Introduction:
In a power plant, two 50Hz generating units are operating in parallel. Each unit has specific ratings that determine their performance and capabilities. Let's explore these ratings and understand their significance in detail.

Ratings of the Generating Units:
The ratings of the two 50Hz generating units within the power plant are as follows:

1. Frequency: 50Hz
2. Operating Mode: Parallel Operation
3. Capacity: Not provided

Significance of Ratings:
The ratings of the generating units play a crucial role in ensuring efficient and reliable power generation. Here's a detailed explanation of each rating:

1. Frequency:
The frequency rating of 50Hz indicates that the generating units are designed to produce electrical power at a frequency of 50 cycles per second. This frequency is commonly used in many countries, including those in Europe and Asia. It ensures compatibility with the existing power grid and allows for seamless integration of the generated power.

2. Operating Mode: Parallel Operation
The operating mode of parallel operation means that both generating units are synchronized and connected to the power grid simultaneously. In this mode, the units share the load and work together to meet the power demand. Parallel operation offers several advantages, including increased reliability, flexibility, and the ability to handle higher loads. It also allows for maintenance of one unit while the other continues to generate power, minimizing downtime.

3. Capacity:
The capacity rating of the generating units determines the maximum power output they can deliver. Unfortunately, the provided information does not include the specific capacity values for the units. However, the capacity of each unit should be carefully determined based on factors such as the power demand, grid requirements, and the plant's overall capacity. It is crucial to ensure that the combined capacity of the units is sufficient to meet the power requirements of the connected load without overloading the system.

Conclusion:
The ratings of the two 50Hz generating units operating in parallel within the power plant have a significant impact on their performance and the overall efficiency of power generation. The frequency rating ensures compatibility with the power grid, while parallel operation allows for increased reliability and flexibility. The capacity rating, although not provided, is essential for determining the maximum power output of each unit. By considering these ratings and optimizing the operation of the units, the power plant can efficiently meet the power demand and ensure a stable electricity supply.