New energy load control method for preventing power grid frequency fluctuation

Abstract

The invention relates to a new energy load control method for preventing power grid frequency fluctuation. The method comprises the following steps of calculating the sum P1 of active power of all generator sets in a new energy station, determining an active power instruction P0 and rated active power Pe of the current new energy station, calculating the active power change rate VP of the current new energy station, setting an active power change dead zone deltaP, calculating the absolute value |P1-P0| of the active power deviation, if |P1-P0| is greater than deltaP, enabling the generator set to increase or decrease the active power towards the P0 direction, and issuing an active power change instruction to the inverter at regular time until the absolute value of the active power deviation is smaller than an active power change dead zone deltaP. The method can reasonably calculate the load variation per minute according to the capacity of the new energy station, issues an instruction to a fan or an inverter according to a predicted mode, reasonably distributes the issuing interval and size of the load instruction, and finally completes the adjustment of the active power.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation, and relates to a new energy load control method, in particular to a new energy load control method for preventing grid frequency fluctuations. Background technique [0002] With the large-scale promotion of new energy technologies in my country, the proportion of new energy applications in the entire power grid is gradually increasing, and the power grid has put forward higher and faster power support and response requirements for new energy. [0003] New energy power generation is intermittent, and large-scale operation of new energy brings great challenges to the power grid. The new energy is connected to the power grid through the inverter of power electronics technology, which has the ability to quickly control the power. However, this access method has certain safety hazards: when the command reaches the inverter, the inverter starts quickly and follows the target. If th...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a new energy load control method that prevents grid frequency fluctuations, and solve the problem that the new energy mutation caused by the integration of large-scale new energy into the grid is too fast and affects the grid frequency.

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