Emitter turn-off (ETO) thyristor: an emerging, lower cost power semiconductor switch with improved performance for converter-based transmission controllers

Chen, B.; Huang, Alex Q.; Atcitty, Stan; Edris, A.; Ingram, Michael

doi:10.1109/iecon.2005.1568983

Cited by 12 publications

(8 citation statements)

References 4 publications

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“…Results obtained by sweeping the wind speed uniformly at all turbines, with and without compensation from the substation capacitor bank, closely matched the SCADA data, as shown in Fig. 1 [2]. Any field test of a new FACTS device might carry additional risks and costs associated with on-site controller tuning and possible problems from unexpected controller interference with other control systems (i.e.…”

Section: Introductionsupporting

confidence: 70%

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Voltage Sensitivity to Capacitor Switching on an Existing Fixed Speed Induction Generator Wind Farm

Steurer

Langston

Anderson

et al. 2007

2007 IEEE Power Engineering Society General Meeting

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Switched capacitors at wind farms employing fixed speed induction generators are intended to provide reactive power support to control and maintain the voltage at the point of common coupling (PCC) within acceptable operational values. Malfunction of the capacitor switching control may lead to voltage depression and, subsequently, to tripping of turbines which could create additional transient power quality disturbances. This paper presents results of simulations of voltage regulation problems of an existing wind farm on the Bonneville Power Administration (BPA) system where voltage regulation problems have led to the study of possible dynamic voltage compensation schemes to minimize the problem. SCADA data for real and reactive powers and voltage have been analyzed against results from simulation models to verify the behavior and confirm the mechanisms associated with the voltage regulation problems. Other aspects associated with the high fidelity modeling of the wind farm and issues about the sizing of a possible dynamic voltage controller are investigated.

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Section: Introductionsupporting

confidence: 70%

“…In this mode, both unit capacitor banks (C aTi and C bTi ) are connected. A more detailed description of the model can be found in [2]. Real-time simulation constraints limit the size of one electrically closely coupled sub-system that can be simulated on one RTDS rack [3].…”

Section: Real-time Simulation Wind Farm Modelmentioning

confidence: 99%

Voltage Sensitivity to Capacitor Switching on an Existing Fixed Speed Induction Generator Wind Farm

Steurer

Langston

Anderson

et al. 2007

2007 IEEE Power Engineering Society General Meeting

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“…There is also voltage fluctuation even without any WF1 generation, which means that the voltage fluctuations of local system are not only caused by generated power fluctuation of WF1, but they are also contributed by WF2 and voltage fluctuations at the remote boundary buses. Therefore, a single STATCOM using emitter turn-off (ETO) thyristor [10] and cascaded-multilevel converter (CMC) [11] is proposed to suppress the voltage fluctuations of the weak loop system.…”

Section: System Descriptionmentioning

confidence: 99%

STATCOM Impact Study on the Integration of a Large Wind Farm into a Weak Loop Power System

Han

Huang

Baran

et al. 2008

IEEE Trans. Energy Convers.

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237

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Recently, renewable wind energy is enjoying a rapid growth globally to become an important green electricity source to replace polluting and exhausting fossil fuel. However, with wind being an uncontrollable resource and the nature of distributed wind induction generators, integrating a large-scale wind-farm into a power system poses challenges, particularly in a weak power system. In the paper, the impact of static synchronous compensator (STATCOM) to facilitate the integration of a large wind farm (WF) into a weak power system is studied. First, an actual weak power system with two nearby large WFs is introduced. Based on the field SCADA data analysis, the power quality issues are highlighted and a centralized STATCOM is proposed to solve them, particularly the short-term (seconds to minutes) voltage fluctuations. Second, a model of the system, WF, and STATCOM for steady state and dynamic impact study is presented, and the model is validated by comparing with the actual field data. Using simulated PV and QV curves, voltage control and stability issues are analyzed, and the size and location of STATCOM are assessed. Finally, a STATCOM control strategy for voltage fluctuation suppression is presented and dynamic simulations verify the performance of proposed STAT-COM and its control strategy.Index Terms-Impact study, static synchronous compensator (STATCOM), voltage fluctuation, voltage stability, wind farm (WF).

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“…A STATCOM is to be installed at the Point of Common Coupling (PCC), where the wind farm is integrated with the utility system [10]. It utilizes a new power electronic device, the Emitter Turn-Off thyristor (ETO), developed by North Carolina State University, for enhanced high-power switching performance, simplified triggering technology, and overall reduced device and system costs [11]. Figure 1 illustrates the system situation.…”

Section: Introductionmentioning

confidence: 99%

Applying a STATCOM for stability improvement to an existing wind farm with fixed-speed induction generators

Langston

Steurer

2008

2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century

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Wind farms are becoming important distributed renewable energy resources. However, voltage stability issues with wind farms employing fixed-speed induction generators may require such systems to be augmented with dynamic compensation devices, such as STATCOM units. In preparation for deployment of a 10 MVA STATCOM at an existing wind farm in the Bonneville Power Administration (BPA) system, the STATCOM controller is to be tested through hardware-in-theloop simulation with a real-time digital simulator, which will model both the BPA system and wind farm with high fidelity, transient models. This paper presents groundwork conducted in preparation for the dynamic testing of the controller, including studies of the stability improvement facilitated by the introduction of the STATCOM into the BPA system. The enhancement of voltage stability and induction generator stability by the STATCOM is studied analytically by powervoltage and torque-slip relationships of a simple wind power system, as well as through simulation studies with the real-time simulation to be used for testing of the controller. Simulation results from both approaches are compared and illustrate the potential benefit of the STATCOM in preventing voltage collapse caused by serious network changes, such as opening a line, as well as improvement of the Fault Ride Through capability of the wind power system. Index Terms-fault ride through, high fidelity simulations, RTDS, stability, STATCOM, wind farm.

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Emitter turn-off (ETO) thyristor: an emerging, lower cost power semiconductor switch with improved performance for converter-based transmission controllers

Cited by 12 publications

References 4 publications

Voltage Sensitivity to Capacitor Switching on an Existing Fixed Speed Induction Generator Wind Farm

Voltage Sensitivity to Capacitor Switching on an Existing Fixed Speed Induction Generator Wind Farm

STATCOM Impact Study on the Integration of a Large Wind Farm into a Weak Loop Power System

Applying a STATCOM for stability improvement to an existing wind farm with fixed-speed induction generators

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