An improved control scheme for a series capacitive reactance compensator based on a voltage source inverter

Rigby, B.S.; Harley, R.G.

doi:10.1109/ias.1996.560186

Cited by 47 publications

(16 citation statements)

References 4 publications

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“…1 is a VSC-based series FACTS device which injects a controllable voltage in quadrature with the line current of a power network. This is equivalent to rapidly providing a controllable capacitive or inductive reactance compensation independent of the line current [2]. Moreover, with a suitably designed external damping controller [3], [4], the SSSC can also be used to improve damping of the low-frequency transient power oscillations in a power network.…”

Section: Sssc and Its Conventional Controlmentioning

confidence: 99%

“…The main objectives of the SSSC internal control [2] (Fig. 1) are to inject a controllable voltage (by injecting a desired compensating reactance ) at the ac terminals of the inverter as well as to keep the dc terminal voltage of the inverter constant at steady state.…”

Section: Sssc and Its Conventional Controlmentioning

confidence: 99%

“…This paper extends the work in [7]- [9] on a missing-sensorfault-tolerant control (MSFTC) for controlling an SSSC in a power network. The MSFTC contains a conventional internal and external control scheme [2], [3] (i.e., without any fault-tolerant design) cascaded with a sensor evaluation and (missing sensor) restoration scheme (SERS). The conventional control scheme provides the correct control actions for the SSSC under the condition that all the required sensor data are available.…”

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confidence: 99%

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Missing-Sensor-Fault-Tolerant Control for SSSC FACTS Device With Real-Time Implementation

Wang

Venayagamoorthy

Harley

2009

IEEE Trans. Power Delivery

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Abstract-Control of power systems relies on the availability and quality of sensor measurements. However, measurements are inevitably subjected to faults caused by sensor failure, broken or bad connections, bad communication, or malfunction of some hardware or software. These faults, in turn, may cause the failure of power system controllers and consequently, severe contingencies in the power system. To avoid such contingencies, this paper presents a sensor evaluation and (missing sensor) restoration scheme (SERS) by using auto-associative neural networks (auto encoders) and particle swarm optimization. Based on the SERS, a missing-sensor-fault-tolerant control is developed for controlling a static synchronous series compensator (SSSC) connected to a power network. This missing-sensor fault-tolerant control (MSFTC) improves the reliability, maintainability, and survivability of the SSSC and the power network. The effectiveness of the MSFTC is demonstrated by a real-time implementation of an SSSC connected to the IEEE 10-machine 39-bus system on a Real Time Digital Simulator and TMS320C6701 digital signal processor platform. The proposed fault-tolerant control can be readily applied to many existing controllers in power systems.Index Terms-Auto-associative neural network, fault-tolerant control, flexible ac transmission system (FACTS) device, missing sensor restoration, particle swarm optimization (PSO), real-time implementation, static synchronous series compensator (SSSC).

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Section: Sssc and Its Conventional Controlmentioning

confidence: 99%

Section: Sssc and Its Conventional Controlmentioning

confidence: 99%

mentioning

confidence: 99%

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Missing-Sensor-Fault-Tolerant Control for SSSC FACTS Device With Real-Time Implementation

Wang

Venayagamoorthy

Harley

2009

IEEE Trans. Power Delivery

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“…The traditional approach to PWM-based SSSC control is to use the modulation index to adjust the compensated apparent impedance, while using the phase shift to charge or discharge the dc capacitor [7]. Since the control effect of and interact with each other, it is desirable to introduce two new constrained decoupled control variables and to obtain the control target, where…”

Section: Ssscmentioning

confidence: 99%

A Reconfigurable FACTS System for University Laboratories

Dong

Crow

Yang

et al. 2004

IEEE Trans. Power Syst.

111

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Abstract-To fully understand the dynamic performance of the multiple flexible ac transmission systems (FACTS) devices, a hardware setup is needed to complement software simulation for university research laboratories. This paper presents the schematic and basic controls of a reconfigurable FACTS system that can be used to realize the major voltage-sourced-converter FACTS topologies: the StatCom, the static synchronous series compensator (SSSC), and the unified power-flow controller (UPFC). Furthermore, the state models and control algorithms for the FACTS devices are proposed. The digital signal processor (DSP)-based control system enables new control methods to be rapidly implemented. The comparison of the experimental and simulation results is also provided to verify the proposed controls. The paper culminates in a list of suggested experiments appropriate for an elective/graduate course in electric power systems.Index Terms-Control, flexible ac transmission system, laboratory development.

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“…On the -frame coordinates, the -axis current corresponds to reactive power and so it can be controlled by . Therefore, the voltage reference for the series device is given by (3) where [V/A] is a feedback gain of reactive power. The phase-angle and cross-coupling control schemes seem to be on the basis of space vectors.…”

Section: B Cross-coupling Controlmentioning

confidence: 99%