The advantages of the parallel machine and the cabinet
The full automatic generator unit is equipped with synchronous control, load distribution module and automatic switch switch. The whole set of cabinet has the characteristics of advanced performance, convenient maintenance and so on. In order to ensure the reliability of the power grid, it is necessary to have parallel cabinets for the case that multiple generators supply power to the load at the same time.
And the cabinet has the following advantages: 1. To improve the reliability and continuity of the power supply system, because the multi unit is parallel to a power grid, the voltage and frequency of the power supply are stable, which can withstand the impact of large load changes. 2. Maintenance and maintenance are more convenient for multiple units to be used in parallel. It can be centralized dispatch, active load and reactive load can be distributed, so that maintenance and maintenance are convenient and timely. 3, more economic can be based on the size of the network load, input the appropriate number of small power units to reduce the waste of oil and oil caused by the small load operation of the large power unit. 4, the future expansion is more flexible and only needs to install power generation and parallel equipment needed now. When the company needs to expand the capacity of the power grid, it will increase the diesel generating set, and can easily realize the expansion of the unit and make the initial investment more economical.
Requirements and conditions for parallel operation
1, electronic speed governing generator set; same phase sequence; equal voltage; same frequency and same phase. Automatic and computer screen: the most practical automation system. It has all the functions of a manual parallel screen. When the switch selection bar is placed in the "automatic" position, the automatic synchronizer can automatically adjust the frequency and phase of the unit to be connected to the unit, and output the closing signal in synchronization. Built-in programmable controller can automatically control load balance, load demand and unit operation dispatch to ensure the reliable operation of power grid. When the power failure occurs, it can automatically start the generator set, connect it in parallel, and monitor all kinds of faults in the parallel system.
Main features of multiple generator sets
1, manual / full automatic and machine choice.
2, synchronous and accurate, no impact, and the machine time is short (not more than 3 seconds).
3, according to the needs of the load and the automatic parallel operation or disassembly of the unit, it will make the operation more economical.
4, when multiple units work together, the difference of load distribution is less than 5%, which ensures the reliability of the unit operation.
5. Cooperating with the unit self-starting control module, it can realize the automatic start-up and input when the power failure occurs, automatic parallel, and automatic disassembly and shutdown after the power recovery. 6. It has the functions of reverse power, overcurrent, short circuit, mechanical fault, and fault indication and protection of floating charger.
7, can be used with the ATS cabinet, after the city electricity, the unit automatically delayed excision, the load turned to the city electricity end; when the city electricity failure, the unit started from the load to the generator end. In this transformation, city electricity is always a priority.
And configuration of cabinet
1, the cabinet is generally the size of the international electrical standard cabinet, and it can also be processed according to the size required by users.
2, the number of the cabinet body of the feeder: 1 units / units. 3, all the indicator on the cabinet, all control relays, switching switches, potentiometers are imported or made in China, and the protective grade of the cabinet conforms to the IP22 standard. 4, parallel machine control module: electronic speed control module, synchronous module, load distribution module, interface card and so on. 5. Parameter display: current, voltage, frequency, power and power factor meter.
6, breaker: according to user requirements, configure the appropriate specification of quick closing universal air circuit breaker.
summary
In summary, the advantages of several diesel generating sets are as follows: the control system is economical, simple, flexible, convenient, safe and reliable, and can fully meet the requirements and needs of the user's dynamic load.
