incoming line switch (21) are in the combined position and the sectional switch (6) is in the separated position; when the first incoming line power supply (1) fails, the fast switching device is controlled to trip the first incoming line switch (11), and after the first incoming line switch (11) is confirmed to trip and the closing condition is met, a sectional switch command is sent to close the sectional switch (6), so that the second incoming line power supply (2) operates with the section I bus (4) and the section II bus (5); if the main protection action of the wire inlet power supply II (2) or the situation that the wire inlet power supply II (2) is in no flow and the voltage of the two bus bars is low occurs, the quick-cutting device is controlled to trip the wire inlet switch II (21), whether the wire inlet power supply I (1) is ready is judged firstly, and if the wire inlet power supply I (1) is ready, the quick-cutting device is controlled to close the wire inlet switch I (11); when the first incoming line switch (11) is closed and the switching is finished, if not, the logic of the third incoming line switch (31) is judged to be closed; if the first incoming line power supply (1) does not have the ready condition, the fast switching device is controlled to be combined with the third incoming line switch (31)
The switching mode four module is used for completing charging when the first incoming line switch (11) and the second incoming line switch (21) are in the combined position and the sectional switch (6) is in the separated position; when the second incoming line power supply (2) fails, the fast switching device is controlled to trip the second incoming line switch (21), after the tripping of the switch is confirmed and the switching condition is met, a sectional switch command is sent to switch on and switch off, and the sectional switch (6) is switched on, so that the first incoming line power supply (1) operates with the first section bus (4) and the second section bus (5); if the primary protection action of the first incoming line power supply (1) or the situation that the line of the first incoming line power supply (1) is not current and the voltage of the two sections of buses is low occurs, a fast cutting device sends a command of jumping into the first incoming line switch (11), the first incoming line switch (11) is tripped, whether the second incoming line power supply (2) is ready or not is judged first, if the second incoming line power supply (2) is ready, a command of closing the second incoming line switch (21) is sent, and the fast cutting device closes the second incoming line switch (21). When the second incoming line switch (21) is closed and the switching is finished, if not, the third incoming line power supply (3) switch logic is judged to be closed; if the second incoming line power supply (2) does not have a ready condition, controlling the fast switching device to switch on the third incoming line switch (31);
the switching mode five module is used for completing charging when the first incoming line switch (11) and the second incoming line switch (21) are in the combined position and the sectional switch (6) is in the separated position; when the first incoming line power supply (1) fails, the fast-cutting device breaks the first incoming line switch (11) and closes the sectional switch (6), if the sectional switch (6) fails to close, but the voltage of the second section bus (5) is normal, at the moment, the second incoming line power supply (2) operates with the second section bus (5), and the fast-cutting device keeps a ready state; if the sectional switch (6) is refused to be closed and the voltage of the section II bus (5) is lost, the fast switching device is controlled to be closed to the line switch III (31);
the six switching mode modules are used for completing charging when the first incoming line switch (11) and the second incoming line switch (21) are in the combined position and the sectional switch (6) is in the separated position; the loads connected with the two sections of buses are powered by the first incoming line power supply (1) and the second incoming line power supply (2), if the first incoming line power supply (1) and the second incoming line power supply (2) are simultaneously failed, the fast switching device is controlled to trip the first incoming line switch (11) and the second incoming line switch (21), and meanwhile the fast switching device is directly connected with the third incoming line switch (31).
3. The multi-power cooperative control-based power supply fast switching start control system according to claim 2, wherein: whether the first incoming power supply (1) is ready to indicate that the incoming voltage is recovered to be normal or not, and whether the second incoming power supply (2) is ready to indicate that the incoming voltage is recovered to be normal or not.
4. The multi-power cooperative control-based power supply fast switching start control system according to claim 3, wherein: the first inlet wire power supply (1) and the second inlet wire power supply (2) are upper-level power transformation stations, and the third inlet wire power supply (3) is a diesel generator.
5. The multi-power cooperative control-based power supply fast switching start control system according to claim 4, wherein: the simultaneous failure of the first incoming line power supply (1) and the second incoming line power supply (2) means that the I section bus (4) and the II section bus (5) are not pressed, and the line current of the first incoming line power supply (1) and the second incoming line power supply (2) is not flowed.
6. The power supply rapid switching starting control method based on multi-power supply cooperative control is characterized in that the power supply rapid switching starting control system based on multi-power supply cooperative control as claimed in claim 1 is adopted, and comprises the following switching modes:
mode one: when the first inlet switch (11) and the second inlet switch (21) are in the combined position, the sectional switch (6) is in the separated position, and the device finishes charging; when the first incoming line power supply (1) fails, the fast switching device is controlled to trip the first incoming line switch (11) and close the sectional switch (6), so that the second incoming line power supply (2) operates with the section I bus (4) and the section II bus (5); if the sectional switch (6) is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met;
mode two: when the first inlet switch (11) and the second inlet switch (21) are in the combined position, the sectional switch (6) is in the separated position, and the device finishes charging; when the second incoming line power supply (2) fails, the fast switching device is controlled to trip the second incoming line switch (21) and close the sectional switch (6), so that the first incoming line power supply (1) operates with the first section bus (4) and the second section bus (5); if the sectional switch (6) is closed, the voltages of the two sections of buses are recovered to be normal, and the action of the quick cutting device is completed, so that the ready state is automatically met;
mode three: when the first inlet switch (11) and the second inlet switch (21) are in the combined position, the sectional switch (6) is in the separated position, and the device finishes charging; when the first incoming line power supply (1) fails, the fast switching device is controlled to trip the first incoming line switch (11), and after the first incoming line switch (11) is confirmed to trip and the closing condition is met, a sectional switch command is sent to close the sectional switch (6), so that the second incoming line power supply (2) operates with the section I bus (4) and the section II bus (5); if the main protection action of the wire inlet power supply II (2) or the situation that the wire inlet power supply II (2) is in no flow and the voltage of the two bus bars is low occurs, the quick-cutting device is controlled to trip the wire inlet switch II (21), whether the wire inlet power supply I (1) is ready is judged firstly, and if the wire inlet power supply I (1) is ready, the quick-cutting device is controlled to close the wire inlet switch I (11); when the first incoming line switch (11) is closed and the switching is finished, if not, the logic of the third incoming line switch (31) is judged to be closed; if the first wire inlet power supply (1) does not have a ready condition, controlling the fast switching device to switch on the third wire inlet switch (31);
mode four: when the first inlet switch (11) and the second inlet switch (21) are in the combined position, the sectional switch (6) is in the separated position, and the device finishes charging; when the second incoming line power supply (2) fails, the fast switching device is controlled to trip the second incoming line switch (21), after the tripping of the switch is confirmed and the switching condition is met, a sectional switch command is sent to switch on and switch off, and the sectional switch (6) is switched on, so that the first incoming line power supply (1) operates with the first section bus (4) and the second section bus (5); if the primary protection action of the first incoming line power supply (1) or the situation that the line of the first incoming line power supply (1) is not current and the voltage of the two sections of buses is low occurs, a fast cutting device sends a command of jumping into the first incoming line switch (11), the first incoming line switch (11) is tripped, whether the second incoming line power supply (2) is ready or not is judged first, if the second incoming line power supply (2) is ready, a command of closing the second incoming line switch (21) is sent, and the fast cutting device closes the second incoming line switch (21). When the second incoming line switch (21) is closed and the switching is finished, if not, the third incoming line power supply (3) switch logic is judged to be closed; if the second incoming line power supply (2) does not have a ready condition, controlling the fast switching device to switch on the third incoming line switch (31);
mode five: when the first inlet switch (11) and the second inlet switch (21) are in the combined position, the sectional switch (6) is in the separated position, and the device finishes charging; when the first incoming line power supply (1) fails, the fast-cutting device breaks the first incoming line switch (11) and closes the sectional switch (6), if the sectional switch (6) fails to close, but the voltage of the second section bus (5) is normal, at the moment, the second incoming line power supply (2) operates with the second section bus (5), and the fast-cutting device keeps a ready state; if the sectional switch (6) is refused to be closed and the voltage of the section II bus (5) is lost, the fast switching device is controlled to be closed to the line switch III (31);
mode six: when the first inlet switch (11) and the second inlet switch (21) are in the combined position, the sectional switch (6) is in the separated position, and the device finishes charging; the loads connected with the two sections of buses are powered by the first incoming line power supply (1) and the second incoming line power supply (2), if the first incoming line power supply (1) and the second incoming line power supply (2) are simultaneously failed, the fast switching device is controlled to trip the first incoming line switch (11) and the second incoming line switch (21), and meanwhile the fast switching device is directly connected with the third incoming line switch (31).
7. The method for controlling power supply fast switching start based on multi-power supply cooperative control according to claim 6, wherein the method comprises the following steps: whether the first incoming power supply (1) is ready to indicate that the incoming voltage is recovered to be normal or not, and whether the second incoming power supply (2) is ready to indicate that the incoming voltage is recovered to be normal or not.
8. The method for controlling power supply fast switching start based on multi-power supply cooperative control according to claim 7, wherein: the first inlet wire power supply (1) and the second inlet wire power supply (2) are upper-level power transformation stations, and the third inlet wire power supply (3) is a diesel generator.
9. The method for controlling power supply fast switching start based on multi-power supply cooperative control according to claim 8, wherein the method comprises the following steps: the simultaneous failure of the first incoming line power supply (1) and the second incoming line power supply (2) means that the I section bus (4) and the II section bus (5) are not pressed, and the line current of the first incoming line power supply (1) and the second incoming line power supply (2) is not flowed.
CN202311620403.1A 2023-11-29 2023-11-29 Power supply rapid switching starting control system and method based on multi-power supply cooperative control Pending CN117559629A (en)

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