How should the output cables of three 100KW 400V diesel generators be connected?
Thread Content
We have installed three 100KW diesel generators in the desert. How do we connect the output cables to the circuit breakers outside?
If it is to be connected in parallel, an automatic grid connection device is required. Otherwise, supply power separately.
In particular, is this device reliable?
A parallel connection device needs to be installed; many people use the Czech-made IG-CU nowadays, and it performs well
To ensure the reliability of power supply, the generators can be operated in parallel. However, when three generators are used in parallel, it is necessary to ensure that their output voltage, frequency, phase, and phase sequence are all identical in order for them to operate together; otherwise, serious accidents may occur. Today, there are protection devices for synchronous paralleling, and it is recommended to use microcomputer-based synchronous protection devices for such operations. It can also operate independently, with the load being distributed evenly among the three units. The low-voltage side is operated in three sections, and busbar circuit breakers are installed between these sections. If one of the units fails, the operating sections will automatically come online. However, it is important to be aware of the possibility of loop formation among the units due to the use of busbars, which could lead to damage to those units.
The problem is solved; now it’s just the detailed drawing stage left. Thank you all, and thanks to the Haichuan Forum and all the enthusiastic people.
Three generators are connected in parallel, in a manner similar to how generators in a power plant are connected to the grid. If the voltages and phases of the three generators differ, operating them in parallel will cause overcurrent and damage to the generators. So, concurrent equipment is necessary.