Reduction of fluctuation of wind turbines’ output power by modeling and control

Other Title(s)

تخفيض تذبذب الطاقة الناتجة لتوربينات الرياح عن طريق النمذجة و التحكم

Dissertant

Ahmad, Ahmad Basim

Thesis advisor

Muhammad, Umar

University

Princess Sumaya University for Technology

Faculty

King Abdullah II Faculty of Engineering

University Country

Jordan

Degree

Master

Degree Date

2018

English Abstract

Energy efficiency and renewable energy resources such as solar power and wind power are integral parts of the solution to the worldwide climate change battle; not only to lessen the carbon dioxide emissions, but also to secure a clean energy resource for the future.

These two factors also have a positive impact on the economics of the energy sector.

Nonetheless, some issues still arise when implementing renewable energy projects for electrical generation; one of the obstacles resulting from the penetration of wind energy into power systems lies in the frequency variation or excursions resulting from the fluctuation of the generated output power of the wind turbines.

The issue of small signal stability has become an increasingly interesting point of research for power systems with wind energy penetration.

The stochastic nature of the wind as an energy source introduces new challenges for the control systems of other conventional power plants to track the load changes and preserve the frequency of the system.

However, the refinement of the frequency of power signals following renewable energy penetration may not be the duty of conventional power plants solely; wind turbine generator units can also contribute into the improvements of power output to be less fluctuated if advanced energy storage managing system is added.

This study shows the steps of the development of a simplified mathematical model using MATLAB / Simulink of a real wind turbine, which is located in Al-Fujeij, southern Jordan.

The wind turbine generator is owned by the Royal Scientific Society (RSS) / National Energy Research Center (NERC) and the generator type is synchronous with a capacity of 1.65MW.

The model is mixed between empirical equations and differential / integral equations to formulate the turbine-generator unit.

Simulation results over a wide range of operation for different sets of data have shown the validity of the proposed model and its suitability for power system frequency studies.

The some model parameters have been calculated based on technical specifications of the turbine system and industrial data supplied by RSS/NERC.

The study also suggests two algorithms of the smoothing of the output power using a control system for the wind turbine generator with Energy Storage System (ESS) in order to improve the power quality of the wind turbine.

For smoothing output power, the ESS will absorb or compensate the fluctuated power of the wind turbine.

Those algorithms and the obtained results are simulated using MATLAB.

The idea is based on developing a computer controlled battery manager that performs a repeated charging / discharging process for injecting the power to aid the real power output when it is below the reference power command which is sent by the energy control center.

The system continues in the charging phase when there is too much wind energy that may exceed the reference power command which is normally sent by the energy control center.

The implementation of the proposed algorithm on the validated model has shown encouraging results towards feasible implementation in practice and towards prospects of increasing the penetration of wind energy without negatively affecting the power system frequency.

Main Subjects

Mechanical Engineering

Topics

• Energy
• Wind turbines

No. of Pages

116

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-795921