Speech Title: Electrical Characteristic Modeling and Situation Awareness of Large-scale Energy Storage Systems

Abstract: As a critical component in the construction of new power systems, large-scale energy storage systems have not yet fully matured in terms of application technology, and still face numerous technical bottlenecks and challenges. This report provides a detailed introduction to the construction method of a multi-feature composite modeling mechanism for large-scale energy storage systems, aiming to achieve reliable monitoring of core state parameters. The specific contents include: 1) Building an electric-thermal-electrochemical multi-feature composite optimization model to accurately characterize the internal properties of batteries, overcoming the challenges of dynamic response of electrical parameters and nonlinear analysis of electrical characteristics; 2) Proposing a new algorithm for online estimation of multi-dimensional information fusion, breaking through the bottleneck of collaborative estimation of state parameters across multiple time scales, achieving innovation in real-time monitoring and early warning of electrical states, significantly enhancing the intelligence level and reliability of safety monitoring in large-scale energy storage systems; 3) Forming a dual amplification isolation and multiple EMC protection mechanism, solving the extreme new energy and energy conversion storage challenges from the device level to the system level, and achieving industrial application.

Speech Title: Inverter-based Resources (IBRs) Uptake and Intelligent Control in Power Systems

Abstract: Electricity systems around the world are experiencing a radical transition as the consequence of replacing fossil fuels, used for electricity production, by sustainable and cleaner energies. The growing penetration of renewable energies requires smarter techniques capable of handling the uncertainties of these intermittent sources. Along with this change, traditionally centralised power systems are also converting into distributed self-sufficient systems, often referred to as microgrids, that can operate independently. Virtual power plants are frameworks under which microgrids can be deployed within communities and enable energy transaction amongst retailers, customers and private investors. Inverter-based resources are the key building blocks of microgrids and virtual power plants and need an intelligent control mechanism. This talk will focus on the role of highly integrated inverter-based resources in power systems in the form of microgrids and virtual power plants for energy transition plans and will discuss their benefits and challenges.

Speech Title: New Power System Architecture for Homestay Microgrid 

Abstract: In China, where green electricity is rapidly becoming popular, the photovoltaic industry is developing rapidly and is reshaping the traditional energy landscape. The distribution network in big cities adapts to the volatility of green electricity by strengthening energy storage resources, while rural homestays use distributed microgrids to achieve integrated power generation and consumption, effectively reducing their dependence on traditional power grids. This transformation is not only a technological breakthrough, but also a vivid practice of the concept of energy Internet. The core of the energy internet lies in "bit management watt", that is, to drive the upgrading of the energy system through digital and intelligent means, to build a flexible and efficient energy use ecology through "software definition scenario", so that the homestay of thousands of households in the countryside can develop into their own independent micro grid, to achieve free flow and trade of energy, and to create a distributed large grid supported by the next generation of homestay micro grid.

Speech Title: Research on Optimal Control Technologies for AC/DC Distribution Systems with Multi-level Accommodation of Distributed Generation

Abstract: In the new power system, synchronous generators are gradually being replaced by distributed generation, with high-penetration renewable energy widely integrated, exhibiting significant power randomness and fluctuations. As a critical link in power supply to end-users, medium/low-voltage AC/DC distribution systems face challenges of spatiotemporal power imbalance and insufficient inertia. To address these key issues, this report will: First, analyze the typical characteristics of new AC/DC distribution systems under "double-high" conditions (high renewable penetration & high power electronics proportion); Then, discuss flexible control technologies for distributed generation from perspectives of: balanced dispatch, coordinated operation, precise control; Finally, summarize our team's achievements to promote academic exchange in new power system development.