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- Abstract：The new power system with high proportion of new energy and power electronic equipment is an important means to achieve the goal of “double carbon”, but the new power system will also bring a series of unstable problems. In the new power system, grid-forming control technology (GFM) has the characteristics of voltage support and active inertia, which can replace synchronous machine to realize grid support and maintain power system stability. Therefore, GFM has a broad development and application prospect. Based on this, this paper first briefly introduced the topology of energy storage converter, and selected its type according to the control characteristics of GFM technology. After that, a reasonable summary and analysis of the existing control strategies of GFM was made, the current research difficulties, problems and challenges in the development process and the research prospects were put forward, and the ideas for the construction of grid-forming construction were provided.Keywords：new power system;grid-forming;converter;topology;control strategy209|1361|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06
Shared Energy Storage Trading Mode of New Energy Station Group Considering Energy Storage Performance Difference AI Introduction
Abstract：To clarify the complex coupling relationship between the technical and economic characteristics of energy storage batteries participating in sharing and the price mechanism and income distribution of shared energy storage, a shared energy storage trading mode of the new energy field and station group considering the difference of energy storage performance was proposed. Firstly, the operation mode of the new energy field group shared energy storage based on self-assigned energy storage was proposed to break the constraints of new energy field stations participating in energy storage resource shared interaction. Secondly, considering the health status of batteries in different energy storage resources and the interests of multi-participants in shared energy storage, the price mechanism and income distribution method of shared energy storage on the power generation side considering the different technical and economic characteristics of energy storage units were constructed. Finally, a numerical example was used to verify the feasibility of the proposed generation side shared energy storage trading mode considering the health status of energy storage batteries. The research results provide theoretical and decision support for the economic sustainable development of shared energy storage on the power generation side.Keywords：energy storage;performance difference;new energy station group;shared energy storage;trading mode;price mechanism42|72|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Topology and Control Method of Battery Energy Storage System for Application at the Scale of Hundreds of Megawatts AI Introduction
Abstract：With the increasing proportion of new energy in the total installed capacity, the capacity and scale of battery storage power stations are expanding. The improvement of unit capacity of battery energy storage system (BESS) has important engineering practical significance. To explore the BESS topology with more advantages in the face of the development trend of large capacity and large-scale battery storage power stations, the paper first analysed the problems of the traditional centralized BESS and the reasons why the voltage level and capacity of the single machine are limited. Then, the single unit capacity of three kinds of high voltage transformerless BESS was analysed through calculation, i.e. the star structure, triangle structure and modular multilevel structure. After that, the star structure was taken as an example to carry out a detailed study. The topological structure and mathematical model of star structure were introduced, and the basic control strategies of high voltage transformerless BESS were analysed, including the power control at the grid side and state of charge equalization control. The effectiveness of the control strategies was verified by 35 kV/10 MW simulation model. The research results show that the high voltage transformerless BESS has obvious advantages in single machine capacity and capacity expansion, and is more suitable for high-voltage, high-capacity applications.Keywords：battery energy storage system (BESS);star structure;triangular structure;modular multilevel structure106|122|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06- Abstract：Distributed energy storage (DES) is a key component in smart distribution networks and microgrids. As one of the current disruptive technologies, artificial intelligence (AI) is expected to change the traditional modeling, analysis, and control methods of DES and make DES more intelligent. The development of the AI application in the field of power systems and the applicability of the modern AI methods in DES were briefly reviewed. Then, the AI application directions and the related research trends in three DES of different scales, micro-grid, smart building, and vehicle-to-grid (V2G), were considered. Finally, the future development of AI in DES was presented, in order to provide useful reference for intelligent research and development of distributed energy storageKeywords：distributed energy storage;artificial intelligence;micro-grid;smart building;vehicle-to-grid82|215|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06
Energy Storage Capacity Allocation Scheme of Wind Farm Considering Multi-Objective Optimization Model AI Introduction
Abstract：A new scheme of lithium ion battery and super capacitor hybrid energy storage system in wind farm was proposed. The original wind power was decomposed by the wavelet packet frequency division technology to obtain the compensation power of the hybrid energy storage system. Taking the hybrid energy storage configuration scheme as the optimization variable, the improved life cycle cost was introduced, and a multi-objective energy storage system configuration model of net income volatility waste air volume was established. The model was solved by the improved probabilistic mutation particle swarm optimization (PMPSO) to obtain the Pareto solution set. The solution set was normalized to obtain the optimal allocation scheme of entropy weight. Compared with the single objective optimal scheme, it shows that the optimal allocation scheme of entropy weight takes into account both economy and function. Compared with the adaptive quantum particle swarm optimization (AQPSO), it is verified that the optimal allocation scheme of entropy weight obtained by improved PMPSO algorithm not only ensures the small waste air volume and volatility, but also configures the energy storage with smaller capacity to obtain greater benefits and meet the multi-objective allocation requirements.Keywords：energy storage;wind farm;multi-objective solution;optimal allocation;lithium ion battery;super capacitor81|300|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Study on Steady State Power Model of Concentrated Solar Power With Heat Storage System AI Introduction
Abstract：Concentrated solar power (CSP) with heat storage system, as a clean power, owns the capability of generating power continuously and stably, peak shaving and providing system inertia, which is one of the technologies to effectively solve the volatility of renewable energy. This paper proposed a steady state power approximate mathematical model for CSP with heat storage. This model takes the solar radiance as the input, and utilizes the simplified proportional integral to simulate the photo-thermal-electric conversion and the heat storing process, wherein the output power control strategy is considered as well. The simulation results show that the model is in good agreement with the measured curves under sunny and cloudy conditions, and can be used to analyze the sensitivity of the power characteristics of CSP power stations to key parameters.Keywords：concentrated solar power (CSP);heat storage;steady state power;approximate mathematical model;sensitivity analysis62|215|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Research Progress of CaO-CO2 Thermochemical Heat Storage Technology for Concentrated Solar Power Plant AI Introduction
Abstract：Concentrated solar power technology is an important way to alleviate the energy crisis and improve the ecological environment. It can solve the contradiction between the discontinuous supply of solar energy and the continuous consumption of electric energy with a heat storage system. CaO-CO2 thermochemical heat storage technology has the advantages of wide sources, low cost and high heat storage density, and has a broad application prospect. Based on the review and summary of CaO-CO2 solar heat storage system, this paper introduced its thermal storage principle and integration scheme with concentrated solar power plant, analyzed the influencing factors of calcium-based material heat storage, and expounded the methods to improve the cyclic thermal storage performance and mechanical properties of calcium-based materials. This paper provides some beneficial reference and guidance for the design and preparation of high-performance calcium-based heat storage materials and their large-scale application and development in solar power plants.Keywords：solar thermal power generation;thermochemical heat storage technology;CaO-CO2 heat storage system;heat storage performance110|33|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06
New Energy Storage System
Prospect for Development Trend of Battery-Capacitor Technology AI Introduction
Abstract：The development of renewable energy is one of the most important guarantees to achieve carbon peak and carbon neutrality. However, the instability of solar energy, wind energy and other new energy sources has shown higher requirements on energy characteristic and power characteristic of energy storage devices. This paper firstly discussed the technical characteristics of traditional lithium-ion batteries and supercapacitors, and put forward the necessity of developing battery-capacitors technology under the new grid energy storage requirements. Then, the technical development trend of key materials for battery-capacitors was discussed in detail from three aspects: the improvement of cathode materials, improvement of anode materials, and innovation of electrode sheet structures, current collectors and electrode tabs. Finally, the three key elements of energy storage devices and their “two-in-one” or “three-in-one” effects were proposed to meet the diversified demands of cost, safety, power characteristic and energy characteristic, and the development trend of battery-capacitors was prospected.Keywords：renewable energy;energy storage;battery-capacitors;lithium-ion batteries;supercapacitors;three-dimensional current collectors;aluminium foam79|92|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Liquid Metal Battery Energy Storage Technology for Power System AI Introduction
Abstract：Electrochemical energy storage is flexible and efficient, and it is an important direction for the development of large-scale power energy storage technology. Liquid metal battery (LMB) uses liquid metals and molten inorganic salts as electrodes and electrolytes, respectively, to fundamentally avoid the life-limiting problem of traditional batteries. LMB has the advantages of long life, low cost, and large capacity, and has broad application prospects in the field of power system energy storage. This paper mainly introduced the working principle of LMB, focused on its development history and important research progress, and pointed out the limitations and challenges of existing battery systems. On this basis, the key development directions of LMB were discussed and clarified.Keywords：power system;electrochemical energy storage;liquid metal battery (LMB);liquid metal electrode;molten salt electrolyte104|78|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Performance Analysis and Application of Lithium Ion Capacitors AI Introduction
Abstract：As a new type of energy storage device, lithium ion capacitors not only have high energy density, but also have excellent power density and long cycle life. They have great application potential in high-power and long-life application scenarios. Firstly, this paper theoretically analyzed the reasons for the energy limitation of electrical double-layer capacitors and the performance improvement of lithium ion capacitors, and then compared and discussed the performance differences between lithium ion capacitors and electrical double-layer capacitors. Finally, the application potential of lithium ion capacitors in intelligent instruments, automotive energy conservation and emission reduction, new energy vehicles and renewable energy power generation and power storage was briefly analyzed. The results provide a theoretical basis for further improving the energy density of lithium ion capacitors, and point out the direction for the application of lithium ion capacitors.Keywords：new energy;energy storage;lithium ion capacitors;energy limitation principle;performance comparison78|91|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Health Status Assessment of Lithium-ion Battery Based on Fuzzy Comprehensive Evaluation AI Introduction
Abstract：Accurate assessment of the health status of lithium-ion batteries is of great significance for the safety of energy storage systems. Based on the data of a practical lithium-ion energy storage power station, the key parameters that affect the health status of lithium-ion batteries were refined firstly. After that, the effect factors in terms of battery voltage standard score, charging capacity and coulomb efficiency were analyzed, respectively. The single factor indicators through the coefficient of variation method were weighted. Finally, the fuzzy comprehensive evaluation method to quantitatively score the overall health status of batteries was used. According to the assessment, the lithium-ion batteries in the energy storage power station are in good overall health. 91.67% of the lithium-ion batteries have a health score of more than 85, and the remaining 8.33% of the lithium-ion batteries have a health score of less than 85 but still higher than 80. In addition, it is found from the single factor assessment that the consistency of batteries is poor. It is necessary to strengthen the observation of this part of the batteries. This paper provides a quantitative and in-situ non-destructive health status assessment method for lithium-ion batteries based on operation data, which has reference significance for guiding the operation and maintenance of energy storage power stations and ensuring the safe and stable operation.Keywords：energy storage;lithium-ion battery;health status assessment;coulomb efficiency;fuzzy comprehensive evaluation55|93|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Smart Separator Materials of Intrinsic Safe Lithium Battery for Large-scale Electric Energy Storge AI Introduction
Abstract：In order to achieve the goal of “carbon peak, carbon neutrality” and build a safe, stable, green and low-carbon modern energy system, lithium-ion batteries have attracted much attention as a typical electrochemical energy storage device. How to ensure the safe and stable operation of the power stations has become the primary issue with the scale of newly installed capacity expanding. Therefore, from the perspective of cell materials, aiming at the existing problems of commercial lithium battery separators, the work of intelligent separators in recent years was reviewed, including the modification of polyolefin separator materials, the design of new intelligent separator structures and the development of high temperature resistant polymer materials. The importance of developing high-safety separator materials was emphasized. Finally, the future research on separators of liquid and solid batteries was prospected, in order to provide a reference for further optimization and design of high-safety energy storage materials.Keywords：energy storage power station;separator;safety;lithium-ion battery;thermal runaway;solid electrolyte68|337|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Study on Heat Production Characteristics of Lithium-ion Batteries for Large Capacity Energy Storage AI Introduction
Abstract：It is important to study the heat production characteristics of large capacity energy storage lithium-ion battery cells for the design of thermal management of lithium-ion battery energy storage. The thermal conductivity and specific heat of the cell and the adiabatic temperature characteristics of the cell during charging and discharging were measured by experimental method. A heat transfer model considering the heat conduction inside the cell and the natural convection heat transfer between the surface of the cell and the ambient was presented. The maximum temperature and the maximum temperature rise of the cell during charging and discharging were obtained by numerical simulations. The variation of the surface temperature of the cell with time and the optimum-ion distance between the cells were obtained. At the same time, the variation trends of the cooling air quantity changing with the inlet air temperature were obtained. The results show that the heat production of lithium-ion battery with large capacity during charging is slightly higher than that during discharging.Keywords：thermal management;large capacity energy storage lithium-ion batteries;cell;heat production characteristics;numerical simulations136|96|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06Research on Battery Thermal Management of Pouch Cell Using a Phase Change Material-Based Thermal Switch AI Introduction
Abstract：In view of the battery thermal management system, this paper proposed a new battery temperature control device based on the phase change material stearic acid and thermal switches. The device is applied to the pouch cell. The cooling and heat preservation abilities were studied based on numerical simulation. It provides the passive drive for the thermal switch based on the volume change characteristics of the organic phase change material stearic acid during the phase change process, which can effectively dissipate heat when the battery temperature increases. Thermal energy dissipation is decreased when the battery is used in a cold environment. The numerical results show that, compared with the battery without the thermal management system, the temperature control system with the phase change material and thermal switch reduces the battery temperature by 22.46 ℃ at the end of the 4 C rate charge and discharge. When the external ambient temperature is -20 ℃, the novel thermal management system prolongs the battery temperature management time by 390 s.Keywords：lithium-ion battery;battery thermal management;thermal switch;phase change material;passive temperature control58|87|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-06
New Energy Storage Ontology Technology
