Spare power automatic switching passive voltage logic reconstruction device and method

Abstract

The invention discloses a spare power automatic switching passive voltage logic reconstruction device and method, and belongs to the technical field of power systems, and the device comprises a first voltage collection module which is disposed on a first bus and is used for collecting the voltage of the first bus; the second voltage acquisition module is arranged on the second bus and is used for acquiring the voltage of the second bus; the first bus tie circuit breaker is used for connecting the first bus with a first power supply; the second bus tie circuit breaker is used for connecting a second bus with a second power supply; and the spare power automatic switching device is connected with the output ends of the first voltage acquisition module and the second voltage acquisition module, and the output end of the first spare power automatic switching device is connected with the first bus tie circuit breaker and the second bus tie circuit breaker. After the bus is powered off and the buscouple is separated, the bus maintenance pressing plate is put into use, and the voltage virtual technology is adopted, so that the remote spare power automatic switching device can be charged in a positive operation mode when a section of bus in the station is powered off.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power system, more particularly, especially relates to a passive voltage logic reconstruction device and method for automatic bus transfer equipment. BACKGROUND

[0002] Automatic bus transfer equipment (ABT) is an important automatic control device in the power system, which is mainly used for automatically and quickly putting the standby power into operation when the normal working power fails, so as to ensure the continuity of power supply. It is mainly used for the power supply system of transformer substation bus and important load.

[0003] The automatic bus transfer equipment is used for continuously monitoring the working power voltage, detecting the circuit breaker state position, judging the system operation mode, starting when the working power voltage disappears and the working power circuit breaker trips under the condition that the standby power voltage is normal, and the action logic does not trip the working power circuit breaker, and after a short delay and standby power circuit breaker, the repeated action is locked.

[0004] Under the existing technical conditions, the automatic bus transfer equipment collects the voltages of two busbars, the incoming line current, the voltage, the position and the position of the section, judges the system operation mode, charges when the charging condition is met, and discharges when the busbar voltage is lost or any discharge condition is met. Therefore, after the busbar power failure, the system operation mode cannot meet the remote automatic bus transfer charging condition, the remote automatic bus transfer discharges, and the entire power system causes risk warning and reduces power supply reliability.

[0005] Therefore, it is necessary to develop an automatic bus transfer passive voltage logic reconstruction device. SUMMARY

[0006] In view of the above or the deficiencies in the prior art, the present application provides an automatic bus transfer passive voltage logic reconstruction device and method, which mainly relates to the function of retaining the remote automatic bus transfer of the 110kV automatic bus transfer device in the station after the first busbar exits operation. The actual collected voltage of the device is connected to the collected value of the exit operation in the form of hardware plus software, so that the automatic bus transfer device in the station still retains the remote automatic bus transfer function, and the power supply reliability is improved.

[0007] To solve the above technical problems, the present application provides the following technical scheme:

[0008] In a first aspect, the present application provides an automatic bus transfer passive voltage logic reconstruction device, comprising:

[0009] A first voltage acquisition module is arranged on the first busbar and used for acquiring the first busbar voltage.

[0010] A second voltage acquisition module is arranged on the second bus and used for acquiring the second bus voltage.

[0011] A first bus tie circuit breaker is used for connecting the first bus with the first power supply.

[0012] A second bus tie circuit breaker is used for connecting the second bus with the second power supply.

[0013] The first backup power supply device is connected with the output end of the first voltage acquisition module and the second voltage acquisition module, and the output end of the first backup power supply device is connected with the first bus tie circuit breaker and the second bus tie circuit breaker.

[0014] As a further technical solution of the present application, the bus maintenance pressing plate is put into use when no voltage signal is detected on the first bus / second bus, the voltage information of the second bus / first bus is taken as the virtual voltage of the second bus / first bus, the backup power supply device sends a starting signal to the first backup power supply device / second backup power supply device, and the virtual voltage of the bus maintenance pressing plate supplies power to the load on the second bus / first bus.

[0015] As a further technical solution of the present application, the backup power supply device is connected with a third power supply which is independent of the first power supply and the second power supply.

[0016] As a further technical solution of the present application, the bus maintenance pressing plate comprises:

[0017] A virtual voltage generation unit is used for generating a virtual voltage signal with an amplitude, phase and frequency meeting the detection requirements of the backup power supply device when the bus is powered off;

[0018] A pressing plate state detection unit is used for transmitting the put-in / put-out state of the maintenance pressing plate to the backup power supply device.

[0019] As a further technical solution of the present application, the backup power supply device comprises:

[0020] A logic judgment module is used for judging whether to enable the virtual voltage according to the first bus voltage state, the first bus tie circuit breaker position and the bus maintenance pressing plate state;

[0021] A backup power supply control module is configured to shield the actual voltage detection and execute the backup power supply logic when the virtual voltage is enabled.

[0022] As a further technical solution of the present application, the first backup power supply control module comprises:

[0023] A bus tie circuit breaker opening and closing module is used for controlling the second bus tie circuit breaker to be disconnected with the second power supply.

[0024] The bus maintenance pressing plate input module is used for connecting the first power supply and the second bus as a load power supply of the second bus.

[0025] The voltage mapper is used for mapping the voltage information collected by the second voltage collection module as the first bus voltage information.

[0026] In a second aspect, the application further provides a passive voltage logic reconstruction method of the backup automatic switching device, comprising:

[0027] The voltage states of the first bus and the second bus are monitored in real time through the first voltage collection module and the second voltage collection module.

[0028] When the power failure of the target bus is detected and the preset condition is met, the virtual voltage is generated through the bus maintenance pressing plate;

[0029] The virtual voltage is input as an effective voltage to the logic judgment by the corresponding backup automatic switching device;

[0030] The backup automatic switching control logic is triggered based on the virtual voltage, and the power supply switching operation is completed.

[0031] As a further technical solution of the application, the preset condition comprises:

[0032] The bus tie breaker of the target bus is in the open position;

[0033] The maintenance pressing plate is in the input state;

[0034] The voltage of the adjacent bus is normal;

[0035] The bus short-circuit fault signal is not detected.

[0036] As a further technical solution of the application, the step of generating the virtual voltage comprises:

[0037] The voltage parameter of the backup power supply is obtained;

[0038] The synchronous virtual voltage is generated according to the backup power supply parameter;

[0039] The virtual voltage is filtered to eliminate harmonic interference.

[0040] As a further technical solution of the application, it further comprises:

[0041] After the backup automatic switching action is completed, the actual bus voltage recovery situation is continuously monitored;

[0042] When the actual voltage is restored and stabilized, the virtual voltage is automatically exited and switched to the actual voltage detection mode.

[0043] The application has the following beneficial effects:

[0044] 1. The application adds an extended analog sampling plug-in, increases the device CPU criterion, after the bus is powered off and the bus coupler is divided, the bus maintenance pressure plate (I mother / II mother) is put in, the bus after power failure and the incoming line voltage are defined through the software level, so that the remote spare power automatic switching device can be in the station in a section of bus power failure mode.

[0045] 2. In the case of station in a section of bus power failure, the remote spare power automatic switching device can maintain normal charging, improve the reliability of power supply; not dependent on the traditional secondary voltage parallel mode, the device realizes zero physical connection parallel, eliminates the risk of voltage reverse power supply; not in the traditional way, in the secondary circuit incoming line modification line to realize parallel, can quickly realize automatic parallel in the device, which can improve 1 hour in time compared with manual operation.

[0046] 3. The application continuously monitors the actual bus voltage recovery after the spare power automatic switching action is completed; when the actual voltage is restored and stable, the virtual voltage is automatically exited and switched to the actual voltage detection mode.

[0047] 4. The application adopts voltage virtual technology, establishes an independent voltage register, copies the running three-phase voltage to the shutdown bus storage area, and verifies the spare power automatic switching related logic function through the virtual voltage of the device, and eliminates the secondary voltage reverse power supply.

[0048] 5. The application adopts double safety isolation: voltage air switch pull and voltage parallel handle in "decommissioning" position and mapping level: bus coupler without flow, circuit breaker division opening, shutdown bus voltage less than 5V, and maintenance pressure plate put in, to avoid device malfunction. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creating labor intensity.

[0050] Figure 1 The spare power automatic switching passive voltage logic reconstruction device structure diagram provided for the embodiment of the application;

[0051] Figure 2 The spare power automatic switching passive voltage logic reconstruction device control structure diagram provided for the embodiment of the application;

[0052] Figure 3 The specific embodiment logic judgment diagram provided for the embodiment of the application;

[0053] Figure 4 The specific embodiment schematic diagram provided for the embodiment of the application;

[0054] Figure 5 The flow chart of the passive voltage logic reconstruction method of the backup power supply device is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0055] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0056] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein, that the present application can be practiced with other than the described embodiments and that variations from the particular embodiments described herein can be made and still be within the scope of the present application.

[0057] It should be noted that the technical terms or scientific terms used in the embodiments of the present application should be understood as the common meanings understood by those skilled in the art unless otherwise defined. The terms "first", "second", and similar terms used in the present disclosure do not represent any order, number, or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. It can be a fixed connection or a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be an internal connection of two elements or an interaction relationship between two elements, unless otherwise defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. "Up", "down", "left", "right", and the like are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or optional embodiment that excludes other embodiments. It should be noted that the embodiments of the present application can be applied to any applicable scenario.

[0059] Embodiment one

[0060] Reference is made to Figure 1 and Figure 2The passive voltage logic reconfiguration device provided by the embodiment of the application comprises:

[0061] The first voltage acquisition module 10 is arranged on the first bus and is used for acquiring the first bus voltage.

[0062] The second voltage acquisition module 20 is arranged on the second bus and is used for acquiring the second bus voltage.

[0063] The first bus tie circuit breaker 30 is used for connecting the first bus with the first power supply.

[0064] The second bus tie circuit breaker 40 is used for connecting the second bus with the second power supply.

[0065] The backup power supply device 50 is connected with the output ends of the first voltage acquisition module and the second voltage acquisition module, and the output end of the first backup power supply device is connected with the first bus tie circuit breaker and the second bus tie circuit breaker.

[0066] In the embodiment of the application, the first bus and the second bus are two groups of adjacent power supply lines of a transformer substation, the first bus is connected with a first power station through the first bus tie circuit breaker, the second bus is connected with a second power station through the second bus tie circuit breaker, the first bus and the second bus are controlled by the backup power supply device, the second bus is connected when the first bus loses voltage, and the first bus is connected when the second bus loses voltage.

[0067] The backup power supply device can maintain normal charging of the backup power supply device when a section of bus in a station loses power, and the reliability of power supply is provided, the first bus and the second bus are connected with the backup power supply device, and the traditional secondary voltage parallel mode is not relied on, the risk of voltage reverse power supply is eliminated, the backup power supply device is used to realize parallel connection in the secondary loop incoming line, and the switching efficiency is improved by 1 hour compared with manual operation.

[0068] The first voltage acquisition module and the second voltage acquisition module are respectively used for acquiring the first bus voltage and the second bus voltage, and are used for judging whether the first bus and the second bus lose power, when the first bus loses power, the first bus circuit breaker and the second bus circuit breaker are disconnected, the backup power supply device is connected with the first bus, and the normal working voltage of the first bus is provided.

[0069] In the embodiment of the application, the bus maintenance pressing plate 60 is further included, when no voltage signal is detected on the first bus / second bus, the bus maintenance pressing plate is put into operation, the voltage information of the second bus / first bus is used as the virtual voltage of the second bus / first bus, the backup power supply device sends a starting signal, and the virtual voltage of the bus maintenance pressing plate is used for power supply of the load on the second bus / first bus.

[0070] In the embodiment of the present application, the backup power supply is connected with the backup power supply device, and the backup power supply is a third power supply independent of the first power supply and the second power supply.

[0071] The busbar maintenance pressing plate 60 comprises:

[0072] The virtual voltage generation unit 601 is configured to generate a virtual voltage signal with an amplitude, a phase and a frequency meeting the detection requirements of the backup power supply device when detecting busbar power failure;

[0073] The pressing plate state detection unit 602 is configured to transmit the input / exit state of the maintenance pressing plate to the backup power supply device.

[0074] In the embodiment of the present application, the backup power supply device 50 comprises:

[0075] The logic judgment module 501 is configured to judge whether to enable the virtual voltage according to the first busbar voltage state, the first busbar coupling circuit breaker position and the busbar maintenance pressing plate state;

[0076] The backup power supply control module 502 is configured to shield the actual voltage detection and execute the backup power supply logic when the virtual voltage is enabled.

[0077] The backup power supply control module 502 comprises:

[0078] The busbar coupling circuit breaker opening / closing module 521 is configured to control the second busbar coupling circuit breaker to be disconnected from the second power supply;

[0079] The busbar maintenance pressing plate input module 522 is configured to connect the first power supply and the second busbar as the load power supply of the second busbar;

[0080] The voltage mapper 523 is configured to map the voltage information collected by the second voltage collection module into the first busbar voltage information.

[0081] In the embodiment of the present application, the first busbar voltage state, the first busbar coupling circuit breaker position and the busbar maintenance pressing plate state are used to judge whether to enable the virtual voltage; the second busbar coupling circuit breaker is controlled to be disconnected from the second power supply by the busbar coupling circuit breaker opening / closing module 521;

[0082] The first power supply and the second busbar are connected as the load power supply of the second busbar by the busbar maintenance pressing plate input module 522; and the voltage information collected by the second voltage collection module is mapped into the first busbar voltage information by the voltage mapper 523.

[0083] The backup power supply device provides a sampling module, and provides criteria for the first logic judgment unit and the second logic judgment unit. After the busbar power failure and the busbar coupling position, the busbar maintenance pressing plate (I bus / II bus) is input, the voltage of the busbar after power failure and the incoming line voltage are defined by the software layer, so that the remote backup power supply device can be in the station in the section busbar power failure mode.

[0084] Referring to Figure 3 During the maintenance of any section of the second busbar, the second substation needs to exit the remote spare power automatic switching function and all pressure plates due to the loss of busbar voltage, and at this time the risk of the power grid increases, and if the second substation fails to lose voltage at this time, all loads in the station will be lost due to the exit of the spare power automatic switching device. In the case of power failure of one of the busbars, for example, the first busbar, the busbar maintenance hard pressure plate is put into operation, and through logical design and hardware collection, the second spare power automatic switching device on the second busbar is charged. If the first busbar fails to lose voltage at this time, the second spare power automatic switching device is charged and has the action condition, then the second spare power automatic switching device is tripped into the line 1, and the first spare power automatic switching device on the first busbar is signaled, and the first busbar is delayed and combined with the first bus tie circuit breaker. The first power supply on the first busbar carries the full station load on the second busbar, improves the reliability of power supply, and reduces the power grid early warning.

[0085] Referring to Figure 4 The voltage sampling value of the second busbar is mapped to the voltage value of the first busbar through the voltage mapper, and the spare power automatic switching criterion is started to open the spare power automatic switching device.

[0086] Embodiment two

[0087] Referring to Figure 5 The application also provides a passive voltage logic reconstruction method of the spare power automatic switching device, comprising:

[0088] Step S1, the voltage states of the first busbar and the second busbar are monitored in real time through the first voltage acquisition module and the second voltage acquisition module;

[0089] Step S2, when the target busbar is detected to be powered off and the preset condition is met, a virtual voltage is generated through the busbar maintenance pressure plate;

[0090] Step S3, the virtual voltage is input as an effective voltage for logical judgment by the corresponding spare power automatic switching device;

[0091] Step S4, the spare power automatic switching control logic is triggered based on the virtual voltage, and the power supply switching operation is completed.

[0092] When the target busbar is detected to be powered off and the preset condition is met, the four conditions are met at the same time:

[0093] The bus tie circuit breaker of the target busbar is in the open position;

[0094] The maintenance pressure plate is in the put-in state;

[0095] The voltage of the adjacent busbar is normal;

[0096] The busbar short-circuit fault signal is not detected.

[0097] The step of generating the virtual voltage comprises: acquiring a voltage parameter of the backup power supply; generating a synchronous virtual voltage according to the backup power supply parameter; and filtering the virtual voltage to eliminate harmonic interference.

[0098] In the embodiment of the application, after the action of the backup power supply is completed, the actual busbar voltage recovery is continuously monitored; when the actual voltage is recovered and stabilized, the virtual voltage is automatically exited and switched to the actual voltage detection mode.

[0099] The application adopts a voltage virtualization technology: the device copies the running three-phase voltage to the storage area of the outage busbar through the relevant logical criteria of hardware + software, establishes an independent voltage register, and verifies the related logical functions of the backup power supply through the virtual voltage, and eliminates the secondary voltage reverse power supply.

[0100] Double safety isolation: the voltage air switch is pulled open, the voltage parallel handle is in the "split" position, the mapping level is that the bus tie has no current, the circuit breaker is in the open-in state, the voltage of the outage busbar is less than 5V, and the maintenance pressure plate is put in, so as to avoid the misoperation of the device.

[0101] Self-adaptive backup power supply related signal: after the maintenance pressure plate is put in, the device charges through the collected voltage and the related open-in, and the related signals of the main station dispatch are marked as "manual replacement", so that the main station personnel can understand the device state in the running and maintenance states.

[0102] Fault operating condition before running: any busbar of the second substation is powered off for maintenance (taking the second busbar as an example), the device charges through the virtual voltage of the first busbar, and if the incoming line 1 of the second substation fails at this time, the second busbar loses voltage. Then the related action logic of the backup power supply is met, and the following is the action logic of the accident state:

[0103] Device detection: the real voltage of the second busbar: 0V; the virtual voltage of the first busbar: normal value (taken from the PT2 historical cache, which is a real-time collected value); the current of the incoming line second busbar breaker: 0A;

[0104] Backup power supply action logic: IF second busbar without voltage (virtual) AND first busbar without voltage (virtual) AND incoming line 1 without current = jump incoming line 1 → start the related logic of the backup power supply The backup power supply switch (bus tie maintenance pressure plate) of the first substation is turned on, and the first power supply carries all the loads of the first substation and the second substation.

[0105] Result: the first backup power supply device correctly acts; the second busbar maintenance equipment has no risk of live working.

[0106] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the forms disclosed herein. Although several example aspects and embodiments have been discussed, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A passive voltage logic reconstruction device with automatic switching, characterized in that: include: A first voltage acquisition module is provided on the first bus and is used to acquire the voltage of the first bus; A second voltage acquisition module is provided on the second bus and is used to acquire the second bus voltage; A first bus tie circuit breaker is used to connect the first busbar to the first power source; A second bus tie circuit breaker is used to connect the second busbar to the second power source; The standby automatic switching device is connected to the output ends of the first voltage acquisition module and the second voltage acquisition module, and the output end of the standby automatic switching device is connected to the first bus tie circuit breaker and the second bus tie circuit breaker.

2. The passive voltage logic reconstruction device for a backup power supply according to claim 1, characterized in that: Also includes: The busbar maintenance pressure plate is put into operation when no voltage signal is detected on the first busbar / second busbar. The voltage information of the second busbar / first busbar is used as the virtual voltage of the second busbar / first busbar. The standby automatic switching device sends a start signal, and the virtual voltage of the busbar maintenance pressure plate supplies power to the load on the second busbar / first busbar.

3. The passive voltage logic reconstruction device for automatic backup power supply according to claim 1, characterized in that: include: The standby automatic switching devices are all connected to a backup power supply, and the backup power supply is a third power supply independent of the first power supply and the second power supply.

4. The passive voltage logic reconstruction device for backup power supply according to claim 2, characterized in that: include: The busbar maintenance pressing plate comprises: A virtual voltage generating unit is used to generate a virtual voltage signal whose amplitude, phase and frequency meet the detection requirements of the backup automatic switching device when a bus power outage is detected; The pressure plate status detection unit is used to transmit the entry / exit status of the maintenance pressure plate to the standby automatic entry device.

5. The passive voltage logic reconstruction device for backup power supply according to claim 1, characterized in that: include: The standby automatic switching device includes: A logic judgment module is used to determine whether to enable the virtual voltage according to the voltage status of the first busbar, the position of the first bus tie circuit breaker and the status of the busbar maintenance pressure plate; The standby automatic transfer control module is configured to shield actual voltage detection when the virtual voltage is enabled and execute the standby automatic transfer logic.

6. The passive voltage logic reconstruction device for backup power supply according to claim 5, characterized in that: include: The standby automatic transfer control module includes: A bus tie circuit breaker opening and closing module, used to control the second bus tie circuit breaker to disconnect from the second power source; A busbar maintenance pressure plate input module is used to connect the first power supply to the second busbar to supply power to the load of the second busbar; The voltage mapper is used to map the voltage information collected by the second voltage collection module into first bus voltage information.

7. A method for reconstructing the passive voltage logic of a backup automatic switch, characterized in that: The passive voltage logic reconstruction device for a backup automatic switch as claimed in any one of claims 1 to 6 comprises: The voltage status of the first bus and the second bus are monitored in real time by the first voltage acquisition module and the second voltage acquisition module; When a target busbar power outage is detected and the preset conditions are met, a virtual voltage is generated through the busbar maintenance pressure plate; The corresponding standby automatic switching device uses the virtual voltage as the effective voltage input for logic judgment; The backup automatic switching control logic is triggered based on the virtual voltage to complete the power supply switching operation.

8. The method for reconstructing the passive voltage logic of a backup power supply according to claim 7, characterized in that: The preset conditions include: The bus tie circuit breaker of the target bus is in the open position; The maintenance pressure plate is in the engaged state; The adjacent bus voltage is normal; No busbar short circuit fault signal is detected.

9. The method for reconstructing the passive voltage logic of a backup power supply according to claim 7, characterized in that: The steps of generating a virtual voltage include: Get the voltage parameters of the backup power supply; Generate synchronous virtual voltage according to backup power supply parameters; The virtual voltage is filtered to eliminate harmonic interference.

10. The method for reconstructing the passive voltage logic of a backup power supply according to claim 7, characterized in that: Also includes: After the backup automatic switching action is completed, the actual bus voltage recovery status is continuously monitored; When the actual voltage returns to stability, it automatically exits the virtual voltage mode and switches to the actual voltage detection mode.

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