An optimal reactive power control method for distribution network with soft normally-open points and controlled air-conditioning loads

Wang, Qianggang; Liao, Jianquan; Su, Yu; Lei, Chao; Wang, Tao; Zhou, Niancheng

doi:10.1016/j.ijepes.2018.06.027

Cited by 24 publications

(13 citation statements)

References 29 publications

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“…In (21) and (22), V IGBT is the voltage across the collector and emitter of the IGBT, E ON and E OFF are turn-on and turn-off losses of the IGBTs, respectively, f sw is the switching frequency, I C, nom is the nominal collector current of the IGBT, E rr is the turn off (reverse recovery) loss of the diodes, and r IGBT is the lead resistance of the IGBT. Besides, in (20), I i, t conv is the root-meansquare value of the current at the converter's AC terminal connected to the node i at period t and is calculated as follows:…”

Section: Principle and Modelling Of Sopsmentioning

confidence: 99%

“…This performance yields an improved operation of SDG within which the ending points of feeders are more susceptible to undervoltage issues due to longest path from the feeding points. To this end, an optimal reactive power control method has been proposed in [22] for distribution systems which is equipped with SOPs considering the direct load control of thermostatic loads. In [23], a hybrid bi-level optimisation method has been proposed for multi-objective supply restoration in the SDGs with SOPs, where the proposed model is formulated as a typical mixed-integer non-linear programming problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flexible feeder interconnections for increased penetration of renewables and improved volt/VAr control in distribution networks

Baghban-Novin

Golshannavaz

Nazarpour

et al. 2019

IET Generation, Transmission & Distribution

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Section: Principle and Modelling Of Sopsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible feeder interconnections for increased penetration of renewables and improved volt/VAr control in distribution networks

Baghban-Novin

Golshannavaz

Nazarpour

et al. 2019

IET Generation, Transmission & Distribution

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“…Foreign researches on energy interconnection focus on the content and characteristics of energy interconnection, on-site practice results of energy interconnection, practical significance and composition of energy interconnection, etc., and relevant researches have achieved certain results [4]. In literature [5], the author discusses the characteristics and related control of new energy distribution network under the Internet, and analyzes the characteristics of this type of distribution network from the aspects of basic mode, structure and information requirements.…”

Section: Introductionmentioning

confidence: 99%

Research on Multi-level Distribution Strategy Based on Energy Internet

Xu²,

et al. 2021

E3S Web Conf.

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Smart city energy Internet is to comply with the trend of sustainable energy development, urban power energy as the center, comprehensive utilization of all kinds of energy, especially renewable energy, to achieve interconnection and common optimization. Based on the background of distribution network in Disney Park, this paper studies the regulation, operation and management strategy of distribution network of smart city energy Internet. This paper describes the characteristics of the energy Internet, and then analyzes the key technologies that affect power grid regulation, operation and management. The paper investigated the distribution network construction in Shanghai Disney Park under the background of urban energy Internet pilot region to understand the allocation of distributed energy in the park grid. Through simulation calculation and analysis, this paper puts forward a distribution network regulation and management scheme suitable for the characteristics of energy Internet. In this paper, the study found that with the rapid development of power grid, especially all kinds of distributed energy access, the new lines are becoming more. In a wide range of power grid structure is becoming more and more complex, in order to ensure the reliability of power supply and power supply quality, scientific regulation under the background of urban energy Internet development mode, enhancing the management level of power grid is the inevitable developing trend of power grid.

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“…In [33, 34], the authors propose an optimal operation of SOPs in ADNs under three‐phase unbalanced conditions, and the flexible interconnection based on a multi‐terminal SOP significantly benefits the operation of ADNs by using the second‐order cone programming (SOCP)‐based method. In [35], the authors propose an optimal reactive power control method for distribution systems with SOPs and consider the direct load control of thermostatically controlled air‐conditioning. In [36], a two‐stage adjustable robust optimisation model with operational strategies of SOP is built to tackle the uncertainties of photovoltaics (PV) outputs.…”

Section: Introductionmentioning

confidence: 99%

New phase‐changing soft open point and impacts on optimising unbalanced power distribution networks

Lou

Yang

et al. 2020

IET Generation, Transmission & Distribution

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Three-phase unbalanced conditions in distribution networks are conventionally caused by load imbalance, asymmetrical fault conditions of transformers and impedances of three phases. The uneven integration of single-phase distributed generation (DG) worsens the imbalance situation. These unbalanced conditions result in financial losses, inefficient utilisation of assets and security risks to the network infrastructure. In this study, a phase-changing soft open point (PC-SOP) is proposed as a new way of connecting soft open points (SOPs) to balance the power flows among three phases by controlling active power and reactive power. Then an operational strategy based on PC-SOPs is presented for three-phase four-wire unbalanced systems. By optimising the regulation of SOPs, optimal energy storage systems dispatch and DG curtailment, the proposed strategy can reduce power losses and three-phase imbalance. Second-order cone programming (SOCP) relaxation is utilised to convert the original non-convex and non-linear model into an SOCP model which can be solved efficiently by commercial solvers. Case studies are conducted on a modified IEEE 34-node three-phase four-wire system and the IEEE 123node test feeder to verify the effectiveness, efficiency and scalability of the proposed PC-SOP concept and its operational strategy.MAX maximum active and maximum reactive powers of DER at node i at time t * conjugate transpose

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An optimal reactive power control method for distribution network with soft normally-open points and controlled air-conditioning loads

Cited by 24 publications

References 29 publications

Flexible feeder interconnections for increased penetration of renewables and improved volt/VAr control in distribution networks

Flexible feeder interconnections for increased penetration of renewables and improved volt/VAr control in distribution networks

Research on Multi-level Distribution Strategy Based on Energy Internet

New phase‐changing soft open point and impacts on optimising unbalanced power distribution networks

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