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[China Instrument Network Instrument R&D] On February 20th, it was learned from Jiangsu Zhenjiang Power Supply Company that the innovative results of the “ultrasonic sensor and capacitive steady-state on-line detection system and working method†developed by the company were granted the invention patent certificate issued by the State Intellectual Property Office. .
“The shunt power capacitor is one of the main electrical equipments in the substation, in addition to compensating reactive power of the system, improving the power factor of the system, improving the voltage quality, reducing the system line loss, and at the same time releasing the potential of the transformer and improving the power transmission capacity of the transmission line. Safe operation has important significance, but due to external factors such as ambient temperature, working temperature, working voltage, harmonics, and capacitor quality problems, capacitor damage accidents have occurred from time to time, which has seriously affected the normal operation of the power grid. It is particularly urgent and necessary to cause the hidden trouble of the capacitor to fail, and to take measures to reduce the occurrence of capacitor failure in a timely manner.†The person in charge of the power transformation and repair room of Zhenjiang Power Supply Company introduced.
To this end, the company's employees developed a system for on-line monitoring of capacitive states. Select partial discharge, voltage, current, and capacitance as key monitoring items, and use ultrasonic sensing technology, data acquisition technology, signal processing technology, computer technology, and network communication technology to perform on-line measurement of the partial discharge capacity and capacitance of the parallel capacitor to discover The early signs of insulation deterioration and quality defects occur, and the reliability of the capacitor is judged at any time based on the magnitude and trend of the monitoring data, so that potential faults can be detected early and an early warning can be provided.
The system is currently being used in trials of 10 substations such as the 110 kV road in Zhenjiang. By detecting partial discharge signals of high-voltage shunt power capacitors, information such as partial discharge type, partial discharge position, and partial discharge strength is given, so that the fault type, fault position, fault severity, etc. of the power capacitor are discriminated and passed on the basis of specific conditions. A variety of ways to give early warning, in order to achieve an effective early warning of power capacitor failure, and successfully detected the United Nations Transformer A phase 4 capacitor capacity increases and other electrical failures 6 items.
(Original title: Jiangsu Zhenjiang Power Supply Innovations Effective Early Warning Capacitor Failure)
“The shunt power capacitor is one of the main electrical equipments in the substation, in addition to compensating reactive power of the system, improving the power factor of the system, improving the voltage quality, reducing the system line loss, and at the same time releasing the potential of the transformer and improving the power transmission capacity of the transmission line. Safe operation has important significance, but due to external factors such as ambient temperature, working temperature, working voltage, harmonics, and capacitor quality problems, capacitor damage accidents have occurred from time to time, which has seriously affected the normal operation of the power grid. It is particularly urgent and necessary to cause the hidden trouble of the capacitor to fail, and to take measures to reduce the occurrence of capacitor failure in a timely manner.†The person in charge of the power transformation and repair room of Zhenjiang Power Supply Company introduced.
To this end, the company's employees developed a system for on-line monitoring of capacitive states. Select partial discharge, voltage, current, and capacitance as key monitoring items, and use ultrasonic sensing technology, data acquisition technology, signal processing technology, computer technology, and network communication technology to perform on-line measurement of the partial discharge capacity and capacitance of the parallel capacitor to discover The early signs of insulation deterioration and quality defects occur, and the reliability of the capacitor is judged at any time based on the magnitude and trend of the monitoring data, so that potential faults can be detected early and an early warning can be provided.
The system is currently being used in trials of 10 substations such as the 110 kV road in Zhenjiang. By detecting partial discharge signals of high-voltage shunt power capacitors, information such as partial discharge type, partial discharge position, and partial discharge strength is given, so that the fault type, fault position, fault severity, etc. of the power capacitor are discriminated and passed on the basis of specific conditions. A variety of ways to give early warning, in order to achieve an effective early warning of power capacitor failure, and successfully detected the United Nations Transformer A phase 4 capacitor capacity increases and other electrical failures 6 items.
(Original title: Jiangsu Zhenjiang Power Supply Innovations Effective Early Warning Capacitor Failure)