In modern power generation systems, most diesel generators are designed to operate in parallel, which greatly enhances the reliability and efficiency of power supply. Parallel connection refers to the connection of multiple generators together to jointly bear the load and share the work. Through parallel operation, not only can power generation be increased, but also automatic load distribution can be achieved, thereby better coping with peak demand. This parallel connection method is not only practical but also economical, and can maximize the efficiency of diesel generators.

        The online operation principle of diesel generator sets

        Connecting multiple operating generator sets together to form a high-capacity power source to supply power to the load or to the power grid in coordination is a method to increase power supply capacity and save costs. A grid-connected system can ensure that when there is a power failure in the municipal power supply and a generator set is needed, two or more generator sets will be automatically connected to the grid to provide power to the load. When the load demand is lower than 60% of the rated capacity of a single generator set (adjustable), the system will send a “reduce generator” signal to unload and shut down the standby generator set. When the load exceeds 80% of the rated capacity of a single generator set, the system will automatically issue a “add generator” instruction, and the standby generator set will start automatically. After adjusting the phase and frequency, the standby generator set will be automatically connected to the power grid system to achieve automatic balanced distribution of the load. To connect the generator set to the power grid, it is necessary to ensure that the voltage, frequency and phase of the two generator sets are completely consistent instantaneously, that is to say, they need to maintain “three synchronizations”.

        Parallel operation of diesel generator sets

        Enhance the reliability and continuity of the power system. By connecting multiple generators in parallel to form a network, the stability of power supply voltage and frequency is ensured to withstand the impact of large load fluctuations.

        2. Maintenance and upkeep are more convenient. Multiple units can be connected in parallel, facilitating unified dispatching and load distribution, and facilitating timely maintenance and upkeep.

        3. To enhance economic efficiency, the number of small-power units can be flexibly selected based on the size of the online load, so as to reduce the waste of fuel and engine oil by large-power units when operating under small loads.

        4. Future development will be more flexible. Only the power generation equipment and parallel connection equipment that meet the current power demand need to be installed. If the company needs to increase the grid capacity, it can add more power generation units and conveniently realize the parallel connection of the units, thus making the initial investment more economical.

        Overall, the parallel operation of diesel generator sets is an efficient and reliable power supply solution. Through the coordinated operation of multiple generators, not only has the power supply capacity been enhanced, but also the stability of the power system has been guaranteed, ensuring that the electricity demands of users are met. This flexible and economical operation mode plays a significant role in the modern power generation field, providing reliable support for the power demands of all sectors of society.