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Theory research on the operation control technology in spark catcher grounded power system 接地系统火花捕集器运行控制技术的理论研究
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303278
H. Yue, Zeng Xiangjun, Zeng Min, Guo Hao
{"title":"Theory research on the operation control technology in spark catcher grounded power system","authors":"H. Yue, Zeng Xiangjun, Zeng Min, Guo Hao","doi":"10.1109/ISGT-ASIA.2012.6303278","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303278","url":null,"abstract":"The main fault in distribution networks is single-phase-to-ground fault (PTGF). when PTGF happens in spark catcher grounded system, the fault will be eliminated by making spark catcher grounded directly to avoid the generation of arc over-voltage. But if a transformer internal grounding fault (TIGF)occurs in networks(such as turn-to-ground fault), spark catcher action makes both ends of the fault windings grounded which results to transformer internal winding short and further leads to the transformer burning. So how to discriminate line faults from transformer internal faults becomes a crucial issue waiting to be solved urgently in small current neutral grounding system. In this paper the zero sequence current (ZSC) distribution and negative sequence current (NSC) distribution are analyzed respectively in above two situations. The PTGF and TIGF can be discriminated accurately. A new spark catcher controlling method based on ZSC distribution and NSC distribution is proposed in this paper.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127600517","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
Two partial price design of 50∼100kW commercial and industrial customers in Shanghai 两个部分价格设计为50 ~ 100kW的上海商业和工业客户
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303230
Zhang Mei-xia, Yang Xiu
{"title":"Two partial price design of 50∼100kW commercial and industrial customers in Shanghai","authors":"Zhang Mei-xia, Yang Xiu","doi":"10.1109/ISGT-ASIA.2012.6303230","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303230","url":null,"abstract":"The object studied in this article is 50-100kW low-voltage industrial and commercial customers in Shanghai. From statistical view, based on two partial price system feasibility analysis of small sample user with maximum demand, small sample user price features is extended to general user with nonlinear curve fitting, the maximum demand of general user is obtained. Then general user two partial price is calculated and analyzed, the conclusion is that the price variation features of general user and sample user are basically the same. The new two partial price system has feasibility and scientific.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"os-30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127772521","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
A high performance grid interfacing power conversion system for renewable power generation applications 一种用于可再生能源发电的高性能电网接口电源转换系统
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303378
Yaoqiang Wang, Li Sun, K. Zhao, Yun Zhang
{"title":"A high performance grid interfacing power conversion system for renewable power generation applications","authors":"Yaoqiang Wang, Li Sun, K. Zhao, Yun Zhang","doi":"10.1109/ISGT-ASIA.2012.6303378","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303378","url":null,"abstract":"Grid interfacing power conversion unit, connecting the renewable energy and utility grid, is a key section of the renewable power generation system, and quality of the generated power passed on to the utility grid greatly relies on the performance of the interfacing unit. In order to suppress the interfacing unit output current harmonics around integral multiple switching frequency more effectively, LCL filter is introduced to substitute the traditional L filter. However, LCL filter, a third-order system, may cause the control system unstable. For this, in the grid interfacing power conversion system, an additional capacitor current closed-loop is added to the conventional dual closed-loop scheme, where the capacitor current feedback signal is obtained through estimation. The system stability is ensured with no more additional sensors, at the same time both the filtering performance and system efficiency are increased compared with the traditional passive damping method. In addition, the design procedure of the output filter and the grid synchronization are specified. Effectiveness and feasibility of the grid interfacing power conversion system are verified by both the simulation and experimental results.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133486497","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: 2
Three to single phase buck-boost regulated high power quality Cycloconverter 三相到单相降压升压调节高功率质量环转换器
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303164
Md. Ali Azam, A. Azad, H. Imam, Md. Ashfanoor Kabir, M. Uddin, M. A. Choudhury
{"title":"Three to single phase buck-boost regulated high power quality Cycloconverter","authors":"Md. Ali Azam, A. Azad, H. Imam, Md. Ashfanoor Kabir, M. Uddin, M. A. Choudhury","doi":"10.1109/ISGT-ASIA.2012.6303164","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303164","url":null,"abstract":"In this paper, a new approach to design a good power quality three to single phase Cycloconverter regulated and controlled by Buck-Boost converters differentially connected across the load has been proposed. The proposed Cycloconverter improves Power Quality by reducing Total Harmonic Distortion (THD) of input line current, input Power Factor (Pf) and overall Efficiency (η) of the power conversion. Traditional twelve thyristor (SCR) cycloconverter has high THD (19% and above) and has only two quadrant operation on V~f plane. The proposed Cycloconverter has a lower THD (15% and below), requires only eight switches and it has the advantage of four quadrant control of voltage and frequency. Simulation has been performed in PSIM and Simulink for resistive and inductive loads with Back-emf. Open loop sliding Technique is applied to ensure good power quality at desired performance. Details of Operation and circuit performance is presented in this paper.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133772656","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
A Quantum-inspired Binary PSO algorithm for unit commitment with wind farms considering emission reduction 考虑减排的风电场机组承诺的量子启发二进制粒子群算法
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303247
Xiaoshan Wu, Bu-han Zhang, Kui Wang, Junfang Li, Y. Duan
{"title":"A Quantum-inspired Binary PSO algorithm for unit commitment with wind farms considering emission reduction","authors":"Xiaoshan Wu, Bu-han Zhang, Kui Wang, Junfang Li, Y. Duan","doi":"10.1109/ISGT-ASIA.2012.6303247","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303247","url":null,"abstract":"To reduce air pollutant emissions, generation scheduling with energy conservation and emission reduction is a kind of inevitable trend. The paper builds the mathematical model for solving unit commitment of power system with wind farms, which contains a bi-objective function considering both cost and emissions and up/down spinning reserve constraints of the system; simultaneously, the article uses a Quantum-inspired Binary PSO (QBPSO) for the regular unit on/off problem and the primal-dual interior point method for economic load dispatch problem. In addition, the paper deploys new heuristic adjusted regulations to ensure the whole algorithm to search the optimal particle in the feasible region. The proposed method is applied to power systems which are composed of up to 40-units with 24-h demand horizon and a certain proportion of wind farms. The simulation results show that considering both cost and emissions can not only guarantee the reliability and efficiency of power generation, but also be coincident with the environment requirements, making the unit commitment results more reasonable.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132216222","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: 12
Research and development of the comprehensive platform for analysis and warning of power grid 电网分析预警综合平台的研究与开发
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303200
Quan Qing, Hongtu Zhang, Yang Huang, Wei Hu, Lei Chen, Guichuan Yuan, Zhihua He
{"title":"Research and development of the comprehensive platform for analysis and warning of power grid","authors":"Quan Qing, Hongtu Zhang, Yang Huang, Wei Hu, Lei Chen, Guichuan Yuan, Zhihua He","doi":"10.1109/ISGT-ASIA.2012.6303200","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303200","url":null,"abstract":"This paper is aimed at the proposal of a structure for the comprehensive platform for analysis and warning of power grid. The emphasis is placed on the illustrating the function and structure, as well as the algorithm of the platform. The platform can integrate the dispatching systems widely used, including EMS, OMS, Scheduling Plan System, Lightning Location System, Waterpower Scheduling Automation System, WAMS and Weather Information Management System, etc. It can improve the dispatching automation technology and the dispatchers' ability, and make the operation risk of power system predictable, appreciable and controllable.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132281132","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: 2
Three-phase symmetrical short circuit current characteristic analysis of doubly fed induction generator with crowbar protection 带撬棍保护的双馈感应发电机三相对称短路电流特性分析
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303162
Zhai Jiajun, Zhang Bu-han, Wang Kui, Shao Wen
{"title":"Three-phase symmetrical short circuit current characteristic analysis of doubly fed induction generator with crowbar protection","authors":"Zhai Jiajun, Zhang Bu-han, Wang Kui, Shao Wen","doi":"10.1109/ISGT-ASIA.2012.6303162","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303162","url":null,"abstract":"When there has a sudden drop of grid voltage, crowbar protection circuit is a widely used method to improve the low voltage ride-through ability of wind turbines with doubly fed induction generator (DFIG), which is commonly used in wind power. This paper studied three-phase symmetrical short circuit current characteristics of DFIG with crowbar protection in depth, and simulations have been made in PSCAD/EMTDC. The analysis and simulation results show that, the output short circuit current concerns with crowbar resistance, dc-link voltage clamp effect and control strategies of the grid side converter (GSC). Short circuit current characteristics of a DFIG wind turbine become complicated because of the responses of GSC, when the dc-link clamp effect occurs. The GSC will also provide a high current to the short circuit point. However, when necessary restrictions have been introduced, short circuit current of DFIG wind turbine can be substituted by stator winding short circuit current of the DFIG whether the dc-link clamp effect occurs or not. Thus, on the basis of previous analysis results, we got short circuit current expressions of a DFIG under no dc-link clamp effect, when short circuit occurred at the normal operation. And an impedance voltage source model was proposed and has been verified at last.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134290031","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: 10
Design and development of a mobile LVRT testing device 移动LVRT测试装置的设计与开发
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303291
Xiaojing Lin, Beibei Wu, Junjun Zhang, Chen-guang Niu
{"title":"Design and development of a mobile LVRT testing device","authors":"Xiaojing Lin, Beibei Wu, Junjun Zhang, Chen-guang Niu","doi":"10.1109/ISGT-ASIA.2012.6303291","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303291","url":null,"abstract":"A new type LVRT test device, basing on power electronics technology, has been developed. Compared with traditional reactor VGS, this device overcomes many drawbacks, such as bulky size, difficult to control precision, and difficult to continuously testing. Considering the characteristics of distributed system accessing to the grid by photovoltaic power station, the designed testing platform has the capability of flexible and mobile performance. In this paper, working principle, hardware and software structures, and features have been introduced. Meanwhile, Testing verification and data analysis also have been conducted in laboratory. Based on those procedures, the device has been verified for having excellent effectiveness and practicality. Over that period, the device has been applied and tested on site in the Qinghai, which had got the ideal result as well as in laboratory.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"38 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133558891","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
Coordinated operation of gas engine and fuel cell cogeneration for reduction of CO2 emissions 协调运行燃气发动机和燃料电池热电联产，以减少二氧化碳排放
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303158
S. Murakami, Y. Miyaguchi, Y. Hida, R. Yokoyama
{"title":"Coordinated operation of gas engine and fuel cell cogeneration for reduction of CO2 emissions","authors":"S. Murakami, Y. Miyaguchi, Y. Hida, R. Yokoyama","doi":"10.1109/ISGT-ASIA.2012.6303158","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303158","url":null,"abstract":"In recent years, the number of consumers who install cogeneration systems which contribute to the reduction of CO2 emissions is increasing. To cope with this growing trend, it is necessary for the customers to pay attention to the strategies in employing multiple generators or sharing generators. In such circumstances, optimal operation methods for multiple generators and the estimation of the proper capacity of generators can become an important role. In our study, new methods to operate these generators and determine the optimal capacity of generators are investigated and the annual running cost and the amount of CO2 emissions are calculated. This research supposes the commercial facility as model for case study which equips a gas engine, a fuel cell, a gas chiller, and a gas boiler. In addition, comparison among a conventional system, cogeneration systems and a heat pump system was conducted. The result shows that the proposed operation method for cogeneration system has attained the most CO2 reduction.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134073393","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
Transformer aging failure rate evaluation method based on evidence theory for operational risk assessment 基于证据理论的运行风险评估变压器老化故障率评估方法
IEEE PES Innovative Smart Grid Technologies Pub Date : 2012-05-21 DOI: 10.1109/ISGT-ASIA.2012.6303114
Guoqiang Ji, Wenchuan Wu, Boming Zhang
{"title":"Transformer aging failure rate evaluation method based on evidence theory for operational risk assessment","authors":"Guoqiang Ji, Wenchuan Wu, Boming Zhang","doi":"10.1109/ISGT-ASIA.2012.6303114","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303114","url":null,"abstract":"Failure rate is a basic parameter in the outage model of the component in power systems. A novel aging failure rate evaluation method based on evidence theory is proposed. Transformer is taken as an example to illustrate the proposed method, because the transformers have been widely used online condition monitors. The operational states of a transformer can be classified into four degrees according to IEEE standards. An evaluation method is proposed to identify the operational state of a transformer by combining the data collected from condition monitors, which is based on evidence theory. Hidden Markov Models are used to model the aging process of a transformer, while the transition rate in the models can be obtained from the historical data. The time-varying aging failure rate function can be derived by solving the Markov state equation. A real example is presented to demonstrate the proposed method reasonable.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134114863","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: 4
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