Abstract
As an important interface converter, the three-phase voltage-source rectifier (VSR) connects the grid to DC-input converters. The constant power load (CPL) characteristic of the converter-load often causes large-signal stability problems. In order to solve this problem, the stability boundary of the VSR with CPL is analyzed based on the mixed potential theory, and the stability condition under large-signal disturbance is obtained; thus, the jump range of the load power can be estimated. To improve the stability of the system, a voltage loop control scheme based on ADRC is proposed. A theoretical analysis based on the mixed potential theory shows the proposed scheme expands the power jump range of the VSR with CPL effectively, and improves its disturbance rejection performance. Finally, experimental results prove the effectiveness of the proposed control scheme.
Highlights
In order to achieve the goal of multi-functionality, low-cost and high reliability, modularization has become an important trend in power electronics [1–3]
Deriving the stable boundary of voltage-source rectifier (VSR) with constant power load (CPL) based on active disturbance rejection control (ADRC), which proves that the proposed control scheme expands the load power jump range effectively
Deriving the stable boundary of VSR with CPL based on ADRC, which proves that3 ofthe proposed control scheme expands the load power jump range effectively
Summary
In order to achieve the goal of multi-functionality, low-cost and high reliability, modularization has become an important trend in power electronics [1–3]. To improve the dynamic performance of three-phase VSR with large-signal disturbance, a direct voltage control method based on feedback linearization is proposed in [28]. Obtaining a large-signal model of three-phase VSR with CPL based on mixed potential theory, whose stable boundary is derived when load power jumps. Deriving the stable boundary of VSR with CPL based on ADRC, which proves that the proposed control scheme expands the load power jump range effectively. Energies 2018, 11, x FOR PEER REVIEW (2) Proposing a voltage control scheme to improve the large-signal stability based on ADRC, and whose control stability is proven. Deriving the stable boundary of VSR with CPL based on ADRC, which proves that ofthe proposed control scheme expands the load power jump range effectively.
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