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检索条件"机构=State Key Laboratory ofSmart Grid Protection and Control"

共 401 条记录，以下是131-140 订阅

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Simulation and Verification of Sub-synchronous Oscillation from Impedance Perspective-Taking a Wind Power Base in China as an Example 6th

Simulation and Verification of Sub-synchronous Oscillation f...

引用

6th PURPLE MOUNTAIN FORUM on Smart grid protection and control, PMF2021

作者： Xu, Guang Zhu, Ling Li, Jianhua Huang, Zhiguang Li, Zhaowei Hou, Yuqiang NARI Technology Co. Ltd Jiangsu Nanjing211106 China East China Grid Co. Ltd Shanghai200120 China State Key Laboratory of Smart Grid Protection and Control Jiangsu Nanjing211106 China

ISBN: (纸本)9789811671555

Recently, numerous sub-synchronous oscillations (SSO) events have occurred in many wind farms in China, which seriously threatened the power system security and stability. It is generally believed that the LC resonance between the wind farm side and the grid side with series compensation (SC) devices is one of the conditions that cause the SSO. This paper takes a real power grid as an example, reappeared the SSO events through electromagnetic simulation, analyzed the key influence factors, and proposes a strategy from impedance perspective in the end based on reasonable assumptions, in order to suppress the SSO shortly after the oscillations happened. Firstly, make off-line impedance analysis based on the deterministic grid structure, and then give the sensitivity results of each wind farm to the SSO. Finally, cut off the wind farm based on the sensitivity orders during the SSO. The simulation results were performed to verify the validity. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Electromagnetic simulation

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A quantitative evaluation method for the performance of primary frequency regulation of system resources

A quantitative evaluation method for the performance of prim...

引用

International Conference on Electronics Technology (ICET)

作者： Wu Xuelian Liu Fusuo Huang Hui Zhang Hongli Li Wei Power Grid Analysis and Consulting Department NARI Group Corporation/State Grid Electric Power Research Institute Nanjing China State Key Laboratory of Smart Grid Protection and control NARI Group Corporation/ State Grid Electric Power Research Institute Nanjing China

ISBN: (数字)9798350363951

ISBN: (纸本)9798350363968

With large scale new energy power being connected to the grid, the frequency support capability of the system decreases gradually. In order to meet the regulation requirements of system frequency stability and lay the foundation for frequency stability coordination and optimization control, it is necessary to use reasonable quantitative evaluation indicators for primary frequency regulation performance. Firstly, the dynamic response characteristics of frequency modulation resources in load fluctuation scenarios and large power disturbance scenarios are analyzed separately. Then, by mastering the frequency response characteristics of the system considering primary frequency regulation in different scenarios, the key factors affecting the safety and stability characteristics of the system frequency are determined. Finally, a quantitative evaluation method for the primary frequency regulation performance of frequency modulation resources is proposed, and the applicability of the proposed evaluation method is verified based on typical scenario examples.

关键词： Performance evaluation Frequency modulation Power system dynamics Power system stability Stability analysis Regulation Power grids

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Research on Hybrid Active Power Filter and Its control and protection System for LCC-HVDC

Research on Hybrid Active Power Filter and Its Control and P...

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IEEE Joint International Information Technology and Artificial Intelligence Conference (ITAIC)

作者： Wujie Chao Liyu Dai Junwei Huang Mingquan Chen State Grid Fujian Electric Power Research Institute Fuzhou China Fujian Key Laboratory of Protection and Operation Control for Smart Grid Fuzhou China

Filters are key equipment in LCC-HVDC projects. It filters out characteristic harmonics generated by the converter and prevents the effect of harmonics generated by converters on the AC power grid. Currently, most DC transmission projects use passive filters. The first use of hybrid active power filters in the Fujian Guangdong DC interconnection project º This paper introduces the application framework, theory, control and protection system design of hybrid active power filters in LCC-HVDC projects.

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Evaluation Methods for the Degree of Interaction and Coupling between New Energy and DC

Evaluation Methods for the Degree of Interaction and Couplin...

引用

International Conference on Electronics Technology (ICET)

作者： Wu Xuelian Liu Fusuo Li Zhaowei Zhang Hongli Lai Yening Power Grid Analysis and Consulting Department NARI Group Corporation/State grid electric power research institute Nanjing China State Key Laboratory of Smart Grid Protection and control NARI Group Corporation/ State grid electric power research institute Nanjing China

ISBN: (数字)9798350363951

ISBN: (纸本)9798350363968

The high proportion of new energy connected to multi-infeed direct current power system may cause large-scale new energy to enter low voltage ride-through and multiple DC commutation failures under severe grounding faults, and the interactive coupling effect may affect the subsequent recovery process. In response to this phenomenon, interactive indicators are proposed to evaluate the risk of simultaneous faults between DC and new energy during grounding faults, as well as coupling indicators to evaluate the risk of secondary faults during the recovery process of DC and new energy after grounding faults are cleared. Simulation analysis based on actual power grids shows that this indicator can evaluate the interactive coupling process between new energy low voltage ride-through and DC commutation failure intuitively.

关键词： Couplings Low voltage Time-frequency analysis Grounding Electric shock Voltage Power system stability

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A Coupled RTK/INS Positioning Method Based on Robust Estimation

A Coupled RTK/INS Positioning Method Based on Robust Estimat...

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第十四届中国卫星导航年会

作者： Huizhen Yu Xianliang Teng Shuguo Pan Min Zhang Jian Shen Wang Gao School of Instrument Science and Engineering Southeast University State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation

In the urban environment,the positioning results of RTK/INS integrated navigation are often influenced by grosses,which degrades the positioning accuracy and damages the stability of the navigation *** solve this dilemma,a loose coupled RTK/INS positioning method based on robust estimation is ***,during RTK positioning,for eliminating corrupted measurements caused by Non-Line-of-Sight(NLOS) signals and multipath,this paper researches the RTK positioning algorithm based on bifactor robust *** this method,the ambiguity is fixed and solved back into the Double-Difference(DD) equation in least square *** posterior residual vector is used for the bifactor robust processing to eliminate the influence of some abnormal ***,the RTK positioning results are loosely integrated with Inertial Navigation System(INS),and the robust processing based on Huber equivalent weight function is implemented in the process of the Kalman filter ***,the proposed algorithm is validated by vehicle data in a typical urban *** experimental results show that compared with the traditional least squares-based RTK,the accuracy of the bifactor RTK method is improved by 2.48 cm in the horizontal ***,in contrast with the RTK/INS method based on the single robust processing,the accuracy of the proposed robust bifactor error method in the horizontal direction is increased by 3.85 *** navigation accuracy and reliability are significantly *** dynamic environment,this research has certain theoretical reference and practical value for vehicular and autonomous driving applications.

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Reliability Assessment of Battery Energy-Storage Module Based on Correlation Analysis 7

Reliability Assessment of Battery Energy-Storage Module Base...

引用

7th Asia Conference on Power and Electrical Engineering, ACPEE 2022

作者： Xiong, Jiali Cai, Qiang Dai, Liyu Li, Zhicheng Lin, Guodong Deng, Chaoping Sun, Jin Electric Power Research Institute State Grid Fujian Electric Power Co. Ltd Fujian Key Laboratory of Protection and Operation Control for Smart Grid Fuzhou China Fuzhou University College of Electrical Engineering and Automation Fuzhou China

ISBN: (纸本)9781665418195

The battery energy storage technology can be flexibly configured and has excellent comprehensive characteristics. In addition to considering the reliability of the battery energy storage power station when it is connected to the grid, the reliability of the energy storage power station itself should also be considered. The reliability model based on Copula theory was established for battery module, and the reliability of energy storage module was analyzed according to the basic structure of energy storage modules. In this paper, the example analysis is based on the existing simulation model of energy storage module. Then the reliability of energy storage module in the next 20 years is predicted considering the different correlations between battery clusters. © 2022 IEEE.

关键词： Reliability analysis

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Analysis of Ultra-low Frequency Oscillation Stability of Power Systems

Analysis of Ultra-low Frequency Oscillation Stability of Pow...

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International Conference on Power and Energy Technology (ICPET)

作者： Kesu Cai Dongsheng Liu Wenshuo Zhao Xi Hong Yao Yin Xuanqu Fei State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation State Grid Electric Power Research Institute NanJing China School of Electrical Engineering and Electronic Information Xihua University Chengdu China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

The Low-Frequency Oscillation (LFO), Ultra-Low Frequency Oscillation (ULFO) and other oscillation can endanger the safety and stability operation of the power grid. However current relevant standards only have clear provisions on the critical damping ratio of LFO. Based on the risk of ULFO in high proportion hydropower systems, the principle and key influencing factors of ULFO are derived theoretically. According to the characteristics and hazards of ULFO, a method for determining the critical damping ratio of ULFO is explored, and the effectiveness of the method is tested through the actual response trajectory.

关键词： Damping Stability criteria Hydroelectric power generation Power system stability Attenuation Power grids Hazards Trajectory Oscillators Standards

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A Method for Measuring Capacitive Current in Arc Suppression Coil Grounding System 2

A Method for Measuring Capacitive Current in Arc Suppression...

引用

2022 2nd International Conference on Energy, Power and Advanced Thermodynamic Systems, EPATS 2022

作者： Xia, Lei Wu, Hai Hu, Guo Hu, Song Nari Group Corporation State Key Laboratory of Smart Grid Protection and Control Jiangsu Nanjing211106 China NARI Technology Development Co. Ltd. Jiangsu Nanjing211106 China

With the rapid development of the national economy, the system cabling rate continues to improve, the system capacitive current continues to increase, and the arc suppression coil grounding method is more and more widely used. Among them, the pre adjustable turn adjustable arc suppression coil accounts for the highest proportion. How to accurately, quickly and real-time measure and calculate the capacitive current of the system is the foundation to realize the automatic tracking and compensation of the arc suppression coil, It is also the key to reliably extinguish the arc and reduce the influence range of the fault when the single-phase grounding fault occurs in the system. Based on the analysis of the variation law of the capacitive current in the distribution network neutral grounding system through the arc suppression coil, this paper proposes a new method for measuring the capacitive current based on the resonance point curve fitting, which is suitable for the pre adjustable turn adjustable arc suppression coil grounding system, and verifies its reliability and accuracy through simulation. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Curve fitting

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Optimal Scheduling of Thermoelectricity in Integrated Energy System Based on Waste Heat Recovery from Power to Gas and Flexible Thermoelectricity Ratio 6

Optimal Scheduling of Thermoelectricity in Integrated Energy...

引用

6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Yang, Dongmei Gao, Yu Wang, Qi Chen, Yan Guo, Yuchen Wang, Meng Nari Technology Co. Ltd. The State Key Laboratory of Smart Grid Protection and Operation Control Nanjing China Nanjing Normal University School of Nari Electric and Automation Nanjing China

ISBN: (纸本)9798350347159

Aiming at the anti-peak shaving characteristics of wind power and the problem of wind curtailment caused by the 'fixing electricity by heat' of CHP units, an optimal scheduling method in integrated energy systems based on waste heat recovery from power to gas(P2G) and flexible thermoelectricity ratio in CHP is proposed. First, the P2G energy coupling mechanism and the feasibility of P2G waste heat recovery and utilization are analyzed. P2G equipment is introduced into the system and the remaining heat is recycled and utilized to promote wind power grid-connected consumption. Then, the principle of flexible thermoelectric ratio adjustment of CHP is analyzed, so that CHP can adjust the thermoelectric ratio following the trend of wind power output and the energy supply pressure of electric heat load, so as to improve the wind power consumption capacity of the system. Finally, the optimal scheduling model of the integrated energy system is constructed with the goal of minimizing the daily operating cost. The simulation example shows that the proposed scheduling method optimizes the thermoelectric coupling relationship of the system, effectively improves the wind power absorption capacity of the system, and has good social and economic benefits. © 2022 IEEE.

关键词： Wind power

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Real-Time Transaction Prediction Method Based on Generalized Tie-Line 1

引用

International Top-Level Forum on Engineering Science and Technology Development Strategy and 5th PURPLE MOUNTAIN FORUM on Smart grid protection and control, PMF2020

作者： Zhang, Yantao Jiang, Jingxiao Tu, Mengfu Xu, Fan Wang, Wen Nanjing Jiangsu211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing Jiangsu211106 China

ISBN: (数字)9789811597466

ISBN: (纸本)9789811597459

In order to cope with the rapid development of renewable energy in the Northwest Power grid, it is an urgent need to predict the renewable energy consumption capacity and transaction needs of the provinces, and promote the timely consumption of renewable energy within and between provinces. Therefore, this paper proposes a real-time transaction prediction method based on the generalized tie-line. Based on the definition of generalized tie lines, a multi-objective optimization model is established. The optimization objectives include positive and negative reserve of the provincial power grid and generalized positive and negative reserve of the main and sub-control areas. The method analyzes the power transmission and reception capacity and power transmission and reception needs of the main and sub-control areas in the next few hours, calculates the power purchase and sales capacity among the provinces, and automatically generates intra-provincial replacement and inter-provincial transaction plan based on the transaction rule library to enhance the intelligence level of renewable energy consumption in the Northwest Power grid. © 2021, Springer Nature Singapore Pte Ltd.

关键词： Forecasting

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