Concurrent Voltage Control and Dispatch of Active Distribution Networks by Means of Smart Transformer and Storage

Gao, Xiang; Sossan, Fabrizio; Christakou, Konstantina; Paolone, Mario; Liserre, Marco

doi:10.1109/tie.2017.2772181

Cited by 54 publications

(31 citation statements)

References 37 publications

(35 reference statements)

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“…Simultaneous voltage control and power dispatch in ADNs by the combination of smart transformer and ESS were presented by Gao et al 17 The storage system is used to dispatch active power flow while the smart transformer regulated the voltage. The results show an improvement in voltage profile.…”

Section: Introductionmentioning

confidence: 99%

Real‐time multiperiod voltage control algorithm with OLTC and switched capacitors for smart distribution networks in the presence of energy storage system

Olatunde

Hassan

Abdullah

et al. 2020

Int Trans Electr Energ Syst

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Summary Conventionally, voltage profile are regulated by controllers that are not operational flexible to the system dynamism and challenges offered by the integration of renewable energy sources. Consequently, there is a need for the adaptive coordinating mechanism as an interface between the passive network and the new active network. This will provide a platform for the smooth integration of distributed energy resources in most developing countries where traditional network is still operational. This paper proposes an algorithm for real‐time multiperiod adaptive compensation of network reactive power support based on hierarchical structure and decentralized layered multiagent system voltage coordinating scheme. A multiperiod voltage control algorithm replicates the daily load flow evaluation aiming at ameliorating voltage fluctuation over a 24‐hour simulation period. The algorithm applies the decentralized voltage control mechanism to monitor the network parameters and dynamically evaluate the capacity of the capacitor banks (CBs) to be injected for voltage compensation. This mitigates the challenges associated with under and over reactive power compensation experienced in the day‐ahead programming and manual switching operation. The algorithm works in conjunction with an on‐load tap changing transformer (OLTC) and energy storage system (ESS). The ESS complements the OLTC during switching delay, dip in its output root mean square and voltage fluctuation as network loading condition varies. The effectiveness of the proposed method is verified on standard IEEE 33 and 118‐bus distribution systems. The results show an improved voltage performance and reduction in stress/complexity associated with load and renewable generation forecast in manual switching operations.

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Section: Introductionmentioning

confidence: 99%

Real‐time multiperiod voltage control algorithm with OLTC and switched capacitors for smart distribution networks in the presence of energy storage system

Olatunde

Hassan

Abdullah

et al. 2020

Int Trans Electr Energ Syst

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“…Tao Yang is with the WANMA Group, Xihu Distinct, Hangzhou, Zhejiang, China. (e-mail:tao.yang@ucdconnect.ie) incorporation of distributed energy resources (DER) [3][4] and storage systems [5] [6]. However to date full scale prototype SSTs have only achieved efficiencies in the range of 96.75% [7] [8].…”

Section: Introductionmentioning

confidence: 99%

Neutral Current Minimization Control for Solid State Transformers Under Unbalanced Loads in Distribution Systems

Chen

Yang²,

O’Loughlin

et al. 2019

IEEE Trans. Ind. Electron.

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This paper analyses the neutral current reduction performance of a three phase four leg solid state transformer (SST) under different degrees of unbalanced load. Several kinds of control strategies are presented, the neutral current elimination controls which rely on phase shifting, voltage amplitude and phase shifting & voltage amplitude combination control. A neutral current minimization control which ensures the SST output voltages complies with the EN 50160 output voltage unbalance standard is also developed. These control approaches simply build on the balanced voltage control providing voltage references which slightly unbalanced the voltage amplitude and phase angle or both. The effectiveness of the proposed strategies is validated through tests on a downscaled prototype. Simulation results for the neutral current minimization control of the SST applied to a real urban distribution network with distributed loads are presented. The results of this analysis show that overall the neutral current minimization results in an energy saving from both reduced losses in the distribution cables and reduced power consumption in the load.

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“…In MV grid, the ST can perform grid current congestion, power factor correction, harmonics mitigation [9], [10]. By providing reactive power in MV grid, the ST can also support MV grid voltage performance, similarly to the STATCOM [11], [12]. This paper compares the performances and cost between the STATCOM and ST as a guide for design of ancillary services.…”

Section: Introductionmentioning

confidence: 99%

Comparison of voltage support services by means of STATCOM and smart transformer in medium voltage grid

Gao

Zhu

Carne

et al. 2018

2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)

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Due to the increasing demand of electrical energy, especially in urban areas, the traditional distribution power grid reaches its limitations of operation (e.g. large current flow or voltage deviation). The distribution grid needs to be upgraded to ensure stability margin of operation. Since the cost of space is expensive and there is also resistance against installation of extra equipment from local resident, to install new equipment in distribution grid becomes difficult. The choice of new device to support the grid must consider not only the services but also the cost of equipment and space. The devices based on power electronics (STATCOM, smart transformer (ST)) are able to provide ancillary services such as voltage support to medium voltage (MV) distribution grid. In this paper, the ST is analyzed and compared with the STATCOM in terms of cost and performance. By means of literature review and simulation, the performance of ST has been analyzed. The result shows that the ST provides more services to assist the control in distribution grid than STATCOM. In order to achieve the same performance of voltage support, the investment of ST is less. Index Terms-Smart Transformer, voltage support in distribution grid, reactive power control, MV grid control, STATCOM.

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Concurrent Voltage Control and Dispatch of Active Distribution Networks by Means of Smart Transformer and Storage

Cited by 54 publications

References 37 publications

Real‐time multiperiod voltage control algorithm with OLTC and switched capacitors for smart distribution networks in the presence of energy storage system

Real‐time multiperiod voltage control algorithm with OLTC and switched capacitors for smart distribution networks in the presence of energy storage system

Neutral Current Minimization Control for Solid State Transformers Under Unbalanced Loads in Distribution Systems

Comparison of voltage support services by means of STATCOM and smart transformer in medium voltage grid

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