Operation safety adaptive evaluation method for thermal power generating unit in primary frequency modulation performance test

Abstract

The invention discloses an operation safety adaptive evaluation method for a thermal power generating unit in a primary frequency modulation performance test and belongs to the field of power system automatic control. The method comprises three evaluation submethods: unit steady-state characteristic estimation, unit dynamic characteristic estimation and unit low-frequency oscillation risk evaluation. The method guarantees that the applied disturbance amplitude for the primary frequency modulation performance test of the thermal power generating unit is limited within a safety bound of the unitaccording to the WAMS data, uploaded by a power plant through a PMU, through state comparison, model simulation, parameter identification and disturbance testing and simulation, thereby avoiding thepower oscillation, combustion instability and big vibration of the unit in a testing process, and effectively guaranteeing the power generation safety.

Description

technical field [0001] The invention relates to a method for evaluating the safety adaptability of unit operation in the primary frequency regulation performance test of thermal power units, belonging to the field of automatic control of electric power systems. Background technique [0002] In order to make the power grid dispatching more comprehensive and accurately grasp the current primary frequency regulation capability and model parameter accuracy information of the unified dispatching unit in real time, and improve the monitoring and evaluation of the power grid’s operation status and adjustment capability of thermal power units, more and more provinces have launched A test job for FM performance. However, since a frequency regulation test belongs to the disturbance test performed by power grid dispatching on the generator set, if the disturbance test is carried out rashly without knowing the operating environment, operating state, and operation safety risks of the uni...

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Problems solved by technology

[0008] The above-mentioned existing technologies aim at the primary frequency regulation performance index of the generator set, and comprehensively evaluate the primary frequency regulation performance of the generator set, but there is no assessment of the safety adaptability of the unit operation, and it cannot guarantee that the disturbance amplitude imposed by the primary frequency regulation performance test of the thermal power unit can be limited to the safety of the unit. Therefore, it is impossible to prevent the power oscillation, combustion instability, main machine vibration and other consequences of the unit during the test

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