An insight into the dynamics of loaded and free running isolated self-excited induction generators

Seyoum, D.; Grantham, C.; Rahman, M.F.; Nagrial, M.

doi:10.1049/cp:20020181

Cited by 11 publications

(6 citation statements)

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“…1 shows the upper and lower limits of speed as functions of the capacitor value, for several values of load resistance. The figure is also consistent with the figures of [12].…”

Section: E Examplesupporting

confidence: 91%

“…The minimum speed of 640 rpm is consistent with Fig. 2 of the paper [12]. At ω = 100 rad/s, the roots of det A C (s) are given by −73.4 − 377.9j, −142.1+ 389.1j, and 16.6 +188.7j.…”

Section: E Examplesupporting

confidence: 87%

“…Consider the generator of [12], with R S = 1.7Ω, R R = 2.7Ω, L S = L R = 191.4mH, and M = 180mH. Let R L = ∞ and C = 300µF .…”

Section: E Examplementioning

confidence: 99%

See 2 more Smart Citations

Analytic conditions for spontaneous self-excitation in induction generators

Bodson

Kiselychnyk

2010

Proceedings of the 2010 American Control Conference

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Spontaneous self-excitation in induction generators is a fascinating phenomenon triggered by the instability of a zero equilibrium state. Prediction of this condition for various values of free parameters requires many computations of the eigenvalues of a 6 × 6 matrix over a large space. The paper uses a novel approach to derive analytic conditions and predict precisely when instabilities occur. The formulas give the values of the minimum load resistance, the range of capacitor values, and the range of speeds for which spontaneous selfexcitation appears. The paper concludes with an illustration of the theoretical results on an example.

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“…1 shows the upper and lower limits of speed as functions of the capacitor value, for several values of load resistance. The figure is also consistent with the figures of [12].…”

Section: E Examplesupporting

confidence: 91%

“…The minimum speed of 640 rpm is consistent with Fig. 2 of the paper [12]. At ω = 100 rad/s, the roots of det A C (s) are given by −73.4 − 377.9j, −142.1+ 389.1j, and 16.6 +188.7j.…”

Section: E Examplesupporting

confidence: 87%

See 1 more Smart Citation

Analytic conditions for spontaneous self-excitation in induction generators

Bodson

Kiselychnyk

2010

Proceedings of the 2010 American Control Conference

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“…Understanding the transient behavior of parallel SEIGs helps on the proper design of the power plant. Several papers [6]- [10] have been published on stand-alone operation of self-excited generators and only a few references are available on parallel-operation of SEIGs. Steady-state analysis of parallel-operated SEIGs has been discussed [11], [12] and previous works related to transient analysis do not present clear numerical modeling and experimental observations [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation and Analysis of Parallel Self-Excited Induction Generators for Islanded Wind Farm Systems

Palle

Simões

Farret

2005

IEEE Trans. on Ind. Applicat.

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In this paper, a dynamic mathematical model to describe the transient behavior of a system of self-excited induction generators (SEIGs) operating in parallel and supplying a common load is proposed. Wind turbines with SEIGs are increasingly being used to generate clean renewable energy in rural areas owing to many economical advantages. Parallel operation of SEIGs is required where the size of the machine is a constraint. SEIGs connected in parallel experience various transient conditions such as generator/load/capacitor switching that are not easy to simulate using conventional models. An automatic numerical solution to predict the steady-state and transient behavior of any number of SEIGs connected in parallel is proposed in this paper. The generators can be of different ratings and can have different prime mover speeds. The performance of the proposed model when subjected to various dynamic scenarios is compared with experimental results. The simulation results are in good agreement with the experimental results, confirming the validity of the proposed model. An aggregated model of a small wind power system is also proposed. This model was applied to a two-wind turbine case, which can be extended to simulate a complete wind generating system.

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“…References [7][8][9] developed a wind farm model that can be used in power system dynamic simulations with steady-state representation of the generator, and do not deal with the transient behaviour of SEIGs. Several papers [10][11][12][13][14] have been published on stand-alone operation of selfexcited generators, but only a few references are available on parallel operation of SEIGs. Steady-state analysis of parallel-operated SEIGs has been discussed [15,16], but previous work related to transient analysis does not present clear numerical modelling and experimental observations [17,18].…”

Section: Introductionmentioning

confidence: 99%

Full expandable model of parallel self-excited induction generators

Farret

Palle

Simões

2005

IEE Proc., Electr. Power Appl.

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Self-excited induction generators (SEIG) offer many advantages as variable-speed generators in renewable energy systems. Small hydro and wind generating systems have constraints on the size of individual machines, and several induction generators must be paralleled in order to access fully the potential of the site. SEIGs connected in parallel may lose excitation momentarily owing to large transient currents caused by differences in individual instantaneous voltages and frequency. This phenomenon cannot be easily simulated using the conventional models because it has such a fast transient nature. An innovative and automatic numerical solution for steady-state and transient analysis of any number of SEIGs operating in parallel is presented. Experimental results confirm the accuracy of the proposed model and open new possibilities for incorporating advanced control to monitor and optimise a parallel installation of SEIGs. The proposed SEIG model is applied to a two-turbine case, which can be extended to simulate a wind generating system.

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An insight into the dynamics of loaded and free running isolated self-excited induction generators

Cited by 11 publications

References 0 publications

Analytic conditions for spontaneous self-excitation in induction generators

Analytic conditions for spontaneous self-excitation in induction generators

Dynamic Simulation and Analysis of Parallel Self-Excited Induction Generators for Islanded Wind Farm Systems

Full expandable model of parallel self-excited induction generators

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