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2018 IEEE International Conference on Industrial Electronics for Sustainable Energy Systems (IESES)最新文献

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Design of a temperature-insensitive digitally-controlled oscillator for on-chip reference clock 片上参考时钟温度不敏感数字控制振荡器的设计
Chih-Taoy Jung, Yingchieh Ho
This paper presents a 0.4V temperature-insensitive digitally-controlled ring oscillator (DCO) for on-chip reference clock circuit. Based on a modified bootstrapped ring oscillator (BTRO), temperature variation can be further decreased without calibration, where BTRO is operated at near-threshold voltage. A binary-weighted tree-controlled resistor network (BWTRN) is performed to achieve an 8bit high-linearity DCO with BTRO. The proposed DCO is fabricated in TSMC 90 nm CMOS process with a core area of 0.013 mm2. The simulation results in typical corner demonstrate that the DCO oscillates max/min frequency of 105.6MHz/60.7MHz at 0.4 V Vdd and consumes 8.77μW/4.44μW. The maximum temperature variation of the single code is 329 ppm, and its maximum DNL variation is 0.67 LSB. Even for all process corners, the maximum temperature variation among all control codes is 8%.
本文提出了一种用于片上参考时钟电路的0.4V温度不敏感数字控制环形振荡器(DCO)。基于改进的自举环振荡器(BTRO),无需校准即可进一步减小温度变化,其中BTRO在近阈值电压下工作。采用二值加权树控电阻网络(BWTRN)实现了带BTRO的8位高线性DCO。该DCO采用台积电90nm CMOS工艺制造,核心面积为0.013 mm2。典型角点仿真结果表明,在0.4 V Vdd下,DCO的最大/最小振荡频率为105.6MHz/60.7MHz,功耗为8.77μW/4.44μW。单码的最大温度变化为329 ppm,最大DNL变化为0.67 LSB。即使在所有的工艺角落,所有控制代码的最大温度变化是8%。
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引用次数: 4
Analysis of electric vehicle stability effectiveness on wheel force with BLDC motor drive 无刷直流电机驱动下电动汽车轮力稳定性效果分析
R. Behera, Rustam Kumar, Srirama Murthy Bellala, P. Raviteja
The focus of this paper is to develop effective control strategies to improve driving dynamics and slope of the road based on the mechanical dynamic study. The proposed control strategy stabilizes the wheels forces through control of brushless DC motor drive (BLDC). For stabilizing the 3 wheeler and structural advantages that BLDC motors are connected directly to the tires. The proposed system is studied analytically and a laboratory prototype is built to verify the effectiveness of the proposed control system. Few typical simulation and experimental results are presented.
本文的重点是在机械动力学研究的基础上制定有效的控制策略,以改善驾驶动力学和道路坡度。该控制策略通过控制无刷直流电机驱动(BLDC)来稳定车轮力。无刷直流电机直接连接在轮胎上,具有稳定三轮的结构优势。对所提出的控制系统进行了分析研究,并建立了实验室样机来验证所提出控制系统的有效性。给出了一些典型的仿真和实验结果。
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引用次数: 9
Battery storage system with active filtering function based on the conservative power theory for wind generators 基于保守功率理论的风力发电机有源滤波蓄电池储能系统
Tiago Davi Curi Buasarello, J. Pomilio
This paper presents a three-phase Battery Storage System (BSS) with active filtering function. The primary function of the BSS is to compensate power fluctuation from a Wind Generator (WG) system. The BSS activates the active filter function in specific moments during its operation. The BSS decision-algorithm and the control strategy are described. The Conservative Power Theory (CPT) is used to compute the active output power of the BSS and the WG System. The WG is connected to a 12.4 kV grid (phase-to-ground) while the BSS is connected to this grid through a 60Hz-transformer. The active filtering function is limited to mitigate the 5th and 7th harmonics from nonlinear loads to avoid large increasing on the RMS current of the BSS transformer. The BSS can perform its primary function simultaneously with active filtering. Simulation results show the efficacy of the BSS to operate in combination to a WG system.
提出了一种具有有源滤波功能的三相电池储能系统(BSS)。BSS的主要功能是补偿风力发电系统的功率波动。BSS在其运行过程中的特定时刻激活有源滤波函数。介绍了BSS决策算法和控制策略。保守功率理论(CPT)用于计算BSS和WG系统的有功输出功率。WG连接到12.4 kV电网(相对地),而BSS通过60hz变压器连接到该电网。有源滤波功能仅限于减轻非线性负载的5次和7次谐波,以避免BSS变压器的均方根电流大幅增加。BSS可以与有源滤波同时发挥其主要功能。仿真结果表明,BSS可以有效地与WG系统结合使用。
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引用次数: 5
Assessment of cost of unserved energy for Sri Lankan industrial sector 斯里兰卡工业部门未使用能源的成本评估
D. P. Colambage, H. Y. Ranjit Perera
The main function of a power system is to supply electricity to its customers at an adequate level of reliability and quality. Adequate level is the level of reliability and quality agreed upon by the stakeholders balancing the needs and costs of supply. Economic development of a country requires reduced frequency and duration of outages of supply and such improvements support the development in return. If such improvements are made, even a higher tariff is likely to be accepted by the customers. The Cost of Unserved Energy is one of the key economic evaluation parameters for deciding the required level of reliability of the power system. The need for an up to date study on this scope is strongly felt. This research presents the outcomes of a study for Assessment of Cost of Unserved Energy for Sri Lanka. The study is based on consumer survey method. The analysis has been done into three separate categories of electricity consumers as Industry, Commercial and Domestic. This research paper presents the results of Industry sector. Industry category is subdivided and results are presented separately for momentary, planned and unplanned electricity interruptions. It is expected that the results of this study helps the power sector to provide a better service, taking into consideration, the views of the customers and the national importance of electricity as an esential ingredient for economic growth.
电力系统的主要功能是以足够的可靠性和质量向用户供电。适当水平是由利益相关者在平衡供应的需求和成本时商定的可靠性和质量水平。一个国家的经济发展需要减少供应中断的频率和持续时间,而这种改善反过来又支持发展。如果做出这样的改进,即使更高的关税也可能被客户所接受。未用能成本是决定电力系统可靠性要求的关键经济评价参数之一。人们强烈地感到有必要对这一范围进行最新的研究。本研究提出了斯里兰卡未服务能源成本评估研究的结果。本研究采用消费者调查法。该分析将电力消费者分为工业、商业和家庭三大类。本文介绍了工业部门的研究结果。行业类别被细分,结果分别呈现瞬时,计划和非计划电力中断。预计本研究的结果将有助于电力部门提供更好的服务,同时考虑到客户的意见和国家对电力作为经济增长必不可少的组成部分的重要性。
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引用次数: 1
Current-type Power Hardware in the Loop (PHIL) evaluation for smart transformer application 智能变压器应用的电流型电力硬件在环(PHIL)评估
Giovanni de Carne, G. Buticchi, Marco Liserre
The development of power electronics and power systems due to the massive integration of renewable energy sources is challenging the distribution grids. Among several concepts, the Smart Transformer (ST), a solid-state transformer with advanced control and communication capabilities, has been investigated by several researchers. A great challenge of this kind of system is the possibility to test the effectiveness of the physical system under a broad spectrum of operating conditions. For this reason, the Power Hardware in the Loop (PHIL) concept can be adopted to emulate the behavior of a distribution grid connected to the ST. In this case, because the low-voltage stage of the ST is voltage controlled, the test setup must be current-controlled. In this paper, the current-controlled PHIL setup is analyzed. The theorethical analysis is carried out and preliminary results obtained with the PHIL facilities are presented, highlighting how the current-controlled PHIL can be an effective means to study the ST.
由于可再生能源的大规模集成,电力电子和电力系统的发展对配电网提出了挑战。在几个概念中,智能变压器(ST)是一种具有先进控制和通信能力的固态变压器,已经被一些研究人员研究过。这种系统的一个巨大挑战是在广泛的操作条件下测试物理系统的有效性的可能性。出于这个原因,环路中的电源硬件(PHIL)概念可以用来模拟连接到ST的配电网的行为。在这种情况下,由于ST的低压阶段是电压控制的,测试设置必须是电流控制的。本文分析了电流控制的PHIL设置。本文进行了理论分析,并介绍了用PHIL设备获得的初步结果,强调了电流控制PHIL如何成为研究ST的有效手段。
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引用次数: 6
DFIG wind turbine grid connected for frequency and amplitude control in a smart grid 在智能电网中,DFIG风力发电机组并网进行频率和幅度控制
J. Cortajarena, J. De Marcos, P. Alkorta, O. Barambones, J. Cortajarena
Power generated from wind is a fast growing renewable source of the world energy consumption. A double feed induction generator (DFIG) used in wind turbines, provides dynamic and static active and reactive power support. In this paper, the droop control technique is used to regulate the grid amplitude and frequency according to the criteria defined for the smart grid supervisor. Wind turbine will operate in an unloaded maximum power curve, and according to the reserved active power to correct the frequency deviation, the limit of the reactive power or voltage amplitude correction will be explained. In addition, the offset adjustment of the encoder and the stator synchronization and connection to the grid will be explained. The connection process to the grid and the regulation of a real 7.5kW DFIG is performed controlling the active and reactive powers to their reference values. For that, a platform based on a real-time interface with the DS1103 board is used.
风力发电是世界能源消费中快速增长的可再生能源。双馈感应发电机(DFIG)用于风力涡轮机,提供动态和静态有功和无功支持。本文采用下垂控制技术,根据智能电网管理器定义的准则对电网的幅值和频率进行调节。风电机组将运行在无载最大功率曲线上,并根据预留有功功率修正频率偏差、无功功率限值或电压幅值修正进行说明。此外,还将解释编码器与定子同步的偏移调整以及与电网的连接。并网过程和实际7.5kW DFIG的调节是执行控制有功和无功功率到其参考值。为此,采用了基于与DS1103板实时接口的平台。
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引用次数: 8
Efficiency analysis of a 7.7 kW inductive wireless power transfer system with parallel displacement 7.7 kW并联感应无线电力传输系统效率分析
D. Vincent, Soma Chakraborty, P. Huynh, S. Williamson
This paper provides an efficiency model of a 7.7 kW inductive wireless charging system based on the variations in transmitting and receiving coil alignment. The design and selection of electrical and geometrical parameters for the proposed model have been outlined. The 490 mm diameter magnetic couplers were simulated at an air gap of 165 mm. The system achieved 97% coupler-coupler efficiency under ideal conditions and zero misalignment. The performance of proposed couplers were investigated for 45 mm, 90 mm, 180 mm and 250 mm horizontal displacement in 3D finite element analysis. This model operates at a switching frequency of 85 kHz and employs a single capacitor series-parallel resonant compensation to minimize the VA rating of the supply and to maximize the power transfer capability. The prototype follows the SAE J2954 specification for a level 2 wireless power transfer system.
本文建立了基于发射线圈和接收线圈对线变化的7.7 kW感应无线充电系统效率模型。提出了模型的电气和几何参数的设计和选择。对直径为490 mm的磁力耦合器在165 mm气隙下进行了仿真。该系统在理想条件下实现了97%的耦合器效率和零偏差。在45 mm、90 mm、180 mm和250 mm的水平位移条件下,采用三维有限元分析方法研究了所设计耦合器的性能。该模型在85 kHz的开关频率下工作,采用单电容串并联谐振补偿,以最小化电源的VA额定值并最大化功率传输能力。原型机遵循SAE J2954 2级无线电力传输系统规范。
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引用次数: 3
Discovering the structure of cascade propagation in power grids 发现电网中串级传播的结构
R. Ghanbari, M. Jalili, Xinghuo Yu
Power systems are often prone to cascade failures, i.e. rapid propagation of failures that start from a set of nodes. Discovery of the pathway that cascade goes through in power systems will give the network planners a realistic insight to predict the extension route of cascade and deter it from expansion before it leads to a catastrophic blackout. In this manuscript we study the mechanism of cascade failures' propagation in power systems. A complex network model is applied to represent power systems where bus bars (generator, loads and transformers) can be considered as nodes and the transmission lines as links connecting these nodes. As benchmark networks we consider IEEE 57 and 118 bus test networks. A maximum flow based model is used to find the central edges. We study the way a cascade is propagated in a power system. We find that at initial steps, the cascade gets propagated locally, but as the cascade proceeds through the network, its pattern changes to a global expansion.
电力系统经常容易发生级联故障,即从一组节点开始的故障的快速传播。发现级联在电力系统中的传播路径,将为电网规划者预测级联的扩展路径提供一个现实的视角,并在它导致灾难性停电之前阻止它的扩展。本文研究了电力系统中串级故障的传播机理。采用复杂网络模型来表示电力系统,其中母线(发电机、负载和变压器)可以看作节点,传输线作为连接这些节点的链路。作为基准网络,我们考虑ieee57和ieee118总线测试网络。使用基于最大流量的模型来寻找中心边缘。我们研究了级联在电力系统中的传播方式。我们发现,在初始阶段,级联在局部传播,但随着级联在网络中继续传播,其模式改变为全局扩展。
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引用次数: 1
Cloud motion tracking system using low-cost sky imager for PV power ramp-rate control 基于低成本天空成像仪的云运动跟踪系统用于光伏发电斜坡率控制
Can Zhang, Yang Du, Xiaoyang Chen, D. Lu
Passing cloud results in rapid changes in solar irradiance. The intermittency of PV power output has drawn serious concern as the PV system installation increases significantly. Consequently, power ramp-rate control (PRRC) is introduced as the regulation to avoid significant power fluctuations. These requirements are driving an increasing demand for short-term PV power forecasting. Sky imager has been used as an effective tool to predict the cloud motion, then to forecast the PV power. However, the high cost of sky imager system and long image processing delay are still hindering its application in PRRC. In this paper, a low-cost cloud motion tracking system has been designed and developed. Ultra short-term cloud motion forecasting has been achieved in sub-minute level which can be used in PRRC application. The proposed method improves the forecasting accuracy by multiple cloud centroids tracking. The effectiveness of the proposed method has been verified by the practical experiment results.
经过的云导致太阳辐照度的快速变化。随着光伏系统安装量的大幅增加,光伏发电输出的间歇性问题引起了人们的严重关注。因此,引入了功率斜坡速率控制(PRRC)作为调节,以避免显著的功率波动。这些要求推动了对短期光伏发电预测需求的增长。天空成像仪已被用作预测云的运动,进而预测PV功率的有效工具。然而,天空成像仪系统的高成本和较长的图像处理延迟仍然阻碍了其在中国的应用。本文设计并开发了一种低成本的云运动跟踪系统。实现了亚分钟级的超短期云动预报,可用于prc应用。该方法通过对多个云质心的跟踪,提高了预测精度。实际实验结果验证了该方法的有效性。
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引用次数: 14
A new UPS topology for multi-megawatt medium voltage power protection 用于多兆瓦中压电源保护的新型UPS拓扑结构
R. Turner, N. Elliott
The footprint and electrical power needed to protect and run a large critical power facility has increased over the past decade. The established technologies are expensive and inefficient and facility owners are looking for a new approach. One solution is to push the power protection up the network to medium voltage (MV). Today this can be done with Diesel rotary Uninterruptible Power Supply (DRUPS), but a new unique approach is to apply a static UPS at MV in a highly efficient new UPS topology. This paper presents ABB's new “ZISC” architecture and the PCS120 MV UPS product.
保护和运行大型关键电力设施所需的占地面积和电力在过去十年中有所增加。现有的技术既昂贵又低效,设施所有者正在寻找一种新的方法。一种解决方案是将电源保护向上推至中压(MV)。今天,这可以通过柴油旋转不间断电源(DRUPS)来实现,但一种新的独特方法是在高效的新型UPS拓扑中应用毫伏静态UPS。本文介绍了ABB的新“ZISC”架构和PCS120 MV UPS产品。
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引用次数: 1
期刊
2018 IEEE International Conference on Industrial Electronics for Sustainable Energy Systems (IESES)
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