This paper presents the development of adaptive distance relay for protection of parallel transmission line with mutual coupling. The proposed adaptive relay, automatically adjusts its operation based on the acquisition of the data from distance relay of adjacent line and status of adjacent line from line circuit breaker IED (Intelligent Electronic Device). The zero sequence current of the adja...

Abstract In the DC distribution network, ability of converters to withstand overcurrent is very poor. When a fault occurs in line, converter protection and line cannot be easily coordinated, making it difficult ensure selective removal. This paper investigates for connected with DAB converter. First, current limiting scheme using phase shifting constant control proposed. Then based on similarit...

Abstract This paper introduces a new idea of energy efficiency evaluation high voltage direct current (HVDC) converter based on deep neural networks. analyzes the leading operating indicators and finds main influencing factors in constructing energy-saving hands each table. Then this uses network method to establish table's model. The for table is obtained. In paper, PSCAD/EMTDC was used simula...

As a result of increasing environmental concern, more and more electricity is generated from wind turbines. Therefore, adequate models to study the impact of wind turbines on electrical power system behavior are needed. One of the most important considerations is the effect of wind turbines on the voltage profile, i.e. the induced slow voltage variations, which are the subject of this paper. Th...

The design of a Dynamic Voltage Restorer that is suitable for compensating regional voltage sags in 10kV distribution system is introduced in this paper. The design of the main circuit based on cascaded H-bridge, the device for energize DVR and the transformer-less coupled circuit are presented. For the voltage sags in neutral point non-grounded system, a reference voltage calculation method wi...

Multi-microgrid has many new characteristics, such as bi-directional power flows, flexible operation modes and variable fault currents with different control strategy of inverter interfaced distributed generations (IIDGs). All these featuring aspects pose challenges to multi-microgrid protection. In this paper, current and voltage characteristics of different feeders are analyzed when fault occ...

This paper discusses the incorporation of a Superconducting Magnetic Energy Storage (SMES) coil into a voltage source inverter based static synchronous compensator (StatCom) in damping dynamic oscillations in power systems. A 100 MJ 96 MW (peak) SMES coil is attached to the voltage source inverter front end of a 160 MVA StatCom via a dc-dc chopper. The performance of the StatCom, a self-commuta...