Overcurrent protection scheme for collector lines in wind farm based on fault component current correlation analysis and multi‐agent system

Abstract

Collector line relay failures of large-scale grid-connected wind farms have not received much attention so far. In this study, the adaptability of conventional overcurrent setting method is analysed when used in doubly fed induction generatorbased wind farms, revealing the coordination difficulties between collector line relay and fuse protection of wind turbine (WT) branch as well as the potential maloperation causes of backup overcurrent relays (BOCRs). Then, a novel three-stage setting method of overcurrent relays is proposed. In view of time-bound instantaneous overcurrent relays, a time delay setting approach is put forward considering the time-current characteristic of fuses. Based on the multi-agent system, which is both flexible and effective, comprehensive criteria containing fault component current correlation analysis and differential current criterion are applied to BOCRs. The proposed scheme is validated by the simulation of 46-WT wind farm on DIgSILENT/Powerfactory platform. Simulation results show that the relay is able to trip within 0.32 s and the BOCRs perform well when confronting single fault or even multiple faults.

Identification and nature detection of series and shunt faults in types I, III and IV wind turbines and PV integrated hybrid microgrid with a fuzzy logic‐based adaptive protection scheme

“…The existing [1–6, 19, 37–40] protection schemes are based on three‐phase voltage and current components (six variables) of microgrid systems but proposed scheme uses only the q 0 components (two variables) of fault current for fault detection. In most of the protection schemes, the data exchange is necessary, which needs communication channels but in the proposed scheme there is no exchange of data [7, 9]. Every IED checks change of magnitude and the transient component as the q and 0 components of fault current based on a proposed fuzzy algorithm for fault detection in the proposed scheme.…”

“…One research has been reported by the same authors on the q 0 component measurement of fault current for fault detection in microgrid involving low X/R ratio synchronous generators [8]. Collector line (35 kV) protection of DFIG based wind DGs is proposed in [9]. Considering coordination standard IEC60255‐151:2009, using the different time setting multiplier (TSM) and plug setting multiplier (PSM) values for different faults, a new protection coordination strategy is proposed for offshore wind DFIG‐based DGs [10].…”

A distributed adaptive protection scheme based on multi‐agent system for distribution networks in the presence of distributed generations

“…In order to achieve an efficient and reliable design, the proposed scheme needs a reliable communication network with an appropriate speed for information exchanging, cooperation and coordination between IEDs. MAS is one of the advanced and intelligent technologies which provide a wide range of flexible and real-time communication platforms for automation and PSs, in which the relays could operate based on the information exchanging [26,34,35]. MAS could not only avoid the dependency on centralized processing of system information by using the distributed feature, but also can significantly reduce the communication bandwidth requirements [36].…”

Experimental results and technique evaluation based on correlation function for a backup protection of synchronous generator stator windings

“…The fault situation may lead to disruption of magnitude, frequency, phase shift of sinusoidal waveform of the measured signals in three phase systems. The protective relays have the ability to supervise and identify any disturbance of the electrical power quantities (such as voltage, current, frequency, and power) measured in the power grid [10]. Digital computer techniques, for the SG stator windings protection against series and shunt faults, have been used to overcome the above-mentioned problems of conventional protective schemes [11].…”