Economic analysis of grid integration of variable solar and wind power with conventional power system

Abstract Variable renewable electricity (VRE) is expected to play an important role in global decarbonization. However, due to VRE’s intermittency and uncertainty, integrating VRE into the power system may cause additional integration costs for both power systems and consumers. Estimating these integration costs can provide insights for power system planning, support policy making and power market designs. In this paper, the integration costs of wind and solar on both demand and supply sides are quantitatively investigated by an economic power dispatch model combined with Monte Carlo simulation. A case study of Guangdong Province in China is conducted under three scenarios of power mix changes (only increasing the VRE installation; replacing the existing coal-fired power; and replacing the existing coal-fired power without power storage). The results show that integration costs from both supply and demand sides are non-negligible when VRE replaces existing capacity, and the costs are increasing with the penetration rate of VRE. On supply side, it ranges from −2.3 to 12.1 $/MWh for wind penetration from 5% to 30%, and −5.5 to 7.1 $/MWh for that of solar penetration. Moreover, consumers on demand side will bear −7.3 to 185.9 $/MWh integration costs for wind and solar integration, which is much higher than the supply side. In addition, solar power has a lower integration cost than wind power due to a more consistent power output with the load curve of power demand on the time scale. Moreover, our results reveal that blindly reducing the renewable energy curtailment rate may not be cost-effective.

[1]  Chuntian Cheng,et al.  Reform and renewables in China: The architecture of Yunnan's hydropower dominated electricity market , 2018, Renewable and Sustainable Energy Reviews.

[2]  Li Li,et al.  Energy conservation and emission reduction policies for the electric power industry in China , 2011 .

[3]  Michael Milligan,et al.  Integration of Variable Generation, Cost-Causation, and Integration Costs , 2011 .

[4]  Alireza Soroudi,et al.  Decision making under uncertainty in energy systems: state of the art , 2013, ArXiv.

[5]  Margot Weijnen,et al.  The impact of inter-regional transmission grid expansion on China’s power sector decarbonization , 2016 .

[6]  K. Steininger,et al.  The economy-wide effects of large-scale renewable electricity expansion in Europe: The role of integration costs , 2019, Renewable Energy.

[7]  Ernst Worrell,et al.  Identifying barriers to large-scale integration of variable renewable electricity into the electricity market : A literature review of market design , 2018 .

[8]  T. Ancev,et al.  The effect of wind and solar power generation on wholesale electricity prices in Australia , 2019, Energy Policy.

[9]  Jiang Lin,et al.  Economic and carbon emission impacts of electricity market transition in China: A case study of Guangdong Province , 2019, Applied Energy.

[10]  A. Rezaee Jordehi,et al.  How to deal with uncertainties in electric power systems? A review , 2018, Renewable and Sustainable Energy Reviews.

[11]  H. Hottel.  A simple model for estimating the transmittance of direct solar radiation through clear atmospheres , 1976 .

[12]  G. Luderer,et al.  System LCOE: What are the Costs of Variable Renewables? , 2013 .

[13]  Joseph F. DeCarolis,et al.  The Costs of Wind's Variability: Is There a Threshold? , 2005 .

[14]  Jian Geng,et al.  Calculating Wind Variability Costs with Considering Ramping Costs of Conventional Power Plants , 2019, Journal of Electrical Engineering & Technology.

[15]  J. Edmonds,et al.  Roles of wind and solar energy in China’s power sector: Implications of intermittency constraints , 2018 .

[16]  O. Edenhofer,et al.  Integration costs revisited – An economic framework for wind and solar variability ☆ , 2015 .

[17]  Iain Staffell,et al.  Short-term integration costs of variable renewable energy: Wind curtailment and balancing in Britain and Germany , 2018 .

[18]  Judith Gurney.  BP Statistical Review of World Energy , 1985 .

[19]  Yi Ding,et al.  Economical flexibility options for integrating fluctuating wind energy in power systems: The case of China , 2018, Applied Energy.

[20]  Jin-Hua Xu,et al.  Inter-regional power grid planning up to 2030 in China considering renewable energy development and regional pollutant control: A multi-region bottom-up optimization model , 2016 .

[21]  Sufang Zhang,et al.  Using diverse market-based approaches to integrate renewable energy: Experiences from China , 2019, Energy Policy.

[22]  Paul Simshauser,et al.  The Hidden Costs of Wind Generation in a Thermal Power System: What Cost? , 2011 .

[23]  Shanlin Yang,et al.  Analysis of electricity consumption in China (1990–2016) using index decomposition and decoupling approach , 2019, Journal of Cleaner Production.

[24]  Jian-Lei Mo,et al.  Can carbon pricing support onshore wind power development in China? An assessment based on a large sample project dataset , 2018, Journal of Cleaner Production.