Auxiliary power interconnection fast switching optimization method and device

Abstract

The invention belongs to the technical field of power systems, and discloses a method and a device for optimizing interconnection and fast switching of station service power. The method comprises the following steps: acquiring switching states during normal operation, wherein the switching states comprise a 1DL switching state, a 2DL switching state and a bus switching state; after the interconnection fast switching device is powered on, detecting voltage of a first section of bus, voltage of a second section of bus and a fault state of an incoming line; and if the voltage of the first section and the second section of the bus is qualified and no incoming line fault exists, controlling the interconnection fast switching device to charge, and executing corresponding switching logic based on the switching state after charging is completed. By means of the mode, an auxiliary power interconnection function is added between the first machine and the second machine, so that the load after shutdown is changed to be interconnected and strung by another operation unit, and the requirements for saving production and operation cost and auxiliary power interconnection can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method and device for optimizing quick switching of power supply interconnection between power plants. Background Art

[0002] #1 and #2 units each have two sections of plant busbars. Originally, each unit was equipped with two quick-cut devices, which controlled the working and standby switches respectively. The working power comes from the unit, and the standby power comes from the starting and standby transformers. When the unit is shut down, the load after the unit is shut down is carried by the starting and standby transformers. The current solution cannot meet the requirements of saving production and operation costs and plant power interconnection.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a method and device for optimizing the quick switching of plant power interconnection, aiming to solve the technical problem that the current solution cannot meet the requirements of saving production and operation costs and plant power interconnection.

[0005] To achieve the above object, the present invention provides a method for optimizing the quick switching of power supply interconnection between power plants, and the method comprises the following steps:

[0006] Acquire the switch status during normal operation, wherein the switch status includes the 1DL switch status, the 2DL switch status, and the bus switch status;

[0007] After the interconnection quick-cut device is powered on, the voltage of busbars 1 and 2 and the fault status of incoming lines are detected;

[0008] If the bus voltages of sections 1 and 2 are qualified and there is no incoming line fault, the interconnected quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch state.

[0009] In some embodiments, the switch state is 1DL closed, 2DL open, and the bus switch open, or 1DL open, 2DL closed, and the bus switch open, or 1DL open, 2DL open, and the bus switch closed.

[0010] In some embodiments, executing corresponding switching logic based on the switch state includes:

[0011] If 1DL is in the closed position, 2DL is in the open position, and the bus switch is in the open position, and the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous closing bus tie switch is connected in parallel, and 1DL is tripped after the synchronous closing bus tie switch completes the parallel connection.

[0012] In some embodiments, executing corresponding switching logic based on the switch state includes:

[0013] If 1DL is open, 2DL is closed, and the bus switch is open, and the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous bus tie switch is connected in parallel, and 2DL is tripped after the synchronous bus tie switch completes the parallel connection.

[0014] In some embodiments, executing corresponding switching logic based on the switch state includes:

[0015] If 1DL is open, 2DL is open and the bus switch is closed, determine the corresponding mode selection;

[0016] Based on the mode selection, corresponding switching logic is executed.

[0017] In some embodiments, the executing corresponding switching logic based on the mode selection includes:

[0018] When the first mode is selected as closed and the second mode is selected as open, incoming line 1 is used as the main working incoming line, and when the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous closing 1DL is connected in parallel, and the bus tie switch is tripped after the synchronous closing bus tie switch completes the parallel connection.

[0019] In some embodiments, the executing corresponding switching logic based on the mode selection includes:

[0020] When the second mode is selected as closed and the first mode is selected as open, incoming line 2 is used as the main working incoming line, and when the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous closing 2DL is connected in parallel, and the bus tie switch is tripped after the synchronous closing bus tie switch completes the parallel connection.

[0021] In addition, in order to achieve the above-mentioned purpose, the present invention also proposes a plant power interconnection quick-cut optimization device, the plant power interconnection quick-cut optimization device comprising:

[0022] An acquisition module, used to acquire the switch status during normal operation, wherein the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status;

[0023] A detection module is used to detect the voltage of busbars 1 and 2 and the fault status of incoming lines after the interconnection quick-cut device is powered on;

[0024] The control module is used to control the interconnection quick-cut device to charge if the bus voltages of section 1 and section 2 are qualified and there is no incoming line fault, and after charging is completed, execute the corresponding switching logic based on the switch state.

[0025] In some embodiments, the switch state is 1DL closed, 2DL open, and the bus switch open, or 1DL open, 2DL closed, and the bus switch open, or 1DL open, 2DL open, and the bus switch closed.

[0026] In some embodiments, the control module is used to control the interconnection quick-cut device to start the manual switching function if 1DL is in the closed position, 2DL is in the open position, and the bus switch is in the open position, and the bus voltage is qualified, and when the manual switching signal is detected, the synchronous closing bus tie switch is connected in parallel, and 1DL is tripped after the synchronous closing bus tie switch completes the parallel connection.

[0027] In the present invention, the switch status during normal operation is obtained, and the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status; after the interconnection quick-cut device is powered on, the bus voltages of section 1 and section 2 and the incoming line fault status are detected; if the bus voltages of section 1 and section 2 are qualified and there is no incoming line fault, the interconnection quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch status. In the above manner, the plant power interconnection function is added between the #1 unit and the #2 unit, so that the load after the shutdown is replaced by another operating unit interconnection series, which can meet the requirements of saving production and operation costs and plant power interconnection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of the first embodiment of the optimization method for quick switching of power supply interconnection between power plants of the present invention;

[0029] Figure 2 It is a schematic diagram of a newly added plant power interconnection quick cut 1 in the plant power interconnection quick cut optimization method of the present invention;

[0030] Figure 3 It is a schematic diagram of a newly added plant power interconnection quick cut 2 in the plant power interconnection quick cut optimization method of the present invention;

[0031] Figure 4 The dimensions and opening diagram of the quick-cut device in the quick-cut optimization method for power supply interconnection in the present invention;

[0032] Figure 5 It is a schematic diagram of main wiring in the optimization method for quick switching of power supply interconnection in the plant of the present invention;

[0033] Figure 6 It is a schematic diagram of main wiring in the optimization method for quick switching of power supply interconnection in the plant of the present invention;

[0034] Figure 7 This is a structural block diagram of the first embodiment of the plant power interconnection quick-cut optimization device of the present invention.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0037] The embodiment of the present invention provides a method for optimizing the quick switching of power supply interconnection between power plants, referring to Figure 1 , Figure 1 It is a flow chart of a first embodiment of a method for optimizing quick switching of power supply interconnection between power plants of the present invention.

[0038] In this embodiment, the plant power interconnection quick switching optimization method includes the following steps:

[0039] Step S10: Acquire the switch status during normal operation, where the switch status includes the 1DL switch status, the 2DL switch status, and the bus switch status.

[0040] In this embodiment, the executor of this embodiment is a plant power interconnection quick-cut optimization device, wherein the plant power interconnection quick-cut optimization device has functions such as data processing, data communication and program running. The plant power interconnection quick-cut optimization device can be a computer terminal device or other network device, and of course it can also be other devices with similar functions, and this embodiment does not limit this.

[0041] It should be noted that #1 and #2 units each have two sections of plant busbars. Originally, each unit was equipped with two quick-cut devices, which controlled the working and standby switches respectively. The working power comes from the unit, and the standby power comes from the starting and standby transformers. When the unit is shut down, the post-shutdown load of the unit is carried by the starting and standby transformers. The current solution cannot meet the requirements of saving production and operation costs and plant power interconnection.

[0042] In order to solve the above technical problems, in this embodiment, the switch status during normal operation is obtained, and the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status; after the interconnection quick-cut device is powered on, the bus voltages of section 1 and section 2 and the incoming line fault status are detected; if the bus voltages of section 1 and section 2 are qualified and there is no incoming line fault, the interconnection quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch status. In the above manner, the plant power interconnection function is added between the #1 unit and the #2 unit, so that the load after the shutdown is replaced by another operating unit interconnection series, which can meet the requirements of saving production and operation costs and plant power interconnection. Specifically, it can be achieved in the following way.

[0043] In this embodiment, a plant power interconnection quick-cut device is added on the basis of the original structure, which is used for the plant power interconnection switching of 1A-2A and 2A-2B busbars respectively. The newly added quick-cut only realizes the manual switching function and is usually in a locked state. The newly added plant power interconnection quick-cut 1 and 2 can refer to Figure 2 and Figure 3 As shown in the figure, take interconnection fast switching 1 as an example to explain the operation mode as follows: Figure 2 As shown, in normal operation, the 4DL switch of the tie switch between the 6kV1A bus and the 2A bus is always closed, and the 3DL switch is in the open position. If the #1 unit is scheduled to shut down, the 2DL switch is closed and the 1DL switch is tripped by the manual switching function of the original 1A quick cut, and the power supply during the shutdown of the 1A bus is provided by the start-up transformer. After the unit stops, the 3DL switch is closed and the 2DL switch is tripped by the manual switching function of the newly added interconnection quick cut 1 device, and the load power supply on the 1A bus is changed to be provided by the 2A bus interconnection. If the #1 unit is scheduled to start, the 2DL (1A bus) switch is closed and the 3DL switch is tripped by the manual switching function of the newly added interconnection quick cut 1 device, and the power supply during the startup of the 1A bus is provided by the start-up transformer. After the #1 unit is started and connected to the grid, the 1DL switch is closed and the 2DL switch is tripped by the manual switching function of the original 1A quick cut. During normal operation, the 1A bus is powered by the #1 unit itself, and the start-up transformer becomes the standby power supply. During normal operation, the interconnection quick cut 1 device is placed in a locked state. If the #2 unit is scheduled to shut down, the manual switching function of the original 2A quick-cut will first close the 2DL (2A bus) switch and then open the 1DL (2A bus) switch. The power supply during the shutdown of the 2A bus will be provided by the start-up transformer. After the unit stops, the manual switching function of the newly added interconnection quick-cut 1 device will close the 3DL switch and then open the 2DL switch. The load power supply on the 2A bus will be provided by the 1A bus interconnection. If the #2 unit is scheduled to start, the manual switching function of the newly added interconnection quick-cut 1 device will first close the 2DL (2A bus) switch and then open the 3DL switch. The power supply during the startup of the 2A bus will be provided by the start-up transformer. After the #2 unit is started and connected to the grid, the 1DL switch will be closed and then the 2DL switch will be opened through the original 2A quick-cut manual switching function. During normal operation, the 2A bus is powered by the #2 unit itself, and the start-up transformer becomes the standby power supply. During normal operation, the interconnection quick-cut 1 device is placed in a locked state. Figure 3 The switching principle of the interconnected quick-cut device 2 shown is the same as above, and will not be repeated here. Figure 4As shown, the newly added fast-cut device is planned to be installed in a separate panel group, two fast-cut devices form a panel, and the panel cabinet is installed in the relay protection room. The wiring instructions of the device are as follows: the AC quantities that need to be connected are: working incoming line voltage Uab (or Ua); standby incoming line voltage Uab (or Ua); 1-section bus three-phase voltage Ua1, Ub1, Uc1; 2-section bus three-phase voltage Ua1, Ub1, Uc1; working incoming line three-phase current Ia1, Ib1, Ic1 (optional); standby incoming line three-phase current Ia2, Ib2, Ic2 (optional). The input quantities that need to be connected are mainly: switch position signal; manual locking signal; manual switching input; remote reset; the output quantities that need to be connected are mainly: opening and closing control signal; device signals to the background: switching completed, switching failed, device locked, TV disconnection, switch position abnormality, device fault alarm, device power failure alarm, general alarm and other signals (connect according to actual needs).

[0044] In the specific implementation, the switch status is 1DL closed, 2DL open and the bus switch open, or 1DL open, 2DL closed and the bus switch open, or 1DL open, 2DL open and the bus switch closed. In normal operation, 1DL (2DL) is closed, incoming line 1 supplies power to section 1 bus, and 2DL (1DL) and the bus tie switch are open.

[0045] Step S20: After the interconnection fast-cutting device is powered on, the voltage of the busbars of sections 1 and 2 and the fault status of the incoming line are detected.

[0046] Specifically, after the device is powered on, the voltage of bus sections 1 and 2 is qualified, and there is no incoming line fault. The device starts charging, and the charging is completed after 1 second. The system begins to enter the manual switching monitoring state.

[0047] Step S30: If the bus voltages of sections 1 and 2 are qualified and there is no incoming line fault, the interconnection quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch state. The dedicated scheme for executing the switching logic, such as bus tie replacement control (dark standby) or incoming line replacement control (bright standby), can be referred to the main wiring diagrams corresponding to each. Figure 5 and Figure 6 shown.

[0048] In a specific implementation, different switching logics will be executed in this embodiment for the above-mentioned different switch states. When 1DL is open, 2DL is closed, and the bus switch is open, and the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the bus tie switch is closed in parallel, and 2DL is tripped after the bus tie switch is closed in parallel. When 1DL is open, 2DL is closed, and the bus switch is open, and the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the bus tie switch is closed in parallel, and 2DL is tripped after the bus tie switch is closed in parallel.

[0049] Furthermore, for the cases of 1DL open position, 2DL open position and bus switch closed position, the corresponding mode selection needs to be determined in this embodiment. Specifically, the mode selection includes mode selection 1 and mode selection 2.

[0050] When the first mode is selected as the closed position and the second mode is selected as the open position, the incoming line 1 is used as the main working incoming line, and when the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the 1DL is connected in parallel, and the bus tie switch is tripped after the synchronous bus tie switch is completed in parallel. When the second mode is selected as the closed position and the first mode is selected as the open position, the incoming line 2 is used as the main working incoming line, and when the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the 2DL is connected in parallel, and the bus tie switch is tripped after the synchronous bus tie switch is completed in parallel.

[0051] Furthermore, when both mode selection 1 and mode selection 2 are in the open position or in the closed position, the device blocks the manual switching function. After the manual switching is successful, the device returns to the normal operation mode. It should be emphasized that the soft pressure plate of the abnormal working condition switching and accident switching functions is exited by default, and the standby automatic switching function is locked.

[0052] In this embodiment, the switch status during normal operation is obtained, and the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status; after the interconnection quick-cut device is powered on, the bus voltages of section 1 and section 2 and the incoming line fault status are detected; if the bus voltages of section 1 and section 2 are qualified and there is no incoming line fault, the interconnection quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch status. In the above manner, the plant power interconnection function is added between the #1 unit and the #2 unit, so that the load after the shutdown is connected to another operating unit in series, which can meet the requirements of saving production and operation costs and plant power interconnection.

[0053] Reference Figure 7 , Figure 7 This is a structural block diagram of the first embodiment of the plant power interconnection quick-cut optimization device of the present invention.

[0054] like Figure 7 As shown, the plant power interconnection quick switching optimization device proposed in the embodiment of the present invention includes:

[0055] An acquisition module 10 is used to acquire the switch status during normal operation, wherein the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status;

[0056] The detection module 20 is used to detect the voltage of the busbars of sections 1 and 2 and the fault status of the incoming line after the interconnection fast-cutting device is powered on;

[0057] The control module 30 is used to control the interconnection quick-cut device to charge if the voltage of the busbars in sections 1 and 2 is qualified and there is no incoming line fault, and after the charging is completed, execute the corresponding switching logic based on the switch state.

[0058] In this embodiment, the switch status during normal operation is obtained, and the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status; after the interconnection quick-cut device is powered on, the bus voltages of section 1 and section 2 and the incoming line fault status are detected; if the bus voltages of section 1 and section 2 are qualified and there is no incoming line fault, the interconnection quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch status. In the above manner, the plant power interconnection function is added between the #1 unit and the #2 unit, so that the load after the shutdown is connected to another operating unit in series, which can meet the requirements of saving production and operation costs and plant power interconnection.

[0059] In some embodiments, the switch state is 1DL closed, 2DL open, and the bus switch open, or 1DL open, 2DL closed, and the bus switch open, or 1DL open, 2DL open, and the bus switch closed.

[0060] In some embodiments, the control module 30 is used to control the interconnection quick-cut device to start the manual switching function if 1DL is in the closed position, 2DL is in the open position, and the bus switch is in the open position, and the bus voltage is qualified, and when the manual switching signal is detected, the synchronous closing bus tie switch is connected in parallel, and 1DL is tripped after the synchronous closing bus tie switch completes the parallel connection.

[0061] In some embodiments, the control module 30 is used to control the interconnection quick-cut device to start the manual switching function if 1DL is open, 2DL is closed, and the bus switch is open, and the bus voltage is qualified, and when a manual switching signal is detected, the bus tie switch is closed in parallel, and 2DL is tripped after the bus tie switch is closed in parallel.

[0062] In some embodiments, the control module 30 is used to determine the corresponding mode selection if 1DL is open, 2DL is open, and the bus switch is closed;

[0063] Based on the mode selection, corresponding switching logic is executed.

[0064] In some embodiments, the control module 30 is used to use the incoming line 1 as the main working incoming line when the first mode is selected as the closed position and the second mode is selected as the open position, and when the bus voltage is qualified, control the interconnection quick-cut device to start the manual switching function, and when the manual switching signal is detected, parallel synchronous closing 1DL, and trip the bus tie switch after the synchronous closing bus tie switch completes the parallel connection.

[0065] In some embodiments, the control module 30 is used to use the incoming line 2 as the main working incoming line when the second mode is selected as the closed position and the first mode is selected as the open position, and when the bus voltage is qualified, control the interconnection quick-cut device to start the manual switching function, and when the manual switching signal is detected, parallel synchronous closing 2DL, and trip the bus tie switch after the synchronous closing bus tie switch completes the parallel connection.

[0066] An embodiment of the present application also provides a plant power interconnection quick-cut optimization device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus, and the memory is used to store a plant power interconnection quick-cut optimization program; the processor is used to implement the above-mentioned plant power interconnection quick-cut optimization method when executing the program stored in the memory.

[0067] The communication bus mentioned in the above-mentioned plant power interconnection fast-cut optimization device can be a peripheral component interconnect standard (English: Peripheral Component Interconnect, referred to as: PCI) bus or an extended industry standard architecture (English: Extended Industry Standard Architecture, referred to as: EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0068] The communication interface is used for communication between the above-mentioned plant power interconnection quick-cut optimization equipment and other equipment.

[0069] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0070] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components.

[0071] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0073] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0075] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0076] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0077] In addition, for technical details not fully described in this embodiment, please refer to the fast-cut optimization method for plant power interconnection provided in any embodiment of the present invention, and will not be repeated here.

[0078] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0079] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0080] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0081] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0082] It is understandable that the system provided by the embodiment of the present invention corresponds to the method provided by the embodiment of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts in the above method.

Claims

1. A method for optimizing the quick switching of power supply interconnection between power plants, characterized in that: The plant power interconnection quick switching optimization method comprises: Acquire the switch status during normal operation, wherein the switch status includes the 1DL switch status, the 2DL switch status, and the bus switch status; After the interconnection quick-cut device is powered on, the voltage of busbars 1 and 2 and the fault status of incoming lines are detected; If the bus voltages of sections 1 and 2 are qualified and there is no incoming line fault, the interconnected quick-cut device is controlled to charge, and after the charging is completed, the corresponding switching logic is executed based on the switch state.

2. The fast switching optimization method for power supply interconnection in plant as claimed in claim 1, characterized in that: The switch status is 1DL closed, 2DL open and bus switch open, or 1DL open, 2DL closed and bus switch open, or 1DL open, 2DL open and bus switch closed.

3. The fast switching optimization method for power supply interconnection in plant as claimed in claim 2, characterized in that: The executing corresponding switching logic based on the switch state includes: If 1DL is in the closed position, 2DL is in the open position, and the bus switch is in the open position, and the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous closing bus tie switch is connected in parallel, and 1DL is tripped after the synchronous closing bus tie switch completes the parallel connection.

4. The fast switching optimization method for power supply interconnection in plant as claimed in claim 2, characterized in that: The executing corresponding switching logic based on the switch state includes: If 1DL is open, 2DL is closed, and the bus switch is open, and the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous bus tie switch is connected in parallel, and 2DL is tripped after the synchronous bus tie switch completes the parallel connection.

5. The fast switching optimization method for power supply interconnection in plant as claimed in claim 2, characterized in that: The executing corresponding switching logic based on the switch state includes: If 1DL is open, 2DL is open and the bus switch is closed, determine the corresponding mode selection; Based on the mode selection, corresponding switching logic is executed.

6. The fast switching optimization method for power supply interconnection in plant as claimed in claim 5, characterized in that: The executing corresponding switching logic based on the mode selection includes: When the first mode is selected as closed and the second mode is selected as open, incoming line 1 is used as the main working incoming line, and when the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous closing 1DL is connected in parallel, and the bus tie switch is tripped after the synchronous closing bus tie switch completes the parallel connection.

7. The fast switching optimization method for power supply interconnection in plant as claimed in claim 5, characterized in that: The executing corresponding switching logic based on the mode selection includes: When the second mode is selected as closed and the first mode is selected as open, incoming line 2 is used as the main working incoming line, and when the bus voltage is qualified, the interconnection quick-cut device is controlled to start the manual switching function, and when the manual switching signal is detected, the synchronous closing 2DL is connected in parallel, and the bus tie switch is tripped after the synchronous closing bus tie switch completes the parallel connection.

8. A plant power interconnection quick cut optimization device, characterized in that: The plant power interconnection quick-cut optimization device comprises: An acquisition module, used to acquire the switch status during normal operation, wherein the switch status includes the 1DL switch status, the 2DL switch status and the bus switch status; A detection module is used to detect the voltage of busbars 1 and 2 and the fault status of incoming lines after the interconnection quick-cut device is powered on; The control module is used to control the interconnection quick-cut device to charge if the bus voltages of section 1 and section 2 are qualified and there is no incoming line fault, and after charging is completed, execute the corresponding switching logic based on the switch state.

9. The fast-cut optimization device for power supply interconnection in the plant as claimed in claim 8, characterized in that: The switch status is 1DL closed, 2DL open and bus switch open, or 1DL open, 2DL closed and bus switch open, or 1DL open, 2DL open and bus switch closed.

10. The fast switching optimization device for power supply interconnection in the plant as claimed in claim 9, characterized in that: The control module is used to control the interconnection quick-cut device to start the manual switching function if 1DL is in the closed position, 2DL is in the open position, and the bus switch is in the open position, and the bus voltage is qualified, and when the manual switching signal is detected, the synchronous closing bus tie switch is connected in parallel, and 1DL is tripped after the synchronous closing bus tie switch completes the parallel connection.

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