Study on the combined operation of a hydro-thermal-wind hybrid power system based on hydro-wind power compensating principles. (15th August 2019)

• Record Type: Journal Article
• Authors: Wang, Yimin; Zhao, Mingzhe; Chang, Jianxia; Wang, Xuebin; Tian, Yuyu
• Is Part Of: Energy conversion and management. Volume 194(2019)
• Page Start: 94
• Page End: 111
• Publication Date: 2019-08-15
• Subjects: Hydro-wind compensation -- Combined optimal operation mode -- Carbon dioxide emission -- Power grid; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2019.04.040
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: The principles of hydro-wind compensating operation are explored. Hydropower compensation for wind power in a power grid is quantitatively analyzed. The principles of hydro-wind compensation are used for the complementary operation of a power grid. Carbon dioxide emissions can be reduced while satisfying the load demand of the power grid. Abstract: The high randomness, intermittency and uncontrollability of wind power make large-scale wind power generation present large challenges for integration into a power grid. In this paper, the principles of hydro-wind compensating operation are explored, aiming at improving the power quality of wind power and promoting the integration of wind power into the power grid. Based on the principles of hydro-wind compensating operation, the calculation method of the hydropower compensation capacity for wind power is derived. Then, an optimizing operation model of a hydro-thermal-wind hybrid power system based on the hydro-wind power compensating principle is proposed to minimize the carbon dioxide emissions and obtain optimal operation scheduling of the hybrid power system by taking advantage of hydro-wind compensation and the peak regulation capacity of hydropower. In this model, the baseload and nonbaseload output emission rates are adopted to estimate the carbon dioxide emissions of different power output processes and the emission reduction benefits. Moreover, three scenarios of the operation mode are proposed to demonstrate the applicability of the hydro-wind power compensating principle in practice. The Northwest Power Grid in China is selected as a case study to verify the effectiveness of the proposed model compared to historical operating data. The results indicate that the hydro-wind power compensating principle plays a crucial role in hydro-thermal-wind combined optimal operation. Additionally, the proposed model can improve the wind power generation and reduce the carbon dioxide emissions of the power grid. In particular, the carbon dioxide emissions can be reduced by approximately 1696*10 4 t each year in the Northwest Power Grid. This study provides an approach to schedule optimal operation plans for power grids with large-scale wind power and provides a valuable reference for the large-scale utilization of other kinds of renewable energy worldwide.