A correction current injection method for power flow analysis of unbalanced multiple-grounded 4-wire distribution networks

Sunderland, Keith; Coppo, Massimiliano; Conlon, Michael; Turri, Roberto

doi:10.1016/j.epsr.2015.10.027

Cited by 42 publications

(38 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This choice is optimal in many cases, since well designed grids are normally operating not far from this point. A similar strategy is also adopted by other authors like [13,14] and is implemented the open source code OpenDSS [41,42], in which the linear part of the loads is taken into account by an additional diagonal term in the nodal admittance matrix by virtue of the Norton theorem, while only the extra injection current due to the non linear part of the loads is added to the right hand side of the power flow equations. Indeed, the basic solution algorithm of OpenDSS can be seen as a particularization of the method of Alternating Search Directions when ˛ = diag(S * ø |V b | 2 ) and ˇ → ∞.…”

Section: Proposed Methodsmentioning

confidence: 99%

“…Historically, power flow studies started with Gauss-Seidel (GS) type methods [2,3], Newton-Raphson's methods (NR) [4,5], or fixed point algorithms based on the admittance or impedance matrix, like the Implicit Z bus method (IZB) [6][7][8][9][10][11][12][13][14]. Despite their flexibility and low memory usage, GS methods have low convergence rates compared to NR methods, who enjoy optimal quadratic convergence but come with an increased computational cost due to the need of assembling and solving the Jacobian system at each iteration.…”

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Unified formulation of a family of iterative solvers for power systems analysis

Borzacchiello

Chinesta

Malik

et al. 2016

Electric Power Systems Research

View full text Add to dashboard Cite

This paper illustrates the construction of a new class of iterative solvers for power flow calculations based on the method of Alternating Search Directions. This method is fit to the particular algebraic structure of the power flow problem resulting from the combination of a globally linear set of equations and nonlinear local relations imposed by power conversion devices, such as loads and generators. The choice of the search directions is shown to be crucial for improving the overall robustness of the solver. A noteworthy advantage is that constant search directions yield stationary methods that, in contrast with Newton or Quasi-Newton methods, do not require the evaluation of the Jacobian matrix. Such directions can be elected to enforce the convergence to the high voltage operative solution. The method is explained through an intuitive example illustrating how the proposed generalized formulation is able to include other nonlinear solvers that are classically used for power flow analysis, thus offering a unified view on the topic. Numerical experiments are performed on publicly available benchmarks for large distribution and transmission systems.Peer ReviewedPostprint (author's final draft

show abstract

Section: Proposed Methodsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Unified formulation of a family of iterative solvers for power systems analysis

Borzacchiello

Chinesta

Malik

et al. 2016

Electric Power Systems Research

View full text Add to dashboard Cite

show abstract

“…The consumer distribution conductors are 25mm 2 concentric neutral cable. The network configuration model is consistent with that presented in [22]. The OpenDSS network model incorporates the harmonic profile for the individual loads as defined using the recorded data and simulation.…”

Section: Load and Network Modellingmentioning

confidence: 94%

An analysis of harmonic heating in smart buildings and distribution network implications with increasing non-linear (domestic) load and embedded generation

Chandran¹,

Sunderland²,

Basu³

2018

Renewable Energy

View full text Add to dashboard Cite

Harmonic distortion is generally not taken into account within domestic installations and the associated wiring systems, as its potential is considered sufficiently small to be neglected. Standards to limit harmonic manifestations in the low voltage (LV) network are available, but these can be breached as a consequence of advancements in power electronics in some modern household devices contributing higher levels of harmonic distortion than permitted.While these devices individually might not be considered serious in terms of system level harmonic distortion manifestations, electrical equipment failures and insulation failures-increasingly being derived from harmonic cable heating-suggest a different story. A 10% increase in THD in a circuit will result in an increase of 10% in cable heat. Recently, attempts have been made to offer harmonic derating factors for building electrical circuit design in BS7671, but this approach currently prioritizes large power devices. This article explores the need for harmonic considerations during the design stage of electrical services engineering projects. Best practice suggestions, in the context of the dissemination of heat caused by harmonics related to household load deployments/configurations, are also provided based on the analysis conducted with real household data. This is further extended to a practical distribution network where the effect of harmonic heating at the network level is explored. The results suggest that the harmonics in the distribution network can amass to cause a cumulative effect on the network. Furthermore, it can be observed from the results that in a distribution network containing (domestic) solar photo voltaic (PV) systems, the harmonic heating issue can be reduced. This benefit is not without consequence however, as increasing PV penetration does not reduce the harmonic content of the overall system and therefore presents a further concern that may need to be addressed in due time.

show abstract

“…In low frequencies, the self and mutual impedances with earth return of the conductors are obtained according to Carson-Clem's formulae [34,35]:…”

Section: Magnetic Flux Density Calculationmentioning

confidence: 99%

Passive mitigation for magnetic coupling between HV power line and aerial pipeline using PSO algorithms optimization

Djekidel

Bessedik

Spitéri

et al. 2018

Electric Power Systems Research

View full text Add to dashboard Cite

This paper proposes a methodology based on Faraday's electromagnetic induction law (EMF) for evaluating the induced voltage produced by high voltage power line on an aerial metallic pipeline located parallel in its immediate vicinity under normal operating condition. It also describes the procedure of the induced voltage mi-tigation using the passive loop technique combined with the particle swarm optimization algorithm (PSO). The presence of a pipeline in the vicinity of an overhead power line strongly disturbs the mapping of the magnetic induction produced by this power line. The mitigation efficiency is significantly improved by optimizing the position of the loop conductors, by increasing the number of loops and the use of a shielding magnetic material of high relative permeability. The obtained simulation result is compared with that obtained by the Carson's formulas. A good agreement was obtained.

show abstract

A correction current injection method for power flow analysis of unbalanced multiple-grounded 4-wire distribution networks

Cited by 42 publications

References 13 publications

Unified formulation of a family of iterative solvers for power systems analysis

Unified formulation of a family of iterative solvers for power systems analysis

An analysis of harmonic heating in smart buildings and distribution network implications with increasing non-linear (domestic) load and embedded generation

Passive mitigation for magnetic coupling between HV power line and aerial pipeline using PSO algorithms optimization

Contact Info

Product

Resources

About