Paralleling of electrical generators refers to the synchronization of two or more generators. This will increase the output voltage resulting in longer backup times.
Connecting two generators require certain considerations. In this blog post, you will learn about the benefits of connecting your generator in parallel and also some tips for paralleling generators.
Paralleling Generators: What are the Benefits
The most obvious benefit of connecting your generators in parallel is that it will result in increased backup time. Connecting generators in parallel will increase the flexibility and reliability of load management.
Paralleling generators will also reduce the power breakdown due to a single point of failure. It will reduce the risk of losing power in the event one of the generators does not start.
Multiple generators are particularly useful for health care firms. It will ensure a constant supply of power for life-critical medical equipment.
Tips for Connecting Generators in Parallel
Connecting generators in parallel is not just about connecting two generators. Generator paralleling requires connecting two generators that are of the same type and size. It involves connecting two generators often of the same brand.
Match the Load Requirements
You need to match the load requirements when connecting two generators. The generators must be of the same size and type. This is important since the generators need to be in sync when operating. A difference in sizes and type of generator will provide a strain on the generator.
Paralleling generators without matching the load will result in ‘dead bus synchronization’. This will prevent the continuous supply of power in case one of them fail due to any mechanical or other faults.
Connection of Three Phase Generators
Heavy industries rely on multiple three-phase generators. The generators must all have the same phase and frequency. In addition, the generators that are to be connected in parallel must have the same voltage sine curve.
Three-phase generators can be connected using a synchroscope method. This involves locking the generators to the main system frequency without regard to the initial frequency of each generator. Each generator can share the load through its power capacity.
The synchroscope device measures the synchronization degree when closing the breaker. It matches the relative speed of the engines to ensure that they match when the generator is started and turned off.
Another method to synchronize three-phase generators is using the lamp method. It is a less expensive alternative to the synchroscope method for connecting three-phase generators in parallel to improve the reliability of backup power.
Install Smart Panel
Another option to connect two generators is to install a smart panel. The smart panel will prevent the need for matching the load. It will allow you to parallel almost any type and size of the generator.
Smart panels are available in configurations of 400 Amp to more than 4000 Amp. These panels can monitor the power supply and automatically balance the load. It allows adding additional generators to ensure a continuous supply of power.
Conclusion
Paralleling a generator is recommended for hospitals and other businesses that rely on mission-critical equipment. It will ensure the continuous supply of power in case one of the generators fails to start.
Balancing the load is important to connect the generators in parallel. The load capacity, voltage, and frequency should be in sync. You can also consider installing a smart panel for connecting different types of generators. But this will jack up the price of paralleling generators
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