A Detection Method for Virtual Threshold of Busbar Voltage in Distribution Network with Distributed Wind Turbines under Reactive-Power Disturbance
Distributed wind turbines are connected to nearby distribution networks through collecting circuits and variations in their output power directly impact the network voltage, subsequently affecting the operation of loads connected to the same distribution networks. To enable real-time detection of bu...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Control and Information Technology
2025-02-01
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| Series: | Kongzhi Yu Xinxi Jishu |
| Subjects: | |
| Online Access: | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2025.01.018 |
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| Summary: | Distributed wind turbines are connected to nearby distribution networks through collecting circuits and variations in their output power directly impact the network voltage, subsequently affecting the operation of loads connected to the same distribution networks. To enable real-time detection of busbar voltage in distribution networks with distributed wind turbines, offering a reference for the power control of these wind turbines, this paper presents a method of detecting virtual thresholds for voltage in these distribution networks based on periodic reactive-power disturbances. Considering the periodic reactive power outputs of distributed wind turbines, the mode of virtual impedance between the busbar and the wind turbines is identified, based on the generator terminal voltage and reactive current, and the busbar voltage is indirectly detected. Under the operating mode with varying wind turbine terminal voltage and reactive power, this detected voltage and the wind turbine terminal voltage are considered as the virtual busbar voltage, and the operating threshold of this virtual busbar voltage serves as the virtual threshold for the actual busbar voltage. The simulation analysis results revealed that, under the four combined operational modes of wind turbine terminal voltage and reactive power, the virtual busbar voltage reached the operating threshold of the busbar voltage earlier than the actual busbar voltage, indicating the effectiveness of the proposed method in facilitating advance control and protection against actual busbar voltage exceeding its limit. Therefore, using the operating threshold of virtual busbar voltage as the operating threshold of actual busbar voltage is demonstrated effective. |
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| ISSN: | 2096-5427 |