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2017 International Conference on Mechanical and Mechatronics Engineering(ICMME2017)

作者： Rui-ming OU Gun YANG Zhan-qing YU Jin-bo WU Shui-ming CHEN Hong-jun ZHEN Qingyuan Power Supply Bureau of Guangdong Grid Company State Key Lab.of Control and Simulation of Power Systems and Generation Equipment Department of Electrical EngineeringTsinghua University

In this paper,the actual trip of typical transmission line is *** includes the trip frequency of transmission lines and the tripping frequency caused by lightning,seasonal distribution characteristics of transmission line trip,and the success rate of reclosing on the transmission *** this paper,the probability of the occurrence of the trip again is evaluated based on the duration of ground lightning *** the increase of the time of reclosure,the probability of the occurrence of the trip will *** this calculating method,the average probability of tripping of reclosure decreased significantly during a ground lightning stroke process,when the reclosing time t0 is 1 s.

关键词： Trip of transmission line Trip caused by lightning Reclosing time of reclosure Probability of tripping of reclosure

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The Method for Evaluating the Reclosing Time of Reclosure Based on Lightning Parameters

The Method for Evaluating the Reclosing Time of Reclosure Ba...

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2017 International Conference on Mechanical and Mechatronics Engineering(ICMME2017)

作者： Gun YANG Zhan-qing YU Hong-jun ZHEN Chao SU Shui-ming CHEN Rong ZENG Jin-liang HE State Key Lab.of Control and Simulation of Power Systems and Generation Equipment Department of Electrical EngineeringTsinghua University Qingyuan Power Supply Bureau of Guangdong Grid Company

The fault of transmission line is mostly caused by lightning,and a ground lightning stroke process is often accompanied by multiple *** duration of ground lightning stroke are also *** this paper,a method for evaluating the reclosing time of reclosure based on lightning parameters is *** addition,this paper also gives an expression for the cumulative rate of the duration of ground lightning stroke,and an expression for probability distribution of the amplitude of lightning current in Guangdong *** also proposed a method for calculating the probability of tripping of *** this calculating method,the average probability of tripping of reclosure is less than 1/10000 during a ground lightning stroke process,when the reclosing time t0 is greater than 1.012 s.

关键词： Ground lightning stroke Lightning parameters Reclosing time of reclosure Probability of tripping of reclosure

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Preventive control for combined heat and power system: A day-ahead security constrained economic dispatch model

Preventive control for combined heat and power system: A day...

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The 11th IET International Conference on Advances in power System control, Operation and Management (APSCOM 2018)

作者： Qunli Lin Xinwei Shen Yinliang Xu Yong Sun Zhenyuan Li Qinglai Guo Hongbin Sun Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Institute Tsinghua University Shenzhen China Jilin Power Grid Company State Grid Corp. of China Jilin China State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing China

ISBN: (数字)9781839530043

Integrated Energy System (IES), which plays a vital role in the development of Energy Internet (EI), can improve the efficiency of energy utilization and integration of renewable energy. However, the coupling between multiple energy systems will bring new challenges to the security control of the IES, such as combined heat and power (CHP) system. For IES, the preventive control is the first line of defense to ensure that the system can keep stable operation when contingencies such as the transmission outage or generator outage happen. This paper proposes a preventive control approach for CHP system, in which a day-ahead security constrained economic dispatch (SCED) model of CHP system considering the coupling of heat and electric is formulated. The model aims to minimize the cost of the whole system, while the preventive control of the system can be achieved with the constraints considering the normal states and contingencies states. Case studies based on the IEEE 9-bus system with CHPs are presented to illustrate the approach. The case result shows that the combined electric and heat optimal dispatch is more economical than when two systems are independently optimized and operated. And the proposed preventive control approach of the CHP system can satisfy both the electric and heat demand, and system security is ensured when the N-1 contingencies happened.

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The Research of Asymmetric Parallel Gaps in EHV Transmission Lines

The Research of Asymmetric Parallel Gaps in EHV Transmission...

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2017 2nd International Conference on Electrical and Electronics: Techniques and Applications（EETA2017）

作者： Jin-bo WU Zhan-qing YU Hong-jun ZHEN Chao SU Rong ZENG Jin-liang HE State Key Lab.of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Electric Power Science Institute of Yunnan Power Grid Co. Ltd

As a new kind of lightning protection, parallel gaps have simple structure, easy installation, good economy, and many other advantages. The traditional parallel gap due to the large short distance, can lead to lightning trip-out rate increases. Based on arc movement characteristics this paper presents a design of new type of parallel gaps and the analysis of the surface field strength, and the verification test, design a new kind of parallel gap are obtained.

关键词： Arc movement Parallel gaps Surface electrical field

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The Research of the Insulation Coordination of the Transmission Lines with Parallel Gaps in More Thunderstorm Region

The Research of the Insulation Coordination of the Transmiss...

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2017 International Conference on Mechanical and Mechatronics Engineering(ICMME2017)

作者： Zhu-wen OU Jin-bo WU Hong-jun ZHEN Zhan-qing YU Jin-liang HE Qingyuan Power Supply Bureau of Guangdong Power Grid Co. LTD State Key Lab.of Control and Simulation of Power Systems and Generation Equipment Department of Electrical EngineeringTsinghua University

Parallel gaps,as a new mode of "channel" type lightning protection,can do it with the sub insulator arc distance to effectively protect the insulator,but the corresponding line tripping rate will be affected because of this;Development method based on the leader in this paper the calculation method of the lightning path,the typical used tower of guangzhou trip rate change after the application of parallel gap situation has carried on the analysis,got a short distance and adopt reasonable reinforced insulation,the trip rates did not rise significantly.

关键词： Parallel gaps A lightning strike tripping rate Insulation coordination

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Voltage balance optimisation among subsystems of wind-photovoltaic-ES hybrid generating system

Voltage balance optimisation among subsystems of wind-photov...

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6th International Conference on Renewable power generation

作者： Wu, Han Li, Yan Lu, Zongxiang Tang, Haiyan State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing100084 China North China Electric Power Research Institute Co. Ltd Beijing100045 China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Haidian District Beijing100192 China

Wind-photovoltaic-energy storage (ES) hybrid generating system has numerous reactive power sources. It is crucially important for coordinated control of these reactive power sources. According to the test results, there are unbalanced control problem in subsystem voltage of the hybrid generating system. The problem caused reactive power circulation and loop current. A subsystem voltage balance optimisation strategy is proposed to solve the problem. The case study shows the efficiency of the proposed strategies. © 2017 Institution of Engineering and Technology. All rights reserved.

关键词： Reactive power

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Realization and Application of PSASP-MATlab Associated Mixed Step simulation based on Engine Calling Mode

Realization and Application of PSASP-MATLAB Associated Mixed...

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2017 International Electrical and Energy Conference (CIEEC 2017)

作者： Yiming ZHANG Qinglai GUO Wenlu ZHAO Tian XIA Haoqing XIONG Ran SUN Henan Electric Power Dispatching and Control Center State Grid Corporation of China(SGCC) State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Energy Internet Research Institute Tsinghua University

By calling MATlab calculation engine function library,associated simulation between power System Analysis Software Package(PSASP) and MATlab can be realized in parallel and serial *** could use different timing sequence from PSASP,and mixed step simulation can be *** calculation method was used in a 10-nodes power system case for the modeling and simulation of Automatic Voltage Regulator(AVR),and the correctness of the proposed approach is *** this foundation,the electromechanical transient model of Static Var Generator(SVG) was founded with MATlab/Simulink,and it is of universal applicability and *** inner inverter model can also be used in general grid-connection simulating models of wind power generator,photovoltaic generation,energy storage,***,simulation and analysis for grid-connected wind farm by introducing the SVG model into PSASP were carried out via the proposed associated simulation method above,and the correctness of the model is verified via the calculation *** research results can be used to do assistant analysis for reactive voltage of grid-connected new energy power generation.

关键词： PSASP MATlab engine static var generator reactive voltage mixed step simulation

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Optimization of LNG Terminal Reserve Planning for Combined Gas and Electricity System

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Energy Procedia 2017年 105卷 3332-3338页

作者： Gang Chen Qinzhe Liu En Lu Qixin Chen Guangdong Provincial Electric Power Dispatching Center Yuexiu District Guangzhou Guangdong Province 510600 China State Key Lab of Control and Simulation of Power System and Generation Equipment (Department Electrical Engineering Tsinghua University) Haidian District Beijing 100084 China

Considering the effect of LNG supplying risk on the combined gas and electricity system's operation under the multi-gas-source supply background, the optimization planning model of the combined system's LNG reserve is developed in this paper. The optimization objective of this model is minimizing the annual cost of combined system, considering operation simulation of several typical scenarios along 52 weeks in a whole year and the annualized investment of LNG tanks. The operation objective of each scenario is determined by LNG's arrival and the operation mode of LNG terminals. A test system of IEEE-39 test system and Belgian 20-node system is formulated. The optimal LNG reserve of the test system is solved, and the effect of load level and operation mode on the reserve planning is also analyzed.

关键词： Combined gas and electricity system LNG supply Reserve planning Natural gas system Operation mode

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Optimization of hydrogen yield of a high-temperature electrolysis system with coordinated temperature and feed factors at various loading conditions: a model-based study☆

arXiv

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arXiv 2018年

作者： Xing, Xuetao Lin, Jin Song, Yonghua Hu, Qiang Zhou, You Mu, Shujun State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100084 China Department of Electrical and Computer Engineering University of Macau Macau China Tsinghua-Sichuan Energy Internet Research Institute Chengdu610213 China National Institute of Clean and Low Carbon Energy Beijing102211 China Zhejiang Zhentai Energy Tech. Co. Ltd. Lishui Zhejiang Province321400 China

High-temperature electrolysis (HTE) is a promising technology for achieving high-efficiency power-to-gas, which mitigates the renewable curtailment while promoting decarbonization by transforming wind or solar energy into fuels. Different from low-temperature electrolysis, a considerable amount of the input energy is consumed by auxiliary equipment in an HTE system for maintaining the temperature, so the studies on systematic energy description and parameter optimization of HTE are essentially required. A few published studies investigated HTE’s systematic optimization based on simulation, yet there is not a commonly used analytical optimization model which is more suitable for integration with power grid. To fill in this blank, a concise analytical operation model is proposed in this paper to coordinate the necessary power consumptions of auxiliaries under various loading conditions of an HTE system. First, this paper develops a comprehensive energy flow model for an HTE system based on the fundamentals extracted from the existing work, providing a quantitative description of the impacts of condition parameters, including the temperature and the feedstock flow rates. A concise operation model is then analytically proposed to search for the optimal operating states that maximize the hydrogen yield while meeting the desired system loading power by coordinating the temperature, the feedstock flows and the electrolysis current. The evaluation of system performance and the consideration of constraints caused by energy balances and necessary stack requirements are both included. In addition, analytical optimality conditions are obtained to locate the optimal operating states without performing nonlinear programming by further investigating the optimization method. In the case study, a numerical case of an HTE system is employed to validate the proposed operation model and optimization method, which proves that the proposed operation strategies not only improve the overal

关键词： Hydrogen production

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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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