Coordinative frequency-constrained unit commitment model for HVDC interconnected AC systems

Jiang, Sufan; Wu, Chuanshen; Gao, Shan; Pan, Guangsheng; Wang, Sicheng; Liu, Yu; Zhao, Xiaonan

doi:10.1016/j.ijepes.2022.108176

Cited by 11 publications

(2 citation statements)

References 26 publications

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“…Reference [22] integrated frequency control into a UC problem for an isolated microgrid, and [23] considered FR from smart loads. The primary and secondary frequency responses of high-voltage direct current (HVDC) were modeled and encoded into a UC model in [24]. However, the FR capabilities of RE were neglected in these works, and frequency security was difficult to establish due to diminishing SG.…”

Section: Nomenclaturementioning

confidence: 99%

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

Li,

Qiao,

et al. 2024

Journal of Modern Power Systems and Clean Energy

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As the proportion of renewable energy (RE) increases, the inertia and the primary frequency regulation (FR) capability of the power system decrease. Thus, ensuring frequency security in the scheduling model has become a new technical requirement in power systems with a high share of RE. Due to a shortage of conventional synchronous generators, the frequency support of multi-source converters has become an indispensable part of the system frequency resources, especially variable-speed wind turbine generation (WTG) and battery energy storage (BES). Quantitative expression of the FR capability of multi-source converters is necessary to construct frequency-constrained scheduling model. However, the frequency support performance of these converter-interfaced devices is related to their working states, operation modes, and parameters, and the complex coupling of these factors has not been fully exploited in existing models. In this study, we propose an integrated frequency-constrained scheduling model considering the coordination of FR capabilities from multi-source converters. Switchable FR control strategies and variable FR parameters for WTG with or without reserved power are modeled, and multi-target allocation of BES capacity between tracking dispatch instruction and emergency FR is analyzed. Then, the variable FR capabilities of WTG and BES are embedded into the integrated frequency-constrained scheduling model. The nonlinear constraints for frequency security are precisely linearized through an improved iteration-based strategy. The effectiveness of the proposed model is verified in a modified IEEE 24-bus standard system. The results suggest that the coordinated participation of BES and WTG in FR can effectively reduce the cost of the scheduling model while meeting frequency security constraints.

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Section: Nomenclaturementioning

confidence: 99%

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

Li,

Qiao,

et al. 2024

Journal of Modern Power Systems and Clean Energy

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“…The high proportion of HVDC transmission operation power to the total demand of the receiving-end power grid replaces many synchronous generators, leading to the decline of system inertia [2,3]. A disturbance with the same amount of power loss can cause a larger rate of change of frequency and a larger frequency deviation under low inertia conditions [4,5]. In recent years, several HVDC blocking disturbances occurred.…”

Section: Introductionmentioning

confidence: 99%

Coordination of Multiple Flexible Resources Considering Virtual Power Plants and Emergency Frequency Control

et al. 2023

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High-voltage direct current (HVDC) blocking disturbance leads to large power losses in the receiving-end power grid, and the event-driven emergency frequency control (EFC) is an important measure to prevent large frequency deviation. By aggregating controllable distributed energy resources (DERs) on the demand side, a virtual power plant (VPP) could quickly reduce its power and can be a new fast response resource for EFC. Considering both the VPP and the traditional control resources, this paper proposes an optimized EFC strategy coordinating multiple resources for the receiving-end power grid with multi-infeed HVDC. The approximate aggregation model of the VPP response process is constructed, based on which the EFC strategy, aiming at minimizing the total control cost while meeting constraints on rotor angle stability and frequency deviation security, is proposed. The electromechanical transient simulation combined with particle swarm optimization (PSO) is utilized to solve the model, and parallel computation is utilized to accelerate the solving process. The effectiveness of the proposed EFC strategy is verified by a provincial receiving-end power grid with multi-infeed HVDC. The detailed simulation results show that VPP could dramatically reduce the control cost of EFC while maintaining the same stability margin.

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Overcoming the uncertainty and volatility of wind power: Day-ahead scheduling of hydro-wind hybrid power generation system by coordinating power regulation and frequency response flexibility

Han

Zhao

et al. 2023

Applied Energy

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Coordinative frequency-constrained unit commitment model for HVDC interconnected AC systems

Cited by 11 publications

References 26 publications

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

Coordination of Multiple Flexible Resources Considering Virtual Power Plants and Emergency Frequency Control

Overcoming the uncertainty and volatility of wind power: Day-ahead scheduling of hydro-wind hybrid power generation system by coordinating power regulation and frequency response flexibility

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