An emergency control method for thermal power units to deal with group off-grid failures of fans

Abstract

The invention provides a thermal power unit emergency control method for a blower group offline fault. The method comprises the steps of determining a blower offline total amount PLWG total of a wind farm, determining an available spinning reserve total amount PARS total of a thermal power unit, judging the starting condition of a thermal power unit emergency power lifting strategy, determining the emergency power lifting amount of the thermal power unit, and executing an emergency power lifting command by using the thermal power unit. The method is used in a group blower offline fault, the mechanical power of the unit can be rapidly and accurately raised, the adverse effects on the system caused by blower offline are reduced, and the insufficiency that a regulation range only based on one frequency modulation of the unit is small and time delay is large and the accuracy is poor in a scheduler artificial scheduling mode in the past is made up.

Description

technical field [0001] The invention relates to a method in the technical field of electric power system stability control, in particular to an emergency control method for a thermal power unit in response to group off-grid faults of wind turbines. Background technique [0002] With the increasingly prominent energy and environmental issues, the large-scale development and utilization of renewable energy, especially wind energy, has been strengthened. Wind power and thermal power "bundled" delivery is an important feature of wind power development in areas with insufficient hydropower resources. According to the analysis of the output characteristics of wind power bases, the construction of a certain scale of conventional thermal power units can not only meet the requirements of wind power output peak-shaving output change rate, Moreover, it can meet the needs of power regulation and control in the electricity market at the receiving end. [0003] The occurrence of too many...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides an emergency control method for thermal power units to cope with group off-grid faults of wind turbines, which can quickly and accurately increase the mechanical power of the unit and reduce the The negative impact of the wind turbine off-grid on the system can make up for the shortcomings of the small frequency adjustment range of the unit and the large and inaccurate time delay of the dispatcher's manual dispatching method in the past.

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