检索结果-内蒙古大学图书馆

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

来源：评论

学校读者我要写书评

暂无评论

Economic analysis of multi-energy virtual power plant considering market information

Economic analysis of multi-energy virtual power plant consid...

引用

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

作者： Wang, Jiazhen Shen, Xinwei Guo, Qinglai Xiong, Wen Tang, Lei Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Insitute 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 Lei Tang Beijing Qingda Gaoke System Control Company Beijing China Beijing Qingda Gaoke System Control Company Beijing China

ISBN: (纸本)9781538614273

Integrated Energy system is beneficial for promoting the distributed renewable energy (DRE) consumption, thereby alleviating environmental pollution and energy shortage. In this paper, we propose a virtual power plant (VPP) structure considering the feature of heat and electric power system integration, which is defined as Multi-energy Virtual power Plant (MVPP). MVPP is allowed to participate in the electricity market;and price information from bulk power market can affect heating system through the coupling devices, thus optimizing the co-operation of electric and heat system. MVPP is also involved in the auxiliary service market, a penalty term is designed for the Utility to charge MVPP service fee so that power fluctuation on transmission line can be reduced. The case study proved the effectiveness of the penalty term and MVPP is able to provide reserve service for Utility in peak load hours by multi-energy flow coupling under the regulation of feed-in tariff. © 2017 IEEE.

关键词： Virtual power Plants

来源：评论

学校读者我要写书评

暂无评论

The ac side fault characteristics and protection scheme of the unified power flow controller based on MMC 12

The ac side fault characteristics and protection scheme of t...

引用

12th IET International Conference on AC and DC power Transmission, ACDC 2016

作者： Zheng, Tao Wu, Dan Wang, Ketan Zeng, Hongtao Qi, Huanhuan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources China State Grid Smart Grid Research Institute China

ISBN: (纸本)9781785612268

The Unified power Flow Controller (UPFC) based on Modular Multilevel Converter (MMC) is one of the highly controllable flexible AC transmission system devices, which is more suitable for high-voltage and large-capacity transmission fields. The main circuit topology and operating principles of MMC-UPFC is presented in this paper. The fault characteristics of several typical faults and detailed protection configuration of AC side of MMC-UPFC are analyzed, considering the influence of valve control and protection. Along with discussing the overall AC side protective schemes, the focus of this paper has placed on the valve side AC bus differential protection, T-line differential protection and the series interfaced transformer differential protection. The simulation by RTDS is carried out and shows that the proposed protection scheme is feasible.

关键词： Electric load flow

来源：评论

学校读者我要写书评

暂无评论

Modelling and control of doubly fed variable-speed pumped storage units for grid power regulation

引用

The Journal of Engineering 2017年第13期2017卷 745-750页

作者： Zhao Guopeng Zhao Qiang Ren Jiyun Song Xiaofang Han Minxiao State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 People's Republic of China School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 People's Republic of China State Key Laboratory of Smart Grid Protection and Control Nanjing 211006 Jiangsu Province People's Republic of China

With the expending scale of the power grid and the substantial development of renewable energy generation system, the demand for power quality is becoming more and more significant. The doubly fed pumped storage can be an effective method to control the power of the power grid and restrain the power grid fluctuation caused by renewable energy generation. First, this study introduces the structure of doubly fed pumped storage unit, and analyses the mathematical model of reversible hydraulic pump turbine, doubly fed induction generator (DFIG) and control strategy of the converter. On the basis of the model of reversible hydraulic pump turbine and DFIG, control strategies of the dq decoupling and synchronous rotating coordinate system are studied to output the active and reactive power. Second, the models of generating mode and pumping mode for the doubly fed pumped storage unit are established. Third, for the grid power regulation, active power and speed control strategy in generating mode, pumping mode are put forward. Finally, the model of doubly fed pumped storage unit of 300 MW is established in MATLAB/Simulink. The proposed control strategy is verified by the simulation results.

关键词： wind power plants machine control pumped-storage power stations velocity control asynchronous generators power generation control pumps power grids pumping mode doubly fed pumped storage unit grid power regulation active power speed control strategy renewable energy generation system power quality power grid fluctuation reversible hydraulic pump turbine output reactive powers

来源：评论

学校读者我要写书评

暂无评论

Unit Commitment Considering Demand Response Behavior Based on Utility Maximization

Unit Commitment Considering Demand Response Behavior Based o...

引用

IEEE Conference on Energy Internet and Energy system Integration

作者： Yumin Zhang Xueshan Han Bo Xu Li Zhang Donglei Sun Xiaofeng Miao Jiayin Jiang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment (Department of Electrical Engineering Tsinghua University) Economic & Technology Research Institute of State Grid Shandong Electric Power Company State Grid Shandong Electric Power Company Yantai Electric Power Company

ISBN: (纸本)9781538614280

The active participation of demand side resources in power grid operation not only benefits the individual participant but also benefits the whole system. The optimal goal can promote by excavating the active behaviors of demand side. The welfare maximization of market participant is the driving force of such active behaviors. Considering the independence of each user's behavior, the consumer's utility function is selected to depict consumer's preference and demand response behavior. In order to coordinate the consumers' maximum welfare with social welfare maximization, consumers' utility function and units' operation cost are integrated into Unit Commitment (UC) model. The objective function is to maximize social welfare, by subtracting units' operation cost from consumers' total utility, and this objective can be acquired. Considering the proposed model should be solved in a distributed manner, the idea of the centralized coordination and the decentralized decision-making is proposed. Based on the Lagrangian relaxation (LR) principle and distributed real-time pricing scheme, a closed-loop feedback mechanism is constructed to reflect the relationship among generator output, price level, and load demand. The ten generating units example can illustrate the effectiveness of the proposed method.

关键词： Demand utility Decomposition coordination Electricity market Lagrangian relaxation Real-time pricing Unit commitment

来源：评论

学校读者我要写书评

暂无评论

Automatic voltage control of wind farms based on model predictive control theory

引用

Dianli Xitong Zidonghua/Automation of Electric power systems 2015年第7期39卷 59-67页

作者： Xu, Fengda Guo, Qinglai Sun, Hongbin Lan, Haibo Liu, Haitao Liu, Xiaomin Department of Electrical Engineering Tsinghua University Beijing100084 China State Key Laboratory of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing100084 China State Grid North Hebei Grid Company Limited Beijing100053 China

Voltage fluctuations occur frequently in wind farms as a result of wind power perturbation, while reactive power control of various devices is always uncoordinated and often has a time lag when the system operates in the traditional control mode that only uses the current data for decision-making. In this case, a method for coordinated control of the reactive power of wind turbine generators (WTGs) and static var generators is proposed based on model predictive control (MPC). Unlike the traditional voltage control method, the control method proposed has the realization of optimization of the voltage control curve and the dynamic process of reactive power regulation in the future window of time as its objective. An auto regression moving average (ARMA) model is used to predict the active power of WTGs while the reactive power of WTGs and the SVG is forecasted using a first-order inertia link and a proportional integral (PI) link, respectively. Voltages in the wind farm are solved with the help of a sensitivity matrix. Thus an optimization model is developed for both the minimization of PCC voltage deviation and the maximization of SVG reactive power reservation in a future window of time. The optimizing model is solved using CPLEX tools with the dual simplex algorithm. In order to test the performance of the MPC controller, multiple cases with different wind circumstances are simulated on a DIgSILENT platform. simulation results reveal that by predicting the states of various instruments in wind farms during a period of time in the future, the proposed control method is able to rationally arrange fast/slow reactive power to respond to predictable changes of the system in advance and keep voltage stable. ©2015 State grid Electric power Research Institute Press

关键词： Reactive power

来源：评论

学校读者我要写书评

暂无评论

A real-time wind power control method for power systems with high wind power penetration and its implementation

引用

Dianli Xitong Zidonghua/Automation of Electric power systems 2015年第21期39卷 23-29页

作者： Wang, Bin Sun, Yong Wu, Wenchuan Zheng, Taiyi Zhang, Boming State Key Laboratory of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing100084 China Department of Electrical Engineering Tsinghua University Beijing100084 China State Grid Jilin Electric Power Supply Company Changchun130021 China

A real-time wind power control method is proposed to accommodate the severe fluctuation of wind power, which can be used in power systems with high wind power penetration. The maximum allowable wind power generation is estimated online according to the automatic generation control (AGC) downward spinning reserve and the tie-line power deviation. Considering the different priorities for wind farms and the transmission security constraints, different control strategies, such as corrective control to eliminate the transmission congestion, optimal dispatch considering the trade-off between minimum curtailment of wind power and the fairness among wind farms, are integrated in the proposed method. The numerical simulation on the test system and the results of field operation in a provincial power grid show that the method is efficient and practical. © 2015 Automation of Electric power systems Press.

关键词： Wind farm

来源：评论

学校读者我要写书评

暂无评论

Quantitative analysis of voltage distribution within ±1100kv HVDC converter valve tower under various triasient over-voltage conditions

Quantitative analysis of voltage distribution within ±1100k...

引用

2014 International Conference on Lightning Protection, ICLP 2014

作者： Liu, Chen-Long Shuai, Qi Qi, Lei Cui, Xiang Fang, Chao Wei, Xiaoguang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China State Grid Smart Grid Institute China EPRI Electric Power Engineering Company Limited Beijing102200 China

ISBN: (纸本)9781479935444

As is widely recognized, lightning has always been a threatening factor for power system. Consequently, the protection against lightning must be taken into consideration when new technologies are introduced to the power system. Besides, with the ability to transmit high voltage, large capacity power stably over a long distance, High Voltage Direct Current (HVDC) systems have become an important part of the strong smart grid of China. As the core equipment of HVDC converter station, the thyristor valve will be exposed to different kinds of overvoltage originating in the AC and DC systems. The safety and reliability of the power systems depends on the capacity to withstand overvoltage of thyristor valve on a great extent. In this paper, choosing ±1100 kV DC converter valve tower as the research object, under the overvoltage insulation testing conditions, a simulation model is established, a new kind of analysis algorithm is put forward and authenticated, the over-voltage analysis is accomplished. Based on the detailed physical structure of converter valve, broadband circuit modeling of ±1100 kV thyristor modules and capacitance parameter, an overvoltage analysis model of ±1100 kV DC converter valve tower is established. After that, a new method of converter valve tower overvoltage analysis has been put forward, which could avoid the deficiencies of the existing research methods effectively. On the basis of the previous work, the non-uniform coefficient concept is introduced to analyze overvoltage in valve tower. Through numerous calculations, the voltage distribution characteristics of the key device in the converter valve are gained when the converter valve is exposed to lightning overvoltage and fast front overvoltage. Besides, the quantitative analysis of influencing factors of the voltage distribution non-uniform coefficient is also presented in the paper. © 2014 IEEE.

关键词： Capacitance

来源：评论

学校读者我要写书评

暂无评论

Design of grounding system for wind-photovoltaic-energy storage Hybrid power station 4

Design of grounding system for wind-photovoltaic-energy stor...

引用

2014 4th International Conference on High Voltage Engineering and Application, ICHVE 2014

作者： Lin, Cheng Sen, Wang Zhizhong, Li Jing, Wang Bo, Zhang Weidong, Shi Power Grid Grounding Engineering Laboratory of State Grid Corporation of China Xi'an Shaanxi710049 China State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing100084 China China Electric Power Research Institute Beijing100192 China

ISBN: (纸本)9781479966134

Based on the Chinese demonstration project of Zhangbei wind-photovoltaic-energy storage (W-PV-ES) hybrid generation, which is the world's biggest and Chinese first new energy utilization platform, the design of grounding system for W-PV-ES Hybrid power station was studied in this paper. Firstly according to the soil resistivity of that power station, measured by the Wenner four-electrode method, the soil constitution, that is three-level layer in summer and is four-level layer including an 1.5m high and 2000·m permafrost in winter, was got, and grounding grid models of W-PV-ES hybrid generation was studied. Then grounding system of that W-PV-ES station was designed, that was the single wind turbine uses concentric bicyclic earth electrode, whose radius are 7m and 10m, and the PV-ES power station uses one horizontal earth electrode every 10m in one direction, every 50m in another direction, and there are 2.5m long vertical grounding rods every 10m around the PV-ES station. For the substation, we adopt the horizontal grounding grid with a 10m interval between conductors and 0.8m burial depth. On the condition that earth current is 10KA, the earth's surface potential, contact potential, and step potential were simulated. After that safety of 35kV system and secondary system were analyzed, when there was short trouble. Finally influence on earth resistance by different grounding materials was studied, galvanized flat steel and copper material was presented as two kinds of selection schemes of grounding materials for considering economic considerations. © 2014 IEEE.

关键词： Energy storage

来源：评论

学校读者我要写书评

暂无评论

The design and measurement of test system for dynamic characteristics of IGBT

The design and measurement of test system for dynamic charac...

引用

International Conference on power system Technology (powerCON)

作者： Kaikai Zou Lei Qi Xiang Cui Guoliang Zhao Bo Zong Department of State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China Department of State Grid Smart Grid Research Institute Beijing China

ISBN: (纸本)9781479950331

With the fast development of power electronic technology, voltage source converter based on IGBT have been widely used in the field of high voltage direct current (HVDC) and IGBT are more and more widely utilized. So, Studying on the characteristics of IGBT is more and more important. The static characteristic of IGBT can be got from the Datasheet, but the dynamic characteristic must be got by experiment. So, How to get the accurate waveform of the dynamic characteristic is significant. In this paper, How to design the test circuit based on double-pulse method is proposed, also how to decide all the parameters in the circuit and how it work are elaborated deeply. We focus on some important factors, such as the oscillation frequency of the LC loop, the time constant of load inductance during discharging, the change rate of the bus voltage. Then, an experimental platform has been built for FF450R17ME4 IGBT module of Infineon. On the basis of experimental platform, We analyze the key problems in the measurement of dynamic characteristics by theoretical analysis and experimental verification, such as, the waveform of Vce, Ic during the whole experimental period. The comparison of several ways to measuring voltage and current is given. In order to exclude the electromagnetic interference, eliminate the matching influence of the measuring probe and ensure the waveform is accurate, A shielding box is used and we analyze the influencing factor one by one through experiment. Then, the standard measurement is given ultimately.

关键词： Probes Insulated gate bipolar transistors Voltage measurement Capacitors Current measurement power system dynamics Capacitance

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：