Bi‐level optimised emergency load/generator shedding strategy for AC/DC hybrid system following DC blocking

Zhu, Shaoxuan; Wang, Tong; Wang, Zengping

doi:10.1049/iet-gtd.2019.0593

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…China vigorously promotes the development of ultra-high voltage AC/DC, achieves large-scale and optimized resource allocation, and leverages the advantages of ultra-high voltage AC/DC with large capacity and long-distance transmission [1][2]. In 2009, the Changzhi Nanyang Jingmen UHV AC test demonstration project was officially put into operation, forming an interconnected synchronous power system consisting of 12 provincial (municipal) level power grids in North China and Central China.…”

Section: Introductionmentioning

confidence: 99%

Improving and warning the static stability limit of complex power grid tie-line based on WAMS

Fu,

Zhu,

Sun

et al. 2023

J. Phys.: Conf. Ser.

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In order to solve the technical problems of traditional power system classic formulas that are difficult to explain the static stability limit changes of power grid interconnection lines, as well as the difficulties in improving and warning the static stability limit power of interconnection lines, this paper provides a method for improving and warning the static stability limit of power grid interconnection lines. Firstly, based on the electrical quantities measured by the wide-area measurement system (WAMS) of the power grid, the equivalent reactance of the power grid interconnection lines, and the equivalent impedance from the high voltage side and medium voltage side of the three coil transformers on both sides of the interconnection line are determined. Secondly, under pre-set operation mode and constraint conditions, the configuration quantity and capacity of the dynamic reactive power sources on the medium voltage side of the three coil transformers on both sides of the interconnection line are determined. Finally, based on the determined configuration and pre-set operation mode of the dynamic reactive power sources on the medium voltage side of the three coil transformers on both sides of the interconnection line, the historical electrical quantities measured by WAMS. The static stability limit and static stability margin of the interconnection line are calculated, and warnings are provided.

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Section: Introductionmentioning

confidence: 99%

Improving and warning the static stability limit of complex power grid tie-line based on WAMS

Fu,

Zhu,

Sun

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Thus, the problem of large-scale power flow transfer may be solved by reducing the active power output of the sending-end AC system in the AC/DC transmission system with high-proportion wind power, for which two methods of its solution can be adopted: generator shedding or thermal power unit frequency modulation. The first method has the problem of over-shedding, which will increase the unnecessary startup and shut-down times of thermal power units and deteriorate the operation state of wind farms [18], resulting in the reduction in relevant economic benefits. The second method has a very limited power regulation effect on the sending-end AC system with highproportion wind power and cannot effectively deal with the system power flow fluctuation in time.…”

Section: Introductionmentioning

confidence: 99%

An Active Power Coordination Control Strategy for AC/DC Transmission Systems to Mitigate Subsequent Commutation Failures in HVDC Systems

et al. 2021

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Subsequent commutation failures (CFs) in HVDC systems will cause large-scale power flow transfer in AC/DC transmission systems and lead to overload risk in HVAC systems. In order to cope with these effects, a power coordination control strategy for the AC/DC transmission system with high-proportion wind power is proposed. Firstly, a model of the AC/DC transmission system considering the large-scale wind farms access is established by analyzing the power transmission characteristics of the AC/DC transmission system with high-proportion wind power, and the power transmission characteristics are analyzed after subsequent CFs. Secondly, the HVDC subsequent CFs can be mitigated by adjusting DC power transmission, while the active power output of the sending-end AC system is reduced by active control of wind turbine generators (WTGs) to reduce the overload risk of the HVAC system. Finally, the proposed power coordination control strategy is simulated and verified based on the established simulation model and actual power grid, and the results show that this strategy can effectively mitigate HVDC’s subsequent CFs and reduce the overload risk in HVAC systems.

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Cascading fault prevention and control strategy based on economic dispatch of AC/DC systems

Deng,

Xie,

Huang

et al. 2024

Electr Eng

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Bi‐level optimised emergency load/generator shedding strategy for AC/DC hybrid system following DC blocking

Cited by 7 publications

References 24 publications

Improving and warning the static stability limit of complex power grid tie-line based on WAMS

Improving and warning the static stability limit of complex power grid tie-line based on WAMS

An Active Power Coordination Control Strategy for AC/DC Transmission Systems to Mitigate Subsequent Commutation Failures in HVDC Systems

Cascading fault prevention and control strategy based on economic dispatch of AC/DC systems

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