Control system and implementation method for photovoltaic power station to participate in primary frequency modulation

Abstract

The invention provides a control system and implementation method for a photovoltaic power station to participate in primary frequency modulation. The control system is composed of a signal acquisition unit, a primary frequency modulation processing unit, an active power calculation unit, an active power distribution unit, a telecontrol communication unit, a wave recording unit, a frequency disturbance unit, an inverter control unit and other modules. According to the invention, for the actual characteristics of new energy photovoltaic power generation, the photovoltaic power station participates in primary frequency modulation of a power grid through station-level active power optimization control; when the system frequency fluctuates and crosses a threshold, the output of an inverter isincreased or decreased; without adding an additional energy storage device, the photovoltaic power station quickly participates in primary frequency modulation within a certain period of time to maximize the role of the inverter; the frequency change amplitude of the system is reduced, participation in rapid recovery of the frequency of the power grid is realized; and the system and method are applicable for the photovoltaic power station to participate in primary frequency modulation of the system..

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a method for realizing a photovoltaic power station participating in primary frequency regulation. Background technique [0002] Grid frequency is one of the three major indicators of power quality, and maintaining grid frequency stability is an important task for power system operation. In recent years, my country's new energy power generation has developed rapidly, among which solar photovoltaic power generation grid-connected installed capacity and power generation have grown rapidly, and its proportion in my country's various power installed capacity is also increasing. Photovoltaic power generation has the characteristics of randomness and intermittency. With the increase of power generation, it also brings great hidden dangers to the stable operation of the grid. Therefore, in addition to participating in the secondary frequency regulation of the p...

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Problems solved by technology

[0005] In order to solve the limitations of single machine participation in the existing primary frequency modulation technology, how to cooperate with primary frequency modulation and secondary frequency modulation, etc., the present invention discloses a realization method for photovoltaic power plants to participate in primary frequency modulation control

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