Master's Thesis Student Grid Integration Control

**Master's thesis student Grid integration control**:

- REQUISITION ID: 9243
- LOCATION: Hamburg, DE, 22419
- DEPARTMENT: Students

Small-signal stability models are required for plans that contribute to local, intra-regional and inter-regional frequency modes in the power system. This includes synchronous generators and their Power Oscillation Dampers (PODs), dynamic reactive support plant with PODs, and any other plant which can reasonably impact damping of small-signal oscillations as determined by Australian Energy Market Operator (AEMO) and the relevant Network Service Providers (NSPs).

Small-signal stability models may also be required for studying the effects of sub-synchronous oscillations, such as inverter control system interactions up to 25 Hz. This will include any plant which can potentially contribute to such oscillations as determined by AEMO and the relevant NSP.

For synchronous machines, a fully validated RMS transient stability model is typically adequate for this analysis, as long as the corresponding small-signal model can be derived from block diagrams or source code using standard mathematical linearization techniques. However, for asynchronous technology, small-signal models derived from RMS transient stability models may not be sufficient for analyzing such phenomena. AEMO recommends that small-signal models should represent all sub-synchronous frequencies.

This thesis is to formulate a frequency domain-based approach for modelling of wind energy system, focusing but not limited to type III (DFIG) wind turbine system. The models are then used for small-signal stability analysis and potentially control design as well as improvement.

**YOUR TASKS**
- Conduct a methodologies state of the art review of system identification using impedance model and elect a suitable method to be used in the next steps
- Derive and validate the Linear parameter-varying (LPV) model for windfarm DFIG model from the chosen method
- Standardize the process of creating and validating the LPV model for power system model

**YOUR PROFILE**
- Currently pursuing a Master's degree in Control/Electrical/Power systems, a mixed field of control and energy would be advantageous
- Possess a strong understanding of energy power systems, especially for wind energy system
- Familiar with MATLAB/Simulink/Simscape specialized power systems toolboxes
- Have interest in Wind energy systems stability analysis and control design
- Experienced in converter control system and/or wind farm control system would be a plus
- Possessing programming knowledge in MATLAB and other languages such as Python, C/C++ would be advantageous
- Fluent in English, with knowledge of German or other languages being an added advantage
- Possess a self-organized personality and can handle complex technical problems with ease
- Capable of working effectively in a multilingual and multicultural team

**ABOUT THE NORDEX GROUP**:
The manufacture of wind energy plants in the on-shore segment has been our core competence and passion for around 35 years. With more than 52 GW installed capacity worldwide, our turbines supply sustainable energy to more than 80% of the global energy market and we are one of the largest companies in the wind industry. National subsidiaries in more than 30 markets and production facilities in Germany, Spain, Brazil, the USA, Mexico and India offer our more than 10,200 employees the opportunity for international and intercultural cooperation.

We are growing and together driving forward the expansion of alternative energies worldwide - if you wish, from now on with you. Join the #TeamNordex