Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control
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 charac...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2021-06-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202101111 |
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| _version_ | 1850051666540232704 |
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| author | Kai SHENG Xin ZOU Jing QIU Xiaoxing ZHU |
| author_facet | Kai SHENG Xin ZOU Jing QIU Xiaoxing ZHU |
| author_sort | Kai SHENG |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-9fafa85e28564007ace267aea8ed51fe |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2021-06-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-9fafa85e28564007ace267aea8ed51fe2025-08-20T02:53:03ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492021-06-0154611111810.11930/j.issn.1004-9649.202101111zgdl-54-6-shengkaiRefined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency ControlKai SHENG0Xin ZOU1Jing QIU2Xiaoxing ZHU3State Grid Hunan Electric Power Company Research Institute, Changsha 410007, ChinaState Grid Hunan Electric Power Co., Ltd., Changsha 410004, ChinaHunan Xiangdian Test & Research Institute Co., Ltd., Changsha 410006, ChinaHunan Provincial Key Laboratory of High Efficiency & Clean Thermal Power Technology, Changsha 410007, ChinaDue 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.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202101111thermal power unitpower responsevalve discharge characteristicthrottle pressuredynamic conversion factoraccurate modelprimary frequency control |
| spellingShingle | Kai SHENG Xin ZOU Jing QIU Xiaoxing ZHU Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control Zhongguo dianli thermal power unit power response valve discharge characteristic throttle pressure dynamic conversion factor accurate model primary frequency control |
| title | Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control |
| title_full | Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control |
| title_fullStr | Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control |
| title_full_unstemmed | Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control |
| title_short | Refined Modeling for Power Response Characteristic of Thermal Power Unit under Primary Frequency Control |
| title_sort | refined modeling for power response characteristic of thermal power unit under primary frequency control |
| topic | thermal power unit power response valve discharge characteristic throttle pressure dynamic conversion factor accurate model primary frequency control |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202101111 |
| work_keys_str_mv | AT kaisheng refinedmodelingforpowerresponsecharacteristicofthermalpowerunitunderprimaryfrequencycontrol AT xinzou refinedmodelingforpowerresponsecharacteristicofthermalpowerunitunderprimaryfrequencycontrol AT jingqiu refinedmodelingforpowerresponsecharacteristicofthermalpowerunitunderprimaryfrequencycontrol AT xiaoxingzhu refinedmodelingforpowerresponsecharacteristicofthermalpowerunitunderprimaryfrequencycontrol |