Optimal Operation of Hybrid AC/DC Distribution Network with High Penetrated Renewable Energy

Zhuo, Zhenyu; Zhang, Ning; Chen, Kang; Dong, RuiBiao; Liu, Yongxiao

doi:10.1109/pesgm.2018.8585802

Cited by 6 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multiterminal MVDC networks have been proposed for use in microgrids, distribution systems and renewable collection systems in the literature [26,[115][116][117]. Multiterminal networks are systems that do not contain a loop.…”

Section: Grid Topologiesmentioning

confidence: 99%

Review of MVDC Applications, Technologies, and Future Prospects

Coffey

Timmers

et al. 2021

Energies

View full text Add to dashboard Cite

This paper presents a complete review of MVDC applications and their required technologies. Four main MVDC applications were investigated: rail, shipboard systems, distribution grids, and offshore collection systems. For each application, the voltage and power levels, grid structures, converter topologies, and protection and control structure were reviewed. Case studies of the varying applications as well as the literature were analyzed to ascertain the common trends and to review suggested future topologies. For rail, ship, and distribution systems, the technology and ability to implement MVDC grids is available, and there are already a number of case studies. Offshore wind collection systems, however, are yet able to be implemented. Across the four applications, the MVDC voltages ranged from 5–50 kV DC and tens of MW, with some papers suggesting an upper limit of 100 kV DC and hundreds of MV for distribution networks and offshore wind farm applications. This enables the use of varying technologies at both the lower and high voltage ranges, giving flexibility in the choice of topology that is required required.

show abstract

Section: Grid Topologiesmentioning

confidence: 99%

Review of MVDC Applications, Technologies, and Future Prospects

Coffey

Timmers

et al. 2021

Energies

View full text Add to dashboard Cite

show abstract

“…Multiple research works have presented Optimal Power Flow (OPF) approaches for AC-DC grids, to determine operational setpoints of converters and Distributed Generators (DG). In [12] and [13] the mathematical models of AC-DC grids are expressed as OPF constraints and linearized; in [14], additionally, the detailed characterization of operating limits and losses for AC-DC converter station is included. The work presented in [15] proposes a decentralized approach, sub-dividing the optimization problem in AC subnetworks, DC sub-networks and AC-DC converters levels.…”

Section: Introductionmentioning

confidence: 99%

Service Restoration of AC–DC Distribution Grids Based on Multiple-Criteria Decision Analysis

et al. 2023

View full text Add to dashboard Cite

Modern distribution grids are transforming due to the increasing amount of load and generation based on DC technologies, whose interconnection is facilitated by the upcoming AC-DC distribution networks. Their fault management is challenged by new issues related to the power transferred among AC and DC sub-networks. In light of this, the present paper proposes a novel Service Restoration (SR) algorithm, specifically tailored for AC-DC distribution grids, that optimizes the re-energization by establishing priorities of disconnected bus groups and computing, as candidate solutions, hierarchical combinations of normally open and normally closed switches. To overcome the limitations of existing approaches, a Multiple Criteria Decision Analysis (MCDA) is proposed to combine and objectively prioritize different SR goals (i.e., the use of telecontrolled switches, the minimization of power losses, and the applicability of the proposed solutions in a defined time horizon), and ultimately make the grid operator benefit from the possibility to flexibly tune different operational objectives. The proposed algorithm allows to effectively discriminating competing solutions, i.e. whence and how to re-energize disconnected buses, and complies with the time requirements for field implementation. The results prove the crucial role of DC sub-networks, associated to the control of power injection from AC-DC converters, in enhancing the SR by improving its targets and increasing the number of re-energized loads. Ultimately, the effect of MCDA comparison parameters on the SR outcomes is quantitatively investigated via global sensitivity analysis, whose adoption is recommended for supporting the grid operator in the algorithm implementation.

show abstract

“…The design of energy management systems (EMSs) is a vast area of research with multiple applications in the contexts of microgrids, and active distribution networks, including applications in seaports [13,14], public buildings [15,16], hospitals [17], farms [18], and electrical distribution networks [11], among others. For this reason, in this research, we are interested in analyzing monopolar DC networks from the optimization point of view by proposing efficient energy management systems (EMS) for monopolar DC grids considering photovoltaic generation [19,20]. Using a multi-objective optimization approach, the proposed EMS considers three objective functions (economic, technical, and environmental) [11].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Dispatch of PV Plants in Monopolar DC Grids Using a Weighted-Based Iterative Convex Solution Methodology

2023

View full text Add to dashboard Cite

The design of an efficient energy management system (EMS) for monopolar DC networks with high penetration of photovoltaic generation plants is addressed in this research through a convex optimization point of view. The EMS is formulated as a multi-objective optimization problem that involves economic, technical, and environmental objective functions subject to typical constraints regarding power balance equilibrium, thermal conductor capabilities, generation source capacities, and voltage regulation constraints, among others, using a nonlinear programming (NLP) model. The main characteristic of this NLP formulation of the EMS for PV plants is that it is a nonconvex optimization problem owing to the product of variables in the power balance constraint. To ensure an effective solution to this NLP problem, a linear approximation of the power balance constraints using the McCormick equivalent for the product of two variables is proposed. In addition, to eliminate the error introduced by the linearization method, an iterative solution methodology (ISM) is proposed. To solve the multi-objective optimization problem, the weighted optimization method is implemented for each pair of objective functions in conflict, with the main advantage that in this extreme the Pareto front has the optimal global solution for the single-objective function optimization approach. Numerical results in the monopolar version of the IEEE 33-bus grid demonstrated that the proposed ISM reaches the optimal global solution for each one of the objective functions under analysis. It demonstrated that the convex optimization theory is more effective in the EMS design when compared with multiple combinatorial optimization methods.

show abstract

Optimal Operation of Hybrid AC/DC Distribution Network with High Penetrated Renewable Energy

Cited by 6 publications

References 14 publications

Review of MVDC Applications, Technologies, and Future Prospects

Review of MVDC Applications, Technologies, and Future Prospects

Service Restoration of AC–DC Distribution Grids Based on Multiple-Criteria Decision Analysis

Multi-Objective Dispatch of PV Plants in Monopolar DC Grids Using a Weighted-Based Iterative Convex Solution Methodology

Contact Info

Product

Resources

About