Design of Supplementary Excitation Damping Controller for Mitigation of Subsynchronous Resonance

2019 ◽  
Author(s):  
Jaychandran Padayasi ◽  
Shashidhara Mecha Kotian
Keyword(s):  
Subsynchronous Resonance ◽  
Damping Controller

Application of Turbine Torsional Oscillation Damping Controller to Static Var Compensator

2015 ◽  
Vol 137 (10) ◽  
Author(s):  
Amir Ghorbani ◽  
Masoud Arablu
Keyword(s):  
Power Systems ◽  
Transmission Lines ◽  
Torsional Oscillation ◽  
Static Var Compensator ◽  
Subsynchronous Resonance ◽  
Phasor Measurements ◽  
Transient Simulations ◽  
Measurement Units ◽  
Oscillation Damping ◽  
Damping Controller

This paper proposes a new auxiliary turbine torsional oscillation damping controller (TTODC) for static var compensator (SVC) to dampen out subsynchronous oscillations in power systems containing series compensated transmission lines. A new TTODC algorithm on the basis of synchronized phasor measurements received from phasor measurement units (PMUs) is presented. The idea of using remote signals obtained from PMU to dampen subsynchronous resonance (SSR) presented, too. An auxiliary TTODC is proposed for a SVC, using the generator rotor speed deviation signal as the stabilizing and remote signal to dampen subsynchronous oscillations. The performance of the controller is verified in a detailed nonlinear system considering eigenvalue analysis and transient simulations. Sturdiness of the controller is examined by applying the disturbances in the system that causes significant changes in generator's operating point. The IEEE second benchmark (SBM) model is used for the analysis and the SVC is simulated using the power system blockset (PSB) in the matlab/simulink environment.

Design of SVC Damping Controller Based on Biogeography-Based Optimization Algorithm

2014 ◽  
Vol 668-669 ◽  
pp. 470-473
Author(s):  
Wu Gai Yang ◽  
Li Na Ke ◽  
Fei Fei Dong ◽  
Zhi Ping Zheng
Keyword(s):  
Power System ◽  
Optimization Algorithm ◽  
Power Grid ◽  
Time Varying ◽  
Static Var Compensator ◽  
Nonlinear Characteristics ◽  
Subsynchronous Resonance ◽  
Grid Operation ◽  
Safety And Stability ◽  
Damping Controller

On account of that common subsynchronous resonance controllers cannot well adapt to the time-varying and nonlinear characteristics of power system, biogeography-based optimization (BBO) algorithm is introduced to design subsynchronous damping controller optimally based on the mechanism of suppressing SSO by static var compensator (SVC). The simulatied results of Jinjie plant indicate that the subsynchronous damping controller optimized by BBO algorithm can remarkably improve the damping of torsional modals and thus effectively depress the multimodal SSO, ensuring the safety and stability of units and power grid operation.

scholarly journals Design of SVC Controller Based on Improved Biogeography-Based Optimization Algorithm

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Feifei Dong ◽  
Dichen Liu ◽  
Jun Wu ◽  
Bingcheng Cen ◽  
Haolei Wang ◽  
...  
Keyword(s):  
Nonlinear Behavior ◽  
Pso Algorithm ◽  
Subsynchronous Resonance ◽  
Electromagnetic Simulations ◽  
Mutation Strategy ◽  
Cauchy Mutation ◽  
Ga Algorithm ◽  
Grid Operation ◽  
Safety And Stability ◽  
Damping Controller

Considering that common subsynchronous resonance controllers cannot adapt to the characteristics of the time-varying and nonlinear behavior of a power system, the cosine migration model, the improved migration operator, and the mutative scale of chaos and Cauchy mutation strategy are introduced into an improved biogeography-based optimization (IBBO) algorithm in order to design an optimal subsynchronous damping controller based on the mechanism of suppressing SSR by static var compensator (SVC). The effectiveness of the improved controller is verified by eigenvalue analysis and electromagnetic simulations. The simulation results of Jinjie plant indicate that the subsynchronous damping controller optimized by the IBBO algorithm can remarkably improve the damping of torsional modes and thus effectively depress SSR, and ensure the safety and stability of units and power grid operation. Moreover, the IBBO algorithm has the merits of a faster searching speed and higher searching accuracy in seeking the optimal control parameters over traditional algorithms, such as BBO algorithm, PSO algorithm, and GA algorithm.

Damping Subsynchronous Resonance Using a Static Synchronous Series Compensator Based Supplementary Damping Controller

2019 ◽  
Vol 42 ◽  
pp. 122-138
Author(s):  
Mahlomola Masenkane ◽  
Rudiren Pillay Carpanen
Keyword(s):  
Power System ◽  
Computer Aided Design ◽  
Turbine Generator ◽  
Torsional Oscillations ◽  
Subsynchronous Resonance ◽  
Detailed Simulation ◽  
Single Machine Infinite Bus ◽  
Aided Design ◽  
Static Synchronous Series Compensator ◽  
Damping Controller

This paper investigates the effectiveness of a supplementary damping controller around a Static Synchronous Series Compensator (SSSC) in mitigating the torsional oscillations due to interaction of series compensated transmission line with the nearby turbine-generator shafts. The main objective of the controller is to suppress the unstable torsional oscillations with frequencies coinciding with the turbine-generator shaft torsional modes, through modulation of the reactance provided by the SSSC. Detailed simulation studies are done in Power System Computer Aided Design (PSCAD) using a single machine infinite bus (SMIB) power system adopted from the IEEE first benchmark model (FBM) for subsynchronous resonance analysis. The results show that this supplementary damping controller can provide positive damping to the unstable torsional oscillations due to presence of conventional series capacitors in the line or an SSSC or a combination of both the SSSC and conventional series capacitor banks.

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