2022 IEEE 5th International Electrical and Energy Conference (CIEEC)最新文献

{"title":"Offshore Wind Power Grid-connected Technology Based on Self-starting System","authors":"Wang Liang, Liu Yanan, Cao Jiawei, Ding Ran, Yu Jian, Yang Chun, Chen Xi, Wu Xi","doi":"10.1109/CIEEC54735.2022.9846541","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846541","url":null,"abstract":"In view of the long period of the current offshore wind power project construction, a self-starting wind turbine grid-connected method is proposed, and a set of wind turbine grid-connected self-starting device is developed based on this method. Through this device, it is available to provide a stable power supply for the wind turbine through the submarine cable before the grid power on the land is delivered to the offshore substation. After the grid power is delivered, the wind turbines are directly connected to the grid, which greatly shortens the construction period of offshore wind power projects, creates considerable economic value. The technology had been applied in many offshore wind farms in Rudong, Jiangsu, and the field test data verified the advancement and effectiveness of the developed system and the proposed method.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121430888","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":"Suppressing Secondary Magnetic Field Radiation for IPT System Using Dual Detuned Receiving Loops","authors":"Ying Luo, Yi Song, Chenyan Zhu, R. Mai","doi":"10.1109/CIEEC54735.2022.9846298","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846298","url":null,"abstract":"With the power improvement of inductive power transfer (IPT) systems, severe eddy loss and heating caused by a strong magnetic field are inevitable. Simultaneously, a mass of ferrite cores is needed to avoid magnetic saturation, leading to the increase of system weight and volume. This work proposes an IPT system with LCC-dual detuned series (LCC-DDS) topology, which can suppress the secondary magnetic field by generating two nearly reverse magnetic fluxes. Besides, the phase difference between dual receiving currents is optimized via finite element simulations to achieve a minimum average magnetic flux density ($B_{text {ave}}$) in the receiver core. Simulation results reveal that the $B_{text {ave}}$ of the receiver core in a traditional tuned LCC-Series (LCC-S) IPT system is four times higher than that in the LCC-DDS IPT system. Experiment tests are conducted on the LCC-DDS and LCC-S IPT systems at a 540W transfer power, respectively. The core temperature of the LCC-DDS system is 36.4 °C, while that of the LCC-S system is 42.2°C after a 10-minute operation. It indicates that the proposed method can suppress the magnetic field efficiently.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114309096","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":"Digital Simulation and Automatic Test of Source Network Load Storage Cooperative Control","authors":"Xu Peng, Chen Jinshan, Li Feng, Mao Wenbo","doi":"10.1109/CIEEC54735.2022.9846853","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846853","url":null,"abstract":"Source network load storage cooperative control has gradually become a new trend of power grid dispatching control in the future, but the effect of its control strategy is uncertain. At present, there is a lack of realistic digital simulation and fast test methods. This paper constructs a set of automatic test method for source network load storage collaborative control. The method includes generating the continuous operation simulation of provincial multi-level power grid and the simulation operation environment of new energy, storage, flexible load and other equipment. On this basis, it constructs the image of regulation system and the automatic test control framework with reusable test services. A new mode of one click, automatic and efficient testing of source network load storage cooperative control software deployed on the mirror system is realized. An example shows that the test method can give the effectiveness index of software strategy, and the test time is greatly shortened.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114531831","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":"Transformer Mechanical Condition Assessment Method Based on Improved Grey Similarity Correlation","authors":"Ju Ping, Zhang Hongru, Liu Yuesong, Lian Qingquan","doi":"10.1109/CIEEC54735.2022.9845981","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9845981","url":null,"abstract":"Transformer mechanical condition assessment methods based on transformer vibration signals have received a lot of attention due to their non-stop, safe and other characteristics. At present, many studies of transformer body vibration signals are based on their amplitude, which has a high mistaken judgment rate. At the same time, for different loads and types of transformers, their single frequency varies widely, making it difficult to reflect the mechanical condition of the transformer effectively. In this paper, the energy share of the vibration signal is calculated in frequency bands according to the vibration characteristics of the transformer body to reduce the influence of signal fluctuations in low frequency bands on the assessment of the mechanical condition. Combining the energy distribution and frequency components of the vibration signal in different frequency bands, an improved grey similarity correlation is used to assess the mechanical condition of the transformer.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116487804","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":"Numerical simulation of output short-circuit capacitor discharge of intrinsically safe switching transistor converter","authors":"Dangshu Wang, Jiaan Yi, Z. Qiang, Yulong Guo, Jiatong Zhao, Yingying Shen, Siqin Liu","doi":"10.1109/CIEEC54735.2022.9846098","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846098","url":null,"abstract":"When the intrinsically safe switching converter adopts the IEC spark experimental device for opening and closing explosive test evaluation, the output circuit can be equivalent to a capacitor circuit. In order to study the micro characteristics in the process of short-circuit discharge, the capacitor circuit is equivalent to the same amount of charge according to the law of charge conservation, A two-dimensional plate-to-plate electrostatic model with tungsten wire as anode and cadmium disk as cathode in explosive gas gap is established by particle method (PIC / MCC). The discharge processes of dielectric breakdown, spark discharge and spark maintenance are simulated, and the correctness and feasibility are verified. By analyzing the number of charged particles, the spatial distribution of particles and the change of electric field intensity in the electrode gap, the discharge process of the first three stages of capacitor short-circuit discharge is explained. It is found that the dielectric breakdown in the discharge process of capacitor circuit is only related to the electric field intensity formed by the plate voltage in the electrode gap. When the field enhancement factor is 100 and the field strength is greater than 2x107 v/m, there is field emission between the electrodes, and the electrode gap can be broken down. The critical breakdown spacing of the electrode plate is 1.2um During the discharge process, the number of electrons in the gap first increases rapidly, then increases slowly, and then decreases slowly after reaching the peak. When the external capacitance is greater than lpF, the number of electrons increases by 1X10? for every 10pF increase. Based on the flat two-dimensional model, this paper analyzes the change trend of electric field in the discharge process, and obtains that the electric field intensity of capacitor in the spark maintenance stage is a fixed value, which is independent of the capacitance value. When the electric field intensity is 9x106 v/m, the voltage will not drop and maintain at 9V, and the capacitor discharge is in the spark maintenance stage.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121497365","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":"Design of DSOGI-PLL for Power Converters Tied to Fractional Frequency Transmission System","authors":"W. Pan, Xiaodan Wu","doi":"10.1109/cieec54735.2022.9845998","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9845998","url":null,"abstract":"Fractional frequency transmission system (FFTS) is a promising solution for integrating large-scale wind energy into power systems. In FFTS, the grid frequency is much less than the typical 50 Hz or 60 Hz. Therefore, the phase-locked-loop (PLL) designed for power converters used in traditional systems could not be suitable in FFTS. This paper proposes the design of dual second-order generalized integrator (DSOGI) based PLL, so as to achieve satisfactory dynamic and steady-state performance. The accurate small-signal model is firstly built. Then the optimal parameters are obtained to achieve fast dynamic responses with small transient oscillations. Simulation results have verified the superior performance of the designed DSOGI-PLL.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121618514","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":"Dynamic State Estimation for The Low-Carbon Integrated Electricity-Heat-Gas System","authors":"Yuan Yao, Yinliang Xu, Wai Kin Victor Chan, Yuzhu Zeng","doi":"10.1109/CIEEC54735.2022.9846011","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846011","url":null,"abstract":"The integrated energy system (IES) concept has been proposed in recent years to efficiently lower the whole system’s operation cost and carbon emission. The uncertainty and volatility of various sources pose challenges to identifying and maintaining the normal state of the IES during daily operation. This paper proposes a dynamic state estimation model for the integrated electricity-heat-gas system based on the Kalman Filter. By applying the finite difference method, the partial differential equations that describe the dynamic characteristics of gas and heat are transformed into a set of algebraic equations. Then, the discrete-time system equations of IES are developed. Finally, the Kalman filter is applied to establish the dynamic state estimation model of IES. Simulation results verify the effectiveness of the proposed method.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121653105","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":"Segmental PWM Variable Duty Cycle Control of Switched Reluctance Motor Based on Current Chopping","authors":"Wu Yuliang, Huang Chaozhi, Cao Wensheng, Dai Lixiang","doi":"10.1109/CIEEC54735.2022.9846743","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846743","url":null,"abstract":"The switched reluctance motor generally adopt current chopping control at startup or at low speeds, but the problem of large torque ripple occurs in actual control. This paper analyzes the causes of torque ripple under current chopping control, and proposes a subsection PWM variable duty cycle control method based on current chopping. This control strategy adjusts the excitation voltage of the winding by changing the PWM duty cycle, and is segmented according to the inductance characteristic curve, and uses different PWM duty cycles in areas where the current rate of change is different. In this paper, a three-phase 6/20SRM simulation model is established through Matlab/Simulink, and the optimal duty cycle at different speeds is obtained through simulation, and the functional relationship between the duty cycle and the motor speed is fitted. Through simulation analysis, the control strategy in this paper has significantly reduced torque ripple at different speeds compared with traditional current chopping control, which shows that the control strategy in this paper has a significant effect on suppressing torque ripple and has good dynamic performance.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121670498","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":"Backstepping Sliding Mode Control for Turntable Friction Compensation Using Stribeck Model and Extended State Observer","authors":"Xin Wang, Bo Wang, Hairong Ye, Kai Liu, W. Hua","doi":"10.1109/CIEEC54735.2022.9846836","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846836","url":null,"abstract":"Friction nonlinearity generally exists in turntable systems, which may reduce servo performance severely. To improve tracking performance of non-direct driven turntable system, a backstepping sliding mode control (BSMC) method with compensation based on stribeck friction model is proposed in this paper. Identification of friction model parameters uses particle swarm optimization (PSO) algorithm, extended state observer (ESO) is added to control pattern to improve the chattering brought by sliding surface switching process. The stability of system with BSMC is guaranteed by Lyapunov theory. BSMC and its performance are validated by comparative experiments, the results of experiment demonstrate that the proposed method can realize better accuracy and stability than traditional proportional-integral (PI) controller.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114793941","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":"Discussion on 5G Business Model in Power Industry","authors":"Song Wang, Jiansong Qin, Xuanwei Qi, ZhiKun Yan, Ming He, Yuting Liu","doi":"10.1109/cieec54735.2022.9846465","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9846465","url":null,"abstract":"5G has the characteristics of high speed, low delay, interconnection of all things and low power consumption. The application requirements of the power industry are highly matched with the technical characteristics of 5G. The three technical features of 5G provide differentiated network service capabilities for different businesses of the power grid, and bring new opportunities for the transformation and upgrading of the power industry. 5G mobile communication technology has a wider range of applications. The application of relevant technologies in the power communication system can improve the shortcomings of the power communication system and bring far-reaching changes to the power industry. This paper introduces 5G and its application in power industry, analyzes the characteristics of business model, and further discusses the business model of 5G in power industry.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124345071","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}