PROJECT TITLE: Solid State Synchronous Generator
PhD period: 2019.02.01 – 2022.01.31.
Section: Power Electronic Systems
Research Programme: Efficient and Reliable Power Electronics
Supervisor: Frede Blaabjerg
Co-Supervisor: Dao Zhou
Collaborator: To be announced later.
Funding: Self-financing and Dept. of Energy Technology.
Considering the benefits of a synchronous generators, both virtual inertia and high short circuit capability are expected to be emulated by a power electronic converter with the help of energy storage system.
First, the theory of synchronous generators under both normal and abnormal operation will be detailed studied and analyzed to gain the basic modelling method of a synchronous generator. Then it will be expended to a power electronic converter to achieve synchronous generator emulation including inertia and short circuit capability.
To implement SSSG in power converters, the topology of the system will consist of the DC source, VSI with the output filter. The inner loop control strategy of VSI will use the double loop control including voltage and current control. Considering the outer power control loop with SSSG will have much slower dynamics, the average model of VSI will be built and used to study characteristics of the SSSG. Also, the droop control emulating the governor of a synchronous generator will be used to share the loads without communication.
To emulate the high short circuit capability of a synchronous generator, hardware design will be implemented for the SSSG. On one hand, the basic parameters of physical and control system will be carefully designed. On the other hand, additional circuit and new cooling method will be proposed to improve the short circuit capability. The as the key component of the SSSG, ESS will be designed both in capacity and type. According to the requirement of applications, hybrid ESS may be used.
Publications in journals and conference papers may be found at VBN.