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IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia)

作者： Fan Xu Rongzhang Cao Mengfu Tu Yantao Zhang Leyong Yang Dandan Zhang State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Nanjing China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143040

The HVDC transmission schedule for clean energy seldom considers the demand of receiving grid. With the expansion of clean energy scale, it brings great pressure to the receiving grid for safe and stable operation. For this reason, a generation and transmission scheduling model of inter-regional HVDC tie-line system considering conditional section is proposed. A step power adjustment model for the HVDC tie-line operation optimization is developed with consideration given to various constraints on tie-line power, which not only give full play to the characteristics of HVDC tie-line that can be flexibly adjusted, but also avoid the frequent conversion of HVDC converter equipment, making the HVDC tie-line schedule more executable. The joint operation model of cascaded hydropower plants in sending grid is established to meet the operational constraints such as the restricted operating zones of hydropower units, and to ensure the priority of clean hydropower resources and the practicability of the hydropower schedule. The model of conditional control section is established, which can effectively deal with the problem of the coupling between the power limits of section and the number of running units, so as to ensure the safe and stable operation of related sections. Based on the actual data of a cross-regional interconnected power grid, the validity of the model is verified, which can promote the accommodation of clean energy across a wide range of regions, reduce the supply cost of large power system, and alleviate the pressure of safe and stable operation at the receiving system.

关键词： Hydroelectric power generation HVDC transmission Schedules smart grids Dispatching Vibrations

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A Method to Prevent and control the Interruption Exception of Sampling in Merging Unit

A Method to Prevent and Control the Interruption Exception o...

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Sustainable Power and Energy Conference (iSPEC)

作者： Rui Cao Zhaohui He Tonghua Wu Bin Zhou Zhonglang Wang Xindong Li State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Nanjing China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

As the sampling interruption is the heartbeat of merging unit, its stability is directly related to the accuracy and discreteness of the output SV packets of merging unit. To prevent the output error from merging unit when its sampling interruption is abnormal, this paper proposes crystal frequency monitoring technology, sampling interruption monitoring technology and SV packets timing monitoring technology, forming the prevention and control system of sampling interruption exception of merging unit. The merging unit developed by above technology has the function of early warning and processing for the occasional sampling interruption exception, which improves the reliability of intelligent substation operation.

关键词： Substations Heart beat Merging Crystals Reliability engineering Synchronization Monitoring

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Study on the fault ride through control for AC-DC hybrid distribution network 16

Study on the fault ride through control for AC-DC hybrid dis...

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16th IET International Conference on AC and DC Power Transmission, ACDC 2020

作者： Zhou, Yongrong Lu, Yongcan Ge, Xuefeng Li, Dandong State Grid Electric Power Research Institute Co. Ltd. Jiangsu Province Nanjing China State Key Laboratory of Smart Grid Protection and Operational Control Jiangsu Province Nanjing China School of Power Electric Engineering Nanjing Institute of Technology Jiangsu Province Nanjing China Electric Power Research Institute State Grid Jiangsu Electric Power Co. Ltd Jiangsu Province Nanjing China

ISBN: (纸本)9781839533914

Fault ride through control is an important technology for an efficient operation of AC/DC hybrid distribution network with multiple distributed energies. In this paper, a fault ride through control with energy storage is proposed, in which extra super capacitors is installed on the dc side of the power electronic transformer. The coordinated control of the super capacitors is designed. Meanwhile, the volume calculation of super capacitor is discussed. Finally, a model is established in MATLAB/Simulink and simulations are carried out. The results verify that the low voltage ride through ability of AC/DC hybrid distribution network is enhanced, and the output voltage of the DC side is more stable, with the auxiliary super capacitor. © 2020 Institution of Engineering and Technology. All rights reserved.

关键词： Energy storage

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Study on the Corresponding Relationship Between Critical Points of P-V Curve and V-Q Curve of Simple Thevenin Equivalent System

Study on the Corresponding Relationship Between Critical Poi...

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Electrical Engineering (CIYCEE), IEEE China International Youth Conference on

作者： Xuan Li Zhaowei Li Linlin Guan Xuelian Wu Yan Mei Jun Li State Key Laboratory of Smart Grid Protection and Operation Control State Grid Electric Power Research Institute Nanjing China

ISBN: (数字)9781728196596

ISBN: (纸本)9781728196602

With the further increase in power demand for highly concentrated load centers and the gradual formation of a power system with a high proportion of new energy sources, China will face severe risk of voltage instability. In this paper, firstly, the load bus voltage equation of simple Thevenin equivalent system is derived, and then the P-V and V-Q curves are obtained respectively. Secondly, the mutual restriction relationship between active and reactive power of load is discussed when there is a real value solution to the voltage. Finally, the relationship between the voltage of critical points of the P-V curves and the reactive power of the load, and the relationship between the voltage of critical points of the V-Q curves and the active power of the load are deduced respectively. The relationship of one-to-one correspondence between critical points of P-V curves and critical points of V-Q curves is proved according to the mutual restriction between active power and reactive power of load and monotonicity of critical voltage and load power function.

关键词： Electrical engineering Reactive power Power demand Conferences Power system stability Faces

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High-performance Full Electromagnetic Transient Simulation System of Fujian Power grid and its Application

High-performance Full Electromagnetic Transient Simulation S...

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Zhicheng Li Zhijun Tang Dongyuan Zhang Wujie Chao Xiaoyan Peng Yongjie Leng Fujian Key Laboratory of Smart Grid Protection and Operation Control Electric Power Research Institute State Grid Fujian Electric Power Co. Ltd Fujian China Fujian Key Laboratory of Smart Grid Protection and Operation Control Electric Power Research Institute State Grid Fujian Electric Power Co. Ltd Fuzhou China Integrated Electronic Systems Lab Co. Ltd. Jinan China

ISBN: (纸本)9781665434263

This paper proposes a high-performance full electromagnetic transient simulation system of Fujian power grid. The system is developed based on the General Transient Simulator (GTS), which is a self-developed electromagnetic transient simulation tool. The key technologies of the simulation system, such as the high-performance automatic parallel computing technology and the large time step electromagnetic transient simulation technology, are introduced. The full electromagnetic transient simulation of the AC power system above 10kV in Fujian power grid based on the dispatching control cloud platform is realized. Study cases are carried out and the validity and accuracy of the simulation are verified by comparing the actual fault recording data and simulation waveforms.

关键词： Cloud computing Computational modeling System integration Power system stability Parallel processing Power grids Dispatching

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Post-Measurement Simulation-Based Pilot protection of Ac Transmission Lines in Wind Farms

SSRN

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SSRN 2024年

作者： Shu, Hongchun Guan, Cheng Dai, Yue Tang, Yutao State Key Laboratory of Collaborative Innovation Center for Smart Grid Fault Detection Protection and Control Jointly Kunming University of Science and Technology Kunming650500 China Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming650500 China Faculty of Land Resources Engineering Kunming University of Science and Technology Kunming650500 China Faculty of Mechanical and Electrical Engineering Kunming University of Science and Technology Kunming650500 China

In AC transmission lines within wind farms, fault-induced short-circuit currents pose challenges to traditional protection mechanisms due to their limited magnitude and complex waveforms. To overcome this, a pilot protection scheme based on post-measurement simulation and model matching is proposed. An analysis of conventional protection methods' applicability to wind farm feeder lines is conducted. Using the Bergeron model, current expressions at the midpoint from both wind farm and system sides are derived. Absolute value integration within a short time window is performed. During normal operation or out-of-area faults, output line measurement matches the Belong model, resulting in small integrated current sums. Conversely, intra-area faults exhibit a mismatch, leading to significantly larger integrated current sums. Simulation results confirm robustness against transitional resistances and independence from fault distance and current transformer saturation. Theoretical analysis aligns with practical simulations.© 2017 Elsevier Inc. All rights reserved. © 2024, The Authors. All rights reserved.

关键词： Electric power transmission

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Impact of Generation Companies’ Heterogeneous Investment Behaviors on the Effects of Non-fossil Energy Incentive Policies

Impact of Generation Companies’ Heterogeneous Investment Be...

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Sustainable Power and Energy Conference (iSPEC)

作者： Bin Cai Tianran Li Kui Wang Zhiyuan Li Lei Zhu Jun Wen Yusheng Xue State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation/State Grid Electric Power Research Institute Nanjing China NARI School of Electrical and Automation Engineering Engineering Laboratory of Gas-Electricity Integrated Energy of Jiangsu Province Nanjing Normal University Nanjing China China Huaneng Group Co. Ltd Beijing China

ISBN: (纸本)9781665414401

The incentive policies for non-fossil energy are important factors affecting the investment behavior of generation companies (GENCOs). However, the investment behavior of different types of GENCOs in the system could be quite different, so the implementation of the policy must consider how to achieve incentive compatibility with the investment behavior of GENCOs. This article constructs a power transition simulation model that considers the investment behavior of GENCOs. Taking the wind power feed-in tariff policy as an example, it analyzes the impact of policy on the whole system’s low carbon transition pathway of the power structure and the evolution trajectory of system carbon emissions under different behavior scenarios.

关键词： Economics Analytical models Conferences Tariffs Carbon dioxide Companies Wind power generation

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Research on Service-Oriented Substation Wide-Area Operation and Maintenance System and Its Application

Research on Service-Oriented Substation Wide-Area Operation ...

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Sustainable Power and Energy Conference (iSPEC)

作者： Feng Liang Xudong Liang Shanglin Yang Hongxiang Pan NARI Group Corporation State Key Laboratory of Smart Grid Protection and Control Nanjing China NARI Group Corporation Nanjing China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

The substation has the features of a large quantity and wide-area distribution. With the promotion of unattended mode, it has become increasingly difficult to adapt to the needs of smart grid development using traditional field-based automatic equipment operation and maintenance(O&M) method. Meanwhile, there is a shortage of professional and technical personnel, and the O&M technology of a large number of intelligent heterogeneous secondary equipment is complicated and challenging to maintain. Therefore, it is urgent to solve the problems of O&M efficiency, timeliness and technical complexity of a large number of substations. Based on the service-oriented idea, this article has designed the overall structure of the trinity of service management center, O&M center and O&M substation. This paper also proposes a GSP-based service standardization interaction mechanism. Through Safety management and control process of O&M service, O&M advanced applications are designed to achieves the automation equipment specification, safe and reliable remote operation and maintenance.

关键词： Substation automation Safety management Production Standardization Reliability engineering smart grids Security

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A Risk-Averse Just-In-Time Scheme for Learning-Based Operation of Microgrids with Coupled Electricity-Hydrogen-Ammonia under Uncertainties

arXiv

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arXiv 2024年

作者： Li, Longyan Ning, Chao Pan, Guangsheng Zhang, Leiqi Gu, Wei Zhao, Liang Du, Wenli Shahidehpour, Mohammad Department of Automation Shanghai Jiao Tong University Shanghai200240 China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China School of Electrical Engineering Southeast University Nanjing210096 China Zhejiang Key Laboratory of Distributed Generations and Microgrid Technology State Grid Zhejiang Electric Power Research Institute Hangzhou310014 China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology China Department of Electrical and Computer Engineering Illinois Institute of Technology ChicagoIL60616 United States

This paper proposes a Risk-Averse Just-In-Time (RAJIT) operation scheme for Ammonia-Hydrogen-based Micro-grids (AHMGs) to boost electricity-hydrogen-ammonia coupling under uncertainties. First, an off-grid AHMG model is developed, featuring a novel multi-mode ammonia synthesis process and a hydrogen-ammonia dual gas turbine with tunable feed-in ratios. Subsequently, a state-behavior mapping strategy linking hydrogen storage levels with the operation modes of ammonia synthesis is established to prevent cost-ineffective shutdowns. The proposed model substantially improves operational flexibility but results in a challenging nonlinear fractional program. Based upon this model, a data-driven RAJIT scheme is developed for the real-time rolling optimization of AHMGs. Unlike conventional one-size-fits-all schemes using one optimization method throughout, the data-driven RAJIT intelligently switches between cost-effective deterministic optimization and risk-averse online-learning distributionally robust optimization depending on actual risk profiles, thus capitalizing on the respective strengths of these two optimization methods. To facilitate the solution of the resulting nonlinear program, we develop an equivalent-reformulation-based solution methodology by leveraging a constraint-tightening technique. Numerical simulations demonstrate that the proposed scheme guarantees safety and yields an overall cost reduction up to 14.6% compared with several state-of-the-art methods. © 2024, CC BY.

关键词： Ammonia

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Questionnaire Survey System for Residential Customers based on Developed Consumption Behavior Model

Questionnaire Survey System for Residential Customers based ...

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Chinese Automation Congress (CAC)

作者： Jianmin Zhang Dongming Liu Yusheng Xue Huanlei Yu Zhenyuan Xiao Ping Luo School of Automation Hangzhou Dianzi University Hangzhou China State Key Laboratory on Smart Grid Protection and Control Nanjing China

ISBN: (数字)9781728176871

ISBN: (纸本)9781728176888

The big obstacles for residential energy transition are from lacks of consumption behavior model and relative information system. A four-tier residential energy demand model is developed to explore the cognition-consciousness-demand-behavior evolution process; then residential energy behavior analysis data sources are investigated and necessity of questionnaire survey system is analyzed. To have a theory-supported information system, extension of Engel-Kollat-Blackwell consumption behavior model has been developed, and design of questionnaire survey system for residential customer is introduced with simple analysis of real implementation.

关键词： Green products Information systems Home appliances Energy consumption Biological system modeling Automation Cognition

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