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Review on Modeling Technology of Energy Storage Converters for New Energy Generation 4

Review on Modeling Technology of Energy Storage Converters f...

引用

4th International Conference on Advanced Electrical and Energy systems, AEES 2023

作者： Xiangjun, Li Tianyu, Zhang Hanning, Li Meng, Niu State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing100192 China

ISBN: (纸本)9798350342659

With a large proportion of new energy penetration into the power grid, due to the power generation characteristics of new energy, resulting in the stability of the power grid, it is urgent to solve this problem. This paper describes and explains the structure, working principle and control method of the grid type energy storage converter and the grid type energy storage converter for new energy generation, and analyzes the control model establishment and control strategy optimization of the two at home and abroad. Compare the advantages and disadvantages of grid following energy storage converters and grid forming energy storage converters, and the hybrid energy storage converter is proposed. A simple model is established using PSD-BPA to analyze the advantages of the hybrid energy storage converter and the role played by the grid type and the grid type converter. The future development direction of the energy storage converter is pointed out. © 2023 IEEE.

关键词： Energy storage

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A Novel Direct power control Strategy for Three-Level PWM Rectifier Based on Fized Synthesizing Vectors

A Novel Direct Power Control Strategy for Three-Level PWM Re...

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11th International Conference on Electrical Machines and systems(第11届国际电机与系统会议)

作者： Ting Lu Yongchang Zhang Yingchao Zhang Zhengming Zhao Liqiang Yuan State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department o State Key Laboratory of Control and Simulation of Power System and Generation EquipmentDepartment of

A novel direct power control (DPC) strategy for three-level neutral-point-clamped (NPC) pulse-width-modulation (PWM) rectifier, based on fixed synthesizing vectors, is proposed in this paper. The strategy breaks through the restrictions of vector switching with a simple switching table, improves the excellent dynamic performance of DPC, avoids the neutral-point voltage unbalance and the excessive voltage jumps in phase and line-to-line voltages of the rectifier, and guarantees the proper minimum pulse width and switching intervals between switches in different phases simultaneously. Experimental results verify the validity and feasibility of the proposed scheme.

关键词： Pulse width modulation power control Rectifiers Space vector pulse width modulation Switches Thyristors Topology Voltage control Snubbers control system synthesis

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Analysis of Coordinated control Strategy for Large-scale Renewable Energy VSCHVDC Integration

Analysis of Coordinated Control Strategy for Large-scale Ren...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Yan, Li Zhibin, Wang Yongning, Chi Chunxia, Wei Hongzhi, Liu Haiyan, Tang China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China

ISBN: (纸本)9781728135205

When a large-scale renewable energy source is connected to a VSC-HVDC grid and the VSC-HVDC system is used for long-distance transmission, the operational characteristics of the renewable energy and the VSC-HVDC grid will affect each other. The adaptability of the renewable energy to the VSC-HVDC grid will become an important factor affecting the operation of the grid. China has built the Nanao three-terminal VSC-HVDC project, the Zhoushan five-terminal VSC-HVDC project, and the two- terminal of the Xiamen VSC-HVDC project. Breakthroughs have been made in the impact of AC/DC system interconnection and key equipment technologies for VSC-HVDC transmission systems, especially VSC-HVDC converters and control protection technology. This paper focuses on the two main problems with renewable energy island integration. The first problem is how the VSC-HVDC grid provides a stable AC voltage to the renewable energy source without AC grid support. The second issue is how to maintain the energy balance of the VSC-HVDC system in the event of a fault. When the receiving end fails, the power energy cannot be sent out. When the sending end fails, the energy will accumulate in the VSC-HVDC grid. The resulting overvoltage and overcurrent problems require new control protection technology to will be introduced in this paper. © 2019 IEEE.

关键词： Renewable energy resources

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Coordinative control strategy of virtual inertia and primary frequency of DFIGs based wind farms

Coordinative control strategy of virtual inertia and primary...

引用

2016 IEEE PES Asia Pacific power and Energy Engineering Conference, APPEEC 2016

作者： Tian, Xinshou Wang, Weisheng Yan, Li Tang, Haiyan Chi, Yongning Wang, Yukun Zhen, Wang State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing100192 China

ISBN: (纸本)9781509054183

The mechanical parts of doubly fed induction generators (DFIGs) is decoupled from electrical parts, which makes the output active power hard to respond the frequency change of power grid, it becomes a new challenge to frequency stability of power grid with large scale wind power grid integration. A coordinative control strategy of virtual inertia and primary frequency of DFIGs based wind farms is given, and its principle is analyzed in the paper. The primary frequency control is a slow process, which is mainly implemented by control level of DFIGs based wind farms, and the DFIGs is cooperative. The virtual inertia control is a fast process, which is only implemented by control level of DFIGs. The theoretical analysis and time domain simulation show that the proposed control strategy can guarantee the frequency stability of power grid with large scale wind power integration. © 2016 IEEE.

关键词： Wind farm

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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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Analysis of the influence of wind farms in full operating conditions on the torsional vibration of the shaft system of synchronous generators

Analysis of the influence of wind farms in full operating co...

引用

2021 International Conference on power System Technology, powerCON 2021

作者： Jia, Qi Zhai, Wenchao Zhang, Qiang Sun, Feng Shen, Mohan Research Institute State Grid Liaoning Electric Power Shenyang China Northeast Electric Power University Min. of Educ. Key Laboratory of Modern Power System Simulation Control and Green Power Technology Jilin China

ISBN: (纸本)9781665407373

The power oscillation induced by the large-scale integration of wind power into the power grid has become one of the important issues affecting the safe and stable operation of the power grid. Aiming at the dynamic interaction between wind farms and synchronous generators, based on the additional excitation signal injection method, the influence of DFIG and PMSG wind farms on the damping characteristics of each torsional vibration mode of synchronous generators under full operating conditions is analyzed. By applying an AC voltage signal at both ends of the field winding to stimulate rotational speed oscillation, observe the difference in the free response characteristics of rotational speed disturbances, identify the electromechanical coupling characteristics between the wind farm and the synchronous generator set, and reveal the influence of the wind farm type and operating conditions on the shaft system of the synchronous generator set. The mechanism of torsional vibration. Finally, the validity of the theoretical analysis is verified based on time-domain simulation. © 2021 IEEE.

关键词： Synchronous generators

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Requirement Analysis on Large-scale Renewable Energy DC Collection and Transmission Technology 4

Requirement Analysis on Large-scale Renewable Energy DC Coll...

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4th International Conference on HVDC, HVDC 2020

作者： Li, Yan Liu, Hongzhi Chi, Yongning Fan, Xiaojie Tian, Xinshou Zhang, Zhankui China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China

ISBN: (纸本)9781728175935

Networking and integrated transmission of large-scale wind power bases are the key technical links for large-scale wind power bases to connect to the power grid. If the DC pooling scheme is adopted, there will be no reactive power consumption in the wind farm, and the power flow will depend on the DC voltage distribution of the DC pooling network. There is an essential difference between the operation control strategy and the AC pooling, which will solve the reactive voltage stability of the wind farm, and reduce wind farm construction and operating costs, improving operational efficiency. DC aggregation network technology is not only a concern of DC technical workers, but also a problem that other large inland wind farms and offshore wind farms need to study. It can be seen that the research on the DC networking technology scheme of large-scale renewable energy power generation will have guiding significance for the development and utilization of renewable energy power generation in the power grid, promote the healthy development of renewable energy power generation and related industries, and be friendly to the construction of a strong smart grid, provides good technical support. © 2020 IEEE.

关键词： Operating costs

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Rapid power system operation risk assessment considering the correlation of wind generation 1

Rapid power system operation risk assessment considering the...

引用

1st IEEE China International Youth Conference on Electrical Engineering, CIYCEE 2020

作者： Bai, Jie Wang, Jing China Electric Power Research Institutes State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems Beijing100192 China

ISBN: (纸本)9781728196596

With the increasing penetration of wind power generation, the operation reliability of the power system would be significantly impacted due to the uncertainty and volatility of wind generation. Therefore, this paper proposes a method of rapid power system operation risk assessment considering the correlation of wind generation. Firstly, a wind power scenario-constructing approach is presented. The proposed approach employs the Latin hypercube sampling to construct wind power generation scenarios while considering the correlation of wind generation. Then, the risk-oriented benefit function is adopted to evaluate the risk indices of the constructed scenarios. In order to improve the computation performance, a searching method based on the steady-state security region is applied to avoid redundant calculation of a large number of secure scenarios. The method is validated on a modified IEEE 30-bus system, and the simulation results verify that the proposed method is feasible and applicable. The computational performance of the method is also examined. © 2020 IEEE.

关键词： Wind power

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Dynamic Behavior of Suspended Bubbles in Insulating Oil Correlation with Flow Field Distribution 4th

Dynamic Behavior of Suspended Bubbles in Insulating Oil Corr...

引用

4th International Symposium on Insulation and Discharge Computation for power Equipment, IDCOMPU 2023

作者： Zhang, Ning Hao, Jian Liu, Shili Zhang, Junyi Chen, Houhe Liao, Ruijin Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing400044 China

ISBN: (纸本)9789819974122

In recent years, arcing faults inside large oil-immersed power transformers have been frequent. Suspended bubbles, as the main product of high temperature, high humidity, material aging and cracking gas production inside transformers, are one of the main causes of arcing inside transformers. However, due to the complex structure of the oil channel and the large fluctuation of the internal flow field distribution, the resulting bubble morphology evolution and movement law is not clear. In this paper, the influence of the initial position of bubbles and the relative position between bubbles on the flow field distribution is fully considered, and the dynamic behavior of suspended bubbles in oil under two fluid forms of natural oil circulation and forced oil circulation is simulated and studied by combining laminar and turbulent flow models and bubble force control equations, and the correlation mechanism between suspended bubbles and flow field distribution characteristics is analyzed. The simulation results show that the flow field in the laminar state affects the bubble aggregation and trajectory, while the turbulent state affects the bubble distortion and motion time, and a reasonable model in the simulation of bubble dynamic behavior is more beneficial to improve the simulation accuracy. © Beijing Paike Culture Commu. Co., Ltd 2024.

关键词： Flow fields

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BUCK CONVERTER-BASED ERROR ANALYSIS OF L/C MODEL ALGORITHM IN REAL-TIME simulation 12

BUCK CONVERTER-BASED ERROR ANALYSIS OF L/C MODEL ALGORITHM I...

引用

12th International Conference on Renewable power Generation, RPG 2023

作者： Ji, Wanyu Tu, Yiming Zhang, Xiaolin Dong, Wei State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing100192 China

Hardware-in-the-loop real-time simulation has been increasingly applied for renewable power generation and grid-integration analysis with the involvement of power electronic converters. In this paper, based on a Buck converter, both time- and frequency-domain errors in real-time simulation applying L/C switching model algorithm are analysed. L/C model-based algorithm deal with the power electronic switch as a constant conductance in parallel with a changing current source, through which the simulation duration is essentially decreased compared to the traditional binary resistance (i.e., Ron/Roff) model. However, through L/C model algorithm, the original topology is modified and the transient switching loss is increased. Based on the Buck converter, this paper first analyses the power loss and the steady-state output deviation between the two simulation algorithms. Then, the output impedance of Buck circuit realized in the L/C model algorithm is established for the first time, which presents evidently deviations in low-frequency area compared to the theoretical small-signal linearizing model. Finally, the simulated steady-state output voltage and frequency-scanned output impedance verify the theoretical analyses. © The Institution of Engineering & Technology 2023.

关键词： Topology

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