CN204269221U - A kind of power capacitor vibration on-line monitoring device - Google Patents

Abstract

The utility model discloses an online monitoring device for power capacitor vibration, which is characterized in that it includes the following components: a plurality of vibration monitoring sensors (2), a GPS synchronous time synchronization sampling module, a data collection and processing base station, and a remote management and monitoring terminal for analysis and diagnosis. The number of vibration monitoring sensors (2) mentioned above is the same as the number of housing surfaces (1) of the power capacitor, each vibration monitoring sensor (2) is installed on each housing surface (1), and each vibration monitoring sensor (2) All have unique addresses, the output terminals of several vibration monitoring sensors (2) are connected to the input terminals of the GPS synchronous time synchronization sampling module, the output terminals of the GPS synchronous time synchronization sampling module are connected to the input terminals of the data processing base station, and the output terminals of the data processing base station The terminal is connected with the analysis and diagnosis remote management monitoring terminal, and the analysis and diagnosis remote management and monitoring terminal is correspondingly connected with the control terminal of the power capacitor.

Description

A power capacitor vibration on-line monitoring device

technical field

The utility model relates to the technical field of on-line detection of electric power equipment, in particular to an on-line detection device for power capacitor vibration.

Background technique

The power capacitor is an important equipment in the power transmission and transformation system of the substation. Its main function is to compensate the reactive power of the line, improve the power factor to improve the power supply quality, limit the voltage rise, protect the electrical equipment, reduce line loss and maintain reactive power. balance. With the rapid development of my country's economy and the improvement of people's living standards, the scale of the power grid is gradually expanding, and the requirements for power quality are getting higher and higher. The application of power capacitor banks in power systems is becoming more and more extensive. In order to improve the power factor of the line, suppress the power frequency overvoltage of the system, and ensure the safe and stable operation of the system, power capacitors are indispensable equipment in substations. Substation power capacitors will vibrate due to various reasons in actual operation. If the vibration is too large, it will affect the voltage quality, which is not conducive to loss reduction and efficiency increase. At the same time, excessive noise will be generated, which will seriously affect production safety and production operation environment. There are cases of faults caused by power capacitors due to vibration in major regional power grids. Therefore, in order to ensure the safety of the power capacitor operation process, as well as the normal service life of the equipment and the quality of the power grid, care should be taken to ensure that the power capacitor is always maintained within the allowable vibration range. In addition, the change of capacitor vibration is also one of the important bases for judging the trend of power capacitor faults. By monitoring the vibration amplitude and frequency of capacitors, the working status of capacitors can be judged accordingly, and data support is provided for pre-judgment of capacitor faults.

Contents of the invention

The utility model provides an online monitoring device for power capacitor vibration, which can realize the acquisition and transmission of synchronous vibration detection data, has the advantages of convenient management, high vibration monitoring precision, accuracy and timeliness, and remote transmission control, and improves the reliability of the capacitor bank. Safe and reliable operation.

The utility model adopts the following technical solutions: an online monitoring device for power capacitor vibration, which includes the following components: several vibration monitoring sensors, GPS synchronous time synchronization sampling module, data collection and processing base station, and analysis and diagnosis remote management and monitoring terminal. The number of several vibration monitoring sensors is the same as the number of several shell surfaces of the power capacitor. Each vibration monitoring sensor is installed on each shell surface. Each vibration monitoring sensor has a unique address. The output terminals of several vibration monitoring sensors are synchronized with the GPS. The input terminal of the time sampling module is connected, the output terminal of the GPS synchronous time synchronization sampling module is connected to the input terminal of the data processing base station, the output terminal of the data processing base station is connected to the analysis and diagnosis remote management monitoring terminal, and the analysis and diagnosis remote management monitoring terminal is connected to the power capacitor The control terminal is correspondingly connected, and the vibration monitoring sensor is used to perform vibration detection on the power capacitor to obtain detection data, and the detection data is wirelessly transmitted to the GPS synchronous time synchronization sampling module for synchronous time synchronization sampling processing and then transmitted to the data collection and processing base station, The data collection and processing base station calculates and processes the collected monitoring data, and obtains the static data of the monitoring parameters, including the peak-to-peak value, effective value and harmonic value of the vibration signal of the shell surface, and transmits the obtained static data to the remote management and monitoring terminal for analysis and diagnosis. Analysis and diagnosis The remote management and monitoring terminal judges the vibration state of the power capacitor and issues corresponding operation instructions to control the power capacitor to realize real-time monitoring and control.

The vibration monitoring sensor is bonded and connected to the shell of the power capacitor through the magnetic base. The vibration monitoring sensor and the GPS synchronous time synchronization sampling module are connected by wireless transmission, and the wireless transmission is Bluetooth transmission. The vibration monitoring sensor is set as a wireless laser vibration sensor, and the collection mode of the wireless laser vibration sensor is a continuous automatic collection mode with an interval of 5 minutes or a manual trigger mode at the same time. The data collection and processing base station and the analysis and diagnosis remote management and monitoring terminal are connected by a 3GHz wireless network.

The data transmission between the data collection and processing base station and the remote management and monitoring terminal for analysis and diagnosis is carried out through the international communication protocol IEC60850. The data collection and processing base station is arranged in the substation, the data collection and processing base station includes a signal acquisition module and a signal conditioning circuit, the output end of the GPS synchronous timing sampling module is connected with the signal acquisition module and the signal conditioning circuit in turn, and the signal acquisition module is used for Perform analog/digital conversion and data transmission on the collected monitoring data. The signal conditioning circuit is used to filter, amplify and convert the transmitted data. The signal acquisition module performs analog/digital conversion on the collected monitoring data and then transmits it to the signal conditioning circuit. The signal conditioning circuit is used for filtering, amplifying and converting the transmitted data. The analysis and diagnosis remote management monitoring terminal is equipped with a control host, which receives static data and stores, analyzes and processes the static data, and judges the vibration state of the power capacitor according to the processing result and issues corresponding operation instructions to the power capacitor Alarm and control.

The utility model has the following beneficial effects: after adopting the above technical scheme, the utility model can realize synchronous vibration detection data collection and sending, has the advantages of convenient management, high vibration monitoring precision, accuracy and timeliness, and remote transmission control, and improves the Safe and reliable operation of the capacitor bank. The data monitoring and acquisition of the utility model adopts a wireless laser vibration sensor, which can continuously and on-line detect the vibration parameters of the power capacitor in the substation, and realize the real-time measurement of the vibration parameters of the capacitor equipment; the use of wireless communication solves the possible problems caused by laying cables The investment, cost and security issues are realized, the data is continuously, safely, isolated, and accurately transmitted, and the system cost is reduced. At the same time, the use of digital transmission technology enhances the anti-interference ability and improves the reliability of the data. The GPS clock signal synchronous time synchronization sampling technology adopted by the device of the utility model can conveniently provide a unified clock signal of the network, add a time label to the measured data, and realize the comparison of data in different places under the same time reference coordinate system, which is more accurate and safe , so that the processing of the remote monitoring center is accurate and reliable. The data result transmission between the base station of the utility model device and the remote monitoring center is based on the IEC61850 standard communication protocol, which regulates the communication process and can realize data comparison and analysis between multiple locations and regions, so that the utility model device and the main Station network compatibility is better.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of a wireless laser vibration sensor for measuring points on a power capacitor shell of the utility model.

Fig. 3 is a working flow chart of the online monitoring device of the present invention.

Detailed ways

Embodiment 1, in Fig. 1, the utility model is an online monitoring device for power capacitor vibration, which includes the following components: four vibration monitoring sensors 2, GPS synchronous time synchronization sampling module, data collection and processing base station and analysis and diagnosis remote management Monitoring terminal, the four vibration monitoring sensors 2 have the same number as the four shell surfaces of the power capacitor, the power capacitor housing is provided with outgoing terminals 3, and each vibration monitoring sensor 2 is installed on each shell surface 1 , the vibration monitoring sensor 2 is attached to the shell surface 1 of the power capacitor through a magnetic base, each vibration monitoring sensor 2 has a unique address, and the output terminals of the four vibration monitoring sensors 2 are connected to the input terminals of the GPS synchronous time synchronization sampling module , the vibration monitoring sensor 2 and the GPS synchronous time synchronization sampling module are connected by wireless transmission, the vibration monitoring sensor is set as a wireless laser vibration sensor, and the collection method of the wireless laser vibration sensor is continuous automatic collection at intervals of 5 minutes or manual instructions at the same time Trigger mode, the output end of the GPS synchronous time synchronization sampling module is connected to the input end of the data processing base station, the GPS synchronous time synchronization sampling module starts synchronously sampling the wireless laser vibration sensors at different positions, and makes the detection data collected by the data processing base station It has a high-precision clock signal to improve the data comparison accuracy of the remote monitoring center. The output end of the data processing base station is connected to the analysis and diagnosis remote management monitoring terminal, and the analysis and diagnosis remote management monitoring terminal is connected to the control end of the power capacitor. The vibration monitoring Sensor 2 is used to perform vibration detection on the power capacitor to obtain detection data. The detection data is transmitted wirelessly to the GPS synchronous time synchronization sampling module for synchronous time synchronization sampling processing and then transmitted to the data collection and processing base station. The data collection and processing base station processes the collected monitoring data. Calculation and processing to obtain the static data of the monitoring parameters, including the peak-to-peak value, effective value and harmonic value of the vibration signal of the shell surface 1, and the obtained static data is transmitted to the analysis and diagnosis remote management monitoring terminal, and the data collection and processing base station and the analysis and diagnosis remote management The monitoring terminals are connected by 3GHz wireless network transmission, the data collection and processing base station and the analysis and diagnosis remote management monitoring terminal carry out data transmission through the international communication protocol IEC60850, and the analysis and diagnosis remote management monitoring terminal judges the vibration state of the power capacitor and sends a corresponding response The operation instructions control the power capacitor to realize real-time monitoring and control. The data collection and processing base station is set in the substation. The data collection and processing base station includes a signal acquisition module and a signal conditioning circuit. The output terminal of the GPS synchronous timing sampling module is sequentially connected with The signal acquisition module is connected with the signal conditioning circuit. The signal acquisition module is used for analog/digital conversion and data transmission of the collected monitoring data. The signal conditioning circuit is used for filtering, amplifying and converting the transmitted data. The signal acquisition module will collect the The monitoring data is transferred to the signal conditioning circuit after analog/digital conversion, and the signal conditioning circuit is used to filter, amplify and convert the transmitted data. The remote management and monitoring terminal for analysis and diagnosis is provided with a control host to control The host receives static data and stores, analyzes and processes the static data, and judges the vibration state of the power capacitor according to the processing results, and issues corresponding operation instructions to alarm and control the power capacitor. Record maximum value, minimum value and average value at intervals, form trend data, and carry out dynamic graphical display. In Fig. 2, four typical test points are respectively selected on the four casing surfaces 1 of the power capacitor in the first embodiment, and the surface of the power capacitor Four typical test points are placed on the vibration-sensitive points on the surface of the power capacitor that can reflect the magnitude and frequency of vibration. Each test point is equipped with a wireless laser vibration sensor, which is attached to the shell surface 1 of the power capacitor through a magnetic force base. The wireless laser vibration sensor It is set to regular automatic measurement with a time interval of 30 seconds. In addition, the measurement control system is manually started at any time. After starting, the vibration signals of the four vibration test points of the power capacitor are measured synchronously. The measured vibration signals are transmitted wirelessly to the GPS for synchronization. The time synchronization sampling module obtains the vibration detection quantity with the clock signal, and the vibration detection quantity is the surface vibration acceleration of the power capacitor.

With reference to Fig. 1, Fig. 2 and Fig. 3, the work flow of the utility model is as follows: the device starts to work, after the wireless laser vibration sensor performs signal conditioning and acquisition, the wireless laser vibration sensor installed on the power capacitor monitors the power capacitor in the working state The vibration parameters are detected to obtain the detection data. The vibration detection data is the surface vibration acceleration signal. At the same time, the measurement point number of the detection amount, the sensitivity of the wireless laser vibration sensor, the sampling frequency and the collection method are recorded, and the collected data is wirelessly transmitted to the GPS for synchronous monitoring. After the time sampling module performs synchronous time synchronization sampling, it calculates the static data of synchronous detection, including the peak value and effective value of the capacitor surface vibration. After the calculation is completed, it is transmitted to the remote management and monitoring terminal for analysis and diagnosis. The remote management and monitoring terminal for analysis and diagnosis is set with a threshold value for the peak-to-peak value of the surface vibration data of the power capacitor. Compared with the set vibration signal alarm threshold, if it exceeds the alarm threshold, alarm processing will be performed, and the detection data at this time and the detection data within 10 minutes before and after the alarm will be stored separately as abnormal analysis data. Analysis and diagnosis The remote management monitoring terminal stores all detection data and forms graphical waveform data, which is conducive to trend analysis, operation status prediction and alarm.

Claims (1)

1. a power capacitor vibration on-line monitoring device, it is characterized in that it comprises following ingredient: some vibration monitoring sensors (2), sampling module during synchronous couple of GPS, data collection process base station and analyzing and diagnosing telemanagement monitor terminal, described some vibration monitoring sensors (2) are identical with the quantity of some shell surfaces (1) of power capacitor, each vibration monitoring sensor (2) is arranged on each shell surface (1), vibration monitoring sensor (2) is fitted and connected by the shell of magnet base and power capacitor, each vibration monitoring sensor (2) has unique address, during synchronous with GPS pair of the output terminal of some vibration monitoring sensors (2), the input end of sampling module connects, during synchronous with GPS pair of vibration monitoring sensor (2) between sampling module for wireless transmission connects, wireless transmission is Bluetooth transmission, during synchronous couple of GPS, the output terminal of sampling module is connected with the input end of data processing station, the output terminal of data processing station is connected with analyzing and diagnosing telemanagement monitor terminal, be connected for the transmission of 3GHz wireless network between described data collection process base station with analyzing and diagnosing telemanagement monitor terminal, data transmission is carried out by international communication agreement IEC60850 between described data collection process base station and analyzing and diagnosing telemanagement monitor terminal, analyzing and diagnosing telemanagement monitor terminal is corresponding with the control end of power capacitor to be connected, vibration monitoring sensor (2) is set to wireless laser vibration transducer, the acquisition mode of wireless laser vibration transducer is the interval automatic continuously collection mode of 5 minutes or carries out manual command's triggering mode simultaneously, described vibration monitoring sensor (2) obtains detection data for carrying out vibration detection to power capacitor, detect when data sampling modules in time radioing to synchronous couple of GPS carries out synchronous pair and be transferred to data collection process base station after sampling processing, computing is carried out to the Monitoring Data gathered in data collection process base station, obtain the static data of monitoring parameter, comprise the peak-to-peak value of the vibration signal of shell surface (1), effective value and harmonic value, the static data obtained passes to analyzing and diagnosing telemanagement monitor terminal, judge and send corresponding operating instruction to control power capacitor to power capacitor vibrational state by analyzing and diagnosing telemanagement monitor terminal, realize Real-Time Monitoring and control, data collection process base station is arranged in transformer station, data collection process base station comprises signal acquisition module and signal conditioning circuit, during synchronous couple of GPS, the output terminal of sampling module is connected with signal acquisition module and signal conditioning circuit successively, signal acquisition module is used for carrying out analog/digital conversion and data transmission to the Monitoring Data gathered, signal conditioning circuit is used for carrying out filtering to the data of transmission, amplify and conversion, signal acquisition module is transferred to signal conditioning circuit after the Monitoring Data of collection is carried out analog/digital conversion, signal conditioning circuit is used for carrying out filtering to the data of transmission, amplify and conversion process, described analyzing and diagnosing telemanagement monitor terminal is provided with main control system, main control system receives static data and stores static data, treatment and analysis, and to judge power capacitor vibrational state according to the result of process and send corresponding operating instruction report to the police to power capacitor and control.