Pyramidal approximation for power flow and optimal power flow

Zhang, Bo; Ai, Xiaomeng; Yao, Wei; Chen, Zhe; Wen, Jinyu

doi:10.1049/iet-gtd.2019.1956

Cited by 8 publications

(3 citation statements)

References 47 publications

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“…In the steady-state model of the power system [25], the effects of three-phase imbalance are neglected, and the power flow calculation model is given by…”

Section: Power System Energy Balance Equationmentioning

confidence: 99%

Risk Assessment for Energy Stations Based on Real-Time Equipment Failure Rates and Security Boundaries

Luo,

Li,

et al. 2023

Sustainability

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In the context of China’s 2020 dual carbon goals of peak CO2 emissions by 2030 and carbon neutrality by 2060, the security of multi-energy systems is increasingly challenged as clean energy continues to be supplied to the system. This paper proposes a risk assessment and enhancement strategy for distributed energy stations (DESs) based on a security boundary. First, based on the coupling relationship between different energy sources and combining the mutual support relationships between different pieces of equipment, a security boundary for DESs was constructed. Second, based on the characteristics of different sources of equipment failure, the real-time failure probabilities of equipment and pipelines were calculated in order to obtain the security risks of DES operation states based on the security boundary. Finally, for equipment and pipelines at high risk, an economic security enhancement strategy is proposed, and the Pareto solution set is solved using a multi-objective algorithm. The analysis shows that the proposed method can effectively quantify the security risks of energy systems in real time, and the proposed enhancement strategy takes into account both economics and system security.

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“…In the steady-state model of the power system [25], the effects of three-phase imbalance are neglected, and the power flow calculation model is given by…”

Section: Power System Energy Balance Equationmentioning

confidence: 99%

Risk Assessment for Energy Stations Based on Real-Time Equipment Failure Rates and Security Boundaries

Luo,

Li,

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…Considering the uncertainty of power injection, the robustness of OPF solutions needs to fit the following conditions: (i) There exists a solution to the power flow equality constraints; (ii) the solution satisfies operational limits formulated as inequality constraints [9]. In order to ensure the above conditions, most algorithms simplify the AC power flow equation by linearization [10,11] or convex relaxation [12].…”

Section: Introductionmentioning

confidence: 99%

An optimal scheduling of renewable energy in flexible interconnected distribution networks considering extreme scenarios

Zhang

Zhong

Deng

et al. 2023

IET Renewable Power Gen

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As renewable power penetration gradually increases in hierarchical distribution networks, certain regions have started to lack the ability to consume. How to improve the consumption capacity of a hierarchical distribution network through optimal dispatching has become a hot topic in the current research on distribution system operation. Firstly, the article makes an accurate and rapid assessment of the consumption capacity of the station area through the limit scenario analysis method; secondly, based on the assessment results, the main network renewable power sources are prioritized for consumption, while the main network and the station area; thirdly, the main network renewable power sources are prioritized for consumption, considering the assessment results while the main network and the station area reach the optimal power flow simultaneously through a multi-layer dispatching model. Then, through the flexible interconnection system, load balancing and energy optimization are performed for unconsumed distributed generation (DG) and incomplete energy storage system (ESS) in the station area to further improve the efficiency of renewable energy. Finally, the effectiveness of the proposed model is verified by simulation tests.

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“…The technique considers different load models and can be extended for other applications like optimal LF, and network reconfiguration. Zhou et al 21 suggested a multisided pyramidal approximation scheme for obtaining feasible region for LF and optimal LF method for achieving linearity, tightness, and solution accuracy without depending on the initial guess. Remolino et al 22 developed a simple LF method involving backward and forward for distribution systems possessing a number of PV nodes.…”

mentioning

confidence: 99%

Soccer league optimization for load flow analysis of power systems

Srilakshmi¹,

Babu²,

Venkatesan

et al. 2021

Int J Numerical Modelling

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This paper proposes a generalized soccer league optimization (SLO) based load flow (LF) method suitable for both transmission and distribution systems. The LF problem is formulated as an optimization problem of lowering the sum of squares of active and reactive power mismatches at all busses, while taking the net corrections of bus voltage angles and magnitudes as unknown decision variables. The formulated problem is then solved using SLO, a population-based algorithm imitated from the behavior of team players of soccer league competition. The performances in respect of accuracy, robustness to different line r/x ratios, and computational efficiency are studied on six standard IEEE transmission and distribution systems and the results are presented.

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Pyramidal approximation for power flow and optimal power flow

Cited by 8 publications

References 47 publications

Risk Assessment for Energy Stations Based on Real-Time Equipment Failure Rates and Security Boundaries

Risk Assessment for Energy Stations Based on Real-Time Equipment Failure Rates and Security Boundaries

An optimal scheduling of renewable energy in flexible interconnected distribution networks considering extreme scenarios

Soccer league optimization for load flow analysis of power systems

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