Journal Article

Risk‐Constrained Optimal Scheduling in Water Distribution Systems Toward Real‐Time Pricing Electricity Market

Shao, Yu, Zhou, Xinhong, Yu, Tingchao, Zhang, Tuqiao, Chu, Shipeng

2024

Overview

In recent years, as a result of emerging renewable energy markets, several developed regions have already launched Real‐Time Pricing (RTP) strategies for electricity markets. Establishing optimal pump operation for water companies in RTP electricity markets presents a challenging problem. In a RTP market, both positive and negative electricity prices are possible. These negative prices create economically attractive opportunities for Water Distribution System (WDS) to dispatch their energy consumption. On the other hand, excessively high prices may put WDS at risk of supply disruptions and reduced service levels. However, the continuous development of wind power and photovoltaics results in more volatile and unpredictable fluctuations in the price of renewable energy. The risk arising from uncertainty in electricity prices can lead to a significant increase in actual costs. To address this issue, this paper develops an a posteriori random forest (AP‐RF) approach to forecast the probability density function of electricity prices for the next day and provide a risk‐constrained pump scheduling method toward RTP electricity market. The experimental results demonstrate that the developed method effectively addresses the issue of increased costs caused by inaccurate electricity price forecasting. Plain Language Summary With the emergence of renewable energy markets in recent years, several developed regions have introduced Real‐Time Pricing (RTP) strategies for their electricity markets. This has created a difficult challenge for water companies seeking to establish the optimal pump operation in RTP markets. This study investigates the use of a risk‐constrained optimization scheduling approach for water distribution networks to mitigate the risks associated with inaccurate real‐time electricity price forecasting. Our proposed method is designed to reduce the costs associated with inaccurate electricity price prediction. Key Points A robust pump scheduling approach toward real‐time electricity price market is developed Developing a posteriori random forest algorithm to predict the probability density function of Real‐time electricity price Optimal scheduling with risk constraints is an effective approach to mitigating the risks associated with inaccurate electricity forecasting

• Publisher: John Wiley & Sons, Inc,Wiley
• Subject: Alternative energy sources / Electricity / electricity costs / Electricity pricing / energy / Energy consumption / Energy costs / Energy industry / Forecasting / Market prices / markets / optimal scheduling / Photovoltaic cells / Photovoltaics / Prices / Probability density function / Probability density functions / probability distribution / Probability forecasting / real‐time electricity price / Renewable energy / Renewable resources / Risk / risk constraint / Risk reduction / Scheduling / solar energy / uncertainty / Water / Water distribution / water distribution system / Water distribution systems / Water engineering / Wind power