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Electric network transformer monitoring device and monitoring method

A monitoring device and transformer technology, applied in measuring devices, emergency protection circuit devices, measuring electrical variables, etc., can solve problems such as inability to evaluate and refer to transformers, inconvenience in judging the operating state of the entire power grid, and achieve safe and stable operation, reliable operation, and elimination of cumulative effect of error

Inactive Publication Date: 2008-08-06
NANJING INTELLIGENT DISTRIBUTION AUTOMATION EQUIP
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Problems solved by technology

[0004] The problem to be solved by the present invention is: the existing transformer monitoring cannot evaluate and refer to the state of different transformers of the same type at the same time, and it is not convenient to judge the operating state of the entire power grid

Method used

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  • Electric network transformer monitoring device and monitoring method
  • Electric network transformer monitoring device and monitoring method
  • Electric network transformer monitoring device and monitoring method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Grid transformer monitoring device of the present invention is installed on a substation main transformer (star-delta connection) that voltage level is 220kV, as shown in Figure 1, current transformer CT, voltage transformer PT and voltage, current signal acquisition The device is the power grid transformer monitoring device of the present invention. After the transformation of the current transformer CT and the voltage transformer PT, the high current and high voltage are changed into small current and low voltage, and the primary and secondary windings of the transformer are connected to the monitoring device to collect After the power signal is processed by the data processing unit in the device, on the one hand, the data is quickly sent to the local industrial computer through the USB2.0 interface, and on the other hand, the data is t...

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Abstract

An electric network transformer monitoring device comprises a data acquisition unit, a communication unit, a data processing unit, a control unit and a power supply unit, wherein the data acquisition unit consists of a filter circuit, a sampling circuit and a GPS timing circuit. The monitoring method provided by the invention applies unified time labels on the acquired transformer parameters through the GPS timing circuit of each electric network transformer monitoring device, transmits the monitored transformer parameters to an electric network dispatching center, judges and positions the internal faults of each transformer winding in the electric network, carries out the voltage stability analysis of the whole electric network according to the state of each transformer at the same time, reliably guarantees the safe and stable operation of local electric networks, and realizes the real-time monitoring of the wide-area electric network.

Description

technical field [0001] The invention belongs to the field of microcomputer relay protection, in particular to a monitoring device and a monitoring method for a power grid transformer with a voltage level of 66kV or above. Background technique [0002] The power transformer is one of the most critical equipment in the power system. It undertakes voltage conversion, current distribution and transmission, and provides power services. Therefore, the normal operation of the transformer is an important guarantee for the safe, reliable, high-quality and economical operation of the power system, and it is necessary to prevent and reduce the occurrence of transformer failures and accidents to the greatest extent. The traditional methods of collecting transformer status information are visual inspection, physical and chemical testing, high-voltage electrical tests and relay protection, which can only provide lagging information after a transformer failure or ac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00H02H7/04
Inventor 徐建源张海龙王博闫鸿魁
Owner NANJING INTELLIGENT DISTRIBUTION AUTOMATION EQUIP
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