Portable control and protection function testing device of direct-current power transmission valve cooling system

Abstract

The utility model relates to a portable control and protection function testing device of a direct current power transmission valve cooling system, which comprises a suitcase and a testing mechanism assembled in the suitcase, and is characterized in that the testing mechanism comprises a central control circuit board, a touch screen and a universal testing fast-assembly connecting accessory; the touch screen is in two-way data connection with the main control module through the communication interface module, the output end of the main control module is connected with the AO channel module and the AI channel module, the general test fast-assembly connecting accessory is connected with the central control circuit board through the AO channel module and the AI channel module, and the power supply conversion module supplies power to all modules on the central control circuit board and the touch screen. The testing device can be connected with a control protection device of the valve cooling system, various operation conditions of the valve cooling system are simulated through user operation, real-time data are obtained, efficient verification of the control protection function of the valve cooling system is achieved, and meanwhile the difficulty of troubleshooting of an industrial field instrument loop and function testing before replacement of a spare part instrument is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of DC power transmission, and particularly relates to a portable control and protection function test device for a valve cooling system of a DC power transmission system. Background Technique

[0002] The development of DC power transmission is closely related to commutation technology, especially high-voltage and high-power commutation equipment. Therefore, DC power transmission is inseparable from commutation valves used to complete the rectification and inversion processes. As an important device in the DC power transmission system, a large amount of heat is generated when the main components of the commutation valve work. If not cooled, it will cause permanent damage to the components within a short time.

[0003] At present, the valve cooling system generally adopts a water cooling system. This system drives cooling water to carry the heat of the commutation valve outdoors for heat dissipation. In addition, the valve cooling control system can also independently issue a commutation valve tripping request. Therefore, the stable operation of the valve cooling system affects the reliability of the entire DC power transmission system. The valve cooling system mainly monitors the analog signals of transmitters or sensors to achieve equipment control to ensure the cooling effect. The system functions include the control of equipment such as electric heaters, three-way circuits, cooling fans, spray pumps, and external cooling makeup water. In addition, makeup water circuit equipment such as raw water pumps, makeup water pumps, on-off valves, and solenoid valves, as well as redundant air supply solenoid valves and exhaust solenoid valves, are also the main control objects of the valve cooling system. The valve cooling system automatically controls each component device according to the on-site instrument data acquisition volume. Under extreme conditions, when the analog signal of the transmitter or sensor exceeds the limit value, the valve cooling system will issue a signal requesting the commutation valve to trip, thereby shutting down the DC power transmission system of this line.

[0004] In the current annual overhaul or new project construction of converter stations, for the control and protection function logic test of the valve cooling system, it is necessary to rely on debuggers to manually externally connect a signal generator to simulate working conditions or modify the valve cooling setting values for testing. Due to the complex operation procedures and many involved working conditions, it will occupy a large amount of overhaul or debugging cycles. At the same time, when connecting the signal generator, due to the mismatch of cables or connectors, it is necessary to disassemble the cables of the original equipment. During the specific operation process, there may be hidden dangers of incorrect connection or missed connection, and even damage the analog channel board of the valve cooling control and protection system, thus affecting the control stability of the valve cooling system and seriously affecting the overhaul or debugging progress. In addition, the signal generator cannot simulate the complex working conditions of the valve cooling system, and it is difficult to verify complex logic functions. During the overhaul period, when modifying the setting parameters of the valve cooling system for testing, there is often a hidden danger of forgetting to restore the modified setting values before power-on, increasing the overhaul procedures and prolonging the overhaul cycle. Content of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the defects of the existing control and protection function logic test method of the valve cooling system, such as numerous working conditions, complex test operations, long debugging time and maintenance cycle, etc. A portable control and protection function test device for a DC transmission valve cooling system is provided, which can be connected to the control and protection device of the valve cooling system, simulate various operating conditions of the valve cooling system through user operations, and obtain real-time data, so as to realize the efficient verification of the control and protection functions of the valve cooling system, and at the same time reduce the difficulty of troubleshooting the instrument loop faults in the industrial field and the function test before replacing spare instruments.

[0006] The portable control and protection function test device for the DC transmission valve cooling system includes a carrying case and a test mechanism assembled in the carrying case. Among them, the test mechanism includes a central control circuit board, a touch screen, and a general test quick-connection attachment; the central control circuit board is serially connected to the touch screen, and the central control circuit board is integrated with a communication interface module, a main control module, an AO channel module, an AI channel module, and a power conversion module; the touch screen is bidirectionally connected to the main control module through the communication interface module, the output end of the main control module is connected to the AO channel module and the AI channel module, the general test quick-connection attachment is connected to the central control circuit board through the AO channel module and the AI channel module, and the power conversion module supplies power to each module on the central control circuit board and the touch screen.

[0007] Further, the general test quick-connection attachment includes a channel connection cable and a terminal connector.

[0008] Further, an electrical quick-connection interface is movably installed in the carrying case, and the electrical quick-connection interface is connected to the corresponding channel connection cable through the terminal connector.

[0009] Further, the central control circuit board, the touch screen, and the general test quick-connection attachment are fixed in the carrying case through fixing parts.

[0010] The portable control and protection function test device for a DC transmission valve cooling system of the present utility model overcomes the defects of the existing control and protection function logic test method of the valve cooling system, such as numerous working conditions, complex test operations, long debugging time and maintenance cycle, etc. It can be connected to the control and protection device of the valve cooling system, simulate various operating conditions of the valve cooling system through user operations, and obtain real-time data, so as to realize the efficient verification of the control and protection functions of the valve cooling system, and at the same time reduce the difficulty of troubleshooting the instrument loop faults in the industrial field and the function test before replacing spare instruments. Brief Description of the Drawings

[0011] The following further describes a portable control and protection function test device for a DC transmission valve cooling system of the present utility model with reference to the accompanying drawings:

[0012] Figure 1It is a schematic structural diagram of a portable control and protection function test device for the DC transmission valve cooling system of the present invention;

[0013] Figure 2 It is a logic structure and connection block diagram of the central control circuit board of the DC transmission valve cooling system of the present invention;

[0014] Figure 3 It is a reference diagram of the usage state of the portable control and protection function test device for the DC transmission valve cooling system of the present invention.

[0015] In the figure:

[0016] 1 - Suitcase; 11 - Electrical quick-connect interface;

[0017] 2 - Central control circuit board; 21 - Communication interface module, 22 - Main control module, 23 - AO channel module, 24 - AI channel module, 25 - Power conversion module;

[0018] 3 - Touch screen;

[0019] 4 - Universal test quick-connect attachment; 41 - Channel connection cable, 42 - Terminal connector. Specific implementation mode

[0020] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left", "right", "front", "rear", "top", "bottom", "inside", "outside", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation to the present invention.

[0022] The following uses specific embodiments to further describe the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0023] Embodiment 1: As Figure 1 、 2As shown in the figure, the portable control and protection function test device for the DC transmission valve cooling system includes a suitcase 1 and a test mechanism assembled in the suitcase 1. Among them, the test mechanism includes a central control circuit board 2, a touch screen 3, and a general test quick-install connection accessory 4; the central control circuit board 2 is serially connected to the touch screen 3, and the central control circuit board 2 is integrated with a communication interface module 21, a main control module 22, an AO channel module 23, an AI channel module 24, and a power conversion module 25; the touch screen 3 is bidirectionally connected to the main control module 22 through the communication interface module 21, the output end of the main control module 22 is connected to the AO channel module 23 and the AI channel module 24, the general test quick-install connection accessory 4 is connected to the central control circuit board 2 through the AO channel module 23 and the AI channel module 24, and the power conversion module 25 supplies power to each module on the central control circuit board and the touch screen. After the AO channel module and the AI channel module are connected to the AI channel, sensors, and instruments of the valve cooling system to be tested, the touch screen outputs control commands to the AO channel module and the AI channel module on the main control circuit board through the main control module, adjusts the output current on the AO channel module, and simulates the parameter changes of the corresponding sensors or instruments to establish the start-up working condition of the valve cooling system equipment, observes whether the valve cooling system can control the relevant equipment normally, the central control circuit board collects data through the AI channel module, and at the same time outputs real-time data to the touch screen, which can realize the test of the output data or the transmitter feedback signal of the valve cooling system. The main control module on the main control circuit board provides a variety of channel calibration methods, which can be automatically calibrated inside the device, or manually calibrated by connecting an external instrument or comparing the parameter display of the valve cooling HMI.

[0024] Embodiment 2: The portable control and protection function test device for the DC transmission valve cooling system. The general test quick-install connection accessory 4 includes a channel connection cable 41 and a terminal connector 42. The terminal connector is arranged at the free end of the channel connection cable, and the channel connection cable is respectively connected to the AO channel module and the AI channel module of the central control circuit board. The rest of the structure and components are as described in Embodiment 1 and will not be repeated.

[0025] Embodiment 3: The portable control and protection function test device for the DC transmission valve cooling system. An electrical quick-install interface 11 is movably installed in the suitcase 1, and the electrical quick-install interface 11 is connected to the corresponding channel connection cable 41 through the terminal connector 42. The channel connection cable can conveniently establish an electrical loop connection relationship with the power supply or the system and instrument to be tested through the electrical quick-install interface and the terminal connector. The rest of the structure and components are as described in Embodiment 1 and will not be repeated.

[0026] Embodiment 4: The portable control and protection function test device for the DC transmission valve cooling system. The central control circuit board 2, the touch screen 3, and the general test quick-connecting attachment 4 are fixed in the suitcase 1 by fixing parts. While all the test mechanisms are stored in the suitcase, the test mechanisms are integrated with the portable suitcase, which is convenient for carrying and prevents damage caused by vibration and collision during the lacing process. The remaining structures and components are as described in Embodiment 1 and will not be repeated.

[0027] During use: This test device uses a general quick-connecting cable to introduce AC220V power for device power supply. The valve cooling on-site screen cabinet is generally equipped with an AC220V test socket, which can be conveniently connected nearby as the device power supply; the internal battery can also be used for device power supply, and the battery can also be charged by introducing power through the electrical quick-connect interface. As Figure 3 shown, taking the AO single channel of the device as an example, before using the test device, disconnect the wiring knife switch terminals S1 and S2 of the valve cooling system sensor device, use the quick-connecting cable of the test device to connect the AO channel module of the test device to the corresponding terminal of the AI channel of the valve cooling control and protection system, and then perform relevant test functions through touch screen operation. The AO channel module of the test device is configured with multiple AO channels, which can output simultaneously to meet the diverse test conditions of the valve cooling system; the AI channel module of the test device, combined with the externally supplied DC24V power supply, can meet the requirements of different instrument tests for two-wire, three-wire, and four-wire systems; based on the general test quick-connecting attachment, the quick inspection of the access signals of spare parts instruments or equipment-mounted instruments is realized. The electrical quick-connect interfaces of the AO channel and the AI channel of the test device can realize the short-circuit calibration of the AO-AI channel, and can also use the externally connected AI channel signal or the externally connected AO channel signal for comparison calibration.

[0028] The portable control and protection function test device for the DC transmission valve cooling system overcomes the defects of the existing control and protection function logic test methods for valve cooling systems, such as numerous working conditions, complex test operations, long debugging time, and long maintenance cycle. It can be connected to the control and protection device of the valve cooling system, simulate various operating conditions of the valve cooling system through user operations, and obtain real-time data, realizing the efficient verification of the control and protection functions of the valve cooling system. At the same time, it reduces the difficulty of troubleshooting the instrument loop in the industrial field and the function test before replacing spare parts instruments.

[0029] The above description shows the main features, basic principles, and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments or examples, and without departing from the spirit or basic features of the present utility model, the present utility model can be implemented in other specific forms. Therefore, the above embodiments or examples should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A portable control and protection function test device for a DC transmission valve cooling system, characterized by: The invention comprises a suitcase (1) and a testing mechanism assembled in the suitcase (1), wherein: The testing mechanism comprises a central control circuit board (2), a touch screen (3), and a universal test quick-install connection accessory (4); the central control circuit board (2) is serially connected to the touch screen (3), and a communication interface module (21), a main control module (22), an AO channel module (23), an AI channel module (24), and a power conversion module (25) are integrated on the central control circuit board (2); The touch screen (3) is bidirectionally data-connected to the main control module (22) via the communication interface module (21); the output end of the main control module (22) is connected to the AO channel module (23) and the AI ​​channel module (24); the universal test quick-connection accessory (4) is connected to the central control circuit board (2) via the AO channel module (23) and the AI ​​channel module (24); and the power conversion module (25) supplies power to each module on the central control circuit board and the touch screen.

2. The portable control and protection function test device for the DC transmission valve cooling system according to claim 1 is characterized by: The universal test quick-connection accessory (4) comprises a channel connection cable (41) and a terminal connector (42).

3. The portable control and protection function test device of the DC transmission valve cooling system according to claim 2 is characterized by: An electrical quick-install interface (11) is movably installed in the suitcase (1), and the electrical quick-install interface (11) is connected to a corresponding channel connection cable (41) via a terminal connector (42).

4. The portable control and protection function test device for the DC transmission valve cooling system according to claim 3 is characterized by: The central control circuit board (2), the touch screen (3), and the universal test quick-install connection accessories (4) are fixed in the suitcase (1) via fixing parts.

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