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

作者： Qitao Liu Jianbing Xu Haibo Xu Zhao Ding Manli Li Jinhua Ren Zhaoyang Yin State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation (State Grid Electric Power Research Institute) NARI Technology Co. Ltd Nanjing China NARI Group Corporation (State Grid Electric Power Research Institute) State Key Laboratory of Smart Grid Protection and Control School of Electrical of Engineering Southeast University Nanjing China

SSCS plays the essential role in power grid operation to ensure the control reliability and effectivity. Due to the power system becomes more complex, it is inevitable to improve the simulation technology for SSCS. Thus, a digital-physical hybrid simulation platform for SSCS is required. In this paper, the requirements of the digital-physical hybrid simulation platform are analyzed and focus on the design of communication schemes for digital-physical hybrid simulation. IEC61850 and Aurora based communication technical roadmaps are proposed for the communication between RTDS and DSSCHP. Also, two options are available for the communication between SSCDs and DSSCHP.

关键词： Ion radiation effects Analytical models Synchronous digital hierarchy System integration Real-time systems power grids power system reliability

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Microgrid Energy Management Strategy Considering Source-Load Forecast Error

SSRN

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SSRN 2023年

作者： Zhang, Kaikai Zou, Guibin Zhang, Jinliang Li, Houlei Sun, Yazhong Li, Guoliang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Shandong Province Ji’nan China State Grid Jinan Electric Power Company Shandong Province Jinan China State Grid Zaozhuang Electric Power Company Shandong Province Zaozhuang China

Hybrid energy storage system (HESS) can stabilize renewable energy power generation, but unreasonable energy storage power distribution and photovoltaic-load forecast errors will affect the economic benefits of the whole system. Aiming at the microgrid (MG) composed of photovoltaic (PV) and HESS, an energy management strategy (EMS) of MG considering forecast errors is proposed. Firstly, an optimization model considering the depreciation cost of battery is established. Secondly, day-ahead EMS is implemented under multiple operating modes considering minimum fluctuation and optimal economy. Then, according to the real-time forecast results and the feedback of system operation status, the intraday rolling energy management strategy (REMS) is developed to alleviate the impact of forecast errors. Finally, the real-time state of charge (SOC) of the supercapacitor (SC) is introduced to adjust the filter coefficient, which avoids the SC working in the charge/discharge restricted area for a long time and improves the adjustment effect. The results of the case analysis show that the proposed intraday REMS can effectively reduce the influence of forecast errors on energy management. © 2023, The Authors. All rights reserved.

关键词： Forecasting

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Summary, Reflection, and Prospect of Wind power Development in China 5th

Summary, Reflection, and Prospect of Wind Power Development ...

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5th International Conference on intelligent Computing, Communication and Devices, ICCD 2019

作者： Zhou, Qiang Han, Xushan Lv, Qingquan Shen, Chenyun Wang, Mingsong Zhang, Zhenzhen State Grid Gansu Electric Power Company Electric Power Research Institute Lanzhou China Wind Power Engineering and Technology Center of Gansu Province Lanzhou China State Grid Gansu Electric Power Company Lanzhou China Gansu Key Laboratory of Renewable Energy Integration Operation and Control Lanzhou China

ISBN: (纸本)9789811558863

Wind power has made the most rapid development as a new form of energy of China in the past decade. The installed capacity of wind power and photovoltaic power generation has continued to increase. China’s total installed capacity of new energy ranks first in the world and has made remarkable achievements. Behind these remarkable achievements, there are also a series of problems, such as high abandoned wind and light rate of new energy, prominent problems of peak shaving and frequency modulation, difficulties of new energy consumption, and prominent problems of safety and stability. Based on this background, this paper systematically summarizes the development process of new energy in China in the past decade, summarizes the development experience, systematically analyzes the existing problems, and finally forecasts the future development prospects. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Wind power

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Enhancing power System Stability: A Machine Learning Approach with SVM, Random Forest and Deep Learning Utilizing Wide Area Measurements

Enhancing Power System Stability: A Machine Learning Approac...

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IEEE Student Conference on Electric Machines and Systems

作者： Chao Song Mengcan Tan Mingzhao Chu Chihan Zhou Guojie Tian Longfei Mu Shandong Future Intelligent Technology Co. Ltd Shandong Electrical Engineering & Equipment Group Co. Ltd Jinan China Fengtai Supply Company Distribution Operation and Maintenance Center State Grid Beijing Electric Power Company Beijing China Changyi Supply Company Marketing Department State Grid Shandong Electric Power Company Changyi China State Grid Kunming Power Supply Company Kunming China Shandong Tianyu Changtong Energy Group Co. Ltd. Qingdao China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (数字)9798350366945

ISBN: (纸本)9798350366952

As the scale and complexity of modern power systems continue to expand, the importance of system stability has become increasingly critical. To ensure the stable operation of the power system, this paper proposes a power system stability analysis and optimal control strategy based on the Wide Area Measurement System (WAMS). Initially, a novel stability evaluation method is established using WAMS data and machine learning techniques, enabling effective handling of complex power system data and providing accurate stability assessments. Following this, an optimal control strategy is designed based on the evaluation method, aimed at real-time adjustments of power resource allocation to enhance system stability and responsiveness. Simulation analyses confirm the effectiveness and reliability of the proposed approach, indicating that the optimized control strategy significantly improves the system's performance under disturbances. This paper presents an innovative method for the stable operation of integrated power systems, contributing to the enhancement of power supply quality within the grid and ensuring the safe and efficient operation of the overall power system.

关键词： Time-frequency analysis System performance Optimal control power system stability System recovery Stability analysis Real-time systems Wide area measurements Voltage control Thermal stability

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Research on Transforming Effect and Calculation Method of MMC Converter on AC / DC Harmonics

Research on Transforming Effect and Calculation Method of MM...

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2021 IEEE Sustainable power and Energy Conference, iSPEC 2021

作者： Cui, Liu Peng, Guangqiang He, Jingsong Wu, Jiyang Mao, Chizu Jiao, Ning Electric Power Research Institute China Southern Power Grid State Key Laboratory of Hvdc 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 Maintenance Test Center Ehv Power Transmission Company Guangzhou China Csg Key Laboratory for Dc Transmission Equipment State Evaluation and Fault Diagnosis GuangZhou China Sichuan University College of Electrical Engineering and Information Technology Chengdu China

ISBN: (纸本)9781665414395

Modular multilevel converter (MMC) is currently the most concerned voltage source converter topology in the field of flexible direct current transmission (VSC-HVDC). Due to its non-linear characteristics, harmonic components will inevitably be generated in AC and DC systems, which may affect the operation of equipment and system, cause protection equipment to malfunction, and cause interference to neighboring communications. The MMC converter is a non-linear device, which can be considered as an amplifying modulator with voltage and current conversion functions. The AC and DC networks are coupled to each other through the MMC converter to generate dynamic harmonic interaction. In recent years, harmonic instability problems have appeared in many VSC-HVDC projects. Compared with other converter topologies, the transfer relationship of harmonics on the AC and DC sides of MMC converters has not been studied in depth. In this paper, by studying the AC/DC harmonic conversion characteristics of MMC converters, it reveals the conversion law of MMC converters between AC/DC harmonics;through theoretical derivation, the quantitative calculation method of MMC harmonic transmission process is given. PSCAD simulation results prove the correctness of the above results. © 2021 IEEE.

关键词： Transmissions

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Optimization Study on the control Strategy of DC Line Fault Recovery for Yongren-Funing HVDC

Optimization Study on the Control Strategy of DC Line Fault ...

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

作者： Yukun Zhu Libin Huang Shuyong Li Yihua Zhu Yantao Song Ren Liu State Key Laboratory of HVDC China Southern Power Grid Electric Power Research Institute 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 China Southern Power Grid Electric Power Research Institute Guangzhou China XJ Electric Co Ltd Xuchang China

The ±500kV Yongren-Funing HVDC transmission project is the first HVDC project whose sending and receiving ends are both located in the same province. When DC line fault happened under the condition of inter-communication fault between the pole control systems of the rectifier and inverter stations, the HVDC system cannot be blocked because of the frequent repeating actions of the DC line fault recovery in the inverter station. In order to solve the problem, an optimal control strategy of direct blocking HVDC system was proposed to solve the above issue. The optimization control strategy was verified by RTDS simulation. The simulation results showed that the proposed optimization control strategy of the DC line fault recovery could solve the above problems effectively. The proposed strategy has already been implemented on site permanently, which has great significance for the HVDC/UHVDC transmission projects in operation currently.

关键词： HVDC transmission Simulation Capacitors Rectifiers Optimal control System integration Inverters

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Design and Application Research of Synchronous Temporary Block Function between Valve Groups on Modular Multilevel Converter Ultra High Voltage Direct Current System

Design and Application Research of Synchronous Temporary Blo...

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Sustainable power and Energy Conference (iSPEC)

作者： Qinlei Chen Xuehua Lin Zhijiang Liu Qi Guo Libin Huang Guanming Zeng Shuyong Li Deyang Chen Chao Luo Electric Power Research Institute China Southern Power Grid Guangzhou China CSG Key Laboratory for Power System Simulation China Southern Power Grid Guangzhou China State Key Laboratory of HVDC 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 National Energy Power Grid Technology R&D Centre China Southern Power Grid Guangzhou China

ISBN: (纸本)9781665485234

Compared with the half controlled power electronic devices such as thyristor, the over-current ability of fully controlled power electronic devices such as insulated gate bipolar transistor (IGBT) is weak. In order to ensure that bridge arm current does not exceed the bearing range of modular multilevel converter (MMC) switching devices under AC fault ride through and other scenarios, MMC high voltage direct current (HVDC) system projects are equipped with temporary block (TB) function, IGBTs are protected by suspending the trigger pulse before bridge arm current reaches the maximum safe current of the switch. The structure of high side and low side valve group (VG) in series are adopted in ultra high voltage direct current (UHVDC) system. For line commuted converter (LCC) UHVDC system, the converter is current source type, During normal operation, there is no need to control the voltage balance between high side and low side VG, and after one VG is disturbed by commutation failure, the impact on another VG is relatively small. For MMC-UHVDC system, the converter is voltage source type, during normal operation, the voltage balance between high side and low side VG should be controlled. When a transient disturbance such as AC fault occurs, if one VG is temporary blocked due to bridge arm over-current, and another VG is not temporary blocked or the time of temporary blocked is later, the VG blocked first may tripped due to sub-module (SM) overall over-voltage or bridge arm over-current, and the scope of the accident is expanded, which is not conducive to the flexible and reliable operation of MMC-UHVDC. Therefore, the impact of non synchronous temporary block of MMC-UHVDC VGs is firstly analyzed in this paper, and then synchronous temporary block (STB) function between VGs is proposed, and the hardware interface scheme, STB signal sending and receiving logic, enable conditions and other aspects between VGs are elaborated. Finally, taking kunliulong project, the world’

关键词： Insulated gate bipolar transistors Multilevel converters Bridge circuits High-voltage techniques Switches Valves Real-time systems

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Hardware in Loop Real-Time Simulation Test Research and Engineering Application of Multi-Terminal Hybrid Ultra High Voltage DC Current control and protection System

Hardware in Loop Real-Time Simulation Test Research and Engi...

引用

Sustainable power and Energy Conference (iSPEC)

作者： Qinlei Chen Qi Guo Xuehua Lin Shuyong Li Libin Huang Deyang Chen Zhijiang Liu Chao Luo Guanming Zeng Yuanhong Lu Electric Power Research Institute China Southern Power Grid Guangzhou China State Key Laboratory of HVDC China Southern Power Grid Guangzhou China CSG Key Laboratory for Power System Simulation 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

ISBN: (纸本)9781665485234

The multi-terminal hybrid ultra-high voltage direct current (MTH-UHVDC) transmission technology combining line commuted converter ultra-high voltage direct current (LCC-UHVDC) technology and modular multilevel converter ultra-high voltage direct current (MMC-UHVDC), provides a more flexible and advanced mode to meet the needs of longer distance and larger capacity clean energy transmission. Compared with the two-end HVDC system, the control and protection (C&P) functional and dynamic characteristics of MTH-UHVDC transmission system are more complex. The real-time simulation technology must be used to carry out the experimental research before the engineering application. However, the hardware in loop (HIL) real-time simulation test of MTH-UHVDC transmission system is faced with many technical problems, such as multi-type interface of test system, accurate modeling of UHVDC MMC valve, full access of C&P devices, etc. Therefore, from the perspective of simulation test research and engineering application, this paper proposes a HIL real-time simulation test method for C&P system of MTH-UHVDC transmission system. The design of test system, accurate modeling of primary system, modeling of C&P system, interface technology of test system, functional and performance test method of C&P system and engineering application are deeply studied. Taking kunliulong project, the world’s first MTH-UHVDC project, as the application background, a real-time simulation test system for C&P system is established by the proposed method. The functional performance test (FPT) and dynamic performance test (DPT) are carried out using the established test system, and the simulation test waveforms are compared with the field test waveforms. The results show that the response characteristics of the two systems are consistent, and the test system established in this paper can meet the needs of accurate real-time simulation test and research, and can provide technical support for the application of M

关键词： Performance evaluation Current control Multilevel converters HVDC transmission High-voltage techniques Systems modeling Valves

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Two-step Optimal Allocation of Stationary and Mobile Energy Storage Systems in Resilient Distribution Networks

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Journal of Modern power Systems and Clean Energy 2021年第4期9卷 788-799页

作者： Xinyi Jiang Jian Chen Qiuwei Wu Wen Zhang Yicheng Zhang Jie Liu Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan 250061China Center for Electric Power and Energy(CEE) Department of Electrical EngineeringTechnical University of Denmark(DTU)2800 Kongens LyngbyDenmark Institute for Infocomm Research(I2R) Agency for ScienceTechnology and Research(A*STAR)Singapore State Grid Yantai Power Supply Company YantaiChina

Energy storage systems (ESSs) are acknowledged to be a promising option to cope with issues in high penetration of renewable energy and guarantee a highly reliable power supply. In this paper, a two-step optimal allocation model is proposed to obtain the optimal allocation (location and size) of stationary ESSs (SESSs) and mobile ESSs (MESSs) in the resilient distribution networks (DNs). In the first step, a mixed-integer linear programming (MILP) problem is formulated to obtain the preselected location of ESSs with consideration of different scenarios under normal operation conditions. In the second step, a two-stage robust optimization model is established to get the optimal allocation results of ESSs under failure operation conditions which are solved by column-and-constraint generation (C&CG) algorithm. A hybrid ESS allocation strategy based on the subjective and objective weight analysis is proposed to give the final allocation scheme of SESSs and MESSs. Finally, the proposed two-step optimal allocation model is demonstrated on a modified IEEE 33-bus system to show its effectiveness and merits.

关键词： Resilient distribution network stationary energy storage system mobile energy storage system optimal allocation

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Closed-loop Simulation Method of Stability control System Based on Virtual Component Technology

Closed-loop Simulation Method of Stability Control System Ba...

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

作者： Qinfeng Ma Yihua Zhu Mingshun Liu Dongxu Chang Qingxin Pu Chengxiang Li Power Dispatching Control Center of Guizhou Power Grid Co. Ltd Guizhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China

The stability control system is an important means to ensure the safe and stable operation of the power system. In view of the shortcomings of the existing offline/real-time simulation test methods, a closed-loop simulation scheme based on virtual component technology is proposed. The virtual component technology of the stability control device is researched, and the virtualization method of the external hardware interface of the device is designed. On this basis, a closed-loop simulation framework of the stability control system under the offline/real-time simulation test environment is proposed. The functional logic of each component under the framework are analyzed. The calculation and feedback process of the entire closed-loop simulation system are analyzed in depth, which effectively solves the difficulty of simulation analysis and test verification of large-scale stability control system, providing a new method for the research and verification of stability control system strategy.

关键词： Analytical models Process control System integration power system stability control systems Stability analysis Hardware

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