Phase Sequence Exchange Technology Based on MMC for Improving the Power Angle Stability of Power Systems
Peng Dong,
Shaofeng Huang,
Peng Sun,
Tailai Xu,
Junjian Lin,
Hui Li,
Yifan Li
Affiliations
Peng Dong
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Shaofeng Huang
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Peng Sun
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Tailai Xu
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Junjian Lin
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Hui Li
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Yifan Li
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing 102206, China
Power angle stability of power systems is one of the main factors which restricts the power transmission capacity. In order to prevent the power angle instability of power systems, phase sequence exchange (PSE) is a recently developed emergency control technique that reduces the power angle by 120°. This paper proposes a new phase sequence exchange technology based on a modular multi-level converter (MMC). In this paper, the concept of deceleration area ratio is proposed, that is used to characterize the power angle stability of the power system, and the phase sequence exchange theory based on an MMC is analyzed. A phase sequence exchange circuit based on a modular multilevel converter (MMC) is designed. In this paper, the system parameters of the MMC-based PSE are optimized. Finally, a model is developed on PSCAD. The simulation results show that the MMC-based phase sequence exchange technology can effectively improve the power angle stability of the power system.
