A two-level SSR protection system and its application at the Shangdu Power Plant

Xie, Xiaorong; Liu, Huan; Liu, Hui; Jiang, Qinglin

doi:10.1016/j.ijepes.2014.09.011

Cited by 7 publications

(11 citation statements)

References 20 publications

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“…Therefore, this discrimination can be made using the speed signal as mechanical quantity in the proposed relay. Furthermore, during a power swing, the magnetic flux oscillates at the slip frequency (i.e., 0.3-7 Hz) [44,46], whereas during the SSR conditions, it oscillates at the frequency within 10-40 Hz [8,11].…”

Section: Performances Of the Proposed Protection Functionmentioning

confidence: 99%

“…The results presented in different references [11, 45] show that the SSR voltage amplitude at the machine terminal is straight relative to the shaft movement/twisting, while the current amplitude of the SSR depends on the impedance of the power network. It is worth highlighting that the magnetic flux of a generator depends on its voltage.…”

Section: Performances Of the Proposed Protection Functionmentioning

confidence: 99%

“…In this section, only the merit of the magnetic flux for SSR analysis and how to obtain this signal are studied. This is because the speed signal suitability for SSR analysis has been proven in other references [8, 11]. More details about the use of the shaft speed of either the HIP turbine or the synchronous generator are presented in [8, 11].…”

Section: Magnetic Flux Linkage During Ssr Conditionsmentioning

confidence: 99%

“…In addition, as stated earlier, SSR is a phenomenon that needs the use of both mechanical and electrical quantities for its analysis and it has been proven in the literature that the shaft speed is effective in SSR analysis as a mechanical signal [11]. Consequently, due to the merit of the magnetic flux for fault analysis in electrical machines and to enhance the precision and sensitivity of the SSR analysis, this paper proposes the use of the magnetic flux of the generator as an electrical signal along with the speed signal.…”

Section: Introductionmentioning

confidence: 99%

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Precision enhancement of the traditional sub‐synchronous analysis by using frequency components of instantaneous magnetic flux

Yaghobi

2021

IET Generation Trans & Dist

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Sub-synchronous resonance (SSR) is a great danger to the stable and safe operation of the synchronous generator and power network. Detecting this condition in a fast and precise method is very important for power engineers. During the last decade, many methods have been proposed for SSR detection. The most famous of these methods use shaft speed analysis. On the other hand, it is noteworthy that SSR is a phenomenon that needs the use of both mechanical and electrical quantities for its analysis. Therefore, if both kinds of the signal are used, the protection system reliability can be enhanced significantly and its trip is more efficient and consistent. Subsequently, to enhance the precision and sensitivity of the SSR detection, this paper proposes the use of frequency analysis of the magnetic flux linkage of the generator as an electrical signal along with the shaft speed as a mechanical signal. The magnetic flux is a local index that is available at the relay location and does not require a communication channel to transmit. This index contains a lot of useful information about the performance of the machine. However, the main disadvantage of this index is its accessibility, which requires invasive sensors.

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Section: Performances Of the Proposed Protection Functionmentioning

confidence: 99%

Section: Performances Of the Proposed Protection Functionmentioning

confidence: 99%

Section: Magnetic Flux Linkage During Ssr Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Precision enhancement of the traditional sub‐synchronous analysis by using frequency components of instantaneous magnetic flux

Yaghobi

2021

IET Generation Trans & Dist

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“…However, the TSR cannot address the subsynchronous control interaction (SSCI). In [15], a twolevel SSR protection system has been applied to detect the SSR phenomenon based on both the shaft speed, terminal voltages, and armature currents. Although this method is effective, the philosophy and setting of protection are complicated, and some parameters depend on the engineering experience.…”

Section: Introductionmentioning

confidence: 99%

An Improved Fast Detection Method on Subsynchronous Resonance in a Wind Power System With a Series Compensated Transmission Line

Abdeen

Chai

et al. 2019

IEEE Access

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Subsynchronous resonance (SSR) occurs mainly in series compensated transmission line connected to the wind power system. This phenomenon (SSR) can lead to electrical instability and potential turbine generator shaft failure. Thus, the protection system is an essential part to avoid the harm of SSR. In this paper, an improved fast detection method is proposed to detect the SSR phenomenon in a very short time. It consists of two stages; first, the positive or negative half-cycle time of each cycle of voltage signal is detected based on four steps, namely, signal conversion, comparison, integrator, and sample and hold; second, the obtained time is compared with the damping and trip threshold values, and the best action is determined (addressing or trip) based on the value of half-cycle time. The effectiveness and superiority of the improved fast SSR detection method are validated at different compensation levels and compared with the traditional method and subsynchronous oscillation relay (SSO). The simulation results prove that the improved method is more efficient in all types of SSR phenomenon; induction generator effect (IGE), control interactions (CI), and torsional interaction (TI) at different compensation levels. In addition, a comparative study among these three types of SSR with the proposed method is carried out, and the obtained results show that the CI is a suitable type with the proposed method.

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Improved subsynchronous oscillation detection method in a DFIG-based wind farm interfaced with a series-compensated network

Abdeen

Liu

2020

International Journal of Electrical Power & Energy Systems

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A two-level SSR protection system and its application at the Shangdu Power Plant

Cited by 7 publications

References 20 publications

Precision enhancement of the traditional sub‐synchronous analysis by using frequency components of instantaneous magnetic flux

Precision enhancement of the traditional sub‐synchronous analysis by using frequency components of instantaneous magnetic flux

An Improved Fast Detection Method on Subsynchronous Resonance in a Wind Power System With a Series Compensated Transmission Line

Improved subsynchronous oscillation detection method in a DFIG-based wind farm interfaced with a series-compensated network

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