Method and system for controlling battery energy storage power station of supporting black start of light-preserved power generation system

Abstract

The invention provides a method and a system for controlling a battery energy storage power station of supporting black start of a light-preserved power generation system. The method comprises steps of obtaining power station data including power grid operation states, load types, photovoltaic output values, load power values and energy storage current transformer charged states; determining whether or not a power grid has a fault according to the power grid operation state; when the power grid has a fault, calculating the number of energy storage current transformers for charge-discharge power distribution according to the photovoltaic output values and load power values and using the current transformer power optimization principle; and establishing a light-preserved combined power generation output optimal objective function, and determining the power of each energy storage current transformer for charge-discharge power distribution according to the load power values, the photovoltaic output values and the charged states of the energy storage current transformers for charge-discharge power distribution. The invention achieves black start of a power grid through a battery energy storage system combined with a photovoltaic electric field when the power grid has a fault, and achieves control of stable operation of the power grid.

Description

technical field [0001] The invention belongs to the technical field of smart grid and energy storage, and in particular relates to a battery energy storage power station control method and system for supporting black start of a photovoltaic storage power generation system in a smart grid. Background technique [0002] As the scale of the cross-regional interconnection grid of the power system becomes larger and larger, the mutual influence between the subsystems becomes more and more intense, and the failure of a local system may cause a large-scale power outage due to incorrect actions of protection and automatic devices. Accidents, or even the collapse of the entire power system, have brought huge losses to the national economy. [0003] Black start means that after the entire power grid system is out of service due to a fault, without relying on other network assistance, through the start-up of units with self-starting capability, also known as black start capability in t...

AI Technical Summary

Problems solved by technology

[0002] As the scale of the cross-regional interconnection grid of the power system becomes larger and larger, the mutual influence between the subsystems becomes more and more intense, and the failure of a local system may cause a large-scale power outage due to incorrect actions of protection and automatic devices. Accidents, or even the collapse of the entire power system, have brought huge losses to the national economy

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