Power generation power forecasting method and system by taking power generation units as basic prediction units

Abstract

The invention discloses a power generation power forecasting method and a power generation power forecasting system by taking power generation units as basic prediction units. The method comprises the following steps of: acquiring parameters at each power generation unit by using data acquisition equipment such as a sensor; taking the parameters as input state variables; meanwhile, reading an output power value of each power generation unit and taking the output power value as an output state variable; establishing a corresponding association database aiming at each power generation unit respectively; acquiring a corresponding power generation power prediction value by using the association database; and then accumulating the power prediction value of normally working power generation unit so as to obtain the power generation power prediction value of an entire photovoltaic power station. The method has the beneficial effects that: the power generation unit corresponding to each inverter is used by the provided power generation power prediction system as the basic prediction unit; the system is applicable to different installation and operation modes, including fixed installation, single-shaft tracking, double-shaft tracking, focusing installation and the like; and the power generation units form the power generation power prediction system of the photovoltaic electric station in a hybrid mode or the power generation units of a single installation and operation mode form the power generation power prediction system of the photovoltaic electric station.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and provides a power generation prediction system for a photovoltaic power station with a power generation unit as the basic prediction unit, which is suitable for power generation in a photovoltaic power station composed of a mixture of power generation units in different installation methods or a single installation method of power generation units power prediction. Background technique [0002] Grid-connected photovoltaic power plants have become an important application form of photovoltaic power generation. Since large-scale grid-connected photovoltaic power plants are generally not equipped with energy storage equipment, but start and shut down according to the day and night cycle, when factors such as light, temperature, time, and seasons change, their output power will show severe fluctuations and intermittences. sex. As more and more grid-connected photovoltaic po...

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Problems solved by technology

Fixed installation means that the photovoltaic array is fixed on the support structure and does not move with the change of the sun's position. This is the simplest installation method, but the photoelectric conversion efficiency is relatively low.

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