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.

Power Control of Single Phase Electric Spring Based on Feedforward Decoupling Algorithm
zuowujian , wangqingsong , chengming , dengfujin
2019/5/22 11:36:45  DOI: 10.7500/AEPS20180907007
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A type of power control based on feedforward decoupling for single-phase electric spring was proposed in this paper. Pure resistive loads are used to establish the mathematical model of single phase ES in different coordinate systems. The SOGI is used to construct the virtual quadrature voltage and current signals to complete the single phase dq rotation coordinate transformation. Considering the particularity of the single phase ES itself structure, an additional filter capacitor voltage inner loop is introduced in the structure to replace the traditional power decoupling control double closed loop to achieve the purpose of independent control of the active and reactive power input of the common connection point, and the design of the inner loop is described in detail. Finally, the proposed power decoupling control method has been verified by the experimental results.
Master-Slave Splitting Algorithm of Global Dynamic Power Flow for Transmission and Distribution Networks with Electromagnetic Loop Networks
YANG Yi , GUO Zhizhong
2019/5/22 8:44:55  DOI: 10.7500/AEPS20181122001
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When calculating the post-contingency steady-state power flow of the whole transmission and distribution networks, the global dynamic power flow is closer to the actual situation than the conventional dynamic power flow computed only in the transmission networks. To solve the distributed computation problem of global dynamic power flow, the master-slave splitting algorithm is adopted. Firstly, the transmission network and the distribution networks are split based on the equivalence of distribution network. Secondly, the dynamic power flows are separately calculated in the transmission and distribution networks. Thirdly, the master-slave iterations are realized by interchanging a small amount of data between networks. According to the electromagnetic loop network theory, a starting speed-up section is designed at the first master-slave iteration in order to achieve a more precise system frequency increment at the very beginning of the iterations, which will speed up the calculation. Numerical tests validate that the master-slave splitting algorithm with the starting speed-up section for global dynamic power flow has an accurate and fast capability in calculating the post-contingency power flow, and is suitable for distributed computation between transmission and distribution networks.
Energy Coordination Management Strategy for Solving Three-Phase Power Imbalance Prob-lem Under Hybrid Microgrid
MA Dazhong , WANG Xuechun , WANG Hao , WANG Rui , SUN Qiuye
2019/5/21 14:55:35  DOI: 10.7500/AEPS20181212008
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For the single/three-phase AC/DC hybrid microgrid characterized by unbalanced three-phase, this paper proposes an autonomous distributed storage system based on segmented droop control in the DC microgrid and a regional power balance management strategy of the interfaced converter in the hybrid AC/DC microgrid, for the purpose of achieving equalization power and improving renewable energy utilization. In particular, the topology and power exchange mode of the single/three-phase AC/DC hybrid microgrid are established first. Then, a dynamic equilibrium SoC consistent strategy is designed to address the issues of the local current circulation, which is prone to energy storage systems based on segmented droop curves, and the plug-and-play of power supply and load in the distributed manner. Furthermore, accounting the constant power interaction and hybrid microgrid voltage/frequency stability, a coordinated control strategy is proposed based on a regional power balance management strategy and an autonomous distributed storage system with the feature of segmented droop control. Finally, the effectiveness of the proposed approach is verified by extensive simulations and experiments.
Multi-objective Optimization Dispatching for Wind-Thermal Power Joint System Considering Temporal and Spatial Distribution of Air Pollutants
LI Zhuohuan , CHEN Yixuan , YU Tao , TANG Jianlin
2019/5/21 14:53:49  DOI: 10.7500/AEPS20190225007
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This paper proposes a multi-objective optimization dispatching method for wind-thermal power joint system considering temporal and spatial distribution of air pollutants. Firstly, a temporal and spatial distribution model of pollutants is constructed, which takes the diurnal variation of the atmospheric boundary layer into account. The impact of pollutants emission is evaluated from ground-level air pollutant concentration and the spatial and temporal distribution of pollutants. Besides, based on the model above, a multi-objective optimization dispatching model for wind-thermal power system is constructed. The method of interpolation for geographic grid and the wind speed model is used to couple wind power generation and the spatial and temporal distribution of pollutants,and the randomness of output of wind power plant and temporal and spatial distribution of pollutants is taken into full consideration in dispatching model. Finally, the model is transformed and solved by chance-constrained stochastic program, meanwhile, the multi-objective optimization method is employed to solve the optimization problem of the three targets, which include the economic cost, carbon emission and comprehensive assessment on pollutants. IEEE 39-bus system and the case of Guangdong power grid indicate that, the distribution of air pollutants has spatial and temporal correlation with the meteorological condition. The method can not only reduce the air pollution caused by thermal power plants effectively, but also handle the extreme cases where the output generated from clean energy is limited and air pollutants accumulate.
Performance Optimization of MDI-QKD Protocol and Quantum Key Application Strategies in Power Dispatching
MA Yonghong , YI Lichen , CHEN Yalin , LI Wenjing
2019/5/21 14:52:17  DOI: 10.7500/AEPS20181017009
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Power dispatching data network (PDDN) is the nerve center of modern large-scale interconnected power grids. With the development of smart grid, PDDN faces increasingly serious information security risks, while the decoy-state measurement-device-independent (MDI) quantum key distribution (QKD) protocol is a kind of QKD protocol that combines security and practicality better up to now. This paper takes China’s PDDN with hierarchical centralized control architecture as the research prototype. Firstly, from the perspective of quantum key supply, we adopt the local search algorithm to optimize the configuration parameters of both symmetric and asymmetric MDI-QKD protocols, and finally obtain their optimal secure key rates. Then, from the perspective of quantum key usage, the quantum key application strategy for the core dispatching services is designed, and the joint dynamic adjustment tests of multi-node time-slot and service key-update-frequency are carried out. The test results show that the proposed MDI quantum key supply and application strategy for power dispatch can improve the efficiency of multi-node QKD and cope with the occurrence of various abnormal emergencies, and thus maximize the security of PDDN’s data transmission.
Cyber Energy Systems
A Review on Research of Cyber-attacks and Defense in Cyber Physical Power Systems: Part Two Detection and Protection
TANG Yi , LI Mengya , WANG Qi , NI Ming
2019, 43(10): 1-9.DOI: 10.7500/AEPS20180906007
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Following the previous paper in the series, this paper provides a review of existing research methods on the sub-topics of attack detection and defense strategy. The purposes and natures of research work of the sub-topics are concluded, and the deficiencies of existing researches are described considering the characteristics of cyber physical power system(CPPS). In terms of attack detection, some methods are proposed based on deviation and feature, which are implemented in cyber and physical sides in CPPS. In terms of protection, existing researches are concluded as the protection methods deployed on cyber side which are mainly reactive protection measures, and the protection methods deployed on physical sides which are mainly based on the ideas of redundant resources and corrective control. On the basis of existing research, the key techniques in CPPS cyber-attack detection and defense are drawn, and future research proposals in these fields are made in accordance with research perspective of modeling, in order to improve the real ability of CPPS to defend itself against cyber-attacks.
Optimal Economic Scheduling for Multi-microgrid System with Combined Cooling, Heating and Power Considering Service of Energy Storage Station
WU Shengjun , LIU Jiankun , ZHOU Qian , WANG Chenggen , CHEN Zhe
2019, 43(10): 10-18.DOI: 10.7500/AEPS20181024001
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A day-ahead optimal scheduling method for combined cooling heating and power(CCHP)multi-microgrid system considering energy storage station service is proposed. Firstly, the public energy storage station is built in the multi-microgrid system, and the service mode for the energy storage station on the user side is proposed. Then, the energy storage station service is applied to the optimal economic schedule of CCHP multi-microgrid system. The power balance and operation cost of the cooling load, heating load and power load in microgrids are optimized by coordinating the interactive power between energy storage station and microgrids. Finally, three operation modes of CCHP multi-microgrid system under the typical scenarios are carried out to analyze the optimal economic scheduling. Numerical studies demonstrate that the proposed optimal scheduling method can effectively improve the operation flexibility of the public energy storage station, realize time-domain transfer of the excess energy of microgrids and consume the renewable energy generation by 100%, while reduce the operation costs of CCHP multi-microgrid system.
Basic Research
Adequacy Optimization for a Large-scale Renewable Energy Integrated Power System Part Two Collaborative Optimization of Multi-grade Reserve
WU Jun , XUE Yusheng , SHU Yinbiao , XIE Dongliang , SONG Xiaofang , XU Yan
2019, 43(10): 19-26.DOI: 10.7500/AEPS20181023002
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With the gradual increase of the intermittent renewable energy generation, the demand of system reserve capacity is raised accordingly. The pure use of spinning-grade reserve for supporting reserve capacity to the system will not only cause economic problems, but also lead to high CO2 emission from long-term maintenance of high proportion of spinning-grade reserve, which violates the original intention in developing renewable energy generation. The use of flexible non-spinning-grade reserve will provide standby service and have great help to improve the adequacy of the system, which is an important way to promote the consumption of renewable energy. Aiming at the inadequacy of current optimization research in non-spinning-grade reserve, firstly, the dispatch mode and optimization model for non-spinning reserve on both the generation side and demand side are analyzed under the market mechanism. Then, a hybrid optimization method considering the differences and complementarities of spinning-grade and non-spinning reserve is proposed under multiple adequacy scenarios. Finally, detailed case studies verify the feasibility and effectiveness of the proposed optimization method.
Joint Planning of Generalized Energy Storage Resource and Distributed Generator Considering Operation Control Strategy
CHENG Lin , QI Ning , TIAN Liting
2019, 43(10): 27-35.DOI: 10.7500/AEPS20180814004
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Aiming at the joint planning problem of generalized energy storage resources and distributed generator, a response model including fixed energy storage, shiftable load, transferable load and reducible load is proposed. Furthermore, the joint planning problem of generalized energy storage resources and distributed generator considering operation control strategies is solved by a bi-level optimization architecture. The practical significance and methods of siting and locating of different regulatory resources are put forward. The upper layer uses improved multi-objective particle swarm optimization algorithm to search the location and capacity selection scheme. The lower layer uses branch and bound method to solve the operation control strategy of generalized energy storage. The joint optimization configuration of resources is implemented by alternate optimization of upper and lower levels. The simulation results of multi-scenario in IEEE 33-node distribution system verify the practicability of the proposed model and prove the advantages and significance of joint planning and operation control of the virtual energy system.
Impact Evaluation of Operation Strategies of Multiple Energy Storage Systems on Reliability of Multi-energy Microgrid
LIU Hong , LI Jifeng , GE Shaoyun , ZHANG Peng , SUN Hao , WANG Yiran
2019, 43(10): 36-43.DOI: 10.7500/AEPS20180313006
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In view of the research background that the effect of energy storage on the reliability of energy supply is still to be excavated, the effect of multiple energy storage on the reliability of energy supply is quantitatively analyzed by formulating different operation strategies of energy storage link and combining relevant reliability indices. Firstly, taking the multi-energy microgrid as the research object, the energy efficiency model of key device is constructed. Secondly, different operation strategies for the energy storage devices are formulated, and the corresponding indicators are sorted out to analyze the characteristics of energy storage device and the impact on the system reliability. Finally, the effect of different configuration of energy storage devices and different operation strategies on the reliability of energy supply system are analyzed quantitatively by actual examples. This paper focuses on the analysis of the impact of the energy storage link of multi-energy microgrid on the reliability of energy supply system, thus providing guidance for the planning of energy storage device.

Editors Recommend

Joint Planning of Generalized Energy Storage Resource and Distributed Generator Considering Operation Control Strategy
CHENG Lin , QI Ning , TIAN Liting
2019, 43(10): 27-35.DOI: 10.7500/AEPS20180814004
[Abtract](350)[PDF](479)
Abtract:
Aiming at the joint planning problem of generalized energy storage resources and distributed generator, a response model including fixed energy storage, shiftable load, transferable load and reducible load is proposed. Furthermore, the joint planning problem of generalized energy storage resources and distributed generator considering operation control strategies is solved by a bi-level optimization architecture. The practical significance and methods of siting and locating of different regulatory resources are put forward. The upper layer uses improved multi-objective particle swarm optimization algorithm to search the location and capacity selection scheme. The lower layer uses branch and bound method to solve the operation control strategy of generalized energy storage. The joint optimization configuration of resources is implemented by alternate optimization of upper and lower levels. The simulation results of multi-scenario in IEEE 33-node distribution system verify the practicability of the proposed model and prove the advantages and significance of joint planning and operation control of the virtual energy system.
Adequacy Optimization for a Large-scale Renewable Energy Integrated Power System Part Two Collaborative Optimization of Multi-grade Reserve
WU Jun , XUE Yusheng , SHU Yinbiao , XIE Dongliang , SONG Xiaofang , XU Yan
2019, 43(10): 19-26.DOI: 10.7500/AEPS20181023002
[Abtract](253)[PDF](165)
Abtract:
With the gradual increase of the intermittent renewable energy generation, the demand of system reserve capacity is raised accordingly. The pure use of spinning-grade reserve for supporting reserve capacity to the system will not only cause economic problems, but also lead to high CO2 emission from long-term maintenance of high proportion of spinning-grade reserve, which violates the original intention in developing renewable energy generation. The use of flexible non-spinning-grade reserve will provide standby service and have great help to improve the adequacy of the system, which is an important way to promote the consumption of renewable energy. Aiming at the inadequacy of current optimization research in non-spinning-grade reserve, firstly, the dispatch mode and optimization model for non-spinning reserve on both the generation side and demand side are analyzed under the market mechanism. Then, a hybrid optimization method considering the differences and complementarities of spinning-grade and non-spinning reserve is proposed under multiple adequacy scenarios. Finally, detailed case studies verify the feasibility and effectiveness of the proposed optimization method.
Pre-acceleration of Protection for HVDC Transmission Lines
WANG Junsheng , LIU Huanzhang
2019, 43(9): 1-8.DOI: 10.7500/AEPS20190102001
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At present, the travelling wave principle based DC line fast protection used in high voltage direct current(HVDC)/ultra-high voltage direct current(UHVDC)projects has the shortcoming of low ability of enduring transition resistance. And the differential principle based slow-speed protection for DC line grounding fault with high transition resistance usually trips slowly. In the AC line protection, a pre-acceleration used in near power side can trip fast without any selection. Then this non-selective trip can be rectified by reclosing breaker. This paper introduces the concept of pre-acceleration into DC line fast protection and aims to fast protect DC line under grounding fault with high transition resistance. The DC line pre-acceleration can trip fast without any selection, and then this non-selective trip can be rectified by several measures such as blocking converter. This paper analyzes several problems after introducing pre-acceleration into DC line protection, and estimates the value of transition resistance under the fault. The simulation verification shows that the DC line protection with pre-acceleration level can trip and have a margin to distinguish the fault in outside zone within 2 ms under line-end grounding fault with 500 Ω transition resistance.
Adequacy Optimization for a Large-scale Renewable Energy Integrated Power System Part One Spinning-grade Reserve Optimization
WU Jun , XUE Yusheng , SHU Yinbiao , XIE Dongliang , XUE Feng , XU Jianbing
2019, 43(8): 101-109.DOI: 10.7500/AEPS20181023001
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Large-scale renewable energy generation connected to the grid requires support from system reserve capacity with immediate response of all grades. Wise allocation of instant spinning-grade reserve on the generation and demand side becomes a vital mission to balance the reliability and economy of power system. The core task of a market which encourages non-free use of reserve capacity is to purchase proper reserve capacity and reduce the total cost of the system by satisfying dispatch needs of all potential risk scenarios. To achieve this, the reserve values of every available reserve measure(RM)under all risk scenarios are estimated, and RMs or their combinations with high performance cost ratio are selected. Three series articles present a novel way to model and solve the multi-grade reserve optimization problem considering variant scenarios. As the first article in the series, on the basis of analyzing existing reserve optimization methods, a cost-performance ratio based spinning-grade reserve optimization method is proposed. Using the exhaustively searching method as the benchmark, the effectiveness of the proposed method is verified by comparing with the mixed-integer linear programming method. Simulation cases on systems with different scales also give the general picture about the efficiency and accuracy of the proposed method relative to its main competitors.
System-level Control Strategy for UPFC Power Grids Integrated with UHVDC
YANG Jian , SONG Pengcheng , XU Zheng , CAI Hui , XIE Zhenjian
2019, 43(10): 109-117.DOI: 10.7500/AEPS20180916005
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To alleviate the problem of line overload raised by the integration of ultra-high voltage direct current(UHVDC)transmission systems, and to enhance the voltage support strength of the AC bus of the UHVDC station, the sensitivities of line loads and AC bus voltage magnitudes to the control of unified power flow controller(UPFC)are deduced based on electrical network theories. Then, the feasibility of the active/reactive power flow control ability of the series converter and the reactive power control ability of the shunt converter to achieve line overload control and voltage regulation is analyzed. On this basis, a UPFC control strategy for power grids integrated with UHVDC is developed. Using this control strategy, the system-level settings of the UPFC are generated automatically based on current/voltage measurements. Finally, a case study is done in the Suzhou southern power grid of China, where the 500 kV UPFC project and Jinping-Sunan UHVDC transmission system are located. The effectiveness of control sensitivity analysis and the feasibility of proposed control strategy are verified in the case study.

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