Minimizing the impact of distributed generation on distribution protection system by solid state fault current limiter

Suppression of Fault Currents on DG Using Various Fault Current Limiters in Distribution Network

“…After that a signal is given to the fast mechanical switch in path A to open. The fast mechanical switch opens within 150 ms and produces an arc voltage drop of about 40 V. The voltage drop across the semiconductor switches is typically 10-15 V, which is lower than arc voltage; therefore the current starts to commutate from path A onto path B [10]. When the commutation is completely done, the GTO switch is turned off after 150 ms to transfer the current to path C. The fault current is limited by flowing through the impedance of path C. After that to isolate the semiconductor switches from the high transient recovery voltage the mechanical switch in path B is opened when the current reaches zero.…”

“…The type of DG in this paper is assumed to be synchronous generator. The injected fault current from these DGs, have three states: sub-transient, transient and steady state [10]. Asynchronous machine is considered as conventional power plant.…”

“…Figure 2 shows the control block diagram of this FCL. Figure 2 is a schematic diagram of solid state FCL control [10]. In steady state condition, the GTOs are gated continuously.…”

“…A novel idea exists to limit the fault currents produced by DG and prevent switchgears upgrade is FCLs application [6]. The implementation of FCLs in electric power systems is not restricted to suppress the amplitudes of the short circuits; they are also applied in variety of performances such as the power system transient stability enhancement, power quality improvement, reliability improvement, increasing transfer capacity of system equipments and inrush current limitation in transformers [7][8][9][10]. Different configurations of fault current limit are proposed to mitigate the impact of DG on distribution protection system [6].…”

Fault Locating, Prediction and Protection (FLPPS)

“…A.3.5.3.29 Minimizing the Impact of Distributed Generation on Distribution Protection System by Solid State Fault Current Limiter [176] Summary: In this paper, a DG with appropriate rating is connected to the different places of distribution network and recalculates the fault current in each section after modeling the distribution network in PSCAD/EMTDC. The impact of DG on distribution protection system is studied comprehensively.…”