The document discusses three studies on different hybrid wind-solar power systems: 1. A study of a new multi-turbine wind-solar hybrid system in China, which showed the multi-turbine system produced more power than a single turbine system, especially at low wind speeds. 2. A study of a hybrid system in India using photovoltaics, wind, and battery storage controlled by LabVIEW software. 3. A study of optimizing wind and solar resources in Tripura, India, which found the photovoltaic system generated most power year-round, while wind contributed significantly for half the year. The levelized cost was $0.488/kWh with 90% renewable

1. 1. Multi-turbine wind-solar hybrid system
Abstract
In the paper, a new type of wind-solar hybrid system was proposed, in which multiple small
wind turbines took the place of a bigger one. The electricity performance of the multi-turbine
wind-solar hybrid system was studied in comparison with the traditional system. Two types of
wind-solar hybrid system with the same capacity were set up in Tianjin, and the power output of
the two systems were measured and simulated by the TRNSYS software. The results showed
that, at low wind speed, the multi-turbine wind-solar hybrid system has more power production
than the reference system. The simulated results agreed well with the experiment results. Then,
the electricity performance of the multi-turbine wind-solar hybrid system was studied under
various climates in China by the TRNSYS. The simulation results showed that the power output
of the wind turbines in multi-turbine wind-solar hybrid system increases by 18.69%, 31.24% and
53.79%, when used in Shenyang, shanghai and Guangzhou, respectively, compared with the
reference system.
Highlights
•Multi-turbine generating system can still work when one turbine is broken.
•Multi-turbine generating system consist of many small turbines has lower start wind speed and
more power output.
•Multi-turbine generating system hybrid with solar energy system has more stable power output.

2. 2. Modeling and control of hybrid photovoltaic wind power system
with battery storage
Abstract
In this paper, the model and the control of hybrid power system is presented. It comprises wind
and photovoltaic sources with battery storage supplying a load via an inverter. First, the design
and the identification of the hybrid power system components has been made, then the proposed
system is modeled and simulated under Matlab/Simulink Package. Finally, the power control of
the hybrid system is introduced, by using LabVIEW Software. The proposed control strategy has
been experimentally implemented and practical results are presented to show the effectiveness of
the proposed hybrid system.
Highlights
•Photovoltaic power systems.
•Wind power system.
•Battery storage.
•Power control is introduced, by using LabVIEW Software.
3. PV–wind hybrid power option for a low wind topography
Abstract
Solar and wind are clean energy sources with enormous potential to alleviate grid dependence.
The paper aims to optimally harness the wind resource with the support of solar energy through
hybrid technology for a north-east Indian state Tripura (low wind topography). Techno-economic
analysis of a photovoltaic (PV)-wind hybrid simulation model has been performed for small
scale application in an educational building. The study also evaluates the tangible performance of
a similar plant in practical condition of the site. It has emerged from the study that major energy
generation is turning out from PV segment which is promising almost all round the year.
Nonetheless, a considerable amount of wind power is found to be generated during half of the
year when average PV power production is comparatively less. The cost of electricity from the
simulation model is found to be $0.488/kWh while renewable fraction in the total electricity
share is obtained to be 0.90. From the actual performance of the plant, maximum wind
penetration is observed to be 32.75%.
Highlights
•Optimally harness the wind energy by unification of solar resource.
•Analysis of PV–wind hybrid system with tangible experience.
•Cost of generation and renewable fraction are $0.488/kWh and 0.90 respectively.

3. •Maximum wind penetration is observed to be 32.75% with installed PV–wind system.
•Indicative annual grid electricity conservation is 90%.