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Dielectric loss on-line monitoring device for 35kV high voltage parallel connection power capacitor group

A technology of power capacitors and monitoring devices, applied in measuring devices, measuring resistance/reactance/impedance, instruments, etc., can solve the threat to the personal safety of 500kV power equipment safe operation and maintenance personnel, affect the normal and stable operation of the power grid, active and reactive power losses Increase and other problems to achieve the effect of less calculation value, saving memory space, and reducing maintenance costs

Inactive Publication Date: 2014-10-22
STATE GRID CORP OF CHINA +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, 35kV high-voltage shunt capacitor banks often experience capacitor damage or even group explosion and group injury during daily operation. Fluctuation, active power and reactive power loss increase, and the service life of capacitors is reduced, affecting the normal and stable operation of the power grid

Method used

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  • Dielectric loss on-line monitoring device for 35kV high voltage parallel connection power capacitor group
  • Dielectric loss on-line monitoring device for 35kV high voltage parallel connection power capacitor group
  • Dielectric loss on-line monitoring device for 35kV high voltage parallel connection power capacitor group

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Embodiment Construction

[0026] Depend on Figure 1-5 It can be seen from the shown embodiment that it includes the first to ninth current sensors, current conversion circuit, voltage conversion circuit, analog-to-digital conversion module, microprocessor, display, keyboard and power supply module; the first to ninth current sensors They are installed respectively at the bottom of the bushings of high-voltage shunt capacitors that need to detect capacitance; the output terminals of the first to ninth current sensors are respectively connected to the corresponding input terminals of the current conversion circuit; the input terminals of the voltage conversion circuit are connected to high voltage The output terminal of the voltage transformer in the discharge coil of the parallel capacitor bank; the output terminals of the current conversion circuit and the voltage conversion circuit are respectively connected to the corresponding input terminals of the analog-to-digital conversion module; the output te...

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Abstract

The invention discloses a dielectric loss on-line monitoring device for a 35kV high voltage parallel connection power capacitor group. The device includes first to ninth current sensors, a current transformation circuit, a voltage transformation circuit, an analog-to-digital conversion module, a microprocessor, a display, a keyboard and a power module, and has the beneficial effects that by use of the device, the running state of the power capacitor group can be known without a power cut, and adverse effects of an equipment power cut on clients and power supply reliability are reduced. The dielectric loss on-line monitoring device in the invention well conforms to operation and overhaul conditions of a power capacitor group, thereby improving monitoring effectiveness; the device can reflect the running state of the power capacitor group in real time, plays a very good role in discovering hidden dangers in time, preventing power supply accidents, and ensuring safe power supply, and overcomes blindness brought by a traditional preventive test; and one-time FFT computation can obtain harmonic wave values of all orders of two channels, computed values are reduced, and engineering requirement for speediness, accuracy and real-time analysis in power quality monitoring are well met.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power capacitor monitoring in power systems, and relates to an on-line dielectric loss monitoring device for a 35kV high-voltage parallel power capacitor bank. Background technique [0002] The high-voltage shunt capacitor bank device is an extremely important reactive power source in the current power system, and it plays a pivotal role in improving the structure of the power system and improving the quality of power. The main function is to provide reactive power for the power system, reduce line loss, improve voltage quality, and increase equipment utilization. As a kind of reactive power compensation equipment, power capacitors usually adopt high-voltage centralized compensation in substations. The compensation capacitors are connected to the 10kV or 35kV bus of the substation to compensate the reactive power of all lines and transformers on the bus side of the substation. Cooperatin...

Claims

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Application Information

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IPC IPC(8): G01R27/26
Inventor 孙鹏付炜平杨立军祖树涛陈舒捷
Owner STATE GRID CORP OF CHINA
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