什么机组调峰能力强

中文段落：

在现代电力系统中，机组的调峰能力成为了评估其性能的重要指标之一。那么，什么机组的调峰能力强呢？

首先，燃气轮机机组在调峰方面表现出色。由于燃气轮机启动速度快、调节灵活，能够在短时间内快速响应负荷变化，因此非常适合作为调峰机组。在电力需求高峰时，燃气轮机可以迅速增加出力，满足电力系统的需求；而在电力需求低谷时，则可以降低出力或停机，避免能源浪费。

其次，抽水蓄能机组也是调峰能力强的机组之一。抽水蓄能机组利用上下游水库之间的水位差，通过抽水和发电两个过程来储存和释放电能。在电力需求高峰时，可以通过发电过程释放储存的电能，增加电力系统的出力；而在电力需求低谷时，则可以通过抽水过程将多余的电能转化为势能储存起来，以备不时之需。

此外，联合循环机组也是调峰能力强的机组之一。联合循环机组结合了燃气轮机和蒸汽轮机的优势，通过燃气轮机驱动蒸汽轮机发电，实现了能量的梯级利用。这种机组既能够快速响应负荷变化，又具有较高的发电效率，因此在调峰方面表现出色。

综上所述，燃气轮机机组、抽水蓄能机组和联合循环机组都是调峰能力强的机组。这些机组在电力系统中发挥着重要作用，能够确保电力系统的稳定运行和电力供应的可靠性。

英文段落：

In modern power systems, the peak shaving capacity of power units has become one of the key indicators to assess their performance. So, which units exhibit strong peak shaving capabilities?

Firstly, gas turbine units excel in peak shaving. Due to their fast startup speed and flexible adjustment, gas turbines can quickly respond to load changes within a short period, making them ideal for peak shaving applications. During high demand periods, gas turbines can rapidly increase their output to meet the power system's requirements, while during low demand periods, they can reduce their output or shut down to avoid energy waste.

Secondly, pumped-storage units are also known for their strong peak shaving capabilities. These units utilize the water level difference between upstream and downstream reservoirs to store and release energy through pumping and generation processes. During peak demand, they can release stored energy through the generation process, increasing the power system's output. During low demand, they can convert excess energy into potential energy through pumping, ready for future use.

Moreover, combined-cycle units also demonstrate strong peak shaving abilities. Combined-cycle units combine the advantages of gas turbines and steam turbines, utilizing gas turbines to drive steam turbines for power generation, achieving energy cascade utilization. These units can not only respond quickly to load changes but also exhibit high generation efficiency, making them stand out in peak shaving.

In conclusion, gas turbine units, pumped-storage units, and combined-cycle units all possess strong peak shaving capabilities. These units play a crucial role in ensuring the stable operation of power systems and the reliability of power supply.