1. 发电机的容量和类型：不同容量和类型的发电机需要不同类型的励磁系统。例如，小型发电机通常采用静态励磁系统，而大型发电机则通常采用动态励磁系统。
2. 负载变化情况：如果发电机的负载变化频繁，需要选择调节速度较快的励磁系统，以确保发电机能够快速适应负载变化。
3. 对调节精度的要求：如果对发电机的调节精度要求较高，需要选择调节精度较高的励磁系统。
4. 可靠性和稳定性：励磁系统是发电机的重要组成部分，需要选择可靠性和稳定性较高的励磁系统，以确保发电机能够长期稳定运行。
5. 成本和维护性：需要考虑励磁系统的成本和维护性，选择成本合理、维护方便的励磁系统。
6. 技术支持和服务：需要选择有良好技术支持和服务的励磁系统供应商，以确保在系统出现故障时能够得到及时的解决。

PPD115 ABB Static excitation system refers to the system that provides excitation current to a generator through a DC power supply. It usually consists of a DC power supply, an excitation regulator and an excitation winding.
The advantages of the PPD115 ABB static excitation system are simple structure, high reliability, easy maintenance, suitable for small generators and excitation system requirements are not high occasions. However, its adjustment speed is slow and cannot adapt to the operation of the generator under rapidly changing loads.
When choosing a static excitation system, ABB needs to consider factors such as the capacity of the generator, load changes, and requirements for regulating speed to ensure that the system can meet the operational needs of the generator. At the same time, it is also necessary to pay attention to the reliability and maintenance of the system to ensure that the system can run stably for a long time.
Choosing the right excitation system for the generator requires consideration of the following factors:
Capacity and type of generator: Different capacities and types of generators require different types of excitation systems. For example, small generators usually use static excitation systems, while large generators usually use dynamic excitation systems.
Load changes: If the load of the generator changes frequently, it is necessary to choose an exciting system with a faster adjustment speed to ensure that the generator can quickly adapt to load changes.
Requirements for adjustment accuracy: If the adjustment accuracy of the generator is required to be higher, it is necessary to choose an excitation system with higher adjustment accuracy.
Reliability and stability: the excitation system is an important part of the generator, and it is necessary to choose an excitation system with high reliability and stability to ensure that the generator can run stably for a long time.
Cost and maintenance: The cost and maintenance of the excitation system need to be considered, and the excitation system with reasonable cost and easy maintenance should be selected.
Technical support and service: It is necessary to choose an excitation system supplier with good technical support and service to ensure that the system can be resolved in a timely manner when a failure occurs.
In summary, the selection of the suitable excitation system for the generator needs to take into account the capacity and type of generator, load variations, requirements for adjustment accuracy, reliability and stability, cost and maintenance, and technical support and service factors to select the most suitable excitation system.