Machine transformer unit working condition simulation device and system
By designing a machine-changing unit working condition simulation device, using display components and logic computing modules to realize working condition simulation, the problems of low efficiency and poor safety in the prior art are solved, and efficient and safe protection verification are achieved.
Patent Information
- Application Number
- CN202421378871.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The operating conditions simulation method of the motor-transformation protection device in the prior art is inefficient, which can easily lead to equipment damage and personal electric shock risks, and frequent wiring disassembly and inconvenient operation.
Design a computer-change unit working condition simulation device, including display components, main processor, relay components, analog signal output port, protection signal input port and protection verification module, and realize working condition simulation through logic operations and signal conversion modules to avoid frequent shorting of signals.
It improves the working efficiency of working condition simulation and protection verification, reduces the risk of equipment damage and personal electric shock, and improves safety.
Smart Images
Figure CN223065405U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power electronics, and particularly to a simulation device and system for the working conditions of a generator-transformer unit. Background Art
[0002] The protection device of the generator-transformer unit in a power plant is one of the key protection devices in the power system, and its main function is to protect the safe operation of power equipment such as generator sets and transformers. The protection of the generator-transformer unit can also start the protection blocking function through different unit operating conditions to achieve the protection of main equipment such as generator sets and transformers under different operating modes. Under each operating condition, some protection functions are not applicable and may cause misoperation. Therefore, it is necessary to set up a perfect protection function blocking, specifically the blocking relationship between the protection function and the operating condition.
[0003] In the calibration work of the generator-transformer unit protection device, the switches and disconnectors of the generator-transformer unit are usually in the overhaul state and cannot cooperate with the protection calibration work under various conditions. In actual overhaul work, the simulation of the working conditions is usually achieved by short-circuiting the position contacts of the switches and disconnectors in the protection panel cabinet. However, the existing method has the following problems: during the short-circuiting process, it is necessary to carefully check the signal wiring, and frequent disconnection and connection of wires are required for different protection conditions, resulting in low efficiency of the protection calibration work; there is limited space in the protection panel cabinet, and frequent disconnection and connection of wires are likely to cause errors in disconnection and connection, leading to safety incidents such as damage to equipment or mis-tripping of operating equipment; there are live terminals among the short-circuited signal terminals and they are close to other live equipment in the cabinet, which is prone to electric shock to personnel; according to operation and maintenance experience, the terminals with frequent disconnection and connection are easily damaged and need to be replaced regularly. If not replaced in time, it will cause equipment incidents.
[0004] Therefore, it is urgent to invent a simulation device for the working conditions of a generator-transformer unit to improve the working efficiency and safety of working condition simulation and protection calibration. Summary of the Invention
[0005] In view of this, the embodiments of the present utility model provide a simulation device and system for the working conditions of a generator-transformer unit, which at least partially solve the problems existing in the prior art.
[0006] Other characteristics and advantages of the present utility model will become obvious through the following detailed description, or be learned partially through the practice of the present utility model.
[0007] In order to achieve the above object, the embodiments of the present utility model provide the following technical solutions:
[0008] According to the first aspect of the embodiments of the present utility model, a simulation device for the working conditions of a generator-transformer unit is provided, which is used to calibrate the protection device of the generator-transformer unit to be measured. The simulation device for the working conditions of the generator-transformer unit includes: a display element, a main processor, a relay assembly, a simulated signal output port, a protection signal input port, and a protection calibration module;
[0009] The display element is connected to the main processor, and the display element is used to send an analog working condition type signal to the main processor;
[0010] The main processor is connected to the relay assembly, and the main processor is used to control the relay assembly to generate a working condition simulation signal according to the analog working condition type signal;
[0011] The relay assembly is connected to the analog signal output port, and the analog signal output port is used to send the received working condition simulation signal to the protection device of the machine-transformer unit under test;
[0012] The protection signal input port is connected to the protection verification module, and the protection signal input port is used to receive the protection action signal generated by the protection device of the machine-transformer unit under test and send the protection action signal to the protection verification module;
[0013] The protection verification module is connected to the main processor, and the protection verification module is used to convert the protection action signal into a to-be-verified working condition signal and send the to-be-verified working condition signal to the main processor.
[0014] Further, the protection verification module includes: a protection signal input module, a acquisition interface module, an ARM processor, a FIFO channel, an FPGA logic operation array, and a to-be-verified working condition signal output module;
[0015] One end of the protection signal input module is connected to the protection signal input port, and the other end is connected to the acquisition interface module. The protection signal input module is used to transmit the received protection action signal to the acquisition interface module;
[0016] The acquisition interface module is connected to the ARM processor through a bus, and the acquisition interface module is used to transmit the protection action signal to the ARM processor;
[0017] The ARM processor is connected to the input end of the FPGA logic operation array through the FIFO channel. The FPGA logic operation array is used to perform logical operations according to the mapping relationship of the protection action signal to obtain the corresponding to-be-verified working condition signal;
[0018] The output end of the FPGA logic operation array is connected to the acquisition interface module, and the FPGA logic operation array is used to output the to-be-verified working condition signal to the acquisition interface module;
[0019] The acquisition interface module is connected to the to-be-verified working condition signal output module, and the acquisition interface module is also used to transmit the to-be-verified working condition signal to the to-be-verified working condition signal output module;
[0020] The to-be-verified working condition signal output module is connected to the main processor, and is used to transmit the to-be-verified working condition signal to the main processor.
[0021] Further, an aviation plug is externally connected to the analog signal output port.
[0022] Further, the protection verification module further includes: a digital-to-analog conversion module;
[0023] The digital-to-analog conversion module is connected to the FIFO channel, and is used to implement the conversion between analog signals and digital signals.
[0024] Further, a digital-to-analog decoding control module is provided between the digital-to-analog conversion module and the FIFO channel, and is used to implement data interaction between the FIFO channel and the digital-to-analog conversion module.
[0025] Further, the protection verification module further includes: an interrupt control module;
[0026] The interrupt control module is connected to the ARM processor, and is used to perform program interrupt control when an error occurs in the ARM processor.
[0027] Further, a read / write register is provided in the acquisition interface module.
[0028] Further, the protection verification module further includes: a timing module;
[0029] The timing module is connected to the acquisition interface module.
[0030] Further, the unit-transformer unit working condition simulation device is a pumped-storage power station unit-transformer unit working condition simulation device, the protection signal input module adopts a 32-channel protection signal input module, and the to-be-verified working condition signal output module adopts an 8-channel to-be-verified working condition signal output module.
[0031] According to the second aspect of the embodiments of the present invention, a unit-transformer unit working condition simulation system is provided, and the system includes: the unit-transformer unit working condition simulation device as described in any one of the above, and a unit-transformer protection device to be measured;
[0032] The analog signal output port of the unit-transformer unit working condition simulation device is connected to the unit-transformer protection device to be measured; the protection signal input port of the unit-transformer unit working condition simulation device is connected to the unit-transformer protection device to be measured.
[0033] The present invention has the following advantages:
[0034] A kind of machine-variable unit working condition simulation device and system disclosed by the utility model effectively avoids short-circuiting signals multiple times under different protections and different working condition verifications, greatly reduces the frequency of wire checking and wiring disconnection and connection by maintenance personnel, greatly improves the working efficiency of working condition simulation and protection verification, and at the same time effectively reduces the risks of equipment damage and personal electric shock during the protection verification operation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.
[0036] Figure 1 It is a schematic structural diagram of a machine-variable unit working condition simulation device provided by an embodiment of the present utility model;
[0037] Figure 2 It is a schematic structural diagram of a protection verification module provided by an embodiment of the present utility model;
[0038] Figure 3 It is a schematic logical structure diagram of a machine-variable unit working condition simulation system provided by an embodiment of the present utility model.
[0039] REFERENCE NUMERALS:
[0040] 1 - Display element; 2 - Main processor; 3 - Relay assembly;
[0041] 4 - Analog signal output port; 5 - Protection signal input port; 6 - Protection verification module;
[0042] 601 - Protection signal input module; 602 - Acquisition interface module; 603 - ARM processor;
[0043] 604 - FIFO channel; 605 - FPGA logic operation array;
[0044] 606 - Working condition signal to be verified output module; 607 - Digital-to-analog conversion module;
[0045] 608 - Digital-to-analog decoding control module; 609 - Interrupt control module; 610 - Time synchronization module. DETAILED IMPLEMENTATION MANNER
[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in a variety of different configurations.
[0047] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0048] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.
[0049] In the description of the present utility model, it should be noted that the nouns indicating orientation or positional relationship in the content of this specification are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0050] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0051] Referring to Figure 1 , an embodiment of the present utility model provides a machine-variable unit condition simulation device for verifying a protection device of a measured machine-variable unit. The machine-variable unit condition simulation device specifically includes: a display element 1, a main processor 2, a relay assembly 3, a simulated signal output port 4, a protection signal input port 5, and a protection verification module 6.
[0052] The display component 1 is connected to the main processor 2. The display component 1 provides a list of simulated working conditions for the user to select. The user selects the type of simulated working condition, and the display component 1 sends the corresponding simulated working condition type signal to the main processor 2. The operating states of each knife switch and switch corresponding to the simulated working condition type are displayed on the display component 1, and the display component 1 can be a touch screen.
[0053] The main processor 2 is connected to the relay assembly 3. After receiving the simulated working condition type signal sent by the display component 1, the main processor 2 uses the control unit to control the relay assembly 3 to simulate the actions of the actual switches and knife switches of the generator-transformer unit by opening and closing the internal relays according to the simulated working condition type signal, and generates a working condition simulation signal.
[0054] The relay assembly 3 is connected to the analog signal output port 4, and transmits the simulated simulated working condition signal to the analog signal output port 4.
[0055] The analog signal output port 4 transmits the simulated working condition signal to the protected generator-transformer unit through an aviation plug. The protected generator-transformer unit identifies the operating condition of the generator-transformer unit by discriminating the position signals such as switches and knife switches of the working condition simulation signal. According to the operating condition of the generator-transformer unit, the protected generator-transformer unit selects to block relevant protections. After the protected device completes the protection action, it transmits the corresponding protection action information to the protection signal input port 5, and the protection signal input port 5 is also connected to the protection verification module 6 inside the simulation device, and sends the received protection action signal generated by the protected generator-transformer unit to the protection verification module 6.
[0056] Combined Figure 2 As shown, the protection verification module 6 specifically includes: a protection signal input module 601, a acquisition interface module 602, an ARM processor 603, a FIFO channel 604, an FPGA logic operation array 605, and a to-be-verified working condition signal output module 606.
[0057] Specifically, the outer end of the protection signal input module 601 is connected to the protection signal input port 5, and is used to receive the protection action signal sent by the protected generator-transformer unit, and the inner end is connected to the acquisition interface module 602, and is used to transmit the received protection action signal to the acquisition interface module 602.
[0058] The above acquisition interface module 602 is connected to the ARM processor 603 through a bus, and transmits the acquired protection action signal data to the ARM processor 603 through the data and address buses. Among them, the above ARM processor 603 is a 32-bit reduced instruction set (RISC) processor, which is widely used in many embedded system designs. The ARM processor has the characteristics of fixed instruction length, high execution efficiency, and low cost.
[0059] The above acquisition interface module 602 is also connected to a time synchronization module 610.
[0060] The ARM processor 603 is further connected to the input end of the FPGA logic operation array 605 through the FIFO channel 604. Among them, the above FIFO channel 604 is a First Input First Output channel. Due to the rapid development of microelectronics technology, the capacity of the new generation of FIFO chips is getting larger and larger, the volume is getting smaller and smaller, and the price is getting cheaper. As a new type of large-scale integrated circuit, FIFO chips are gradually more widely used in high-speed data acquisition, high-speed data processing, high-speed data transmission, and multi-processor systems due to their flexible, convenient, and efficient characteristics.
[0061] During operation, the stop control in case of errors needs to be considered. Therefore, an interrupt control for the ARM processor is added in the FPGA design. The above ARM processor 603 is also connected to an interrupt control module 609, which is used for program interrupt control when an error occurs.
[0062] The above FIFO channel 604 is also connected to an analog-to-digital conversion module 607, and the above analog-to-digital conversion module 607 is used to realize the conversion between analog signals and digital signals; an analog-to-digital decoding control module 608 is also provided between the analog-to-digital conversion module 607 and the FIFO channel 604, and the above analog-to-digital decoding control module 608 is used to realize data interaction between the FIFO channel 604 and the analog-to-digital conversion module 607.
[0063] The FPGA logic operation array 605 is used to perform logical operations according to the mapping relationship of the protection action signals to obtain the corresponding working condition signals to be verified. Among them, the above mapping relationship includes: the mapping logical relationship between the protection action signals and the switch, disconnector, and monitoring input position signals, and the mapping logical relationship between the switch, disconnector, and monitoring input position signals and the working condition signals to be verified. The above working condition signals to be verified are divided into two types: normal working conditions and abnormal working conditions.
[0064] It should be noted that the above FPGA logic operation array 605 is a Field-Programmable Gate Array. The field programmable gate array is a further developed product based on other programmable devices. It appears as a semi-custom circuit in the field of Application-Specific Integrated Circuits (ASICs), which not only solves the deficiencies of custom circuits but also overcomes the shortcomings of the limited number of gate circuits in the original programmable devices.
[0065] The output end of the FPGA logic operation array 605 is connected to the acquisition interface module 602, and the working condition signals to be verified obtained by logical operations are output to the acquisition interface module 602.
[0066] The above-mentioned acquisition interface module 602 is connected to one end of the signal output module 606 of the working condition to be verified, and is used to transmit the received signal of the working condition to be verified to the signal output module 606 of the working condition to be verified.
[0067] The other end of the signal output module 606 of the working condition to be verified is connected to the main processor 2, and the signal of the working condition to be verified is transmitted to the main processor 2.
[0068] The main processor 2 is used to receive the signal of the working condition to be verified transmitted by the signal output module 606 of the protection verification module 6, and generate a protection verification result according to the signal of the working condition to be verified.
[0069] Corresponding to the above-mentioned disclosed simulation device for the working conditions of the generator-transformer unit, the embodiment of the present invention also discloses a simulation device for the working conditions of the generator-transformer unit of the pumped-storage power station.
[0070] The pumped-storage unit corresponding to the above-mentioned pumped-storage power station generator-transformer unit working condition simulation device has both basic working modes of a water pump and a water turbine. The operating conditions of the pumped-storage power station unit include: power generation operating condition, power generation phase modulation operating condition, pumping operating condition, pumping phase modulation operating condition, driving machine operating condition, driven machine operating condition, electric braking operating condition, and circuit breaker opening state (shutdown or power generation start-up, etc.), a total of 8 operating conditions.
[0071] The discrimination of the operating conditions of the pumped-storage power station generator-transformer unit is mainly realized by judging 12 kinds of input position signals such as switches, disconnectors, and monitoring input signals.
[0072] The protection actions corresponding to the pumped-storage power station generator-transformer unit include unit protection and main transformer protection. Among them, the unit protection includes a total of 21 kinds of protections such as generator differential protection, generator inter-turn protection, and generator negative pressure overcurrent protection; the main transformer protection includes a total of 8 protection actions such as main transformer differential protection and main transformer high-voltage side negative pressure overcurrent protection.
[0073] A mapping logic relationship is established between the 8 operating conditions of the pumped-storage power station generator-transformer unit and 12 kinds of input position signals, and a mapping logic relationship is established between the 12 kinds of input position signals of the pumped-storage power station generator-transformer unit and 29 kinds of protection actions.
[0074] Based on the established mapping logic relationship, in the simulation device for the working conditions of the pumped-storage power station generator-transformer unit, in combination with the characteristics of electronic components, the protection signal input module 601 is implemented by using a 32-channel protection signal input module (the states are divided into opening and closing). The above-mentioned 32-channel protection signal input module includes 21 kinds of protection signals of the unit, 8 kinds of protection signals of the main transformer, and 3 channels for standby; the signal output module 606 of the working condition to be verified uses an 8-channel signal output module of the working condition to be verified.
[0075] It should be noted that the above-mentioned mapping logic relationships all belong to the prior art.
[0076] Corresponding to a kind of variable machine set working condition simulation device disclosed above, an embodiment of the present utility model discloses a variable machine set working condition simulation system. Refer to Figure 3 , the above system includes: a kind of variable machine set working condition simulation device described in any one of the above, and a protected device of the variable machine set to be measured.
[0077] The simulation signal output port 4 of the above variable machine set working condition simulation device is connected to the protected device of the variable machine set to be measured; the protection signal input port 5 of the variable machine set working condition simulation device is connected to the protected device of the variable machine set to be measured.
[0078] The technical solution of the present utility model has the following advantages:
[0079] The variable machine set working condition simulation device and system provided by the embodiment of the present utility model effectively avoid short - circuiting signals multiple times under different protections and different working condition verifications, greatly reduce the frequency of wire checking and wiring disconnection and connection by maintenance personnel, greatly improve the working efficiency of working condition simulation and protection verification, and at the same time effectively reduce the risks of equipment damage and personal electric shock during the protection verification operation, and improve the safety during the working condition simulation and protection verification process.
[0080] The above - listed embodiments show and describe the basic principles and main features of the present utility model. However, the present utility model is not limited by the above embodiments. Modifications, equivalent changes and decorations made to the present utility model by those skilled in the art without creative efforts shall fall within the scope of protection of the technical solution of the present utility model.
Claims
1. A variable machine group working condition simulation device, characterized in that For verifying the protection device of the generator-transformer unit under test, the generator-transformer unit condition simulation device includes: a display element (1), a main processor (2), a relay assembly (3), an analog signal output port (4), a protection signal input port (5), and a protection verification module (6); The display element (1) is connected to the main processor (2), and the display element (1) is used to send the analog condition type signal to the main processor (2); The main processor (2) is connected to the relay assembly (3), and the main processor (2) is used to control the relay assembly (3) to generate a condition simulation signal according to the analog condition type signal; The relay assembly (3) is connected to the analog signal output port (4), and the analog signal output port (4) is used to send the received condition simulation signal to the protection device of the generator-transformer unit under test; The protection signal input port (5) is connected to the protection verification module (6), and the protection signal input port (5) is used to receive the protection action signal generated by the protection device of the generator-transformer unit under test and send the protection action signal to the protection verification module (6); The protection verification module (6) is connected to the main processor (2), and the protection verification module (6) is used to convert the protection action signal into a signal of the condition to be verified and send the signal of the condition to be verified to the main processor (2).
2. The variable mechanism group working condition simulation device according to claim 1, characterized in that, The protection verification module (6) includes: a protection signal input module (601), an acquisition interface module (602), an ARM processor (603), a FIFO channel (604), an FPGA logic operation array (605), and a signal output module (606) of the condition to be verified; One end of the protection signal input module (601) is connected to the protection signal input port (5), and the other end is connected to the acquisition interface module (602). The protection signal input module (601) is used to transmit the received protection action signal to the acquisition interface module (602); The acquisition interface module (602) is connected to the ARM processor (603) through a bus, and the acquisition interface module (602) is used to transmit the protection action signal to the ARM processor (603); The ARM processor (603) is connected to the input end of the FPGA logic operation array (605) through the FIFO channel (604). The FPGA logic operation array (605) is used to perform logical operations according to the mapping relationship of the protection action signal to obtain the corresponding signal of the condition to be verified; The output end of the FPGA logic operation array (605) is connected to the acquisition interface module (602), and the FPGA logic operation array (605) is used to output the signal of the condition to be verified to the acquisition interface module (602); The acquisition interface module (602) is connected to the signal output module (606) of the condition to be verified, and the acquisition interface module (602) is also used to transmit the signal of the condition to be verified to the signal output module (606) of the condition to be verified; The to-be-verified working condition signal output module (606) is connected to the main processor (2), and the to-be-verified working condition signal output module (606) is used to transmit the to-be-verified working condition signal to the main processor (2).
3. The variable mechanism group working condition simulation device according to claim 2, characterized in that, An aviation plug is externally connected to the analog signal output port (4).
4. The variable mechanism group working condition simulation device according to claim 2, characterized in that The protection verification module (6) further includes: a digital-to-analog conversion module (607); The digital-to-analog conversion module (607) is connected to the FIFO channel (604), and the digital-to-analog conversion module (607) is used to implement the conversion between analog signals and digital signals.
5. The variable mechanism group working condition simulation device according to claim 4, characterized in that A digital-to-analog decoding control module (608) is provided between the digital-to-analog conversion module (607) and the FIFO channel (604), and the digital-to-analog decoding control module (608) is used to implement data interaction between the FIFO channel (604) and the digital-to-analog conversion module (607).
6. The variable mechanism group working condition simulation device according to claim 2, wherein, The protection verification module (6) further includes: an interrupt control module (609); The interrupt control module (609) is connected to the ARM processor (603), and the interrupt control module (609) is used to perform program interrupt control when an error occurs in the ARM processor (603).
7. The variable mechanism group working condition simulation device according to claim 2, characterized in that Read / write registers are provided in the acquisition interface module (602).
8. The variable mechanism group working condition simulation device according to claim 2, characterized in that The protection verification module (6) further includes: a time synchronization module (610); The time synchronization module (610) is connected to the acquisition interface module (602).
9. The variable mechanism group working condition simulation device according to any one of claims 2 to 8, characterized in that The generator-transformer unit working condition simulation device is a generator-transformer unit working condition simulation device for a pumped storage power station. The protection signal input module (601) adopts a 32-channel protection signal input module, and the to-be-verified working condition signal output module (606) adopts an 8-channel to-be-verified working condition signal output module.
10. A variable machine group working condition simulation system, characterized in that, The system includes: the generator-transformer unit working condition simulation device according to any one of claims 1-9, and a generator-transformer unit protection device to be measured; The analog signal output port (4) of the generator-transformer unit working condition simulation device is connected to the generator-transformer unit protection device to be measured; the protection signal input port (5) of the generator-transformer unit working condition simulation device is connected to the generator-transformer unit protection device to be measured.