Method and device for screening power oscillation caused by power system stabilizer abnormality

Abstract

The invention is suitable for the field of power generation and provides a method and device for screening power oscillation caused by power system stabilizer abnormality. The method comprises the steps of judging whether an operating state of a PSS is abnormal or not during power oscillation of a unit; if not, determining that the power oscillation of the unit is not caused by abnormal operation of the PSS; if so, judging whether output of the PSS plays a negative damping role in oscillation or not; if so, determining that the power oscillation of the unit is caused by abnormal operation of the PSS; and if not, determining the power oscillation of the unit is not caused by abnormal operation of the PSS. According to the method and the device, whether the PPS in the power oscillation of a generator normally operates or not can be effectively analyzed and whether the output of the PSS plays the negative damping role in oscillation or not can be effectively analyzed, so that the root cause of the power oscillation of the generator is found out, a basis is provided for formulating a solving scheme, a hidden danger of oscillation of the unit is timely eliminated, manpower and material output for taking special monitoring measures on the oscillation unit is avoided, and meanwhile, safe operation of a power grid is also ensured.

Description

technical field [0001] The invention belongs to the field of power generation, and in particular relates to a method and device for troubleshooting power oscillation caused by an abnormality of a power system stabilizer. Background technique [0002] Ling Ao Phase II Power Plant experienced power oscillation on December 29, 2011 and June 26, 2012. Due to the large amplitude, it poses a threat to the safety of power plant equipment and power grids, and there is a nuclear safety risk. Therefore, it is urgent to be able to control Ling Ao The method of accurately analyzing and locating the cause of the power oscillation of the second-phase unit, so as to formulate a targeted solution, eliminate the hidden danger of unit oscillation, and ensure the safety of nuclear power. [0003] Since the abnormal operation of the PSS (Power System Stabilizer) is likely to cause power oscillation, but it is not the inevitable cause of power oscillation, whether the power oscillation of the mo...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a troubleshooting method for power oscillation caused by abnormality of the power system stabilizer, aiming to solve the existing problem that it is impossible to effectively determine whether the power oscillation of the unit is caused by the abnormal operation of the PSS

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