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# 2011 International Conference on Advanced Power System Automation and Protection

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Displaying Results 1 - 50 of 163
• ### PT 10kV high-voltage fuse bus causes and solutions

Publication Year: 2011, Page(s):1643 - 1645
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Neutral systems to 10kV high voltage fuse of Bus PT analyze the causes of possible causes for a variety of solutions were discussed. And Phoenix Zhengzhou 220KV substation power company actually running an example of the case occurred. View full abstract»

• ### 10kV voltage distribution network anomaly analysis

Publication Year: 2011, Page(s):1646 - 1649
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Distribution system voltage imbalance in the power system operation which is frequent,through the anomaly occurred when the voltage of the analysis to find out the reasons for the imbalance occurred, and then depending on the specific reasons for treatment. So this phenomenon in the study of very important practical significance. View full abstract»

• ### Medium voltage distribution network traveling wave fault location method based on wavelet packet energy spectrum

Publication Year: 2011, Page(s):1650 - 1655
Cited by:  Papers (1)
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In order to reduce the dispersion characteristics of Single-phase ground fault traveling wave propagation to the first detection of traveling wave and velocity measurements in the medium voltage distribution network, improve the accuracy of traveling wave fault location, the traveling wave fault location method be proposed based on wavelet packet energy spectrum of the medium voltage distribution ... View full abstract»

• ### Research on propagation regularity of voltage sags in power system

Publication Year: 2011, Page(s):1656 - 1660
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Voltage sag is a major power quality problem, which could disrupt the operation of voltage sensitive equipment. The fault in transmission and distribution lines of the power system creates voltage sags. It's important to analyze the voltage sags caused by faults in high voltage systems to solve the voltage sag problems of customers. A fully digital power system simulation tool, EMTDC/PSCAD, was ap... View full abstract»

• ### Application of fault line selection device in small current grounded system based Evidence theory in Beijing Electric Power Company

Publication Year: 2011, Page(s):1661 - 1665
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This paper discusses an method based on evidence- theory for the small current comprehensive line selection, this method obtain the signal of small current grounded occurred and use the phase comparison method, Wavelet method, the first semi-continuous wave method and other methods to calculate and determine continuously. Through the evidence fusion rules to fuse Information. Ultimately determine ... View full abstract»

• ### Some discussions about turn-to-turn protection configuration and setting of large hydraulic generator

Publication Year: 2011, Page(s):1666 - 1671
Cited by:  Papers (1)
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The consolidated differential protection could not be installed in generator in many old hydraulic power plants they are in running. Affected by various factors, the mal-operation of turn-to-turn protection based on other principles occurs easily. For a long time in operating the power plant, to prevent the mal-operation of turn-to-turn protection is a key point, so the turn-to-turn protection in ... View full abstract»

• ### Stator winding's inter-turn fault intelligent diagnosis in large turbo- generator by Elman neural network

Publication Year: 2011, Page(s):1672 - 1677
Cited by:  Papers (2)
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Turbo-generator stator's inter-turn short is a usual serious fault, there would have hidden big trouble for electric power system's safety due to lack of efficient protection. On-line monitoring generator's operate condition combined intelligence non-line identify technology is presented to observe fault in time instead of poor function of protection. Longitudinal zero-sequence voltage and fault p... View full abstract»

• ### New equivalent circuit of three-phase three-limb transformer based on magnetic circuit characteristics

Publication Year: 2011, Page(s):1678 - 1683
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Due to the characteristics of three-phase three-limb transformer core topology, its magnetic flux can be represented by leakage inductances, column leakage inductances and mutual inductances. Based on this representation, a new equivalent circuit model of three-phase three-limb transformer is proposed in this paper. The distinguishing feature of the new model is that the operating mechanism of thr... View full abstract»

• ### Study of the New Permanent Magnet switched reluctance motor

Publication Year: 2011, Page(s):1684 - 1687
Cited by:  Papers (1)
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I For the situation that the traditional switched reluctance motor exists output torque ripple, this article changes the motor structure, adding permanent magnets in the stator, which changes the motor into the hybrid-excitation motor and changes the magnetic circuit into the axial magnetic circuit. As a result, the magnetic circuit becomes shorter and the output torque becomes greater. Besides, b... View full abstract»

• ### Protection principles and Operating characteristics of the Voltage transformer differential protection devices

Publication Year: 2011, Page(s):1688 - 1690
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Based on the transformer products inter-circle short circuit process cause inter-circle voltage changes, will the change inter-circle voltage changing course in special extraction and judgment, so as to determine the working state of the winding is in working or in a short circuit process condition. Will the transformer inter-circle short circuit the whole process for DuoGe stage subdivision proce... View full abstract»

• ### Neutral grounding method and protection co-ordination on several direct-connected generators in parallel

Publication Year: 2011, Page(s):1691 - 1695
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There is a power micro grid composed of several diesel generators, cables, step-down transformers and motors. The similar grid scheme is applied to airports, mining plant, and oil platforms etc. In the micro grid, the generating system needs to meet the demands not only for supplying stable electricity, but also for keeping the islanding operation. As we know, damages of generator stator insulatio... View full abstract»

• ### The analysis and application of solar energy PV power

Publication Year: 2011, Page(s):1696 - 1700
Cited by:  Papers (1)
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Solar power is an important measure to improve the energy structure, so PV power application becomes an important research field. Based on the application of solar power in the high-speed railway stations and the canopy architectural design, this paper makes a comparison between independent system and grid-connected system and solar battery comparison, thoroughly studies the PV power in domestic r... View full abstract»

• ### Traveling waves based faulted feeder selector and its field application

Publication Year: 2011, Page(s):1701 - 1704
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The paper proposes faulted feeder selector in power distribution system with neutral non-effectively grounded. At first, the paper presents basic principle of single-phase-to-ground fault feeder selection based on traveling waves, which compares amplitude and polarity of the initial current traveling waves in all feeders. Then the implementation scheme, including hardware design and software flowc... View full abstract»

• ### Short-term wind power prediction based on combined grey-Markov model

Publication Year: 2011, Page(s):1705 - 1711
Cited by:  Papers (3)
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The rapid growth of wind generation is introducing additional variability and uncertainty into power system operations and planning. Wind power forecasting will improve the wind power integration in both economic and technical aspects. In the paper, a combined approach based on grey model and Markov model was proposed to predict wind power in a short term. Firstly a Grey model was created to forec... View full abstract»

• ### Impact of fuel cell on load modeling of distribution network

Publication Year: 2011, Page(s):1712 - 1717
Cited by:  Papers (1)
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I With the increasing proportion of distributed generation in power grid, its impacts cannot be simply neglected. This paper studies the influences of fuel cell (FC) generation system upon the load modeling of distribution network, employing Matlab/Simulink tool and the measurement-based method. Through the analysis of dynamic operation characteristics in the transient state processes of FC genera... View full abstract»

• ### Study on protection of large scale wind power integration

Publication Year: 2011, Page(s):1718 - 1722
Cited by:  Papers (3)
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It is apparent that more and more large capacity wind power will be fed into power system in the future, and certain technical challenges will emerge due to the fluctuation characteristics of wind power and the complex control of power electronics devices inside the wind turbines (e.g. Fault Ride Through - FRT, etc). By comparing one wind power integration grid with one hydropower integration grid... View full abstract»

• ### Constant voltage control on DC bus of PV system with flywheel energy storage source (FESS)

Publication Year: 2011, Page(s):1723 - 1727
Cited by:  Papers (1)
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Fluctuation of the voltage is always the major barrier to the effective application of photovoltaic energy. In this paper, the flywheel energy storage system (FESS) is added to PV system. Considering the fluctuation of photovoltaic energy and limitation of flywheel capacity, flywheel may store energy from the photovoltaic source or AC system, or release energy to load in order to maintain the stab... View full abstract»

• ### A travelling wave protection scheme for bipolar HVDC line

Publication Year: 2011, Page(s):1728 - 1731
Cited by:  Papers (1)
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The detection and fast clearance of faults in the HVDC lines are important. A traveling wave protection scheme for a bi-polar HVDC line is proposed in this paper. The identification of internal and external faults is based on the magnitude comparison criteria of the backward and forward travelling waves detected at the relay location. The modal analysis method is adopted to transform pole quantiti... View full abstract»

• ### A method for fault pole selection of two HVDC systems on the same tower

Publication Year: 2011, Page(s):1732 - 1735
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Owing to mutual influence between the two HVDC circuits on the same tower, the traditional protection of transmission line is faced with technical difficulties on fault pole identification, especially high-grounded fault loop impedance. Based on electromagnetic decoupling method for two bipole lines (TBL) on same tower is proposed by analyzed the characteristic of coupling mutual induction, a four... View full abstract»

• ### Researches on the time-varying failure rate characteristic for the HVDC protection devices in China Southern Power Grid

Publication Year: 2011, Page(s):1736 - 1739
Cited by:  Papers (1)
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In China Southern Power Grid (CSG), the SIMADYN D (SD) of SIEMENS plays an important role for the HVDC protection system. Based on the field failure data of SD, this paper studies the time-varying failure rate (TFR) characteristic for the protection devices of HVDC in the CSG. According to the concept of TFR, failure mode is divided into two types, one is the aging failure and the other is the ran... View full abstract»

• ### A study on CBM-oriented account management model of relay protection

Publication Year: 2011, Page(s):1740 - 1743
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Cascading trips caused by flow transferring is the crucial causation of many well-known blackouts. This paper confirms the research object and proposes he prerequisite of flow transferring identification. According to the basic characteristics of the fault dynamic process, this paper proposes a flow transferring identification scheme based on local information. The scheme does not rely on communic... View full abstract»

• ### Implementation of non-communication protection of double circuit line systems based on integrated protection platform

Publication Year: 2011, Page(s):1744 - 1749
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The implementation of non-communication protection of double circuit line systems based on two independent relays has disadvantages like information shareless,complex connection and lack of economic. This paper researched the implementation of non-communication protection of double circuit line systems based on one relay - the integrated protection platform. Hardware structure of the integrated pr... View full abstract»

• ### The analysis and corrective measures of common problems of 10 kV capacitor bank in substation

Publication Year: 2011, Page(s):1750 - 1752
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In this paper, based on instances in substation, the common problems in the management of capacitor bank were analyzed. Moreover, the standard painting method of capacitor bank, the operation procedures and the safety measures of capacitor bank in substation was discussed. The solution to address these problems was proposed, which could provide a theoretical basis for the capacitor bank maintenanc... View full abstract»

• ### A fault detection and isolation algorithm for distribution systems containing distributed generations

Publication Year: 2011, Page(s):1753 - 1756
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For the smart distribution system with distributed generation, a new fault detection and isolation matrix algorithm based on the fault overcurrents and their directions is proposed. Using the correlation matrix to describe the network topology, and the fault overcurrents and their directions from the grid's different fault detect points to form the fault information matrix, the fault section can b... View full abstract»

• ### Research and engineering practice of intelligent substation system

Publication Year: 2011, Page(s):1757 - 1761
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This paper introduces the definition and characteristics of intelligent substation, explains domestic and foreign research and application of intelligent substation, and points out the research and application of intelligent substation key problems and difficulties for our research and application of intelligent substation work in the right direction. View full abstract»

• ### Practice and trend of DSAS in China

Publication Year: 2011, Page(s):1762 - 1766
Cited by:  Papers (1)
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Digital Substation Automation Systems (DSAS), with some form of communication facility on station and/or bay level, have been in service for several decades. In recent years, the application of IEC 61850 is gradually achieved in China. The first application is MMS between station level and bay level, the second one is GOOSE message application in bay level and process level, and the last one is th... View full abstract»

• ### Design of intelligent dispatch systems network analysis software

Publication Year: 2011, Page(s):1767 - 1771
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Smart grid is the ideal solution for future power system. As the nerve center of smart grid, the intelligent dispatch systems represent the intelligence characteristics. The network analysis section is foundation to achieve intelligent dispatch. In traditional dispatch systems, the network analysis software (NAS) are divided by module functions and shows information respectively, which result that... View full abstract»

• ### The online fault diagnosis and visualization of the grid based on multi-dimensional three-state data co-processing

Publication Year: 2011, Page(s):1772 - 1777
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One of the most crucial issues, during the operation of power system, is to deal with the power failures timely and rapidly in case the accident grows bigger, which calls for our operators and controllers to judge the fault facilities correctly. Based on the development of science and information technology aimed at automatic control upon power grid, we put for-ward a method of online fault diagno... View full abstract»

• ### Design of a real-time monitoring system for transmission line galloping based on GPRS/CDMA

Publication Year: 2011, Page(s):1778 - 1781
| | PDF (732 KB) | HTML

According to the analysis of both advantages and disadvantages of various monitoring systems, a real-time monitoring system for transmission line's galloping based on GPRS/CDMA is developed in this paper. On one hand, measured data is used to modify the simulation model and calculation parameters to avoid empty theoretic study and deficiency of calculation precision. On the other hand, deficient m... View full abstract»

• ### Calculation of steady-state short-circuit current of wind turbines with doubly fed induction generator

Publication Year: 2011, Page(s):1782 - 1788
Cited by:  Papers (2)
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Against the backdrops that the large-scale DFIG-based wind generations are accessed to grid and requested to maintain grid-connected operation during faults, the short-circuit current contributed by the generation has become an unavoidable problem. However, the traditional calculation methods aimed at synchronous generator cannot apply to the grid contained the increasing DFIG-based wind generatio... View full abstract»

• ### Construction mode for Intelligent Distribution Network

Publication Year: 2011, Page(s):1789 - 1793
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Smart distribution grid is an important part of the smart grid. From the actual engineering demand of the construction of Intelligence Distribution Network, the definition of Intelligence Distribution Network and the technology principles of construction are argued firstly in this paper. According to the function arrangement and the appliance range, the construction mode of Intelligence Distributi... View full abstract»

• ### The typical construction mode research of intelligent distribution network

Publication Year: 2011, Page(s):1794 - 1798
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This paper introduced the conception and features of smart grid as well as analyzed research progress at home and abroad. The intelligent application in the field of power distribution was still in research and exploration phase. From information collecting, intelligent distribution transformer and distribution automation, intelligent distribution network construction idea and construction mode we... View full abstract»

• ### The WARMAP system closed-loop simulate validation based on RTDS

Publication Year: 2011, Page(s):1799 - 1802
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The Wide-Area Monitoring Analysis Protection Control System (WARMAP) is used for security and stability analysis and anti-accident measure in system development process in large-scale AC/DC parallel power grid. However, the WARMAP system should collect the required data from the Energy Management System (EMS) for calculation that not only increased the flexibility of the system but also extend the... View full abstract»

• ### Research on event sequence chain based dispatch information model

Publication Year: 2011, Page(s):1803 - 1805
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In power grid, information modeling and presentation have become more and more important for operators to quickly understand what is happening in power grid. Traditional dispatch log covers a lot of categories and event records. To simplify dispatch log and help operators pay more attention to core events and get better understanding of power grid, we proposed an event sequence chain based dispatc... View full abstract»

• ### Review on sustainable development of island microgrid

Publication Year: 2011, Page(s):1806 - 1813
Cited by:  Papers (3)
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In microgrid, distributed generators (DG) can be utilized effectively, and controlled intelligently and flexibly. By use of rich renewable energy sources (RES) on islands, island microgrids can be built to develop clean and pollution-free renewable energy power industry, which makes islands' natural balance of the regional energy industry achieved, the renewable energy' economy developed, the ind... View full abstract»

• ### Research on relay protection of grid- connected photovoltaic power station in the plateau

Publication Year: 2011, Page(s):1814 - 1818
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Protection of power system is an extremely important aspect as the quality and scheme of protection decides system reliability, controllability and stability. This paper concentrates on the protection of distribution system in the light of recent developments of photovoltaic generator (PV) in Qinghai. When PV is connected to the distribution system, it may have some effect on the traditional curre... View full abstract»

• ### A classification method for adaptive relay protection setting system based on clustering analysis

Publication Year: 2011, Page(s):1819 - 1823
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With the scale expansion of the distribution network and the improvement of the level of equipments automation, the network structure is transforming from radial and tree structure to the ring or even mesh structure gradually. Considering the high penetration of DGs in future, the operating environment will become more complicated. The relay based on off-line pickup setting pattern can't isolate f... View full abstract»

• ### Analysis of oscillation characteristics for Japan Eastern 50 Hz power system based on Campus WAMS

Publication Year: 2011, Page(s):1824 - 1827
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In Japan Eastern 50 Hz the power system, there are two PMUs (Phasor Measurement Unit) are installed between Hachinohe and Yokohama. The main objective of this paper is to present a monitoring and estimation of small disturbance angle stability of power system based on application practices of the CampusWAMS in Japan eastern 50 Hz. This scheme focuses on single dominant inter-area oscillation mode ... View full abstract»

• ### Unit commitment model considering nuclear power plant load following

Publication Year: 2011, Page(s):1828 - 1832
Cited by:  Papers (1)
| | PDF (648 KB) | HTML

Unit commitment can dramatically improve the economy of power system operation. Fossil fuel generating unit commitment problem has been widely researched. With the proportion of nuclear power capacity increasing, nuclear power plant need participate peak-valley load regulation for satisfying power balance demand. Consequently, generating unit economic commitment including nuclear power unit was re... View full abstract»

• ### The simulation of the controllable reactor and it's application in Ultra High Voltage Transmission Lines

Publication Year: 2011, Page(s):1833 - 1837
Cited by:  Papers (3)
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I Fixed shunt reactors are usually used in Ultra High Voltage Transmission network, which are not adjustable, but the parameters of Ultra High Voltage Transmission Lines are changing in different working condition and operating mode. Because shunt reactors are not adjustable, the power loss of transmission lines cannot be reduced. in view of this situation this article put forward a plan which use... View full abstract»

• ### China's protection technique in preventing power system blackout to world

Publication Year: 2011, Page(s):1838 - 1844
Cited by:  Papers (1)
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There have been 23 large blackouts which have occurred worldwide since 1965 each with a power loss ≥8,000MW. Blackouts usually occur through two stages: Stage one is related to voltage collapse/transient instability and the reason why most of the instability has occurred is because of the cascading trips' by impedance relays due to load transfer initiated by a single disturbance and a heav... View full abstract»

• ### Influence of SVC on fault component directional protection and its improvement approach

Publication Year: 2011, Page(s):1845 - 1850
Cited by:  Papers (1)
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SVC has been widely used in both transmission and distribution network as it can provide regulation measures for grid security, stability, efficient and flexible means of operational control. There is less research on the impacts of the protection caused by SVC accessing network at present, and lack of the concrete analysis about the impacts of SVC on the line protection. Based on the impedance ch... View full abstract»

• ### Application of single-phase three-wire transformer model in distribution network with solar home system

Publication Year: 2011, Page(s):1851 - 1856
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As solar home systems are concentrated in distribution network in residential areas, the voltage of connection points rises according to the reverse power flow when the demand of load is less than power generation out-put. When single- phase three-wire power distribution transformer (method) is applied to low-voltage distribution network, power flow calculation becomes the major approach to perfor... View full abstract»

• ### Preventive methods against blackouts based on protection security assessment in future grids

Publication Year: 2011, Page(s):1857 - 1861
Cited by:  Papers (2)
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The paper presents a new automated method for assessing the security of protection systems concerning selectivity and speed to reduce the risk of unnecessary disturbances and blackouts. The invented algorithms are capable to handle complex structures. Hence, the system behavior of a protection system and network is analyzed and assessed as a whole and it has not to be reduced to its single compone... View full abstract»

• ### Discuss of wide-area relay protection based on wide-area information

Publication Year: 2011, Page(s):1862 - 1868
Cited by:  Papers (1)
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The paper first analyzes the current main protection principles utilized in wide-area relay protection system, including: wide-area current differential protection, wide-area direction comparative protection and adaptive protection based on the wide-area information of the power grid. Contrary to the exiting problems, this paper proposed some suggestions. Then from the application point, the struc... View full abstract»

• ### Design and implementation of IEC 61850 based Multi-type Protection IED

Publication Year: 2011, Page(s):1869 - 1874
Cited by:  Papers (1)
| | PDF (1779 KB) | HTML

An IEC 61850 based Substation Automation System (SAS) changed existing substation environment to a digital system environment using Ethernet based communication network and microprocessor based IED. Although, system environment has changed to a new environment, but operation and protection schemes have not taken full advantage of the new system environment. In this paper, a Multi-type Protection I... View full abstract»

• ### The study of CIM based relay protection model considering Distributed Generation

Publication Year: 2011, Page(s):1875 - 1879
| | PDF (816 KB) | HTML

Smart grid has become the development trend of the future power grid, and the accessed Distributed Generation is a very important aspect of smart grid. While distributed generation accessed in distribution network, it makes distribution network protection can't operate properly, which makes difficulties to relay protection setting. Relay protection setting, online checking, considering the online ... View full abstract»

• ### Asynchronous interconnected technology research on VFT

Publication Year: 2011, Page(s):1880 - 1883
| | PDF (1742 KB) | HTML

Recently, asynchronous networking technology achieved a significant progress, there is a new “face-to-face” type-asynchronous connect device based on the Variable Frequency Transformer(VFT), which has well mechanical and electrical performances. In the article, in accordance with the running principle of the VFT device, the equipment's Simulation model was constructed, and then this ... View full abstract»

• ### An approach to determine penetration level of Distributed Generation considering fuse fatigue issues in distribution radial feeders

Publication Year: 2011, Page(s):1884 - 1889
| | PDF (635 KB) | HTML

The use of Distributed Generation in distribution systems has many benefits but this systems initially has been built for simple one-way power delivery, interconnecting small generators requires new thinking and new methods for operating the network with new challenges. Small-scale generators located on the distribution level are generally referred to as distributed generation (DG). Notable among ... View full abstract»

• ### Optimal coordinated control strategy of AGC and AVC based on hierarchical control

Publication Year: 2011, Page(s):1890 - 1895
Cited by:  Papers (2)
| | PDF (1606 KB) | HTML

Negative effects exists between the control commands and control targets of AGC and AVC system, which result in a series of problems such as system security and overshoot. This paper models a coordinated automatic control system of AGC and AVC based on hierarchical control, adopting decomposition-coordination method between active power and reactive power based on time dimension, the design scheme... View full abstract»