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Zonal Reserve Model for Renewable Power Integrated System

Energy Procedia 2016年 103卷 177-182页

作者： Fan Liu Shiyu Liu Yinguo Yang Yanwei Wang Tao Ding Zhaohong Bie State Key Laboratory of Electrical Insulation and Power Equipment Smart Grid Key Laboratory of Shaanxi Province Xi’an Jiaotong University Xi’an 710049 China Power Dispatch Control Centre of Guangdong Power Grid Corp.Ltd 510000 China

Considering transmission capabilities and renewable integration, zonal regulation and spinning reserve requirements are discussed to handle uncertainty of load and renewable energy as well as any N-1 outage. A new zonal reserve model is proposed in the paper including reserve dispatched time constraints, zonal reserve requirements and network security constraints using the method of chance constrained programming. Analysis on the IEEE 39 system demonstrates the model can schedule zonal energy, regulation and spinning reserve in an economic way for a renewable power integrated system.

关键词： Reserve optimization Zonal reserve requirements Load uncertainty Renewable uncertainty N-1 outage

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An analytic method of calculating rotor and stator short-circuit current of DFIG with RSC control

An analytic method of calculating rotor and stator short-cir...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Jinhua Zhang Baohui Zhang Bingqing Wu Jin Wang Shaanxi Key Laboratory of Smart Grid Xi'an Jiaotong University Xi'an China Electric Power Dispatching and Control Center State Grid Shandong Electric Power Company Jinan China

ISBN: (纸本)9781509054190

To investigate the fault features of doubly-fed induction generator (DFIG) with rotor side converter (RSC) control, an analytic method of calculating the DFIG short-circuit current is proposed in this paper. Based on the space vector model of DFIG with RSC control, the dynamic equation of rotor current reflecting both the machine transient process and the impact of RSC control is derived, and analytic expressions of rotor and stator fault current in time-domain are obtained. The calculation result is certified by being compared with the PSCAD simulation result. According to the derived analytic expressions, the components of the DFIG short-circuit current are analyzed. It indicates that the machine terminal voltage dip of DFIG, the current reference value, the orientation angle, and the proportional-integral value of RSC controller are main factors influencing the short-circuit current characteristics.

关键词： Damping Indexes Power grids Frequency control Time-frequency analysis Stators

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Low-Carbon Economic Dispatch considering carbon capture unit and demand response under carbon trading

Low-Carbon Economic Dispatch considering carbon capture unit...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Renjun Zhou Yishu Li Jiagan Sun Hao Zhang Duli Liu Smart Grids Operation and Control Key Laboratory Changsha University of Science & Technology Changsha Hunan China State Grid Chongqing Changshou Power Company Chongqing China

ISBN: (纸本)9781509054190

The power system needs to coordinate the economic dispatch and the carbon emission under the carbon market. The CO 2 emission characteristics of different generation resources arc analyzed, then generation resources are divided into three categories: high , low and zero carbon emission. Considering the carbon capture unit and the demand response, the Low-Carbon Economic Dispatch model is established with carbon trading cost included in the objective function. To take the uncertainty of carbon price caused by multiple uncertain factors into consideration, a new low-carbon economic dispatch model is built, which uses Conditional Value-at-Risk(CVaR) method to recalculate the carbon trading cost. The YALMIP software is applied to solve the proposed model. The case studies show that low-carbon economic dispatch can improve the utilization of low-carbon and zero-carbon generation resources under carbon trading framework and the dispatch results are affected by the changes of carbon price greatly. Furthermore, with confidence level of carbon price uncertainty rising, the dispatch costs and carbon emissions increase accordingly.

关键词： Carbon dioxide Carbon Load management Economics Uncertainty Energy consumption Dispatching

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Production simulation of power systems considering the forecast error of renewable energy

Production simulation of power systems considering the forec...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Kun Ding Ningbo Wang Haipeng Xie Zhaohong Bie Laboratory of Wind Power Integration Operation and Control Gansu Electric Power Corporation Wind Power Technology Center Lanzhou China State Key Laboratory of Electrical Insulation and Power Equipment & Smart Grid Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9781509054190

A short-term stochastic production simulation method considering the forecast error of renewable sources power is proposed to focus on the issue that conventional production simulation method is incapable of depicting the forecast error of renewable sources power. The proposed method contains two hierarchies, i.e. the day-ahead simulation and the real-time simulation. As for day-ahead simulation, a day-ahead scheduling of conventional units and renewable energy plants is determined by solving a unit commitment model on the basis of forecasted renewable sources power and load profiles. Real-time simulation is the supplement to day-ahead simulation and it corrects the results in day-ahead simulation. The validity of the proposed method is proved with a real power grid in Northwest China. Case studies show that conventional units may be still the major resource of power grids although these installed capacity is no larger than renewable energy resources. Meanwhile, forecast errors actually impact reliability of power systems.

关键词： Load modeling Renewable energy sources Production Autoregressive processes Predictive models Power grids

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A software safety assessment method based on the combination of frequency analysis method and analytic hierarchy process

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AIP Conference Proceedings 2017年第1期1839卷

作者： Kehe Wu Jiahui Wei Haifeng Zhang Yingzhe Huo 1School of Control and Computer Engineering North China Electric Power University Beijing 102206 China 2State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing 100192 China 3Beijing Engineering Research Center of High-reliability IC with Power Industrial Grade Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing 100192 China 4State Grid Liaoning Information and Communication Company Shenyang 110016 China

The aim of software safety assessment is to evaluate whether the software meets the safety requirements, and this measurement is very important to ensure and confirm the software safety. This paper presents a new software safety assessment method that is based on the combination of frequency analysis and Analytic Hierarchy Process. First, use frequency analysis method to select some appropriate assessment indicators; then use the Analytic Hierarchy Process to construct the assessment system and assign suitable weight values to indicators at all layers of system; finally rate the software safety. Through the example analysis, it is proved that this method can evaluate software safety very well.

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Advanced control strategy of SVC based on artificial immune algorithm

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Journal of Computational Information Systems 2015年第6期11卷 1965-1972页

作者： Chen, Saisai Li, Kejun Jing, Ping Zha, Guoliang Tian, Xin Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Smart Grid Research Institute of State-Grid Changping District Beijing China

For the conventional Static Var Compensator (SVC), there is a contradiction between the response time and system stability. An advanced control strategy is proposed in this paper. Improved Proportional Integral (PI) controller and Artificial Immune Algorithm are adopted in SVC control system, with the response speed of SVC as objective function of optimization. Meanwhile, a non-linear link is added to ensure the stability of the system. The non-linear link is proved that it can significantly improve the stability of the nonlinear system. Simulation results show that the new SVC control strategy can not only track the set voltage value of SVC quickly, but also comprehensively compensate for reactive power and three-phase imbalance. Copyright © 2015 Binary Information Press.

关键词： Static Var compensators

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A risk assessment approach on electrical substation for dispatching operation

A risk assessment approach on electrical substation for disp...

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IEEE Region 10 International Conference TENCON

作者： Guangmin Fan Lingxu Guo Wei Liang Hongtao Qie Dongxu Lu Kai Hou Yuan Zeng Dispatching and Control Center State Grid Tianjin Electric Power Company Tianjin China Dispatching and Control Center State Grid Tianjin Electric Power Company China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China Tianjin University Tianjin Tianjin CN

ISBN: (纸本)9781479986422

Based on the fact about self-regions in current power system, a new topology regions method is firstly proposed. Then a new comprehensive risk assessment method on electrical substation for dispatching operation is presented, in which the risk of bus system arrangement and equipment operation state within a substation and the overall topology of a substation during a whole power system are all considered. Finally, the correctness and effectiveness of this method are tested by the utilization in a real power system.

关键词： Substations Topology Risk management Load flow Satellites Power system stability Dispatching

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Design and experimental results of a DC induction heater prototype for aluminum billets

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IEEE Transactions on Applied Superconductivity 2014年第3期24卷 1-4页

作者： Yang, J. Gao, H. Wang, Y.W. Xu, D.Q. Hong, Z. Jin, Z. Li, Z.Y. Key Laboratory of Control of Power Transmission and Conversion Ministry of Education State Energy Smart Grid R and D Center Shanghai Jiao Tong University Shanghai200240 China

The advantages of dc induction heating in high efficiency and good heating quality have been proved and studied worldwide in past decades. In this paper, a laboratory-scale dc induction heater with iron yoke for aluminum billets is designed and tested in detail. The billet to be heated is placed in the air gap of the yoke and is driven by a motor. The magnetic field in the gap is built up by copper windings with direct currents. The whole heating processes under different conditions are observed. Various surface temperature distributions have been achieved by changing several heating parameters including heating time, rotating speed, and dc magnetic field. Numerical analysis for calculating the heating process is also carried out in a commercial finite-element software. Results show that all the heating parameters will affect the final heating effects. Also, the numerical results agree well with the experimental results. © 2013 IEEE.

关键词： Finite element method

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A distributed feeder automation algorithm and its model checking

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Sensors and Transducers 2014年第1期162卷 325-332页

作者： Ling, Wanshui Liu, Dong Key Laboratory of Control of Power Transmission and Conversion Ministry of Education School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China State Energy Smart Grid R and D Center Shanghai 200240 China

This paper presents a distributed feeder automation algorithm based on local topology, considering switch action failure, communication failures and other confounding factors. This makes higher efficiency of data processing and communication and better maintainability of distribution automation system. The algorithm is described by using PROMELA. And the correctness and security of algorithm are expressed and examined with model checking methods. The results show that the algorithm is correct under conditions of certainty and safe under conditions of uncertainty. © 2014 IFSA Publishing, S. L.

关键词： Model checking

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The gradual optimization of grounding grip corrosion rate forecasting model

The gradual optimization of grounding grip corrosion rate fo...

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2nd International Conference on Materials Engineering and Automatic control, ICMEAC 2013

作者： Yan, Ai Jun Du, Jing Yi Liu, Rui Li, Na Tang, Xiao Hua Liu, Lei Li, Zhi Zong The Ground Engineering Laboratory State Grid Company Shaanxi Power Academy of Sciences Xi'an 71005 China The Key Laboratory of Corrosion and Protection Materials Science and Engineering College Xi'an University of Technology Xi'an 710048 China College of Electrical and Control Engineering Xi'an University of Science and Technology Xi'an 710054 China

ISBN: (纸本)9783037857250

A forecasting model of the gradual optimization algorithm is established to predict substation grounding grip corrosion rate. In this model, according to the "Over Fitting" phenomenon in the neural network limited soil corrosion sample data are randomly combined and the training stops when the training error and validation error are equal. The model of smaller errors will be chosen as the optimal model. As shown in the simulation, the general performance and fitting accuracy from the forecasting model meet requirements. © (2013) Trans Tech Publications, Switzerland.

关键词： Corrosion rate

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