Composite DC Power Flow Controller

Xu, Zhong; Zhu, Miao; Chi, Yongning; Liu, Siqi; Cai, Xu

doi:10.1109/tpel.2019.2936773

Cited by 26 publications

(7 citation statements)

References 27 publications

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“…Table I shows a comparison between the proposed DC-UP-QC and other existing DC control strategies, including the control method in [39], DC-PFC in [40], IUPS in [43], SVR in [45], and SMES-TLSVR in [46]. The attractive features of the proposed DC-UPQC can be summarized as follows.…”

Section: Comparison With Other DC Control Strategiesmentioning

confidence: 99%

“…Based on the structure, the DC custom power devices (CPDs) can be categorized into two main classifications, i.e., series CPD (SCPD) and parallel CPD (PCPD). PCPDs including various kinds of energy storage interfaced to power grid via power-electronic-based converters [36] - [38], active power filter [39], and power flow controller [40]- [42] provide an additional shunt path to regulate the current quality of the DC transmission line. They can filter the DC current ripple or smooth the time-varying stochastic power caused by the intermittent renewable energy sources.…”

Section: Introductionmentioning

confidence: 99%

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Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG

Yang

Jin

Zhou

et al. 2022

Journal of Modern Power Systems and Clean Energy

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The development of DC custom power protection devices is still in infancy that confines the sensitive loads integrated into medium-voltage (MV) and low-voltage (LV) DC networks. Considering the DC doubly-fed induction generator (DC-DFIG) based wind energy conversion system (WECS), this paper proposes a dual active bridge (DAB) based DC unified power quality conditioner (DC-UPQC) with the integration of superconducting magnetic energy storage (SMES) to maintain the terminal voltage of DC-DFIG and regulate the current flow. The principle of the proposed DC-UPQC has three parts, i.e., parallel-side DAB (PDAB), series-side DAB (SDAB), and SMES, used for the voltage compensation, current and power regulation, and energy storage, respectively. The circuit principle of the PDAB and SDAB and the modeling of SMES are analyzed in this paper. A DC dual control strategy is also proposed to deal with the DC voltage oscillation generated by the AC-side asymmetrical fault. A case study of DC-DFIG interfaced with DC power grid is carried out, integrated with the proposed SMES-based DC-UPQC to verify the high-power applications of the proposed structure. Finally, an experiment is implemented, and the results demonstrate the correctness of the theoretical analysis and the feasibility of the proposed structure.

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Section: Comparison With Other DC Control Strategiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG

Yang

Jin

Zhou

et al. 2022

Journal of Modern Power Systems and Clean Energy

View full text Add to dashboard Cite

show abstract

“…Therefore, an active alternating current (AC) interconnection device is urgently required to control power effectively at the loop closure point and ensure the safe operation of the loop closure, significantly improving the power supply reliability of a distribution network [3]. Current equipment with line power regulation capabilities include the smart soft open point (SOP) [4], the unified power flow controller (UPFC) [5], and the electromagnetic rotary power flow controller (RPFC) [6].…”

Section: Introductionmentioning

confidence: 99%

An accurate power control strategy for electromagnetic rotary power controllers

Yan

Shao

Jia

et al. 2023

Preprint

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With the rapid development of active distribution networks, the “petal”-type distribution network has become the mainstream power supply structure. To ensure the safe and reliable power supply of a distribution system, power control methods for active distribution networks should be further studied. An electromagnetic rotary power flow controller (RPFC) is a feasible solution for active distribution network power control. However, when testing the effectiveness of the PQ decoupled control method for RPFC based on instantaneous reactive power theory, difficulties were encountered with the synchronous control of the rotor position angle of two rotating-phase transformers, and the accuracy of power control was unsatisfactory. Given this condition, PQ control is improved in three ways. First, the system periodic oscillation problem is solved via variable speed control. Second, the servo motor–rotary phase-shifting transformer synchronous rotation scheme is designed, reducing power control error and improving stability. The overshoot phenomenon in power control is improved using the variable domain fuzzy proportional–integral adaptive method. Experimental results show that the proposed advanced control scheme exhibits good dynamic and static performance in power control scenarios and achieves effective improvement of RPFC.

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“…Current equipment with line power regulation capability includes the smart soft open point (SOP) [4], the unified power flow controller (UPFC) [5], and the electromagnetic rotary power flow controller (RPFC) [6]. SOP is typically implemented as a back‐to‐back voltage‐source converter; it provides independent control of output voltage amplitude and phase at an access point by applying a control strategy to both converters to achieve bidirectional decoupling control of active and reactive power flowing through the interconnected line [7].…”

Section: Introductionmentioning

confidence: 99%

An accurate power control strategy for electromagnetic rotary power controllers

Yan

Shao

Jia

et al. 2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

With the rapid development of active distribution networks, the “petal”‐type distribution network has become the mainstream power supply structure. Power control methods for active distribution networks should be further studied to ensure the safe and reliable power supply of a distribution system. An electromagnetic rotary power flow controller (RPFC) is a feasible solution for controlling power in active distribution networks. However, when testing the effectiveness of the PQ decoupled control method for RPFC based on instantaneous reactive power theory, difficulties were encountered with the synchronous control of the rotor position angle of two rotating‐phase transformers, and the accuracy of power control was unsatisfactory. Given this condition, PQ control is improved in three ways. First, the system's periodic oscillation problem is solved via variable speed control. Second, the servo motor‐rotary phase‐shifting transformer synchronous rotation scheme, which reduces power control error and improves stability, is designed. Third, the overshoot phenomenon in power control is improved using the variable‐domain fuzzy proportional‐integral adaptive method. Experimental results show that the proposed advanced control scheme exhibits good dynamic and static performance in power control scenarios and achieves effective improvement in RPFC.

show abstract

Composite DC Power Flow Controller

Cited by 26 publications

References 27 publications

Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG

Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG

An accurate power control strategy for electromagnetic rotary power controllers

An accurate power control strategy for electromagnetic rotary power controllers

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