How to run multiple generator sets in parallel?

How to parallelize What are the requirements and conditions for parallel operation? What are the advantages and advantages of unit paralleling? Haixing Power Technology analyzes parallel technology for customers! Usually, the generator sets are the generator set ? combined organically to achieve theoretical increase in power generation through a parallel system The power generation of two units must meet three conditions when operating in parallel: the voltage is the same, the frequency is the same, and the initial phase is the same. Theoretically, as long as the unit of different models is an electronic speed control system, it can be used to run and generate electricity in parallel..

1. Requirements and conditions for parallel operation
of electronic speed regulation generator sets; the phase sequence is the same; the voltage is equal; the frequency is the same; the phase is the same. Automatic parallel screen: a practical automation system. With all the functions of manual parallel screen. When the switch selection switch is placed in the 'auto' position, the automatic synchronizer can automatically adjust the frequency and phase of the unit to be merged, and output the closing signal during synchronization to achieve automatic paralleling. Built-in programmable controller can automatically control load balancing, load requirements and unit operation scheduling to ensure reliable operation of the power grid. When the mains power failure is caused, the generator set can be automatically started, connected in parallel automatically, and various faults in the parallel system can be monitored.
2. Integrated cabinet configuration
1. The cabinet body is generally of the international electrical standard cabinet size, and can also be processed according to the size required by the user.
2. Number of incoming cabinets: 1 unit/unit. 3. All indicator instruments on the cabinet, all control relays, conversion switches, and potentiometers are imported or domestically produced products, and the protection level of the cabinet complies with IP22 standards.
4. Parallel control module: electronic speed regulation module, synchronization module, load distribution module, interface card, etc.
5. Parameter display: Current, voltage, frequency, power, power factor table
6. Circuit breaker: Configure the fast closing air circuit breaker of appropriate specifications according to user requirements.
3. Advantages of paralleling machines and parallel cabinets.
Haixing Power Company believes that the paralleling machine (parallel) of fully automatic generator sets are equipped with synchronous control, load distribution modules and automatic closing switches. The entire set of parallel cabinet devices have the characteristics of advanced performance and easy to use and maintain. In case where multiple generator sets supply power to the load at the same time, in order to ensure the reliability of the power grid, economics must be equipped with a merging cabinet.
The unitary cabinet has the following advantages:
1. Improve the reliability and continuity of the power supply system. Because multiple units are connected in parallel to a power grid, the voltage and frequency of the power supply are stable and can withstand the impact of large load changes.
2. Maintenance and maintenance are more convenient for multiple units to be used in parallel, and can be centrally dispatched and allocated active and reactive loads, which can make maintenance and maintenance convenient and timely.
3. More economical. You can invest an appropriate number of small-power units according to the size of the online load to reduce the waste of fuel and oil caused by the operation of small loads of high-power units.
4. In the future, the expansion will be more flexible. Only the power generation and parallel equipment of the current required power must be installed. When the company needs to expand the power grid capacity in the future, it will add a diesel generator set, and it can easily realize the parallelization of the expansion units, making initial investment more economical.
4. The main features of paralleling multiple generator sets:
1. Manual/full automatic paralleling method selection.
2. Synchronous paralleling is accurate, without impact, and the paralleling time is short (no more than 3 seconds).
3. Automatically reorganize or de-arrange the units to be reorganized according to load needs to make the operation more economical.
4. When multiple units work in parallel, the load distribution difference is less than 5%, ensuring the reliability of unit operation.
5. Cooperate with the unit's self-start control module, it can automatically start and put into operation when the mains power fails, and automatically un-unblock the mains power and shut down after the mains power is restored.
6. It has reverse power, overcurrent, short circuit, mechanical fault, fault indication and protection functions of mains floating charger.
7. It can be used in conjunction with the ATS cabinet. After the mains power comes, the unit will automatically cut off and the load will be transferred to the mains power terminal; when the mains power fails, the unit will start automatically and the load will be transferred to the generator terminal. In this conversion, mains electricity is always preferred.
5. Summary
: To sum up, our Haixing Power Company believes that the advantages of paralleling multiple diesel generator sets are: the control system is economical, simple, flexible, convenient, and reliable, and can meet the requirements and needs of users' dynamic loads.