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Large-Scale renewable energy Transmission by HVDC: Challenges and Proposals

Engineering 2022年第12期19卷 252-267页

作者： Weisheng Wang Guanghui Li Jianbo Guo State Key Laboratory of the Operation and Control of Renewable Energy and Storage Systems China Electric Power Research InstituteBeijing 100192China

renewable energy transmission by high-voltage direct current(HVDC)has attracted increasing attention for the development and utilization of large-scale renewable energy under the Carbon Peak and Carbon Neutrality Strategy in ***-penetration power electronic systems(HPPESs)have gradually formed at the sending end of HVDC *** operation of such systems has undergone profound changes compared with traditional power systems dominated by synchronous *** stability issues,such as broadband oscillation and transient over-voltage,have emerged,causing tripping accidents in large-scale renewable energy *** analysis methods and design principles of traditional power systems are no longer suitable for *** this paper,the mechanisms of broadband oscillation and transient over-voltage are revealed,and analytical methods are proposed for HPPESs,including small-signal impedance analysis and electromagnetic transient *** of the theoretical research has been accomplished through its application in several practical projects in north,northwest,and northeast region of ***,suggestions for the construction and operation of the future renewable-energy-dominated power system are put forward.

关键词： Broadband oscillation Future power system HVDC transmission renewable energy generation Transient over-voltage

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Optimization dispatching strategy for an energy storage system considering its unused capacity sharing

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Global energy Interconnection 2024年第5期7卷 590-602页

作者： Hejun Yang Zhaochen Yang Siyang Liu Dabo Zhang Yun Yu Anhui Province Key Laboratory of Renewable Energy Utilization and Energy Saving Hefei University of TechnologyHefei 230009P.R.China State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteBeijing 100192P.R.China Department of Energy Technology Aalborg UniversityAalborg 9220Denmark

In renewable energy systems,energy storage systems can reduce the power fluctuation of renewable energy sources and compensate for the prediction ***,if the renewable energy prediction deviation is small,the energy storage system may work in an underutilized *** efficiently utilize a renewable-energy-sided energy storage system(RES),this study proposed an optimization dispatching strategy for an energy storage system considering its unused capacity ***,this study proposed an unused capacity-sharing strategy for the RES to fully utilize the storage’s unused capacity and elevate the storage’s service ***,RES was divided into“deviation-compensating energy storage(DES)”and“sharing energy storage(SES)”to clarify the function of RES in the operation ***,this study established an optimized dispatching model to achieve the lowest system operating cost wherein the unused capacity-sharing strategy could be ***,a case study was investigated,and the results indicated that the proposed model and algorithm effectively improved the utilization of renewable-energy-side energy storage systems,thereby reducing the total operation cost and pressure on peak shaving.

关键词： renewable energy energy storage system Sharing energy storage Power system dispatching Peak shaving

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A Temporary Frequency Response Strategy Using a Voltage Source-Based PermanentMagnet Synchronous Generator and energy storage systems

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energy Engineering 2024年第2期121卷 541-555页

作者： Baogang Chen Fenglin Miao Jing Yang Chen Qi Wenyan Ji CSIC HaiZhuangWindpower Co. Ltd.Chongqing400000China State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteBeijing100000China

energy storage systems(ESS)and permanent magnet synchronous generators(PMSG)are speculated to be able to exhibit frequency regulation capabilities by adding differential and proportional control loops with different control *** available PMSG kinetic energy and charging/discharging capacities of the ESS were *** improve the inertia response and frequency control capability,we propose a short-term frequency support strategy for the ESS and *** this end,the weights were embedded in the control loops to adjust the participation of the differential and proportional controls based on the system frequency *** effectiveness of the proposed control strategy was verified using PSCAD/*** simulations revealed that the proposed strategy could improve the maximum rate of change of the frequency nadir and maximum frequency ***,it provides a promising solution of ancillary services for frequency regulation of PMSG and ESS.

关键词： Inertial control PMSG ESS wind power generation frequency support

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Optimal Dispatch for Battery energy storage Station in Distribution Network Considering Voltage Distribution Improvement and Peak Load Shifting

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Journal of Modern Power systems and Clean energy 2022年第1期10卷 131-139页

作者： Xiangjun Li Rui Ma Wei Gan Shijie Yan State Key Laboratory of Control and Operation of Renewable Energy and Storage Systems China Electric Power Research InstituteBeijingChina College of Information and Engineering Northeastern UniversityShenyangChina

Distribution networks are commonly used to demonstrate low-voltage problems.A new method to improve voltage quality is using battery energy storage stations(BESSs),which has a four-quadrant regulating *** this paper,an optimal dispatching model of a distributed BESS considering peak load shifting is proposed to improve the voltage distribution in a distribution *** objective function is to minimize the power exchange cost between the distribution network and the transmission network and the penalty cost of the voltage *** the process,various constraints are considered,including the node power balance,single/two-way power flow,peak load shifting,line capacity,voltage deviation,photovoltaic station operation,main transformer capacity,and power factor of the distribution *** big M method is used to linearize the nonlinear variables in the objective function and constraints,and the model is transformed into a mixed-integer linear programming problem,which significantly improves the model *** are performed using the modified IEEE 33-node system.A typical time period is selected to analyze the node voltage variation,and the results show that the maximum voltage deviation can be reduced from 14.06%to 4.54%.The maximum peak-valley difference of the system can be reduced from 8.83 to 4.23 MW,and the voltage qualification rate can be significantly ***,the validity of the proposed model is verified through simulations.

关键词： energy storage station distribution network voltage regulation peak load shifting mixed integer programming

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Modeling and Dynamic Performance Analysis of Grid Forming Doubly-fed Wind Turbine 6

Modeling and Dynamic Performance Analysis of Grid Forming Do...

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6th IEEE International Electrical and energy Conference, CIEEC 2023

作者： Zhang, Xiaotong Qin, Shiyao Li, Shaolin Qi, Chen China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China

ISBN: (纸本)9798350346671

The doubly-fed wind turbine based on grid forming control has the ability to establish terminal voltage independently and maintain stability, but the quantitative analysis of grid-connected stability and dynamic performance is insufficient, which affects the engineering application. To solve this problem, a small signal analysis model of grid forming controlled doubly-fed wind turbine is established. And based on the oscillation mode and participation factor analysis, this essay finds out the dominant modes which are influenced by grid forming control and key control parameters. Furthermore, based on the root locus analysis, the influence of grid strength and key control parameters on the stability and dynamic performance of the system is revealed as well as the variation law. Finally, the simulation model of the grid forming doubly-fed wind turbine is built in MATLAB/Simulink, and the simulation proves the accuracy and effectiveness of the theoretical analysis, which is expected to guide the popularization and application of the grid forming doubly-fed wind turbine. © 2023 IEEE.

关键词： Wind turbines

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An Open-circuit Fault Diagnosis Method for Power Switching Devices of DC Charging Piles of Electric Vehicles Based on Model Predictive control Strategy 6

An Open-circuit Fault Diagnosis Method for Power Switching D...

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6th International Conference on energy, Electrical and Power Engineering, CEEPE 2023

作者： Li, Hongtao Ding, Mingchang Dong, Yinghua Li, Yuan Zhao, Chao Zhang, Shuangqing China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Nanjing China

ISBN: (纸本)9798350348279

Aiming at the open circuit fault of power switching devices which is common in the DC charging pile of electric vehicles, a real-time fault diagnosis method of electric vehicle charging pile based on model predictive control is proposed in this paper. The model predictive current control method is adopted to replace the PI controller in the current loop of the traditional PWM rectifier. On this basis, the switch state of the rectifier applied under the open circuit fault of the power switching devices is compared with the optimal switch state obtained by model predictive control, and the fault feature signal is established to realize the fault diagnosis and positioning of the charging pile power switching devices. Since the fault feature signals of different power switching devices have no influence on each other, this method has significant effect on single tube, double tube, and multiple tube simultaneously fault. The simulation results verify the correctness and effectiveness of the proposed fault diagnosis method for charging piles. © 2023 IEEE.

关键词： Failure analysis

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Capacity Coordinated Optimization of Battery, Thermal and Hydrogen storage System for Multi-energy Complementary Power System 6

Capacity Coordinated Optimization of Battery, Thermal and Hy...

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6th IEEE International Electrical and energy Conference, CIEEC 2023

作者： Li, Pai Han, Peidong Liu, Siyang Zhang, Jinping China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China

ISBN: (纸本)9798350346671

For a multi-energy complementary power system containing wind power, photovoltaic, concentrating solar power and electric/thermal/hydrogen multi-type energy storage, the coordinated and optimal allocation of the capacity of various types of energy storage devices is important to improve the system operation economy and cleanliness. A coordinated and optimal allocation method of electric/thermal/hydrogen energy storage capacity for multi-energy complementary power system based on time-series production simulation is proposed. An electric/thermal/hydrogen storage capacity optimization model is established with the objective of maximizing the system's combined annual value gain and considering the system energy outgoing, renewable energy utilization rate and the operating constraints of various power sources and storage systems. Finally, based on the idea of time-series production simulation, the optimal configuration capacity of electric/thermal/hydrogen energy storage that takes into account economic, safety and cleanliness constraints is obtained by optimal solution with the theoretical output of 8760h of scenery for the whole year as input. The example is validated based on a multi-energy complementary power system in northwest China, and the impact of system operation mode, operation strategy, cost and tariff on the capacity allocation results is quantified and analyzed to verify the effectiveness of the method. © 2023 IEEE.

关键词： Hydrogen storage

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Photovoltaic inverter model parameter testing method based on on-site operation data and hardware in the loop testing 12

Photovoltaic inverter model parameter testing method based o...

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12th International Conference on renewable Power Generation, RPG 2023

作者： Zhang, Xiaolin Yao, Guangxiu Dong, Wei Ding, Ming Chang State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China

As the penetration rate of new energy increases, the interactions between new energy power stations and grid are becoming stronger. GB 38755-2019 "Code on security and stability for power system" clarifies new requirements for photovoltaic power generation from the perspective of power systems. Accurate photovoltaic power station models are the basis for conducting photovoltaic grid connection analysis, and have significant practical applications for analyzing photovoltaic power station access to power systems. Currently, the electromechanical transient model parameters of photovoltaic inverters are obtained based on laboratory parameter test data, without considering the optimization of photovoltaic inverter parameters under different grid conditions on site, resulting in significant deviations between the existing photovoltaic inverter model external characteristics and the on-site photovoltaic inverter operating characteristics of the power station. Therefore, this paper specifies the photovoltaic inverter model parameter requirements based on the power system simulation analysis requirements, proposes a photovoltaic inverter model parameter testing method based on on-site operation data and hardware in the loop testing. carries out key parameter identification based on particle swarm optimization algorithm. Finally, the correctness and feasibility of the proposed parameter testing method is verified based on a photovoltaic power station case in northwest China. © The Institution of Engineering & Technology 2023.

关键词： Synthetic apertures

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MOF-derived molybdenum selenide on Ti_(3)C_(2)T_(x) with superior capacitive performance for lithium-ion capacitors

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 1061-1072页

作者： Jianjian Zhong Lu Qin Jianling Li Zhe Yang Kai Yang Mingjie Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research InstituteBeijing 100192China

Two-dimensional Ti_(3)C_(2)T_(x) exhibits outstanding rate property and cycle performance in lithium-ion capacitors(LICs)due to its unique layered structure,excellent electronic conductivity,and high specific surface ***,like graphene,Ti_(3)C_(2)T_(x) restacks during electrochemical cycling due to hydrogen bonding or van der Waals forces,leading to a decrease in the specific surface area and an increase in the diffusion distance of electrolyte ions between the interlayer of the ***,a transition metal selenide MoSe_(2) with a special three-stacked atomic layered structure,derived from metal-organic framework(MOF),is introduced into the Ti_(3)C_(2)T_(x) structure through a solvo-thermal *** synergic effects of rapid Li+diffusion and pillaring effect from the MoSe_(2) and excellent conductivity from the Ti_(3)C_(2)T_(x) sheets endow the material with excellent electrochemical reaction kinetics and *** composite Ti_(3)C_(2)T_(x)@MoSe_(2) material exhibits a high capacity over 300 mAh·g^(-1) at 150 mA·g^(-1) and excellent rate property with a specific capacity of 150 mAh·g^(-1) at 1500 mA·g^(-1).Addition-ally,the material shows a superior capacitive contribution of 86.0%at 2.0 mV·s^(-1) due to the fast electrochemical reactions.A Ti_(3)C_(2)T_(x)@MoSe_(2)//AC LIC device is also fabricated and exhibits stable cycle performance.

关键词： two-dimensional titanium carbide molybdenum selenide solvothermal method electrochemical kinetics

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Fire Extinguishing Effect of Reignition Inhibitor on Lithium Iron Phosphate storage Battery Module 10th

Fire Extinguishing Effect of Reignition Inhibitor on Lithium...

引用

10th Frontier Academic Forum of Electrical Engineering, FAFEE 2022

作者： Zhang, Mingjie Yang, Kai Liu, Jialiang Lai, Yilin Liu, Hao Chen, Hao Fan, Maosong Geng, Mengmeng State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing100192 China

ISBN: (纸本)9789819934072

After fire extinguishing, there will be smoke generation, reignition, and the uncontrolled heat spread of lithium-ion batteries. Given this situation, the fire-extinguishing effect of heptafluoropropane combined with reignition inhibitors on lithium iron phosphate batteries used for energy storage and the amount of reignition inhibitors are analyzed in this paper. The experimental results show that the reignition inhibitor with high thermal stability can exist in liquid form for a long time to achieve long-time cooling of the battery. Therefore, it can effectively inhibit the internal thermal runaway reaction of the battery and then impede the battery's reignition and thermal runaway spread after the fire. The dosage test of reignition inhibitor show that the cooling effect of full submerged method is better than the half submerged method. In addition, the fully submerged method can absorb various particles, and electrolyte vapors brought out by combustion smoke, reduce the amount and concentration of smoke injection, and reduce the harm of smoke after thermal uncontrol of the battery. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Iron compounds

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