Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering最新文献

{"title":"Oscillation and The Suppression Strategy in Microgrid: A Review","authors":"Zheng Lan, Wei-Zhe Jiang, Changmao Hou, W. Diao","doi":"10.1145/3386415.3387028","DOIUrl":"https://doi.org/10.1145/3386415.3387028","url":null,"abstract":"As people's demands for the environment and future development, new energy sources such as wind energy, and solar energy have become the trend of the times. At the same time, due to the introduction of clean energy, power electronics and switching devices in the power system are heavily invested in the power network. The investment in areas above has made the stability of the power system suffering more tests, and the instability and oscillation of the power system have intensified. Therefore, this paper first analyzes the mathematical model of power system oscillation. The existing oscillation causes and suppression methods of traditional power systems are summarized. Then the causes of the micro-grid oscillation of the distributed power supply with high permeability are analyzed in detail. The difference from the traditional power system oscillation is that the traditional power network oscillation is caused by the shafting torsional vibration of the rotating electrical machine. The vibration reacts, which may cause the damping torque of the unit in the corresponding torsional vibration mode to weaken or even become negative, causing oscillation. Or rotary electric machines (including synchronous/asynchronous power generation/motors) and power electronic converters may exhibit an \"induction generator/negative resistance\" effect on the electrical oscillation mode under certain operating conditions, when the negative resistance exceeds the total positive resistance of the grid, resulting in The LC oscillates and diverge. The reason for the power electronic oscillation is the coupling oscillation between the power electronic converters or the network generated by the interaction with the AC grid. This kind of oscillation is difficult to find the existing fixed model to apply, because the power electronic device has a fast response speed and low Inertia, unlike traditional motors, oscillations are more likely to occur in high frequency bands and have more features. Based on this, different research methods and speculations on the causes of microgrid oscillations at home and abroad are summarized. Due to different causes, the methods used to suppress system oscillations are summarized and described. Finally, the content of the full text is summarized. Prospects for the future development of microgrid oscillation research.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131982430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Grid-Connected Photovoltaic Multi-Point Optimization Based on Genetic Algorithm","authors":"Tingting Xu, Yi Long, Chunyang Wu, Huicai Wang","doi":"10.1145/3386415.3386996","DOIUrl":"https://doi.org/10.1145/3386415.3386996","url":null,"abstract":"With the increase of photovoltaic (PV) installed capacity, the topology and operation mode of the existing distribution network have been changed, which poses new challenges to the economic operation of the distribution network. The multi-point grid-connected optimization of PV is an important means to ensure the economic operation of the system. In this paper, the influence factors on system power loss caused by grid-connected PV are studied. Then, with reducing system power loss as the target, a grid-connected PV multi-point optimization scheme based on improved genetic algorithm and chronological power flow (CPF) analysis is proposed. Based on IEEE 118 bus system, the proposed scheme is verified by Matlab/Matpower simulation platform. The simulation result shows that the optimization scheme can effectively reduce the system power loss and improve the economy of system operation, which has practical application value.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134271689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Hydrodynamic Characteristics and Dynamic Response of a New Type of Single Point Mooring Suspended Current Power Generation Device","authors":"Gen Li, Haifeng Wang, Pengfei Ma","doi":"10.1145/3386415.3387015","DOIUrl":"https://doi.org/10.1145/3386415.3387015","url":null,"abstract":"Based on the potential flow theory, this paper studies the hydrodynamic performance of a single point mooring suspended current power generation device by using the hydrodynamic software AQWA, and obtains the frequency-domain characteristic curves of the RAOs (Amplitude Response Operators) of each degree of freedom under the conditions of different wave direction angles and different height of gravity center. According to the results of frequency-domain analysis, considering the loads of wave and current, the time-domain coupling analysis of this single point mooring suspended current power generation device under the given sea condition is carried out, and the motion response of the system in irregular waves and the change of mooring line tension are studied. The results show that the peak value of the RAOs of surge and pitch first decreases and then increases with the increase of the wave angle. When the wave angle is small, there will be a large surge and pitch motion; the yaw motion mainly shows the low frequency resonance with the wave. The small variation of the height of the center of gravity can reduce the roll motion, but the influence is small. In a given sea condition, the single point mooring system can keep the current power generation device stable, but the RAO of yaw is large, which may affect the performance of the Savonius blade. The safety factor of mooring line is large, which can ensure the safety and reliability of power generation device.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128923824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on High Fidelity Cluster Encrypted Transmission Method for Marine Target Detection","authors":"Na Qi, Jin-Ping Li, Xiaofei Jiang, Hao Yang, Chang-Sheng Lv","doi":"10.1145/3386415.3386948","DOIUrl":"https://doi.org/10.1145/3386415.3386948","url":null,"abstract":"A high fidelity cluster encryption transmission method for sea target detection is proposed. The disadvantage of relatively complex processors and slow encryption speed for software encryption on the ocean. The characteristics of information realtime and miniaturization in practical application can not be satisfied. This paper focuses on the fusion and encryption and coding of target information, Reliable and safe transmission of target information at sea can be achieved with high precision underwater acoustic detection module and high speed processor of FPGA and combined with RSA digital encryption algorithm. Finally, display in data terminal interface. Through simulation experiment, the test results show that the method collects the orthogonal vector underwater acoustic signal and boost underwater acoustic signal with zero time difference, and synchronized wireless transmission of signals to host computer by cluster encryption together with magnetic signals. The method can achieve high precision and high fidelity target information restoration.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"59 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132938603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review","authors":"Yue Han, Weihong Han, Shudong Li","doi":"10.1145/3386415.3386969","DOIUrl":"https://doi.org/10.1145/3386415.3386969","url":null,"abstract":"In response to the explosive growth of the Internet's information volume, how to discover and track changes in social media has gradually become a key issue in the field of data mining. Especially, how to find the popular and hot topics has become an important issue in social network analysis. In this paper, we review the topic models applied into the social network analysis. At this stage, this kind of problem is mainly solved by the method based on evolutionary clustering. The method can be subdivided into two methods: the topic model and the matrix/tensor decomposition model. This article focuses on the analysis of a class of the most important Latent Dirichlet Allocation (LDA) model from the topic model, as well as a variety of topic models derived from the LDA model, and a brief discussion of future research directions.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114342565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overview of Control and Matching Design of Hydraulic Retarder","authors":"Zhenchuan Song, Huiyuan Li, Ming Xu","doi":"10.1145/3386415.3387071","DOIUrl":"https://doi.org/10.1145/3386415.3387071","url":null,"abstract":"With the improvement of vehicle driving safety and comfort requirements, the use of hydraulic retarder in medium and heavy vehicles is more and more common. In order to adapt to different vehicle parameters, matching design should be carried out for specific vehicles. In order to meet the controllable requirements of braking torque under different loading and road conditions, it is necessary to regulate and control the braking torque of retarder within a certain range. In this paper, the control and matching design of hydraulic retarder are analyzed and summarized through relevant literature and practical application.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116999386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Object Oriented Algorithm for Road Extraction in High-Resolution Remote Sensing Image","authors":"Yuan Fang, Qifeng Che","doi":"10.1145/3386415.3386963","DOIUrl":"https://doi.org/10.1145/3386415.3386963","url":null,"abstract":"In view of the characteristics of high-resolution remote sensing images, an automatic road extraction method based on object-oriented thought was proposed. Firstly, the remote sensing image is bilaterally filtered to smooth the details and retain the road edge information. Then, the image is segmented by the FCM algorithm to obtain independent ground objects, and the candidate road segments are obtained by filtering each object according to the geometric features of the road. The regional growth algorithm is used to form the road network, and finally the morphology method is used to finish and refine the road network. Experiments show that this method can effectively extract road targets from remote sensing images of different scenes without manually selecting road seed points.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123991763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristic Analysis of Inertia and Damping of Directly-Driven Wind Generator System","authors":"Shengqing Li, Yu Jiang, Donghui Zhang","doi":"10.1145/3386415.3387050","DOIUrl":"https://doi.org/10.1145/3386415.3387050","url":null,"abstract":"When extensive direct-drive wind turbines connected to the grid, the grid frequency of systems may be unstable. The inertia and damping levels of traditional power systems, mainly thermal power and hydropower, are gradually weakened. For the sake of discussion causes of inertia and damping. Taking the direct-drive wind generator system as the research target, the DC voltage time model with wind inertia control is established. Drawing on the thought of multi-time scale moulding, the electrical torque analysis means is used to consider the inertia damping characteristics of the direct-drive wind power grid-connected system. Single machine infinite grid connection simulation model is established and tested to verify the feasibility of the DC voltage time model with wind inertia control.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126177827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A High Speed Clock Receiver for DAC with Cross point and Duty Cycle Adjustable Capability","authors":"Jun Liu, Xianjie Wan, Mingyuan Xu, Youhua Wang, Yi Ding, D. Fu","doi":"10.1145/3386415.3387009","DOIUrl":"https://doi.org/10.1145/3386415.3387009","url":null,"abstract":"This paper introduces a kind of high speed clock receiver for DAC with cross point and duty cycle adjustable capability. In this paper the circuit realizes cross point and duty cycle adjustable function by changing the node common-mode voltage in the signal path with different ways. It can obtain the satisfying cross point and duty cycle through the negative feedback loop. In the post simulation the cross point of the output clock signal meets the design requirements, and the duty cycle is adjusted from 45% to 50.09%. So the error from the target value is less than 0.1%.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129474880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Improved Spatial Power Load Forecasting Method Based on Land Utility and Development Time","authors":"Jianli Huang, Renhai Feng, Yuanbiao Xue","doi":"10.1145/3386415.3386983","DOIUrl":"https://doi.org/10.1145/3386415.3386983","url":null,"abstract":"Traditional spatial load forecasting method involves large volume of information, high model complexity. As a result, prediction accuracy and speed are difficult to guarantee. Considering land utility and development time, this paper proposes an improved spatial load forecasting method based on the logistic regression. In this improved method, regional load forecasting problem is splited into two subproblems: parameter estimation of gridded partition and integrated forecasting of logistic model. Parameter estimation scheme is based on development speed and the median year. The complexity of load forecasting is reduced by maximum likelihood estimation of the improved logistic regression. Simulation result shows that proposed method (PM) is superior to the traditional method (TM) in simplifying calculation complexity and improving prediction accuracy. PM can be effectively applied to regional load forecasting.","PeriodicalId":250211,"journal":{"name":"Proceedings of the 2nd International Conference on Information Technologies and Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129687940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}