Multiobjective optimization for hybrid AC/DC distribution network structure considering reliability

Shang, Longlong; Hu, Ran; Wei, Tao; Ci, Hai; Zhang, Wei; Chen, Hai

doi:10.1109/ispec53008.2021.9735745

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Simultaneously, the voltage deviation target of each 10 kV parallel network should be graded by considering the importance of the load [18], including three categories (Levels 1, 2, and 3). The corresponding weights are assigned as 0.5, 0.3, and 0.2, respectively.…”

Section: Objective Function Voltage Deviation Targetmentioning

confidence: 99%

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Multiple-Zone Synchronous Voltage Regulation and Loss Reduction Optimization of Distribution Networks Based on a Dual Rotary Phase-Shifting Transformer

Shao,

Yan,

Yang

et al. 2024

Sustainability

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For the problem in which accessing a high proportion of renewable energy results in exceeding the limit in distribution network voltage, the existing regulating method experiences difficulty in considering the two-way voltage regulation and loss reduction optimization function. This study proposes a series-type dual rotary phase-shifting transformer (DRPST) based on the principle of phase volume synthesis. This transformer exhibits bidirectional voltage regulation, high reliability, and low cost. First, the topology, operating principle, and equivalent circuit of DRPST are introduced, and its simplified circuit model is established. On the basis of this model, the causes of voltage exceeding the limits are analyzed and the active distribution network model that contains DRPST is constructed. A real-time rolling two-layer optimization strategy based on DRPST is proposed. The inner layer model is solved using the multi-objective particle swarm optimization algorithm with the objective of minimizing voltage deviation and line loss. The optimal compromise solution of the Pareto solution set of the inner layer model is determined using the fuzzy subordinate degree function method. The outer model is based on the optimal compromise solution of the inner model, and the DRPST output rotor angle is controlled without deviation through double closed-loop proportional–integral regulation. Finally, the correctness and effectiveness of the proposed topology and control method are verified via simulation and experimental analysis.

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Section: Objective Function Voltage Deviation Targetmentioning

confidence: 99%

“…The external file is the Pareto optimal solution set. Pareto solution set satisfaction is calculated from Equations ( 17) and (18). The optimal compromise solution and the current control variables are outputted.…”

Section: Drpst Control Block Diagrammentioning

confidence: 99%

Multiple-Zone Synchronous Voltage Regulation and Loss Reduction Optimization of Distribution Networks Based on a Dual Rotary Phase-Shifting Transformer

Shao,

Yan,

Yang

et al. 2024

Sustainability

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show abstract

“…With the emergence of grid-connected operation scenarios of new energy represented by wind power and photovoltaic, their large-scale access to the distribution network will have an impact on various aspects such as reliability and economy of the original power supply [1][2][3]. Power system dispatching faces serious challenges, and the existing dispatching technology is severely inadequate for scenic energy consumption [4].…”

Section: Introductionmentioning

confidence: 99%

A novel design of multi-layer-coordinated scheduling strategy for the distribution system

Li,

Yu,

Peng

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…The urgency of energy crises and environmental pollution issues has propelled the rapid development of microgrids [1,2]. A microgrid is a new type of network structure that is composed of distributed energy sources, loads, energy storage systems, and control devices [3].…”

Section: Introductionmentioning

confidence: 99%

Microgrid Pre-Synchronization Scheme for Suppressing Voltage Fluctuations and Avoiding Frequency Out-of-Limits

Gong,

Qin,

Liu

et al. 2024

Electronics

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Pre-synchronization control is needed when the microgrid changes from an off-grid state to a grid-connected state. Aiming to resolve the problems of frequency overstep and voltage fluctuation in traditional pre-synchronous grid-connection schemes, a micro-grid pre-synchronous grid-connection scheme is proposed that can solve both frequency overstep and voltage fluctuation at the same time. Firstly, the feedforward disturbance compensation V/f control strategy of the load voltage and current is introduced to the energy storage system to suppress voltage fluctuations caused by power changes. Then, the V/f control strategy of the energy storage system is improved to suppress voltage fluctuations caused by frequency fluctuations when the starting phase of pre-synchronization is enacted. Finally, PI parameters are optimized based on the golden jackal optimization algorithm to meet the requirements of frequency fluctuation and grid-connection speed in the pre-synchronization process. A large number of simulation experiments demonstrate the effectiveness of the proposed method.

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Multiobjective optimization for hybrid AC/DC distribution network structure considering reliability

Cited by 5 publications

References 22 publications

Multiple-Zone Synchronous Voltage Regulation and Loss Reduction Optimization of Distribution Networks Based on a Dual Rotary Phase-Shifting Transformer

Multiple-Zone Synchronous Voltage Regulation and Loss Reduction Optimization of Distribution Networks Based on a Dual Rotary Phase-Shifting Transformer

A novel design of multi-layer-coordinated scheduling strategy for the distribution system

Microgrid Pre-Synchronization Scheme for Suppressing Voltage Fluctuations and Avoiding Frequency Out-of-Limits

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