Contribution of Power System Stabilizers to the Damping of Torsional Oscillations of Large Turbo Generators

El-Serafi, A.M.; Niamat, Mohammed; Haq, Enamul

doi:10.1080/07313568608909203

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…Based on linear system theory, the plant f L can achieve asymptotical stability by an appropriate control law v of (10). According to (8) and (9), the zero dynamic system can be expressed asż…”

Section: Control Law Designmentioning

confidence: 99%

“…In order to analyze and prevent catastrophic accident, some methods for calculating and analyzing torsional vibration of turbo-generator shafts were presented [5][6][7]. To alleviate or suppress torsional vibrations of large turbo-generator set shafts, many countermeasures have been proposed such as power system stabilizer (PSS) [8], voltage source converter (VSC) [9], static synchronous series compensator (SSSC) [10][11][12], single-pole switching technique [13], braking resistor [14], superconductive energy storage system [15], the nonlinear ZnO over-voltage protection of series capacitors [16], and high temperature super-conductive fault current limiter [17] etc. Most of them are based on the modulation of the effective and reactive powers to bring supplementary damping into the system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Qin

et al. 2021

IEEJ Transactions Elec Engng

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Non-member Yejie Tian, Non-member The problem of shafting torsional vibrations has been increasingly emerging due to the increasing capacity of turbo-generator and the complexity of power grid. Therefore, how to reduce the torsional vibration of the turbo-generator shaft and improve the stability of the power system has become the focus of our research. First, in order to solve the problem and alleviate the torsional vibrations of turbo-generator shafts, this paper proposed a new shafting structure model of Double-ended Driving and Dual-Excited Turbo-Generator set (DDDETG). A static excitation mode is used for the excitation of the DDDETG and the mechanical power is supplied symmetrically and synchronously from both ends of the generator rotor. Then, in order to improve the output characteristic of the generator and further suppress the torsional vibrations of the turbo-generator shafts, combined with the nonlinear control design method of partial feedback linearization, a Multi-Index Nonlinear Coordinated Control (MINCC) strategy for the double-ended driving and dual-excited turbo-generator is proposed to ensure good dynamic and static state performances of each state in the system. Finally, the simulation results on a single-machine infinite bus system demonstrate the effectiveness of the proposed control strategy. In addition, this paper compares the performance of DDDETG and the traditional Single-ended Drive and Single-Excited Turbo Generator (SDSETG), the simulation results show that the restraint effect of the DDDETG structure on shafting torsional vibrations is more obvious under the proposed control strategy.

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Section: Control Law Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Qin

et al. 2021

IEEJ Transactions Elec Engng

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“…[2,3] proposed a by‐pass damped filter, which is parallel to the compensation capacitor to suppress the sub‐synchronous oscillation of the system by suppressing the sub‐synchronous current. Other counter‐ measures also have been proposed to alleviate the torsional vibration, such as various voltage source converters based FACTS [4], power system stabilizer (PSS) [5], the nonlinear ZnO over‐voltage protection of series capacitors [6] and superconductive energy storage system [7] etc. It can be seen from the above that most of them are based on the modulation of the effective and reactive powers to bring supplementary damping into the system, little consideration is given to solving the shafting stability problem from the structure of the turbo‐generator itself.…”

Section: Introductionmentioning

confidence: 99%

“…*College of Electrical Engineering, Guangxi University, Nanning, 530004, Guangxi Zhuang Autonomous Region, China **College of Mechanical and Electrical and Quality Technology Engineering, Nanning University, Nanning, 530200, Guangxi Zhuang Autonomous Region, China proposed to alleviate the torsional vibration, such as various voltage source converters based FACTS [4], power system stabilizer (PSS) [5], the nonlinear ZnO over-voltage protection of series capacitors [6] and superconductive energy storage system [7] etc. It can be seen from the above that most of them are based on the modulation of the effective and reactive powers to bring supplementary damping into the system, little consideration is given to solving the shafting stability problem from the structure of the turbo-generator itself.…”

Section: Introductionmentioning

confidence: 99%

Study on torsional vibration suppression effect of double‐ended driving turbo‐generator shafting structure

Qin

et al. 2022

IEEJ Transactions Elec Engng

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In order to reduce the torsional vibration of the turbo-generator shaft and improve the stability of the power system, this paper proposed a more stable shafting structure model of Double ended Driving Turbo-Generator (DDTG) by improving the shafting structure of conventional turbo-generator set. For DDTG, the mechanical power is supplied symmetrically and synchronously from both ends of the generator. Compared with the conventional Single ended Driving Turbo-Generator (SDTG), simulation results verify the effectiveness of the proposed shafting structure model, and indicate that DDTG can effectively reduce the torsional vibration of turbo-generator shafts under the same electrical disturbance. Besides, in order to further suppress the torsional vibration of turbo-generator shafts and improve the system performance, based on the nonlinear control method with objective holographic feedback, a Coordinated Control law of Excitation and Steam-Valve (CCESV) is proposed. Under the action of CCESV, the simulation results show that the restraint effect of the DDTG on shafting torsional vibration is more obvious, and the dynamic and static performance of the system can be effectively improved.

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“…Nowadays, the SSR has emerged as one of the challenging topics in the field of power system dynamics. A vase body structure is utilized to implement various devices such as power system stabilizers (PSSs) [5] and flexible alternating current transmission systems (FACTS) [6][7][8][9][10][11][12] to mitigate the SSR problem.…”

Section: Introductionmentioning

confidence: 99%

SSR mitigation with SSSC thanks to fuzzy control

Hosseini¹,

Samadzadeh²,

Olamaei³

et al. 2013

Turk J Elec Eng & Comp Sci

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This paper deals with the capability of a static synchronous series compensator (SSSC) to attenuate the subsynchronous resonance (SSR). Two well-known controllers are designed, namely a conventional damping controller (CDC) and fuzzy logic damping controller (FLDC). These 2 damping controllers are added to a main control loop of a SSSC operating as a SSR damping controller. It should be noted that, to optimize the parameters of the CDC, a versatile optimization technique is implemented, namely particle swarm optimization (PSO). A comprehensive comparison between the 2 control methods is carried out for different operational conditions. To observe the superior performance of the proposed FLDC, many operating points and different fault types are considered. The IEEE second benchmark model aggregated with the SSSC is utilized and simulations are presented.

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Contribution of Power System Stabilizers to the Damping of Torsional Oscillations of Large Turbo Generators

Cited by 11 publications

References 4 publications

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Study on torsional vibration suppression effect of double‐ended driving turbo‐generator shafting structure

SSR mitigation with SSSC thanks to fuzzy control

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