Hybrid three phase load flow

Chen, B.-K.; Chen, M.-S.; Shoults, R.R.; Liang, Chih-Chien

doi:10.1049/ip-c.1990.0025

Cited by 36 publications

(6 citation statements)

References 5 publications

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“…The influence of the equivalent single-phase model of asymmetric system on the calculation result has been discussed in [6], [7] and not discussed here. On the other side, the centralized parameter model widely used in power system also causes some calculation errors, but the errors often can be ignored in engineering calculation, and not considered here, neither.…”

Section: Calculationmentioning

confidence: 99%

“…However, the actual system cannot always satisfy the above conditions, and the equivalent single-phase models will mismatch the real system and influence the result of the power system calculations. Reference [6] and [7] point out that the lightly asymmetry in load can cause much bigger unsymmetrical current in generator stator, which will heat the stator, influence its insulation and shorten the life span of the generator. So, more accurate method of calculation and analysis should be based on the three-phase system model.…”

mentioning

confidence: 99%

“…So, more accurate method of calculation and analysis should be based on the three-phase system model. Although great achievements have been obtained on the research of three-phase model of power system elements [8]- [13], the research of three-phase calculation is only limited to state estimation [14], [15], power flow calculation [6], [7] and fault analysis [16]- [19]. Secondly, the grid structure are wide-area distributed and have special operation requirements, for example, power system is an interconnected system, but is controlled regionally, that is, the control center in one area can only get the local system information.…”

mentioning

confidence: 99%

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The influence of model mismatch to power system calculation, part I: on the steady state calculation

Mao

Jiaxi

Guo

2005

2005 International Power Engineering Conference

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Secure and reliable operation of power system is significant for nation's economy development and society stability. To ascertain this, analysis and calculation plays an important role. Power system calculations can be classified into three categories in time domain: for the past, for the present and for the future respectively. And the calculations for the future seem to be more significant to support power system operation and make production arrangement. However, almost all the calculations of power system are based on the mathematic models established from the physical system; and the models may have various errors and mismatch the actual system, especially for the calculations facing the future. The mismatch between calculation model and actual system will influence the analysis result and the operation of power system. In this paper, the influence of two kinds of model mismatches -injection mismatch and grid structure mismatch on the actual system are analyzed for power flow calculation using matrix analysis method. The results show that the calculation errors of injection parameter mismatch are approximately linear to the mismatch quantities, and the calculation errors of grid structure mismatch are closely related to the admittance of the mismatching branch and the phase-angle difference of its node voltage. Because the mismatch between calculation model and real system always exists, so this paper also suggests that we should depend more on measurements rather than calculation models in power system analysis.. Index Terms--error analysis, model mismatch, power flow, power system, WAMS.

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Section: Calculationmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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The influence of model mismatch to power system calculation, part I: on the steady state calculation

Mao

Jiaxi

Guo

2005

2005 International Power Engineering Conference

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“…Lately, there have been a great deal of research on three phase load flow analysis and as a result different methods have been proposed, such as the Newton-Raphson algorithm method [3] , the fast decoupled algorithm [4] and the hybrid algorithm method [5] etc. Most of these methods are modifications based on conventional single phase load flow.…”

Section: Introductionmentioning

confidence: 99%

A novel three phase load flow algorithm based on symmetrical components for distribution systems

Kang

Jiale

Song

et al. 2008

2008 43rd International Universities Power Engineering Conference

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The majority of distribution systems are either unearthed or indirectly earthed, resulting in practically no zero sequence voltages and currents during normal operation. Based on this assumption, a novel three phase load flow algorithm is proposed. The three phase power at the PQ node is first decomposed into positive sequence power, negative sequence power and the coupled power. The load flow for the positive sequence network can then be solved using conventional iterative algorithms, and the negative sequence network load flow can be solved by means of simple algebra. Finally, the three phase load flow is obtained by inverse symmetrical component transformation. In this algorithm, the unbalanced three phase load flow is simplified into positive sequence power flow. With the order of Jacobian matrix reduced from 3n 3n × to n n × , the complexity and computational cost are reduced significantly. The load flow analysis of a real 28-node distribution system confirms the validity of the proposed algorithm.

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“…A number of three-phase power flow methods such as Bus-Impedance Method [1], Newton-Raphson Method [2] [3], Fast-Decoupled Method [4] [6], Gauss-Seidel Method [5], Hybrid Method [7], A Newton approach combining representation of linear elements using linear nodal voltage equation and representation of nonlinear elements using injected currents and associated equality constraints [8], Implicit Bus-Impedance Method [9], Decoupling-Compensation Bus-Admittance Method [9], Fast Three-phase Load Flow Methods [10], and Newton power flow in current injection form [12] etc. have been proposed since 1960s.…”

mentioning

confidence: 99%

Modeling of FACTS in Three-Phase Power Flow and Three-Phase OPF Analysis

Flexible AC Transmission Systems: Modelling and Control

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Hybrid three phase load flow

Cited by 36 publications

References 5 publications

The influence of model mismatch to power system calculation, part I: on the steady state calculation

The influence of model mismatch to power system calculation, part I: on the steady state calculation

A novel three phase load flow algorithm based on symmetrical components for distribution systems

Modeling of FACTS in Three-Phase Power Flow and Three-Phase OPF Analysis

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