Journal ArticleDOI
Damping of subsynchronous resonance using excitation controllers and static VAr compensations: a comparative study
L. Wang,Yuan-Yih Hsu +1 more
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TLDR
In this article, a comparative study on the application of two countermeasures, i.e., the excitation controller and the static VAr compensator (SVC), for damping of subsynchronous resonance (SSR) is presented.Abstract:
The results of a comparative study on the application of two countermeasures, i.e. the excitation controller and the static VAr compensator (SVC), for damping of subsynchronous resonance (SSR) are presented. To stabilize all the SSR modes, a unified approach based on modal control theory is proposed for the design of the excitation controller and the SVC, which are essentially dynamic output feedback compensators. The two damping schemes differ in the way they modulate the reactive power flow in the system to damp out the subsynchronous oscillations. To demonstrate the effectiveness of the proposed damping schemes under disturbance conditions, time-domain simulations based on a nonlinear system model are also performed. The relative merits of the two countermeasures are compared with respect to their validities under various loading conditions and different degrees of series compensations and their capabilities to expand the stable region on the real-capacitive reactance plane. >read more
Citations
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Journal ArticleDOI
Application of static phase shifters on the damping of common‐mode torsional oscillations
TL;DR: In this paper, a study on the application of thyristor-controlled static phase shifters (SPS) to stabilize the common-mode torsional oscillations occurring in a series-capacitor compensated power system is presented.
Proceedings ArticleDOI
Performance verification of SEDC equipment for damping multimodal SSR
Abstract: The supplementary excitation damping controller (SEDC) has been proven to be one of the most economical and convenient measures for damping of subsynchronous resonance (SSR) SEDC is a supplementary function of regular excitation system It is necessary to verify the performance of SEDC equipment before field test In this paper, a verification method and results of one practical SEDC equipment are introduced Firstly, frequency characteristics of SEDC's discrete mathematics model are tested by using dynamic signal analyzer Then this paper uses real time digital simulator (RTDS) to build a series-compensated transmission system with real engineering background, and conducts time-domain simulation studies on performance of SEDC under disturbance
Journal ArticleDOI
Damping of common‐mode torsional oscillations using a modified NGH SSR damping scheme
TL;DR: In this article, a modified NGH SSR damping scheme was proposed for damping common-mode torsional oscillations that occur in a power system containing series-capacitor compensation.
Proceedings ArticleDOI
New approach to damp subsynchronous resonance by reshaping the output impedance of voltage-sourced converters
TL;DR: In this paper, the effect of a voltage-source converter (VSC) on subsynchronous resonance and system damping interaction in a series-compensated system with multi-mass synchronous generator is investigated.
Journal ArticleDOI
Self‐tuning static VAR controllers for a multimachine power system
Chin‐Hsing Cheng,Yuan‐Yin Hsu +1 more
TL;DR: In this article, a static VAR compensator equipped with a supplementary feedback controller is proposed to improve the damping of a multimachine power system, and two types of adaptive controllers are developed.
References
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Journal ArticleDOI
Application of a Thyristor Controlled Var Compensator for Damping Subsynchronous Oscillations in Power Systems
A. E. Hammad,M. El-Sadek +1 more
TL;DR: In this article, a new concept for controlling static VAr compensators (SVC) in power systems is presented, which allows thyristor controlled VAR compensators to effectively damp subsynchronous resonance (SSR) oscillations besides controlling the system voltage.
Journal ArticleDOI
Static Reactive Compensation for Power Transmission Systems
TL;DR: In this paper, the application of static reactive compensators (SVCs) to power transmission systems is discussed, and it is shown that SVCs can provide significant benefits in terms of increased transient stabilty and improved damping for synchronizing power flow oscillations.
Journal ArticleDOI
Damping Subsynchronous Resonance Using Reactive Power Control
TL;DR: In this paper, the authors demonstrate a method of damping subsynchronous resonance using a set of phase controlled reactors connected to the machine terminals, which can prevent one mode of instability by modulating the reactive power consumed by the reactors in proportion to the change in generator speed.
Journal ArticleDOI
Application of a Static VAR System to Regulate System Voltage in Western Nebraska
TL;DR: In this article, a Static Var System (SVS) was used to provide automatic, continuous voltage control on a 115 kV network in western Nebraska. But, the SVS was not designed for continuous voltage regulation.
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