STATCOM control for power system voltage control applications

Rao, P. Krishna; Crow, M.L.; Yang, Zhiping

doi:10.1109/61.891520

Cited by 403 publications

(165 citation statements)

References 6 publications

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“…Thus, the reliability and security cannot be guaranteed when the network voltage exceeds the rated voltage of each cluster. As a result, the PCU between different voltage levels is incompatible in most present SVG projects [12][13][14][15][16].…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

“…Thus, a lot of advanced methods combined with PI controller are trying to overcome these problems, such as particle swarm optimization [9], neural networks [10], and artificial immunity [11]. In literature [12], adaptive control and linear robust control have been reported for their antiexternal disturbance ability. In literature [13], a popular dead-beat current controller is used.…”

Section: Introductionmentioning

confidence: 99%

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An Advanced Control and Extensible Configuration for Static Var Generator

Zhang

Cui

et al. 2016

Mathematical Problems in Engineering

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An extensible configuration is proposed for static var generator (SVG) with advanced controller included for reactive power compensation of grid. Compared with the traditional configurations, the major advantage of such system configuration is that the power modules are very flexible and easy to extend or reduce without changing the main equipment of SVG under the different voltage levels. Furthermore, in order to solve the problems of modeling uncertainty, nonlinearities, and outside disturbance by using proportion integration (PI) controller, an advanced controller is proposed based on auto disturbance rejection control (ADRC). By controlling the amount and direction of reactive current, the reactive power is generated or absorbed from SVG into power grid with fast response, which can realize the excellent dynamic compensation for both the internal and external interferences. Simulations results show that the proposed controller has better performance of the transient and steady state than PI controller. Moreover, the verification tests are executed in 380 V, 6.5 kVA experiment systems, suggesting that the excellent dynamic performance and strong robustness are achieved.

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Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Advanced Control and Extensible Configuration for Static Var Generator

Zhang

Cui

et al. 2016

Mathematical Problems in Engineering

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“…Rewrite the cost function in format of (10), it shows that the new LQR regulator is aimed in minimize the errors.…”

Section: A Hybrid Fuzzy/lqr Realizationmentioning

confidence: 99%

“…As a promising technology, the control of STATCOM has been discussed in many literatures [7][8][9][10]. In this paper, the damping of torsional oscillations using STATCOM, connected at the middle bus is studied.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Fuzzy/LQR Based Oscillation Damping Controller Using 3-level STATCOM

Ajami¹,

Taheri²

2011

IJCEE

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I. INTRODUCTIONFixed series capacitors have long been used in power systems as a cost-effective option for enhancing power transfer capability of HV transmission systems. However, the series capacitor has caused shaft damage in multistage steam turbine system in couple of occasions through subsynchronous resonance (SSR). SSR is an electric power system condition where the electric network exchanges energy with a turbine generator at one or more of the natural frequencies of the combined system under the subsynchronous frequency of the system [1]. This leads to turbine-generator shaft failure and system instability.Rotor oscillations of generator at a torsion mode frequency, (fm) induce armature voltage components at frequencies (fern) given by:(1) When the subsynchronous component fern is close to electrical resonant frequency, the subsynchronous torques produced by subsynchronous voltage components can be Manuscript received June 8, 2010. Ali Ajami is with the electrical engineering department of Azarbaijan university of Tarbiat Moallem, Tabriz, Iran, phone: +98-914-3183362; fax: +98-412-4327548; e-mail: ajami@azaruniv.edu Naser Taheri is with the electrical engineering department of, Islamic Azad University, Quchan Branch, Iran, e-mail: N.Taheri.1362@gmail.com sustained. This interplay between electrical and mechanical systems is termed as torsional oscillations [2].Flexible AC Transmission Systems (FACTS) technology is an important tool for permitting existing transmission facilities to be loaded, at least under contingency situations, up to their thermal limits without degrading system security [3][4][5][6]. The most striking feature is the ability to directly control transmission line flows by structurally changing parameters of the grid and to implement high-gain type controllers, based on fast switching.The uses of FACTS devices like STATCOM are increasing in the network for enhancing power transfer, voltage stability and damping of power oscillations. As a promising technology, the control of STATCOM has been discussed in many literatures [7][8][9][10]. In this paper, the damping of torsional oscillations using STATCOM, connected at the middle bus is studied. A supplementary fuzzy control signal is added to control circuit to damping oscillations caused by series compensator capacitance. To improve STATCOM controller, hybrid Fuzzy/LQR controller is proposed. II. DYNAMIC MODELLING OF STATCOMThe system considered is an IEEE benchmark used to study subsynchronous resonance. The modeling aspects of the electromechanical system are given in detail in reference [11]. This system is shown in Fig.1. One convenient method for studying balanced three-phase system (especially in synchronous machine problems) is to convert the three phase voltages and currents into synchronous rotating frame by abc/dq transformation. Computer and Electrical Engineering, Vol. 3, No. 2, April, 2011 1793-8163 185 are decoupled so that the use of classic control method is possible, and even more physical meaning for each control...

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“…PID controller has been selected because of few reasons: (i) the settling time is faster than PI and PD controllers, (ii) less percent overshoot, (iii) faster time to steady state [6], and (iv) the response time is less than PI controller which is about 0.1sec [7] and this is an important parameter to voltage sag/fault. The function of poles and zeros arrangement is used to shift the initial poles from the right to the left of the complex diagram, in order to increase the stability of the system.…”

mentioning

confidence: 99%

Study of poles and zeros arrangement method for PID controller on TCSC

Zulkifli

Ching

Ahmad

et al. 2008

2008 13th International Conference on Harmonics and Quality of Power

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--TCSC seems to be one of the members of FACTS family. It has many benefits in power quality problems including the increase of power and transient stability as well as in the subsynchronous resonance mitigation. However, these advantages are highly depending on the controller used. This paper deals with Proportional Integral Derivative (PID) controller which is attempted to correct the error between a measured process variable and a desired set point by calculating and gives correct action that adjusts the response to the voltage sag or fault. Voltage sag is one of the most common power quality problems facing by industrial and commercial loads nowadays. The PID controller has been utilized to present the single phase Thyristor Controlled Series Capacitor (TCSC) with the new poles and zeros arrangement on the PID controller to investigate the effects of fault (during and post-fault) at the transmission line as well as at the distribution loads. As the results the new topology has solve the post fault effects on the distribution system.

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STATCOM control for power system voltage control applications

Cited by 403 publications

References 6 publications

An Advanced Control and Extensible Configuration for Static Var Generator

An Advanced Control and Extensible Configuration for Static Var Generator

A Hybrid Fuzzy/LQR Based Oscillation Damping Controller Using 3-level STATCOM

Study of poles and zeros arrangement method for PID controller on TCSC

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