AC / DC bus voltage stability control method for hybrid microgrid based on switching system
By applying a switching system-based control method in a hybrid microgrid, the problem of poor AC-DC bus voltage stability during switching operation of a hybrid microgrid is solved, and the stable control of AC-DC bus voltage is realized, and the application of switching system theory in power systems is expanded.
CN112838616BActive Publication Date: 2025-03-25LIAONING UNIVERSITY OF TECHNOLOGY
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Patent Information
- Application Number
- CN202110027868.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-01-11
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2041-01-11
AI Technical Summary
Technical Problem
The prior art has poor stability control of AC and DC bus voltage during the switching operation of hybrid microgrids.
Method used
Using a control method based on the switching system, the switching system model of the interconnected converter is established, and the stability controller is designed, and the common Lyapnov function is constructed to ensure the stability of the switching process.
Benefits of technology
It effectively ensures the stability of AC-DC bus voltage when switching between the AC-DC microgrid joint operation mode and the joint off-grid operation mode, and expands the application of switching system theory in power systems.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to a hybrid microgrid AC / DC bus voltage stabilization control method based on a switching system, and the steps are: according to KVL, a mathematical model of an interconnected converter in a hybrid microgrid AC / DC microgrid combined grid-connected and off-grid operation is obtained by park transformation to obtain a mathematical model II1 and a mathematical model II2; mathematical models II1 and II2 are augmented to obtain a switching system model I1 and a switching system model I2; combined with unknown parameters, a switching system model II1 and a switching system model II2 containing unknown parameters are established; a stabilization controller is designed for subsystem 1 and subsystem 2 respectively by combining a backstepping method with an improved adaptive method, and a common Lyapunov function of subsystem 1 and subsystem 2 is constructed at the same time; the switching law of subsystem 1 and subsystem 2 is determined according to the hybrid microgrid operation mode, and the common Lyapunov function ensures the stability of the switching process. The present invention has a good stabilization effect on the AC / DC bus voltage of the hybrid microgrid.
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