The Principle and Application of Diesel Generator Parallel

In modern society, the stability and reliability of power supply are crucial for all industries. Especially in some critical facilities such as hospitals and data centers, the continuity and stability of power supply are related to people’s lives and the normal operation of society. To meet these demands, the parallel operation technology of diesel generators has emerged. This article will discuss in detail the principle of diesel generator parallel operation technology and its applications in various fields.

I. Principle of Diesel Generator Parallel Operation Technology

1. Overview of Parallel Operation Technology

The parallel operation technology of diesel generators, simply put, is to connect two or more diesel generator sets through a specific control system to jointly output power and achieve power superposition and load balancing. This technology not only improves the redundancy and reliability of the power supply system but also can flexibly adjust the output power according to actual needs to ensure the continuity and stability of power supply.

2. Core Steps of Parallel Operation Technology

The parallel operation technology of diesel generators involves several core steps, including synchronization detection and adjustment, load distribution, frequency and voltage control, and parallel operation control.

• Synchronization Detection and Adjustment: In a parallel operation system, each diesel generator set needs to have the function of synchronization detection and adjustment. When the diesel generator set synchronizes with the power system, the current and voltage will change. Therefore, it is necessary to detect and adjust the current and voltage of the generator set to ensure that it remains synchronized with the power system.
• Load Distribution: In a diesel engine parallel operation system, each diesel generator set needs to perform reasonable load distribution according to the load situation of the power system. The goal of load distribution is to make the load of each generator set as balanced as possible and avoid overloading or underloading.
• Frequency and Voltage Control: In a diesel engine parallel operation system, frequency and voltage are two important control parameters. To maintain the stable operation of the power system, it is necessary to precisely control the frequency and voltage. When the load of the power system changes, the diesel generator set needs to adjust the output frequency and voltage according to the system’s requirements.
• Parallel Operation Control: The parallel operation control in a diesel engine parallel operation system is the key to the entire system. Through the parallel operation control system, the automatic start, synchronization, and shutdown of diesel generator sets can be realized. The parallel operation control system can also monitor the state of the power system. When a certain diesel generator fails, it can be switched to a standby diesel generator set in time to ensure the continuous power supply of the system.

3. Conditions for Realizing Parallel Operation Technology

To realize the parallel operation of diesel generators, the following conditions must be met:

• The effective value and waveform of the voltage must be the same. This is the basis for ensuring the smooth parallel operation of generator sets.
• The phases must be the same. The consistency of phases can avoid harmful inrush currents at the moment of closing the switch and protect the generator sets from damage.
• The frequencies must be the same. The consistency of frequencies can ensure the synchronization of the rotational speeds of generator sets and thus achieve stable power output.
• The phase sequences must be the same. The consistency of phase sequences can avoid serious problems such as short circuits and circulating currents.

II. Applications of Diesel Generator Parallel Operation Technology

1. Construction Sites

On construction sites, due to unstable power supply or inability to connect to the power grid, diesel generator sets are often used for power supply. By performing parallel operation, the reliability and capacity of power supply can be improved. The parallel operation of multiple diesel generator sets can ensure a stable power supply during peak power demand, guaranteeing the normal progress of construction.

2. Industrial Production

In industrial production, a large amount of power support is often required. The diesel engine parallel operation system can automatically adjust the output of generator sets according to load changes to ensure the continuous power supply for industrial production. Especially in some industrial fields where key production lines cannot be interrupted, such as petrochemical and metallurgical industries, the importance of the parallel operation system is particularly prominent. It can ensure the continuous operation of production when there are fluctuations or failures in power supply and avoid economic losses caused by power outages.

3. Rural Power Grids

In rural areas, the power grid construction is imperfect and the power supply quality is poor. The diesel engine parallel operation system can improve the power supply capacity and reliability of rural power grids through the parallel operation of multiple generator sets. This is of great significance for improving the power supply situation in rural areas and enhancing the living quality of farmers.

4. Backup Power Supply for Power Systems

The diesel engine parallel operation system can be used as a backup power supply for power systems. When the power system fails or there is a power outage, the diesel generator sets can start up and connect to the system in time to ensure the normal operation of important equipment. Especially in some critical facilities such as hospitals and data centers, the importance of backup power supply is self-evident. It can ensure the normal operation of key equipment when the power supply is interrupted and guarantee people’s lives and the normal operation of society.

5. Data Centers

As the “heart” of the information age, data centers have extremely high requirements for the continuity and stability of power supply. The diesel generator set parallel operation system has become an indispensable backup power supply. Through parallel operation, it can ensure that data centers can still obtain a stable power supply when there are fluctuations or failures in power supply, ensuring the security of data and the continuous operation of business.

6. Hospitals

In emergency situations, stable power is the key to saving lives. The parallel operation technology provides reliable power guarantee for key areas such as hospital operating rooms and ICUs. Through the parallel operation of multiple generator sets, it can ensure that hospitals can still obtain a stable power supply when there are fluctuations or failures in power supply, ensuring the normal operation of medical equipment and the safety of patients.

7. Commercial Real Estate and High-Rise Buildings

When encountering extreme weather or power grid failures, the parallel operation system can provide stable emergency power for large shopping malls, office buildings, etc., ensuring the safety of people and the operation of businesses. The parallel operation of multiple generator sets can ensure the normal operation of commercial facilities when the power supply is interrupted, reducing economic losses and social impacts.

III. Advantages of Diesel Generator Parallel Operation Technology

1. Improving Power Supply Reliability

When one of the generator sets fails, the other generator sets can quickly take over the load to ensure uninterrupted power supply. This is especially important for critical facilities such as hospitals and data centers. Through parallel operation, redundant backups can form to improve the reliability and continuity of the power supply system.

2. Enhancing Overall Efficiency

Through an intelligent control system, each generator set can automatically adjust the output power according to the actual load situation to achieve optimal energy utilization and reduce operating costs. Parallel operation can flexibly adjust the output power according to actual needs to avoid energy waste and unnecessary losses.

3. Easy to Expand and Maintain

The parallel operation system has a modular design, which is convenient for increasing or decreasing the number of generator sets according to future needs. At the same time, the maintenance of a single generator set does not affect the overall power supply, reducing the difficulty and cost of maintenance. This flexibility enables the parallel operation system to adapt to power supply scenarios of different scales and requirements.

4. Promoting the Development of Intelligence and Greenization

With the continuous development of technologies such as the Internet of Things and big data, the diesel generator set parallel operation system is moving towards a more intelligent and green direction. The intelligent control system can monitor the operation status of generator sets in real time, predict failures and issue early warnings to achieve preventive maintenance. At the same time, by optimizing combustion control and adopting low-emission technologies, the impact on the environment can reduce to achieve green power supply.

IV. The Contribution of SR POWER in the Field of Diesel Generator Parallel Operation Technology

SR POWER, as an enterprise focusing on power equipment and solutions, has committed to promoting the development and application of diesel generator parallel operation technology. We have a professional technical team and rich practical experience and can provide customers with a full range of services from scheme design, equipment selection, installation and commissioning to after-sales maintenance.
In the field of diesel generator parallel operation technology, SR POWER has the following advantages:

• Advanced Technical Strength: We continuously introduce and absorb advanced technical achievements at home and abroad and combine our own R & D strength to launch a series of efficient and reliable diesel generator parallel operation systems.
• Rich Practical Experience: We have accumulated rich practical experience in many fields such as construction sites, industrial production, rural power grids, data centers, and hospitals and can provide customized solutions for customers.
• High-Quality After-Sales Service: We pay attention to customer experience and service quality and have established a perfect after-sales service system to ensure that customers can obtain timely and professional technical support and maintenance services during use.

V. Conclusion

The parallel operation technology of diesel generators plays an irreplaceable role in every corner of modern society with its unique advantages. It is not only the “anchor” for us to deal with sudden power outages but also an important force in promoting social and economic development and ensuring people’s living quality. SR POWER will continue to committed to the R&D and application of diesel generator parallel operation technology to provide customers with more efficient and reliable power solutions and contribute to the sustainable development and progress of society.