Multi-unit grid connection project

Release time:

2020-06-20 11:30

Source:

The main function of the cabinet is to automatically merge the unit with a full electronic protection system for short circuit, overload, overvoltage, reverse power and other faults, so that the generator can run safely and reliably. The generator set put into parallel connection can automatically carry out the proportional distribution of active power load, and the distribution difference is not more than 10%. Automatic frequency tracking synchronous parallel.

I. Main Functions of the Mold Cabinet

Short circuit, overload, over-voltage, reverse power and other faults of the unit are provided with a full electronic protection system to ensure safe and reliable operation of the generator.
The generator set put into parallel connection can automatically carry out the proportional distribution of active power load, and the distribution difference is not more than 10%.
Automatic frequency tracking synchronous parallel.

II. The advantages and disadvantages of merging cabinets

1. Main advantages
1) After multiple units are connected in parallel, an appropriate number of units can be put into operation according to the load on the network to ensure that the units run in the best condition, which can save the loss of fuel and oil (the fuel consumption rate of the units is the lowest under the working condition of 75% of the rated load), thus achieving the purpose of saving diesel oil and reducing the cost of power generation, bringing obvious economic benefits to the enterprise.
2) After the units are connected in parallel, the power supply quality is improved, and the voltage and frequency of the electrical equipment are stable, which can withstand the impact of heavy load on the generator and reduce the unit failure.
3) After the units are connected in parallel, it becomes an overall power grid. After centralized control is adopted, the power dispatch of the whole plant is flexible and convenient.
4) The safety advantage of automatic parallel connection and automatic distribution of active power without manual operation.
2. Disadvantages
1) A set of high-tech parallel connection cabinet usually has a very low failure rate. Once a failure occurs, a professional maintenance company with certain technical personnel is required to repair it.
2) The one-time investment is larger.