Diesel Generator Sets Fully Automatic Parallel Cabinet Project Part 1

What is the fully automatic parallel cabinet project for diesel generators? The principle of fully automatic parallel operation is that after several generators are connected, they are equivalent to a high-power generator supplying power to the load. The number of generators can be determined according to the size of the load (the unit consumes the lowest fuel at 75% of the rated load), thus achieving the goal of saving diesel and reducing the cost of diesel generators. Realize uninterrupted power supply to ensure normal production of the factory. When the unit is converted for use, the backup unit can be integrated into the operating system, and then all the load can be transferred to the already running backup unit before stopping the original operating unit. There is no need to cut off power halfway. Multiple units operate in parallel. When the load suddenly increases, the current surge is evenly distributed among the multiple units, reducing the force on each unit and stabilizing the voltage and frequency, which can extend the working life of the units.

The parallel operation of diesel generators generally requires the following basic conditions to be met:

1. Equal voltage;

2. Equal frequency;

3. Consistent phase sequence;

4. Equal phase;

5. Equal output characteristics;

Diesel generator cabinet classification: 1. Low voltage fixed type 2. Low voltage extraction type 3. High voltage fixed type 4. High voltage extraction type

Screen design: Adopting a combination type distribution cabinet with sealing plates on all sides, with a protection level of IP40. The four frames of the cabinet are perforated beams and columns, which can be freely and conveniently installed with various brackets. The upper part is a closed control room with ventilation louvers on both sides and a left hinged door for easy maintenance and operation by operators. The entire cabinet is made of 2mm thick electrolytic steel plate, which undergoes forming, acid washing, drying, spraying, and drying processes to ensure that it is not easy to peel off paint, corrode, or rust. The base is supported by U-shaped channel steel, allowing the entire cabinet to stand securely on the cable trench.

Busbar (busbar): All busbar connection surfaces are tinned to ensure reliable contact, and are marked in four colors: yellow, green, red, and black to indicate phase sequence and have a bright luster.

Self start and stop:

When the mains power fails, the generator set selected as the priority to start will be started first and automatically synchronously closed to deliver power to the ATS cabinet (provided by Party A), and then the ATS cabinet will deliver power to the load cabinet.

When the total output load exceeds 70% of the total rated power of the parallel generator set, the parallel cabinet will automatically output a start signal, and the next generator set will start and automatically synchronously close to transmit power to the grid.

When the total output load is less than 25% of the total rated power of the parallel connected generator sets, the parallel cabinet will issue a signal for opening and stopping. The unit will automatically trip one by one and delay shutdown until the unit with priority start is stopped.

When the mains power supply is normal, the ATS cabinet will automatically switch back to mains power supply, and the parallel cabinets will be opened one by one and shut down with a delay.

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