Reliability Evaluation Of Wind-PV Hybrid Power Generation Systems Based On Well-being Model

With the gradual drain of conventional energy sources and the increasing environmentpollution, renewable energy power generation technology development soon, includingwind, solar and other renewable energy power generation system is more and more get theattention of people. For wind and solar energy resources with season and day and night onthe complementary characteristics and its unique resource advantages, the wind/PV hybridpower generation has become an important part in the field of renewable energy powergeneration. However, because of wind power, photovoltaic power generation is affected bythe wind, solar resources that presents the volatility and intermittent, the reliable powersupply of wind/PV hybrid power generation system has become an important factor ofrestricting its development.This paper presents a well-being evaluation approach based on the Monte Carlosimulation for the reliability evaluation of off-grid wind/PV hybrid power generationsystem and the grid wind/PV hybrid power generation system, analyzes the effect ofrelated factors on the system reliability by the following several aspects:1. Asolar radiationmodel considering the change of the solar panel inclination has been developed, differentinclination change on the influence of photovoltaic panels to receive solar radiation hasbeen analyzed.2. The reliability of the wind/PV/diesel/storage isolated power system hasbeen evaluated, impact of the photovoltaic power generation, energy storage deviceparameters, the wind/PV capacity configuration and other factors on reliability of thesystem have been analyzed; the economy of different wind/PV capacity configuration ofwind/PV/diesel/storage isolated power system has been evaluated, and impact of capacityfactors on economy of the system have been analyzed.3. The reliability of differentlocations and with different wind/PV capacity configuration of grid-connected wind/PVhybrid power generation system has been evaluated, and the environment resources andcapacity factors that affect the reliability of the system have been analyzed; reliability ofgrid-connected wind/PV/storage power system have been evaluated based on the energystorage device operation strategy.4. The capacity credit of different locations and withdifferent capacity configuration of wind/PV hybrid power generation system has beenevaluated by estimating the effective load carrying capability that regard as a assessment standard of capacity credit; the impact of environment resources factors to the capacitycredit of the system have been analyzed.The results of researsh can be summarized as follows:1. The solar radiation modelhas been established in this paper can simulate the amount of solar radiation received byPV panels considering inclination.2. Under the condition of appropriate wind, solarresources, the reliability of wind/PV hybrid power system is higher than the single windpower or photovoltaic power system.3. Choosing the appropriate inclination ofphotovoltaic panels can improve the reliability of the wind/PV/diesel/storage isolatedpower system; charging and discharging efficiency of batteries have obvious influence onthe system’s reliability，the higher the charge-discharge efficiency, system reliability, thebetter; the reliability of the wind/PV/diesel/storage isolated power system can be improvedby increasing solar radiation, peak power and injection power of PV system and ratedcapacity of batteries, but after these parameter values more than a certain value, theimproving level of system reliability is not obvious.4. When the wind, solar resourcesconditions at a certain situation, the reliability of the wind/PV/diesel/storage isolated powersystem can be improved by increasing the ratio of the wind power in the total installedwind/PV power, at the same time, the economy costs and fuel costs can be reduced.5. Thewind/PV capacity configuration in certain cases, the reliability and capacity credit ofgrid-connected wind/PV hybrid power system can be improved by better environmentalresources; environmental resources in certain cases, the system reliability and capacitycredit can be influenced by efficiency and power characteristics of wind power, PV powerobviously; the proportion of wind/PV power capacity have been absorbed by the system incertain cases, reliability of wind/PV/storage power system have been improved at a degree.The methodology proposed and the results obtained should provide theoreticalsupport in planning and reliable operation of containing wind/PV hybrid power system andwind/PV/diesel/storage isolated power system, and provide reference in planning andoperation of power system particularly those systems with distributed power generationcontaining wind and solar energy.