Coordinated control of tie switch and soft normally open point for harnessing flexibility in active distribution systems

Gu, Hui; Chu, Xiaodong; Tang, Maosen

doi:10.1088/1742-6596/1176/6/062052

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, the fully controlled device can directly control power fluctuation to reduce harmonic content and improve power quality. In [17,18], a soft normally open point was proposed to replace the traditional tie switch, change the mode of open-loop operation, and optimize the power flow. In [19], the author proposed a topology scheme of a flexible DC ring network controller suitable for urban power grids.…”

Section: Figurementioning

confidence: 99%

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Zhang

2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

Large-scale urban power grid (LUPG) is normally under the operating mode by voltage layer and zone partition. One of the most important directions for the development of urban is to enhance the controllability by flexible low-frequency interconnection technology. In this study, a frequency selection method for urban low-frequency multi-terminal interconnected systems (ULFMIS) is proposed. Firstly, the required support power under different conditions, the index number of sending partition (SP) and receiving partition (RP) are determined. Secondly, by calculating the current distribution along the line under different support powers, the upper limit of the transmission frequency (ULTF) of each line is obtained. Finally, the smallest transmission frequency among the ULTFs of different tie lines is selected as the ULTF of the ULFMIS. The proposed method is validated in a typical four-terminal ULFMIS. The results demonstrate that the suggested method is suitable for calculating the ULTF taking account of the influence of the number of parallel lines on economic cost and provide guidance for future practical ULFMIS projects.

show abstract

Section: Figurementioning

confidence: 99%

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Zhang

2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…Also, the SOP has stronger power regulation ability and faster response speed compared with conventional voltage regulation devices. Different from the mechanical voltage regulation devices such as OLTCs, the SOP is a fully controlled power electronic converter and can quite quickly regulate its outputs of two sides [23,24,31]. In addition, the SOP can play a critical role in fault isolation and power restoration, because the fault current can be limited by the converters on both sides of the SOP, due to the isolation of the DC link [25].…”

Section: System Descriptionmentioning

confidence: 99%

Coordinated Voltage Regulation Methods in Active Distribution Networks with Soft Open Points

Wang

Chen

et al. 2020

Sustainability

View full text Add to dashboard Cite

This paper proposes a coordinated voltage regulation method for active distribution networks (ADNs) to mitigate nodal voltage fluctuations caused by photovoltaic (PV) power fluctuations, where a three-stage optimization scheme is developed to coordinate and optimize the tap position of on-load tap changers (OLTCs), the reactive power of capacitor banks (CBs), and the active and reactive power of soft open points (SOPs). The first stage aims to schedule the OLTC and CBs hourly using the rolling optimization algorithm. In the second stage, a multi-objective optimization model of SOPs is established to periodically (15 min) optimize the active and reactive power of each SOP. Meanwhile, this model is also responsible for optimizing the Q-V droop control parameters of each SOP used in the third stage. The aim of the third stage is to suppress real-time (1 min) voltage fluctuations caused by rapid changes in PV power, where the Q-V droop control is developed to regulate the actual reactive power of SOPs automatically, according to the measured voltage at the SOPs’ connection points. Furthermore, numerous simulations and comparisons are carried out on a modified IEEE 33-bus distribution network to verify the effectiveness and correctness of the proposed voltage regulation method.

show abstract

Hybrid Open Points Planning with Dynamic Capacity Enhancement and Voltage Quality Improvement

Wu,

Jiang,

Huang

et al. 2024

2024 IEEE 2nd International Conference on Power Science and Technology (ICPST)

View full text Add to dashboard Cite

Coordinated control of tie switch and soft normally open point for harnessing flexibility in active distribution systems

Cited by 3 publications

References 5 publications

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Coordinated Voltage Regulation Methods in Active Distribution Networks with Soft Open Points

Hybrid Open Points Planning with Dynamic Capacity Enhancement and Voltage Quality Improvement

Contact Info

Product

Resources

About