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International Conference on power Electronics and Motion control (IPEMC)

作者： Dexin Li Xiangyu Lv Junhui Li Pengcheng Yue Chunguang Tian Jiarui Wang Changxing Ge Gangui Yan Electric Power Research Institute State Grid Jilin Electric Power Co. Ltd. Changchun China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Jilin China

ISBN: (数字)9781728153018

ISBN: (纸本)9781728153025

This paper comprehensively needs to investigate the cost of energy storage system (ESS), the cost of equivalent charging and discharging, the economic benefits, and other factors to consider, aiming at comprehensive benefit maximization, setting the operation mode and configuration method of wind farm ESS when adapting to wind power generation capacity. Taking 2017 restricted wind farms in northeast China as an example, the ESS configuration method proposed in this paper can improve the degree of wind power integration. The example shows that the optimal configuration of ESS is closely related to the wind farm power fluctuation characteristics, the degree of limitation and the ESS cost. When too much capacity is allocated, the ESS is no longer economical.

关键词： Economics Vanadium Wind power generation Wind farms power electronics Resource management Motion control

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Peaking Demand Analysis and Visualization simulation Platform Implementation of High Proportion of Wind power Infiltration Grid

Peaking Demand Analysis and Visualization Simulation Platfor...

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IEEE/IAS Industrial and Commercial power system Asia (I&CPS Asia)

作者： Xiangyu Lv Dexin Li Junhui Li Changxing Ge Chunguang Tian Jiarui Wang Gangui Yan State Grid Jilin Electric Power Co. Ltd. Electric Power Research Institute Changchun China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education(Northeast Electric Power University) Jilin China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143040

This paper proposes a analysis method of peak shaving demand for power grid, and analyzes the impact of wind power grid connection on power system peak shaving under different wind power permeability, and analysis the operational characteristics of energy storage assisted peak shaving to compare different energy storage systems. Finally, in order to facilitate the implementation and observation of the analysis results, a visual simulation platform was built. The results of the example show that the method described in this paper can accurately analyze the peaking shaving demand under different wind power permeability. At the same time, the total yield of lithium iron phosphate battery is the highest in the choice of energy storage type, which is 497 million yuan/year. All-vanadium redox flow batteries may benefit more than lithium iron phosphate batteries in the future due to battery characteristics. Finally, the visualization platform is true and effective and can fully express the method described in this paper.

关键词： Wind power generation Batteries Permeability power grids Lithium

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Filter-Based Fault Diagnosis of Heat Exchangers 6th

Filter-Based Fault Diagnosis of Heat Exchangers

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6th International Conference on Life system Modeling and simulation, LSMS 2020, and 6th International Conference on Intelligent Computing for Sustainable energy and Environment, ICSEE 2020

作者： Zhang, Jianhua Li, Hongrui Fan, Penghao Hou, Guolian Ren, Mifeng State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China School of Control and Computer Engineering North China Electric Power University Beijing102206 China College of Information Engineering Taiyuan University of Technology Taiyuan030024 China

ISBN: (纸本)9789813363779

In this paper, a filter is proposed to diagnose fouling and sensor faults of heat exchangers. First, a typical heat exchanger system model is established, a filter based on the survival information potential is then designed for non-Gaussian stochastic systems. Consequently, the state estimation generated by the filter is used for fault detection, and the support vector machine is then employed to identify fouling and fault location of heat exchangers. The simulation results show that the fault diagnosis of heat exchangers can be effectively. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Support vector machines

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Investigating the transient torque of turbo-generators in a power system integrating wind farms 8

Investigating the transient torque of turbo-generators in a ...

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8th renewable power Generation Conference, RPG 2019

作者： Yang, Bowen Yan, Gangui Xie, Xiaorong Wang, Yanhui Tang, Jian Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing China State Grid East Mongolia Electric Power Supply Co. Ltd. Hohhot China

ISBN: (纸本)9781839531255

The renewable energy sources connected to the grid will cause the power system to oscillate and even affect neighbouring turbo-generators. For example, the wind turbines and their converter control systems may cause shaft torsional vibration in the steam turbine units, which affects the safety of the system. Therefore, it is of significance to investigate the transient torque of turbo-generators in a power system integrating wind farms. This paper takes a power plant in Inner Mongolia area of China as the case, the power of which is transmitted via the AC/DC hybrid power system with wind and thermal power. A typical equivalent system model of the wind-thermal-bundled access network is established firstly. Consider setting the fault on the line with series capacitor compensation and observe units' torque variation. Then the impact on sub-synchronous resonance (SSR) characteristics from many factors was investigated through the time-domain simulation, including the unit combination mode (including the long-term accessed DFIGs condition), the fault type and position, the system equivalent impedance, the fault starting/clearing time and the mechanical mutual damping coefficient of shafting, etc. Finally, the influence of each factor on transient torque is summarized, and the inner associations between the shaft torsional vibration in the turbo-generators and the converter-based wind turbines are clarified. © 2019 Institution of Engineering and technology. All rights reserved.

关键词： Wind turbines

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Iterative rational krylov algorithms for model reduction of a class of constrained structural dynamic system with engineering applications

arXiv

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arXiv 2021年

作者： Du, Xin Uddin, Mohammad Monir Fony, A. Mostakim Hossain, Md. Tanzim Shuzan, Md. Nazmul Islam School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China Department of Mathematics and Physics North south University Dhaka1229 Bangladesh Department of Mathematics Chittagong University Chittagong Bangladesh Department of Electrical and Computer Engineering North South University Dhaka1229 Bangladesh

This paper discusses model order reduction of large sparse second-order index-3 differential algebraic equations (DAEs) by applying Iterative Rational Krylov Algorithm (IRKA). In general, such DAEs arise in constraint mechanics, multibody dynamics, mechatronics and many other branches of sciences and technologies. By deflecting the algebraic equations the second-order index-3 system can be altered into an equivalent standard second-order system. This can be done by projecting the system onto the null space of the constraint matrix. However, creating the projector is computationally expensive and it yields huge bottleneck during the implementation. This paper shows how to find a reduce order model without projecting the system onto the null space of the constraint matrix explicitly. To show the efficiency of the theoretical works we apply them to several data of second-order index-3 models and experimental resultants are discussed in the paper. © 2021, CC BY.

关键词： Differential equations

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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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Sustainable power and energy Conference (iSPEC)

作者： Liu Cui Guangqiang Peng Jingsong He Jiyang Wu Chizu Mao Ning Jiao State Key Laboratory of HVDC 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 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 CSGKEY LABORATORY FOR DC TRANSMISSIONEQUIPMENT STATE EVALUATION AND FAULT DIAGNOSIS GuangZhou China College of Electrical Engineering and Information Technology Sichuan University Chengdu China

ISBN: (纸本)9781665414401

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.

关键词： Network topology simulation Bridge circuits Voltage power system harmonics Harmonic analysis Frequency conversion

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Review on Pumped Storage power Station in High Proportion renewable energy power system

Review on Pumped Storage Power Station in High Proportion Re...

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IEEE Student Conference on Electric Machines and systems

作者： Bingxin Sun Shuping Tian Jiang He Liande Liu Zhiqiang Wang Jiawei Guo Fei Xu Te Cheng Junhui Li Inner Mongolia Hohhot Pumped-Storage Power Generation Co LTD Hohhot China State Key Lab of Power Systems Tsinghua University Beijing China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Powe University) Jilin China

ISBN: (数字)9781728156224

ISBN: (纸本)9781728156231

Large scale renewable energy, represented by wind power and photovoltaic power, has brought many problems for the safe and stable operation of power system. Firstly, this paper analyzes the main problems brought by large-scale wind power and photovoltaic power integration into the power system. Secondly, the paper introduces the basic principle and engineering construction of pumped storage power station. Thirdly, the paper expounds in detail the current application of pumped storage power station in power system, and finally points out the main problems faced by the development of Pumped Storage power Station and the development trend, so as to provide reference for the construction and operation of pumped storage power station.

关键词： Photovoltaic systems renewable energy sources Conferences Pumps Wind power generation Market research power systems

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Multi-objective optimal dispatch method based on source-network-load-storage interaction system for DC distribution network 8

Multi-objective optimal dispatch method based on source-netw...

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8th renewable power Generation Conference, RPG 2019

作者： Quan, Ran Li, Guoqing Jin, Guobin Liu, Zhao Chen, Qing Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China State Grid Jiangsu Electric Power Co. Ltd. Nanjing China Jiangsu Electric Power Company Research Institute Nanjing China

ISBN: (纸本)9781839531255

The DC distribution network can integrate the photovoltaic power generation system with high efficiency, but the random fluctuation of the photovoltaic output power is strong and there is a problem of PV consumption, which has a certain degree of impact on the economic optimization operation of the system. Therefore, the source-network-load-storage optimization interaction concept is introduced in the DC distribution network. Based on the in-depth analysis of the interactive load characteristics, the interaction load and energy storage technology can be fully utilized to the system to consumpt the photovoltaic. Combined with the features of DC distribution network structure, comprehensively consider the impact of the interactive load and energy storage system collaborative optimization on the system operating cost and power flow distribution, so that both the power generation side and the power side can participate in the resource optimization configuration of the grid operation. A multi-objective optimal scheduling model for photovoltaic DC distribution networks with operational cost, network loss and voltage deviation is established. The simulation example shows that: Collaborative optimization using interactive load and energy storage system can greatly reduce system operating cost, network loss and voltage deviation, effectively improve the level of PV consumption, and realize safe and reliable operation of DC distribution network. © 2019 Institution of Engineering and technology. All rights reserved.

关键词： energy storage

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Pitch control Strategy of Permanent Magnet Synchronous Wind Turbine Generator in Response to Cluster Auto Generation control Command

Pitch Control Strategy of Permanent Magnet Synchronous Wind ...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Cui, Yang Zeng, Peng Cui, Cheng-Wei Key Laboratory of Modern Power System Simulation and Control Renewable Energy Technology Ministry of Education North-east Electric Power University Jilin132012 China Neimenggu Power Supply Company Sunite Youqi Power Supply Branch of Xilin Gol Electric Power Bureau INNER MONGOLIA POWER GROUP CO LTD Xilinguole China

ISBN: (纸本)9781728135205

With the development of auto generation control (AGC) technology at home and abroad and the popularization of permanent magnet synchronous wind turbine generator(PMSG), more regions use AGC technology to dispatch power to wind farms. In view of the current problem of permanent magnet wind turbines responding to AGC commands, this paper proposes wind power control strategy for different operating conditions of the unit: For the maximum power output required by AGC, the maximum power tracking control and the pitch control strategy based on the rated speed are adopted according to the current speed;when the AGC requires the output to be reduced, the power difference based on the current speed is used. Pitch control and pitch control strategy based on rated speed. Compared with the traditional control strategy, the pitch control strategy based on the power difference can reduce the control time and suppress the fluctuation range of the active power in the control process. Finally, based on PSCAD, the simulation model of permanent magnet direct drive wind turbine is built and the response of AGC command is simulated under different working conditions, and the effectiveness of the proposed strategy is verified. © 2019 IEEE.

关键词： Wind Turbine Generators

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A review of bearing fault diagnosis for wind turbines

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IOP Conference Series: Earth and Environmental Science 2021年第1期675卷

作者： Bing Liu Baixin Liu Qingbin Dai Huaping Liu AnHui JEP New Energy Co LTD AnHui 230000 China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Jilin 132012 China

Bearings are the core components of the wind turbine's mechanical transmission system, but the bearings of wind turbines are prone to wear and failure during vibration, and it is often difficult to determine the fault-bearing status and fault location. Therefore, the monitoring and fault diagnosis of wind turbine bearing status are very necessary. This paper introduces the types of bearings of wind turbines and common faults of bearings, analyzes from the aspects of bearing vibration data and supervisory control and data acquisition (SCADA) systems, summarizes the existing fault diagnosis methods and systems of wind turbine bearings, and points out the basics of these methods thought. Finally, the research focus of future bearing fault diagnosis is elaborated.

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