Control method of photovoltaic power station inverter under power rationing condition

Abstract

A control method of a photovoltaic power station inverter under the power rationing condition includes steps of 1) acquiring the actual total output power and the lowest total output power of this moment and rated output power, accumulative start-stop times and current theoretical output power parameters of various photovoltaic inverters when a power control processing module receives dispatched planned total output power or self-checks at fixed time; 2) starting and stopping the photovoltaic inverters automatically according to strategies and adjusting active power; 3) comparing current real-time total output power with the dispatched planned total output power of the photovoltaic power station, turning to step 5) if difference falls in the allowable error, or turning to step 1), and turning to step 4) if repeated times exceed the preset time; 4) notifying operation and maintenance staff of failure in automatic adjustment within the preset times in a warning manner, and turning to step 5); 5) storing control processes and results in historical records by the power control processing module.

Description

technical field [0001] The invention belongs to the technical field of green energy power generation, and in particular relates to a control method for an inverter of a photovoltaic power station under power-limited working conditions. Background technique [0002] In recent years, domestic photovoltaic and other new energy power stations have developed particularly rapidly, but due to problems such as on-site consumption and delivery difficulties, a large amount of power generation has been wasted and cost consumed. Therefore, the power dispatching department of the power grid company often requires some photovoltaic power stations to operate with limited power . [0003] At the same time, photovoltaic inverters have operating parameters to operate with a minimum output power. When the limited output power is low, measures must be taken to reduce the active power and shut down the inverter; when the limited output power is increased, the active power must be increased or t...

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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