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检索条件"机构=Status Key Lab of Control and Simulation of Power Systems and Generation Equipments"

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Optimal design of SVC-based subsynchronous damping control using genetic and simulated annealing algorithm

Optimal design of SVC-based subsynchronous damping control u...

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International Conference on Information and Automation (ICIA)

作者： Tingzhi Yang Xiaorong Xie Shiyu Liu Donghui Zhang State Key Laboratory of security control & simulation of power systems and large-scale generation equipments Department of Electrical Engineering Tsinghua University Beijing China

In this paper, an optimal approach based on genetic and simulated annealing algorithm (GASA) is prosposed to design more effective and robust subsynchronous damping control (SSDC) of Static Var Compensator (SVC) for multimodal SSR damping improvement. A practical multi-machine series compensated power system suffering multimodal SSR has been studied to demonstrate the effectiveness of the approach. The developed SSDC comprises independent modal control path, each with separate feedback gains and phase-shifts, to damp different torsional mode. The problem of simultaneously tuning all the control parameters for robust stabilization of multiple torsional modes over various system conditions is formulated into a standardized constrained optimization problem. With the proposed GASA, the problem is efficiently solved and the SVC SSDC is optimized. Both eigenvalue analyses and electromagnetic simulations have been conducted on the test system to validate the approach and the designed SVC-based SSDC.

关键词： Static VAr compensators Damping Generators Gallium power system dynamics Optimization power systems

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Analysis and Suppression of Subsynchronous Oscillation of RuDong Wind power Through MMC-HVDC system

Analysis and Suppression of Subsynchronous Oscillation of Ru...

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2021 Annual Meeting of CSEE Study Committee of HVDC and power Electronics, HVDC 2021

作者： Li, Jingyi Xie, Xiaorong Yang, Jianjun Li, Haozhi Shi, Zhaohui Wang, Ke Fu, Chunxiang Yang, Wenbin Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province Huadong Engineering Corporation Limited Power China Zhejiang Province Hangzhou310014 China Dept. of Electrical Engineering Tsinghua University State Key Lab of Control and Simulation of Power Systems and Generation Equipment Haidian District Beijing100084 China

ISBN: (纸本)9781839537035

There may be complex interaction between the converter control systems of wind power and MMC-HVDC, which will lead to sub-/super-synchronous oscillation and threaten the safe and stable operation of the system. The relevant events have been reported in Guangdong Nan'ao, Shanghai Nanhui and Zhangbei projects. Rudong offshore wind power project is the first offshore wind power transmission system in China, and it is still under construction. Therefore, it is of great significance to carry out the research on the risk analysis and suppression measures of sub-synchronous oscillation in Rudong wind power MMC-HVDC system. First, the time-domain simulation model of Rudong wind power MMC-HVDC system is built in the PSCAD/EMTDC simulation model. Then, the effects of the number of wind turbine generators, wind power output and the parameters of MMC-HVDC controller on the sub-/supersynchronous oscillation characteristics of the system are further analyzed. Finally, the suppression measures based on supplementary frequency dependent gain control are proposed, the application position of the controller is discussed, and the parameter optimization method of the controller is given. The research content provides a certain guiding significance for the operation and control of Rudong wind power MMC-HVDC. © 2021 IET Conference Proceedings. All rights reserved.

关键词： Wind power

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Characteristics calculation and pattern recognition for partial discharge of cable joint

Characteristics calculation and pattern recognition for part...

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2014 International Conference on Communication Technology and Application(CTA2014)

作者： Y.F.Xia J.F.Gui X.Y.Chen S.Y.Gao J.H.Huang J.H.Lin Dongguan Power Breuse of Guangdong Grid School of Electrical Engineering Beijing Jiaotong University Department of Electrical Engineering Tsinghua University State Key Lab of Control and Simulation of Power Systems and Generation Equipments

ISBN: (纸本)9781845649302

For PD pattern recognition, six kinds of typical cable fault models are made and tested. Characteristics are calculated from test data. Multiple statistical characteristics of PD distribution map are calculated and pattern vectors are formed. Artificial neural network is trained for recognition. Through the selection and adjustment of characteristics and network parameters, recognition effect with satisfactory result is obtained.

关键词： cable joint partial discharge recognition

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Research on Peak Load Regulation Capacity Planning for Long-term Market

Research on Peak Load Regulation Capacity Planning for Long-...

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2017 International Electrical and Energy Conference (CIEEC 2017)

作者： Jiheng Jiang Ying Qiao Zongxiang Lu Ningbo Wang Jin Li Kun Ding State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept.of Electrical Engineering Tsinghua University Key Laboratory of Wind Power Integration Operation and Control of Gansu Province Gansu Electric Power Corporation Wind Power Technology Center

Insufficient power capacity for peak load regulation has caused loss of wind power accommodation in China.A regulation capacity market is under consideration to encourage more peak regulation service,thus how much the market would be is important for each participant.A new peak-load regulation capacity planning method is proposed for long-term market based on the wind power curtailment evaluation model using probabilistic production *** method is suitable for the situation in the planning stage without the knowledge of detailed sequences of load and renewable power,and includes modeling of two peak load regulation measures,increasing the adjustable capacity and to shift some long-lasting units to on/off cycling units.A typical area in China is studied in the paper to evaluate the actual effects of different measures.

关键词： adjustable capacity capacity planning peak load regulation probabilistic production simulation

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Wind-CHP generation aggregation with storage capability of district heating network

Wind-CHP generation aggregation with storage capability of d...

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2017 IEEE Conference on Energy Internet and Energy System Integration, EI2 2017

作者： Yu, Jing Shen, Xinwei Sheng, Tongtian Sun, Hongbin Xiong, Wen Tang, Lei Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Institute Tsinghua University Shenzhen China State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing China Guangzhou Power Grid Company Guangzhou China Beijing Qingda Gaoke System Control Company Beijing China

ISBN: (纸本)9781538614273

The strong coupling of electricity and heat of combined heat and power (CHP) unit in cold season results in the loss of flexibility, which may cause massive wind power curtailment if they are in the same system. This issue could be handled with the thermal storage capability of a district heating network (DHN) that could supply flexibility for CHP to decouple the strong coupling of heat and electric power supplies. In this paper, a wind-CHP generation aggregation(WCGA) model is formulated, which motivates CHP to increase wind power integration by increasing total profit of the system, while considering the additional flexibility supplied by DHN. In WCGA model, DHN is formulated as an energy-storage-like (ESL) model that considers the storage capability of DHN based on dynamic characteristics of temperature and time delay effect of DHN. The potential benefits of the proposed model have been demonstrated by case study in terms of enhancing, wind power integration as well as total profit. © 2017 IEEE.

关键词： District heating

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Test and analysis of conducted disturbance sources of the truck crane under stable conditions

Test and analysis of conducted disturbance sources of the tr...

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International Symposium on Electromagnetic Compatibility, EMC EUROPE 2012

作者： Xiao, Li Yu, Zhanqing Chen, Shuiming Zhang, Bo Zeng, Rong Zhuang, Chijie Zeng, Yang Yu, Xiaoying Zhang, Qian State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing China Research Institute Zoomlion Heavy Industry Science and Technology Development Co. Ltd. Changsha Hunan China

ISBN: (纸本)9781467307185

The Electromagnetic Compatibility (EMC) is a major issue for the truck crane designing, due to the large dimension. The conducted disturbance sources of truck crane was measured under stable conditions, the time domain characteristics of possible conducted disturbance sources was analyzed, and typical waveforms were concluded to solve the EMC (Electromagnetic Compatibility) issue. The electromagnetic disturbance characteristics at different test points under different operation conditions were compared, and the influence of different factors was studied. The amplitude and frequency parameters of the major disturbance sources were compared with the standard immunity test pulses suggested by ISO7637-2. The differences between them indicate that the extant standard might not apply to the test of the truck crane. The presented results could form a basis for the development of a special standard for the EMC test of the truck crane and further relevant EMC research. © 2012 IEEE.

关键词： Electromagnetic compatibility

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Research on General Terminal of Intelligent Measurement and control of Distribution Network Based on Open Architecture

Research on General Terminal of Intelligent Measurement and ...

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Telecommunications, Optics and Computer Science (TOCS), IEEE Conference on

作者： Xiaobing Xiao Yongxiang Cai Xiaomeng He Yue Li Yujie Ding Ergang Zhao Electric Power Research Institute of Guizhou Power Grid Co. Ltd Guiyang China Generation Equipments Dept. of Electrical Engineering State Key Lab of Control and Simulation of Power Systems Beijing China

ISBN: (纸本)9781665470544

With the continuous advancement of the construction of new power systems, the data information of the power system is increasing exponentially, and the spatiotemporal distribution of the use of smart terminals and electrical equipment is more scattered. Data collection and analysis of traditional power systems will be a huge challenge. In order to meet the actual needs of multi-scenario, multi-service, and changeable measurement and control objects of intelligent distribution network, this paper firstly studies the design of general terminal open architecture for distribution network multi-measurement and control scenarios, proposes a data service architecture based on open architecture, and establishes a self-description-based open architecture design. The unified information model of the Internet of Things protocol, research and development of intelligent measurement, and the controlling of universal terminals meet multiple communication methods, and realize the deployment verification of intelligent measurement.

关键词： power measurement Computer architecture Distribution networks Data collection Optical variables measurement Hardware power systems

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Repeated Strike Process During Disconnector Operation in Ultra-High Voltage Gas-Insulated Switchgear

Repeated Strike Process During Disconnector Operation in Ult...

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作者： Guan, Yonggang Cai, Yuanji Chen, Weijiang Liu, Weidong Li, Zhibing Yue, Gongchang Zhang, Junmin State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing100084 China State Grid Corporation of China Beijing100031 China China Electric Power Research Institute Beijing100192 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China

Very fast transient over-voltage (VFTO), induced by disconnector operations in gas-insulated switchgears, has become the limiting dielectric stress at ultra-high voltage levels. Much work has been done to investigate single-strike waveforms of VFTO. However, little study has been carried out investigating the repeated strike process, which would influence VFTO significantly. In this paper, we carried out 450 effective experiments in an ultra-high voltage test circuit, and conducted calculations through the Monte Carlo simulation method, to investigate the repeated strike process. Firstly, the mechanism of the repeated strike process is proposed, based on the experimental results. Afterwards, statistical breakdown characteristics of disconnectors are obtained and analyzed. Finally, simulations of the repeated strike process are conducted, which indicate that the dielectric strength recovery speed and polarity effect factor have a joint effect on VFTO. This study enhances the understanding of the nature of VFTO, and may help to optimize the disconnector designed to minimize VFTO.

关键词： Monte Carlo methods

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Research on Reliability of Ad hoc Network Communication in UAVs Formations

Research on Reliability of Ad hoc Network Communication in U...

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IEEE International Symposium on Electromagnetic Compatibility (EMC-Beijing)

作者： Yanchu Li Shufang Li Qingqing Ding Chao Wang School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China State Key Lab of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing China

As an important performance index of the UAV Ad hoc network, network reliability is a great significance for the performance evaluation of the UAV network system, and provides a direction for the selection of the UAVs formations. In this paper, based on the 3D Gauss Markov moving model, we modeled the motion mode of the UAV group. By using the Weibull distribution to sample the failure of the fleet, and through the correlation matrix which characterizes the connectivity state of network nodes in the time domain, we studied and compare the reliability of the self-organizing network of the UAV group with different formations. It provides a basis for selecting the formations of the UAVs for different network requirements.

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Evaluation of Prediction Choice in Economic Dispatch with Uncertainty

Evaluation of Prediction Choice in Economic Dispatch with Un...

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2017 International Electrical and Energy Conference (CIEEC 2017)

作者： Fan Zhang Ying Qiao Zongxiang Lu Ningbo Wang Jin Li Kun Ding State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept.of Electrical EngineeringTsinghua University Key Laboratory of Wind Power Integration Operation and Control of Gansu Province Gansu Electric Power Corporation Wind Power Technology Center

The unavoidable wind power forecast error results in the pervasive uncertainty in power system economic *** order to solve optimization problem such as economic dispatch with random variables,the commonest and simplest method is using a deterministic value to replace this random *** kinds of predictions are used such as maximumlikelihood approximation,expectation and *** study analyses the effect of these prediction choices on uncertainty of power system via comparing their statistical *** is shown that when the wind power output is very volatile,the quality of these prediction choices is not ***,a simplified three-unit thermal system and a tenunit system are studied for illustrating the consequence of statistical inconsistency.

关键词： Economic Dispatch expectation maximumlikelihood prediction uncertainty wind power forecast error

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