An adaptive relaying for the protection of a wind farm interconnected with distribution networks

Abstract

This paper proposes the adaptive relaying of protective devices applied in the neighboring distribution feeders for reliable and efficient operations of a wind farm interconnected with distribution networks by dedicated lines. The wind farm connected with the electric power network is one of the great alternative energy sources; however, it would be also highly possible that the wind turbine generators are influenced by abnormal grid conditions such as disturbances occurring in the neighboring distribution feeders as well as the dedicated power. Particularly, in case of the fault happening in the neighboring distribution feeders, a wind farm might be accelerated until the fault is cleared by protective devices. Therefore, the delayed operation time of protective devices for satisfying the coordination might overly expose the interconnected wind turbine generators to the fault and cause damage to them. This paper describes the proper delayed operation time of protective relay satisfying the coordination of the distribution networks as well as reducing damage on the interconnected wind farm. The simulation results for Hoenggye substation model composed of five feeders and one dedicated line using PSCADEMTDC showed that the proper delayed time of protective devices reflecting the fault condition and the power output of the wind fa& could improve the operational reliability, efficiency, and stability of wind farm.

Research on the protection coordination of permanent magnet synchronous generator based wind farms with low voltage ride through capability

“…Thus, the setting of wind farm collector network instantaneous protection should not only consider its short circuit current characteristics, but also require installing directional element if necessary [28,29]. An adaptive protection method based on short circuit current characteristics is presented in [30,31], which counters for different wind power output, short circuit current level and wind farm types. However, the presented researches have little consideration on LVRT control strategy for wind farm protection configuration and coordination.…”

A novel method for adaptive distance protection of transmission line connected to wind farms

“…Training function is ''scaled conjugate gradient back propagation''. 2 The diagram of 3rd neural network is shown in Fig. 9.…”

“…Obviously, the transmission system that connects such farms will be exposed to such a continuously changing environment. In most papers, topics related to protection of wind farms have discussed about over-current relay setting in distribution systems and adaptive schemes are proposed for distribution systems connected with wind generators [2,3]. The protection of transmission line connected to wind farms is discussed in [4].…”

Adaptive Setting and Simulation of Distance Protection Relay in a Long Transmission System Connected to an Offshore Wind Farm

“…They can successfully protect a wind turbine when an internal fault occurs. The proper delayed operation time of an over-current relay that is used in neighboring distribution feeders that are connected to a wind farm interconnected has been studied [2] by undertaking a case study. In that study, the simulation considered the various fault conditions and the power output of the wind farm demonstrated that the setting of the optimal operating time of the over-current relay could improve the operational reliability and stability of the wind farm.…”