Battery charge-discharge control strategy based on the single Z-source three-level SVPWM inverter

Qu, Keqing; Niu, Qing Quan; Yang, Chong; Zhao, Jin Bin

doi:10.1109/asemd.2013.6780701

Cited by 7 publications

(9 citation statements)

References 3 publications

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“…Thus, it has higher steady precision and is also applied for PV boost converters [4]. Z-source inverter has proposed in recent years, which has less power devices compared with conventional two-stage inverter, which makes it have higher efficiency and compact structure [5,6]. In this paper, the principle of Z-source inverter is introduced.…”

Section: Introductionmentioning

confidence: 99%

Variable universe fuzzy controlled incremental conductance MPPT for Z-source PV inverter

Zhang¹,

Wang²,

Chen³

et al. 2015

Proceedings of the 2nd International Conference on Green Materials and Environmental Engineering

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Abstract-Maximum power point tracking (MPPT) is always a hot research area for photovoltaic (PV) system. In this paper, based on high efficiency Z-source PV inverter, a variable universe fuzzy controlled incremental conductance (Inc-Cond) is proposed for MPPT. After designed fuzzy sets and rules, parameters of exponential-type and proportional-type stretching functions are investigated in detail. The influence to system performance are also analyzed. Corresponding simulations of Z-source PV system are implemented in MATLAB/Simulink. Simulation results show that the selection of parameter values has significant impact on system response speed and steady precision. Finally, an example is given to verify the feasibility of proposed MPPT algorithm. Compared with conventional fuzzy controlled Inc-Cond, voltage and power of PV array are more stable during MPPT. Inverter output voltage is stable and its THD is approximate 0.86%.

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Section: Introductionmentioning

confidence: 99%

Variable universe fuzzy controlled incremental conductance MPPT for Z-source PV inverter

Zhang¹,

Wang²,

Chen³

et al. 2015

Proceedings of the 2nd International Conference on Green Materials and Environmental Engineering

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“…In this paper, the output current of ZSI is controlled under the synchronous reference [9,11], as shown in Fig. 1.…”

Section: Active and Reactive Power Control Of Zsimentioning

confidence: 99%

Unified control of Z‐source grid‐connected photovoltaic system with reactive power compensation and harmonics restraint: design and application

Zhang

2018

IET Renewable Power Generation

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Based on the Z-source inverter (ZSI), a unified control strategy of grid-connected photovoltaic (PV) system is investigated. It can both compensate the reactive power and restrain the current harmonics. At first, the principle of the proposed unified control is analysed. Then, the space vector pulse width modulation (SVPWM) is improved for inserting the shoot-through time into the modulation period. Simulation results show that the proposed unified control strategy is feasible and effective. Besides, a hardware controller is designed based on the digital signal processor (DSP). The corresponding approach for applying the improved SVPWM with the DSP and the driver circuit is illustrated in detail. Eventually, an experiment apparatus is implemented. Experiment results reveal that the proposed unified control strategy can effectively regulate active and reactive power generated by the grid-connected PV system. Besides, the fifth current harmonic of grid can be restrained effectively, the total harmonic distortion of the grid current decreases from 20.9 to 8.1%, which indicates that the restraint of the current harmonics is feasible for the proposed unified control strategy.

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“…Ho wever, the shoot-through duty should be inserted into modulation to boost voltage of Z-source. Based on the conventional SVPWM, a co mmon method is insert shootthrough time, T ST , into transition of two adjacent vectors [6,7]. In order to reduce switching loss of power devices, the symmetric 5 non-shoot-through vectors are combined with shoot-through vector.…”

Section: A Svpwm Control Of Z-source Invertermentioning

confidence: 99%

“…Based on modified SVPWM mentioned above, the inverter current loop is controlled by grid voltage orientation decouple method [6], as shown in FIGURE. 1.…”

Section: B Control Of Inverter Currentmentioning

confidence: 99%

Unified Control of Single-stage Z-source Grid-connected Photovoltaic System with Harmonics and Reactive Power Compensation

Zhang¹,

Wang²,

Chen³

et al. 2015

Proceedings of the 2015 International Conference on Modeling, Simulation and Applied Mathematics

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Based on conventional single-stage grid-connected photovoltaic (PV) Z-source inverter, the unified control combining with harmonic and reactive power compensation is proposed. The grid harmonics and reactive current are measured while PV system outputting power. Then corresponding reactive power compensation is implemented to improve grid power factor. In this paper, the principle of boosting voltage for Zsource network is illustrated. Harmonic measurement method based on the theory of instantaneous reactive power is applied. Then the single-neuron PID controller was designed for maximum power point tracing (MPPT) rapidly. The unified control strategy of the whole system is proposed based on S VPWM. S imulation results revealed the grid reactive power was decreased and output distorted current was improved significantly. Besides, when irradiance suddenly changed, Zsource inverter can still trace the new maximum power point, which verified proposed unified control is accurate and feasible.

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Battery charge-discharge control strategy based on the single Z-source three-level SVPWM inverter

Cited by 7 publications

References 3 publications

Variable universe fuzzy controlled incremental conductance MPPT for Z-source PV inverter

Variable universe fuzzy controlled incremental conductance MPPT for Z-source PV inverter

Unified control of Z‐source grid‐connected photovoltaic system with reactive power compensation and harmonics restraint: design and application

Unified Control of Single-stage Z-source Grid-connected Photovoltaic System with Harmonics and Reactive Power Compensation

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