Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics
Abstract To enable power supply in rural areas and to exploit clean energy, fully renewable power systems consisting of cascaded run‐of‐the‐river hydropower and volatile energies such as photovoltaic (pv) and wind are built around the world. In islanded operation, the primary and secondary frequency...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-06-01
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| Series: | IET Renewable Power Generation |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/rpg2.12146 |
| _version_ | 1797894215814873088 |
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| author | Yiwei Qiu Jin Lin Feng Liu Ningyi Dai Yonghua Song Gang Chen Lijie Ding |
| author_facet | Yiwei Qiu Jin Lin Feng Liu Ningyi Dai Yonghua Song Gang Chen Lijie Ding |
| author_sort | Yiwei Qiu |
| collection | DOAJ |
| description | Abstract To enable power supply in rural areas and to exploit clean energy, fully renewable power systems consisting of cascaded run‐of‐the‐river hydropower and volatile energies such as photovoltaic (pv) and wind are built around the world. In islanded operation, the primary and secondary frequency controls, that are hydro governors and automatic generation control (AGC), are responsible for the frequency stability. However, due to limited water storage capacity of run‐of‐the‐river hydropower and river dynamics constraints, without coordination between the cascaded plants, the traditional AGC cannot fully exploit the adjustability of hydropower. When imbalances between the volatile energy and load occur, load shedding can be inevitable. To address this issue, this paper proposes a coordinated tertiary control approach by jointly considering power system dynamics and the river dynamics that couples the cascaded hydropower plants. To unify the multi‐timescale dynamics of the power system and river dynamics to establish a controller that coordinates the cascaded plants, the relation between AGC parameters and turbine discharge is approximated by a polynomial surrogate model. The cascaded plants are coordinated by optimising AGC participation factors in a receding‐horizon manner. Simulation of a real‐life system shows the proposed method significantly reduces load loss under pv volatility. |
| first_indexed | 2024-04-10T07:06:30Z |
| format | Article |
| id | doaj.art-ba227c7386894486be475cd4c577d2c4 |
| institution | Directory Open Access Journal |
| issn | 1752-1416 1752-1424 |
| language | English |
| last_indexed | 2024-04-10T07:06:30Z |
| publishDate | 2021-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Renewable Power Generation |
| spelling | doaj.art-ba227c7386894486be475cd4c577d2c42023-02-27T08:26:29ZengWileyIET Renewable Power Generation1752-14161752-14242021-06-011581778179510.1049/rpg2.12146Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamicsYiwei Qiu0Jin Lin1Feng Liu2Ningyi Dai3Yonghua Song4Gang Chen5Lijie Ding6State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing ChinaState Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing ChinaState Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing ChinaState Key Laboratory of Internet of Things for Smart City University of Macau Macau ChinaState Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing ChinaState Grid Sichuan Electric Power Research Institute Chengdu ChinaState Grid Sichuan Electric Power Research Institute Chengdu ChinaAbstract To enable power supply in rural areas and to exploit clean energy, fully renewable power systems consisting of cascaded run‐of‐the‐river hydropower and volatile energies such as photovoltaic (pv) and wind are built around the world. In islanded operation, the primary and secondary frequency controls, that are hydro governors and automatic generation control (AGC), are responsible for the frequency stability. However, due to limited water storage capacity of run‐of‐the‐river hydropower and river dynamics constraints, without coordination between the cascaded plants, the traditional AGC cannot fully exploit the adjustability of hydropower. When imbalances between the volatile energy and load occur, load shedding can be inevitable. To address this issue, this paper proposes a coordinated tertiary control approach by jointly considering power system dynamics and the river dynamics that couples the cascaded hydropower plants. To unify the multi‐timescale dynamics of the power system and river dynamics to establish a controller that coordinates the cascaded plants, the relation between AGC parameters and turbine discharge is approximated by a polynomial surrogate model. The cascaded plants are coordinated by optimising AGC participation factors in a receding‐horizon manner. Simulation of a real‐life system shows the proposed method significantly reduces load loss under pv volatility.https://doi.org/10.1049/rpg2.12146Rivers, runoff, and streamflowHydroelectric power stations and plantsSolar power stations and photovoltaic power systemsFrequency controlControl of electric power systemsOptimisation techniques |
| spellingShingle | Yiwei Qiu Jin Lin Feng Liu Ningyi Dai Yonghua Song Gang Chen Lijie Ding Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics IET Renewable Power Generation Rivers, runoff, and streamflow Hydroelectric power stations and plants Solar power stations and photovoltaic power systems Frequency control Control of electric power systems Optimisation techniques |
| title | Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics |
| title_full | Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics |
| title_fullStr | Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics |
| title_full_unstemmed | Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics |
| title_short | Tertiary regulation of cascaded run‐of‐the‐river hydropower in the islanded renewable power system considering multi‐timescale dynamics |
| title_sort | tertiary regulation of cascaded run of the river hydropower in the islanded renewable power system considering multi timescale dynamics |
| topic | Rivers, runoff, and streamflow Hydroelectric power stations and plants Solar power stations and photovoltaic power systems Frequency control Control of electric power systems Optimisation techniques |
| url | https://doi.org/10.1049/rpg2.12146 |
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