Application and analysis of echelon cycle in ultra supercritical 1000 MW unit

YANG Hong; YU Yan; FAN Shiwang; YI Xiaolan; JIN Yibo; HE Haiyu

doi:10.19666/j.rlfd.201907169

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Application and analysis of echelon cycle in ultra supercritical 1000 MW unit

更新时间：2025-09-28

- Application and analysis of echelon cycle in ultra supercritical 1000 MW unit
- Thermal Power Generation Vol. 48, Issue 12, Pages: 129-133(2019)
- 作者机构：
  
  1. 上海电气电站设备有限公司上海汽轮机厂
  2. 上海汽轮机厂有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201907169
  CLC： TK262
- Published Online：31 December 2019，
  
  Published：2019
- 稿件说明：
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YANG Hong, YU Yan, FAN Shiwang, et al. Application and analysis of echelon cycle in ultra supercritical 1000 MW unit[J]. Thermal power generation, 2019, 48(12): 129-133.
DOI：

YANG Hong, YU Yan, FAN Shiwang, et al. Application and analysis of echelon cycle in ultra supercritical 1000 MW unit[J]. Thermal power generation, 2019, 48(12): 129-133. DOI： 10.19666/j.rlfd.201907169.

摘要

以广东甲湖湾超超临界1 000 MW一次再热机组为例

对梯次循环(EC)的实际工程应用进行了研究。在相同边界条件下

对常规循环和EC分别进行了热力计算

并对EC的运行灵活性进行了分析。结果表明

采用EC可降低电厂设备投资

提高机组经济性

在电厂运行方面无控制难点。EC适用于再热蒸汽温度600℃及以上的一次再热、二次再热项目

其成功应用为实现700℃超超临界发电技术打下工程应用基础。

Abstract

By taking the ultra-supercritical 1000 MW single reheat unit at Guangdong Jiahuwan bay as an example

the actual engineering application of echelon cycle(EC) was studied. Under the same boundary conditions

thermal calculation of the conventional cycle and EC were carried out

and operation flexibility of the EC was analyzed. The results show that

using EC can reduce the equipment investment of power plants

improve the unit economy

and have no control difficulties in plant operation. The EC is applicable to power units with single-reheat/double-reheat with reheat temperature of 600 ℃ and above

and its successful application lays the foundation of engineering application for 700 ℃ ultra supercritical power generation technology.

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