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检索条件"机构=State Key Laboratory for Control and Simulation of Power System and Generation Equipment"

共 1023 条记录，以下是141-150 订阅

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Overvoltage Suppression Strategy Based on Active control of Current for Half-Wave Commutated Modular Multilevel Converters

Overvoltage Suppression Strategy Based on Active Control of ...

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IEEE International Conference on power and Energy systems (ICPES)

作者： Bao Liu Yunfei Xu Guoliang Zhao Nan Fu Chen Jia State Key Laboratory of Advanced Power Transmission Technology China Electric Power Research Institute Beijing China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China Electric Power Research Institute of State Grid Liaoning Electric Power Co. Ltd. Shenyang China

ISBN: (数字)9798350391329

ISBN: (纸本)9798350391336

Flexible low-frequency AC transmission technology combines the advantages of 50 Hz AC transmission and DC transmission, and has good application scenarios. High voltage and large capacity AC/AC converters are the core equipment of flexible low-frequency AC transmission systems. The proposal of half-wave commutated modular multilevel converters effectively reduces the number of components and improves system economy. In view of this, this paper proposes an overvoltage suppression strategy for active control of inductor current, which effectively reduces the overvoltage level during commutation. The article first introduces the sparse topology and mathematical model of the half-wave commutated modular multilevel converters. Secondly, the mechanism of overvoltage generation is analyzed. Then, overvoltage suppression strategies are proposed. Finally, a PSCAD simulation model is built to verify the effectiveness and feasibility of the proposed method through simulation.

关键词： Multilevel converters Reactive power Bridge circuits Valves Mathematical models Topology Safety Voltage control Inductors PSCAD

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Pre-configuration Method and Scheduling Strategy of Distribution Network Mobile Energy Storage Vehicle Considering Intermittent Load of Rural Network

Pre-configuration Method and Scheduling Strategy of Distribu...

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2024 International Conference on Electronics and Devices, Computational Science, ICEDCS 2024

作者： Lu, Xiaoming Yao, Yiwen Xin, Yechen Wang, Dingheng Wang, Xinhong Xu, Xin Li, Hao State Grid Jilin Electric Power Co. Ltd Economic and Technological Research Institute Changchun China Ministry of Education Northeast Electric Power University Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Jilin China State Grid Jilin Electric Power Co. Ltd Changchun China

ISBN: (纸本)9798331527624

Aiming at the problem of heavy overload in the distribution station area during the peak period of energy consumption caused by intermittent loads such as agricultural motor wells, the mobile energy storage technology is considered to meet the agricultural power demand, and a two-stage mobile energy storage vehicle pre configuration and dynamic adjustment strategy of "Rural busy power energization"and "rural idle distributed energy storage"is proposed, taking into account the guarantee of load power demand and the efficiency and economy of energy storage. Firstly, the mathematical model of agricultural motor well load considering the time shift characteristics and the mobile energy storage vehicle model considering the power supply time constraint are established;Secondly, a multi-stage mobile energy storage configuration and scheduling strategy is established. In the Rural busy power generation stage, the mobile energy storage vehicle capacity is configured with the minimum daily power supply cost as the goal, and the power supply path is optimized with the highest charge state consistency at the completion of power supply as the goal;At the stage of distributed energy storage in rural slack, the collaborative optimization of mobile energy storage vehicles participating in multi scenario power services is carried out with the goal of maximizing the annual net income. Finally, the proposed two-stage strategy has certain economic benefits under the premise of meeting the power demand of the load, which is verified by combining the power consumption data of wells in Jilin Province and IEEE 33 bus system simulation. © 2024 IEEE.

关键词： Charge storage

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Clustering and Equivalent Modeling Method for Direct-Drive Wind Farms Based on Particle Swarm Neural Network 4

Clustering and Equivalent Modeling Method for Direct-Drive W...

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4th International Conference on Energy, power and Electrical Engineering, EPEE 2024

作者： Tu, Liang Huang, Libin Guo, Haiping Hu, Binjiang Zhang, Jingyue Luo, Hui State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&d Centre China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System China Southern Power Grid Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&d Centre Guangzhou China

ISBN: (纸本)9798331518066

In the realm of large-scale integration of wind farms or clusters into power grids, the fault transient characteristics of these grids have experienced significant transformations. Unfortunately, the prevalent single-machine equivalent models are inadequate in accurately depicting the fault transient behavior of wind farms or clusters. Moreover, their simulation computations are exceedingly intensive, resulting in suboptimal simulation efficiency. To address these challenges, this paper introduces a clustering and equivalent modeling approach tailored for direct-drive wind farms, leveraging the capabilities of a particle swarm neural network. Initially, a transient model for direct-drive wind turbines is formulated, and fault characteristic influence factors are established through theoretical analysis. These factors encompass the distance between the wind turbine and the point of common coupling (PCC), the implementation of DC-side current limiting measures, wind speed, and reactive power at the outlet. Following this, the Euclidean distance of the influence factor set is computed, and the initial cluster centers of wind turbines are derived using an enhanced max-min distance method. Ultimately, an equivalent clustering model is formulated by utilizing the influence factors and initial cluster centers as the training set. simulation outcomes reveal that, in comparison to the single-machine equivalent model, this method enhances simulation efficiency by a range of 62% to 67% and reduces the steady-state error in fault current simulation by 0.8% to 1.9%. © 2024 IEEE.

关键词： Windmill

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A method for measuring the potential near the ground under a high-voltage transmission line

A method for measuring the potential near the ground under a...

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2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022

作者： Shuai, Yang Bo, Yang Luwen, Xu Jun, Zou Tsinghua University State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Beijing100084 China State Grid Chongqing Electric Power Research Institute Chongqing401123 China

ISBN: (数字)9781665407502

ISBN: (纸本)9781665407502

With the development of the power grid and the continuous construction of high-voltage transmission lines, the impact of high-voltage transmission lines in the nearby residential areas is increasingly concerned. Based on the mechanism of induction power generation, according to the relationship between voltage and electric field, this paper proposed an inductive electrical measurement method in the near-ground area under high-voltage transmission line. In this paper, the proposed method is verified by COMSOL simulation software. The simulation results show the effectiveness of the method proposed in this paper. The induced voltage measurement method in the near-ground area proposed in this paper can be applied to the evaluation of induced electricity and electromagnetic environmental protection. © 2022 IEEE.

关键词： Electric fields

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Transverse negative current fault location and protection for dual-circuit outgoing lines of inverter-based source

Transverse negative current fault location and protection fo...

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18th International Conference on Developments in power system Protection (DPSP APAC 2025)

作者： Bo-Liang Jin Yi-Shen Wang Minghao Huyang Xin-Zhou Dong State Key Laboratory of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing People's Republic of China

ISBN: (数字)9781837242900

To enhance power system reliability and ensure the safety of substations, the utilization of dual-circuit outgoing lines in engineering projects is common for inverter-based power sources like photovoltaic power stations and direct-drive wind turbines. The fault characteristics of these dual-circuit lines differ significantly from those of single-line configurations. In the case of single-line, the fault current on the substation side is typically limited and contain minimal negative-sequence component due to the control mechanisms of the station's inverter. Conversely, in dual-circuit line, a fault occurrence in one line allows for the flow of considerable short-circuit currents and negative-sequence currents through the parallel non-faulty line in reverse direction. In order to tackle this issue, this paper proposes a novel principle for fault location based on transverse negative-sequence currents, specifically designed for dual-circuit outgoing lines of inverter-based power sources. This principle takes advantage of the negative-sequence current suppression inherent in inverters and achieves fault distance measurement by evaluating the relative ratio of negative-sequence currents in both lines. Building upon this theoretical foundation, a corresponding transverse fault protection scheme based on negative-sequence currents is presented. Experimental results validate the effectiveness of this scheme, demonstrating its capability to accurately identify both internal and external asymmetrical faults while remaining immune to fault transition resistances.

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Research on the Equilibrium Model of Electrical Energy and Flexible Ramping Market Considering Ramp Capacity Demand Curve

Research on the Equilibrium Model of Electrical Energy and F...

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2024 International Conference on Electrical power systems and Intelligent control, EPSIC 2024

作者： Sun, Tian Ji, Peng Xing, Tong Li, Wenxuan Guo, Zhuochen Beijing Power Exchange Centre Co. Ltd State Key Laboratory of Power System and Generation Equipment Dept. of Electrical Engineering Tsinghua University Beijing China Beijing Power Exchange Centre Co. Ltd Beijing China Sichuan Energy Internet Research Institute Tsinghua University Chengdu China

ISBN: (纸本)9798350366075

As the proportion of renewable energy in the power system increases, the intermittence, variability and uncertainty of its power generation will bring greater operating pressure to the power system, requiring certain flexible adjustment and response capabilities to cope with intermittency. Potential situations such as wind curtailment, light curtailment, and load loss brought about by renewable energy have placed higher requirements on system flexibility. Taking into account the current situation that China's power system flexibility needs to be improved urgently in the context of the new power system, this article first provides an overview of the basic concepts and other aspects of the flexible ramping market mechanism;Secondly, on the basis of considering the calculation of the ramp capacity demand curve, an electricity energy flexible ramping market equilibrium model was constructed to support the decision-making of reasonable capacity allocation among flexible resources in different markets. Finally, simulation was performed on the IEEE 30-bus system to verify the feasibility and effectiveness of the proposed method. ©2024 IEEE.

关键词： flexible ramping market equilibrium new power system ramp capacity demand curve

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A novel non-pilot distance protection scheme for asymmetric short-circuit faults of transmission line with converters at both ends

A novel non-pilot distance protection scheme for asymmetric ...

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18th International Conference on Developments in power system Protection (DPSP APAC 2025)

作者： Minghao Huyang Yishen Wang Bo-liang Jin Haonan Wang Binshu Chen Xinzhou Dong State Key Laboratory of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing People's Republic of China

ISBN: (数字)9781837242900

Both the renewable energy power station and the flexible DC converter are inverter-based power sources, where the output current's magnitude and phase are controlled, exhibiting weak feeding characteristics. In the line with converters at both ends, distance protection at both ends fails to operate correctly. This paper analysed the composite sequence network of asymmetric short-circuit faults in line with converters at both ends, and proposes a distance protection scheme immune to transition resistance, capable of accurately measuring the fault distance. By utilizing the changes in electrical quantities after the breaker trips at one end, a non-pilot protection scheme that does not rely on communication is introduced. This protection scheme uses different principles at both ends of line with converters at both ends. simulation results show that the proposed protection can accurately identify asymmetric short-circuit faults in line with converters at both ends and can effectively and rapidly protect both the flexible DC converter and the renewable energy power station.

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Active Support Performance Test of Grid-connected Photovoltaic system Based on Grid-forming control 3

Active Support Performance Test of Grid-connected Photovolta...

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3rd International Conference on Intelligent power and systems, ICIPS 2023

作者： Xi, Xinze Hu, Yun Xing, Chao Guo, Qi Xu, Shoudong Tu, Liang He, Peng Zhu, Yihua Su, Mingzhang Luo, Chao Yunnan Electric Power Research Institute Kunming China National Energy Power Grid Technology R&D Centre Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute CSG Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350328691

With the continuous increase penetration of new energy, the integration of grid-following (GFL) converter is prone to frequency stability issue, while the utilization of grid-forming (GFM) converter with active support capability has become an inevitable trend in development. In this paper, the model of grid-connected photovoltaic system using GFL/GFM control is established. The support characteristic of GFM is compared and analyzed in different testing scenarios with GFL as the reference: (1) Small disturbance test (2) Large disturbance test (3) Island capability test. Finally, the active support performance of the system is quantitatively analyzed based on corresponding evaluation indexes. ©2023 IEEE.

关键词： power converters

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Research on Optimal Dispatching of Multi-energy Complementary system with Deep Peak Regulation 23

Research on Optimal Dispatching of Multi-energy Complementar...

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7th International Conference on High Performance Compilation, Computing and Communications, HP3C 2023

作者： Ma, Yuhan Ding, Shuo Ge, Xiaohui Zhao, Bo An, Yining State Grid Zhejiang Electric Power Co. Ltd. Research Institute Zhejiang Hangzhou China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Northeast Electric Power University Jilin Jilin China

ISBN: (纸本)9781450399883

The networked operation of multiple energy sources is gradually becoming the direction of future power system development. The optimal scheduling of the multi-energy network system is an important means to cope with the consumption of large-scale new energy connected to the grid. The cost model of wind power-photovoltaic-hydropower-thermal power-pumped storage combined generation system considering the depth peak regulation cost of thermal power units and the day-ahead optimal scheduling model of wind power-photovoltaic-hydropower-thermal power-pumped storage combined generation system considering the peak regulation initiative is established. A hierarchical optimal scheduling model is proposed to improve the absorption capacity of renewable energy and optimize the economic operation of thermal power units, to minimize the peak regulation cost and the amount of wind power abandonment of the system. The simulation examples show that the proposed model can realize the complementary operation of the combined power generation system, improve the depth peak regulation capacity of the thermal power units, and reduce the new energy abandonment rate and the system operation cost. © 2023 ACM.

关键词： Wind power

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simulation Research on Primary Frequency Regulation Coordination control Strategy of Hybrid Wind-PV-ES power Station Based on AGC 12

Simulation Research on Primary Frequency Regulation Coordina...

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12th Annual Meeting of CSEE Study Committee of HVDC and power Electronics, HVDC 2023

作者： Li, Shengnan Hu, Yun He, Xin Zhu, Yihua He, Tingyi Luo, Chao Deng, Can Zeng, Guanming Su, Mingzhang Yunnan Electric Power Research Institute Kunming China National Energy Power Grid Technology R&D Centre Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute CSG Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power GridGuangzhou China

ISBN: (纸本)9781839539848

With the increase of wind and solar renewable energy penetration in power system, the frequency control ability of power system completely depending on traditional power supply has weakened. This actuality requires that renewable energy stations should be equipped with a certain amount of energy storage to improve the primary frequency control ability. This paper considers the fast response ability and flexible control of energy storage for both charging and discharging, as well as its unique frequency response characteristics. Firstly, the control characteristics of the primary frequency regulation of the hybrid wind-solar-storage power station(Wind-PV-ES) are analyzed. By improving the automatic generation control(AGC) strategy of the hybrid Wind-PV-ES power station, a coordinated control strategy for the primary frequency regulation of the hybrid Wind-PV-ES power station is proposed for different frequency ranges based on the improved AGC control. After the primary frequency regulation action, the energy storage output is given priority control before wind and solar. When the energy storage active margin is insufficient, use the frequency regulation capacity of wind and photovoltaic power system to improve the primary frequency regulation capacity of the hybrid Wind-PV-ES power station. The control strategy proposed in this paper can improve the primary frequency regulation capability of renewable energy station. Finally, the paper verifies the effectiveness of the proposed control strategy through simulation. © The Institution of Engineering & Technology 2023.

关键词： Energy storage

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