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

{"title":"Short-Term Load Forecasting of Distributed Energy Supply System Based on Elman Neural Network","authors":"Bo Liu","doi":"10.1109/CICED.2018.8592018","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592018","url":null,"abstract":"Nowadays, the situation of energy utilization in the world is becoming more and more serious, and the environmental problems can not be ignored. How to achieve energy efficiency, environmental protection has become a global hot issue. Distributed energy supply system will become an important and effective way to realize the coordinated development of economy and energy. In the design of distributed energy supply system, the characteristics of distributed energy supply system are often not fully taken into account, which results in too large capacity selection of the unit, which can not reflect the superiority and benefit of the distributed energy supply system. Therefore, it is more important for the success of the project to carry out accurate load forecasting of cooling heating and power load. A method of load forecasting for distributed energy supply system based on Elman neural network is presented in this paper, in order to be able to predict the load more accurately.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124740779","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":"Study on Improving the Allowed Penetration Level of Distributed Generations by Utilizing the Distribution Network Reconfiguration Under Considering Network Loss","authors":"Wan Kuiyuan, Lian-xin Guan, Zhu Li, Li Jian","doi":"10.1109/CICED.2018.8592337","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592337","url":null,"abstract":"To maximize the consumptive ability of the distribution network to the distributed generations, an approach of improving the allowed penetration level by utilizing the distribution network reconfiguration under the condition of considering line loss is proposed. Models for calculating of distributed generations is introduced. And the mathematical model of distribution network reconfiguration with distributed generations is set up, in which, the sum of the reduction of the network loss and the admittance capacity of distributed generations after the distribution network reconfiguration is introduced as the index. Superior optimization algorithm is introduced to find out the best planning scheme of distribution network reconfiguration and the allowed penetration capacity of every distributed generation. Through the calculation of the IEEE33 node, the results show that the approach always have good effects to improve the allowed penetration capacity. When the load is greatly reduced, the allowed penetration capacity of distributed generations are compared before and after distribution network reconfiguration. And the results of which show that it is still feasible and effective to improve the allowed penetration capacity.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124791210","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":"Allowable DG Penetration Capacity Calculation of SNOP-based Flexible Distribution Network","authors":"L. Haishen, Zhang Kai, Lin Shengwei, Ge Leijiao, W. Qingbiao, Han Tao","doi":"10.1109/CICED.2018.8592392","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592392","url":null,"abstract":"This paper adopts a new type of power electronics - soft normally open point (SNOP) to solve the bottleneck problem of bus/branch in distribution network, and improve the DG penetration capacity in flexible distribution network (FDN). Firstly this paper establishes the optimization model of the allowable capacity of DG in the FDN. A multi-population genetic algorithm (MPGA) is used to get the global optimal solution, in both traditional distribution network and FDN. Then this paper builds the system model of IEEE 33-bus distribution network to verify the conclusion, which finally proves that the application of SNOP in FDN will allow more DG accessing to the network. What is more, this method has certain reference value to determine the optimal capacity and access location of DG in the future FDN.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128735382","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":"Reliability Analysis and Optimization Configuration of Distribution Network Based on Autonomous Control Unit","authors":"Ding Jian, Wang Kelong, Wu Jinyong, Ma Feng, Mao Chunlei","doi":"10.1109/CICED.2018.8592097","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592097","url":null,"abstract":"With the increase of distributed generation(DG) in distribution networks, the impact of these DGs in the power grid is also increasingly significant. In particular, with the development of intermittent DG which is more difficult to predict power generation, it challenges the reliability of the power grid. According to the characteristics of the grid with DG, this paper simplifies the distribution network to a system which takes autonomous control units(ACU) as the main component. Then the power grid is divided and classified into autonomous control regions(ACR) and calculates the reliability indices of different classes of ACR. And through the reliability index to establish an optimization model, eventually configure the system's DG capacity and improving the system's reliability.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129353352","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":"Studies on the Influence of Control Parameters of Under-Excitation Limiter in Brushless High-Initial-Response Excitation System","authors":"Ping-Jian Wang, Haozhe Liang, Z. Du, Zheng Yuan, Guihong Wu, Huan Xie","doi":"10.1109/CICED.2018.8592244","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592244","url":null,"abstract":"This paper invests the influence of the control parameters about superimposed under-excitation limiter (UEL), used in a brushless high initial response (HIR) excitation system. A single-machine infinite-bus model is derived by using the synchronous machine model with the brushless (HIR) excitation system model (IEEE Type AC2C) and a superimposed multisegment UEL. Based on the linearized model, the relation between the auxiliary damping torque (ΔMD2) provided by UEL and the pertinent parameters of UEL is extracted. With the damping torque analysis (DTA) technique, it is shown that the dynamic stability of the system can be affected by the value of the proportional gain (KP) and the internal gain (KI) of UEL. Then the time-domain simulations verify the conclusions of theoretical analysis.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129360171","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 Lyapunov-Function-Based Control for Three-Level Shunt Active Power Filter Using Feedback Linearization","authors":"Xunnan Zhu, Yong Wang, Juan Hu","doi":"10.1109/CICED.2018.8592592","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592592","url":null,"abstract":"The three-phase four-wire three-level neutral-point-clamped shunt active power filter (NPC-SAPF) is considered as an effective way to compensate harmonics generated by nonlinear loads in power system. In this paper, a Lyapunov-Function-based control using the decoupled NPC-SAPF state-space mathematical model is presented. An affine nonlinear model of NPC-SAPF is established in the synchronous d-q-0 frame. Applying state feedback linearization method to the affine nonlinear model, a linearized and decoupled NPC-SAPF mathematical model is obtained. The globally asymptotically stable NPC-SAPF control system is built by choosing an appropriate Lyapunov candidate function and making sure that the function satisfies the required properties of Lyapunov stability theory. Compared with the classic proportional integral (PI) control method, the proposed control strategy has larger bandwidth and better compensation performance. The simulation results proved the validity of the proposed control strategy.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129838793","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 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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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}