This paper describes the design of a new PC-based open-loop digital simulator for relay testing. The simulator is aimed at the users that want flexibility and power of transient relay testing at a price comparable to the price of conventional test sets. The simulator can use several different I/O hardware platforms enabling the users to match simulator configuration with their testing requireme...

In this paper, a real-time tool to detect transmission line relay mis-operation is implemented. The tool uses time-synchronized measurements obtained from both ends of the line during disturbances. The proposed fault analysis tool comes into the picture only after the protective device has operated and tripped the line. The proposed methodology is able not only to detect, classify, and locate t...

Current and voltage transducers provide instrument level signals to protective relays. Protective relay accuracy and performance are directly related to the steady state and transient performance of the instrument transformers. Protective relays are designed to operate in a shorter time than the time period of the transient disturbance during a system fault. Large instrument transformer transie...

The proliferation of compensators, due to their nonlinear characteristics raises concern over the distortion levels they cause in voltages and currents at the transmission level. In this paper, series compensation by Thyristor Controlled Series Capacitor (TCSC) and shunt compensation by STATCOM are investigated in terms of power quality and their effects on protective relays behavior. For each ...

this paper is concerned with development of a technique for performance prediction of current transformers (ct), accurately. in this technique, a new optimized model from view-point of both computation time and memory is introduced in order to simulate the current transformers on digital computers. the introduced software in this paper in combination with relay tester equipments can be used ins...

This paper is concerned with development of a technique for performance prediction of current transformers (CT), accurately. In this technique, a new optimized model from view-point of both computation time and memory is introduced in order to simulate the current transformers on digital computers. The introduced software in this paper in combination with relay tester equipments can be used ins...

This Recommendation provides the error performance objectives for real digital radio-relay links forming part of the high-grade portion of international digital connections at a bit rate below the primary rate within an integrated services digital network. This Recommendation also provides the guidance on the factors in determining performance requirements for real digital radio-relay links for...

This paper discusses test set up and methodology which may be used for wind power plant (WPP) protection system evaluation. The test set up cosists of a digital simulator, a number of physical relays and recorders, as well as software for modeling, simulation, signal editing, etc. Correct operation of the WPP protection system is crucial during grid disturbances to prevent unwanted power source...

Protective relays are designed to quickly and correctly clear the fault and minimize the impact of disturbances on power system. Occasionally, some complex conditions may cause relays to perform unintended or incorrect operation, which may further deteriorate the system condition and even jeopardize the stability of the entire system. This paper discusses three categories of solutions for analy...