A Special Issue “Planning and Optimal Operation of New-Type Power System” of Global Energy Interconnection

The power system,as an energy hub,plays a crucial role in the transformation of energy production and consumption.On July 19,2023,the International Energy Agency (IEA) released a Global Electricity Market Report for 2023-2024.This report indicates that the development of the world’s energy production is rapidly moving towards the critical point where the proportion of electricity generated from renewable sources surpasses that from non-renewable sources.Recently,the IEA's Annual Market Report on Renewable Energy for 2023 revealed that the globally newly installed capacity of renewable energy reached 510 GW,a 50% increase from 2022.The growth rate of installed capacity is faster than at any time in the past 30 years.The IEA predicts that,under existing policies and market conditions,the global installed capacity of renewable energy will reach 7,300 GW by 2028.By early 2025,renewable energy is expected to become the primary source of global electricity.The power system is transitioning from a simple system dominated by fossil fuel-based generation to a new-type power system with diverse participation from various new energy sources.

The new-type power system possesses several important characteristics∶ safety and efficiency,cleanliness and low carbon,flexibility and agility,and intelligent integration.However,with the integration of a high proportion of renewable energy and power electronic devices into the grid,the operation states of the power grid become complex and volatile.Large-scale renewable energy generation exhibits strong intermittency,randomness,and fluctuation.Additionally,renewable energy sources like wind and photovoltaics show intra-day and seasonal fluctuation characteristics,which do not align with the actual power system load demands.The lack of rotational inertia weakens the power system’s ability to withstand faults,leading to strong uncertainty and spatiotemporally coupled dynamics.Moreover,due to the large number of nodes,diverse source-load types,and complex network structures,the computational complexity of issues such as planning,design,operational scheduling,and market decisions is gradually increasing.

Currently,research on the planning of the new-type power system around the world is still at its early stages and requires further ref inement and development.The planning of the new-type power system is a crucial technical prerequisite leading the green and low-carbon development and transformation of the power system.The new-type power system will exhibit a structural form of both widely centralized and locally distributed generation,and will involve coordinated operation and balance mechanisms for the “source-gridload-storage”,as well as a new market mechanism and governance model for electricity-carbon coordination.Therefore,there is an urgent need to study the key technical issues that support the planning and operational optimization of the new-type power system.

This special issue includes three sections∶ Planning and Optimal Operation of New-Type Power System,Clean Energy,and Smart Grid.It compiles 10 papers from renowned universities and research institutes.We believe that this special issue will contribute to achieving the future coordinated goals of economy,safety,and greenness in the new-type power system.It aims to optimize the allocation of resources for the coordinated “source-grid-load-storage”,enhance the overall energy utilization efficiency,and ensure the safe and stable operation of the power system.

Yanhui Xu is a professor and Ph.D.supervisor and serves as a vice dean with the School of Electrical and Electronic Engineering,North China Electric Power University.His research interests include dynamic power system analysis,power system sub-synchronous oscillation,low-frequency oscillation,and load modeling.He has authorized more than 30 Chinese invention patents,published over 100 academic papers and presided over more than 30 projects.He is IEEE senior Member,member of editorial boards of Global Energy Interconnection.He serves as the standing director of hydrogen energy storage subcommittee of the IEEE PES energy storage &stationary battery satellite committee-China,and the standing director of sub-committee of the IEEE PES power system protection and control technical committee.

Xisheng Tang is a professor and the former director with the Energy Storage and Power System Applications Research Group,the Institute of Electrical Engineering,Chinese Academy of Sciences.He mainly engaged in R&D of renewable energy based power system,advanced energy storage system technologies,micro-grid technologies.He is a senior member of IEEE and the Secretary General of IEEE PES Energy Storage and Stationary Battery Satellite Committee-China.

Qiteng Hong is presently a Reader at the University of Strathclyde in the UK.He received his BEng(Hons) degree as the top graduate in 2011 and PhD in 2015,both from Strathclyde.His research area is protection and control of power systems with high penetrations of renewables.He has 80+publications in international journals and conferences.He is a Member of CIGRE Working Group (WG) B5.50,IEEE WG P2004,and IET DPSP Conference Technical Committee;he was the Technical Lead at the CIGRE UK NGN between 2016-2020 and the Honorary Secretary for the IET Scotland South West Committee until 2018.