CN214314711U - Backup power automatic switching dual-machine linkage system - Google Patents
Backup power automatic switching dual-machine linkage system Download PDFInfo
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- CN214314711U CN214314711U CN202121960878.1U CN202121960878U CN214314711U CN 214314711 U CN214314711 U CN 214314711U CN 202121960878 U CN202121960878 U CN 202121960878U CN 214314711 U CN214314711 U CN 214314711U
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Abstract
The utility model provides a two machine linked systems of spare power automatic switching. The system application place is provided with a first power supply, a second power supply and a third power supply, and the system comprises a switch module, a spare power automatic switching module and a monitoring module; the switch module comprises a first switch, a second switch and a third switch which are respectively arranged on a first power inlet wire, a second power inlet wire and a third power inlet wire; the spare power automatic switching module comprises a first spare power automatic switching device and a second spare power automatic switching device; the first spare power automatic switching device is electrically connected with the first switch and the third switch respectively; the second spare power automatic switching device is respectively electrically connected with the second switch and the third switch; the monitoring module comprises a first voltage transformer, a second voltage transformer and a third voltage transformer which can monitor the incoming line voltages of the first power supply, the second power supply and the third power supply respectively; the first voltage transformer and the second voltage transformer are also electrically connected with the first spare power automatic switching device and the second spare power automatic switching device respectively, and the third voltage transformer is electrically connected with the first spare power automatic switching device and the second spare power automatic switching device respectively. The utility model can reduce the labor intensity of the operation and maintenance personnel; the power utilization interruption time can be shortened from a minute level to a second level, so that the equipment is safer and more reliable to operate.
Description
Technical Field
The utility model relates to a field is adjusted in power consumption control, specifically relates to a two machine linked systems are hauled oneself willingly into fully.
Background
The power supply system in each place is an important arrangement for ensuring the normal operation of the equipment. As a key device for guaranteeing the reliability of a power supply system, an automatic standby power supply switching device (hereinafter referred to as a standby automatic switching device) can rapidly cut off and switch in a standby power supply when a system bus fails, and the power supply can be reliably supplied uninterruptedly.
Power plants are an important source of electrical energy. In a power plant, if power utilization is interrupted due to a fault of a power supply system, a fault shutdown is caused if the power utilization is interrupted, and a power plant is disconnected due to the fault if the power utilization is interrupted, so that a serious accident is caused. Therefore, the service power system generally adopts a multi-power-supply wiring mode to ensure the power supply reliability; however, most of the power switching operations of power plants are performed manually, which causes the problems of low working efficiency, long interruption time, high operation safety risk, etc.
SUMMERY OF THE UTILITY MODEL
To the not enough that exist among the prior art, the utility model aims to solve one or more problems that exist among the above-mentioned prior art. For example, one of the objects of the present invention is to reduce the labor intensity of operation and maintenance personnel, and the other object is to improve the stability and reliability of the power supply system.
In order to realize the aim, the utility model provides a two-machine linkage system is hauled oneself willingly into fully.
The place where the automatic standby power switching double-machine linkage system is applied is provided with a first power supply, a second power supply and a third power supply. The system can comprise a switch module, a spare power automatic switching module and a monitoring module; wherein the switch module may include a first switch, a second switch, and a third switch; the first switch is arranged on the first power supply incoming line, the second switch is arranged on the second power supply incoming line, and the third switch is arranged on the third power supply incoming line; the spare power automatic switching module comprises a first spare power automatic switching device and a second spare power automatic switching device; the first spare power automatic switching device is respectively electrically connected with the first switch and the third switch and is configured to control the two switches; the second spare power automatic switching device is respectively electrically connected with the second switch and the third switch and is configured to control the two switches; the monitoring module comprises a first voltage transformer, a second voltage transformer and a third voltage transformer; the first voltage transformer is respectively and electrically connected with a first power supply inlet wire and the first spare power automatic switching device, the second voltage transformer is respectively and electrically connected with a second power supply inlet wire and the second spare power automatic switching device, and the third voltage transformer is respectively and electrically connected with a third power supply inlet wire, the first spare power automatic switching device and the second spare power automatic switching device.
Furthermore, the outlet loop of the second switch is connected in series with the auxiliary switch contact of the first switch.
The switch module can further comprise a fourth switch and a fifth switch, wherein the fourth switch and the fifth switch are arranged on the bus and divide the bus into a first bus section, a third bus section and a second bus section in sequence; the first spare power automatic switching device is also electrically connected with the fourth switch and is configured to control the fourth switch; the second spare power automatic switching device is also electrically connected with the fifth switch and is configured to control the fifth switch.
Further, the first, second, third, fourth, and fifth switches may be circuit breakers.
Furthermore, the outlet loop of the fourth switch is connected in series with the auxiliary switch contact of the fifth switch.
Further, the time delay of the control switch of the second spare power automatic switching device is greater than the time delay of the control switch of the first spare power automatic switching device. And furthermore, the time delay of the second spare power automatic switching device for controlling the switch to be switched on is greater than the time delay of the first spare power automatic switching device for controlling the switch to be switched on.
Furthermore, the time delay of the second automatic backup power switching device control switch for switching on can be 3-20 seconds longer than the time delay of the first automatic backup power switching device control switch for switching on.
Furthermore, the time delay of the second automatic backup power switching device and the backup power supply can be longer than the time delay of the first automatic backup power switching device and the backup power supply by 3-20 seconds, such as 4 seconds, 5 seconds, 7 seconds, 9 seconds, and the like.
Furthermore, the time delay of the switching-on of the control switch of the first automatic backup power switching device can be 1-5 seconds, and the time delay of the switching-on of the control switch of the second automatic backup power switching device can be 7-15 seconds.
Furthermore, the time delay of the first automatic backup power switching device in combination with the backup power supply can be 1-5 seconds, such as 2, 3, 4 seconds and the like; the time delay of the second automatic backup power switching device and the backup power supply can be 7-15 seconds, such as 8 seconds, 10 seconds, 12 seconds, 14 seconds and the like.
Further, the monitoring module may further include a fourth voltage transformer, a fifth voltage transformer and a sixth voltage transformer, wherein the fourth voltage transformer is electrically connected to the first busbar section and the first backup power automatic switching device, respectively; the fifth voltage transformer is respectively and electrically connected with the second bus section and the second spare power automatic switching device; and the sixth voltage transformer is respectively and electrically connected with the three bus sections, the first spare power automatic switching device and the second spare power automatic switching device.
Further, the monitoring module may further include a first current transformer, a second current transformer, and a third current transformer, where the first current transformer is disposed on the first power inlet line and electrically connected to the first backup automatic switching device, or the first current transformer is electrically connected to the first power inlet line and the first backup automatic switching device, respectively; the second current transformer is arranged on the second power supply inlet wire and is electrically connected with the second spare power automatic switching device, or the second current transformer is respectively electrically connected with the second power supply inlet wire and the second spare power automatic switching device; and the third current transformer is arranged on a third power supply inlet wire and is respectively and electrically connected with the first spare power automatic switching device and the second spare power automatic switching device.
Further, both the first power source and the second power source may be generators.
Furthermore, the first power inlet wire is a first generator power inlet wire, and the second power supply is a second generator power inlet wire.
Furthermore, the distribution voltage of the third power supply is 10-66 kV power supplies, such as 10, 20, 35, 66kV and the like.
Further, the third power supply inlet wire is a 10-66 kV power supply inlet wire.
Further, the system application site is a power plant.
Compared with the prior art, the beneficial effects of the utility model can include following at least one item:
(1) the automatic switching device is time-saving, labor-saving and safe, can change manual operation into automatic switching of the spare power automatic switching device, and reduces the labor intensity of operation and maintenance personnel;
(2) the power utilization interruption time of a place (such as a power plant) can be shortened from 'minute level' to 'second level', the power utilization interruption time of the place is shortened, and the equipment is safer and more reliable to operate;
(3) the automation degree of the equipment can be improved, and the power station is beneficial to realizing unattended operation and unattended operation of a few persons;
(4) the method can be popularized and applied in the similar wiring places (such as power plants), and has strong popularization and low transformation cost;
(5) can save the production cost and obviously improve the benefit.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a schematic diagram of the dual-backup automatic switching unit linkage system of the present invention.
Description of the main reference numerals:
1-a first spare power automatic switching device, 2-a second spare power automatic switching device, 31-a first switch, 32-a second switch, 33-a third switch, 34-a fourth switch, 35-a fifth switch, 41-a first generator power inlet wire, 42-a second generator power inlet wire, 43-a third power inlet wire, 51-I bus, 52-II bus and 53-III bus; PT 1-a first voltage transformer, PT 2-a second voltage transformer, PT 3-a third voltage transformer, PT 4-a fourth voltage transformer, PT 5-a fifth voltage transformer, and PT 6-a sixth voltage transformer; CT 1-first current transformer, CT 2-second current transformer, CT 3-third current transformer.
Detailed Description
Hereinafter, the backup power automatic switching dual-machine linkage system according to the present invention will be described in detail with reference to the accompanying drawings and the exemplary embodiments.
It should be noted that "first", "second", "third", "fourth", "fifth", etc. are merely for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance. "upper," "lower," "inner," "outer," "front," "rear," and the like are merely for convenience in describing and establishing relative orientations or positional relationships, and do not indicate or imply that the referenced components must have that particular orientation or position.
Exemplary embodiment 1
The application place of the automatic standby power switching double-machine linkage system is a power plant and is provided with a first power supply, a second power supply and a third power supply. The first power supply is a first generator, and the second power supply is a second generator. The automatic standby power switching double-machine linkage system adopts the combined configuration of two sets of automatic standby power switching devices and has the functions of incoming standby power switching and sectional standby power switching.
As shown in fig. 1, the system may include a first switch 31, a second switch 32, a third switch 33, a fourth switch 34, a fifth switch 35, a first backup power automatic switching device 1, a second backup power automatic switching device 2, a first potential transformer PT1, a second potential transformer PT2, and a third potential transformer PT 3.
The first switch 31 is arranged on the first generator power inlet line 41.
The second switch 32 is arranged on the second generator power inlet line 42.
The third switch 33 is provided on the third power supply inlet line 43.
The fourth switch 34 and the fifth switch 35 are provided on the bus bar, and divide the bus bar into a first bus bar (corresponding to a first bus bar segment) 51, a second bus bar (corresponding to a second bus bar segment) 52, and a third bus bar (corresponding to a third bus bar segment) 53.
The first automatic backup power switching device 1 is electrically connected to the first switch 31, the third switch 33, and the fourth switch 34, respectively, and can monitor and control the on/off of these three switches.
The second automatic backup power switching device 2 is electrically connected to the second switch 32, the third switch 33, and the fifth switch 35, respectively, and is configured to be able to monitor and control the on/off of these three switches. The third switch 33 is used as a common control object, and the first backup automatic switching device 1 and the second backup automatic switching device 2 are independent from each other and are in communication with each other. The monitoring and controlling of the switch are the conventional functions of the spare power automatic switching device.
The first voltage transformer PT1 is electrically connected to the first generator power supply inlet 41 and the first backup power automatic switching device 1, and is capable of measuring the voltage of the first generator power supply inlet 41 and converting the measured voltage into a secondary low voltage to be used as a logic criterion of the first backup power automatic switching device 1.
The second voltage transformer PT2 is electrically connected to the second generator power supply inlet line 42 and the second backup power automatic switching device 2, and is capable of measuring the voltage of the second generator power supply inlet line 42 and converting the measured voltage into a secondary low voltage to be used as a logic criterion of the second backup power automatic switching device 2.
The third voltage transformer PT3 is electrically connected to the third power supply inlet line 43, the first backup power automatic switching device 1, and the second backup power automatic switching device 2, respectively, and is capable of measuring the voltage of the third power supply inlet line 43 and converting the measured voltage into a secondary low voltage to be used as a logic criterion for the first backup power automatic switching device 1 and the second backup power automatic switching device 2.
In this embodiment, the third power inlet wire may be a 10-66 kV power inlet wire. Namely, the distribution voltage of the third power supply is 10-66 kV.
In this embodiment, the bus may be a 0.4kV bus, i.e., a bus with a distribution voltage of 0.4 kV.
In this embodiment, the first, second, third, fourth and fifth switches may be circuit breakers.
In this embodiment, as shown in fig. 1, the second switch 32 is connected in series with the first switch 31, that is, an outlet loop of the second switch 32 is connected in series with an auxiliary switch contact of the first switch 31, that is, two sets of closing loops of the automatic backup power switching device are electrically interlocked.
In this embodiment, as shown in fig. 1, the fourth switch 34 is connected in series with the fifth switch 35, that is, the outlet loop of the fourth switch 34 is connected in series with the auxiliary switch contact of the fifth switch 35, that is, the closing loops of the two automatic backup power switching devices are electrically interlocked.
In this embodiment, the delay of the second backup power automatic switching device in combination with the backup power supply is greater than the delay of the first backup power automatic switching device in combination with the backup power supply. The time delay of the first automatic backup power switching device and the backup power supply can be 1-5 seconds, such as 2, 3, 4 seconds and the like; the time delay of the second automatic backup power switching device and the backup power supply can be 7-15 seconds, such as 8, 9, 10, 12, 14 seconds and the like.
The "delay time for combining the standby power supply" is the conventional function of the automatic standby power switching device. The method can form time difference matching by adjusting the protection fixed value and the mode of 'combining standby power supply time delay' on two spare power automatic switching devices.
Furthermore, the model of the spare power automatic switching device can be PCS-9651.
In this embodiment, the first backup power automatic switching device may determine whether the first generator power inlet line has a fault through the first voltage transformer.
The second backup power automatic switching device can judge whether the power inlet wire of the second generator fails through the second voltage transformer.
The first spare power automatic switching device and the second spare power automatic switching device can judge whether the third power inlet wire fails through the third voltage transformer.
In this embodiment, as shown in fig. 1, the system may further include a fourth potential transformer PT4, a fifth potential transformer PT5, and a sixth potential transformer PT 6.
The fourth voltage transformer PT4 is electrically connected to the i bus 51 and the first backup power automatic switching device 1, and is capable of measuring the voltage of the i bus 51 and converting the measured voltage into a secondary low voltage to be used as a logic criterion of the first backup power automatic switching device 1.
The fifth voltage transformer PT5 is electrically connected to the ii bus 52 and the second backup power automatic switching device 2, respectively, and is capable of measuring the voltage of the ii bus 52 and converting the measured voltage into a secondary low voltage to be used as a logic criterion of the second backup power automatic switching device 2.
The sixth voltage transformer PT6 is electrically connected to the iii bus 53, the first backup power automatic switching device 1, and the second backup power automatic switching device 2, respectively, and is capable of measuring the voltage of the iii bus 53 and converting the measured voltage into a secondary low voltage to be used as a logic criterion for the first backup power automatic switching device 1 and the second backup power automatic switching device 2.
In this embodiment, the first backup power automatic switching device may determine whether the i bus has a fault, for example, no voltage, through the fourth voltage transformer.
The second automatic backup power switching device can judge whether the II bus has a fault through the fifth voltage transformer, for example, no voltage is applied.
The first spare power automatic switching device and the second spare power automatic switching device can judge whether the III bus has a fault through the sixth voltage transformer, for example, no voltage is applied.
In the present embodiment, as shown in fig. 1, the system may further include a first current transformer CT1, a second current transformer CT2, and a third current transformer CT 3.
The first current transformer CT1 is capable of measuring the current of the first generator power inlet 41 and converting the measured current into a secondary low current to be used as a logic criterion of the first backup power automatic switching device 1. The first current transformer CT1 may be disposed on the first generator power inlet 41 and electrically connected to the first automatic power switching device 1. Alternatively, the first current transformer CT1 is electrically connected to the first generator power inlet 41 and the first automatic power switching device 1, respectively.
The second current transformer CT2 is capable of measuring the current of the second generator power supply incoming line 42 and converting the measured current into a secondary low current to be used as a logic criterion for the second backup power automatic switching device 2. A second current transformer CT2 may be disposed on the second generator power inlet line 42 and electrically connected to the second backup power automatic switching device 2. Alternatively, the second current transformer CT2 is electrically connected to the second generator power inlet wire 42 and the second automatic power switching device 2, respectively.
The third current transformer CT3 is capable of measuring the current of the third power supply incoming line 43 and converting the measured current into a secondary low current to be used as a logic criterion for the first backup automatic switching device 1 and the second backup automatic switching device 2. A third current transformer CT3 may be disposed on the third power inlet 43 and electrically connected to the first and second backup automatic switching devices, respectively.
In this embodiment, the first backup power automatic switching device may further determine whether the incoming line of the power supply of the first generator fails through the first current transformer.
The second backup power automatic switching device can also judge whether the power inlet wire of the second generator fails through the second current transformer.
The first spare power automatic switching device and the second spare power automatic switching device can also judge whether a third power inlet line has a fault through a third current transformer.
The exemplary embodiment will describe a first operation mode of the backup power automatic switching double-machine linkage system with reference to fig. 1, where the operation mode is an incoming backup power automatic switching mode.
The station power system is mainly supplied by a third power supply inlet wire 43, and the third power supply inlet wire is a 35kV power supply inlet wire; the first generator power inlet wire 41 and the second generator power inlet wire 42 are supplied with backup power, and the first backup power automatic switching device 1 and the second backup power automatic switching device 2 are charged. And setting and matching the starting time limit of the first spare power automatic switching device 1 and the second spare power automatic switching device 2, wherein the time delay of the first spare power automatic switching device and the second spare power automatic switching device and the time delay of the spare power supply are respectively 3 seconds and 10 seconds.
Before the fault occurs, whether the initial state of each switch is: the first switch 31 and the second switch 32 are off, the third switch 33 is on, and the fourth switch 34 and the fifth switch 35 are on.
When the main power supply inlet wire 31 loses power due to a fault, the first bus 51, the second bus 52 and the third bus 53 have no voltage, and the first spare power automatic switching device 1 and the second spare power automatic switching device 2 start to trip the third switch 33 at the same time. The first spare power automatic switching device 1 closes the first switch 31 after the 'closing of the spare power supply delay' of the device for 3 seconds, the pressure of the I bus 51, the II bus 52 and the III bus 53 is restored, and the spare power automatic switching device 1 is successfully switched.
Because the 'standby power supply switching delay' of the second automatic backup power switching device 2 is 10 seconds, which is 7 seconds longer than the time limit of the first automatic backup power switching device, and because the voltage of the second bus 52 and the third bus 53 is restored at the moment, the switching pulse of the second automatic backup power switching device 2 and the second switch 32 cannot be switched out, and the device is in a charging preparation state.
If the spare power switching of the first spare power automatic switching device 1 is unsuccessful, the non-voltage criterion of the second spare power automatic switching device 2 is met (the voltage of the bus is collected by a fifth voltage transformer PT5 and is transmitted to the spare power automatic switching device for logic judgment), a closing pulse is sent out after 10 seconds of delay to close the second switch 32, and the I, II and III buses recover voltage. If the first switch 31 is still at the switching-on position when the second automatic backup power switching device 2 sends a switching-on pulse, the second automatic backup power switching device 2 immediately discharges electricity when the discharging condition is satisfied because the switching auxiliary switch contact of the first switch 31 is connected in series in the outlet loop of the second switch 32 of the second automatic backup power switching device 2 to be switched on and switched off.
Exemplary embodiment 3
The second operation mode of the automatic backup power switching dual-machine linkage system will be described in this exemplary embodiment with reference to fig. 1, and this operation mode is another incoming-line standby power switching mode.
The auxiliary power system is mainly supplied by a first generator power inlet wire 41, a third power inlet wire 43 and a second generator power inlet wire 42 are supplied for standby, and the third power inlet wire 43 is a 35kV power inlet wire; the first backup power automatic switching device 1 is charged, and the second backup power automatic switching device 2 is not charged. And setting and matching the starting time limit of the first spare power automatic switching device 1 and the second spare power automatic switching device 2, wherein the time delay of the first spare power automatic switching device and the second spare power automatic switching device and the time delay of the spare power supply are respectively 3 seconds and 10 seconds.
Before the fault occurs, whether the initial state of each switch is: the first switch 31 is turned on, the second switch 32 and the third switch 33 are turned off, and the fourth switch 34 and the fifth switch 35 are turned on.
When the first generator power supply inlet wire 41 loses power due to faults, buses I, II and III are not pressed (the spare power automatic switching device can be judged by a fourth voltage transformer PT4, a fifth voltage transformer PT5 and a sixth voltage transformer PT 6), the first spare power automatic switching device 1 starts to trip on the first switch 31, the third switch 33 is switched on for 3 seconds by the 'switching on of a spare power supply and delaying' of the first spare power automatic switching device, the buses I, II and III are restored to be pressed, and the BZT1 is successfully switched on.
Exemplary embodiment 4
The third operation mode of the automatic backup power switching dual-machine linkage system will be described in the exemplary embodiment with reference to fig. 1, and the operation mode is another incoming-line standby power switching mode.
The station power system is mainly supplied by a second generator power inlet wire 42, a third power inlet wire 43 and a first generator power inlet wire 41 are supplied, and the third power inlet wire 43 is a 35kV power inlet wire; the second automatic backup power switching device 2 is charged, and the first automatic backup power switching device 1 is not charged. And setting and matching the starting time limit of the first spare power automatic switching device 1 and the second spare power automatic switching device 2, wherein the time delay of the first spare power automatic switching device and the second spare power automatic switching device and the time delay of the spare power supply are respectively 3 seconds and 10 seconds.
Before the fault occurs, whether the initial state of each switch is: the first switch 31 is off, the second switch 32 is on, the third switch 33 is off, and the fourth switch 34 and the fifth switch 35 are on.
When the incoming line of the second generator power supply fails, the buses I, II and III are not in voltage, the second backup automatic switching device 2 starts to trip the second switch 32, the third switch 33 is switched on for 10 seconds by the second backup automatic switching device 'switching on the backup power supply for delaying', the buses I, II and III recover to be in voltage, and the second backup automatic switching device 2 is in backup switching successfully.
Exemplary embodiment 5
The fourth operation mode of the automatic backup power switching dual-machine linkage system, which is a sectional backup power switching mode, will be described in this exemplary embodiment with reference to fig. 1.
The station service system is independently powered by a first generator power inlet wire 41, a second generator power inlet wire 42 and a third power inlet wire 43 in a segmented manner, and the third power inlet wire 43 is a 35kV power inlet wire; the first spare power automatic switching device and the second spare power automatic switching device are charged. And setting and matching the starting time limit of the first spare power automatic switching device 1 and the second spare power automatic switching device 2, wherein the time delay of the first spare power automatic switching device and the second spare power automatic switching device and the time delay of the spare power supply are respectively 3 seconds and 10 seconds.
Before the fault occurs, whether the initial state of each switch is: the first switch 31, the second switch 32, and the third switch 33 are all turned on, and the fourth switch 34 and the fifth switch 35 are turned off.
When the 35kV power inlet line fails, the third bus is powered off, the first spare power automatic switching device 1 and the second spare power automatic switching device 2 start to trip the third switch 33 at the same time, the first spare power automatic switching device 1 is switched on the fourth switch 34 after the 'switching subsection time delay' of the device for 3 seconds, the I, II and III buses recover to be pressed, and the first spare power automatic switching device 1 is successfully switched on.
Because the 'on-off section delay' of the second automatic backup power switching device 2 is 10 seconds, which is 7 seconds longer than the time limit of the first automatic backup power switching device 1, and because the voltage of the bus III is restored at the moment, the closing pulse of the second automatic backup power switching device 2 and the fifth switch 35 cannot be switched out, and the second automatic backup power switching device is in a charging preparation state.
If the spare power switching of the first spare power automatic switching device 1 is unsuccessful, the second spare power automatic switching device 2 sends a closing pulse to close the fifth switch 35 after 10 seconds of delay, the voltage of the III bus is restored, and the spare power automatic switching device 2 is successful in spare power switching. If the fourth switch 34 is still at the switching-on position after the second backup automatic switching device 2 sends a switching-on pulse for switching on the fifth switch 35, the second backup automatic switching device 2 immediately discharges when the discharge condition is satisfied because the outlet loop of the second backup automatic switching device 2 for switching on the fifth switch 35 is connected in series with the auxiliary switch contact of the fourth switch 34 to switch on and off.
Secondly, when the first generator power inlet wire 31 loses power due to a fault, the I bus is not pressed, the first spare power automatic switching device 1 starts to trip off the first switch 31, the first spare power automatic switching device 1 switches on the fourth switch 34 after the 'switching and sectioning delay' of the device for 3 seconds, the I bus is restored to be pressed, the first spare power automatic switching device 1 is successfully switched, and the second spare power automatic switching device 2 does not act.
And thirdly, when the second generator power supply inlet wire 42 loses power due to faults, the II bus is not pressurized, the second automatic bus switching device 2 starts to trip the second switch 32, the fifth switch 35 is switched on for 10 seconds after the switching-on and segmentation delay of the device, the II bus is recovered to be pressurized, the second automatic bus switching device 2 is successfully switched on, and the first automatic bus switching device 1 does not act.
To sum up, the utility model has the following characteristics:
the utility model discloses a first spare power automatic switching device and second spare power automatic switching device duplex combination configuration mode possess the inlet wire and throw fully the function with the segmentation.
And (II) monitoring and controlling the first switch, the third switch and the fourth switch by the first spare power automatic switching device. The second spare power automatic switching device monitors and controls the second switch, the third switch and the fifth switch. The third switch is used as a common control object, and the two sets of spare power automatic switching devices are independent and are mutually connected.
(III) the utility model discloses an adjustment first spare power automatic switching device and second spare power automatic switching device "close stand-by power supply time delay", "close the mode of segmentation time delay" definite value, realized two sets of sequence control action logics of throwing oneself fully.
(IV) the utility model discloses a concatenate corresponding circuit breaker auxiliary switch contact in first switch and second switch combined floodgate export return circuit, realize two sets of fully automatic switching device within a definite time prevent mistake throw electric interlocking function.
(V) the utility model discloses can adopt to insert circuit breaker control switch handle separating brake position signal and realize the hand jump shutting spare power automatic switching function, promptly, when the switching off is carried out to the operating personnel hand operated switch, the operating handle contact is closed, and it carries out the hand jump shutting to the spare power automatic switching device to open out the signal. The utility model discloses can also adopt to insert the action of switching spare power automatic switching of circuit breaker protection tripping contact signal shutting.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A double-machine linkage system of automatic backup power switch is characterized in that a first power supply, a second power supply and a third power supply are arranged in an application place of the system, the system comprises a switch module, an automatic backup power switch module and a monitoring module, wherein,
the switch module comprises a first switch, a second switch and a third switch; the first switch is arranged on the first power supply incoming line, the second switch is arranged on the second power supply incoming line, and the third switch is arranged on the third power supply incoming line;
the spare power automatic switching module comprises a first spare power automatic switching device and a second spare power automatic switching device; the first spare power automatic switching device is respectively electrically connected with the first switch and the third switch and is configured to control the two switches; the second spare power automatic switching device is respectively electrically connected with the second switch and the third switch and is configured to control the two switches;
the monitoring module comprises a first voltage transformer, a second voltage transformer and a third voltage transformer; the first voltage transformer is respectively and electrically connected with a first power supply inlet wire and the first spare power automatic switching device, the second voltage transformer is respectively and electrically connected with a second power supply inlet wire and the second spare power automatic switching device, and the third voltage transformer is respectively and electrically connected with a third power supply inlet wire, the first spare power automatic switching device and the second spare power automatic switching device.
2. The automatic transfer double-motor linkage system as claimed in claim 1, wherein the outlet loop of the second switch is connected in series with the auxiliary switch contact of the first switch.
3. The automatic backup power switching double-machine linkage system according to claim 1, wherein the switch module further comprises a fourth switch and a fifth switch, the fourth switch and the fifth switch are arranged on the bus and divide the bus into a first bus section, a third bus section and a second bus section in sequence;
the first spare power automatic switching device is also electrically connected with the fourth switch and is configured to control the fourth switch;
the second spare power automatic switching device is also electrically connected with the fifth switch and is configured to control the fifth switch.
4. The automatic standby power switching double-motor linkage system according to claim 3, wherein the outlet loop of the fourth switch is connected in series with the auxiliary switch contact of the fifth switch.
5. The automatic transfer double-motor linkage system as claimed in claim 3, wherein the first, second, third, fourth and fifth switches are circuit breakers.
6. The automatic standby power switching double-machine linkage system according to claim 3, wherein the monitoring module further comprises a fourth voltage transformer, a fifth voltage transformer and a sixth voltage transformer, wherein,
the fourth voltage transformer is electrically connected with the first bus section and the first spare power automatic switching device respectively;
the fifth voltage transformer is electrically connected with the second bus section and the second spare power automatic switching device respectively;
and the sixth voltage transformer is respectively and electrically connected with the three bus sections, the first spare power automatic switching device and the second spare power automatic switching device.
7. The automatic standby power switching double-machine linkage system according to claim 3, wherein the monitoring module further comprises a first current transformer, a second current transformer and a third current transformer, wherein,
the first current transformer is arranged on the first power supply inlet wire and is electrically connected with the first spare power automatic switching device, or the first current transformer is respectively electrically connected with the first power supply inlet wire and the first spare power automatic switching device;
the second current transformer is arranged on the second power supply inlet wire and is electrically connected with the second spare power automatic switching device, or the second current transformer is respectively electrically connected with the second power supply inlet wire and the second spare power automatic switching device;
and the third current transformer is arranged on a third power supply inlet wire and is respectively and electrically connected with the first spare power automatic switching device and the second spare power automatic switching device.
8. The automatic transfer double-motor linkage system as claimed in claim 1, wherein the first power source and the second power source are both generators.
9. The automatic power switching double-motor linkage system according to claim 1, wherein the distribution voltage of the third power supply is 10-66 kV.
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| CN202121960878.1U CN214314711U (en) | 2021-08-20 | 2021-08-20 | Backup power automatic switching dual-machine linkage system |
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