Control method of distributed photovoltaic power generation system for coal-to-electricity project

Abstract

The invention relates to a power engineering technology, and specifically relates to a control method of a distributed photovoltaic power generation system for the coal-to-electricity project. The control method comprises the steps of selecting nodes with high sensitivity in branches of a distribution network to serve as nodes for installing the distributed photovoltaic power generation system; selecting the time when the load of the distribution network is the highest by using a reactive power and voltage regulation capability of the distributed photovoltaic power generation system, taking the minimum node voltage deviation of the distribution network and the minimum reactive power capacity of the distributed photovoltaic power generation system as an objective function, and solving the optimal installed capacity of the distributed photovoltaic power generation system according to a genetic algorithm; calculating the output of the distributed photovoltaic power generations system by taking the minimum voltage deviation and the maximum active power output and the minimum reactive power output of the distributed photovoltaic power generation system as an objective function through the genetic algorithm according to power data of the distributed photovoltaic power generation system and data of user load; and correcting the distributed photovoltaic output through monitoring powerdata of the distribution network nodes. The method effectively solves a problem of out-of-limit voltage of the low-voltage distribution network, and reduces the cost of the coal-to-electricity project.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a control method for a distributed photovoltaic power generation system oriented to a coal-to-electricity project. Background technique [0002] As one of the important means of air pollution control, it is necessary to accelerate the "coal-to-electricity" project in the urban-rural fringe and rural areas, specifically to use electric heaters for heating instead of the original local heating and small boiler heating methods based on raw coal burning . [0003] It is worth noting that the substantial increase in load caused by the "coal-to-electricity" project will cause the voltage of the low-voltage distribution network to exceed the lower limit, which requires a large-scale upgrade of the distribution network frame, resulting in a large amount of investment in the power grid. It has brought certain resistance to the advancement of the "coal-to-el...

AI Technical Summary

Problems solved by technology

[0003] It is worth noting that the substantial increase in load caused by the "coal-to-electricity" project will cause the voltage of the low-voltage distribution network to exceed the lower limit, which requires a large-scale upgrade of the distribution network frame, resulting in a large amount of investment in the power grid. It has brought certain resistance to the advancement of the "coal-to-electricity" electric energy replacement project

Images