98/01309 Effect of mode inertia on the analysis of torsional dynamics in series capacitor compensated power systems

1998 ◽  
Vol 39 (2) ◽  
pp. 115
Keyword(s):  
Power Systems ◽  
In Series ◽  
Series Capacitor

scholarly journals Distance Protection of Series Capacitor Compensated Lines: Practical Considerations, Industrial Status and Development

Electricity ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 168-186
Author(s):  
Md Tanbhir Hoq ◽  
Nathaniel Taylor
Keyword(s):  
Transmission Lines ◽  
Transmission Network ◽  
Distance Protection ◽  
Academic Literature ◽  
System Protection ◽  
The Status ◽  
In Series ◽  
Insight Into ◽  
Series Capacitor ◽  
Current Inversion

The introduction of series capacitors in transmission lines causes problems in terms of reliability and the security of distance protection relays. As distance protection is widely used in the transmission network, the challenge of applying it to series compensated lines has been taken up by utilities and relay manufacturers in various ways. In the field of power system protection, developments are largely driven by relay manufacturers, and are often not published in the academic literature; the status and trend of the relay manufacturer’s development are better found in their product manuals and patent activity. Further insight into specific implementations by transmission utilities can be found from publications in industry-led forums and some academic journals. This article surveys the status and development of distance protection for series compensated lines, with a focus on industrial implementation and practical considerations. Factors that influence the protection of series compensated lines are presented. Implementation examples reported by utilities are summarized as examples of the different situations encountered and the methods used to deal with them. It is observed that many utilities use communication-aided protection in series compensated lines, and distance protection is used with reduced reach. Solutions described in relay manuals are presented to demonstrate the manufacturers’ approaches to problems associated with series capacitor protection. While there are methods to counter voltage inversion, current inversion seems to represent a more serious challenge. A patent overview indicates the trends in this domain to be moving towards time-domain-based faster protection methods.

scholarly journals Calculation of Stable Domain of DFIG-Based Wind Farm in Series Compensated Power Systems

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 34900-34908
Author(s):  
Bin Sun ◽  
Ping Ju ◽  
Mohammad Shahidehpour ◽  
Xueping Pan
Keyword(s):  
Power Systems ◽  
Wind Farm ◽  
Stable Domain ◽  
In Series

A System-Wide Protection Against Unstable SSCI in Series-Compensated Wind Power Systems

2018 ◽  
Vol 33 (6) ◽  
pp. 3095-3104 ◽  
Author(s):  
Xiaorong Xie ◽  
Wei Liu ◽  
Hui Liu ◽  
Yanling Du ◽  
Yunhong Li
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
In Series ◽  
Wind Power Systems

scholarly journals Optimal Voltage Stability Improvement under Contingencies using Flower Pollination Algorithm and Thyristor Controlled Series Capacitor

2018 ◽  
Vol 12 (2) ◽  
pp. 497
Author(s):  
Zulkiffli Abdul Hamid ◽  
Ismail Musirin ◽  
Muhammad Amirul Adli Nan ◽  
Zulkifli Othman
Keyword(s):  
Power Systems ◽  
Voltage Stability ◽  
Reactive Power ◽  
Computation Time ◽  
Flower Pollination Algorithm ◽  
Stability Problems ◽  
Total Transmission ◽  
Flower Pollination ◽  
Thyristor Controlled Series Capacitor ◽  
Series Capacitor

Recent power systems necessitate for maintaining a safe voltage stability as the number of problems such as contingencies and reactive power insufficiency are increasing. In this paper, installation and sizing of Flexible Alternating Current Transmission System (FACTS) devices have been introduced for solving the voltage stability problems under contingencies. The FACTS device to be used is Thyristor Controlled Series Capacitor (TCSC). Besides improving the voltage magnitude at all buses to a desired level, installation of TCSC at proper locations can minimize total transmission losses of the system. To conduct the sizing task, the newly developed Flower Pollination Algorithm (FPA) has been implemented as the engine for optimization. Through experimentation, the results proved that the proposed placement and sizing technique has successfully mitigated the voltage stability problems. In addition, the computation time for FPA’s convergence was tolerable with optimum results.

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

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2847 ◽  
Author(s):  
Minh-Quan Tran ◽  
Minh-Chau Dinh ◽  
Seok-Ju Lee ◽  
Jea-In Lee ◽  
Minwon Park ◽  
...  
Keyword(s):  
Power Systems ◽  
Nuclear Power ◽  
Operating Conditions ◽  
Power Generator ◽  
Subsynchronous Resonance ◽  
Thyristor Controlled Series Capacitor ◽  
Electrical Damping ◽  
Svr Controller ◽  
System Configurations ◽  
Series Capacitor

This paper presents a detailed analysis results of the effect of a thyristor-controlled series capacitor (TCSC) on subsynchronous resonance (SSR), which was first applied to a Korean power system. First, the TCSC parameters were calculated, the structure of TCSC with synchronous voltage reversal (SVR) controller was presented, and the torsional characteristics of Hanul nuclear power generator rotor were studied to investigate the natural frequency and mode shape. The test signal method was used to determine the electrical damping in the frequency range of SSR operation through an electromagnetic transient analysis program in various system configurations. The SSR phenomenon was analyzed by comparing the electrical and mechanical damping of a conventional fixed series capacitor (FSC), and the case of a TCSC installed, and the effectiveness of the TCSC without any risk of SSR was demonstrated. As a result, when installing FSC, SSR occurred under sensitive operating conditions, but SSR was prevented in the case of TCSC compensation with SVR. The results obtained in this study can be effectively applied to the installation of TCSC in real power systems.

Improving the power factor correction in the presence of harmonics by reducing the effect of resonance and harmonics

2016 ◽  
Vol 3 (2) ◽  
pp. 282
Author(s):  
Saber M. Saleh ◽  
Mohamed E. Arafa
Keyword(s):  
Power Systems ◽  
Power Factor ◽  
Electrical Networks ◽  
Current Harmonics ◽  
In Series ◽  
Filter Type ◽  
Protective Relays ◽  
Tuning Frequency ◽  
Power Factor Improvement ◽  
Voltage Harmonics

Harmonics in electrical networks occur as a result of non-linear loads.  It has an effect on power factor improvement using capacitors in terms of increasing the unbalance current between units. In addition, the occurrence of resonance and result in the exit of capacitors from service by the protective relays to protect the units from collapse. The main objective of this research is the real-time study of improving the power factor with reducing the effect of the resonance and harmonics on the power system. This reduction can be done using filters, consist of reactors and capacitors connected in series or in parallel or series and parallel together to reduce the current harmonics or voltage harmonics. Single Tuned filter type (passive filter) is used which presents very low impedance at the tuning frequency, through which all current of that particular frequency will be diverted. This research presents two practical power systems 11kV source in Fayoum substation and 13.8kV source in New Badr substation connected to power factor Improvement circuit. These models simulated by Matlab at different unbalance currents and harmonics. Also, it presents the design of the series reactor and the harmonics filter which satisfy the minimum effect of resonance and harmonics.

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