The Steady-State and Fault Ride-Through Control Strategies of Soft Normally Open Point in Distribution Network

Li, Yuze; Pan, Xing; Chen, Zhi; Yang, Minghong; Lyu, Zhibi

doi:10.1109/ecce.2018.8557615

Cited by 13 publications

(4 citation statements)

References 11 publications

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“…Since each converter can control two state quantities at the same time, the reactive power of the converter can also be controlled [24]- [26]. When a fault occurs, by switching the control mode, the converter can control the voltage and frequency of the non-faulty area of the power system to achieve uninterrupted power supply [27]. In this paper, the research focuses on the small-signal model in normal working mode.…”

Section: Snop Aims To Replace Traditional Normally Open Point (Nop)mentioning

confidence: 99%

“…According to the generalized instantaneous reactive power theory [35], P k and Q k can be calculated as (26) Let ( 27) Linearizing ( 25) and combining with (27), it can be derived that (28) where (29) The current controller of the inner loop can be expressed as (30) Let ( 31) Linearizing (30) and combining with (31), it can be derived that (32) Due to a certain delay between the output of the inverter and the output of control system, the modulation process of the converter can be regarded as a first-order inertia link, i.e.…”

Section: Small-signal Model Of the Control System Of Pq Terminalmentioning

confidence: 99%

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General Small-Signal Modeling and Parameter Optimization of the Soft Normally-Open Point Connected to the Distribution Network

et al. 2021

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The soft normally-open point (SNOP) is a multi-terminal power electronic device installed between two or more feeders in the low and medium voltage distribution network, which can adjust the active power and reactive power between the feeders. A small-signal model of SNOP connected to the distribution network is established. The model includes the linearization equations of the AC system, voltage source converter, control system and internal DC system. State space is used to describe the small-signal model. The state matrix of SNOP is derived, which is not limited by the strength of AC system and the number of terminals. The objective function of control parameter optimization is established according to the characteristic roots of the state matrix. Taking a three-terminal system as an example, the characteristic roots of the state matrix are calculated and the stability of the system can be judged. The accuracy of the model is verified by the comparison of the electromagnetic transient model and the small-signal model, and the parameter optimization method is verified by the time domain simulation.

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Section: Snop Aims To Replace Traditional Normally Open Point (Nop)mentioning

confidence: 99%

Section: Small-signal Model Of the Control System Of Pq Terminalmentioning

confidence: 99%

General Small-Signal Modeling and Parameter Optimization of the Soft Normally-Open Point Connected to the Distribution Network

et al. 2021

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“…FRT application by SOP based on a B2B half-bridge MMC is proposed in [64]. The simulation result is given for unbalance current compensation using negative sequence current compensation method during unbalanced faults.…”

Section: ) Fault Ride Throughmentioning

confidence: 99%

Soft Open Point in Distribution Networks

et al. 2020

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The main objective of this paper is to present a comprehensive review of soft open point (SOP), an emerging power electronics technology to maximize future distribution networks' (DNs) resiliency and flexibility as well as increase hosting capacity for distributed energy resources like photovoltaics and electric vehicles. The SOP is currently an active area of research and ongoing development of new control techniques for SOP and optimization algorithm for the optimal use of SOP in DNs produces new techniques until DN operators use it comprehensively in their systems. The motivation for this work is to present the research that has been completed for the SOP and summarize the duties of SOP in DNs according to the literature and propose advanced duties for SOP according to modern standards. Finally, future research directions are mentioned to pave the way for research in the coming years to drive the DNs towards more flexibility and 'Robust' from controllability, stability, and protection structure point of view. INDEX TERMS Distribution networks, grid-connected converters, power electronics, soft open point, normally open points.

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“…On this basis, FMSS plays a significant role in facilitating the feeder load balance, reducing network losses, improving voltage quality and eliminating the fluctuation of intermittent energy. When the system fails, FMSS can achieve uninterrupted power supply for important users and reduce the power outage range and the power outage time through multi‐terminal coordinated scheduling, thereby enhancing system reliability [5, 6]. However, FMSS access has changed the closed‐loop design and open‐loop operation power supply mode in distribution network.…”

Section: Introductionmentioning

confidence: 99%

Reliability evaluation and analysis of multi‐terminal interconnect power distribution system with flexible multi‐state switch

Liu

Huang

Yang

et al. 2020

IET Generation, Transmission & Distribution

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The Steady-State and Fault Ride-Through Control Strategies of Soft Normally Open Point in Distribution Network

Cited by 13 publications

References 11 publications

General Small-Signal Modeling and Parameter Optimization of the Soft Normally-Open Point Connected to the Distribution Network

General Small-Signal Modeling and Parameter Optimization of the Soft Normally-Open Point Connected to the Distribution Network

Soft Open Point in Distribution Networks

Reliability evaluation and analysis of multi‐terminal interconnect power distribution system with flexible multi‐state switch

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