The Effect of Current-Limiting Reactors on the Tripping of Short Circuits in High-Voltage Electrical Equipment

Volkov, M. S.; Gusev, Yu. P.; Monakov, Yu. V.; Cho, Gvan Chun

doi:10.1007/s10749-016-0631-9

Cited by 3 publications

(2 citation statements)

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“…The second technical solution is the use of CLD of various types. The devices that can be used as CLD are a current-limiting reactor (CLR) [36], an isolation transformer (powe transformer with increased short-circuit resistance and a transformation ratio of 1/1) high-speed CLDs based on different principles, including power electronics, high-temper ature superconductivity, explosive type, and others [37,38]. Following the characteristics given in the technical documentation for the GRUs, in order to exclude their damage during operation, it is necessary that their design be based on one of the following solutions:…”

Section: Mechanical Damage Of the Grumentioning

confidence: 99%

“…The second technical solution is the use of CLD of various types. The devices that can be used as CLD are a current-limiting reactor (CLR) [36], an isolation transformer (power transformer with increased short-circuit resistance and a transformation ratio of 1/1); highspeed CLDs based on different principles, including power electronics, high-temperature superconductivity, explosive type, and others [37,38].…”

Section: Mechanical Damage Of the Grumentioning

confidence: 99%

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Specific Features of Operation of Distributed Generation Facilities Based on Gas Reciprocating Units in Internal Power Systems of Industrial Entities

et al. 2022

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The creation of a decentralized low-carbon energy infrastructure is the main trend in the development of the electric power industry in many countries. Distributed generation facilities (DGs) based on gas reciprocating units (GRUs) are often built by industrial entities for the efficient utilization of secondary energy resources in order to minimize the environmental impact. Modern GRUs have some advantages, but they have design features that should be factored in when connecting them to the internal power systems of industrial entities. Incorrect consideration of possible operating conditions of GRU in their design can lead to their damage, excessive shutdowns, and disruptions in power supply to essential power consumers with significant damage and losses from undersupply of their products. Excessive shutdowns of GRUs are often caused by a non-selective choice of settings for relay protection devices or by load surges that exceed the allowable ones. With high availability factors, GRUs are disconnected five to eight times more often compared to large gas turbine and steam turbine power units. The large total power consumed by electric motors, as part of the load of an industrial entity, determines the nature and parameters of electromechanical transient processes during emergency disturbances. The presented analysis of issues facing real DG facilities relies on the acts of investigation into the causes of accidents. Calculations have shown that the action of the “Load Agreement Module” in the GRU excitation controller can provoke the occurrence of a voltage avalanche in the internal power system with a complete shutdown of the load. The paper presents recommendations on the choice of control algorithms and voltage settings for the GRU excitation controller. Technical solutions are given to prevent damage and excessive shutdowns of GRU in various operating conditions of the system, and to help ensure a reliable power supply to power consumers. The change in approaches to the design of DG facilities is substantiated in the light of their significant differences from other electric power facilities.

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Section: Mechanical Damage Of the Grumentioning

confidence: 99%