System integration and demonstration of a 4.5 MVA STATCOM based on emitter turn-off (ETO) thyristor and cascade multilevel converter

2008 IEEE Power Electronics Specialists Conference

2008

The STATCOM based on voltage source converter is used for voltage regulation in transmission and distribution systems. In this paper, the integration and control of energy storage systems such as supercapacitor into a Distribution system STATCOM (D-STATCOM) with voltage controller is developed to enhance power quality and improve distribution system reliability. This paper develops the control concepts to charge/discharge the supercapacitor by the D-STATCOM, and validates the performance for an integrated D-STATCOM/supercapacitor system for improving distribution system performance. The potential performance improvements are verified by simulation results for rapidly varying arc-furnace loads for voltage flicker mitigation, by supplying fluctuating real power by the D-STATCOM/supercapacitor system.

Section: Supercapacitor Modelingmentioning

confidence: 99%

Integration of supercapacitor with STATCOM for electric arc furnace flicker mitigation

Parkhideh

Bhattacharya

2008 IEEE Power Electronics Specialists Conference

2008

“…However, it cannot react to the fast-varying flicker (1Hz~20Hz) very well with the inherent limit of relatively low bandwidth and hence its dynamic performance for flicker mitigation is limited [2]. The state-of-the-art solution is the STATCOM based on high frequency switching voltage-sourceconverter (VSC) [6]. While SVC performs as a controlled reactive admittance, STATCOM functions as a synchronous voltage source.…”

Section: Eaf System and Field Data Analysismentioning

confidence: 99%

“…The cascaded-multilevel converter (CMC), which is constructed with identical H-bridge voltage source converters (VSCs), is deemed as the most feasible topology for a STATCOM application because of its compact structure, modularity, fast response and clean power quality [6] [12][13][14][15]. Therefore, a CMC-based STATCOM is adopted here.…”

Section: B Statcom Model and Controlmentioning

confidence: 99%

Field Data-based Study on Electric Arc Furnace Flicker Mitigation

Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting

Huang

Bhattacharya

et al. 2006

As an industry customer of utility, electrical arc furnace (EAF), acting as a varying and reactive power sink, is the major flicker source to influence the grid power quality. In this paper, based on the field data recorded at the electric system surrounding EAF, the flicker issues and reactive power compensation requirement are quantitatively analyzed. The possible compensation solutions, including passive filter, SVC (static var compensator), STATCOM (static synchronous compensator) are discussed. Furthermore, a field data-based EAF model is proposed and implemented in the simulation software. The fast-bandwidth STATCOM solution with or without capacitor bank are designed and implemented. With the validated EAF and STATCOM model, the extensive simulations are conducted to study compensator performance and costeffectiveness for EAF flicker mitigation. Finally, the guideline for compensator selection and performance estimation is obtained.

“…An inherent benefit of this topology is that the TUCAP can easily be converted into a STATCOM for reactive power compensation when the UCAP is disconnected. Moreover, since H-bridge modular VSC has the capability of charging/discharging from the AC grid [19], the DC switch can be closed directly without any damping impedance to limit inrush current when the DC-link capacitors are charged equal to the open-circuit voltage of the UCAP string.…”

Section: Ucap Testing and Model Developmentmentioning

confidence: 99%

“…For the 4.5MVA PCS prototype system, three 1.5MVA modular VSCs based on ETO thyristor are designed, built and integrated as a 3-level CMC [16] [19]. The PCS prototype is currently configured as a STATCOM without energy storage for fast reactive power compensation.…”

Section: Ucap Testing and Model Developmentmentioning

confidence: 99%

Modeling and Design of a Transmission Ultracapacitor (TUCAP) Integrating Modular Voltage Source Converter with Ultracapacitor Energy Storage

Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06.

Huang

et al.

Self Cite

Energy storage systems (ESSs) are considered an 'enabling' infrastructure technology that can provide ridethrough electricity during outages, enhance power quality, and improve utility reliability. Transmission ultracapacitor (TUCAP), integrating modular voltage source converters (VSCs) with ultracapacitor (UCAP) energy storage unit, are state-of-the-art power electronics-based EESs for utility high power application. In this paper, modeling and design of a TUCAP is presented. Firstly, the testing results of UCAP are described. The model and parameters of UCAP are extracted from the experimental results of both low-voltage cell and high-voltage string. Secondly, a cascade multilevel converter (CMC) utilizing modular VSCs is proposed for TUCAP's Power Conditioning System (PCS). The potential issues of UCAP for high power operation are discussed. The interface and control technology of a TUCAP combining CMC and UCAP are presented. And the simulation results are given for controller verification. Finally, the experimental results on a scaled-down transient network analyzer (TNA) system are given and validate the model and design of the TUCAP system.