Anti-oscillating self-adaptive restraining system of subsynchronous oscillation of large-size generator set

Abstract

The invention provides an anti-oscillating self-adaptive restraining system of subsynchronous oscillation of a large-size generator set. The anti-oscillating self-adaptive restraining system of the subsynchronous oscillation of the large-size generator set comprises a signal measurement control system and a static var compensator system, wherein the signal measurement control system is used for enabling measured torsional mode components of the large-size generator set to be through the processing of measurement, inverse amplification, lowpass filtering and self-adaptive control parameter generation in sequence to obtain a needed control signal and enabling the control signal to be input into the static var compensator system, the static var compensator system is used for controlling a triggering angle according to the control signal generated by the signal measurement control system so as to adjust equivalent admittance of the static var compensator system, then reactive power output by the static var compensator system is changed in a self-adaptive mode, corresponding damping torque is generated, and accordingly self-adaptive restraining of the subsynchronous oscillation of the large-size generator set is achieved. The anti-oscillating self-adaptive restraining system of the subsynchronous oscillation of the large-size generator set is capable of better restraining the occurrence of the subsynchronous oscillation of the large-size generator set.

Description

technical field [0001] The invention relates to the field of stability control of large generating sets, in particular to an anti-oscillation self-adaptive suppression system for subsynchronous oscillation of large generating sets. Background technique [0002] The "west-east power transmission" power pattern formed by the uneven distribution of energy in my country has made the length of my country's power grid transmission lines continue to increase. Long-distance power transmission often produces more power loss and reduces power transmission efficiency. As the best choice to solve this problem, the series compensation device has the advantages of less land occupation, simple operation, and low cost, but it may cause subsynchronous oscillation problems in large generator sets. [0003] Subsynchronous oscillation is produced by a special electromechanical coupling in the power system, which may be caused by the common series compensation device mentioned above, or by the ...

AI Technical Summary

Problems solved by technology

However, the selection of static var compensator control parameters is highly dependent on the mathematical model of the system, and the control parameters are usually fixed values ​​selected for a specific operating condition. The ideal suppression effect is often not achieved in the actual power system

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