Wireless debugging device for generator excitation system
By designing a wireless commissioning device for generator excitation systems, and utilizing a D-SUB connector and ESP32 module to achieve long-distance wireless commissioning, the safety issues of commissioning personnel are solved, and commissioning safety and efficiency are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NR ENG CO LTD
- Filing Date
- 2025-04-03
- Publication Date
- 2026-05-08
AI Technical Summary
During the commissioning of existing generator excitation systems, it is difficult for commissioning personnel to maintain a safe distance, there is a risk of high voltage, and the safety of the commissioning environment cannot be guaranteed.
Design a wireless commissioning device for a generator excitation system, including a test unit, a connection unit, and an interaction unit. It connects to the excitation system via a D-SUB connector and uses an ESP32 module to achieve wireless communication with a host computer, enabling remote commissioning.
It enables long-distance wireless commissioning of the generator excitation system, improving commissioning safety and efficiency, and ensuring the safety of commissioning personnel.
Smart Images
Figure CN224216836U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of excitation system technology, and in particular to a wireless debugging device for generator excitation systems. Background Technology
[0002] The excitation system is a crucial component of a generator, providing adjustable excitation current to meet the needs of normal generator operation and safe power system operation. Therefore, regulating and controlling the generator's excitation not only ensures the reliability, safety, and stability of the generator and power system, but also improves their technical and economic indicators.
[0003] Due to the need for higher levels of grid stability, some power grids place higher demands on the excitation systems of small-capacity generating units within the system. Generally, such as... Figure 1 The excitation system shown consists of a regulating cabinet, a rectifier cabinet, and a demagnetizing cabinet. Before the generator excitation system is assembled and put into formal use, it generally needs to be debugged to confirm the initial settings of each line and parameter, ensuring that the excitation system wiring is correct and the functions are complete before use. The debugging device is located in the debugging cabinet. During the debugging process of the excitation system, the host computer waveform analysis software needs to be connected to the excitation regulator to obtain electrical data in real time, facilitating the analysis of debugging technical indicators and the handling of anomalies. In the existing technology, it is difficult for debugging personnel to maintain a safe distance from the generator excitation system during the debugging process, which may expose the safety of debugging personnel to the dangers of high voltage electricity, and the safety of the debugging environment is difficult to ensure. Utility Model Content
[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application. Such simplifications or omissions shall not be used to limit the scope of this utility model.
[0005] To address the shortcomings of existing technologies, one objective of this utility model is to provide a wireless debugging device for generator excitation systems.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a wireless debugging device for a generator excitation system, comprising a debugging cabinet,
[0007] The test unit includes an interface circuit that connects to the external interface of the excitation system, an input test module that is sequentially connected to the interface circuit and has multiple DIP switches, an output test module that has multiple prompts, and a power test module that has multiple power sockets.
[0008] The connection unit includes multiple D-SUB connectors adapted to the test unit, each D-SUB connector having multiple pins; and,
[0009] The interaction unit includes an ESP32 module with access interface circuitry and integrated wireless communication, as well as an RS232 serial port module connected to the host computer.
[0010] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, each pin of the D-SUB connector is connected to a DIP switch of the input test module, a prompt of the output test module, and a power socket of the power test module.
[0011] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, the interface circuit includes a three-phase voltage regulator and a rectifier bridge connected to the excitation system.
[0012] The power supply test module inputs the power signal to the input test module via a D-SUB connector.
[0013] The power signal output from the input test module is regulated by a three-phase voltage regulator and then output to a rectifier bridge. After being rectified into DC power by the rectifier bridge, it is output to the output test module.
[0014] The DC power output from the output test module is used as input to the generator to be excited.
[0015] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, each of the multiple DIP switches, multiple indicator devices, and multiple power sockets is provided with a unique number.
[0016] As a preferred embodiment of the wireless debugging device for a generator excitation system described in this utility model, the RS232 serial port module includes a driver chip and two DB9 serial ports.
[0017] The driver chip is connected to the interface circuit through the input test module.
[0018] Two DB9 serial ports are connected to the generator excitation system respectively to enable simultaneous commissioning of two generator excitation systems.
[0019] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, the ESP32 module integrates Bluetooth and WiFi, enabling data interaction with two excitation systems wirelessly.
[0020] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, the test unit further includes a sampling and measurement module, which uses a relay protection tester and is connected to the interface circuit via a D-SUB connector.
[0021] As a preferred embodiment of the wireless debugging device for a generator excitation system described in this utility model, the sampling and measurement module includes,
[0022] A DC sampling test circuit is used for DC input debugging; and,
[0023] The low-current test circuit is used for low-voltage, low-current input debugging.
[0024] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, the DC sampling test circuit consists of a voltage transmitter, a voltage divider, and a shunt connected in sequence.
[0025] As a preferred embodiment of the wireless debugging device for generator excitation system described in this utility model, the low current test circuit consists of at least the three-phase voltage regulator, the rectifier bridge, and a pulse triggering device.
[0026] The beneficial effects of the wireless debugging device for generator excitation system of this utility model are as follows: By setting up a test unit, a connection unit, and an interaction unit to cooperate with each other, the test unit can be connected to the excitation system through the connection unit, and long-distance wireless communication and connection with the host computer can be realized through the interaction unit, thus achieving the effect of long-distance wireless debugging. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram illustrating the composition principle of the excitation system in the prior art.
[0029] Figure 2 This is a schematic diagram of the composition of the wireless debugging device for generator excitation system according to this utility model.
[0030] Figure 3 This is a schematic diagram of the DC sampling test circuit of the wireless debugging device for generator excitation system according to this utility model.
[0031] Figure 4 This is a schematic diagram of the low-current test circuit of the wireless debugging device for generator excitation system according to this utility model. Detailed Implementation
[0032] To make the objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0034] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0035] Example 1
[0036] Reference Figure 2 This is the first embodiment of the present invention. This embodiment provides a wireless debugging device for a generator excitation system, which can achieve the effect of long-distance wireless debugging. It includes: a test unit 100, a connection unit 200 and an interaction unit 300. The test unit 100 provides a test module for accessing the excitation system. The test unit 100 is connected to the excitation system through the connection unit 200. The interaction unit 300 realizes long-distance wireless communication and connection with the host computer.
[0037] Specifically, the test unit 100 includes an interface circuit 101 connected to the external interface of the excitation system, and an input test module 102 with multiple DIP switches sequentially connected to the interface circuit 101, an output test module 103 with multiple indicators, and a power test module 104 with multiple power sockets. By inputting specific debugging signals to the input test module 102, each DIP switch corresponds to a specific set of debugging signals. In this embodiment, the indicator in the output test module 103 is an indicator light used to indicate line connectivity, and the power test module 104 provides test power.
[0038] The interface circuit 101 includes a three-phase voltage regulator 101a and a rectifier bridge 101b connected to the excitation system. The power test module 104 inputs the power signal to the input test module 102 through the D-SUB connector. The power signal output by the input test module 102 is regulated by the three-phase voltage regulator 101a and then output to the rectifier bridge 101b. After being rectified into DC power by the rectifier bridge 101b, it is output to the output test module 103. The DC power output by the output test module 103 is used to input the generator to be excited.
[0039] Furthermore, the connection unit 200 includes multiple D-SUB connectors adapted to the test unit 100, each D-SUB connector having multiple pins. The D-SUB connectors in this embodiment mainly include common specifications such as D-SUB 9 (composed of 9 pins 4011), D-SUB 15 (composed of 15 pins 4011), and D-SUB 25 (composed of 25 pins 4011), including 37 pins. This expands the pin count to 37, including 16 sets of input / output pins, 1 set of positive and negative power pins, and 3 reserved pins. The reserved pins can be expanded as needed for functions such as alarms. The connection unit 200 connects the debugging device to the excitation system, and different pins connect to various external interfaces or lines of the excitation system.
[0040] Preferably, each pin of the D-SUB connector is connected to a DIP switch in the input test module 102, an indicator in the output test module 103, and a power socket in the power supply test module 104. Each DIP switch, indicator, and power socket is uniquely numbered. During commissioning, the corresponding D-SUB connector is selected based on the type of external interface of the excitation system under test, connecting one DIP switch, one indicator, and one power socket. The unique number allows for quick and easy identification of the currently tested component.
[0041] The interaction unit 300 includes an access interface circuit 101 and an ESP32 module 301 integrating wireless communication, as well as an RS232 serial port module 302 connected to a host computer. The ESP32 module 301 is part of a series of low-cost, low-power system-on-a-chip (SoC) microcontroller modules designed and manufactured by Espressif Systems, integrating Wi-Fi and dual-mode Bluetooth wireless communication functions. The RS232 serial port module 302 includes a driver chip and two DB9 serial ports. A DB9 serial port is a common D-type connector with nine pins, typically used to connect serial communication devices such as computers, printers, and routers. It conforms to the RS-232 standard and is used to realize serial communication between devices. RS-232 is a serial communication protocol that defines how a computer and external devices exchange data through a serial port. The driver chip is connected to the interface circuit 101 through the input test module 102. In this embodiment, the driver chip is an SP3223EEY chip, which can be used to convert RS232 level to TTL level. TTL level (Transistor-Transistor Logic) is a voltage standard used in digital electronic circuits, mainly used to define the logic level in the circuit. TTL level is derived from transistor-transistor logic gate circuits, which use bipolar transistors (BJTs) to implement logic functions. The two DB9 serial ports are connected to the generator excitation system respectively to realize the simultaneous debugging of two generator excitation systems. The ESP32 module 301 integrates Bluetooth and WiFi to realize data interaction with the two excitation systems wirelessly.
[0042] The ESP32 module 301 program processes the received level signal, checks the data check bit, removes erroneous data, and then sends the data to the host computer via WiFi signal. Similarly, when the host computer issues a command, it sends the command to the ESP32 module 301 via WiFi signal, and finally to the generator excitation system, realizing wireless debugging between the generator excitation system and the host computer.
[0043] Example 2
[0044] Reference Figures 2-4 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a sampling and measurement module 105, which enables sampling and debugging of the excitation system input circuit.
[0045] Specifically, the test unit 100 also includes a sampling and measurement module 105, which uses a relay protection tester, an instrument specifically designed for testing and verifying the performance of relay protection equipment in a power system. The sampling and measurement module 105 is connected to the interface circuit 101 via a D-SUB connector.
[0046] Furthermore, the sampling and measurement module 105 includes a DC sampling test circuit 105a for DC input debugging and a low-current test circuit 105b for low-voltage, low-current input debugging. Sampling and debugging are performed on different power signals input to the excitation system. Generally, the input AC power is rectified to DC power by a rectifier; therefore, this embodiment only samples and debugs the input DC power and low-current power.
[0047] The DC sampling test circuit 105a consists of a voltage transmitter, a voltage divider, and a shunt connected in sequence. The DC sampling principle is as follows: Figure 3 As shown, before disconnecting the wire, first modify the zero-calibration coefficient of the corresponding current channel to make the current display value of that channel zero. If the wire has been disconnected, first short-circuit the disconnected wire with another wire using the remote control interaction unit 300, then apply a millivolt source, first filling the range, modifying the sampling coefficient of the corresponding current channel for calibration, and then applying 50% of the amount, and calibrating the linearity remotely. It is worth noting that during DC voltage sampling, the wire coming from the copper busbar should be disconnected, and the voltage should be applied to the front end of the PD and ND terminals shown in the figure. Do not apply the voltage to the primary copper busbar. A relay protection device can output a DC current of 0-300V.
[0048] Preferably, the low-current test circuit 105b consists of at least a three-phase voltage regulator 101a, a rectifier bridge 101b, and a pulse triggering device. The pulse triggering device uses an NR1221 pulse board, which is a fluoropolymer half-pipe connector. During commissioning, the AC side of the thyristor rectifier bridge 101b is connected to a three-phase power supply with a line voltage of approximately 100V / 50Hz (or a 100V / 400Hz intermediate frequency power supply—corresponding to the actual operating power supply of the device) via the three-phase voltage regulator 101a, and the DC output is connected to a sliding rheostat load (50Ω / 4.5A).
[0049] Small current test procedure: as follows Figure 4 As shown, firstly, the three-phase voltage regulator 101a is operated via wireless signal to raise the AC voltage of the rectifier bridge to 100V. Then, a wireless signal command is sent to set the control mode handle on the panel of the excitation regulating cabinet to the "constant angle" position. Next, it is checked that the control mode on the excitation regulator screen should be "open-loop control". At the same time, it is checked that the "anode voltage, frequency and phase of the controllable rectifier bridge" and the "synchronous frequency and phase of the pulse trigger device" are correct. Then, the AC side disconnect switch of the rectifier bridge 101b is closed, and the "set value pulse cut" is exited. Then, the "start / stop control" handle is operated to the "excitation" position. After receiving the excitation command, the excitation regulator outputs a trigger pulse. Finally, the magnetic adjustment handle is operated via wireless signal command to make the control angle α change between the minimum open-loop trigger angle αmin and the maximum open-loop trigger angle αmax (αmin and αmax are set in the "excitation regulation range set value" according to the actual engineering situation). The output voltage waveform is observed with an oscilloscope to confirm whether it meets the requirements.
[0050] The rest of the structure is the same as in Example 1.
[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A wireless debugging device for a generator excitation system, characterized in that: Including those located in the test cabinet, The test unit (100) includes an interface circuit (101) connected to the external interface of the excitation system, and an input test module (102) connected to the interface circuit (101) and having multiple DIP switches, an output test module (103) having multiple prompts, and a power test module (104) having multiple power sockets. The connection unit (200) includes a plurality of D-SUB connectors adapted to the test unit (100), each D-SUB connector having a plurality of pins; and, The interaction unit (300) includes an access interface circuit (101) and an ESP32 module (301) integrating wireless communication, as well as an RS232 serial port module (302) connected to a host computer.
2. The wireless debugging device for a generator excitation system as described in claim 1, characterized in that: Each pin in the D-SUB connector is connected to a DIP switch of the input test module (102), a prompt of the output test module (103), and a power jack of the power test module (104).
3. The wireless debugging device for a generator excitation system as described in claim 2, characterized in that: The interface circuit (101) includes a three-phase voltage regulator (101a) connected to the excitation system and a rectifier bridge (101b). The power test module (104) inputs the power signal to the input test module (102) through the D-SUB connector. The power signal output by the input test module (102) is regulated by the three-phase voltage regulator (101a) and then output to the rectifier bridge (101b). After being rectified into DC power by the rectifier bridge (101b), it is output to the output test module (103). The DC power output from the output test module (103) is used to input the generator to be excited.
4. The wireless debugging device for a generator excitation system as described in claim 3, characterized in that: Each of the aforementioned DIP switches, the aforementioned indicator, and the aforementioned power sockets is provided with a unique number.
5. The wireless debugging device for a generator excitation system as described in claim 4, characterized in that: The RS232 serial port module (302) includes a driver chip and two DB9 serial ports. The driver chip is connected to the interface circuit (101) through the input test module (102). Two DB9 serial ports are connected to the generator excitation system respectively to enable simultaneous commissioning of two generator excitation systems.
6. The wireless debugging device for a generator excitation system as described in claim 5, characterized in that: The ESP32 module (301) integrates Bluetooth and WiFi, enabling wireless data interaction with the two excitation systems.
7. The wireless debugging device for a generator excitation system as described in claim 3, 5, or 6, characterized in that: The test unit (100) also includes a sampling measurement module (105), which uses a relay protection tester and is connected to the interface circuit (101) via a D-SUB connector.
8. The wireless debugging device for a generator excitation system as described in claim 7, characterized in that: The sampling and measurement module (105) includes, A DC sampling test circuit (105a) is used for DC input debugging; and, The low-current test circuit (105b) is used for low-voltage, low-current input debugging.
9. The wireless debugging device for a generator excitation system as described in claim 8, characterized in that: The DC sampling test circuit (105a) consists of a voltage transmitter, a voltage divider, and a shunt connected in sequence.
10. The wireless debugging device for a generator excitation system as described in claim 8 or 9, characterized in that: The low-current test circuit (105b) consists of at least the three-phase voltage regulator (101a), the rectifier bridge (101b), and a pulse triggering device.