Dynamics of dc bus networks and their stabilization by decentralized delayed feedback

Area of Science:

• Electrical Engineering
• Control Systems Theory
• Network Dynamics

Background:

• Analyzing the stability of interconnected direct current (DC) bus systems is crucial for reliable power grids.
• Understanding the impact of network topology and size on system stability is a significant challenge.

Purpose of the Study:

• To investigate the dynamics and stability of multi-bus DC systems connected via resistors.
• To develop and validate a decentralized control strategy for stabilizing these networks.

Main Methods:

• Analytical methods were employed to guarantee the stability equivalence between stand-alone and interconnected DC bus systems.
• A decentralized delayed-feedback control approach was designed and applied to unstable operating points.
• Numerical simulations were used to confirm the analytical findings.

Main Results:

• The stability of a single DC bus system is equivalent to that of the entire network, irrespective of the number of systems or topology.
• A decentralized delayed-feedback controller effectively stabilizes unstable operating points within the network.
• Controller design procedure is systematically presented and validated.

Conclusions:

• The proposed decentralized control strategy offers a robust solution for stabilizing complex DC bus networks.
• The findings are independent of network size and topology, providing a versatile control approach.
• This research contributes to the reliable operation of modern DC power systems.