Generator Paralleling Cabinet

What is a Paralleling Cabinet?

When two or more generator sets are combined to supply power to the load, or when one or more Cummins diesel generator sets are combined to supply power to the power grid, a generator paralleling/grid - connecting cabinet needs to be installed so that the system can meet the requirements of combined power supply and enable the generators to operate normally.

Requirements for Multiple Generators to Run in Parallel

Generally, the following basic conditions must be met for parallel operation:

1.Equal voltage;

2.Equal frequency;

3.Consistent phase sequence;

4.Equal phase;

5.Equal output characteristics. Only when the above five basic conditions are met can the generators be paralleled.

Advantages of Generator Paralleling

1.Improve the reliability and continuity of the power supply system. Since multiple generator sets are paralleled to form a power grid, the power supply voltage and frequency are stable and can withstand the impact of large load changes.

2.Facilitate maintenance. Multiple generator sets operating in parallel can be centrally dispatched to distribute active and reactive loads, making maintenance and repair convenient and timely.

3.Be more economical. According to the size of the load, an appropriate number of generator sets with suitable power can be put into operation, reducing the waste of fuel and engine oil caused by large - power generator sets operating under small loads.

4.Provide more flexibility for future expansion. Only install the power generation and parallel - connection equipment with the currently required power. When the company needs to expand the power grid capacity in the future, additional generator sets can be added, and the parallel connection of the expanded generator sets can be easily realized, making the initial investment more cost - effective.

Classification of Paralleling Cabinets (According to Voltage and Regulation Modes)

1.Low - voltage fixed type

2.Low - voltage withdrawable type

Classification of Paralleling Schemes (Regulation Modes)

1.Manual paralleling: Use lights or a synchronizing meter for indication. This method is generally used for old - style diesel generator sets with mechanical speed regulation.

2.Semi - automatic paralleling: Automatic paralleling and manual disconnection. It is generally used as the main or backup power supply for industrial applications.

3.Automatic paralleling: When the mains power fails, two or more generator sets are automatically started and paralleled to supply power to the load. When the mains power is restored, the generator sets are automatically disconnected and shut down. It is generally used as the backup power supply for buildings.

4.Peak - shaving paralleling (fully automatic paralleling): Based on the automatic paralleling cabinet, according to the change in load size, the paralleling cabinet can automatically start and parallel multiple generator sets, as well as automatically disconnect and shut down the generator sets.

5.Remote - control, remote - signaling, and remote - metering paralleling system: A paralleling system that uses a dedicated single - chip microcomputer system to complete the communication connection between the paralleling cabinet, generator sets, and a PC.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to [email protected] we will pay highly attention on your question.