Unified Control of Single-stage Z-source Grid-connected Photovoltaic System with Harmonics and Reactive Power Compensation
Jingwei Zhang, Honghua Wang, Chengliang Wang, Zhebei Wang, Wei Han, Rong Sun
Available Online August 2015.
- https://doi.org/10.2991/msam-15.2015.9How to use a DOI?
- Z-source inverter; grid-connected PV system; reactive power compensation; harmonic current restrain; SVPWM; single-neuron PID
- 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 Z-source 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 SVPWM. Simulation results revealed the grid reactive power was decreased and output distorted current was improved significantly. Besides, when irradiance suddenly changed, Z-source inverter can still trace the new maximum power point, which verified proposed unified control is accurate and feasible.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Jingwei Zhang AU - Honghua Wang AU - Chengliang Wang AU - Zhebei Wang AU - Wei Han AU - Rong Sun PY - 2015/08 DA - 2015/08 TI - Unified Control of Single-stage Z-source Grid-connected Photovoltaic System with Harmonics and Reactive Power Compensation PB - Atlantis Press SP - 37 EP - 41 SN - 1951-6851 UR - https://doi.org/10.2991/msam-15.2015.9 DO - https://doi.org/10.2991/msam-15.2015.9 ID - Zhang2015/08 ER -