CN114336947A - Automatic standby power supply switching system and method - Google Patents
Automatic standby power supply switching system and method Download PDFInfo
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- CN114336947A CN114336947A CN202210001762.8A CN202210001762A CN114336947A CN 114336947 A CN114336947 A CN 114336947A CN 202210001762 A CN202210001762 A CN 202210001762A CN 114336947 A CN114336947 A CN 114336947A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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Abstract
The invention relates to the technical field of power supply, discloses an automatic standby power supply switching system and method, aims to solve the problems of difficult wiring and false start of the conventional automatic standby power supply switching scheme, and mainly comprises the following steps: the automatic bus transfer system comprises a spare power automatic switching device, a first current sensor, a second current sensor, a first bus sensor and a second bus sensor, wherein the first current sensor is used for detecting a first current signal of a first incoming line port and sending the detected first current signal to the spare power automatic switching device; a second current sensor for detecting a second current signal at the second inlet port; the first bus sensor is used for detecting a first voltage signal on the I section bus; the second bus sensor is used for detecting second voltage on the second section of bus; and the spare power automatic switching device is used for starting the spare power automatic switching or locking the spare power automatic switching according to the first current signal, the second current signal, the first voltage signal and the second voltage signal. The invention reduces the wiring difficulty and improves the accuracy of the backup power automatic switching start.
Description
Technical Field
The invention relates to the technical field of power supply, in particular to an automatic standby power supply switching system and method.
Background
The automatic throw-in device for standby power supply is an automatic device (called standby automatic throw-in device for short) for automatically and quickly throwing in the standby power supply after the working power supply trips due to fault. The method can improve the power supply reliability, simplify the relay protection configuration, limit the short-circuit current and improve the residual voltage of the bus. The automatic spare power switching device is an important means for ensuring continuous and reliable power supply of users in the power department.
As shown in fig. 1, the implementation manner of the segment backup power automatic switching in the prior art is as follows: in normal operation, 1QF and 2QF are in closed position, and 3QF is in separated position. After the charging of the spare power automatic switching is finished, the first-section bus loses voltage, no current exists in the incoming line 1, the second-section bus has voltage, the spare power automatic switching is started, 1QF is tripped in a tripping delay mode, 3QF is delayed and closed through closing a brake after the 1QF is determined to be tripped, and power is supplied to the first-section bus through the second-section bus; the second section of bus is in voltage loss, the incoming line 2 has no current, the first section of bus has voltage, the spare power automatic switching device is started, 2QF is tripped in a tripping delay mode, after the 2QF is determined to be tripped, 3QF is switched on in a switching-on delay mode, and power supply to the second section of bus through the first section of bus is achieved.
According to the spare power automatic switching scheme, when a certain section of bus fails, the spare power automatic switching device is locked by the action of the protection device of the section of bus incoming line, but the incoming line protection device is generally arranged in a switch cabinet at the upper end of the incoming line side and is generally far away from the position of the side, and a cable cannot be arranged remotely, so that incoming line locking wiring is cancelled under most conditions, the spare power automatic switching device is started by mistake when the certain section of bus fails, the failed bus is switched into another incoming line, the protection device of another incoming line is tripped, and then the whole two sections of buses are powered off, and potential safety hazards are brought to the stable operation of a power supply system.
The bus fault has the limitation of remote wiring in the mode of locking the spare power automatic switching device through external protection action, the practical practicability is influenced, and the influence is caused on the power supply safety.
Disclosure of Invention
The invention aims to solve the problems of difficult wiring and false starting of the conventional spare power automatic switching scheme, and provides an automatic switching system and method of a spare power supply.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect, an automatic standby power switching system is provided, including: the bus comprises a first section of bus, a second section of bus, a spare power automatic switching device, a first circuit breaker, a second circuit breaker, a third circuit breaker, a first wire inlet port, a second wire inlet port, a first current sensor, a second current sensor, a first bus sensor and a second bus sensor, wherein the first section of bus is connected with the first wire inlet port through the first circuit breaker, the second section of bus is connected with the second wire inlet port through the second circuit breaker, the first section of bus is connected with the second section of bus through the third circuit breaker, the first current sensor is arranged on a circuit between the first circuit breaker and the first section of bus, the second current sensor is arranged on a circuit between the second circuit breaker and the second section of bus, the first bus sensor is arranged on the first section of bus, the second bus sensor is arranged on the second section of bus, and the first current sensor is connected with a first input port of the spare power automatic switching device, the second current sensor is connected with a second input port of the spare power automatic switching device, the first bus sensor is connected with a third input port of the spare power automatic switching device, the second bus sensor is connected with a fourth input port of the spare power automatic switching device, a first control port of the spare power automatic switching device is connected with a control port of a first circuit breaker, a second control port of the spare power automatic switching device is connected with a control port of a second circuit breaker, and a third control port of the spare power automatic switching device is connected with a control port of a third circuit breaker;
the first current sensor is used for detecting a first current signal of the first incoming line port and sending the detected first current signal to the spare power automatic switching device;
the second current sensor is used for detecting a second current signal of a second incoming line port and sending the detected second current signal to the spare power automatic switching device;
the first bus sensor is used for detecting a first voltage signal on the I-section bus and sending the detected first voltage signal to the spare power automatic switching device;
the second bus sensor is used for detecting a second voltage signal on the second section of bus and sending the detected second voltage signal to the spare power automatic switching device;
the spare power automatic switching device is used for receiving the first current signal, the second current signal, the first voltage signal and the second voltage signal and starting the spare power automatic switching or locking the spare power automatic switching according to the first current signal, the second current signal, the first voltage signal and the second voltage signal.
As further optimization, the spare power automatic switching device locks the spare power automatic switching according to the first current signal, the second current signal, the first voltage signal and the second voltage signal, and specifically includes:
and respectively judging whether the current values corresponding to the first current signal and the second current signal are greater than or equal to a preset overcurrent threshold value, and if the current values corresponding to the first current signal or the second current signal are greater than or equal to the preset overcurrent threshold value, locking the automatic switching of the backup power supply after a preset time.
As a further optimization, the method further comprises the following steps: the alarm device is connected with the spare power automatic switching device;
the spare power automatic switching device is also used for sending an alarm signal to the alarm device when the spare power automatic switching is locked;
and the alarm device is used for receiving the alarm signal and sending an alarm according to the alarm signal.
As further optimization, starting the backup power automatic switching device according to the first current signal, the second current signal, the first voltage signal and the second voltage signal, specifically comprising:
and judging whether voltage exists on the I-section bus according to the first voltage signal, if not, judging whether current exists on the first wire inlet port according to the first current signal, if not, judging whether voltage exists on the II-section bus according to the second voltage signal, and if so, starting the spare power automatic switch to supply power to the I-section bus through the II-section bus.
As further optimization, the starting backup power automatic switching supplies power to the first section of bus through the second section of bus, and specifically comprises: and the first breaker is disconnected through tripping delay, and after the first breaker is confirmed to be disconnected, the third breaker is closed through closing delay.
As further optimization, starting the backup power automatic switching device according to the first current signal, the second current signal, the first voltage signal and the second voltage signal, specifically, the method further comprises:
and judging whether voltage exists on the second section of bus according to the second voltage signal, if not, judging whether current exists on the second wire inlet port according to the second current signal, if not, judging whether voltage exists on the first section of bus according to the first voltage signal, and if so, starting the spare power automatic switch to supply power to the second section of bus through the first section of bus.
As further optimization, the starting backup power automatic switching supplies power to the second segment of bus through the first segment of bus, and specifically comprises: and the second breaker is disconnected through tripping delay, and after the second breaker is confirmed to be disconnected, the third breaker is closed through closing delay.
As a further optimization, the method further comprises the following steps: the spare power automatic switching device comprises tripping contacts and tripping confirmation contacts, the number of the tripping contacts is the same as that of the load switches, each tripping node is connected with a control port of the corresponding load switch, and each tripping confirmation contact is connected with a normally closed contact of the corresponding load switch;
the spare power automatic switching device is also used for controlling the disconnection of each load switch through a tripping contact corresponding to each load switch if the spare power automatic switching needs to be started to supply power to the second section of bus through the first section of bus when the power transmission capacity of the first incoming line port is insufficient, and starting the spare power automatic switching to supply power to the second section of bus through the first section of bus after the corresponding load switch is confirmed to be disconnected through the tripping confirmation contact.
As a further optimization, the backup power automatic switching device is further configured to, when the power transmission capacity of the second incoming line port is insufficient, if the backup power automatic switching needs to be started to supply power to the first-segment bus through the second-segment bus, control to disconnect each load switch through a trip contact corresponding to each load switch, and after the corresponding load switch is confirmed to be disconnected through the trip confirmation contact, start the backup power automatic switching to supply power to the first-segment bus through the second-segment bus.
In a second aspect, a backup power source automatic switching method is provided, and is applied to the backup power source automatic switching system, and the method includes the following steps:
and respectively judging whether the current values corresponding to the first current signal and the second current signal are greater than or equal to a preset overcurrent threshold value, and if the current values corresponding to the first current signal or the second current signal are greater than or equal to the preset overcurrent threshold value, locking the automatic switching of the backup power supply after a preset time.
The invention has the beneficial effects that: the automatic standby power supply switching system and the method can automatically start the automatic standby power supply switching according to the voltage or current of the bus and the incoming line, can judge whether the bus fault exists or not, and lock the automatic standby power supply switching if the bus fault is judged, so that the problem of false starting of the automatic standby power supply switching is effectively avoided on the premise of no need of long-distance wiring.
Drawings
FIG. 1 is a schematic structural diagram of an automatic standby power supply switching system;
fig. 2 is a schematic diagram of a locked spare power automatic switching device according to an embodiment of the present invention;
fig. 3 is a schematic wiring diagram of the backup power automatic switching device according to the embodiment of the invention;
description of reference numerals:
1 QF-first circuit breaker; 2 QF-second circuit breaker; 3 QF-third circuit breaker; 1BA — first current sensor; 2 BA-second current sensor; 1BTV — first bus bar sensor; 2 BTV-second bus sensor; 1L-a first load switch; 2L-second load switch.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides an automatic standby power supply switching system, which comprises: the bus comprises a first section of bus, a second section of bus, a spare power automatic switching device, a first circuit breaker, a second circuit breaker, a third circuit breaker, a first wire inlet port, a second wire inlet port, a first current sensor, a second current sensor, a first bus sensor and a second bus sensor, wherein the first section of bus is connected with the first wire inlet port through the first circuit breaker, the second section of bus is connected with the second wire inlet port through the second circuit breaker, the first section of bus is connected with the second section of bus through the third circuit breaker, the first current sensor is arranged on a circuit between the first circuit breaker and the first section of bus, the second current sensor is arranged on a circuit between the second circuit breaker and the second section of bus, the first bus sensor is arranged on the first section of bus, the second bus sensor is arranged on the second section of bus, and the first current sensor is connected with a first input port of the spare power automatic switching device, the second current sensor is connected with a second input port of the spare power automatic switching device, the first bus sensor is connected with a third input port of the spare power automatic switching device, the second bus sensor is connected with a fourth input port of the spare power automatic switching device, a first control port of the spare power automatic switching device is connected with a control port of a first circuit breaker, a second control port of the spare power automatic switching device is connected with a control port of a second circuit breaker, and a third control port of the spare power automatic switching device is connected with a control port of a third circuit breaker; the first current sensor is used for detecting a first current signal of the first incoming line port and sending the detected first current signal to the spare power automatic switching device; the second current sensor is used for detecting a second current signal of a second incoming line port and sending the detected second current signal to the spare power automatic switching device; the first bus sensor is used for detecting a first voltage signal on the I-section bus and sending the detected first voltage signal to the spare power automatic switching device; the second bus sensor is used for detecting a second voltage signal on the second section of bus and sending the detected second voltage signal to the spare power automatic switching device; the spare power automatic switching device is used for receiving the first current signal, the second current signal, the first voltage signal and the second voltage signal and starting the spare power automatic switching or locking the spare power automatic switching according to the first current signal, the second current signal, the first voltage signal and the second voltage signal.
Particularly, when power supply system normally works, first circuit breaker and second circuit breaker all are in the closure state, the third circuit breaker is in the off-state, when one of them section generating line broke down, this section trouble generating line is in the voltage loss state, and because probably trigger the circuit breaker that the urgent protection disconnection corresponds behind the bus fault, and then make the current sensor that corresponds can not detect the electric current, this has just reached the condition that starts the spare power automatic switching, if start the spare power automatic switching this moment, with the bus access that breaks down not have the generating line that breaks down, then can cause another protection device that returns the inlet wire to trip, and then cause whole two sections generating lines to lose electricity, the steady operation who has brought the potential safety hazard for power supply system. Based on the method, the first current signal of the first incoming line port and the second current signal of the second incoming line port are respectively acquired, whether bus faults exist is judged by judging the increase change of incoming line current and delaying, if the bus fault is judged at one section, the spare power automatic switching device is locked, otherwise, the spare power automatic switching device is started, and further the false starting of the spare power automatic switching device is avoided.
Examples
The hardware structure of the automatic standby power supply switching system according to the embodiment of the present invention is the same as that of the prior art, and as shown in fig. 1, the automatic standby power supply switching system includes: the bus comprises a first section of bus, a second section of bus, a spare power automatic switching device, a first circuit breaker 1QF, a second circuit breaker 2QF, a third circuit breaker 3QF, a first wire inlet port, a second wire inlet port, a first current sensor 1BA, a second current sensor 2BA, a first bus sensor 1BTV and a second bus sensor 2BTV, wherein the first section of bus is connected with the first wire inlet port through the first circuit breaker 1QF, the second section of bus is connected with the second wire inlet port through the second circuit breaker 2QF, the first section of bus is connected with the second section of bus through the third circuit breaker 3QF, the first current sensor 1BA is arranged on a circuit between the first circuit breaker 1QF and the first section of bus, the second current sensor 2BA is arranged on a circuit between the second circuit breaker 2QF and the second section of bus, the first bus sensor 1V is arranged on the first section of bus, and the second bus sensor 2BTV is arranged on the second section of bus, the first current sensor 1BA is connected with a first input port of a spare power automatic switching device, the second current sensor 2BA is connected with a second input port of the spare power automatic switching device, the first bus sensor 1BTV is connected with a third input port of the spare power automatic switching device, the second bus sensor 2BTV is connected with a fourth input port of the spare power automatic switching device, a first control port of the spare power automatic switching device is connected with a control port of a first circuit breaker 1QF, a second control port of the spare power automatic switching device is connected with a control port of a second circuit breaker 2QF, and a third control port of the spare power automatic switching device is connected with a control port of a third circuit breaker 3 QF;
the first current sensor 1BA is configured to detect a first current signal of the first inlet port, and send the detected first current signal to the backup automatic switching device;
the second current sensor 2BA is configured to detect a second current signal of the second inlet port, and send the detected second current signal to the backup automatic switching device;
the first bus sensor 1BTV is used for detecting a first voltage signal on the I-section bus and sending the detected first voltage signal to the spare power automatic switching device;
the second bus sensor 2BTV is used for detecting a second voltage signal on the second section of bus and sending the detected second voltage signal to the spare power automatic switching device;
the spare power automatic switching device is used for receiving the first current signal, the second current signal, the first voltage signal and the second voltage signal and starting the spare power automatic switching or locking the spare power automatic switching according to the first current signal, the second current signal, the first voltage signal and the second voltage signal.
In this embodiment, the first current sensor 1BA is connected to the backup power automatic switching device terminal ID: 1 to ID: 4, the second current sensor 2BA is connected to the backup power automatic switching device terminal ID: 6-ID: 9.
it can be understood that, when the power supply system works normally, the first circuit breaker 1QF and the second circuit breaker 2QF are both in a closed state, the third circuit breaker 3QF is in an open state, the backup power automatic switching device acquires a first current signal detected by the first current sensor 1BA, a second current signal detected by the second current sensor 2BA, a first voltage signal detected by the first bus bar sensor 1BTV and a second voltage signal detected by the second bus bar sensor 2BTV in real time, and starts backup power automatic switching or locks backup power automatic switching according to the acquired current signal and voltage signal.
Wherein, starting the spare power automatic switching specifically comprises:
whether voltage exists on the I section of bus is judged according to the first voltage signal, if not, whether current exists in the first wire inlet port is judged according to the first current signal, if not, whether voltage exists on the II section of bus is judged according to the second voltage signal, if, the spare power automatic switching is started to supply power to the I section of bus through the II section of bus, and the method specifically comprises the following steps: and the first breaker 1QF is disconnected through trip delay, and the third breaker 3QF is closed through closing delay after the first breaker 1QF is confirmed to be disconnected.
Whether voltage exists on the second section of bus is judged according to the second voltage signal, if not, whether current exists in the second wire inlet port is judged according to the second current signal, if not, whether voltage exists on the first section of bus is judged according to the first voltage signal, if, the spare power automatic switching is started to supply power to the second section of bus through the first section of bus, and the method specifically comprises the following steps: and the second breaker 2QF is disconnected through trip delay, and the third breaker 3QF is closed through closing delay after the second breaker 2QF is confirmed to be disconnected.
The locking spare power automatic switching device specifically comprises:
and respectively judging whether the current values corresponding to the first current signal and the second current signal are greater than or equal to a preset overcurrent threshold value, and if the current values corresponding to the first current signal or the second current signal are greater than or equal to the preset overcurrent threshold value, locking the automatic switching of the backup power supply after a preset time.
In order to facilitate the operator to know the fault condition, this embodiment further includes: the alarm device is connected with the spare power automatic switching device; the spare power automatic switching device is also used for sending an alarm signal to the alarm device when the spare power automatic switching is locked; and the alarm device is used for receiving the alarm signal and sending an alarm according to the alarm signal.
As shown in fig. 2, the first current and the second current are monitored in the backup power automatic switching device in real time, and when any one of the monitored currents is greater than or equal to the preset overcurrent threshold Izd, the time delay t1 sends an alarm signal and locks the backup power automatic switching device inside. Specifically, when the first current is monitored to be larger than or equal to a preset overcurrent threshold value Izd, a fault of a bus at the first section is judged, when the first current is monitored to be larger than or equal to a preset overcurrent threshold value Izd, a fault of a bus at the second section is judged, and when any bus fault is judged, a time delay t1 is carried out to send an alarm signal and the spare power automatic switching device is locked inside.
The preset overcurrent threshold Izd and the delay t1 can be set according to actual conditions, the overcurrent threshold Izd is generally set to 1.21e, and the delay t1 is generally set to the sum of the longest delay of the lower-level protection and 0.3 second.
In addition, for a power supply system which has at least one load switch and is provided with I section bus and/or II section bus which are respectively connected with a load through at least one load switch, in order to meet the power supply requirement of a main load after the backup power automatic switching device is started, in the embodiment, the backup power automatic switching device further comprises tripping contacts and tripping confirmation contacts which are the same as the load switches in number, each tripping contact is connected with the control port of the corresponding load switch, and each tripping confirmation contact is connected with the normally closed contact of the corresponding load switch.
The spare power automatic switching device is also used for controlling the disconnection of each load switch through a tripping contact corresponding to each load switch if the spare power automatic switching needs to be started to supply power to the second section of bus through the first section of bus when the power transmission capacity of the first incoming line port is insufficient, and starting the spare power automatic switching to supply power to the second section of bus through the first section of bus after the corresponding load switch is confirmed to be disconnected through the tripping confirmation contact. And when the power transmission capacity of the second incoming line port is insufficient, if the backup power automatic switching needs to be started to supply power to the I section of bus through the II section of bus, the backup power automatic switching is started to supply power to the I section of bus through the II section of bus after the corresponding load switches are controlled to be disconnected through the corresponding tripping contacts of the load switches and the corresponding load switches are confirmed to be disconnected through the tripping confirmation contacts.
In the present embodiment, the above scheme is described in detail by taking two load switches as an example, as shown in fig. 1, the first-segment bus is connected to the first load through the first load switch L1, and the second-segment bus is connected to the second load through the second load switch L2, as shown in fig. 3, the present embodiment adds two trip contacts and two trip confirmation contacts, that is, the first trip node T1 and the second trip contact T2, the first trip confirmation contact and the second trip confirmation contact, and the terminal KD in the backup power automatic switching device: 1 and KD: 2 DI connected into the first load switch L1 cabinet: 1 and DI:2 terminal, KD: 3 and KD: DI with 4 terminals connected into the second load switch L2 cabinet: 1 and DI: and a 2 terminal, wherein the terminal ZD:1 in the spare power automatic switching device is connected with the terminal DI:1 through a normally closed contact of the first load switch L1, and the terminal ZD:1 is also connected with the terminal DI:2 through a normally closed contact of the second load switch L2.
When the power transmission capacity of the first incoming line port is insufficient, if the backup power automatic switching is required to be started to supply power to the second-section bus through the first-section bus, the first load switch L1 and the second load switch L2 are controlled to be disconnected through the tripping contacts T1 and T2 corresponding to the first load switch L1 and the second load switch L2, after the first load switch L1 and the second load switch L2 are disconnected, the corresponding normally closed contacts are disconnected, the backup power automatic switching device can confirm whether the first load switch L1 and the second load switch L2 are disconnected according to the corresponding tripping confirmation contacts, and if yes, the backup power automatic switching is started to supply power to the second-section bus through the first-section bus.
Correspondingly, when the power transmission capacity of the second inlet port is insufficient, if the backup power automatic switching device needs to be started to supply power to the first-section bus through the second-section bus, the first load switch L1 and the second load switch L2 are controlled to be disconnected through the tripping contacts T1 and T2 corresponding to the first load switch L1 and the second load switch L2, after the first load switch L1 and the second load switch L2 are disconnected, the corresponding normally closed contacts are disconnected, the backup power automatic switching device can confirm whether the first load switch L1 and the second load switch L2 are disconnected according to the corresponding tripping confirmation contacts, and if yes, the backup power automatic switching device is started to supply power to the first-section bus through the second-section bus.
It can be understood that when the power transmission capacity of the inlet port without power failure is insufficient, the unimportant heavy load is cut off through the corresponding load switch, and the backup power automatic switching device is started after the cut-off is confirmed to be successful, so that the inlet port without power failure after the backup power automatic switching device is started can meet the power supply requirement of the main load, the use scene of the backup power automatic switching device is greatly widened, and particularly the scene of starting a backup diesel engine power supply is aimed at.
Based on the above technical solution, this embodiment further provides a standby power source automatic switching method, which is applied to the above standby power source automatic switching system, and the method includes the following steps:
and respectively judging whether the current values corresponding to the first current signal and the second current signal are greater than or equal to a preset overcurrent threshold value, and if the current values corresponding to the first current signal or the second current signal are greater than or equal to the preset overcurrent threshold value, locking the automatic switching of the backup power supply after a preset time.
It can be understood that, since the method for standby power source auto-switching according to the embodiment of the present invention is implemented based on the system for standby power source auto-switching according to the embodiment, the method disclosed in the embodiment is relatively simple in description since it corresponds to the system disclosed in the embodiment, and the relevant points can be referred to the partial description of the system.
Claims (10)
1. Automatic switching system of stand-by power supply, its characterized in that includes: the bus comprises a first section of bus, a second section of bus, a spare power automatic switching device, a first circuit breaker, a second circuit breaker, a third circuit breaker, a first wire inlet port, a second wire inlet port, a first current sensor, a second current sensor, a first bus sensor and a second bus sensor, wherein the first section of bus is connected with the first wire inlet port through the first circuit breaker, the second section of bus is connected with the second wire inlet port through the second circuit breaker, the first section of bus is connected with the second section of bus through the third circuit breaker, the first current sensor is arranged on a circuit between the first circuit breaker and the first section of bus, the second current sensor is arranged on a circuit between the second circuit breaker and the second section of bus, the first bus sensor is arranged on the first section of bus, the second bus sensor is arranged on the second section of bus, and the first current sensor is connected with a first input port of the spare power automatic switching device, the second current sensor is connected with a second input port of the spare power automatic switching device, the first bus sensor is connected with a third input port of the spare power automatic switching device, the second bus sensor is connected with a fourth input port of the spare power automatic switching device, a first control port of the spare power automatic switching device is connected with a control port of a first circuit breaker, a second control port of the spare power automatic switching device is connected with a control port of a second circuit breaker, and a third control port of the spare power automatic switching device is connected with a control port of a third circuit breaker;
the first current sensor is used for detecting a first current signal of the first incoming line port and sending the detected first current signal to the spare power automatic switching device;
the second current sensor is used for detecting a second current signal of a second incoming line port and sending the detected second current signal to the spare power automatic switching device;
the first bus sensor is used for detecting a first voltage signal on the I-section bus and sending the detected first voltage signal to the spare power automatic switching device;
the second bus sensor is used for detecting a second voltage signal on the second section of bus and sending the detected second voltage signal to the spare power automatic switching device;
the spare power automatic switching device is used for receiving the first current signal, the second current signal, the first voltage signal and the second voltage signal and starting the spare power automatic switching or locking the spare power automatic switching according to the first current signal, the second current signal, the first voltage signal and the second voltage signal.
2. The automatic standby power switching system according to claim 1, wherein the backup power automatic switching device locks the backup power automatic switching device according to the first current signal, the second current signal, the first voltage signal, and the second voltage signal, and specifically comprises:
and respectively judging whether the current values corresponding to the first current signal and the second current signal are greater than or equal to a preset overcurrent threshold value, and if the current values corresponding to the first current signal or the second current signal are greater than or equal to the preset overcurrent threshold value, locking the automatic switching of the backup power supply after a preset time.
3. The backup power automatic switching system according to claim 2, further comprising: the alarm device is connected with the spare power automatic switching device;
the spare power automatic switching device is also used for sending an alarm signal to the alarm device when the spare power automatic switching is locked;
and the alarm device is used for receiving the alarm signal and sending an alarm according to the alarm signal.
4. The automatic standby power switching system according to claim 1, wherein the starting of the automatic standby power switching according to the first current signal, the second current signal, the first voltage signal, and the second voltage signal specifically includes:
and judging whether voltage exists on the I-section bus according to the first voltage signal, if not, judging whether current exists on the first wire inlet port according to the first current signal, if not, judging whether voltage exists on the II-section bus according to the second voltage signal, and if so, starting the spare power automatic switch to supply power to the I-section bus through the II-section bus.
5. The automatic standby power switching system according to claim 4, wherein the starting of the automatic standby power switching system supplies power to the first-segment bus through the second-segment bus, and specifically comprises: and the first breaker is disconnected through tripping delay, and after the first breaker is confirmed to be disconnected, the third breaker is closed through closing delay.
6. The automatic standby power switching system according to claim 1, wherein the automatic standby power switching is started according to the first current signal, the second current signal, the first voltage signal, and the second voltage signal, and further comprising:
and judging whether voltage exists on the second section of bus according to the second voltage signal, if not, judging whether current exists on the second wire inlet port according to the second current signal, if not, judging whether voltage exists on the first section of bus according to the first voltage signal, and if so, starting the spare power automatic switch to supply power to the second section of bus through the first section of bus.
7. The automatic standby power switching system according to claim 6, wherein the starting of the automatic standby power switching system supplies power to the second bus through the first bus, and specifically comprises: and the second breaker is disconnected through tripping delay, and after the second breaker is confirmed to be disconnected, the third breaker is closed through closing delay.
8. The automatic standby power supply switching system according to any one of claims 1 to 7, further comprising: the spare power automatic switching device comprises tripping contacts and tripping confirmation contacts, the number of the tripping contacts is the same as that of the load switches, each tripping node is connected with a control port of the corresponding load switch, and each tripping confirmation contact is connected with a normally closed contact of the corresponding load switch;
the spare power automatic switching device is also used for controlling the disconnection of each load switch through a tripping contact corresponding to each load switch if the spare power automatic switching needs to be started to supply power to the second section of bus through the first section of bus when the power transmission capacity of the first incoming line port is insufficient, and starting the spare power automatic switching to supply power to the second section of bus through the first section of bus after the corresponding load switch is confirmed to be disconnected through the tripping confirmation contact.
9. The automatic standby power switching system as claimed in claim 8, wherein the backup power automatic switching device is further configured to, when the power transmission capacity of the second incoming line port is insufficient, if it is necessary to start the backup power automatic switching device to supply power to the first-stage bus via the second-stage bus, control to turn off each load switch via a trip contact corresponding to each load switch, and after confirming that the corresponding load switch is turned off via the trip confirmation contact, start the backup power automatic switching device to supply power to the first-stage bus via the second-stage bus.
10. The backup power source automatic switching method is applied to the backup power source automatic switching system according to claim 1, and comprises the following steps:
and respectively judging whether the current values corresponding to the first current signal and the second current signal are greater than or equal to a preset overcurrent threshold value, and if the current values corresponding to the first current signal or the second current signal are greater than or equal to the preset overcurrent threshold value, locking the automatic switching of the backup power supply after a preset time.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790426A (en) * | 2012-06-29 | 2012-11-21 | 宝钢不锈钢有限公司 | Improved spare power source automatic switch method for single bus sectionalized operation of power substation |
| CN203491774U (en) * | 2013-09-18 | 2014-03-19 | 重庆嘉瑞电气科技有限公司 | Double power supply backup automatic switching apparatus |
| CN104539043A (en) * | 2015-01-22 | 2015-04-22 | 江苏省电力公司扬州供电公司 | Automatic-switching device system and method of standby power source |
| CN106169740A (en) * | 2016-08-29 | 2016-11-30 | 国网江苏省电力公司镇江供电公司 | 110kV single-trunk segmental wiring incoming relay-protection locking prepared auto restart relay protecting method |
| CN108051706A (en) * | 2017-12-28 | 2018-05-18 | 长园深瑞继保自动化有限公司 | Automatic throw-in equipment of emergency power supply fault recognition method and system |
| CN110912253A (en) * | 2019-11-25 | 2020-03-24 | 广东电网有限责任公司 | Low-voltage intelligent spare power automatic switching system |
| CN110932395A (en) * | 2019-11-25 | 2020-03-27 | 广东电网有限责任公司 | Low-voltage intelligent spare power automatic switching communication system |
| CN113852184A (en) * | 2021-09-08 | 2021-12-28 | 国网天津市电力公司 | A device and method for self-switching of an anti-misoperation standby power supply |
-
2022
- 2022-01-04 CN CN202210001762.8A patent/CN114336947A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790426A (en) * | 2012-06-29 | 2012-11-21 | 宝钢不锈钢有限公司 | Improved spare power source automatic switch method for single bus sectionalized operation of power substation |
| CN203491774U (en) * | 2013-09-18 | 2014-03-19 | 重庆嘉瑞电气科技有限公司 | Double power supply backup automatic switching apparatus |
| CN104539043A (en) * | 2015-01-22 | 2015-04-22 | 江苏省电力公司扬州供电公司 | Automatic-switching device system and method of standby power source |
| CN106169740A (en) * | 2016-08-29 | 2016-11-30 | 国网江苏省电力公司镇江供电公司 | 110kV single-trunk segmental wiring incoming relay-protection locking prepared auto restart relay protecting method |
| CN108051706A (en) * | 2017-12-28 | 2018-05-18 | 长园深瑞继保自动化有限公司 | Automatic throw-in equipment of emergency power supply fault recognition method and system |
| CN110912253A (en) * | 2019-11-25 | 2020-03-24 | 广东电网有限责任公司 | Low-voltage intelligent spare power automatic switching system |
| CN110932395A (en) * | 2019-11-25 | 2020-03-27 | 广东电网有限责任公司 | Low-voltage intelligent spare power automatic switching communication system |
| CN113852184A (en) * | 2021-09-08 | 2021-12-28 | 国网天津市电力公司 | A device and method for self-switching of an anti-misoperation standby power supply |
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