Review of frequency stability services for grid balancing with wind generation

The Journal of Engineering

James Boyle¹  Aoife Foley²  Timothy Littler³ 

[1]School of Electronics , Electrical Engineering and Computer Science, Queen&apos

[2]School of Mechanical and Aerospace Engineering , Queen&apos

[3]s University Belfast , Belfast , Northern Ireland

关键词: power system simulations;    conventional synchronous thermal generators;    renewable generation;    wind penetration levels increase;    natural inertia;    wind turbine generators;    modern variable speed WTG;    automatic generation control;    WTG power/speed control systems;    grid generation;    power electronic converters;    nonsynchronous generation;    grid balancing services;    robust frequency stability services;    wind generation;    WTG frequency response systems;    grid operators;    reliable frequency stability services;    grid frequency;    synchronous thermal generating units;    solar photovoltaic generation;    system nonsynchronous penetration levels;    nonsynchronous connection;    load/generation imbalance;    active power control;   

DOI  :  10.1049/joe.2018.0276

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Frequency stability in power systems is achieved by active power control, which aims to balance grid generation with load demand. Historically, grid balancing services have been provided by synchronous thermal generating units. As wind penetration levels increase on the power system, it is essential that wind turbine generators (WTGs) provide robust, reliable frequency stability services to grid operators. Like other forms of renewable generation such as solar photovoltaic generation, modern variable speed WTGs are connected to the power system using power electronic converters. This non-synchronous connection decouples the natural inertia of the WTG from the grid frequency. As system non-synchronous penetration levels increase, non-synchronous generation will be required to participate in frequency stability services such as automatic generation control. This study presents a review of WTG frequency response systems that allow WTGs to participate in frequency stability services by emulating the natural inertia and droop characteristics of conventional synchronous thermal generators. Power system simulations performed in MATLAB/Simulink show that the addition of emulated inertia and droop controllers into WTG's power/speed control systems can reduce the rate of change of frequency and increase frequency nadir when the power system is subject to a load/generation imbalance.

【 授权许可】

CC BY