Research on power system flexibility considering uncertainties

Abstract

In order to help achieve the goal of carbon peak and carbon neutrality, the large-scale development and application of clean renewable energy, like wind generation and solar power, will become an important power source in the future. Large-scale clean renewable energy generation has the uncertain characteristics of intermittency, randomness, and volatility, which brings great challenges to the balance regulation and flexible operation of the power system. In addition, the rapid development of renewable energy has led to strong fluctuations in electricity prices in the power market. To ensure the safe, reliable, and economic operation of the power system, how to improve the power system flexibility in an uncertain environment has become a research hotspot. Considering the uncertainties, this article analyzes and summarizes the research progress related to power system flexibility from the perspective of power system planning, operation, and the electricity market. Aiming at the modeling technology of uncertainty, the related modeling methods including stochastic programming, robust optimization, and distributionally robust optimization are summarized from the perspective of mathematics, and the application of these methods in power system flexibility is discussed.

A two-stage robust generation expansion planning framework for regional integrated energy systems with carbon growth constraints

“…Two factors, the uncertainties and carbon emissions, are usually considered in the planning problems of integrated energy systems. The uncertainty is an unavoidable consideration when studying power generation expansion planning (Yang et al, 2022) summarized various uncertainty modeling methods and discussed the application of uncertainty modeling in power system planning and operation. For the integrated energy system, the uncertainties of renewable energy and energy demand are usually considered (Fang et al, 2021) considered the uncertainties of wind power and solar power in the planning of renewable energy generation and storage batteries in a renewable energy integrated microgrid (Shen et al, 2020) considered the uncertainties of load and wind power output at the same time when they studied the power generation expansion planning of the energy system (Ahmadi et al, 2020) proposed a dynamic, robust generation-transmission expansion planning in the presence of wind farms under long-term and short-term uncertainties of wind power (Lei et al, 2020) proposed a multiobjective stochastic planning method based on the multidimensional correlation scenario generation method for the regional integrated energy system integrated renewable energy considering the uncertainties of renewable energies and loads of multiple energy types.…”

New Urban Power Grid Dispatching Architecture and Key Technologies

“…At present, the urban power grid is uniformly dispatched by the provincial large power grid and operates passively as a load. Its internal flexibility resources are not fully exploited and utilized, and thus its flexibility is insufficient [13]. On the one hand, the adjustable load participating in the grid operation is small in scale and only gives play to the flexibility of a small part of the load.…”

Analysis of New Energy Consumption Capacity Considering Photovoltaic Uncertainty

“…In response to the "double carbon policy", new energy sources such as wind and solar energy are being exploited in large quantities. However, in the process of developing and utilizing new energy resources, the randomness and volatility of new energy resources often bring certain challenges to the planning and scheduling of new power systems, and the phenomenon of "abandoned wind and abandoned light" is particularly obvious [2]. Therefore, how to analyze and improve the capacity of new energy consumption while considering the uncertainty of new energy is the problem we need to solve now.…”