Low voltage ride through capability of gas engine driven units

Recent developments in European grid code regulations demand the inclusion of decentralized generation (DG) into their requirements. Gas-engine-driven generators, as a part of Europe´s DG, need to comply with these requirements; and therefore procedures to receive admission are formed. Simulation stands for the most economical way to achieve this, however the simulation models need to be validated beforehand with the help of actual low-voltage-ride-through tests. This paper highlights the crucial steps of the validation procedure and questions the common practice of stability analysis and its applicability on gas-engine-driven units. Furthermore, events and operating conditions that may be critical and have not been considered so far for stability investigation are highlighted.