Abstract:
Soft open points (SOPs) offer real-time power flows control, the rapid self-healing of faults, and the balance of feeder load, which are widely applied in the distributio...Show MoreMetadata
Abstract:
Soft open points (SOPs) offer real-time power flows control, the rapid self-healing of faults, and the balance of feeder load, which are widely applied in the distribution networks (DNs). However, distribution networks based on SOP often suffer from large signal disturbances such as grid voltage dips (GVDs) during operation, and their stability needs to be further improved to ensure the safe and stable operation of the SOP system. This article proposes a stable control strategy based on virtual capacitors and verifies the effectiveness of this method through theoretical analysis using mixed potential theory (MPT). Firstly, the virtual capacitor control strategy proposed in this article that can enhance the stability of SOP systems is stated. Secondly, a nonlinear average model of SOP was established, and based on MPT, the large signal stability criteria (LSSC) for the SOP system using virtual capacitor control strategy were derived. Based on this criterion, the impact of DC side capacitance on system stability was analyzed, and the effectiveness of virtual capacitance strategy to enhance the system's stable operation capability was verified. Finally, the correctness of the obtained criteria and the feasibility and effectiveness of the virtual capacitor strategy were verified through Matlab/Simulink time-domain simulation.
Date of Conference: 25-27 August 2023
Date Added to IEEE Xplore: 28 December 2023
ISBN Information:
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- IEEE Keywords
- Index Terms
- Control Strategy ,
- Stability Of System ,
- Enhancement Strategies ,
- Nonlinear Model ,
- Stable Performance ,
- Effectiveness Of Strategies ,
- Distribution Network ,
- Large Signal ,
- Stability Criterion ,
- Grid Voltage ,
- Large Disturbances ,
- Voltage Sag ,
- Dc Side ,
- Power Grid ,
- Inverter ,
- System Disturbances ,
- Dc System ,
- Dc Capacitor ,
- Small-signal Stability ,
- Constant Power Loads
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Control Strategy ,
- Stability Of System ,
- Enhancement Strategies ,
- Nonlinear Model ,
- Stable Performance ,
- Effectiveness Of Strategies ,
- Distribution Network ,
- Large Signal ,
- Stability Criterion ,
- Grid Voltage ,
- Large Disturbances ,
- Voltage Sag ,
- Dc Side ,
- Power Grid ,
- Inverter ,
- System Disturbances ,
- Dc System ,
- Dc Capacitor ,
- Small-signal Stability ,
- Constant Power Loads
- Author Keywords