This proposed research explores the functionality of resonant fault current limiting and series compensators. Being a variable impedance from both amplitude and phase point of view enables a series or parallel type resonate circuit to be suitable for various applications from power quality to power system protection. Accordingly, this thesis can be divided into two distinctly different parts. The first deals with an abrupt impedance change used for fault current limiting purposes. The other offers a continuous and moderate change of impedance that can eliminate voltage sag/swell. As a result, the final device will be called a Resonance-Based Series Compensating Fault Current Limiter (resonant series compensated FCL). The unprecedented cost reduction of rooftop PV systems has motivated many homeowners to install rooftop PV systems. However, their intermittent generation can cause problems in the distribution network’s ability to accommodate a high penetration. This legitimate concern inspired this research to develop a controllable resonant device for both series compensation and fault current limiting. The resonant series compensated FCL proposed in this work can increase the hosting capacity, i.e., the accommodation capacity of PV units in each distribution area, and, at the same time, improve the reliability of a distribution system by preventing power interruptions during momentary or transient faults. An efficient resonant series compensated FCL must fulfill the requirements of both series compensator and fault current limiter (FCL), which are somewhat mutually exclusive. As such, this research study starts with the design of a resonant FCL (RFCLs), and then is modified to include series compensation operation during normal conditions.