Generator excitation on-line monitoring system device

Abstract

The utility model relates to the field of electric monitoring, and discloses a generator excitation on-line monitoring system device, which comprises a collecting ring acquisition device, a shaft voltage and shaft current monitoring device and an excitation transformer acquisition device which are connected with a system server cabinet, the shaft voltage and shaft current monitoring device is connected with a generator through a shaft voltage and shaft current sensor, and the excitation transformer acquisition device is connected with a system server cabinet. The excitation transformer acquisition device is connected with a copper bar temperature measurement sensor and an iron core temperature measurement sensor in the excitation transformer chamber; and the collector ring acquisition device is connected with a collector ring carbon brush current sensor, a collector ring carbon brush temperature sensor, a collector ring carbon brush ignition sensor, a collector ring temperature and humidity sensor and a collector ring hydrogen sensor. All the parts are integrated in one place, measures can be taken for the parts with problems in the first time, time is saved, the safety coefficient is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electrical monitoring, in particular to a generator excitation online monitoring system device. Background Art

[0002] Existing generator excitation systems fail to collect data on carbon brush current, temperature, sparking, temperature and humidity, hydrogen leakage, shaft voltage and current, busbar temperature, and core temperature during operation. Alternatively, the monitoring equipment is fragmented and distributed, preventing centralized monitoring and diagnosis within a single system. Consequently, when the equipment experiences excessive temperatures, abnormal operation, carbon brush sparking, or hydrogen leakage, problems cannot be detected and addressed immediately, leading to equipment failures and potential safety incidents.

[0003] Patent Publication No. CN201120123847 discloses a real-time monitoring system for the operating status of a doubly-fed wind turbine generator set. The system includes a sensor unit for detecting multiple parameter signals during generator operation, a transmitter unit for amplifying or converting the parameter signals into standard parameter signals, a signal acquisition unit for collecting the standard parameter signals sent by the signal transmitter unit, and a status analysis unit for performing real-time analysis and processing of the standard parameter signals to monitor the operating status of the generator. The detection capabilities of this system are relatively limited, and if other components require monitoring, these monitoring processes require significant time. If the monitored components require maintenance, the components are relatively fragmented, resulting in a waste of time.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Invention

[0005] In order to solve the above problems, the utility model discloses a generator excitation online monitoring system device, in which various parts are integrated in one place, and measures can be taken to the part where the problem occurs in the first time, saving time, improving the safety factor, and reducing the labor intensity of the staff.

[0006] The technical solution of the utility model is: a generator excitation online monitoring system device, including a collector ring acquisition device connected to the system server cabinet, a shaft voltage and shaft current monitoring device and an excitation transformer acquisition device, the shaft voltage and shaft current monitoring device is connected to the generator through a shaft voltage and shaft current sensor, the excitation transformer acquisition device is connected to the copper bus temperature sensor and the iron core temperature sensor in the excitation transformer chamber, the collector ring acquisition device is connected to the collector ring carbon brush current sensor, the collector ring carbon brush temperature sensor, the collector ring carbon brush ignition sensor, the collector ring temperature and humidity sensor and the collector ring hydrogen sensor.

[0007] Preferably, the shaft voltage and shaft current sensors are installed at the steam end and the excitation end of the generator's main shaft. The voltage and shaft current sensors are connected to the steam end through a grounding copper braid and to the excitation end through a measuring carbon brush. The shaft voltage and shaft current sensors are provided with secondary side outlets, and the grounding wires provided on the shaft voltage and shaft current sensors are grounded.

[0008] By adopting the above technical solution, the shaft voltage and shaft current sensor detects the voltage and current data at both ends of the generator's main shaft steam and excitation through the principle of electromagnetic induction, and collects, processes and forwards the detected data to the chip in the shaft voltage and shaft current monitoring device. The shaft voltage and shaft current sensor detects the voltage and current data at both ends of the generator's main shaft steam and excitation through the principle of electromagnetic induction, and collects, processes and forwards the detected data to the chip in the shaft voltage and shaft current monitoring device.

[0009] Preferably, the collector ring carbon brush current sensor is installed on the carbon brush braid of the collector ring chamber, the collector ring carbon brush temperature sensor is installed on the upper part of the inner wall of the generator collector ring chamber, the collector ring carbon brush ignition sensor is installed on the slip ring windshield of the generator collector ring chamber, the collector ring temperature and humidity sensor is installed on one side of the inner wall of the generator collector ring chamber, and the collector ring hydrogen sensor is installed on the other side of the inner wall of the generator collector ring chamber.

[0010] Preferably, the slip ring carbon brush current sensor, slip ring carbon brush temperature sensor, slip ring carbon brush ignition sensor, slip ring temperature and humidity sensor and slip ring hydrogen sensor are respectively connected to corresponding chips in the slip ring acquisition device.

[0011] By adopting the above technical solution, the collector ring carbon brush current sensor detects the current size on the generator collector ring carbon brush braid through the Hall effect, collects the actual current data on the carbon brush braid, processes the collected signal, converts it into a corresponding current signal and forwards it to the generator collector ring acquisition device, the collector ring carbon brush temperature sensor detects the temperature data of the collector ring carbon brush through the thermal radiation principle, and collects, processes and forwards it, the collector ring carbon brush ignition sensor uses the 280-400nm narrow spectrum resolution method through the ultraviolet probe in the sensor to detect the carbon brush ignition ultraviolet light, and collects, processes and forwards the detected data to the corresponding chip in the collector ring acquisition device, the collector ring temperature and humidity sensor detects the temperature and humidity data in the collector ring chamber environment, and collects, processes and forwards the detected data to the corresponding chip in the collector ring acquisition device, the collector ring hydrogen sensor detects the leakage content data of hydrogen in the collector ring chamber, and collects, processes and forwards the detected hydrogen leakage data to the corresponding chip in the collector ring acquisition device.

[0012] Preferably, the excitation transformer chamber includes phase A, phase B and phase C, and copper bars and iron cores are respectively provided in phase A, phase B and phase C. The copper bar temperature sensor and the iron core temperature sensor are respectively provided on the copper bar and the iron core, and the copper bar temperature sensor and the iron core temperature sensor are connected to the corresponding chips in the excitation transformer acquisition device.

[0013] Preferably, the copper busbar temperature sensor is installed on the copper busbar of the generator excitation transformer chamber, and the iron core temperature sensor is installed inside the generator excitation transformer chamber.

[0014] By adopting the above technical solution, the copper busbar temperature sensor obtains the induced electromotive force through the principle of electromagnetic induction and operates the sensor, and collects the temperature data on the copper busbars on the high and low voltage sides of the three-phase excitation transformer ABC through the thermistor, processes the collected temperature signal, and forwards it by wireless transmission. The iron core temperature sensor detects the temperature data of the iron core on the high and low voltage sides of the three-phase excitation transformer ABC through the principle of thermal radiation, and collects, processes and forwards the detected temperature data.

[0015] Preferably, the system server cabinet is connected to the slip ring acquisition device, the shaft voltage and shaft current monitoring device, and the excitation transformer acquisition device through optical fiber, and the data of the chips in the slip ring acquisition device and the excitation transformer acquisition device are collected through the Modbus-TCP protocol and stored in the database.

[0016] By adopting the above technical solution, the system server cabinet stores the collected data in the database and displays the newly stored data on the system screen in real time. When the stored data exceeds the set threshold range, the system will pop up a warning window in time and send an alarm signal to the corresponding collection device.

[0017] The benefits of the present invention are as follows: 1. The present invention integrates the system server cabinet, generator collector ring acquisition device, generator shaft voltage and shaft current monitoring device, and generator excitation transformer acquisition device into an online monitoring system, which can not only collect, process and diagnose data at the same time, but also greatly save the time of daily checking of equipment scattered in various places.

[0018] 2. The utility model centralizes the monitoring of multiple sensors and uses one terminal background, which not only saves space, but also reduces a lot of workload for on-site staff. Multiple data can be viewed in the same place, effectively improving work efficiency.

[0019] 3. The utility model integrates multiple machines into one place. If one of them fails, the staff does not need to go to other places and can complete the maintenance of the machine in the same place, thereby improving the staff's response time and reducing the risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural diagram of the utility model;

[0021] Figure 2 This is a system server cabinet of the utility model;

[0022] Figure 3 This is the motor collector ring collection device of the utility model;

[0023] Figure 4 This is the generator shaft voltage and shaft current monitoring device of the utility model;

[0024] Figure 5 This is the generator excitation variable acquisition device of the utility model;

[0025] Figure 6 This is the generator collector ring carbon brush current sensor of the utility model;

[0026] Figure 7 This is the generator collector ring carbon brush temperature sensor of the utility model;

[0027] Figure 8 This is the generator collector ring carbon brush ignition sensor of the utility model;

[0028] Figure 9 This is the generator collector ring temperature and humidity sensor of the utility model;

[0029] Figure 10 This is the generator slip ring hydrogen sensor of the utility model;

[0030] Figure 11 This is the generator shaft voltage and shaft current sensor of the utility model;

[0031] Figure 12 This is the temperature measuring sensor for the copper bar of the excitation transformer of the utility model;

[0032] Figure 13 The utility model relates to an excitation transformer core temperature measuring sensor.

[0033] Among them: 1. System server cabinet, 2. Collector ring acquisition device, 3. Shaft voltage and shaft current monitoring device, 4. Excitation transformer acquisition device, 4-1. Excitation transformer chamber, 5. Collector ring carbon brush current sensor, 6. Collector ring carbon brush temperature sensor, 7. Collector ring carbon brush ignition sensor, 8. Collector ring temperature and humidity sensor, 9. Collector ring hydrogen sensor, 10. Shaft voltage and shaft current sensor, 10-1. Secondary side output line, 10-2. Grounding wire, 11. Copper busbar temperature sensor, 12. Iron core temperature sensor, 13. Collector ring chamber, 14. Generator, 14-1. Steam end, 14-2. Excitation end. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] like Figure 1 As shown, the generator excitation online monitoring system device includes a system server cabinet 1 (such as Figure 2 As shown) connected to the collector ring device 2 (as shown Figure 3 As shown), shaft voltage and shaft current monitoring device 3 (as shown Figure 4 As shown) and the excitation variable acquisition device 4 (as Figure 5 As shown), the shaft voltage and shaft current monitoring device is connected to the generator 14 through the shaft voltage and shaft current sensor 10, the excitation transformer acquisition device 4 is connected to the copper bus temperature sensor 11 and the iron core temperature sensor 12 in the excitation transformer chamber 4-1, and the slip ring acquisition device 2 is connected to the slip ring carbon brush current sensor 5, the slip ring carbon brush temperature sensor 8, the slip ring carbon brush ignition sensor 6, the slip ring temperature and humidity sensor 8 and the slip ring hydrogen sensor 9.

[0036] like Figure 4 As shown, the shaft voltage and shaft current sensor 10 is installed at the steam end 14-1 and the excitation end 14-2 of the generator main shaft. The shaft voltage and shaft current sensor 10 is connected to the steam end 14-1 through a grounding copper braid and to the excitation end 14-2 through a measuring carbon brush. The shaft voltage and shaft current sensor 10 is provided with a secondary side output line 10-1. The grounding wire 10-2 provided to the shaft voltage and shaft current sensor 10 is grounded. The shaft voltage and shaft current sensor 10 detects the voltage and current data at both ends of the generator main shaft steam and excitation through the principle of electromagnetic induction. The conductor to be measured is connected at the primary coil, and an induced electromotive force is obtained at the secondary coil. This electromotive force is converted into a corresponding voltage and current signal and forwarded to the generator shaft voltage and shaft current monitoring device, and the detected data is collected, processed, and forwarded to the chip in the shaft voltage and shaft current monitoring device 3.

[0037] The shaft voltage and shaft current monitoring device 3 is composed of a shaft voltage acquisition module, a shaft current acquisition module, and a core processing module. The shaft voltage acquisition module and the shaft current acquisition module receive shaft voltage and shaft current sensors 5 (such as Figure 10 The shaft voltage and shaft current analog signals forwarded by the system are converted and filtered by the core processing module, and the processed data are displayed on the screen. At the same time, they are forwarded to the system server cabinet 1. When the system server cabinet alarms, the shaft voltage and shaft current monitoring device 3 will also alarm at the same time.

[0038] Slip ring carbon brush current sensor 5 (such as Figure 6As shown) is installed on the carbon brush braid of the collector ring chamber 13, the collector ring carbon brush temperature sensor 6 is installed on the upper part of the inner wall of the generator collector ring chamber 13, the collector ring carbon brush ignition sensor 7 is installed on the slip ring windshield of the generator collector ring chamber 13, the collector ring temperature and humidity sensor is installed on one side of the inner wall of the generator collector ring chamber, and the collector ring hydrogen sensor 9 is installed on the other side of the inner wall of the generator collector ring chamber 13. The collector ring carbon brush current sensor 5 detects the current on the generator collector ring carbon brush braid through the Hall effect and collects the actual current data on the carbon brush braid. When current flows through the brush braid, a magnetic field is generated around the brush braid, and the current sensor core gathers the magnetic lines of force to the air gap, so that the output end of the Hall element obtains a voltage signal proportional to the magnetic induction intensity, and then the signal is amplified and output through the amplifier circuit, and the collected signal is processed, converted into a corresponding current signal and forwarded to the collector ring acquisition device 2;

[0039] Slip ring carbon brush temperature sensor 6 (such as Figure 7 (as shown) This device detects infrared radiation from a target object based on the principle of thermal radiation and converts the target object's temperature distribution image into a video image through photoelectric conversion, signal processing, and other means. It simultaneously monitors high-definition video, thermal imaging, and surface temperatures of multiple carbon brushes, captures the maximum, minimum, and average temperatures of each brush holder and carbon brush, and forwards the temperature image data to the slip ring acquisition device 2;

[0040] The collector ring carbon brush temperature sensor 6 uses the infrared radiation energy distribution image emitted by the object to determine the temperature distribution of the object being measured. This is a way of passively receiving infrared radiation emitted by the object. The core component is the infrared detector, which is responsible for receiving the infrared rays emitted by the object and converting them into electrical signals. These electrical signals are then processed and converted into image signals to form a thermal imaging map and temperature distribution corresponding to the thermal distribution of the object surface.

[0041] Slip ring carbon brush ignition sensor 7 (such as Figure 8 The device detects the carbon brush ignition ultraviolet light by using the ultraviolet probe in the sensor with a narrow spectrum resolution of 280-400nm, and collects, processes and forwards the detected data to the corresponding chip in the slip ring collection device 2;

[0042] Slip ring temperature and humidity sensor 8 (such as Figure 9 As shown) by detecting the temperature and humidity data in the environment of the slip ring chamber 13, and collecting, processing, and forwarding the detected data to the corresponding chip in the slip ring collection device 2;

[0043] Slip ring hydrogen sensor 9 (such as Figure 10As shown) is achieved by detecting the leakage content data of hydrogen in the slip ring chamber 13, and collecting, processing and forwarding the detected hydrogen leakage data to the corresponding chip in the slip ring collection device 2.

[0044] The slip ring carbon brush current sensor 5, the slip ring carbon brush temperature sensor 6, the slip ring carbon brush ignition sensor 7, the slip ring temperature and humidity sensor 8 and the slip ring hydrogen sensor 9 are respectively connected to corresponding chips in the slip ring acquisition device.

[0045] The excitation transformer chamber 4-1 includes phase A, phase B and phase C. Copper bars and iron cores are respectively provided in phase A, phase B and phase C. The copper bar temperature sensor 11 and the iron core temperature sensor 12 are respectively provided on the copper bar and the iron core. The copper bar temperature sensor 11 and the iron core temperature sensor 12 are connected to the corresponding chips in the excitation transformer acquisition device 4.

[0046] Copper busbar temperature sensor 11 (such as Figure 12 As shown) is installed on the copper bar 4-1 of the generator excitation transformer chamber, and the core temperature sensor 12 (as shown) Figure 13 As shown) is installed inside the generator excitation transformer chamber 4-1, the copper busbar temperature sensor 11 is wirelessly powered and transmits power. The copper busbar temperature sensor 11 obtains the induced electromotive force through the principle of electromagnetic induction and operates as a sensor. It collects the temperature data on the copper busbars on the high and low voltage sides of the excitation transformer ABC three-phase through a thermistor. The output terminal voltage of the thermistor is proportional to the actual temperature. The voltage signal at the output terminal is processed and converted into corresponding temperature data, which is forwarded to the excitation transformer acquisition device 4 through wireless transmission. The core temperature sensor 12 detects the core temperature data on the high and low voltage sides of the excitation transformer ABC three-phase through the principle of thermal radiation, and collects, processes and forwards the detected temperature data.

[0047] The system server cabinet 1 is connected to the slip ring acquisition device 2, the shaft voltage and shaft current monitoring device 3, and the excitation transformer acquisition device 4 through optical fiber. The data of the chips in the slip ring acquisition device 2 and the excitation transformer acquisition device 4 are collected through the Modbus-TCP protocol and stored in the database. At the same time, the newly stored data is displayed in real time on the system screen. When the stored data exceeds the set threshold range, the system will pop up a warning window in time and send an alarm signal to the corresponding acquisition device.

[0048] Those skilled in the art will understand that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. Generator excitation online monitoring system device, including a slip ring data acquisition device connected to the system server cabinet, a shaft voltage and shaft current monitoring device, and an excitation transformer data acquisition device, characterized by: The shaft voltage and shaft current monitoring device is connected to the generator through the shaft voltage and shaft current sensor, the excitation transformer acquisition device is connected to the copper busbar temperature sensor and the iron core temperature sensor in the excitation transformer chamber, and the slip ring acquisition device is connected to the slip ring carbon brush current sensor, the slip ring carbon brush temperature sensor, the slip ring carbon brush ignition sensor, the slip ring temperature and humidity sensor and the slip ring hydrogen sensor.

2. The generator excitation online monitoring system according to claim 1, characterized in that: The shaft voltage and shaft current sensors are installed at the steam end and the excitation end of the generator's main shaft. The voltage and shaft current sensors are connected to the steam end through a grounding copper braid and to the excitation end through a measuring carbon brush. The shaft voltage and shaft current sensors are provided with secondary side outlets, and the grounding wire provided on the shaft voltage and shaft current sensors is grounded.

3. The generator excitation online monitoring system according to claim 1, characterized in that: The slip ring carbon brush current sensor is installed on the carbon brush braid of the slip ring chamber, the slip ring carbon brush temperature sensor is installed on the upper part of the inner wall of the generator slip ring chamber, the slip ring carbon brush ignition sensor is installed on the slip ring windshield of the generator slip ring chamber, the slip ring temperature and humidity sensor is installed on one side of the inner wall of the generator slip ring chamber, and the slip ring hydrogen sensor is installed on the other side of the inner wall of the generator slip ring chamber.

4. The generator excitation online monitoring system according to claim 1, characterized in that: The slip ring carbon brush current sensor, slip ring carbon brush temperature sensor, slip ring carbon brush ignition sensor, slip ring temperature and humidity sensor and slip ring hydrogen sensor are respectively connected to corresponding chips in the slip ring acquisition device.

5. The generator excitation online monitoring system according to claim 1, characterized in that: The excitation transformer chamber includes phase A, phase B and phase C, and copper bars and iron cores are respectively provided in phase A, phase B and phase C. The copper bar temperature sensor and the iron core temperature sensor are respectively provided on the copper bar and the iron core. The copper bar temperature sensor and the iron core temperature sensor are connected to corresponding chips in the excitation transformer acquisition device.

6. The generator excitation online monitoring system according to claim 5, characterized in that: The copper busbar temperature sensor is installed on the copper busbar of the generator excitation transformer small chamber, and the iron core temperature sensor is installed inside the generator excitation transformer small chamber.

7. The generator excitation online monitoring system according to claim 1, characterized in that: The system server cabinet is connected to the slip ring acquisition device, the shaft voltage and shaft current monitoring device, and the excitation transformer acquisition device through optical fibers, and collects data from the chips in the slip ring acquisition device and the excitation transformer acquisition device through the Modbus-TCP protocol and stores them in a database.

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