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In-depth investigation of effects of partial shading on PV array characteristics 部分遮阳对光伏阵列特性影响的深入研究
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612539
Fang Zhang, Jian Li, Chongzhi Feng, Yanjuan Wu
{"title":"In-depth investigation of effects of partial shading on PV array characteristics","authors":"Fang Zhang, Jian Li, Chongzhi Feng, Yanjuan Wu","doi":"10.1109/PEAM.2012.6612539","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612539","url":null,"abstract":"The output characteristics of photovoltaic (PV) generation system depend on environmental factors such as solar insolation and cell temperature. PV systems sometimes subject to partial shading, the probability for large scale PV system is very large. Under partially shaded conditions, I-U characteristic of PV array exhibits multiple stairs, and P-U characteristic of PV array shows multiple peaks. Traditional maximum power point tracing (MPPT) algorithm only converges to local peak, not the global peak. This paper investigates in-depth the effects of partial shading on PV array characteristics, and several important observations or conclusions are summarized, which helps to provide experiences or references for developing an effective global MPPT scheme under partially shaded conditions.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"14 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114018827","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: 15
Interactive building load management for smart grid 面向智能电网的交互式建筑负荷管理
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612459
X. Xue, Wang Shengwei
{"title":"Interactive building load management for smart grid","authors":"X. Xue, Wang Shengwei","doi":"10.1109/PEAM.2012.6612459","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612459","url":null,"abstract":"Energy issue is a critical problem for sustainable development. Both electrical grid, as the power supply network, and buildings, as major power consumers at demand side, can play important roles with optimal grid management and control. This paper presents an interactive building load management framework between smart grid and commercial buildings, with optimal setting for both supply and demand sides. A simplified building thermal model and kinds of indoor temperature control strategies are employed for estimating load management capability and aggregation load profile of buildings. Building operation cost function and simplified dynamic pricing algorithm are also developed for bidirectional interactions. Load alteration and shifting can be achieved by implementing the interactive load management strategy offering improved overall load factor of the grid.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114158819","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: 16
Evaluating the effect of subsynchronous oscillation on turbine generator shaft 次同步振荡对汽轮发电机轴的影响评价
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612476
X. Yanhui, Zhang Lanyu
{"title":"Evaluating the effect of subsynchronous oscillation on turbine generator shaft","authors":"X. Yanhui, Zhang Lanyu","doi":"10.1109/PEAM.2012.6612476","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612476","url":null,"abstract":"As HVDC and series capacitor compensation transmission lines are widely used, subsynchronous oscillation (SSO) problem stands out. Evaluating the effect of subsynchronous oscillation on shaft system is the foundation for ensuring turbine-generator unit security. The mechanism of shaft damage was analyzed from material mechanics point of view in this paper, and the method for evaluating the effect of SSO on shaft system was put forward. Firstly, variational-amplitude SSO was transformed into a series of constant-amplitude SSO using rain flow algorithm. Then, the fatigue damnification of shaft system resulting from SSO was calculated according to Miner rule. The validity of the evaluation method about the effect of SSO on turbine generator shaft was shown through the subsynchronous resonance of IEEE first benchmark model.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127161735","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
Study on energy saving potential evaluation for distribution networks 配电网节能潜力评价研究
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612448
Yongjun Zhang, Xiaohui Zhan
{"title":"Study on energy saving potential evaluation for distribution networks","authors":"Yongjun Zhang, Xiaohui Zhan","doi":"10.1109/PEAM.2012.6612448","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612448","url":null,"abstract":"A new method for distribution network energy saving potential (ESP) evaluation and modification investment planning is proposed in this paper. The ESP evaluation is composed of microscopic analysis of samples and macro statistics of the whole network. First of all, evaluating the selected feeders' ESP of nine modification measures separately; then, comprehensive ESP of each feeder is assessed by matching integration; at last, after ESP classification and characteristics of the whole network analog processing of the selected feeders, ESP of the whole network is obtained through weighted proportion. The example shows that the proposed method is helpful for understanding the loss reduction space and modification demand of distribution systems.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126736987","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
The harmonic analysis of traction power system based on a new Vv traction transformer 基于新型Vv牵引变压器的牵引电力系统谐波分析
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612475
Lou Yun-ge, Luo Long-fu
{"title":"The harmonic analysis of traction power system based on a new Vv traction transformer","authors":"Lou Yun-ge, Luo Long-fu","doi":"10.1109/PEAM.2012.6612475","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612475","url":null,"abstract":"Traction power system of electrical railway has nonlinear loads, which produces a great quantity of harmonics which will affect power quality of grid unavoidably. For Traditional Vv transformer does not have filtering capacity, all the harmonics are delivered to the grid. In this paper, a new Vv transformer that has filtering capacity is raised. What is more, its equivalent circuit and harmonic model are proposed, and its filtering theory is analyzed. At the end, the simulation model of the traditional Vv and the new Vv wiring transformers in the traction power system are established and the harmonic character is analyzed. The simulation results show that, the new Vv transformer can suppress the harmonics at its traction side effectively, lower harmonic content of grid side, and lower harmful influence of harmonic to traction transformer.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126752329","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 practical digital VRB simulator for power system and smart grid applications 一个实用的数字VRB模拟器，用于电力系统和智能电网的应用
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612431
Junwen Xie, Jiming Lu, C. Mao, Dan Wang, Yang Yi, Changsong Yi, Yong Luo, Jie Zeng, Xun Chen
{"title":"A practical digital VRB simulator for power system and smart grid applications","authors":"Junwen Xie, Jiming Lu, C. Mao, Dan Wang, Yang Yi, Changsong Yi, Yong Luo, Jie Zeng, Xun Chen","doi":"10.1109/PEAM.2012.6612431","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612431","url":null,"abstract":"There is a growing interest in using battery energy storage system (BESS), especially Vanadium Redox Flow Battery (VRB), in power system and smart grid. Usually, the usage of real VRB brings many problems. This paper looks into modeling VRB and designing a digital VRB simulator which is capable of simulating V-I characteristics of VRB with high accuracy. It has many advantages, such as low cost, easy to use, convenience to adjust VRB parameters and so on. Simulation and experimental results showed good performance and satisfied effect.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115939654","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
Design of the wireless monitoring system of solar lamps based on ZigBee and GPRS 基于ZigBee和GPRS的太阳能灯无线监控系统的设计
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612462
Mingxia Su, Yixin Su, Pei Lv
{"title":"Design of the wireless monitoring system of solar lamps based on ZigBee and GPRS","authors":"Mingxia Su, Yixin Su, Pei Lv","doi":"10.1109/PEAM.2012.6612462","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612462","url":null,"abstract":"Aiming at the development of solar light monitoring system in China, and combining Zigbee and GPRS technology, a monitoring system for solar light has been designed and realized in this paper. The system is mainly composed of four parts: road lamp control unit, ZigBee module, GPRS module, and monitoring and managing software. The street light unit is applied to collect state information, ZigBee module to realize wireless assembling and gather state information to the central node, GPRS module to transmit remote state information to the monitoring and managing computer. The monitoring and managing software provides man-machine management interface finally. Due to its advantages of low cost, high efficiency and intellectualization, the system will be put into use this year as soon as possible.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"11 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129727787","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: 6
Analysis of inrush current and over-voltage with HVDC AC filters switching on 高压直流交流滤波器接通时的涌流和过电压分析
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612528
Xia Chengjun, Cong Baofeng
{"title":"Analysis of inrush current and over-voltage with HVDC AC filters switching on","authors":"Xia Chengjun, Cong Baofeng","doi":"10.1109/PEAM.2012.6612528","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612528","url":null,"abstract":"The number of the faults caused by AC filters has been reached 8 times in a HVDC system of CSG. The AC Filter may produce inrush current and over-voltage when switching on, which will occasionally damage the filters, make protection malfunction and threat the system. The paper introduces a simulation based on Monte Carlo algorithm and PSCAD User-definition model in order to analysis the problem. This paper makes simulations about inrush current and the zero sequence current to research three-phase unbalanced inrush current in the inverter side. Based on these results, some methods which solve the effect of inrush current has been proposed, like erecting POW, locking the unbalanced protection temporarily.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128790464","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
Monitoring the technical condition of dams of hydroelectric power plants with an automated monitoring and earthquake registration system 利用自动监测和地震登记系统监测水电站大坝技术状况
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612505
Alexander V. Kuzmenko, Darya Vorobyeva, E. Zolotukhin
{"title":"Monitoring the technical condition of dams of hydroelectric power plants with an automated monitoring and earthquake registration system","authors":"Alexander V. Kuzmenko, Darya Vorobyeva, E. Zolotukhin","doi":"10.1109/PEAM.2012.6612505","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612505","url":null,"abstract":"An approach is described that has been developed for auxiliary monitoring of technical condition of hydropower plant dams. It is based on analysis of changes in dynamic characteristics of dams obtained by an automated monitoring and earthquake registration system that records microseismic vibrations of structures. The configuration of the system as well as the results of seismometric monitoring of the dam of Krasnoyarsk hydroelectric power plant are described. To study behavior of the dam under normal and extreme loads it was proposed to develop a model of the dam with the use of the finite element method.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131042066","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
Modification in the design of small wind turbine to increase power output 在小型风力发电机的设计上进行修改，以增加功率输出
2012 Power Engineering and Automation Conference Pub Date : 2012-09-01 DOI: 10.1109/PEAM.2012.6612482
Ankur Mahajan, S. Chatterji, S. Shimi
{"title":"Modification in the design of small wind turbine to increase power output","authors":"Ankur Mahajan, S. Chatterji, S. Shimi","doi":"10.1109/PEAM.2012.6612482","DOIUrl":"https://doi.org/10.1109/PEAM.2012.6612482","url":null,"abstract":"The global electrical energy consumption is still rising and there is an urgent demand to increase the power capacity. It is expected that power capacity has to be doubled within 20 years. The generation, transmission/distribution and use of electrical energy should be as efficient as possible. It has been found that if we save 1KW of energy at the end-user, 6KW is saved at the generation end. This calls for provision of incentives to save energy at the end-user. Deregulation of energy in the past lowered the investment in larger power plants, which establishes the need for new power sources in near future. Two major technologies play an important role to solve the future problems. (1) Use of renewable sources of energy. (2) Use of efficient power electronics in power generation, power transmission/distribution and end-user applications. This paper deals with one of the most emerging renewable sources, wind energy, which plays an important role in energy sector. With the use of proposed venturi tube design for small wind turbines proposed in this paper, the output of the wind turbine can be substantially enhanced.","PeriodicalId":130967,"journal":{"name":"2012 Power Engineering and Automation Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123941321","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
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