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检索条件"机构=Key Laboratory of Power System Protection and Dynamic Monitoring and Control"

共 605 条记录，以下是221-230 订阅

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A Novel Low Harmonic dynamic Static Var Compensator Resaerch

A Novel Low Harmonic Dynamic Static Var Compensator Resaerch

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Renzhong Shan Zhongdong Yin Xiangning Xiao Key Laboratory of Power System Protection and Dynamic Monitoring and Control under Ministry of Education North China Electric Power University Beijing China 102206

ISBN: (纸本)9781424427994

A novel SVC topology is proposed in this paper, firstly a multi-winding transformer is adopt to realize 12 ripple, secondly the 5th harmonic filter on system bus as the fundamental reactive power compensation, and control thyristor controlled reactor (TCR) to realize inflow system reactive power, thirdly modularization design is adopted, according to the compensation reactive power only one TCR module is phase controlled. Finally, the experimental result shows that the novel TCR without an additional filter has the advantages of low harmonic, good static and dynamic performance, small volume and etc, compared to traditional TCR.

关键词： Reactive power Var compensation Thyristor controlled reactor Harmonic current 12 ripples Modularization

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Approach on performance evaluation and index selection for electricity distribution utilities

Approach on performance evaluation and index selection for e...

引用

IEEE General Meeting power& Energy Society

作者： Ming Zhou Weijun Zhai Gengyin Li Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

Establishing an effective performance evaluation method and market driven incentive mechanism is an important subject that the electric power utilities are currently facing with. By aid of Data Envelopment Analysis (DEA) method which is widely used in other industries' performance evaluation, three DEA based models are proposed to evaluate electricity distribution utilities' performances, the relative efficiency scores are then given. In addition, the improvement schemes are presented for those relative less efficient utilities. At last, an approach of sensitivity analysis with respect to evaluation indices and a method to simplify evaluation indices are presented. The empirical study shows that the proposed performance evaluation method for electricity distribution utilities is effective and straightforward.

关键词： Data envelopment analysis Performance evaluation Sensitivity analysis power system analysis computing Monopoly power system management power system economics power generation economics Regulators Logistics

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Fault Diagnosis Based on BFS in Electric power system

Fault Diagnosis Based on BFS in Electric Power System

引用

International Conference on Measuring Technology and Mechatronics Automation, ICMTMA

作者： Yagang Zhang Jinfang Zhang Jing Ma Zengping Wang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding China

In this paper, we adopt a novel topological approach to fault diagnosis. In our researches, global information will be introduced into electric power system, we are using mainly BFS of graph theory algorithms to resolve fast and exact discrimination of faulty components and faulty sections, and finally accomplish fault diagnosis. Graph theory algorithms can be used to model many different physical and abstract systems such as transportation and communication networks, models for business administration, political science, and psychology and so on. In the study of fault diagnosis in electric power system, especially the fault diagnosis for mechanically-driven sections of equipments in power plant, graph theory algorithms must also have a good prospect of application.

关键词： Fault diagnosis Graph theory RLC circuits Voltage Circuit faults Resistors Electric variables measurement power system dynamics power system modeling Instruments

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The AC-DC hybrid transmission system ATC calculation based on continuation power flow

The AC-DC hybrid transmission system ATC calculation based o...

引用

International Conference on Sustainable power Generation and Supply, SUPERGEN

作者： Ning Ji Yajing Gao Ming Zhou Gengyin Li Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

ISBN: (纸本)9781424449347

Expanding the extra high voltage AC/DC hybrid transmission system and improving the transfer capability of the network are the primary tasks of the power network in China. With the increasing expansion of AC/DC transmission system scale, the super large scale hybrid network has taken shape in china, then the systematic research on ATC calculation model and algorithm for AC/DC systems is urgently needed. A new ATC computation model for AC/DC hybrid transmission system is proposed in this paper. In this model the effect of multiterminal DC system can be considered. CPF algorithm is presented to solve this model, then the ATC value of AC/DC hybrid transmission system can be gained. The algorithm based on MATLAB6.5 is developed. IEEE 14-bus test system is used to verify the presented approach.

关键词： Load flow Mathematical model power system reliability power system modeling power system interconnection Hybrid power systems Computational modeling Voltage Large-scale systems Computer languages

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RTDS Based Maximal power Point Tracking Simulation for Doubly-Fed Induction Generator

RTDS Based Maximal Power Point Tracking Simulation for Doubl...

引用

International Conference on Energy and Environment Technology (ICEET)

作者： Jiamin Zhang Ancheng Xue Tianshu Bi Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control School of Electrical Engineering North China Electric Power University Beijing China

In the control of the wind generation, the maximal power point tracking (MPPT) control plays important role in the efficiency. This paper presents the simulation results of the MPPT control with RTDS-based DFIG model. At first, it analyzes the vector-control scheme for the MTTP, which results in independent control of active and reactive power of the generator. And then, it develops the MPPT controller implemented on the rectifier and inverter based on PI control strategic. Furthermore, it builds the DFIG model based on the RTDS with the corresponding technology. And the simulation result with the proposed model verified the control strategy.

关键词： Induction generators Wind speed power system simulation Wind energy generation Wind power generation power generation Wind energy Velocity measurement Hardware control systems

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A novel approach on ATC determination for AC/DC transmission systems

A novel approach on ATC determination for AC/DC transmission...

引用

IEEE General Meeting power& Energy Society

With the increasing expansion of AC/DC transmission system scale, the research on available transfer capability (ATC) for AC/DC transmission systems has important academic and practical significances to AC/DC transmission system planning, operation and reliability evaluation. However, most of the present researches on the ATC calculation are only suitable for AC transmission system, few is about the ATC analysis for AC/DC systems. In this paper a novel ATC calculation model for AC/DC transmission systems is proposed, and alternate iterative continuation power flow algorithm is presented to solve this model. ATC of an AC/DC transmission system is computed considering the impacts of DC control system on ATC and compared to one of the AC system. The algorithm based on MATLAB6.5 is developed. The modified IEEE 14-bus test system is used to verify the presented approach.

关键词： power system reliability Load flow power system interconnection power system modeling Iterative algorithms control systems Mathematical model Voltage power system dynamics power system security

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power Equations and Non-Detection Zone of Passive Islanding Detection and protection Method for Grid Connected Photovoltaic Generation system

Power Equations and Non-Detection Zone of Passive Islanding ...

引用

Pacific-Asia Conference on Circuits, Communications and systems, PACCS

作者： Zengqiang Mi Fei Wang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding China

Islanding detection and protection is an important concern for grid connected photovoltaic (PV) power generation system due to personnel and equipment safety. Over/under voltage protection (OVP/UVP) and over/under frequency protection (OFP/UFP) are basical inverter resident passive islanding detection method (IDM) for detecting an islanding condition by monitor parameters in point of common coupling (PCC) such as voltage amplitude and frequency and then cause the inverter to shut down when there is sufficient transition from normal specified conditions. The real and reactive power equations and Non-Detection Zone (NDZ) of OVP/UVP and OFP/UFP methods for grid connected PV system are derived and analyzed in this paper. Analyses show that the behavior of the system at the time of disconnection will depend on the imbalance power at the instant before the switch opens to form the island, these results also indicate the NDZ of OVP/UVP and OFP/UFP methods is considerable large and the reaction times for these protective methodologies may be variable or unpredictable.

关键词： Equations power system protection Photovoltaic systems Solar power generation Mesh generation power generation Voltage Frequency Inverters Switches

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Fault Detection Based on Data Mining Theory

Fault Detection Based on Data Mining Theory

引用

International Workshop on Intelligent systems and Applications, ISA

In this paper, we adopt a novel applied approach to fault detection based on data mining theory. In our researches, global information will be introduced into the electric power system, we are using mainly cluster analysis technology of data mining theory to resolve fast and exact discrimination of faulty components and faulty sections, and finally accomplish fault detection in electric power systems. Data mining theory is defined as the process of automatically extracting valid, novel, potentially useful and ultimately comprehensive information from large databases. It has been widely utilized in both academic and applied scientific researches in which the data sets are generated by experiments. Data mining theory will contribute a lot in the study of fault detection.

关键词： Fault detection Data mining Data analysis Electrical fault detection Visual databases Information analysis monitoring Instruments Fault diagnosis power system reliability

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A protection scheme for phase-to-phase faults based on spectrum characteristic of fault-generated high-frequency transient signals

A protection scheme for phase-to-phase faults based on spect...

引用

IEEE General Meeting power& Energy Society

作者： S. F. Huang X. G. Wang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

When a fault occurs on a transmission line, fault-generated high-frequency signals contains a lot of information about fault. This paper proposes a protection scheme for phase-to-phase fault in transmission line based on spectrum characteristic of fault-generated high-frequency signals. The difference of fundamental natural frequencies in both ends of transmission line is used to determine whether a fault is internal or external. The scheme can reduce trip time if the fault is an internal fault and does not misoperate if the fault is external. It also can identify chose-up faults. The scheme performance was proven using power system Computer Aided Design (PSCAD) in 500-kV power system considering critical fault cases.

关键词： power system transients power transmission lines Frequency domain analysis Fault diagnosis power system protection PSCAD Voltage Fault detection Frequency measurement Bandwidth

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Technology Research of Novel Energy Storage control for the PV Generation system

Technology Research of Novel Energy Storage Control for the ...

引用

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

作者： Jinhui Xue Zhongdong Yin Bingbing Wu Ziping Wu Jun Li Key Laboratory of Power System Protection and Dynamic Security Monitoring And Control under Ministry of Education North China Electric Power University Beijing China

Recent years, technologies for new energy have developed rapidly since the energy crisis and the environmental pollution got worse. And the solar energy generation technology tends towards the stage of a large number of applications in engineering from the research stage. This paper designed a grid-connected PV system firstly, then introduced the operation principle of the various parts as well with the control strategy of the power flow. The design of energy storage is of great significance as the output power of PV cells array is greatly affected by the light intensity and the temperature change. Battery is used as the energy storage device normally in the traditional energy storage system. In this paper, it used the Ultracapacitor as the energy storage device after comparing with the battery, and designed the charge-discharge control strategy according to the characteristics of the ultracapacitor. Finally it verified the feasibility of the energy storage control strategy through the simulation models which was built based on the PSCAD/EMTDC platform.

关键词： Energy storage control systems Solar power generation Batteries Supercapacitors Pollution Solar energy power engineering and energy Load flow power generation

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