Online monitoring method of reactive power control capability of wind power plant

Abstract

The invention discloses an online monitoring method of a reactive power control capability of a wind power plant. The method comprises the following steps: firstly, constructing a wind power plant reactive power control capability aggregation evaluation model in combination with wind power plant operation state information measured by a field measurement mutual inductor; then selecting a relatively small reference point to update a threshold parameter based on previous application experience to construct a wind power plant reactive power control capability online monitoring model; on the basisof the above model, according to related operation data accumulated step by step, fitting a quantitative relation of evaluation errors and evaluation time consumption in a daily operation scene of the wind power plant with respect to threshold parameters through a data driving method; and finally, constructing a reference point updating threshold parameter optimization model and solving to obtainan optimal value for evaluating a dynamic updating threshold of a reference point so as to realize an optimal operation effect of the wind power plant reactive power control capability online monitoring model.

Description

technical field [0001] The invention belongs to the field of reactive power optimization control of grid-connected voltage generated by renewable new energy, and specifically relates to an online monitoring method for reactive power control capability of a wind farm. Background technique [0002] Among the many challenges faced by large-scale development and utilization of renewable energy, voltage stability is particularly prominent. Further improving the reactive power and voltage management capabilities of renewable new energy power grid-connected systems is an important content and necessary condition for building a strong smart grid. At present, most renewable new energy power generation bases maintain unit power factor operation, that is, they do not exchange reactive power with the outside world. Influenced by fluctuations, the voltage stability problem of the power system containing renewable new energy will become more and more serious. Therefore, as a potential re...

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Problems solved by technology

At present, most renewable new energy power generation bases maintain unit power factor operation, that is, they do not exchange reactive power with the outside world. Influenced by fluctuations, the voltage stability problem of the power system containing renewable new energy will become more and more serious. Therefore, as a potential reactive power source of the system, the renewable new energy power generation base must participate in the comprehensive reactive power adjustment and adjustment of the system. voltage control system

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