A Robust Day-Ahead Electricity Market Clearing Model Considering Wind Power Penetration

Hongze Li,Fengyun Li,Xinhua Yu,Xuejie Wang,Yuwei Wang

doi:10.3390/en11071772

Abstract

With the development and grid-connection of renewable energy sources such as wind power, there are more and more uncertainties in power systems, and large-scale wind power has brought many challenges to the security and stability the systems. These uncertainties have to be eliminated by means of upward or downward regulations of conventional generators and charging/discharging services of energy storage devices. Based on the analysis of the influence of wind power uncertainties on the day-ahead electricity market, this article proposes a robust clearing model for the day-ahead electricity market considering the wind power penetration, which can help to complete the dispatch of power system. Compared with the traditional models, the proposed model is a multi-objective model, which considers both the lowest operating cost and the least wind power curtailment of power system. Moreover, the obtained dual multipliers λ corresponding to the power balance constraints reflect the marginal cost of the power production in a certain period, that is, the locational marginal price (LMP), which can be used as the clearing prices. This robust market clearing model takes into consideration the economic and reliability of the system operation and accommodates as much renewable energy as possible. The simulation of three wind power producers was implemented on the IEEE 30-bus test system, which verified the rationality of the proposed approaches.

Highlights

In recent years, with the continuous development of China’s wind power industry, the total installed capacity of wind power has increased
We present a robust market clearing mechanism for the day-ahead electricity market and used the proposed model to simulate the day-ahead market clearing, which contains wind power producers
With employing the robust market clearing model, day-ahead economic dispatch solution of the power market can be accommodated against any uncertainty output within the wind power uncertainty set, which ensures the wind power regulation capability in the electricity market, and generates reasonable locational marginal prices

Summary

Introduction

With the continuous development of China’s wind power industry, the total installed capacity of wind power has increased. Wind power is leading the transition from fossil energy to clean energy globally. By the end of 2015, China’s cumulative wind power installed capacity reached to 145,104 MW, making China the largest wind power installation country with 33.6% of the global share. China is a major country in both of the wind power installed capacity and wind power curtailment. In the first half of 2015, the average rate of wind power curtailment in China had reached. 15.2%, resulting in direct economic losses of more than 16 billion yuan. It is urgent to solve the wind power curtailment problem caused by large-scale wind power penetration in the power system

Results

Discussion

Conclusion