火电机组一次调频功率响应特性精细化建模

doi:10.11930/j.issn.1004-9649.202101111

中国电力 ›› 2021, Vol. 54 ›› Issue (6): 111-118,152.DOI: 10.11930/j.issn.1004-9649.202101111

火电机组一次调频功率响应特性精细化建模

盛锴¹, 邹鑫², 邱靖⁴, 朱晓星³

1. 国网湖南省电力有限公司电力科学研究院，湖南长沙 410007;
2. 国网湖南省电力有限公司，湖南长沙 410004;
3. 高效清洁火力发电技术湖南省重点实验室，湖南长沙 410007;
4. 湖南省湘电试验研究院有限公司，湖南长沙 410006

收稿日期:2021-01-22 修回日期:2021-03-22 发布日期:2021-06-05
作者简介:盛锴(1983-),男,高级工程师,从事热工过程控制与网源协调优化研究,E-mail:shengkai0815@163.com
基金资助:
湖南省科技创新平台与人才计划资助项目(2016TP1027)；国网湖南省电力有限公司科技项目(5216A520000D)

Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control

SHENG Kai¹, ZOU Xin², QIU Jing⁴, ZHU Xiaoxing³

1. State Grid Hunan Electric Power Company Research Institute, Changsha 410007, China;
2. State Grid Hunan Electric Power Co., Ltd., Changsha 410004, China;
3. Hunan Provincial Key Laboratory of High Efficiency & Clean Thermal Power Technology, Changsha 410007, China;
4. Hunan Xiangdian Test & Research Institute Co., Ltd., Changsha 410006, China

Received:2021-01-22 Revised:2021-03-22 Published:2021-06-05
Supported by:
This work is supported by Hunan Science and Technology Innovation Platform and Talent Program (No.2016TP1027) and the Science and Technology Project of State Grid Hunan Electric Power Co., Ltd. (No.5216A520000D)

摘要/Abstract

摘要： 由于火电机组的功率响应具有较强的非线性特性，常规线性模型难以精确反映机组实际的一次调频响应特性。通过分析汽轮机阀门流量特性、主汽压力等关键因素对机组一次调频功率响应特性影响，引入阀门流量特性和主汽压力耦合函数、主汽压力模型和调节级压力-负荷动态转换系数，在典型汽轮机模型基础上构建火电机组一次调频功率响应特性精细化模型。结合某660 MW超临界机组的一次调频试验对所建立模型的性能进行验证。结果表明，与常规模型相比，新模型能够更好地反映实际机组的一次调频功率响应特性。

关键词: 火电机组, 功率响应, 阀门流量特性, 主汽压力, 动态转换系数, 精细化模型, 一次调频

Abstract: Due to the strong-nonlinearity characteristics of the power response of thermal power units, it is difficult to represent the practical power characteristics precisely in terms of the typical linear model. In this paper, through the analysis of the impacts of key factors such as the discharge characteristics of steam turbine valves and throttle pressure on the power response characteristics under primary frequency control, the steam turbine’s valve discharge characteristic and throttle pressure coupling function are introduced as well as the throttle pressure model and the dynamic conversion factor between first stage pressure and load. Then the refined model of power response under primary frequency control is established based on the typical steam turbine model. Finally, the performance of the established model is validated in combination with the primary frequency control test on an actual 660 MW supercritical unit. The results indicate that compared with the typical model, the proposed model demonstrates higher accuracy regarding the power characteristics under primary frequency control.

Key words: thermal power unit, power response, valve discharge characteristic, throttle pressure, dynamic conversion factor, accurate model, primary frequency control

盛锴, 邹鑫, 邱靖, 朱晓星. 火电机组一次调频功率响应特性精细化建模[J]. 中国电力, 2021, 54(6): 111-118,152.

SHENG Kai, ZOU Xin, QIU Jing, ZHU Xiaoxing. Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control[J]. Electric Power, 2021, 54(6): 111-118,152.

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火电机组一次调频功率响应特性精细化建模

Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control

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火电机组一次调频功率响应特性精细化建模

Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control

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