Wind power integration on-line safety early warning system based on short-term wind power prediction

Abstract

The invention discloses a wind power integration on-line safety early warning system based on short-term wind power prediction. The system reads required wind power actually measured data from an EMS (Enhanced Message Service) system, and stores the wind power actually measured data in a power grid database; a wind power prediction module reads current wind power station output from the power grid database, carries out prediction by using the current wind power station output as an input quantity and historical data as a correction quantity to obtain wind power prediction range of the next time window, and also carries out estimation on wind energy quality of a wind power station; and the prediction range and the estimation result are stored in the wind power database and are displayed through a human-computer interface. A wind machine dynamic model and a power grid model are established in an on-line computing analysis engine, the analysis engine reads power grid section from the EMSsystem, and reads wind power prediction values from the wind power database so as to carry out on-line load flow calculation of the power grid including the wind power station to obtain a trend curveof all indexes related with the power grid safety and carry out out-of-limit comparison for judging the out-of-limit condition and warning.

Description

technical field [0001] The invention relates to a wind power grid-connected line safety early warning system, in particular to a wind power grid-connected online safety early warning system based on short-term wind power prediction. Background technique [0002] In recent years, due to its excellent unit performance, variable-speed constant-frequency generator sets based on double-fed induction motors have become the mainstream models selected by wind farms and have been widely used and paid attention to. Domestic research mainly focuses on wind farm modeling, unit performance optimization, and wind farm power generation planning, while issues concerning the safe and stable operation of the power grid include the optimal configuration and adjustment of reactive power compensation for multiple wind farms considering the output characteristics of wind turbines. Considering the wind power grid-connected area security control strategy formulation and secondary equipment optimiza...

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Problems solved by technology

Domestic research mainly focuses on wind farm modeling, unit performance optimization, and wind farm power generation planning, while issues concerning the safe and stable operation of the power grid include the optimal configuration and adjustment of reactive power compensation for multiple wind farms considering the output characteristics of wind turbines. Considering the wind power grid-connected area security control strategy formulation and secondary equipment optimization cooperation considering the wind power protection control logic, as well as the online power flow calculation and safety warning of the power grid considering the wind power fluctuation, due to the lack of effective and authoritative simulation analysis tools, relevant Research has rarely been reported

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