Modelling and control of a cascade-multilevel converter-based STATCOM for electric arc furnace flicker mitigation

IEEE Trans. Energy Convers.

et al. 2008

Self Cite

237

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).

Section: Simulation and Analysismentioning

confidence: 98%

“…For this study, a harmonics-free dynamic model of the CMC-based STATCOM with its internal control, as shown in Fig. 5(b), is implemented on PSCAD/EMTDC [9], [11], [13].…”

Section: Statcom Model and Controlmentioning

confidence: 99%

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

Han

Huang

IEEE Trans. Energy Convers.

et al. 2008

Self Cite

237

“…1. For this study, a harmonics-free dynamic model of the STATCOM [22][23][24] with a battery equivalent circuit, shown in Fig. 4 [25], is implemented in PSCAD/EMTDC.…”

Section: Large Wind Farm In a Weak Systemmentioning

confidence: 99%

STATCOM with energy storage for smoothing intermittent wind farm power

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

Teleke

Anderson

et al. 2008

In this paper, STATCOM with battery energy storage system (BESS) is proposed for smoothing intermittent power output of a large wind farm. The main advantage of the system is that it can inject both real power (by charging/discharging the BESS) and the reactive power to the system. Simulations based on an actual wind farm data indicate that indeed with the proposed control strategy the power output of the wind farm can be smoothed to facilitate 1/2h dispatching of the wind farm. Also, the reactive power compensation provided by the STATCOM helps to smooth out the fast voltage variations at the interconnecting bus.

“…Therefore, STATCOM can adaptively deal with voltage fluctuation independent from system steady-state voltage regulation by operations of MSCs and TCs. An additional benefit of this external scheme is, with well-designed fast voltage bandwidth utilizing the fast switching capability of ETO switches and the synthesization chacrtericstics of CMC toplogy, even the relatively faster voltage fluctuations and flicker [13][17] [18], due to the switchings of MSCs, blade passing tower [5], SCIG startup and so on, could be suppressed automatically together with the short-term (seconds to minutes) voltage fluctuations. Fig.…”

Section: Simulation and Analysismentioning

confidence: 99%

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

Han

Huang

2006 IEEE PES Power Systems Conference and Exposition

et al. 2006

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 STATCOM to facilitate the integration of a large wind farm into a weak power system is studied. First, an actual weak power system with two nearby large wind farms 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, wind farm 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 STATCOM and its control strategy.Index Terms-STATCOM, wind farm, voltage fluctuation, voltage stability, impact study.