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Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information

A technology of subsynchronous oscillation and synchronous oscillation, applied in the field of electric power, can solve problems such as lack of detection of subsynchronous oscillation

Active Publication Date: 2009-04-15
BEIJING SIFANG JIBAO AUTOMATION +1
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  • Abstract
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Problems solved by technology

At present, the power plant and the power grid operation department still lack the technical means to detect subsynchronous oscillation. This patent provides a measure and method for multi-level monitoring subsynchronous oscillation of the combined power plant control center and grid control center.

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  • Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information
  • Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information
  • Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information

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Embodiment Construction

[0020] The technical solutions of the present invention will be further described in detail through preferred embodiments with reference to the accompanying drawings.

[0021] figure 1 It shows the system wiring diagram of a power plant composed of 4 large-capacity turbogenerators supplying power to the grid through a double-circuit transmission line with series compensation capacitors. The generator set is composed of 4 concentrated masses and 3-section shafts. The series compensation capacitor or other power equipment causes subsynchronous resonance in the power system. Therefore, if figure 1 As shown, install the generator set shafting torsional vibration protection device (TSR) in each unit of the power plant, install the bypass control in the substation where the series compensation capacitor or other power electronic equipment that may cause SSO / SSR are installed on the grid side The generator set shaft torsional vibration protector (TSR) is connected to the bypass con...

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Abstract

The invention relates to a safety monitoring measure of sub-synchronous oscillation / resonance (SSO / SSR) in an electric power system, and discloses a sub-synchronous oscillation multi-level monitoring method of identifying the sub-synchronous oscillation and adopting control and protective measures by a power plant side in coordination with a power grid side. The method comprises the following steps: arranging a unit shafting torsional stress relay (TSR) and a bypass controller in the power plant and the power grid; adequately utilizing the characteristic that the TSR has the highest sensitivity of detecting the sub-synchronous oscillation; identifying different stages of the sub-synchronous oscillation by the TSR setting; adopting different measures including a power plant side warning, bypass serial compensation capacitor or other power electronic devices on the power grid side and removing a set from the power plant according to the different stages of the sub-synchronous oscillation. The method can smartly and accurately identify the sub-synchronous oscillation in the power plant and the power grid, determine the corresponding strategy and measures according to the extent of damage of the sub-synchronous oscillation, and provide an effective method for the power plant and the power grid to harmoniously monitor the sub-synchronous oscillation.

Description

technical field [0001] The invention relates to the application fields of electric power system, large-scale thermal power plant, series compensation transmission, direct current transmission and electric power electronic technology, and electric power field related to power system subsynchronous oscillation (SSO / SSR). Background technique [0002] Large-scale thermal turbine technology is one of the key equipment of major equipment in my country. The shafting of high-power units has the characteristics of light weight and flexibility, multiple supports, large span, and high power density. The utilization factor of generator materials is improved, and the cross-sectional power of the shafting The density is relatively increased, the lengthening of the shaft system reduces the torsional stiffness, the natural frequency spectrum of the shaft system is relatively dense, and the energy induced by vibration is low; at the same time, the ultra-high voltage long-distance transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00G01R31/00H02H7/22
CPCY04S10/20Y02E60/725Y02E60/00
Inventor 焦邵华张涛刘全郑巍
Owner BEIJING SIFANG JIBAO AUTOMATION
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