Analysis and Mitigation of Subsynchronous Resonance in a Korean Power Network with the First TCSC Installation

Tran, Minh–Quan; Dinh, Minh-Chau; Lee, Seok-Ju; Lee, Jea-In; Park, Minwon; Lee, Chur Hee; Yoon, Jong-Su

doi:10.3390/en12152847

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…In another practical example, SSR analysis was carried out to investigate the torsional characteristics of the Hanul nuclear power plant in Japan [34]. Increased probability of torsional interaction between the generator and a fixed series capacitor was identified, where, depending on the operating condition, f r ranged between 35 and 39 Hz.…”

Section: Mitigating Torsional Ssr With Picmentioning

confidence: 99%

Evaluation of Phase Imbalance Compensation for Mitigating DFIG-Series Capacitor Interaction

2020

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The phase imbalance compensation concept is proposed in literature as an alternative way to mitigate classical subsynchronous resonance (SSR) problems in series-compensated transmission lines. However, a fundamental analysis to determine this concept’s ability to mitigate resonances between a doubly-fed induction generator (DFIG) and a series compensated transmission line, i.e., DFIG-SSR, is not reported in literature. Therefore, the objective of this paper is to investigate to which extent phase imbalance compensation is able to mitigate DFIG-SSR. For the phase imbalance compensation scheme, an analytical model that captures the relation between the level of series compensation, the degree of asymmetry between the compensated phases, and the resulting shift in resonance frequency is developed and validated using time domain simulations. Then, an optimisation framework is developed to search for an adequate level of compensation asymmetry, capable of mitigating the adverse interactions. The optimisation allows us to show that, even with the best set of parameters, phase imbalance compensation is not suitable for mitigating DFIG-SSR. The analytical model enables us to explain the underlying physical reasons for this and an attempt is made to explain why this concept is theoretically able to mitigate classical resonance issues. Lastly, directions for future research are identified.

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Section: Mitigating Torsional Ssr With Picmentioning

confidence: 99%

Evaluation of Phase Imbalance Compensation for Mitigating DFIG-Series Capacitor Interaction

2020

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“…Such techniques modulate the firing angle to introduce damping. In references [10], [11], [14], a special thyristor control technique called Synchronous Voltage Reversal (SVR) is used to control the TCSC by controlling the zero crossings of the capacitor voltage. However, in this work, the conventional direct control of the firing angles of thyristors is analysed.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Inherent Damping Introduced by Thyristor Controlled Series Compensators

Weerakoon

Karawita

Annakkage

2023

IEEE Open J. Power Energy

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Series compensation of transmission lines increase the risk of Sub-Synchronous Resonance (SSR) problems. Use of Thyristor Controlled Series Compensators (TCSC) in place of Fixed Series Capacitors (FSC) has benefited in terms of damping SSR. SSR Damping with TCSC can be achieved with supplementary controls or through its inherent damping capability. Use of discrete time models for small signal stability analysis of TCSC is well established. This paper uses a simplified Dynamic Phasor (DP) model of the TCSC for an in-depth evaluation of the inherent SSR damping capability through small signal stability analysis. Source of inherent damping in open loop operation and the representation of it in the DP model is elaborated and the small signal model is validated against Electro Magnetic Transient (EMT) simulations. Effect of inductive-resistive nature of the TCSC on Induction Generator Effect (IGE) and Torsional Interactions (TI) is shown through small signal stability assessment. It is shown that the network resonant frequency exists only in a narrow range of firing angles of the TCSC and thus IGE and TI are avoided in most part of its operating range. IEEE first benchmark system for SSR studies is used to demonstrate the inherent damping capability of a TCSC.

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“…Recently, energy generation with renewable energy sources has played a vital role in power systems worldwide. Wind energy-based power generation occupies a significant part in energy production next to the power generation by solar [1,2]. The wind energy generation system [WEGS] with a doubly fed induction generator (DFIG) has been widely utilized for power production.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Logic Controlled Statcom With a Series Compensated Transmission Line Analysis

AROCKIARAJ,

MANIKANDAN,

BHUVANESH

2023

RRST-EE

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The integration of wind farms with transmission networks exhibits several problems. The sub-synchronous resonance (SSR) plays a vital role in those issues, and it must be reduced. Two effective flexible ac transmission system (FACTS) based voltage control devices, namely static synchronous series compensator (SSSC) and static compensator (STATCOM) are proposed in this paper to mitigate the SSR. Detailed eigenvalue analysis was conducted to prove the successful mitigation of SSR by two controllers in a series of compensated wind farms. To find the dominant control scheme, the eigenvalues of the proposed controllers are compared with PSCAD/EMTDC simulations. Finally, a comparison study is carried out between the two proposed SSR controllers.Further, the fuzzy logic control based on STATCOM and SSSC is also developed to enhance the stability margin of the wind turbine. The results have been validated with the IEEE 1st SSR benchmark system. From the results, it is proven that Fuzzy Logic Controller (FLC) based SSSC exhibits better performance than STATCOM.

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Analysis and Mitigation of Subsynchronous Resonance in a Korean Power Network with the First TCSC Installation

Cited by 8 publications

References 20 publications

Evaluation of Phase Imbalance Compensation for Mitigating DFIG-Series Capacitor Interaction

Evaluation of Phase Imbalance Compensation for Mitigating DFIG-Series Capacitor Interaction

Evaluation of Inherent Damping Introduced by Thyristor Controlled Series Compensators

Fuzzy Logic Controlled Statcom With a Series Compensated Transmission Line Analysis

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