CN212751798U - Multi-level loop power supply switching device - Google Patents
Multi-level loop power supply switching device Download PDFInfo
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- CN212751798U CN212751798U CN202022040380.5U CN202022040380U CN212751798U CN 212751798 U CN212751798 U CN 212751798U CN 202022040380 U CN202022040380 U CN 202022040380U CN 212751798 U CN212751798 U CN 212751798U
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Abstract
The utility model relates to an among the medium-and low-voltage power supply system, when the power breaks down, multi-level return circuit power supply auto-change over device, especially multi-level return circuit power supply auto-change over device and control method when big and medium-sized industry, enterprise power supply system break down, characterized by: the power supply switching device at least comprises power supply switching devices in different grades, and is used for sending command information of switching on, switching off and switching off locking to other power supply switching devices when a power supply line or equipment fails to switch. The utility model provides a after the trouble takes place, the position at differentiation trouble place that can be quick, the duration and the influence scope of the trouble that significantly reduces reduce the multi-level return circuit power supply auto-change over device to the production technology influence.
Description
Technical Field
The utility model relates to an among the medium-voltage and low-voltage power supply system, when the power breaks down, multistage return circuit power supply auto-change over device and control method, especially when big and medium-sized industry, enterprise power supply system break down multistage return circuit power supply auto-change over device.
Background
Because of large capacity of power grid, multiple grades (110 KV, 35KV, 6 (10) KV, 0.4KV and the like) and high power supply requirement, a standby power supply is generally provided for ensuring the reliability of power supply, and automatic power supply switching devices (hereinafter referred to as power supply switching devices) such as a standby power supply automatic switching device and a power supply fast switching device (hereinafter referred to as fast switching) are used for switching between a working power supply and the standby power supply. When the working power supply fails, the power supply switching device cuts off the failed power supply and puts the standby power supply into use. According to the requirement of relay protection selectivity, different delay time is added to the power supply switching device according to different positions of the power supply switching device to serve as level difference setting, the level difference setting method for increasing the delay time has no influence on the first-stage power supply switching device, but influences on the power supply switching device of the next stage, and the influence of the last stage is larger when the levels are larger. For example, a power supply system has four grades of 110KV, 35KV, 6 (10) KV and 0.4KV, each grade uses fast switching, the fast switching of 110KV needs no increase of delay, the fast switching of each grade needs 200 milliseconds of delay, the delay time increased to the fast switching of 0.4KV is 600 milliseconds, if a fault occurs at 0.4KV, the judgment time of the fault will be increased by 600 milliseconds, after the fault occurs, the fault duration is long, the influence is large, and after the standby power supply is put into the fast switching, the production process will be greatly influenced due to low voltage and long duration.
SUMMERY OF THE UTILITY MODEL
The utility model provides a difference settlement time in order to overcome current power supply auto-change over device will be greater than power supply auto-change over device switching time (the fast switch is generally 200 milliseconds, and spare power automatic switching generally is 1 second), causes the trouble to take place when the low-voltage level, and the trouble duration is long, the influence is big, still causes the defect of very big influence to production technology after the stand-by power supply drops into, the utility model provides a after the trouble takes place, the position at the differentiation trouble place that can be quick, the duration and the influence range of the trouble that significantly reduce, reduce the multi-level return circuit power supply auto-change over device to the production technology influence.
The utility model adopts the technical proposal that: multistage return circuit power supply auto-change over device, characterized by: the power supply switching device at least comprises power supply switching devices in loops of different grades, and the power supply switching device at least comprises: the device comprises a voltage detection sensing unit (1), a current detection sensing unit (2), a switch state, input information sensing unit (3), a control unit (4), a network interface (5) and an output control unit (6); the control unit (4) determines whether the corresponding equipment is controlled through the output control (6) according to the voltage detection sensing unit (1), the current detection sensing unit (2), the switch state, the signal of the input information sensing unit (3) and the input information of the network interface (5), and determines to send the starting switching, the locking switching and the unlocking switching information to other power supply switching devices through the network interface (5).
The network interface (5) links the power supply switching devices of different grades of loops through a network, is used for receiving and sending starting switching, locking switching and unlocking switching information, and inputs the received starting switching, locking switching and unlocking switching information into the control unit (4); or the information of starting switching, locking switching and unlocking switching sent by the control unit (4) is transmitted to other power supply switching devices.
The control unit (4) sends the information of switching on, switching off and switching off the locking to other power supply switching devices through the network interface (5) and operates through commands or commands and numbers.
The command information is: initiating a handover, or: latching switching, or either: releasing the locking switching; the command and the number are either: device numbering and initiating handover, or: device numbering and latch switching, or: device numbering and unblock switching.
The network interface (5) comprises: a public network interface, a wireless network interface, or a wired network interface.
The power supply switching device is arranged according to a control unit (4) through network link transmission information, and comprises: the network interface (5) or only set up the power supply switching device of the upper and lower levels, to the upper and lower power supply switching device transfer information; the network interface (5) can also be arranged to be connected with the same level, the upper level and the lower level simultaneously and transmit information to the power supply switching device of the same level, the upper level and the lower level.
The utility model has the advantages that: the power supply switching devices are connected into the microgrid through the network interface 5, so that the positions of faults can be rapidly distinguished after the faults occur, the power supply switching devices which are directly connected with fault points and respond at the first time are switched, information is transmitted to other power supply switching devices, other power supply switching devices which do not need to be switched are locked, switching is prevented, and the setting time of the level difference of the power supply switching devices can be greatly reduced as the information transmission time is far shorter than the switching completion time. The power supply switching device which needs to be switched after the fault occurs can be switched quickly, the duration and the influence range of the fault are greatly reduced, and the influence on the production process is reduced.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a schematic illustration of a hierarchy of an embodiment of the present invention;
FIG. 2 is a block diagram of a power supply switching device;
fig. 3 is a schematic connection diagram in which the network interface 5 is simplified to perform only upper and lower level connection networking, and the module 00 is the power supply switching device 00, which is the same as the other and following ones;
fig. 4 is a schematic connection diagram of a network with connections at the upper, lower and same level of the network interface 5;
fig. 5 is a single power supply switching device of the present invention, which is applied to a single bus bar segmenting system, and can also be used for a single bus bar non-segmenting system. When the single bus is not segmented, the bus-coupled switch equivalent to the single bus segmentation is in a closed position, and the voltages of the two buses are the same;
fig. 6 is a system diagram of the power supply switching device connection of the present invention applied to two simple levels, and other more level systems can be extended by this simple level system.
In the figure, 1, a voltage detection sensing unit; 2. a current detection sensing unit; 3. a switch state, input information sensing unit; 4. a control unit; 5. a network interface; 6. output control;
module 00 is a first-stage power supply switching device, modules 01 and 02 are second-stage power supply switching devices, a third-stage power supply switching device is divided into two parts, module 03, module 04 and module 05 are subordinate of module 01, and module 06, module 07 and module 08 are subordinate of module 02;
the first transformer and the second transformer can be omitted; 1DL and 2DL are incoming switches, and 3DL is a bus coupler switch; the voltage of the first incoming line V01, the voltage of the second incoming line V02, the voltage of the section I of the bus V03 and the voltage of the section II of the bus V04; the first current I01 and the second current I02 are input;
module 00 is the superior of module 01 and module 02, and module 01 and module 02 are the same level; the module 00 controls the division and combination of 1DL, 2DL and 3DL to switch through the output control 6; the module 01 controls the division and combination of 4DL, 5DL and 6DL to switch through the output control 6; the module 02 controls the division and combination of 7DL, 8DL and 9DL to switch through the output control 6; limited by the figure, both the module 01 and the module 02 can have a lower level and a same level, which are not shown in the figure, and the control methods of other levels are the same as those of the module 01 and the module 02; the control methods of the modules 01 and 02 and their subordinate stages are the same as those of the module 00 and the modules 01 and 02.
Detailed Description
As shown in fig. 1, the multi-level loop power supply switching device at least includes power supply switching devices in different levels of loops, and is used for sending information of switching on, switching off and switching off locking to other power supply switching devices when a power supply line or equipment fails and is switched over. The vertical power supply switching device for different stages may include the highest stage (first stage), the second stage, the third stage … …, the nth stage, or only two stages, and only four stages are shown in the figure for illustration. Each stage includes a first module, a second module … …, an nth module, or may have only one module.
The power supply switching devices are distributed in different grades of power supply loops according to grades.
As shown in fig. 2, the power supply switching device at least includes: the system comprises a voltage detection sensing unit 1, a current detection sensing unit 2, a switch state and input information sensing unit 3, a control unit 4, a network interface 5 and an output control 6; the voltage detection sensing unit 1, the current detection sensing unit 2, the switch state, the input information sensing unit 3, the control unit 4, the network interface 5 and the output control 6 form a module, as shown in different grades of modules in fig. 1, the highest grade includes a first module to an nth module, the second grade also includes a first module to an nth module, the third grade also includes a first module to an nth module, and the fourth and fifth grades also include a first module to an nth module.
The control unit 4 of the power supply switching device determines whether to control the corresponding equipment through the output control 6 according to the voltage detection sensing unit 1, the current detection sensing unit 2, the switch state, the signal of the input information sensing unit 3 and the input information of the network interface 5, and determines to send the start switching, the locking switching and the unlocking switching information to other power supply switching devices through the network interface 5.
The network interface 5 links the power supply switching device, is used for receiving and sending the information of starting switching, locking switching and unlocking switching, and inputs the received information of starting switching, locking switching and unlocking switching to the control unit 4.
The control unit 4 sends information of switching on, switching off and switching off of locking to other power supply switching devices through the network interface 5, and the information is operated through commands or commands and numbers, as shown in fig. 1, the highest level includes a first module to an nth module, the second level also includes a first module to an nth module, the third level also includes a first module to an nth module, the fourth level and the fifth level also include a first module to an nth module, the control unit 4 sends information of switching on, switching off and switching off of locking to other power supply switching devices through the network interface 5 through commands or commands and numbers, as shown in the connection mode in fig. 3, when the module 00 is switched, the module 00 sends commands to the module 01 and the module 02 respectively, and then the module 01 sends commands to the module 03, the module 04 and the module 05, and the other route is sent to the module 06, the module 02, Module 07, module 08 send commands.
As shown in the connection mode in fig. 4, when the module 00 is switched, the module 00 sends a command to the modules 01 and 02, the module 01 sends a command to the module 04, the module 04 sends a command to the modules 03 and 05, the other routing module 02 sends a command to the module 07, and the module 07 sends a command to the modules 06 and 08.
Fig. 3 and 4 show two different structural diagrams of the same distribution of the power supply switching devices in different grade loops, and the codes and commands of the power supply switching devices in the same distribution are different, so that different network loops are formed.
As shown in fig. 3, the first stage power switching device is a module 00. The power supply switching device of the second stage is a module 01 and a module 02. The power supply switching device of the third stage is divided into two parts, namely a module 03, a module 04 and a module 05 which are subordinate to the module 01, and a module 06, a module 07 and a module 08 which are subordinate to the module 02. Because the connection networking is only longitudinally connected, information can be directly transmitted and received between an upper level and a lower level, and information transmission and reception between peers is forwarded by the upper level. The number of power supply switching devices per stage is determined by the power supply system and the operation mode, and the figure is only used for illustration. When the number of the power supply switching devices is small, the power supply switching devices are preferably directly connected through the network interface 5 of the power supply switching device, and when the number is large, the power supply switching devices can be connected through a relay device such as a gateway.
As shown in fig. 4, the first stage power switching device is a module 00. The power supply switching device of the second stage is a module 01 and a module 02. The third-stage power supply switching device is divided into two parts, namely a module 03, a module 04 and a module 05 which are subordinate to a module 01, and a module 06, a module 07 and a module 08 which are subordinate to a module 02. Because the connection networking is longitudinal and partially transverse connection, information is transmitted and received between an upper level, a lower level or a peer level, the information can be directly transmitted and received by direct connection, and the information which is not directly connected is transmitted by other power supply switching devices. The number of power supply switching devices per stage is determined by the power supply system and the operation mode, and the figure is only used for illustration. When the number of the power supply switching devices is small, the power supply switching devices are preferably directly connected through the network interface 5 of the power supply switching device, and when the number is large, the power supply switching devices can be connected through a relay device such as a gateway.
The command is as follows: initiating a handover, or: latching switching, or either: and releasing the locking switching. The power supply switching device starts to switch when the switching is started, the power supply switching device stops partially or completely starting switching functions when the switching is locked, and the power supply switching device which is suspended when the switching is unlocked partially or completely starts switching functions to be normal.
The command and the number are either: device numbering and initiating handover, or: device numbering and latch switching, or: device numbering and unblock switching.
The command and the number are either: equipment numbering group and start switching, or: the equipment number group and the locking are switched, or: device number group and unblock switching.
The transmitted blocking switching information can be released by adopting time limit or threshold value limit, so that the blocking switching information can not be transmitted. The time limit of the locking switching information can be automatically released (i.e. the switching is started in a delayed manner), for example, the effective time of the locking switching information can be set to 200 milliseconds, after the locking switching information sent by the upper power supply switching device is received, partial or all switching functions are started within 200 milliseconds in a pause manner, the upper switching device completes the switching within 200 milliseconds, the locking switching information is not sent to the lower stage, when the time reaches 200 milliseconds, the locking switching information of the lower switching device is automatically released, and the partial or all switching functions which are stopped are recovered to be normal. The latch switching information may also be released by using a threshold, for example, when the set voltage is greater than 90% of the rated voltage, the latch switching information is automatically released, when the higher-level power supply switching device switches, the latch switching information is sent to the lower level, at this time, the voltage is generally lower than 90% of the rated voltage, the switching of the higher-level power supply switching device is completed, the voltage returns to normal, the voltage is higher than 90% of the rated voltage, the higher-level power supply switching device does not need to send the latch switching release information to the lower level, and the latch switching information of the lower-level power supply switching device is automatically.
The network interface 5 comprises: a public network interface, a wireless network interface, or a wired network interface.
As shown in fig. 5, a single power supply switching device control circuit embodiment is provided.
As shown in fig. 6, a two-stage power switching device control circuit embodiment is provided.
The control method of the multi-stage loop power supply switching device is explained with reference to fig. 6:
1) when a fault occurs on 1DL, the fault is defined as a current-level fault for the module 00, and is defined as a superior-level fault for the module 01 and the module 02, voltages of the bus I, III and V sections are simultaneously affected, the module 00 is a power supply switching device for detecting the first fault time, switching is performed, in order to prevent the lower-level module 01 and the module 02 from being switched, and when the module 00 is switched, locking switching information is sent to other power supply switching devices of the junction network interface 5, namely the module 01 and the module 02; the module 00 jumps from 1DL to 3DL, the switching is successful, the voltage of the I section of the bus section is recovered to be normal, the voltages of the III section and the V section of the bus are also recovered to be normal, and the module 00 sends unlocking switching information to the module 01 and the module 02; if the module 00 fails to switch 1DL or 3DL, the module 00 sends information for releasing the latch switching or starting the switching (or both) to the module 01 or the module 02, and the module 01 or the module 02 switches.
2) When a fault occurs on 1DL, the module 00 is a power supply switching device for detecting the first fault time, and should perform switching, and send latching switching information to the power supply switching devices directly connected to the fault point and responding subsequently, that is, the modules 01 and 02, and after receiving the latching switching information, the modules 01 and 02 forward the same information to the lower level thereof. If the switching is successful, the module 00 sends unlocking switching information to the modules 01 and 02, and after receiving the unlocking switching information, the modules 01 and 02 can directly forward the unlocking switching information to the lower level of the modules, and can also judge the voltage and send the unlocking switching information to the lower level after confirming that the fault disappears.
3) When a failure occurs on 1DL, the module 00 switches, and if the module 00 fails to switch, it sends information (or both of them) to release the latch switch or start the switch to the modules 01 and 02, and the modules 01 and 02 switch and send the latch switch information to the lower stage (if the latch switch information of the lower stage is valid, it may not be sent). The module 01 is opened and closed by 4DL and 6DL, the voltage of the bus III section is recovered to be normal, the module 02 is opened and closed by 7DL and 9DL, and the voltage of the bus V section is recovered to be normal; if the switching is successful, the module 01 and the module 02 send unblocking switching information to the lower stage. If the switching of the modules 01 and 02 fails (the switch is tripped or the switch is closed unsuccessfully), the power supply switching device with failed switching sends unlocking switching information or starting switching information (or both the unlocking switching information and the starting switching information) to the lower stage of the power supply switching device, and the lower stage of the power supply switching device performs switching.
4) If a fault occurs between 4-1DL and 4DL, the fault is defined as a lower-level fault for the module 00, a current-level fault for the module 01 and an adjacent fault for the module 02, voltages of the I, III and V sections of the bus are affected at the same time, the module 00 cannot be switched, the module 01 is switched, and the switching process of the module 01 is the same as that of the module 00. When the module 01 is switched, the locking switching information is sent to the lower stage, and if the switching is successful, the unlocking switching information is sent to the lower stage; if the handover fails, an unblock handover or an initiate handover message (or both) is sent to the lower stage. When the module 01 is switched, the locking switching information may be transmitted to the module 02 or may not be transmitted, as necessary. The lock switching information transmitted by the same peer may be released by the sender (module 01) or the repeater (module 00) by transmitting the lock switching release information, or may be automatically released by setting a time limit or a threshold limit.
5) When a fault occurs between 4-1DL and 4DL and the module 01 is switched, the module 02 forwards the same information to other peer power supply switching devices needing to be forwarded when receiving the locking switching and unlocking switching information sent by the module 01 (or forwarded by the module 00, the same is used hereinafter); the module 02 receives the locking switching information sent by the module 01 and sends the locking switching information to the next stage; after the module 02 receives the unblocking switching information or the blocking switching information sent by the module 01 is invalid, the module 02 sends the unblocking switching information to the lower stage, and also can judge the fault, confirm that the unblocking switching information is sent again after the fault disappears, if the fault does not disappear, the module 02 switches, and when the module 02 switches, the module 02 sends the blocking switching information to the lower stage (if the blocking switching information of the lower stage is valid, the blocking switching information can not be sent), if the switching is successful, the unblocking switching information is sent to the lower stage, and if the switching is failed, the unblocking switching information or the switching starting information (or both the unblocking switching information and the switching information are sent) is sent to the lower stage and is switched. If the module 01 needs to be switched, the module 02 does not send locking switching information to the module 02 if the module 01 needs to be switched, and the switching process of the module 02 is the same as that of the module 01, and the locking switching information is sent to the lower stage during switching; if the switching is successful, the unlocking switching information is sent to the lower stage; if the handover fails, either unblock handover information or initiate handover information (or both) is sent to the lower stage.
7) Faults occur between all outgoing switches such as an incoming switch 1DL and a 4-1DL of a bus I section, the faults are defined as lower-level faults for a module 00, the faults are defined as the current-level faults for a module 01 and a module 02, the module 00 is not switched, the modules 01 and the module 02 are switched, and locking switching information is sent to the lower level of the modules when the modules are switched; if the switching is successful, the unlocking switching information is sent to the lower level of the switching; if the handover fails, the unblocking handover information or the initiating handover information (or both) is transmitted to the lower level thereof.
Because the power supply system is symmetrically arranged, when a fault occurs on 2DL, or between 5-1DL and 5DL, or between all outgoing switches of incoming switches 2DL and 5-1DL and the like of a bus II section, the controlled switches are different only during switching, and the control methods of the upper stage, the lower stage and the same stage are the same.
Claims (5)
1. Multistage return circuit power supply auto-change over device, characterized by: the power supply switching device at least comprises power supply switching devices in loops of different grades, and the power supply switching device at least comprises: the device comprises a voltage detection sensing unit (1), a current detection sensing unit (2), a switch state, input information sensing unit (3), a control unit (4), a network interface (5) and an output control unit (6); the control unit (4) determines whether the corresponding equipment is controlled through the output control (6) according to the voltage detection sensing unit (1), the current detection sensing unit (2), the switch state, the signal of the input information sensing unit (3) and the input information of the network interface (5), and determines to send the switching-on switching information, the switching-off switching information and the switching-off switching information of the unlocking switching to other power supply switching devices through the network interface (5).
2. The multi-stage loop supply switching apparatus of claim 1, wherein: the network interface (5) links the power supply switching devices of different grades of loops through a network, is used for receiving and sending starting switching, locking switching and unlocking switching information, and inputs the received starting switching, locking switching and unlocking switching information into the control unit (4); or the information of starting switching, locking switching and unlocking switching sent by the control unit (4) is transmitted to other power supply switching devices.
3. The multi-stage loop supply switching apparatus of claim 1, wherein: the control unit (4) sends the information of switching on, switching off and switching off the locking to other power supply switching devices through the network interface (5) and operates through commands or commands and numbers.
4. The multi-stage loop supply switching apparatus of claim 1, wherein: the network interface (5) comprises: a public network interface, a wireless network interface, or a wired network interface.
5. The multi-stage loop supply switching apparatus of claim 1, wherein: the power supply switching device is arranged according to a control unit (4) through network link transmission information, and comprises: the network interface (5) or only set up the power supply switching device of the upper and lower levels, to the upper and lower power supply switching device transfer information; the network interface (5) can also be arranged to be connected with the same level, the upper level and the lower level simultaneously and transmit information to the power supply switching device of the same level, the upper level and the lower level.
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| CN202022040380.5U CN212751798U (en) | 2020-09-17 | 2020-09-17 | Multi-level loop power supply switching device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952974A (en) * | 2020-09-17 | 2020-11-17 | 西安润辉科技发展有限公司 | Multi-level loop power supply switching device and control method |
| CN113708609A (en) * | 2021-07-16 | 2021-11-26 | 厦门华睿晟智能科技有限责任公司 | AC/DC integrated power supply and control method |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952974A (en) * | 2020-09-17 | 2020-11-17 | 西安润辉科技发展有限公司 | Multi-level loop power supply switching device and control method |
| CN113708609A (en) * | 2021-07-16 | 2021-11-26 | 厦门华睿晟智能科技有限责任公司 | AC/DC integrated power supply and control method |
| CN113708609B (en) * | 2021-07-16 | 2023-08-22 | 厦门华睿晟智能科技有限责任公司 | AC/DC integrated power supply and control method |
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