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2nd IET Renewable power Generation Conference (RPG 2013)

作者： Hanchen Xu Zhichang Yuan Chao Lu Can Wang Haifeng Guo Yongxing Li State Key Laboratory of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing 100084 China China Southern Power Grid Power Generation Company Guangzhou 510630 China

Advanced applications of energy storage system comprise load shifting, isolated island operation, frequency regulation and reactive support, etc. There are already algorithms and control strategies for advanced applications, but still lack an independent supporting software platform. This paper concentrates on the structure and realization of software platform for advanced application of large-scale energy storage system, including demand analysis, software architecture and module design, user interface and functionality development. An easy to operate and expand software platform, with a beautiful graphical user interface and support for visualization of data, was designed and implemented.

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Automatic voltage control for ultra-high voltage AC neighboring grids

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Dianli Xitong Zidonghua/Automation of Electric power systems 2013年第21期37卷 99-105页

作者： Wang, Bin Guo, Qinglai Sun, Hongbin Tang, Lei Zhang, Boming Wu, Wenchuan Department of Electrical Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing 100084 China

The connection of ultra-high voltage (UHV) transmission line has brought a challenge to the voltage operation and control of its neighboring power system. Facing engineering practice, this paper proposes an automatic voltage control (AVC) method for the UHV neighboring grids. The reactive voltage operation and control characteristics of UHV neighboring grids are analyzed, including the tremendous impact of UHV active power flow change on the bus voltage in UHV neighboring grids, the large voltage fluctuation, and the tight coupling among power plants and substations, etc. The smart voltage optimal control technology is proposed and implemented by taking into consideration these characteristics and the coordinated control among tightly coupled power plants and substations in the UHV neighboring grids. This method can reduce the irrational reactive power flow and bypass the unnecessary discrete device action, while ensuring voltage security. The proposed method is put into closed-loop field operation in China for its validated efficiency and practicability. ©2013 state Grid Electric power Research Institute Press.

关键词： Smart power grids

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The estimate of influence of drainage pipe network operation on influent of WWTP

The estimate of influence of drainage pipe network operation...

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International Conference on Pipelines and Trenchless Technology, ICPTT 2013

作者： Liu, Yanchen Qiu, Yong Jing, He Shi, Hanchang Li, Ji He, Renjie State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China School of Environmental and Civil Engineering Jiangnan Universtiy Wuxi 214000 China Wuxi Municipal Sewer System Company Wuxi 214000 China

ISBN: (纸本)9780784413142

The drainage pipe network plays a very important role that take on the collection and transportation of wastewater in sewer system. The well status of drainage pipe network is necessary to guarantee for the better operation efficiency of wastewater treatment plant. The study aims at the estimate the influence of drainage pipe network operation status on the influent of wastewater treatment plant(WWTP). The long-term and short-term and shock effect were investigated in the study. The result indicated that the influent wastewater component variation is obviously by the year and season rule in the long-term effect. The daily variation rule of wastewater quality and quantity is significant in the short-term *** shork effect is significant and the flow variation caused by rainfall became weak normally after 2-3 day of rain event. © ASCE 2013.

关键词： Rain

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An Adaptive Linear Element Based Method for Identification of Linear Parameter Varying Models

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IFAC Proceedings Volumes 2013年第20期46卷 309-314页

作者： Fei Ye Yong Sun Qinmin Yang State Key Laboratory of Industrial Control Technology Department of Control Science and Engineering Zhejiang University Hangzhou 310027 China Zhejiang Windey Co. Ltd and the State Key Laboratory of Wind Power System Zhejiang Hangzhou 310012 China

This paper is concerned with the identification of nonlinear processes which are parameterized as linear parameter varying (LPV) models. The LPV models are represented as blended linear models by using ADAptive LINear Element (ADALINE) structure. Firstly, ADALINE is employed to represent local models describing the system's behaviour at each fixed working point. Then, a novel method is proposed to estimate parameters of weight functions such that the global LPV model can be built by interpolating the local ones. The adaptation algorithm is discussed and extensive simulation studies are conducted to verify the effectiveness of this method.

关键词： system identification LPV models ADALINE Input/output Weight functions

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A Multi-Period Multi-Region Optimization Model of China's power Sector Considering Synergetic CO 2 and Air Pollutants control

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Procedia Environmental Sciences 2013年 18卷 397-403页

作者： Minhua Ye Wenjia Cai Can Wang State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) and School of Environment Tsinghua University Beijing 100084 China Minstry of Education Key Laboratory for Earth System Modelling and the Center for Earth System Science Tsinghua University Beijing 100084 China

China will soon be under the pressure of controlling the emissions of CO2 and various air pollutants simultaneously. power sector as the largest contributor is the key sector to fulfill this task, which makes a power sector model with consideration of multiple air emissions control in great need for supporting policy making. This study built a multi- period optimization model for China s power sector with considerations of SO2, NOX and CO2 emission control and accounting of Hg emissions, based on six regional power grids with growing inter-connections. A case study of technology development and emission trends in China s power sector between 2010 and 2030 follows, using regional technology and fuel data in 2010, and advices for further model development come last.

关键词： optimization model CO 2 SO 2 NO X Hg regional power grids emission mitigation carbon intensity

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Full-state Feedback Linearization and Backstepping control of Nonlinear Markovian Jump systems

Full-State Feedback Linearization and Backstepping Control o...

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第三十二届中国控制会议

作者： Zhongwei Lin Jizhen Liu Yuguang Niu Wei Wang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer EngineeringNorth China Electric Power University

ISBN: (纸本)9781479900305

This paper investigates the full-state feedback lineaxization and backstepping control design problems for a class of nonlinear Markovian jump *** to the proposed relative degree set definition,the system can be transformed into the canonical form through the appropriate coordinate changes following with the Markovian switchings,i.e.,the system can be full-state feedback linearized in every jnmp mode with respect to the relative degree set {n,...,n}.Then,a stabilizing control is designed through applying the backstepping technique,which guarantees the asymptotically stability of nonlinear Markovian jump systems.

关键词： Markovian jump system Nonlinear system Stabilization Backstepping control

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Estimation of the electromechanical characteristics of power systems based on a revised stochastic subspace method and the stabilization diagram

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Science China(Technological Sciences) 2012年第6期55卷 1677-1687页

作者： NI JingMin SHEN Chen LIU Feng State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Beijing 100084China

Estimating low-frequency oscillation modes and the corresponding mode shapes based on ambient data from WAMS measurements has a promising prospect in power system analysis and *** on the stochastic subspace method,this paper proposes a revised stochastic subspace method by introducing reference channels,which can estimate the modes and the mode shapes simultaneously with great computational ***,the accuracy of the estimated results is not *** discriminate the real modes from the spurious ones,the stabilization diagram is introduced.A novel algorithm is designed to deal with the stabilization diagram which can detect the real modes *** conducted on the IEEE-118 system indicate that the proposed method has good performance in terms of both computational efficiency and accuracy,and has the potential of being used on-line.

关键词： electromechanical oscillation ambient data stochastic subspace method reference channels stabilization diagram

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Risk evaluation method of electric power communication network

Risk evaluation method of electric power communication netwo...

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International Conference on Natural Computation (ICNC)

作者： Kangming Jiang Ying Zeng Boren Deng Liangrui Tang Power dispatch and control Center of Guangdong Power Grid Corp Guangzhou China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China

ISBN: (纸本)9781467347129

For the monotony of the traditional risk evaluation method of electric power communication network, a comprehensive method for evaluating risk of electric power communication network is provided. Starting from the analysis of the operational services, risk status of each link in the network is obtained. Then the link weights are calculated by means of analyzing the importance of link to network from the perspective of topology. Lastly, two risk evaluation indicators which are network risk and degree of risk balancing of network can be calculated by combining link risk and link weight. The comprehensive method for evaluating risk of electric power communication network is more comprehensive and ocular in the analysis of operational risks and risk distribution, and has practical significance and extensive application prospects in risk management.

关键词： Communication networks Security Network topology Topology power system reliability Reliability

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A new robust identification method for Xq of synchronous generator with steady-state PMU data

A new robust identification method for Xq of synchronous gen...

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IEEE General Meeting power& Energy Society

作者： Ancheng Xue Junli Zhang Tianshu Bi Shi Chen Wei Tang Shijun Hu State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China Electrical Power Company of Anhui Province Electrical Power Dispatching & Control Center of Anhui Hefei Anhui China

This paper proposes a robust on-line identification method for the synchronous generator's quadrature-axis synchronous reactance Xq with steady-state PMU (Phasor Measurement Unit) data. Firstly, the mathematical formulation for identification of Xq, which is a least square estimation with the objective of terminal voltage fiting is introduced. And then, the robust Huber estimation, which can eliminate the effects of gross errors among measured data, is presented. Furthermore, the Huber estimation is applied to identification for Xq by modifying its objective function. simulation results with PSASP data verify the high accuracy and robustness of the proposed method in different situations. Moreover, simulation results with the field data of a 667-MVA generator show the effectiveness of the proposed approaches.

关键词： Synchronous generators Phasor measurement units Robustness Estimation Parameter estimation Steady-state

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Real-time electromagnetic transient simulation algorithm for integrated power systems based on network level and component level parallelism

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Science China(Technological Sciences) 2012年第11期55卷 3232-3241页

作者： CHEN LaiJun CHEN Ying MEI ShengWei State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments(Department of Electrical Engineering Tsinghua University)Beijing 100084China

The analysis and simulation of power system are becoming more and more challenging as the complexity of system topology and components has been increased. In this paper, a hybrid parallel algorithm is proposed for the real-time electromagnetic transient simulation （EMTS） of integrated power systems containing multiphase machines. The proposed algorithm is com- posed of a novel network partition method called component level parallelization and the Multi-Area Thevenin Equivalent （MATE） method, which extends the flexibility of the network partition in parallel simulation. Moreover, several methods are developed to enhance the efficiency of the communication and computation. power systems with up to 410 single-phase elec- trical nodes and 336 switches are simulated in a time step of 50 ~ts to validate the proposed algorithm.

关键词： EMTP multiphase machine network partition parallel computing power system real-time simulation

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