2018 China International Conference on Electricity Distribution (CICED)最新文献

{"title":"Research on Peak Load Optimization Model Considering Interruptible Load at Peak Time","authors":"Hong Hu, Guangfeng Bu, Xiang Yu, Bin Gu, Wei Che, Bingyue Peng, Chen Zhang, E. Song","doi":"10.1109/CICED.2018.8592493","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592493","url":null,"abstract":"As an important measure of demand response, the interruptible load can be equivalent to a virtual generation unit, which relieves the stress of power supply in peak period and decrease the frequency of start-up and shutdown for the peak shaving unit. An optimization model based on unit commitment is presented in this paper considering the available resources on both the power generation and demand sides comprehensively. It considers the ILH (interruptible load with high compensation) as a reserve participating in the peak shaving process. The model is divided into two parts. The outer layer determines the peak period in which the interruptible load can participate in system peak shaving by adjusting the amount of operating peaking unit. The inner layer considers the constraints such as the total interruption time, the number of interruptions, and the interruption amount for optimizing dispatch among multiple interruptible users during peak period. The results of calculation examples show that under the premise of ensuring the safe and stable operation of the system, the participation of ILH in the peak period of peak regulation can reduce the number of peaking units and reduce the system operation costs.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127357758","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 the Protection Range of Distance Protection Zone I for Short Transmission Line","authors":"Zhao Zhihong, Zhao Yue, Cheng Lei, Wang Bin, Huang Zhihua","doi":"10.1109/ciced.2018.8592250","DOIUrl":"https://doi.org/10.1109/ciced.2018.8592250","url":null,"abstract":"This thesis mainly analyzes the applications of distance protection zone I for short transmission line or weak-infeed. It demonstrates the calculation method of shortest length of transmission line that distance protection zone I can be applied at power source side and gives suggestions of setting calculation. Moreover, it analyzes the large error between measured impedance value and actual fault impedance, because distance protection zone I may work improperly when distance protection used for weak-infeed side.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127511938","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":"Measuring Method of Harmonics and Interharmonics Based on Ratio Correction and Matrix Inversion","authors":"Zhenxin Zhong, Yue Zheng, Chengcai Duan","doi":"10.1109/CICED.2018.8592578","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592578","url":null,"abstract":"With the power electronic devices densely connected to the power grid, it is easy to make the interharmonic which is close to the harmonic appear in the power system signals. When the frequency of interharmonic is close to that of harmonic, the spectrum of interharmonic will leak to the harmonic spectral line, and generate serious main lobe interference with the spectrum of harmonic, which will make the performance of current detection methods based on discrete Fourier transform or fast Fourier transform (DFT/FFT) algorithm invalid. Based on the specified signal processing recommendations by IEC61000-4-7, this paper proposes a ratio correction method based on the interharmonic leakage estimation to detect adjacent interharmonic and harmonic. Firstly, the characteristics of spectral interference between the harmonic and the interharmonic under fundamental frequency synchronous sampling are analyzed in this paper. According to the characteristics of the interharmonic leakage on each spectral line, the spectral values of interharmonic on the harmonic spectral line can be estimated by solving the spectral line equations, which are constructed by using the interharmonic spectral lines around the harmonic spectral line. And the frequency parameters of the interharmonic will be obtained by using the ratio correction algorithm. Secondly, considering the influence of the interharmonic spectral leakage on amplitude and phase detection, according to the estimated frequencies, the amplitude and phase parameters of each component can be corrected by using the incidence matrix inversion algorithm, which is constructed by the window spectral function. Finally, the theoretical simulation example and the practical simulation example analysis of the proposed method are carried out on the MATLAB simulation platform. The results show that the method proposed in this paper can effectively suppress the influence of the interharmonic spectral leakage, and it can rapidly and accurately detect the parameters of adjacent harmonic and interharmonic based on a limited data length of samples.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128955359","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":"The Tolerance of ASDs to Voltage Sags Based on Mechanical Analysis","authors":"Songhao Tang, S. Tao, Cong Chen, Xiangning Xiao, Na Yang","doi":"10.1109/CICED.2018.8592300","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592300","url":null,"abstract":"Based on quantifying the influence of voltage sags on adjust speed drivers, putting forward relevant suggestions and improvement measures have become important issues for power grid corporations, power consumers and manufacturers. In this paper, with the dynamic equations of DC circuit and dynamic equations of asynchronous drive, mechanism analyses of the sensitivity to internal (i.e. protection system, control strategies) and external (i.e. load and voltage sags characteristic indexes) factors on ASDs were carried out and proposed corresponding measures. Especially combined with undervoltage and overcurrent protection thresholds, the operating ranges under vector control and direct torque control strategies were obtained, which provided the theoretical reference for protection systems setting with different control strategies to voltage sags.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"10 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128958564","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 Unified Storage Technology of Multidimensional Historical Data of Substation Based On the Combination of Redis and SSDB","authors":"Ren Hao, Fan Guangmin, Wang Qiang, Guo Lingxu, Chen Jian, Zhang Pan","doi":"10.1109/CICED.2018.8592231","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592231","url":null,"abstract":"At present, there are multiple sets of information systems in substation, which are relatively independent, and exist some problems of repeated collection, low utilization rate and difficult data sharing. These systems contain not only “four remote” structured data, but also unstructured data such as waveform, model and graphics. There is no unified storage and access interface established which hinders the improvement of intelligent level of advanced applications. To solve the above problems, a unified storage technology of multidimensional historical data of substation based on Redis and SSDB is proposed in this paper. The system incldes the Redis proxy server and the SSDB storage cluster. In the proxy server, the SCADA historical data and the unstructured historical data of all substations in a region are stored in the key-value network cache library by the unified import tool supporting multi vendor and multi service history data. Then, through the proxy service program, the cache data is transferred to the distributed storage cluster. For each storage machine of the storage cluster, the cache data is stored in the disk file through the LevelDB storage engine, and the distributed permanent storage of the historical data is realized. The laboratory tests have proved that the functional requirements and performance index of the unified data storage system have reached the expected goal.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129293303","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":"Personal Electric Shock Situation Analysis Method for Distribution Network","authors":"Z. Ning, Feng Guang, Zhao Zimo, Yu Kun, Yu Mingqi, Zeng Xiangjun","doi":"10.1109/CICED.2018.8592377","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592377","url":null,"abstract":"Distribution network as a link between the power system and users, the safety and stability of its safe operation determines the reliability of the power supply of the majority of users and the personal safety of the distribution network. The distribution network has a complex structure, frequent ground faults, and frequent personal electric shocks, causing a series of serious consequences. Based on current information, human body impedance and electrophysiological responses, this article analyzes the human safety current. Three types of electric shock scene modeling and simulation were carried out for different distribution network electric shock situations. The corresponding fault currents and the situation in which the human body withstands current and voltage were analyzed. Under different environmental conditions, the relationship between faulty electrical quantity and personal injury level of distribution network under typical scenarios was verified by CDEGS simulation. The results will help to establish the distribution network technical parameters that take into account personal safety, and have a certain significance for future theoretical research and project implementation.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130945948","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":"Sishui No.2 Main Transformer Winding Fault Analysis","authors":"Yanhai Huang, T. Hai, Chenghao Lan, Jia-sen Zhu, Zhitong Liu, Yanjun Pang","doi":"10.1109/CICED.2018.8592508","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592508","url":null,"abstract":"Transformer Winding Fault is one of the main causes of Transformer damage. When a transformer has an outlet short-circuit accident, it flows through a large short circuit current in the transformer winding. The short circuit current generates electrodynamic force under the mutual action of the leakage magnetic field and can lead to failure of the transformer winding. Based on the analysis of the short circuit accident at the outlet of the No.2 main transformer in Sishui substation, it is very effective to judge transformer winding fault by combining the frequency response method of transformer windings with chromatographic analysis. In order to avoid the override trip accident, the cable should be changed to a fast fuse cabinet or a set of drop switches. In order to avoid the short circuit damage to the transformer, the manufacturer is required to provide the test report on the short circuit resistance of the transformer.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130451859","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":"Interaction Strategy of User Side Storage Devices for the Day-Ahead Dispatch of Distributed Integrated Energy Systems","authors":"Yuxiong Huang, Gengfeng Li, Z. Bie, Jiangfeng Jiang","doi":"10.1109/CICED.2018.8592364","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592364","url":null,"abstract":"Multi-energy complementarity is beneficial to reduce the operating cost and improve the reliability of energy systems. This paper presents an optimization framework for the day-ahead dispatch of distributed integrated energy system (DIES), to explore the interaction strategy of user side storage devices participating in the economic dispatch of DIES. Firstly, the model of DIES is established based on the concept of energy hub. Then, on this basis, the optimization model for the day-ahead dispatch of a DIES is built to achieve the lowest operation cost. Furthermore, the feasibility of the proposed method is validated by extensive cases studies. Results show that multi-energy complementary and energy storage devices can reduce the operating cost of energy systems effectively.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125339128","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 New Capacity Inspection Method for Distribution Transformer based on Big Data","authors":"Z.Y. Zheng, Z. Li, S.F. Yu, D. Ke, Z.J. Lao, J.Q. Lin, J.J. Chen","doi":"10.1109/CICED.2018.8592252","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592252","url":null,"abstract":"The quality of distribution network equipment is the basis of the construction of intrinsically safe distribution system, and the sample inspection of delivered equipment is an important means of the quality control of distribution network equipment. Centering on the problem that distribution transformer capacity is hard to be inspected accurately at present, this paper proposes a new capacity inspection method for distribution transformer based on big data. This paper accumulates a large number of test data of nearly one thousand distribution transformers from inspection work, and analyzes the distribution of volume, weight, DC resistance, no-load loss, load loss and short-circuit impedance of distribution transformer in different capacity levels through the statistical method, and finally makes a capacity assessment process. This method is simple, practical and reliable, and it can be spread and applied in production practice","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126715000","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":"Corona Discharge Characteristics for Conductors of HVDC Transmission Lines with Different Heights to Groud","authors":"Liang Jinxiang, Jiang Lin, Li Weidong, Pen Lei","doi":"10.1109/CICED.2018.8592569","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592569","url":null,"abstract":"The corona discharge characteristic of the conductor is one of the key factors affecting the electromagnetic environment of the project. In order to obtain corona discharge characteristics of conductors with different heights to ground and correction methods for inception corona voltage of conductors with different heights to ground, corona test were carried out in Ultra-high Voltage Test Base in Wuhan with ultraviolet image apparatus. the corona test of conductors of JL/G1A-1250/100 and JL/G lA-1250/70 at different heights to ground were carried out., one single conductor., 6-bundle conductor with bundle space 500mm and 8-bundle conductor with bundle space 550mm were tested separately. The results show that Under DC positive voltage., the corona inception voltage for conductors increased with the rise of the height to ground., different bundle distances., different bundle conductors and one single conductor corona discharge characteristics have some differences; The corona inception voltage between single conductor and different bundle distances conductors have certain functional relationship. By establishing the functional relationship between them., the corona inception voltage of bundle conductors can be calculated by the corona inception voltage value of a single conductor., the value of correction errors can be controlled at less than 13%.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126859781","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}