Electrical design analyses studies on ultra high voltage air insulated surge arresters
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Neelam Tiwari
Abstract
Air Insulated substations (AIS) experience over-voltages like lightning, switching and temporary over-voltages. The voltage distribution across air insulated surge arrester (AISA) is highly non-uniform and its non-uniformity increases with increase of rated voltage. To achieve non-uniformity voltage factor within permissible limits, special grading shields like window based shields are proposed. In the present study, 420 / 800 kV surge arrester models with composite insulator housing have been considered to analyze voltage distribution across the metal-oxide (MO) blocks. The electrostatic field and voltage distribution analyses are carried out on AISA by considering various shield designs using numerical techniques. Instead of single grading shield, multiple voltage grading-cum-electric field controlled shields are adopted to achieve uniform electric field and optimized non-uniformity voltage factors in the order of ±8 % irrespective of rated voltage of surge arrester. An electrical model is also developed using PSPICE software to calculate voltage distribution across MO blocks. The validity of the network model developed through PSPICE is validated by comparing with the results obtained from numerical analysis. Different configurations of grading shields are proposed and effect of various parameters like rated voltage i.e. 420/800 kV, height of shield, diameter of shield and type of shield like high voltage, floating, LT shield etc. on non-uniformity voltage factor and electric field distribution of surge arrester are analyzed.
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Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Review
- Offshore wind transmission in the United States. A collectivist culture versus Europe’s individualistic approach?
- Research Articles
- Electrical design analyses studies on ultra high voltage air insulated surge arresters
- An enhanced implementation of SRF and DDSRF-PLL for three-phase converters in weak grid
- Optimal design, techno-economic and sensitivity analysis of a grid-connected hybrid renewable energy system: a case study
- Adaptive power management algorithm for multi-source DC microgrid system
- Pre-and post-disturbance transient stability assessment using intelligent systems via quick estimating of the critical clearing time
- Thermal ageing performance evaluation of TUK and Nomex-910 papers in natural monoesters
- Oil temperature prediction of power transformers based on modified support vector regression machine
- Parameter optimization of PV integrated Shunt Active power filter with Taguchi SNR
- Seven level aligned multilevel inverter with new SPWM technique for PV, wind, battery-based hybrid standalone system
- Multi-objective optimal capacity allocation of integrated energy system with co-evolution mechanism
