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Subsynchronous oscillation monitoring method and device

A sub-synchronous oscillation and sub-synchronization technology, applied in the field of electrical signal processing, can solve the problem that the sub-synchronous oscillation endangers the safe operation life of the power grid and the generator set, and achieves the effect of avoiding safe operation and life.

Pending Publication Date: 2022-05-13
BEIFANG WEIJIAMAO COAL POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The existence of subsynchronous oscillation will endanger the safe operation and life of the power grid and generator sets. Therefore, how to monitor subsynchronous oscillation has become an urgent problem to be solved.

Method used

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  • Subsynchronous oscillation monitoring method and device
  • Subsynchronous oscillation monitoring method and device
  • Subsynchronous oscillation monitoring method and device

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Embodiment Construction

[0033] Implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time.

[0034] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application shall fall within the protection scope of the embodiments of the present application.

[0035] The specific implementation of the embodiment of the present application will be further described below in conjunct...

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Abstract

The embodiment of the invention provides a subsynchronous oscillation monitoring method and device. The subsynchronous oscillation monitoring method comprises the following steps: determining a subsynchronous component signal from a detected electric signal; calculating a subsynchronous comprehensive effective value according to the determined subsynchronous component signal; and judging whether subsynchronous oscillation occurs or not according to the calculated subsynchronous comprehensive effective value. According to the embodiment of the invention, whether subsynchronous oscillation occurs or not can be accurately monitored, so that subsequent targeted treatment is facilitated, and the safety operation and service life of a power grid and a generator set are prevented from being harmed.

Description

technical field [0001] The embodiments of the present application relate to the technical field of electrical signal processing, and in particular to a subsynchronous oscillation monitoring method and device. Background technique [0002] When the generator is connected to the system through a line compensated by series capacitance, if the series compensation degree is high, the electrical resonance frequency of the network is likely to resonate with the natural torsional vibration frequency of the shafting of the large turbogenerator, resulting in large shaft torsion of the generator. vibration damage. This resonant frequency is usually lower than the synchronous (50 Hz) frequency and is called subsynchronous oscillation. For high-voltage direct current transmission lines (HVDC) and static var compensators (SVC), subsynchronous oscillations may also be triggered when the control parameters are not selected properly. [0003] The existence of subsynchronous oscillation wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R23/16G01R21/00
CPCG01R19/0084G01R23/16G01R21/005
Inventor 索建琪郭磊王岩波王鑫齐建平杨月明解志宏李军虎王洋窦仁晖
Owner BEIFANG WEIJIAMAO COAL POWER CO LTD
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