Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks

Power systems;Control systems

Ainsworth, Nathan Grey ; Grijalva, Santiago Electrical and Computer Engineering Egerstedt, Magnus Harley, Ronald Saeedifard, Maryam Nemirovski, Arkadi ; Grijalva, Santiago

University:Georgia Institute of Technology

Department:Electrical and Computer Engineering

关键词: Power systems;    Control systems;   

Others  :  https://smartech.gatech.edu/bitstream/1853/53985/1/AINSWORTH-DISSERTATION-2014.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

The objective of the proposed research is 1) to develop a general dynamic condition sufficient to ensure frequency synchronization of inverter-based AC power networks, and 2) to develop a distributed control regime that is capable of guaranteeing that the above condition holds for a scalable class of such networks. I will first develop a structure-preserving model of an arbitrary network whose sources are all inverters operating frequency-droop control. By applying graph theoretic methods to the model, I will show that there exists a “safe operating region” of the state space such that if the network angle trajectory stays in this region, then frequency synchronization is shown by Lyapunov-like methods. By analogy to similar problems solved in other applications, I will develop a new distributed control regime to constrain a network of the target class to the safe operating region, thus guaranteeing frequency synchronization. These techniques may form the basis for future development of ultra-reliable, scalable inverter-based networks.