Exact Optimal Power Dispatch in Unbalanced Distribution Systems With High PV Penetration

Nguyen, Quan; Padullaparti, Harsha; Lao, Keng-Weng; Santoso, Surya; Ke, Xinda; Samaan, Nader

doi:10.1109/tpwrs.2018.2869195

Cited by 72 publications

(58 citation statements)

References 25 publications

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“…Optimization is a widely used mathematic tool for coordination design. Some optimal dispatch algorithms for distributed generators such as in [10] are formulated as centralized optimization problems, targeting at directly calculating optimized operation points for all distributed PV inverters at each time step. However, centralized schemes are not robust to single point failures, and the required communication is generally complicated.…”

Section: A Literature Reviewmentioning

confidence: 99%

A Distributed Inter-Phase Coordination Algorithm for Voltage Control With Unbalanced PV Integration in LV Systems

Wang

Yan

Bai

et al. 2020

IEEE Trans. Sustain. Energy

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Most traditional Var compensation-based voltage regulation methods are developed following the single-phase Volt-Var response rule. These methods typically have competent voltage regulation performance with balanced photovoltaic (PV) integration. However, certain randomness of single-phase rooftop PV installation may lead to significant PV power imbalance across three phases, especially in low voltage (LV) distribution systems. In such unbalanced situations, unintended inter-phase Volt-Var response which is ignored in the single-phase Volt-Var response rule will become significant and greatly challenge the effectiveness of the traditional methods on voltage regulation. This can further cause inverter saturation and consequently makes distribution systems vulnerable to overvoltage problems. In this paper, the mathematical equations of unbalanced three-phase Volt-Var response are first derived and analyzed to identify the strong MVE (mutual Var compensation effect) and the weak MVE. This analysis provides the theoretical foundation for the development of the proposed interphase coordinated consensus algorithm, which can successfully overcome PV imbalance-induced voltage regulation challenges (e.g. inverter saturation and network overvoltage), while does not need exact system parameters. The effectiveness of this method has been validated by time-series simulations with a real LV distribution system and recorded data.

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Section: A Literature Reviewmentioning

confidence: 99%

A Distributed Inter-Phase Coordination Algorithm for Voltage Control With Unbalanced PV Integration in LV Systems

Wang

Yan

Bai

et al. 2020

IEEE Trans. Sustain. Energy

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“…Besides, nodes 18 and 26 are equipped with 10MW and 8MW wind turbines (WT) respectively. In addition, the load connected with nodes 15,16,19,20,23,24,30 and 31 are assumed FL (i.e.,prosumers) and the others are CL. The load data of distribution are derived from the actual operation data in Henan Province, China, and the total prediction load curve (i.e., the sum of CL and FL before implementing DR program) and the prediction output of WT in a typical day are shown in Fig.…”

Section: A Basic Datamentioning

confidence: 99%

Distributed Optimal Dispatching of Multi-Entity Distribution Network With Demand Response and Edge Computing

Wang

Peng

2020

IEEE Access

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With large-scale penetrations of distributed generation (DG) and flexible loads, there will be multiple entities in traditional distribution network, such as distribution network operator (DNO), DG owner, and prosumers. Aiming at the collaborative optimization problem of distribution network among multiple entities, a distributed optimal scheduling approach of distribution network considering demand response and edge computing is proposed in this paper. Firstly, the virtual region decomposition method is proposed to divide the original distribution network into multiple regions according to different entities, and the bi-level optimization framework based on edge computing is constructed. Secondly, the optimal models of DNO, DG owner, and prosumers are established respectively, and the distributed optimal scheduling approach of distribution network with collaboration of control center and edge nodes is proposed. Then, the KKT conditions are adopted to realize the transformation of optimal models of DG owner and prosumers. Finally, the proposed distributed optimization scheduling approach is verified based on the modified IEEE33-node system. The results show that the proposed distributed optimal scheduling method can achieve better collaborative optimization among different entities in distribution network compared with the centralized optimization method. INDEX TERMS Demand response, edge computing, distributed optimization, KKT transformation, optimal dispatching.

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“…To minimize power losses, an OS in [29] installs distributed power sources of various types across the DS. An OS in [30] minimizes the operation costs consisting of several parts. This OS optimally dispatches the active and reactive power of distributed photovoltaic generation (PVG), the switched capacitors, and the voltage regulators in large multi-phase unbalanced DSs to minimize the energy loss, the PVG's active power curtailment, and the operations of capacitors and voltage regulators, in addition to the elimination of the voltage violations and the reverse power flow.…”

Section: Ps Oss Minimizing the Price Of Electricity/ps Oss Reducing Pmentioning

confidence: 99%

Review of Trends and Targets of Complex Systems for Power System Optimization

Vysocky

Mišák

2020

Energies

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Optimization systems (OSs) allow operators of electrical power systems (PS) to optimally operate PSs and to also create optimal PS development plans. The inclusion of OSs in the PS is a big trend nowadays, and the demand for PS optimization tools and PS-OSs experts is growing. The aim of this review is to define the current dynamics and trends in PS optimization research and to present several papers that clearly and comprehensively describe PS OSs with characteristics corresponding to the identified current main trends in this research area. The current dynamics and trends of the research area were defined on the basis of the results of an analysis of the database of 255 PS-OS-presenting papers published from December 2015 to July 2019. Eleven main characteristics of the current PS OSs were identified. The results of the statistical analyses give four characteristics of PS OSs which are currently the most frequently presented in research papers: OSs for minimizing the price of electricity/OSs reducing PS operation costs, OSs for optimizing the operation of renewable energy sources, OSs for regulating the power consumption during the optimization process, and OSs for regulating the energy storage systems operation during the optimization process. Finally, individual identified characteristics of the current PS OSs are briefly described. In the analysis, all PS OSs presented in the observed time period were analyzed regardless of the part of the PS for which the operation was optimized by the PS OS, the voltage level of the optimized PS part, or the optimization goal of the PS OS.

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Exact Optimal Power Dispatch in Unbalanced Distribution Systems With High PV Penetration

Cited by 72 publications

References 25 publications

A Distributed Inter-Phase Coordination Algorithm for Voltage Control With Unbalanced PV Integration in LV Systems

A Distributed Inter-Phase Coordination Algorithm for Voltage Control With Unbalanced PV Integration in LV Systems

Distributed Optimal Dispatching of Multi-Entity Distribution Network With Demand Response and Edge Computing

Review of Trends and Targets of Complex Systems for Power System Optimization

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