Interaction of Renewable Energy Source and Power Supply Network in Transient State

The paper describes of renewable energy system (RES) operability during transient states between power supply network and renewable source of energy. The basic connection between them is inductive coupling, whereby inductor separates output voltage of the RES inverter and harmonic supply voltage of the network. RES inverter can be operated in both sinusoidal-and rectangular regimes which are important of the point of view of efficiency and effectiveness of the operation. The main purpose of the paper is investigation of the critical operation state of the RES system as starting-up, overloading, short-circuit, disconnection, change of load, etc. Real-time simulation using hardware-in-loop control has been provided due to achieving of real-like experimental results.