Development of a ±100 MVAr static condenser for voltage control of transmission systems

Schauder, C.; Gernhardt, M.; Stacey, E.J.; Lemak, T.; Gyugyi, Laszlo; Cease, T.W.; Edris, A.

doi:10.1109/61.400933

Cited by 374 publications

(96 citation statements)

References 5 publications

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“…Typically, STATCOMs have been used to provide reactive power at a PCC in a transmission network or distribution network for different purposes, e.g., control of voltage, load compensation and addressing LVRT; the most relevant feature is its capability of injecting a controllable reactive current independent of the grid voltage [17,[36][37][38][39]. A STATCOM is formed by a DC/AC converter, a capacitor on the DC side and a reactor on the AC side for filtering the high frequency components related to Insulated Gate Bipolar Transistor (IGBT) commutation.…”

Section: Statcommentioning

confidence: 99%

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

Obando-Montaño¹,

Carrillo²,

Cidrás³

et al. 2014

Energies

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Fixed-speed wind generator (FSWG) technology has an important presence in countries where wind energy started to be developed more than a decade ago. This type of technology cannot be directly adapted to the grid codes, for example those requirements related to the immunity level under voltage dips. That behavior is typically referred as low-voltage ride through (LVRT), and it usually implies certain reactive and active power injection requirements, both during a voltage dip and during the voltage recovery. In this context, a review is presented of the LVRT exigencies present in some of the countries with the most advanced grid codes (Denmark, Germany, Spain and the United Kingdom). In this paper, the capabilities of STATCOM-based devices for fulfilling the LVRT requirements in FSWGs are analyzed. For this purpose, two technologies are considered: a STATCOM with a supercapacitor, which improves its energy storage features; and a STATCOM with a supercapacitor and a DC-DC converter, to achieve higher discharge levels.

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Section: Statcommentioning

confidence: 99%

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

Obando-Montaño¹,

Carrillo²,

Cidrás³

et al. 2014

Energies

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“…These filters are introduced in order to impose a reduced rate of change in the series voltage demand. The angle difference, between the two series converters is found from the required series voltage magnitude using (3). This calculation also depends on the magnitude of the DC-link voltages, , which together with the control angles of each level determines voltage of each individual converter.…”

Section: Control Of Multi-level Upfcmentioning

confidence: 99%

“…The voltages also depend on the depth of modulation, of the converters which is in turn dependent on the control angle, solution found through harmonic elimination. The angle difference is set to control the magnitude of the resultant voltage vector, as expressed in (3). The angle of , is set using (4)…”

Section: A Control Of the Series Converter Voltagementioning

confidence: 99%

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Voltage balance and control in a multi-level unified power flow controller

Soto

Green

2001

IEEE Trans. Power Delivery

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“…In each test change in wind speed, several combination of scaling factors are asummed. Which system is regulated at different wind speed [1,2]. Nevertheless, under the sudden change of load demands and random wind power input, the pitch controller of the wind side able to effectively control the system frequency due to theirs slow response.…”

mentioning

confidence: 99%

Experimental Results of a Wind Energy Conversion System with STATCOM Using Fuzzy Logic Controller

Gawish¹,

Sharaf²,

El-Harony³

2016

Bulletin EEI

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This paper describes a complete implementation of the experimental voltage regulation of a wind energy conversion system using STATCOM. Firstly conventional control technique is used which is proportional plus integral controller. The control technique is performed using a PC computer through IntroductionMoreover, wind power is expected to be economically attractive when the wind speed of the proposed site is considerable for electrical generation and electric energy is not easily available from the grid. Wind system with STATCOM is very reliable because the STATCOM acts as a cushion to take care of variation in wind speed and would always maintain an average voltage equal to the set point. However, in addition to the unsteady nature of wind, another serious problem faced by the isolated power generation is the frequent change in load demands. This may cause large and severe oscillation of power.Several tests are made to validate the system response at different operating conditions. Different choices of the scaling factors of the fuzzy logic controller have been assumed toobtainthe best response of the system. The test results are recorded and plottedfor a wide range in wind speed. Output power, inverter current, inverter voltage, and STATCOM control voltage (Vc) are recorded. In each test change in wind speed, several combination of scaling factors are asummed. Which system is regulated at different wind speed [1,2]. Nevertheless, under the sudden change of load demands and random wind power input, the pitch controller of the wind side able to effectively control the system frequency due to theirs slow response. FACTS devices can be a solution to these problems [3]. They are able to provide rapid active and reactive power compensations to power systems, and therefore can be used to provide voltage support and power flow control, increase transient stability and improve power oscillation damping. Suitably located FACTS devices allow more efficient utilization of existing transmission networks. Among the FACTS family, the shunt FACTS devices such as the STATCOM has been widely used to provide smooth and rapid steady state and transient voltage control at points in the network. In this paper, a STATCOM is added to the power network to provide dynamic voltage control for the wind system, dynamic power flow control for the transmission lines, relieve transmission congestion and improve power oscillation damping.Following sections deals with the experimental tests of the wind system equipped with STATCOM. Proportional plus integral controller schemes are used to improve the voltage regulation and to minimize the voltage fluctuation during variation in wind speed. Several experimental tests are performed to adjust the proportional plus integral gains at optimal operation of the practical system. Each test describe the voltage adjust by injection voltage by STATCOM. In addition, the controlling voltage of the STATCOM is recorded.

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Development of a ±100 MVAr static condenser for voltage control of transmission systems

Cited by 374 publications

References 5 publications

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

Voltage balance and control in a multi-level unified power flow controller

Experimental Results of a Wind Energy Conversion System with STATCOM Using Fuzzy Logic Controller

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