Mutual inductor on-line monitoring method for transforming plant high pressure measurement
A voltage transformer and high-voltage measurement technology, applied in the measurement of electrical variables, instruments, measuring devices, etc., can solve problems such as shortening inspection time, wasting money, and changing transformer errors, and improving the anti-interference ability.
Active Publication Date: 2012-07-18
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology
The following problems still exist in the actual work of metrological verification: the transformers that have been verified have error changes; the power system requires that the inspection time be shortened as much as possible; the laboratory and field inspection results are very different (the two loads are different and the environment is different) ;Large workload of offline detection and poor real-time performance
Both have proposed an open online monitoring that combines wired and wireless technologies, but there is no unified on-site collection and communication system. The monitoring of a device requires a collection and monitoring workstation, which requires a large investment and waste of money. Daily operation and maintenance Heavy workload
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[0069] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.
[0070] see figure 1 As shown, it is the topological structure diagram of the corresponding online monitoring in the transformer substation high-voltage metering online monitoring method of the present invention; the first layer is a plurality of sensor units 1, the second layer is a plurality of online monitoring terminals 2, and the third layer is Station side monitoring station 3 and the fourth floor are bureau side monitoring master station 4. The sensor for extracting current signal adopts isolated, core-through Hall current sensor; the sensor for extracting voltage signal adopts isolated and stable voltage sensor, which is installed at the terminal The remaining space inside the box; to measure the mechanical characteristics of the high-voltage circuit breaker, the vibration sensor can be installed on...
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The invention relates to a transformer on-line monitoring method for high voltage measurement of a substation. The method comprises the following steps: step a: a plurality of sensor units are utilized for completing the transformation function of on-line collection signals of a plurality of transformers of the substation for the high voltage measurement; the obtained values comprise the secondary voltage drop value of a high-voltage voltage transformer, the secondary outlet voltage of the high-voltage voltage transformer, the current of a main loop of the high-voltage voltage transformer andthe voltage and the current of a secondary side loop of a high voltage current transformer; step b: the signal conditioning, the analog-to-digital conversion and the data calculation are carried out by an on-line monitoring terminal, the digital signal transmission is further carried out, the calculation result and the waveform data are uploaded; step c: the communication management, the data processing, the analysis and the diagnosis of the on-line monitoring terminal which is under the jurisdiction are completed by a station side monitoring station, and the related data is uploaded to a bureau side monitoring main station; and step d: the bureau side monitoring main station completes the storage, the inquiry and the maintenance of the data, as well as the communication with other systems.
Description
technical field [0001] The invention relates to a method for on-line detection of high-voltage electrical equipment, and in particular to an on-line solution to the accuracy and calibration problems of metering transformers used on site. Including: voltage transformer secondary voltage drop online test, voltage transformer secondary load online test, current transformer secondary load online test, voltage transformer error online test, current transformer error online test, insulation online test method. Background technique [0002] Since the current regular maintenance system commonly implemented in the power system is no longer suitable for the needs of power system reform and development and the requirements of power users for power supply reliability, power companies have urgently needed to implement more advanced condition-based maintenance in the world, that is, according to the equipment The operating status determines whether and how to maintain, and on-line monitor...
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IPC IPC(8): G01R35/02
Inventor 钱冠军钱进王龙华肖东姚胜红余禾田吴巍张东辉王蔚
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST