Method for controlling photovoltaic power station inverter under limited power conditions

Abstract

Disclosed is a method for controlling a photovoltaic power station inverter under limited power conditions. The method comprises a first step of obtaining actual output total power and theoretical minimum output total power at the moment, and rated output power, cumulative start and top times and current theoretical output power parameters of each photovoltaic inverter when a power control processing module receives dispatched planned output total power or timed auto inspection; a second step of automatically starting and performing active power regulation for the photovoltaic inverters according to strategies; a third step of comparing the current real-time output total power and the dispatched planned output total power, if the difference is within an allowed range, then going to a fifth step, otherwise returning back to the first step, and if the number of cycles in this round exceeds a preset number of times, then going to a fourth step; the fourth step of informing maintenance personnel in an alarm way that automatic regulation fails in the preset number of times, and going to the fifth step; and the fifth step of the power control processing module saving the control process and results in the form of history.

Description

Technical field [0001] The invention belongs to the technical field of green energy power generation, and in particular relates to a control method of a photovoltaic power station inverter under power-limited working conditions. Background technique [0002] In recent years, domestic photovoltaic and other new energy power stations have developed extremely rapidly, but due to problems such as local absorption and transmission difficulties, a large amount of power generation was wasted and cost consumption. Therefore, the power dispatching department of grid companies often requires limited power operation of some photovoltaic power stations. . [0003] At the same time, the photovoltaic inverter has the operating parameters of the lowest output power. When the restricted output power is low, measures must be taken to reduce the active power and shut down the inverter; when the output power is restricted to increase, the active power must be adjusted up or it may be necessary to re...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a control method for photovoltaic power station inverters under power-limited conditions. Using the photovoltaic power station monitoring system, the principles of remote control, remote control and as little control as possible are used to control the photovoltaic inverter. Automatic control, which solves the problem that when the photovoltaic power plant is at the critical point of the minimum output power condition, the photovoltaic inverter faces multiple start-stops and requires manual intervention

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