Power Generation Technology ›› 2020, Vol. 41 ›› Issue (1): 9-18.DOI: 10.12096/j.2096-4528.pgt.19173

• Key Technologies for Ubiquitous Power Internet of Things and Integrated • Previous Articles     Next Articles

Complementary Intelligent Optimization Operation Strategy of Wind-Solar-Hydro Multi-energy Power System

Wei HU1(),Yuchen QI1,Hongxuan ZHANG1,Ling DONG2,Yanhe LI2   

  1. 1 Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing 100084, China
    2 State Grid Qinghai Electric Power Company, Xining 810003, Qinghai Province, China
  • Received:2019-11-26 Published:2020-02-29 Online:2020-03-03
  • Supported by:
    National Key Research and Development Program of China(2017YFB0902200);Science and Technology Project of State Grid Corporation of China(5228001700CW)

Abstract:

For high-ratio renewable energy access to the grid, the utilization of wind-solar-hydro complementary power generation can provide a smooth and stable power supply. This paper proposed a short-term optimal operation method based on stochastic programming for the windsolar-hydro multi-energy power system, using big data and artificial intelligence technology. Firstly, based on the variational autoencoder (VAE), a renewable energy scenarios generation method was proposed, which can generate diverse scenarios that meet the characteristics of renewable energy output and accurately describe the correlation of renewable energy output. Secondly, based on the scenarios method, a short-term optimization operation model of wind-solar-hydro was established and a piecewise linearization method was used to transform various nonlinear constraints into linear constraints, which can achieve fast solution while ensuring the accuracy of the model. Finally, through the simulation of the wind-solarhydro power system in downstream of the Yalong River, it demonstrates the effectiveness of the intelligent optimization operation strategy proposed in this paper.

Key words: power system, complementation of windsolar-hydro, scenarios generation, variational autoencoder, optimal operation

CLC Number: