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Harmonic Stability Analysis and Damping Strategy for DC system of MMC-HVDC Across Wide Frequency Range MMC-HVDC直流系统宽频域谐波稳定性分析及阻尼策略
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697522
L. Kou, Yixuan Peng, Ke Ji, Lin Zhu, Feng Ji, Dong Liu
{"title":"Harmonic Stability Analysis and Damping Strategy for DC system of MMC-HVDC Across Wide Frequency Range","authors":"L. Kou, Yixuan Peng, Ke Ji, Lin Zhu, Feng Ji, Dong Liu","doi":"10.1109/POWERCON53785.2021.9697522","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697522","url":null,"abstract":"The harmonic resonance and instability problems become prominent in recent years with the development and application of modular multilevel converter (MMC) based HVDC system. The impedance model of MMC can be used to facilitate the analysis of harmonic stability and the design of mitigation method. In this paper, the accurate dc impedance model of MMC is firstly derived based on harmonic state space (HSS) method. The internal dynamics and control actions (control loop delay included) of MMC are considered in the derivation process. With consideration of impedance characteristics of dc transmission lines, the harmonic stability for the dc system of MMC-HVDC are theoretically analyzed across a wide frequency range and the possible harmonic resonance problems are revealed. On this basis, a modified dc damping control is proposed to mitigate the harmonic resonances and improve the harmonic stability at all possible frequency points. At last, the proposed model and control method are validated by simulation results.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128186988","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}
引用次数: 0
Fault assessment method of Integrated Electricity and Natural Gas Network Considering Interdependent Characteristics 考虑相互依赖特性的电、气一体化网络故障评估方法
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697658
Su Jieying, Zhang Yongjun, An Yuzheng, Hu Liehao
{"title":"Fault assessment method of Integrated Electricity and Natural Gas Network Considering Interdependent Characteristics","authors":"Su Jieying, Zhang Yongjun, An Yuzheng, Hu Liehao","doi":"10.1109/POWERCON53785.2021.9697658","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697658","url":null,"abstract":"As the coupling between the power grid and the natural gas network continues to deepen, the interdependence between the power grid and the natural gas network has caused new system safety operation problems, increasing the risk of cascading failures in integrated electricity and natural gas system. For this reason, this paper proposes a method to analyze the influence of fault propagation in integrated electricity and natural gas system considering the interdependence of the power grid and the natural gas network. First, it analyzes the interdependence characteristics of integrated electricity and natural gas system and the propagation mechanism of faults between the two networks; and then analyzes the propagation characteristics of faults between the two networks under different coupling degrees. Furthermore, the quasi- steady-state power flow equations of integrated electricity and natural gas system considering the slow time-scale characteristics of transmission of natural gas is constructed. And then, from the perspective of energy supply efficiency and reliability of system, this paper uses loss rate of load and loss rate of global network effectiveness indicators to evaluate and analyze the impact of failure propagation on operation of integrated electricity and natural gas system, which constructs the assessment model of cascading failures of integrated electricity and natural gas system. Finally, the validity and applicability of the proposed model method are verified by simulation examples.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130062415","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}
引用次数: 1
Reactive Power Load Forecasting based on K-means Clustering and Random Forest Algorithm 基于k均值聚类和随机森林算法的无功负荷预测
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697840
Xueting Cheng, Tan Wang, Ye Li, Jun-Il Pi, Meng-zan Li, Bowen Liu
{"title":"Reactive Power Load Forecasting based on K-means Clustering and Random Forest Algorithm","authors":"Xueting Cheng, Tan Wang, Ye Li, Jun-Il Pi, Meng-zan Li, Bowen Liu","doi":"10.1109/POWERCON53785.2021.9697840","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697840","url":null,"abstract":"Reactive power forecasting is essential for power system dispatch control. And compared with the active power load, the reactive power load has the characteristics of being more random and non-linear. The traditional active power prediction method lacks the consideration of the reactive power load characteristics, and the prediction effect is not good. To this end, this paper proposes a reactive load forecasting model based on the combination of K-means clustering and random forest. First, the K-means clustering method is used to divide the load into several clusters, and then according to the historical reactive power load data extracted Reactive power load characteristics, use random forest algorithm to train the model and make predictions on the test set. Finally, using the reactive power load data of a certain region of China to test the validity and accuracy of the proposed model prediction.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130117369","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}
引用次数: 3
Position Deviation Analysis and Correction Method of Tunnelling Magnetoresistance Sensor used in Transformer Core Earthing Current Monitoring 隧道磁电阻传感器在变压器铁心接地电流监测中的位置偏差分析及校正方法
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697539
Lanruo Wang, Fei Jiao, Shuhua Zhang, Dang Li
{"title":"Position Deviation Analysis and Correction Method of Tunnelling Magnetoresistance Sensor used in Transformer Core Earthing Current Monitoring","authors":"Lanruo Wang, Fei Jiao, Shuhua Zhang, Dang Li","doi":"10.1109/POWERCON53785.2021.9697539","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697539","url":null,"abstract":"Tunnelling magnetoresistance current sensing technology is an effective measuring method which can be used in weak current monitoring in power system. Aiming at transformer core earthing current monitoring, a non-contact current monitoring method based on a single monaxial tunneling magnetoresistance sensor is proposed, and the basic principle and structure of current sensor are introduced. The influence of position deviation between current sensor and earthing copper bar on magnetic field distribution is studied, and the influence of the designed magnetic gathering structure on the position deviation is analyzed. The simulation results show that the magnetic gathering structure designed can effectively reduce the measurement error caused by position deviations. This paper provides reference for subsequent design of transformer core earthing current monitoring system.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130258427","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}
引用次数: 0
Capacity-Credit Evaluation of Renewable Energy Power in Jiaxing City based on Monte-Carlo Simulation 基于蒙特卡罗模拟的嘉兴市可再生能源电力容量信用评估
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697805
Keping Zhu, Yingjing He, Yujing Li, Pengfei Hu
{"title":"Capacity-Credit Evaluation of Renewable Energy Power in Jiaxing City based on Monte-Carlo Simulation","authors":"Keping Zhu, Yingjing He, Yujing Li, Pengfei Hu","doi":"10.1109/POWERCON53785.2021.9697805","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697805","url":null,"abstract":"In the next few years, Zhejiang's photovoltaic and offshore wind power will usher in substantial growth. As the continuous expansion of photovoltaic and offshore wind power installations, and the current grid planning needs and renewable energy development trends, it is of great importance to establish a capacity credit model for renewable energy output, which provides a basis for the realization of power system balance. This paper adopts the renewable energy capacity credit calculation method based on sequential Monte-Carlo simulation, and the evaluation of capacity credit adopts the secant method. According to the specific data of Jiaxing City's load, conventional machine assembly capacity, photovoltaic resources, wind resources, etc. in 2020, detailed simulation modeling and calculations have been carried out for the capacity credit of two renewable energy power generation scenarios, photovoltaic and wind power. Then, according to the results, the capacity credit of the local renewable energy power generation in Jiaxing City is analyzed with the change of renewable energy capacity, and recommendations are provided for the future development trend of photovoltaic and wind power in Jiaxing City.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131144596","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}
引用次数: 1
Selection Methods of Main Circuit Parameters for Modular Multilevel Matrix Converters 模块化多电平矩阵变换器主电路参数的选择方法
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697737
X. Ni, P. Qiu, Jintian Lin, Yi Lu, Yuqi Jin, Hua Xu
{"title":"Selection Methods of Main Circuit Parameters for Modular Multilevel Matrix Converters","authors":"X. Ni, P. Qiu, Jintian Lin, Yi Lu, Yuqi Jin, Hua Xu","doi":"10.1109/POWERCON53785.2021.9697737","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697737","url":null,"abstract":"The modular multilevel matrix converter (M3C) with the strengths of varying frequency is increasingly used in AC transmission. The main circuit parameter selection methods of the M3C have a great influence on the economy and operating performance of M3C. This paper studies the parameter selection of main components in M3C, such as the converter transformer, the sub-module (SM) capacitor and the arm reactor. In conclusion, the no-load voltage rating on valve side of transformer is advised to be near 1/2 times of arm rated voltage, the equivalent discharging time is recommended to be 60ms, and the arm reactance needs to be selected to limit characteristic frequency circulating current of M3C.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133552722","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}
引用次数: 0
Design and Analysis of AC&DC Power Distribution System for Low-Voltage Management at the End of Power Grid 电网末端低压管理交直流配电系统的设计与分析
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697463
Jin Li, Lei Ertao, Ma Kai
{"title":"Design and Analysis of AC&DC Power Distribution System for Low-Voltage Management at the End of Power Grid","authors":"Jin Li, Lei Ertao, Ma Kai","doi":"10.1109/POWERCON53785.2021.9697463","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697463","url":null,"abstract":"With the improvement of people’s living standards, the problem of voltage qualification rate in remote rural areas has become increasingly prominent. Under heavy load, the line voltage drop is relatively large, which is likely to cause the user voltage at the end of the line to be low. To this end, from an economic point of view, this paper proposes to use the original line to construct a DC transmission path, design a converter group and a switch network, and form an AC-DC distribution modal conversion system for a low-voltage distribution network. By detecting the voltage and current changes on both sides, there is no need for remote communication lines to determine the logic timing of the switches on both sides. The simulation results verify the feasibility of the scheme.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133195086","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}
引用次数: 0
Research on the collection technology of the Interne t of Things evolution of the Automatic metering system 自动计量系统物联网采集技术演进研究
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697849
Ying Sun, Qiong Wu, Xiaoqiang Wu, Jinyang Du, Haitong Gu, Enzhen Hou
{"title":"Research on the collection technology of the Interne t of Things evolution of the Automatic metering system","authors":"Ying Sun, Qiong Wu, Xiaoqiang Wu, Jinyang Du, Haitong Gu, Enzhen Hou","doi":"10.1109/POWERCON53785.2021.9697849","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697849","url":null,"abstract":"In order to promote the evolution of the metering automation system to the Internet of Things system, and to enable the system to provide strong support for new businesses in the future, the paper first analyzed the challenges of real-time, reliability, and lack of concurrency faced by measurement automation in the current development. Then the massive concurrent processing technology of the IoT was used to develop a measurement automation evolution test system. This research defined a new type of object-oriented collection protocol, and designed an IT technology architecture with low latency and high concurrency to meet the needs of real-time concurrent collection of massive terminals. Finally, the system was tested and verified, and the results showed that the test indicators meet the requirements. This research promotes the evolution and architecture upgrade of the metering automation system, and provided strong support for the digital transformation of China Southern Power Grid.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123183662","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}
引用次数: 0
Measurement of LVRT and HVRT characteristics of SVG and parameter identification of electromechanical simulation model SVG的LVRT和HVRT特性测量及机电仿真模型参数辨识
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697788
Guoqiang Lu, Xiangyu Tao, Dahai Yu, Ming Nian, Chunmeng Chen, J. Gan
{"title":"Measurement of LVRT and HVRT characteristics of SVG and parameter identification of electromechanical simulation model","authors":"Guoqiang Lu, Xiangyu Tao, Dahai Yu, Ming Nian, Chunmeng Chen, J. Gan","doi":"10.1109/POWERCON53785.2021.9697788","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697788","url":null,"abstract":"In order to obtain the low voltage ride through (LVRT) and high voltage ride through (HVRT) control model parameters of static var generator (SVG) with wide adaptability and high accuracy. A parameter testing and identification method of SVG fault model based on full fault set is proposed. Firstly, the electromechanical simulation model structure of SVG is analyzed, and the parameters to be identified are defined. Then, according to the voltage disturbances of various types and amplitudes that may occur in the operation of SVG, the test fault set is designed, and a comprehensive test is carried out for the package electromagnetic calculation given by the manufacturer. Finally, the fault control model of the manufacturer is obtained according to the test results, and the least square method is identified according to the parameters of PSASP model. The correctness of the test and identification results is verified by time-domain simulation.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131328984","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}
引用次数: 0
Heterogeneous resources self-organizing demand response model based on federal thought and influence model 基于联邦思想的异构资源自组织需求响应模型及影响模型
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697759
Haoyuan Cheng, Q. Ai, Yun Chen, Jiayu Wang, Xingde Huang, Yufan Zhang
{"title":"Heterogeneous resources self-organizing demand response model based on federal thought and influence model","authors":"Haoyuan Cheng, Q. Ai, Yun Chen, Jiayu Wang, Xingde Huang, Yufan Zhang","doi":"10.1109/POWERCON53785.2021.9697759","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697759","url":null,"abstract":"The traditional distribution network has basically no adjustable and controllable resources inside, so most of the scheduling methods of the traditional distribution network are centralized. However, centralized scheduling cannot accurately recognize massive flexible resources (especially heterogeneous resources), and it is unrealistic to establish a central database for complete data storage of these massive flexible resources, which also increases the difficulty for power system operators to achieve demand response management for future regional energy networks. Therefore, the paper intends to use the federal thought (FT) to enable power system operators to obtain influence models (IM) of various heterogeneous resources in the microgrid under the premise of ensuring privacy. The operator will process the model and return it to the microgrid operator to realize the self-organization of wide-area resources, thereby realizing efficient and profitable demand response management. At the end of the paper, the results of this method are compared with the results of traditional demand response scheduling to verify the effectiveness of the method.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131908169","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}
引用次数: 1
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