Synchronous Control Strategy with Input Voltage Feedforward for a Four-Switch Buck-Boost Converter Used in a Variable-Speed PMSG Energy Storage System

Tai, Liuchen; Lin, Mingyao; Wang, Jianhua; Hou, Chongsheng

doi:10.3390/electronics10192375

Cited by 6 publications

(7 citation statements)

References 20 publications

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“…WTG with variable speed and constant frequency is the mainstream type of WTG technology application at present, an example of which is a directly driven WTG with permanent magnet synchronous generators (D-PMSGs). This model is considered the WTG technology with the most potential for development in the future due to its long service life, convenient maintenance, and high efficiency [19,20]. Therefore, a D-PMSG was selected as the WTG model in the sending-end AC system with high-proportion wind power in this study.…”

Section: Model and Characteristics Of D-pmsgmentioning

confidence: 99%

“…Control scheme 3 could be adopted considering the need to reduce the overload risk of the HVAC system while mitigating HVDC's subsequent CFs. Briefly, 20 ms after the first CF was detected, the active acceleration control of WTG and the pitch angle control of WTG were carried out according to Equations ( 18) and (19). WTGs are no longer in the MPPT output mode, and the active power output of wind farms is significantly reduced; the specific changes of electrical quantities in the system are shown in the red curve in Figure 7 after this control scheme was adopted.…”

Section: Simulation Verification 61 Electromagnetic Transient Simulationmentioning

confidence: 99%

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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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Section: Model and Characteristics Of D-pmsgmentioning

confidence: 99%

Section: Simulation Verification 61 Electromagnetic Transient Simulationmentioning

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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“…The G id derived using SSA was verified using standard switch models provided in the LTspice software tool. Figure 14 shows the average model of the non-ideal buck converter; the CCM2 library model was used for validation [16]. Figure 15 shows the frequency response of the G id of the practical buck converter.…”

Section: Validation Using Ltspicementioning

confidence: 99%

“…In [15], the authors proposed a wide input voltage range DC-DC converter for auxiliary power supplies on solar power conversion circuits or railway vehicles, making use of the buck/boost and resonant circuits to realize this wide range. The authors in [16] designed a four-switch buck-boost (FSBB) converter with a wide input voltage range voltage conversion, catering to variable-speed energy storage systems with AC inputs and DC outputs. The switching average model is used to establish the small signal model of a non-ideal FSBB converter in all working conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Average Current in Non-Ideal Buck and Synchronous Buck Converters for Low Power Application

2021

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In this paper, a comparative analysis of the average switch/inductor current between ideal and non-ideal buck and synchronous buck converters is performed and verified against a standard LTspice model. The mathematical modeling of the converters was performed using volt-sec and amp-sec balance equations and analyzed using MATLAB/Simulink. The transients in the output voltage and the inductor current were observed. The transfer function of the switch current to the duty cycle (Gid) in open loop configuration for low-power converters operating in continuous conduction mode (CCM) was modeled using thestate space averaging (SSA) technique and analyzed using MATLAB/Simulink. Initially, using the volt-sec and amp-sec, balance equations for the converters were modeled. The switch current to duty ratio (Gid) was derived using the SSA technique and verified using standard average models available in LTspice software. Though the Gid was derived using various methods in earlier works, the analyses of parameters such as low frequency gain, stability, resonant frequency and the location of poles and zeros were not presented. It was observed that the converters were stable, and the non-ideal converter showed smaller resonant frequency than the ideal converter due to the equivalent series resistances (ESR) of the inductor and the capacitor. The non-ideal converters showed higher stability than the ideal converters due to the placement of the poles closer to the s-plane. However, the Gid of the non-ideal converters remained the same in the open loop configuration.

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“…Other techniques to reduce overshoot and improve efficiency are discussed in [5,6]. Undershoot reduction in buck mode was discussed in [7,8].The authors in [9], [10] claimed to achieve better stability and efficiency with lower overshoot and better stability [11]- [13]. Other techniques to reduce overshoot and improve efficiency are discussed in [14]- [16].Undershoot reduction is summarised in [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Quantitative evaluation measures for DC-DC converters

Muhammad

Amin

2023

IEICE Electron. Express

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The use of power electronics has increased in everyday applications such as portable devices, biomedical, electric vehicles, etc. One of the major issues in such devices is an overshoot observed in the output voltage. The desired output in the converters comes with the over/undershoot problem which affects their performance. State-of-the-art evaluation measures such as overshoot percentage, settling time, and rise time only analyze a certain aspect and do not estimate the true performance of the system. In this work, we propose two new evaluation measures to analyze the performance of the converters overcoming the limitations of existing measures, i) Total over-under shoot (TS) and ii) First shoot second shoot (FSSS). We also propose one composite evaluation metric Aoun stability-1 to provide a single quantitative measure to analyze the performance of the system. A basic converter with a PID controller and Machine Learning based model is used to highlight the limitations of the existing metrics and strengths of the proposed metrics. Experimental results also highlight the advantages of the proposed measures. The proposed work is also expected to attract attention from the signal processing community facing similar issues in many applications.

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Synchronous Control Strategy with Input Voltage Feedforward for a Four-Switch Buck-Boost Converter Used in a Variable-Speed PMSG Energy Storage System

Cited by 6 publications

References 20 publications

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

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

Modeling of Average Current in Non-Ideal Buck and Synchronous Buck Converters for Low Power Application

Quantitative evaluation measures for DC-DC converters

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