ISSN 1000-1026
CN 32-1180/TP
  • ISSN 1000-1026
  • CN 32-1180/TP

ISSN 1000-1026

CN 32-1180/TP

Automation of Electric Power Systems

Competent Authorities:State Grid Corporation of China

Sponsored by:State Grid Electric Power Research Institute/NARI Group Corporation

Publisher:State Grid Electric Power Research Institute Press

Journal Tags:Ei,Scopus,INSPEC,CSA,CAS,AJ,JST,Google Scholar,CSAD-C,CSPD,CSCD,CCJAD,CAJCED

  • Period:Semimonthly Publication
  • Editor in Chief:XUE Yusheng
  • Language:Chinese
  • Release Date:Feb,1977

Description

Automation of Electric Power Systems (AEPS),started publication since 1977,has been one of the core periodicals of Ei since 1999 and has been indexed in 14 famous domestic and overseas searching databases. The authoritative data from Google scholar H5, SCImago Journal Rank, CiteScore metrics from Scopus, etc. show that AEPS is always among the best Chinese academic journals.

        Also, AEPS is one of the journals with the highest impact factor for years in the field of electric power in China.

Single-line Diagram of Substation Centralized Distribution Network: Part Two Initial Auto Layout
WANG Yunhan , QIU Chengfeng , WANGFenghua , ZHANG Jianguang , ZHANG Xudong , XU Wanqiu
2019/7/18 16:19:16  DOI: 10.7500/AEPS20180827010
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The previous paper in this series has proposed a data-diagram model for substation centralized distribution network (SCDN) to support a data-driven single-line diagram automatic generation, these two following papers will present a two-stages single-line connection diagram for SCDN while the first paper introduces the initial layout auto-generation which focuses a radial layout with the 10kV bus bars as the center for all the feeders of this substation in loop connection as well as power transfer connection with other substations, and a followed paper will focus on beautifying and optimization for the initial layout. In this paper, a complete flowchart including module design as well as data preparing procedures are firstly presented. Through feeder topologic analysis, a layout planning of SCDN feeder groups is worked out, and a branch-trunk layout model is suggested based on trunk-branch topographic model; based on study of loop properties, calculation methods for the loop and none-loop branch-trunk layout model are worked out, and followed by a horizontal initial layout calculation methods for SCDN single feeder split diagram, target fan shape angle and rotation calculation method, fan shape jointing method, simple bonding method for two virtual interconnection switch nodes, which forms a complete SCDN initial single-line diagram. Above methods as well as algorithms are testified by 5 real 110 kV substations.
Mechanism and Suppression Strategy of Capacitor Voltage Fluctuation Difference in Hybrid MMC
LU feng , LI Yu , FAN Qiang , ZHAO Chengyong , XU Jianzhong , QU Haitao
2019/7/18 8:50:23  DOI: 10.7500/AEPS20190325003
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Reducing the amplitude of the capacitor voltage ripple of the sub-module in the multilevel modular converter (MMC) is expected to reduce the capacitance, volume and cost of the sub-module capacitor, and has important research value. This paper analyzes the characteristic of the capacitor voltage fluctuation and the fluctuation difference between half-bridge and full-bridge submodules with over-modulation in hybrid MMC, which determines the corresponding energy accumulation interval. Then, the extreme point distribution and zero crossing point distribution of the arm voltage reference with the third harmonic voltage injection are discussed. The relationship among the injection coefficient of third harmonic voltage, the modulation index and the fluctuation difference suppression capability is established. Aiming at reducing the difference of capacitance energy accumulation between half-bridge and full-bridge submodules, the third harmonic voltage injection quantity is optimized, and the suppression strategy of sub-module capacitor voltage fluctuation difference based on the third harmonic injection optimization is proposed. Then an example of calculation for reducing the capacitance is presented. Finally, the correctness and validity of the proposed strategy are verified by the simulation of double-ended hybrid MMC in PSCAD/EMTDC.
Current-fed Full-bridge Photovoltaic Micro-inverter with Reduction of Low-frequency Current Ripple
KAN Jiarong
2019/7/16 13:46:47  DOI: 10.7500/AEPS20181216001
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The proper level of low frequency current ripple can effectively extend the lifetime of micro-inverter and improve output power of photovoltaic cell. This paper designs a current-fed full-bridge converter as the former stage of the photovoltaic micro-inverter. A dual duty cycle modulation strategy for the converter is proposed, and the operation principle of converter with this modulation strategy is analyzed. Based on this, this paper proposed a strategy for realizing reduction of low-frequency current ripple on the photovoltaic cell side. The small signal model of the converter is analyzed. And the regulator parameters of the boost inductor current inner loop, the photovoltaic cell voltage outer loop and the voltage loop of low voltage side are designed. Through the root locus, it is verified that the converter can operate stably throughout the operation range of photovoltaic cell. The operation results of experimental prototype verify the correctness of the analysis and design parameters.
Fault Transient Analysis and Protection for Transmission Lines with Integration of Centralized Photovoltaic
LI Zewen , XIAO Renping , DU Yudong
2019/7/16 13:45:24  DOI: 10.7500/AEPS20181231004
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The fault transient process on the centralized photovoltaic (PV) side shows a completely different fault characteristic from the system side,resulting in traditional relays based on power frequency existing low performance after the PV grid-connected transmission line occurs fault.In order to improve the reliability of protection action, the paper firstly analyzes the fault characteristics of photovoltaic side short-circuit current, then,deduces the approximate analytical expression of three different stages of photovoltaic side short-circuit current, and analyzes the variation characteristics of the power control transient process detailedly. It is found that the transient current provided by the photovoltaic side is a non-rotational amount, which is completely different from the waveform characteristic of the attenuation rotating amount on the system side.Using this characteristic, a novel polit protection method based on transient current waveform correlation is proposed.Finally, The simulation results show that the proposed protection scheme can operate reliably under various fault types and different transition resistances, which is expected to improve the safe operation capability of photovoltaic grid-connected transmission lines.
Deep Belief Network based Method for Feature Extraction and Source Identification of Voltage Sag
LI Danqi , MEI Fei , ZHANG Chenyu , SHA Haoyuan , ZHENG Jianyong , LI Taoran
2019/7/16 13:43:35  DOI: 10.7500/AEPS20190306004
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In this paper, a method of voltage sag feature extraction and sag source identification based on DBN is proposed. The feature extraction ability of DBN is used to extract the feature data from the measured waveform data, which solves the problem that the artificial extraction features relie on expert experience and do not have generality are solved. The multi-hidden layer structure network learning feature is used to realize the identification of the sag source. The model set feature extractor and classifier are integrated to optimize the model structure and improve the efficiency of sag source identification. he optimal parameters of the model are selected, and the DBN model suitable for the data type of voltage sag is established. The feature extraction and sag source identification of the measured sag data of the power grid are carried out. The superiority of DBN method in feature extraction and sag source identification has been verified by comparison, and it is suitable for practical engineering.
专辑:面向新型城镇的能源互联关键技术及应用(一)
Guest Chief Editor's Note
ZHENG Yuping
2019, 43(14): 1-1.DOI: 10.7500/AEPS20190603014
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Key Technology and Application of Energy Internet Oriented to New-type Towns
ZHENG Yuping , WANG Dan , WAN Can , YANG Zhihong , CHEN Jingcheng , LI Jingru , WU Lin
2019, 43(14): 2-15.DOI: 10.7500/AEPS20181130012
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Energy Internet oriented to new-type towns possesses the characteristics of multi-energy coordination and open transaction. Energy Internet technology could change the way of energy utilization for urban users, and it would become one of the effective ways of solving future urban energy issues in the urbanization process of China. This paper analyses some key scientific problems of Energy Internet oriented to new-type towns from two aspects: planning and optimized operation of multi-energy coupled integrated energy system, uncertainty prediction of distributed multi-energy “source-load” and market transaction. On this basis, the key technology and application research framework of Energy Internet oriented to new-type towns are presented. Furthermore, this paper proposes details and research routes for key technologies of Energy Internet oriented to new-type towns, including interconnection and interactive planning of multi-energy networks, optimized scheduling towards multiple agents, distributed energy transaction and multi-energy market mechanism, comprehensive evaluation of all energy links, interactive energy equipment with multi-energy access and coordinated operation, and construction methods of typical demonstration project.
Research and Prospect of Key Technologies for Energy Interconnection System Planning for New-type Towns
WANG Dan , MENG Zhengji , JIA Hongjie , LI Jingru , YU Jiancheng , ZHANG Ziyang
2019, 43(14): 16-28.DOI: 10.7500/AEPS20181120003
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Energy interconnection system integrating “Internet+” has become a new development form of energy industry under the background of new urbanlization. For transforming the energy interconnection system for new-type towns from theory to reality and achieving sustainable development, it is of great significance to fully consider urban resource endowment & regional energy supply characteristics and a reasonable energy interconnection method according to local conditions. Firstly, the characteristics of the energy interconnection system for new-type towns are introduced and the basic structure of the energy interconnection system is proposed. Secondly, the modeling methods of energy station, energy network and the joint station-network system are described. The joint planning model and solution method of energy station, energy network and interconnection system are introduced from the perspective of multi-energy load forecasting. Differences and connections between different planning theories are analyzed. Finally, the possible development direction of energy interconnection system for new-type towns is forecasted.
Research Status and Prospect of Energy Trading Mode and User Demand Response in Urban Energy Internet
WAN Can , JIA Yanbo , LI Biao , SONG Yonghua
2019, 43(14): 29-40.DOI: 10.7500/AEPS20181130011
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Building urban Energy Internet, promoting renewable energy near-transaction and realizing user demand response are the key ways to solve the reliable energy supply issues of urban area, which can promote energy utilization efficiency in urban areas, improve distributed renewable energy consumption capacity and change energy consumption structure. In this paper, the market structure and user characteristics of the urban Energy Internet are proposed based on the concept and attributes of urban Energy Internet. According to the topological structure of energy trading, some energy trading modes and derivative trading modes of the urban Energy Internet are discussed. Subsequently, the traditional response and market-based response strategy are compared and analyzed, showing the superiority of the latter one. This paper also discusses some new situations in user demand response of the urban Energy Internet development. Finally, this paper summarizes the key technologies of energy trading mode and user demand response strategy in urban Energy Internet as well as their future development trends.
Review and Prospect of Comprehensive Evaluation Technology of Regional Energy Internet
YUAN Kai , LI Jingru , SONG Yi , MU Yunfei , SUN Chongbo , XU Yin , HU Danlei , CHEN Wanqing
2019, 43(14): 41-52.DOI: 10.7500/AEPS20181129009
[Abtract](69)[PDF](24)
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Energy Internet is an important application of “Internet +” smart energy in the new urbanization process of China. It has the characteristics of complex energy structure, multi-energy interaction, and uncertainty of space and time. Meanwhile, with the gradual application of Energy Internet technologies and the continuous development of demonstration projects in recent years, comprehensive evaluation is becoming more and more important as a feedback link to measure the advancement of Energy Internet technology and engineering application. The comprehensive evaluation theory covers two aspects including the index system and the evaluation method. This paper presents the research status of comprehensive evaluation index of Energy Internet including technical, economic and social indicators. Then, this paper summarizes and analyses the existing Energy Internet evaluation methods. Finally, combined with the development appeal of Energy Internet of China, the prospect of future research directions of Energy Internet comprehensive evaluation technology is proposed.

Editors Recommend

Key Technology and Application of Energy Internet Oriented to New-type Towns
ZHENG Yuping , WANG Dan , WAN Can , YANG Zhihong , CHEN Jingcheng , LI Jingru , WU Lin
2019, 43(14): 2-15.DOI: 10.7500/AEPS20181130012
[Abtract](92)[PDF](33)
Abtract:
Energy Internet oriented to new-type towns possesses the characteristics of multi-energy coordination and open transaction. Energy Internet technology could change the way of energy utilization for urban users, and it would become one of the effective ways of solving future urban energy issues in the urbanization process of China. This paper analyses some key scientific problems of Energy Internet oriented to new-type towns from two aspects: planning and optimized operation of multi-energy coupled integrated energy system, uncertainty prediction of distributed multi-energy “source-load” and market transaction. On this basis, the key technology and application research framework of Energy Internet oriented to new-type towns are presented. Furthermore, this paper proposes details and research routes for key technologies of Energy Internet oriented to new-type towns, including interconnection and interactive planning of multi-energy networks, optimized scheduling towards multiple agents, distributed energy transaction and multi-energy market mechanism, comprehensive evaluation of all energy links, interactive energy equipment with multi-energy access and coordinated operation, and construction methods of typical demonstration project.
Review and Prospect of Comprehensive Evaluation Technology of Regional Energy Internet
YUAN Kai , LI Jingru , SONG Yi , MU Yunfei , SUN Chongbo , XU Yin , HU Danlei , CHEN Wanqing
2019, 43(14): 41-52.DOI: 10.7500/AEPS20181129009
[Abtract](69)[PDF](24)
Abtract:
Energy Internet is an important application of “Internet +” smart energy in the new urbanization process of China. It has the characteristics of complex energy structure, multi-energy interaction, and uncertainty of space and time. Meanwhile, with the gradual application of Energy Internet technologies and the continuous development of demonstration projects in recent years, comprehensive evaluation is becoming more and more important as a feedback link to measure the advancement of Energy Internet technology and engineering application. The comprehensive evaluation theory covers two aspects including the index system and the evaluation method. This paper presents the research status of comprehensive evaluation index of Energy Internet including technical, economic and social indicators. Then, this paper summarizes and analyses the existing Energy Internet evaluation methods. Finally, combined with the development appeal of Energy Internet of China, the prospect of future research directions of Energy Internet comprehensive evaluation technology is proposed.
Research Status and Prospect of Energy Trading Mode and User Demand Response in Urban Energy Internet
WAN Can , JIA Yanbo , LI Biao , SONG Yonghua
2019, 43(14): 29-40.DOI: 10.7500/AEPS20181130011
[Abtract](75)[PDF](25)
Abtract:
Building urban Energy Internet, promoting renewable energy near-transaction and realizing user demand response are the key ways to solve the reliable energy supply issues of urban area, which can promote energy utilization efficiency in urban areas, improve distributed renewable energy consumption capacity and change energy consumption structure. In this paper, the market structure and user characteristics of the urban Energy Internet are proposed based on the concept and attributes of urban Energy Internet. According to the topological structure of energy trading, some energy trading modes and derivative trading modes of the urban Energy Internet are discussed. Subsequently, the traditional response and market-based response strategy are compared and analyzed, showing the superiority of the latter one. This paper also discusses some new situations in user demand response of the urban Energy Internet development. Finally, this paper summarizes the key technologies of energy trading mode and user demand response strategy in urban Energy Internet as well as their future development trends.
Research and Prospect of Key Technologies for Energy Interconnection System Planning for New-type Towns
WANG Dan , MENG Zhengji , JIA Hongjie , LI Jingru , YU Jiancheng , ZHANG Ziyang
2019, 43(14): 16-28.DOI: 10.7500/AEPS20181120003
[Abtract](83)[PDF](28)
Abtract:
Energy interconnection system integrating “Internet+” has become a new development form of energy industry under the background of new urbanlization. For transforming the energy interconnection system for new-type towns from theory to reality and achieving sustainable development, it is of great significance to fully consider urban resource endowment & regional energy supply characteristics and a reasonable energy interconnection method according to local conditions. Firstly, the characteristics of the energy interconnection system for new-type towns are introduced and the basic structure of the energy interconnection system is proposed. Secondly, the modeling methods of energy station, energy network and the joint station-network system are described. The joint planning model and solution method of energy station, energy network and interconnection system are introduced from the perspective of multi-energy load forecasting. Differences and connections between different planning theories are analyzed. Finally, the possible development direction of energy interconnection system for new-type towns is forecasted.
Explanation and Prospect of Ubiquitous Electric Power Internet of Things
YANG Ting , ZHAI Feng , ZHAO Yingjie , PEN Haibo
2019, 43(13): 9-20.DOI: 10.7500/AEPS20190418015
[Abtract](878)[PDF](510)
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Energy Internet is a new type of ecological energy system regarding electric energy as the center, realizing multi-energy coordination, consumption synergy, centralized or distributed coordination, and extensive participation of the public, in which the main performance is the strong integration of the smart grid and ubiquitous electric power internet of things. But the ubiquitous electric power internet of things is just in its infancy and is a key step in the construction of Energy Internet. The construction of ubiquitous electric power internet of things has obvious positive significance for improving user experience, improving the operation level of the power grid, promoting new energy consumption and cultivating emerging businesses. This paper summarizes the overview of the internet of things, the characteristics of ubiquitous electric power internet of things, the key technologies supporting ubiquitous power internet of things and the typical application scenarios. Finally, the challenges in the development of ubiquitous power internet of things is analyzed and prospected.

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