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This paper compares the operating characteristics of non-conventional current sensors, Rogowski Coils, and conventional iron-core current transformers for protective relaying applications.
This paper presents modern techniques to study step voltage regulator (SVR) - distributed generation (DG) interactions in distribution systems using electromagnetic transient programs. Digital models represent physical characteristics of both SVR and DG and the associated control systems. These modeling techniques may effectively simulate realistic aspects of SVR and DG real time operations.
Because traditional electric power distribution systems have been designed assuming the primary substation is the sole source of power and short-circuit capacity, DR interconnection results in operating situations that do not occur in a conventional system. This paper discusses several system issues which may be encountered as DR penetrates into distribution systems. The voltage issues covered are...
This paper describes advanced relay protection systems that incorporate Rogowski coils and multifunction relays. The schemes are simple, user friendly and require less wiring and space than conventional solutions. Novel protection schemes for low, medium, and high voltage power system applications are presented. A companion paper presents Rogowski coils current sensor performance characteristics for...
This paper presents Rogowski coil current sensor performance characteristics for advanced relay protection systems. Rogowski coils are specially designed to be immune to external electromagnetic fields. They are accurate and do not saturate. Principles of applications for phasor-based and traveling wave-based relaying schemes are presented. A companion paper [Kojovic, 2008] describes advanced protection...
This paper compares performance characteristics of conventional current transformers and Rogowski coils used for protective relaying purposes. Rogowski coils have low-power outputs. They are linear (do not saturate like conventional iron- core current transformers), are compact in size, and light in weight. This paper describes current technology and application for Rogowski coils, which serve in...
This paper presents coordination of distributed generation (DG) and step voltage regulator (SVR) operations for improved distribution system voltage regulations. Examples include DG with induction and synchronous generators and SVRs with different control modes
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