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International Conference on Advanced Power System Automation and Protection (APAP)
2019 IEEE 8th International Conference on Advanced Power System Automation and Protection (APAP)
21-24 Oct. 2019
Showing 1-25 of 352
Proceedings
The proceedings of this conference will be available for purchase through Curran Associates.
Advanced Power System Automation and Protection (APAP), 2019 IEEE 8th International Conference on
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Harmonics Frequencies Impedance Estimation Based on Least-square method
Publication Year: 2019,Page(s):11 - 15
This paper presents an approach to estimate the grid impedance at fundamental as well as harmonics frequencies. The required measurements are voltage and current at the point of common coupling (PCC) under normal operating conditions. The source voltages are also estimated simultaneously. The estimation method is based on Least Squares (LS), using the Orthogonality Principle in complex Hilbert spa...Show More
Field Test Method for DC Protection Equipment of HVDC by Secondary Signal Simulating
Jinbo Wu;Siyuan Guo;Quan Hong;Hao Xu;Hui Li;Weijun Zhu;Fan OUyang
Publication Year: 2019,Page(s):16 - 20
Cited by: Papers (1)
The field test for these has not been implemented regularly due to lacking simple and feasible method. This paper proposed a novel field test method for DC protection equipment of HVDC by secondary signal simulating with low security risk and low cost. It is not need to remove the equipment and explain the photoelectric conversion protocol. The field test device for DC protection equipment of HVDC...Show More
Fault analysis of pole-to-pole short-cicuit on the flexible AC-DC hybrid distribution network
Publication Year: 2019,Page(s):21 - 25
Cited by: Papers (3)
The stable operation of the flexible AC-DC hybrid distribution network is inseparable from the support of relay protection technology, while the in-depth analysis of different types of faults will lay the foundation for the selection of relay protection schemes. This paper introduces the current situation of fault analysis of flexible AC-DC Hybrid distribution network, and set up a model of radiat...Show More
Study on Requirement of Control and Stability with Renewable Energy Generation Grid Integration
Li Yan;Qin Xiaohui;Chi Yongning;Tian Xinshou;Sun Sujuan;Zhuang Shenglun;Kong Xiangmei;Shi Lei
Publication Year: 2019,Page(s):26 - 30
Cited by: Papers (9)
Renewable energy generation has different static and transient characteristics than traditional synchronous power plants. The connection of renewable energy to the grid will have varying degrees of impact on the voltage stability of the local power grid. In a power grid with large renewable energy penetration, in addition to the voltage stability problem, renewable energy integration changes the o...Show More
Identification of Vulnerable Links in Power Grid Based on Brittleness Theory of Complex System under Geomagnetic Storm Conditions
Xiaoning Kang;Yagang Zhang;Xinyue Zhang;Yini Xu;Xiaoyu Li;Hao Zhou
Publication Year: 2019,Page(s):31 - 35
Cited by: Papers (1)
Geomagnetic disturbances will induce GIC (Geomagnetically Induced Currents) in high voltage power grid. GIC can cause cascading failure in power system, resulting in power system collapse or blackouts. In this paper, the mechanism of cascading failure in power system under geomagnetic storm is analyzed, and a vulnerable link identification process based on brittleness theory of complex system unde...Show More
Harmonic Suppression Scheme of L-type New Energy Grid-connected Inverter Based on Harmonic Injection Method
Jiangbo Chen;Weihang Li;Jin He;Hanjie Ji;Yangmin Feng;Peihao Yang
Publication Year: 2019,Page(s):36 - 39
Cited by: Papers (5)
As a new energy generation technology, photovoltaic power generation has been widely used. However, in the process of grid-connected photovoltaic power generation, due to the switching characteristics of the inverters, the output current usually contains low-order harmonics, of which the 5-order and 7-order low-order harmonics are the most serious. In order to restrain low-order harmonics in grid-...Show More
Transient Voltage and Reactive Power Response Analysis of Power System Considering Geomagnetic Storm
Publication Year: 2019,Page(s):45 - 50
In the condition of strong magnetic storm, geo-magnetically induced current (GIC) flowing through the neutral point of the transformer, causing the increase of reactive power loss of the transformer, which leads to overload of the reactive power compensation device, drop of the bus voltage and occurrence of a chain fault, which in turn causes a blackout of the system. Considering the suddenness of...Show More
Fault Location on Parallel Transmission Lines as Influenced by Mutual Effect
Publication Year: 2019,Page(s):51 - 58
Fault location on one of two parallel lines is determined as a percentage of line length in presence and absence of the mutual effect between lines. The methodology for fault location is based on the principle that at the fault Ef1+Ef2+Ef0 = 0. This relation is utilized to determine the sequence voltages at the relay position, where the impedance to fault location can be assessed. This makes it po...Show More
Impact of Pole-to-ground Faults on Transformer DC Magnetic Bias and Differential Current Protection in Hybrid AC/DC Power Grids
Zhihui Dai;Hong Cao;Yongxing He;Ningning Liu;Cheng Zhang;Huaibo Su;Liangdong Qin
Publication Year: 2019,Page(s):59 - 64
Pole-to-ground faults in hybrid AC/DC power grids may result in DC-bias voltage on AC side of the MMC. If the transformer is YNd11 connected, or Dyn11 connected with small grounding resistance, the DC current caused by the fault will pass the transformer and lead to DC magnetic bias, which would further produce the magnetizing inrush current and the malfunction of differential current protection o...Show More
There were some failures of DC voltage transducer for HVDC (UHVDC) links in the past decades. The failure of the transducer caused the fluctuation of DC voltage measurement which resulted in frequent adjustment of the firing angle and transformer taps, and finally shut down the valves. So, the state monitor of DC voltage transducer is necessary. The paper presents a scheme which makes use of DC fi...Show More
HVDC has the advantages of lower cost and stronger controllability, and has been widely used in the optimal configuration of renewable energy and asynchronous interconnection of power grids. The protection of HVDC transmission lines has also become a hot topics. This paper proposed a novel boundary protection for HVDC line. Based on the traveling wave's attenuation effect by the line, the fault ar...Show More
A Strategy of DC Fault Ride Through and capacitor voltage balancing for Hybrid Modular Multilevel Converter (MMC)
Publication Year: 2019,Page(s):80 - 84
Cited by: Papers (5)
The structure of hybrid modular multilevel converter (MMC) combines half-bridge submodule (HBSM)s and full-bridge submodule (FBSM)s. Compared with half-bridge MMC, the hybrid topology has fault-through capability against a solid DC side fault. In contrast with full-bridge MMC, the topology saves a large amount of cost and power loss since it reduces the number of diodes and IGBTs a lot. This paper...Show More
A pilot protection scheme for UHVDC lines based on backward traveling-wave difference
Hong Cao;Min Xie;Zexin Zhou;Xingguo Wang;Bin Yu;Dingxiang Du;Haigang Wang;Tongwen Wang;Yang Yu
Publication Year: 2019,Page(s):85 - 90
Cited by: Papers (2)
As a backup protection for HVDC lines, legacy current differential protection needs long time delay to avoid the influence of distributed capacitor current under external faults. A new protection principle is proposed based on the fact that under internal faults, the backward traveling wave at the side away from the fault point and the forward traveling wave at the side near the fault point will n...Show More
Study on Distributed Generation to Improve Stability of Distribution Network Based on Virtual Synchronous Generator Technology
Li Yan;Tian Xinshou;Hu Juan;Zhang Zhankui;Yu Hui;Xiong Xiong;Wu Ming;Ma Wenyuan
Publication Year: 2019,Page(s):98 - 103
Cited by: Papers (1)
The distributed integration and local consumption of distributed generation represented by wind energy and solar energy have attracted widespread attention. In recent years, distributed generation has developed rapidly, but at the same time, many new problems have emerged. These problems have threatened the safe and stable operation of power systems in some extent. Compared with the traditional sy...Show More
A new protection principle of Modular Multilevel Converter Based High Voltage Direct Current transimission lines using series inductance voltage of one-end converter
Publication Year: 2019,Page(s):104 - 108
Modular Multilevel Converter Based High Voltage Direct Current (MMC-HVDC) technology has been developed rapidly. However, the fault of DC line is the key problem of the safe operation of MMC-HVDC transmission system. In engineering practice, series small inductance is installed at both ends of MMC-HVDC transmission line, which creates favorable conditions to solve the problem of DC line fault in M...Show More
Analysis to Influences and Countermeasures of Non-periodic DC Component on Line Protection
Publication Year: 2019,Page(s):109 - 114
Cited by: Papers (1)
This paper analyzes that the non-periodic DC component may cause the circuit breaker to fail to isolate the fault when the internal fault occurs. For this typical accident, the scheme of accelerated inter-tripping the opposite after auto-reclosing, single-phase auto-reclosing check three-phase live voltage, cooperating of re-closing time on both sides and the permanent fault detection of single-ph...Show More
Fault Cause Identification Method Based on Multi-Source Information Fusion for UHVDC Transmission Lines
Rongqi Fan;Jing Li;Ning Ge;Kuan Li;Zhiyuan Wang;Huanhuan Yin
Publication Year: 2019,Page(s):115 - 119
This paper proposes a fault cause identification method based on multi-source information for UHVDC transmission lines. The multi-source fault information used in this paper includes voltage, current,weather, season, time period, terrain and historical fault information. Firstly, the method analyzes multi-source fault information to extract fault features. Then, the BP neural network is used to fu...Show More
A Transient Stability Assessment Method Using LSTM Network with Attention Mechanism
Xu Wang;Qian Zhou;Cheng Huang;Shiwu Liao;Yefeng Jiang;Yaming Ge
Publication Year: 2019,Page(s):120 - 124
Cited by: Papers (4)
the operation environment of modern power system is complicated, which puts high requirements for transient stability assessment. Recently, the machine learning method based on data analysis has been widely studied. However, most of the research is insufficient in processing the information of features and underutilized in the data mining capacity of learning machine. In this paper, the time serie...Show More
Research on the Application of Smart Substation Area Protection
Chuankun Ni;Ruisheng Li;Maojun Deng;Xu Li;Wenzheng Li;Yaxin Su;Baowei Li
Publication Year: 2019,Page(s):125 - 129
Cited by: Papers (1)
The outline of the national grid corporation's relay protection technology is proposed to study the substation area protection based on the multi-interval information of substation to improve the backup protection performance. In this paper, in order to reduce the action time of the line distance II period of backup protection, the location of line fault is identified by using the sampling at each...Show More
Study on Suppression Measures for Voltage over-limit of Distribution Network With Small Hydropower Group
Publication Year: 2019,Page(s):130 - 134
Cited by: Papers (2)
Small hydropower groups connected to the distribution network and operated in reverse power state will cause voltage over-limit in the key nodes and some nodes of grid. Through the analysis of the power system voltage regulation principle, four voltage regulation measures such as adjusting the generator voltage, changing the transformer ratio, performing reactive power compensation, and optimizing...Show More
Aiming at the problem of unreasonable setting of action characteristic circle in Electrode line impedance supervision (ELIS), a new method based on support vector data description (SVDD) to reasonably set action characteristic circle is proposed, which can realize high-precision fault diagnosis of ground electrode line. Through the analysis of impedance characteristics of ground electrode line dur...Show More
Application of Term Library Construction Based on Machine Learning and Statistical Method in Intelligent Power Grid Custom Service
HongYing ZHAO;Yang YU;JinQiu ZHANG;Jun ZHU;YouLang JI;ZhenDong DU;QingChen WANG
Publication Year: 2019,Page(s):145 - 149
Intelligent power grid custom service, providing power supply and consumption information directly to users, is the intermediary of direct communication between the power grid and users. While there are two major barriers, technical terminology and regional dialect, to achieving information interaction between the power grid and users. In this paper, a term recognition method based on machine lear...Show More
Research on Measurement Technology of Transformer No-load Loss Based on Internet of Things
Publication Year: 2019,Page(s):150 - 153
Cited by: Papers (5)
Power transformer is a key equipment in power grids, whose reliability directly affects the safety of power system. The defect of transformer core or windings can increase losses and lead to transformer heating, affecting its stable operation. The no-load loss of transformer reflects the status of iron core and windings. Generally, it is measured through off-line no-load test, which is difficult t...Show More
Single-phase Adaptive Reclosure Scheme Using Impedance Property of Fault Loop in Shunt-reactored Transmission Lines
Publication Year: 2019,Page(s):154 - 157
Cited by: Papers (2)
In AC/DC hybrid system, unsuccessful auto-reclosing in single-phase faults in AC side may cause continuous commutation failure, an adaptive single-phase reclosure scheme is proposed using the impedance property of the fault loop in transmission lines. The impedance is determined by the terminal-voltage of the fault phase and current of the ground capacitance. In transient faults with extinguished ...Show More
Research on Guideway Magnetically Coupled Mechanism for Dynamic Wireless Charging System
Publication Year: 2019,Page(s):158 - 163
In recent years, as an important supplement to the wired charging method, the application field of wireless Charging technology has been expanding and has great development prospects. The magnetic coupling mechanism is one of the most important components of the entire wireless energy transmission system. In this paper, a kind of rail-type magnetic coupling mechanism of "work" type is designed bas...Show More
Proceedings
The proceedings of this conference will be available for purchase through Curran Associates.
Advanced Power System Automation and Protection (APAP), 2019 IEEE 8th International Conference on
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