المجلة الدولية للعلوم والتقنية

In this research paper, presented proposal was to improve the performance of turbulent networks, an example of which is the network of marine vessels. The solution is based on adding a multi-level voltage inverter to work in parallel with the network. The electrical grid in ships is often fed by synchronous generators propelled by internal combustion diesel engines. The main reason that causes disturbances in the network is that the electrical capacity of the major loads in the ship is close to the capacity of diesel engines, and this phenomenon does not exist in normal networks, as the capacity of individual loads is almost non-existent in relation to the capacity of gas turbines and thus separating and connecting these loads does not cause any problems on the work of the turbine itself, in particular, frequency changes as a result of switching individual loads. After the previous comparison study, it was clear that the voltage inverter type OVT is the most suitable for carrying out simulation experiments [1]. The Matlab program was used to simulate the simulated case that was used in the study, which is a ship network fed by a synchronous generator driven by a diesel internal combustion engine, the generator capacity is 250 kVA with a load of 100 kVA, another load of the same capacity is connected to observe the change that arises from adding This load, where the change in the root mean squared value (RMS) of the voltage, and the change in the frequency value were observed. This experiment was repeated twice; Once without the proposed solution and the second time with the proposed solution, where it was noticed that there is a significant improvement in the stability of the effective value of the voltage on the network after adding the proposed solution, where the effective value of the voltage decreased from 9% (before using the voltage inverter) to 2% (after using the voltage inverter). Key words: OVT voltage inverter, turbulent networks, marine ship networks, synchronous generators.