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2017 IEEE/IAS 53rd Industrial and Commercial Power Systems Technical Conference (I&CPS)最新文献

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Medium-term operation strategy for a grid-connected microgrid via minimax regret optimization 基于极大极小遗憾优化的并网微电网中期运行策略
Zhaohao Ding, Lizi Zhang, Weijen Lee
With the implementation of distributed generations, microgrid has become an important entity in the modern power systems. A grid-connected microgrid can participate in multiple electricity markets with different time scale to procure energy and self-schedule its internal generation resources to serve its demand. In a medium-term operation horizon (weekly, monthly or longer time span), the decision portfolio faced by a grid-connected microgrid includes forward market procurement, internal generator commitment and dispatching, and spot market procurement. To optimize this decision portfolio while manage the risks caused by the uncertainties, a medium-term operation decision-making model is proposed based on the minimax regret optimization theory. The corresponding mathematical model is formulated and solution method is provided. Numerical case studies are also provided to illustrate and verify the proposed model.
随着分布式发电的实施,微电网已成为现代电力系统的重要组成部分。并网微电网可以参与多个不同时间尺度的电力市场进行能源采购,并对其内部发电资源进行自我调度以满足自身需求。在中期运行阶段(每周、每月或更长时间跨度),并网微电网面临的决策组合包括远期市场采购、内部发电机承诺和调度以及现货市场采购。为了优化决策组合,同时管理不确定性带来的风险,提出了一种基于极大极小后悔优化理论的中期运营决策模型。建立了相应的数学模型,并给出了求解方法。数值研究也提供了说明和验证所提出的模型。
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引用次数: 6
An analytical method for wind energy potential, reliability, and cost assessment for wind generation systems 风力发电系统的风能潜力、可靠性和成本评估的分析方法
A. Ahadi, Xiaodong Liang, Weixing Li
In this paper, a new analytical method and a corresponding two-step procedure are proposed for a wind power generation system design. This comprehensive new method can achieve the wind energy potential evaluation, reliability and costs assessment. In Step 1, the wind energy potential is investigated through the Weibull two-parameter model using the hourly wind speed data of a site. The graphic method is used to extract the Weibull shape and scale parameters. The wind power density can then be determined for the site. In Step 2, an analytical method based on the fault tree analysis (FTA) and minimal cut sets is developed in order to determine the system reliability. The components' failure rates of a doubly fed induction generator (DFIG) wind turbine are used to calculate reliability. A generic annual operation and maintenance (O&M) costs calculation formula is proposed in this paper based on field data presented by National Renewable Energy Laboratory (NREL). A case study is conducted for a wind power project in St. John's, Newfoundland and Labrador, Canada. The proposed method is critical for planners and financial investigators to make an adequate decision for a wind power project.
本文提出了风力发电系统设计的一种新的分析方法和相应的两步法。这种综合的新方法可以实现风能潜力评估、可靠性评估和成本评估。步骤1利用某站点逐时风速数据,通过Weibull双参数模型对风能势进行研究。采用图形化方法提取威布尔形状和尺度参数。然后就可以确定场地的风力密度。第二步,提出了一种基于故障树分析和最小割集的系统可靠性分析方法。采用双馈感应发电机(DFIG)风力发电机组部件故障率计算可靠性。根据国家可再生能源实验室(NREL)提供的现场数据,提出了一个通用的年运行维护成本计算公式。本文对加拿大纽芬兰和拉布拉多省圣约翰市的一个风力发电项目进行了案例研究。所提出的方法对于规划人员和财务调查人员为风电项目做出适当的决策至关重要。
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引用次数: 2
Digital modular protection for grid-connected PMG-based WECSs with battery storage systems 数字模块化保护与电池存储系统并网的基于pmg的wcs
S. Saleh, R. Meng, R. McSheffery
This paper develops and tests a modular digital protection for interconnected permanent magnet generator (PMG)-based wind energy conversion systems (WECSs) with battery storage. The developed protection is constructed from digital relays (modules), each of which provides protection for a specific location of the PMG-based WECS and battery storage. Moreover, each module is featured with phaselet-based fault detection. The outputs of the developed protection are trip signals to operate circuit breakers in the PMG-based WECS, battery storage, and point-of-common-coupling. The modular digital protection is implemented for experimental testing on a 5 kW PMG-based WECS that has a 2.3 kW battery storage. Test results show that the developed protection can offer fast, accurate, and reliable responses to faults occurring in different parts of the tested WECS and battery storage. In addition, test results show that the modular digital protection has minor sensitivity to the location of faults, charge/discharge cycles of the battery storage, and/or levels of power delivery to the host grid.
本文开发并测试了一种模块化数字保护,用于基于互连永磁发电机(PMG)的具有电池存储的风能转换系统(wecs)。开发的保护由数字继电器(模块)构成,每个模块都为基于pmg的WECS和电池存储的特定位置提供保护。此外,每个模块都具有基于相位元的故障检测功能。开发的保护输出是跳闸信号,用于操作基于pmg的WECS中的断路器,电池存储和共点耦合。模块化数字保护是在具有2.3千瓦电池存储容量的5kw PMG-based WECS上进行的实验测试。测试结果表明,所开发的保护能够对被测WECS和电池存储的不同部位发生的故障提供快速、准确、可靠的响应。此外,测试结果表明,模块化数字保护对故障位置,电池存储的充放电周期和/或向主电网输送的电力水平具有较小的敏感性。
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引用次数: 4
A new way to be a forensic electrical expert 成为法医电气专家的新方法
G. Parise, L. Parise, M. Lombardi, E. Hesla
The paper aims to propose a first possible solution to solve the known contrast between the certain logic required by the judicial outcome of proceedings and the uncertain logic of the engineering evaluation. In the accident-cases that require a risk assessment, this discussion suggests to adopting the subdivision of accident-related trials into two different levels, a technical “engineering” level, performed on the quantitative analysis of the accident causes, followed by a judicial level. A technical level might better support the formulation of the verdict by providing a more exhaustive analysis of the accident causation and parties' responsibilities, getting over the “ancillary” position of the technical consultants in the depositions. It might also provide criteria to improve the safety of persons for accident prevention in the workplaces and in the operation of electrical installations. In some countries, the institutions establish and define the specific area of expertise of the forensic engineer and promote the advancement of the forensic science through conferences and publications. These institutions could support the suggested approach, considered that the safety is a basic human right and its increase is an ethical and civil duty.
本文旨在为解决诉讼结果所要求的确定性逻辑与工程评估所要求的不确定性逻辑之间的已知反差,提出一种第一种可能的解决方案。在需要进行风险评估的事故案件中,本讨论建议将与事故有关的审判细分为两个不同的级别,一个是技术“工程”级别,对事故原因进行定量分析,然后是司法级别。技术一级可以通过对事故的起因和各方的责任提供更详尽的分析,从而更好地支持判决的拟订,从而克服技术顾问在证词中的“辅助”地位。它还可以提供标准,以改善工作场所和电气装置操作中预防事故的人员安全。在一些国家,这些机构建立和界定了法医工程师的具体专业领域,并通过会议和出版物促进了法医科学的进步。这些机构可以支持所建议的办法,因为安全是一项基本人权,提高安全是一项道德和公民义务。
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引用次数: 2
Living with arc flash mitigation 生活与电弧闪光缓解
Antony C. Parsons, J. Gray
Developing an optimal arc flash protection strategy for a given facility can be difficult due to the number of solutions and system variables involved. Effective arc flash hazard reduction is best achieved by establishing an overall system protection strategy that accounts for safety and operational requirements as well as system reliability and availability. An overview of available solution categories and application guidance based on experience in a wide variety of facility types is presented in order to assist engineers trying to implement “safety by design” principles to help deal with arc flash hazards. The approach provided addresses the complexities of the trade-offs between competing priorities and provides tools that help users develop effective protection strategies for the unique circumstances in a given facility.
由于解决方案的数量和涉及的系统变量,为给定的设施制定最佳的电弧闪光保护策略可能很困难。有效减少电弧闪光危害的最佳方法是建立一个全面的系统保护策略,该策略考虑到安全和操作要求以及系统可靠性和可用性。根据在各种设施类型中的经验,概述了可用的解决方案类别和应用指南,以帮助工程师尝试实施“设计安全”原则,以帮助处理电弧闪光危害。所提供的方法解决了相互竞争的优先事项之间权衡的复杂性,并提供了帮助用户针对特定设施的独特情况制定有效保护策略的工具。
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引用次数: 4
The bus-split method for residential load aggregation 住宅负荷聚合的母线分路法
P. Pijnenburg, S. Saleh
This paper presents the implementation and performance testing of the bus-split method for aggregating power demands of energy storage appliances (i.e. heating units and water heaters) in residential loads. The tested method is based on modifying the bus-split formulation to replace load models with the power demands of constant-impedance and constant-power (PZ and PS) load components. The values of PZ and PS are determined by the ZIP phaselet method, which can provide PZ and PS for each reading of the household power meter. The combination of the ZIP-phaselet method and bus-split aggregation can eliminate the need for measuring the power demands of individual energy storage appliances, thus simplifying the implementation of the the bus-split aggregating of residential loads. The bus-split method has been implemented for performance evaluation using data collected from 20 households during the Fall, Winter, Spring, and Summer seasons. Performance results show that the developed aggregation method can provide accurate, simple, and non-intrusive aggregation of the power demands for energy storage appliances. Moreover, test results show that the bus-split method has minor sensitivity to the type and/or ratings of aggregated appliances, along with negligible sensitivity to seasonal variations of household power demands.
本文介绍了住宅负荷中储能设备(即供热机组和热水器)电力需求聚合的总线分路方法的实现和性能测试。该测试方法基于修改总线分割公式,将负载模型替换为恒阻抗和恒功率(PZ和PS)负载分量的功率需求。PZ和PS值采用ZIP相位法确定,可为户用电能表的每次读数提供PZ和PS值。将ZIP-phaselet方法与分路聚合相结合,可以消除对单个储能设备电力需求的测量,从而简化住宅负荷分路聚合的实现。利用秋季、冬季、春季和夏季从20个家庭收集的数据,采用总线分割方法进行绩效评估。性能结果表明,所提出的聚合方法能够准确、简单、无干扰地对储能设备的功率需求进行聚合。此外,测试结果表明,总线分割方法对聚合电器的类型和/或额级的敏感性很小,对家庭电力需求的季节性变化的敏感性可以忽略不计。
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引用次数: 2
Retrofit solution - mitigate 480V power system harmonics generated by automated guided vehicle charging system at container terminal 改造方案-减轻货柜码头自动导引车充电系统产生的480伏电力系统谐波
D. Paul, Jeremy Duck, P. Chavdarian
This paper describes a retrofit harmonic mitigation solution for the 480V power supply system designed for the battery charging system for the 72 automated guided vehicles (AGVs) at a large container terminal. The individual battery charging system for each AGV consists of 18 six-pulse thyristor modules, with each module rated at 7kW, 40V dc, and an AGV charging capacity of 126kVA at 720V dc. The supplier of the battery and battery charging equipment made no effort to mitigate harmonics and power quality issues in the design of the 480V power system. Design engineers for the container terminal performed a harmonic analysis when the power system design was configured based on the cabling and wiring information provided by the supplier. The analysis showed high harmonics, much higher than the limits prescribed in IEEE Std. 519. To achieve proper operation of the AGVs without affecting other automation equipment at the terminal, active filters were retrofitted. This paper discusses the test results for and limitations of mitigating harmonics for the first phase of retrofitting six active harmonic filters. This paper also provides recommendations for designing the port AGV power system.
针对某大型集装箱码头72辆自动导引车(agv)蓄电池充电系统的480V供电系统,提出了一种谐波缓解方案。每台AGV的单体电池充电系统由18个六脉冲晶闸管模块组成,每个模块额定功率为7kW,直流40V, AGV充电容量为126kVA,直流720V。在480V电源系统的设计中,电池和电池充电设备的供应商没有努力减轻谐波和电能质量问题。集装箱码头设计工程师在进行电力系统设计配置时,根据供应商提供的布线信息进行谐波分析。分析结果显示其谐波高,远高于IEEE标准519规定的限值。为了在不影响终端其他自动化设备的情况下实现agv的正常运行,对有源滤波器进行了改造。本文讨论了六个有源谐波滤波器改造的第一期谐波缓解的测试结果和局限性。本文还对港口AGV动力系统的设计提出了建议。
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引用次数: 2
Use of capability curves for the analysis of reactive power compensation in solar farms 利用能力曲线分析太阳能发电场无功补偿
E. Enrique
Generation capability curves have been used for the design and operation of conventional, nonrenewable - type power stations. The maximum generating capacity of a station is given by the aggregate of the capability curve for each generator. In the case of a solar farm, however, the generating capacity cannot be obtained by the aggregation of the capability curve for each inverter due to the presence of impedances in the collector system, in the substation and in the export transmission line. It is convenient to determine the generating capacity of a solar farm by incorporating these impedances into a capability curve to indicate the maximum active and reactive power at the point of interconnection with the transmission system. This paper describes the steps required to determine the capability curve of a solar farm and enumerates the factors affecting the shape of this curve.
发电能力曲线已被用于常规非可再生电站的设计和运行。电站的最大发电量由各发电机组的能力曲线的总和给出。然而,在太阳能发电场的情况下,由于集热器系统、变电站和出口传输线中存在阻抗,因此不能通过每个逆变器的能力曲线的汇总来获得发电量。通过将这些阻抗合并到能力曲线中,以表示与输电系统互连点的最大有功功率和无功功率,可以方便地确定太阳能发电场的发电能力。本文描述了确定太阳能发电场能力曲线所需的步骤,并列举了影响该曲线形状的因素。
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引用次数: 6
Development of a modified generic model of a DFIG-based wind turbine considering mechanical transient 考虑机械暂态的dfig型风力机改进通用模型的建立
Yi-Liang Hu, Yuan-Kang Wu
Over the last decade, wind power penetration has increased substantially because of environmental considerations. With the integration of so much wind power generating capacity, system operators are facing the challenge of maintaining the stability of the power system. Use of the complex wind turbine (WT) model to analyze the steady-state operation and dynamic stability of the power system with high wind power penetration requires a long computation time. Accordingly, generic models of various WTs have been developed. This work develops both generic and complex models of the WT that is based on the doubly fed induction generator (DFIG), which is the so-called type-3 WT. Both generic and complex models include inertia of the WT and pitch control with the anti-windup mechanism to ensure that they can represent the electrical and mechanical parts of a real WT. This work compares the characteristics of the developed complex and generic models. The simulation results demonstrate that the developed generic model of the type-3 WT reasonably approximates the complex model.
在过去的十年中,由于对环境的考虑,风力发电的渗透率大幅增加。随着如此多的风力发电容量的整合,系统运营商面临着保持电力系统稳定性的挑战。利用复杂风力机(WT)模型分析高风量下电力系统的稳态运行和动态稳定性需要较长的计算时间。因此,开发了各种wt的通用模型。这项工作开发了基于双馈感应发电机(DFIG)的小波变换的通用模型和复杂模型,即所谓的3型小波变换。通用模型和复杂模型都包括小波变换的惯性和螺距控制与反卷绕机构,以确保它们能够代表真实小波变换的电气和机械部分。这项工作比较了开发的复杂模型和通用模型的特点。仿真结果表明,所建立的3型小波变换通用模型能较好地逼近复杂模型。
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引用次数: 6
Low-voltage shore connection power systems 低压岸接电力系统
D. Paul, V. Haddadian, B. Chavdarian, K. Peterson
This paper reviews low-voltage shore connection power systems for ships with up to 1,500kVA and voltage of 400V to 690V. The design for these systems is contained in the current low-voltage shore connection (LVSC) draft standard IEC/IEEE80005-3. This paper attempts to clarify that a LVSC design that uses multiple parallel feeder circuit breakers is not violating National Electric Code (NEC) National Fire Protection Association (NFPA) 70 Section 240.8. This paper also attempts to clarify the optional design for an ungrounded shore-power system, where required, which is included in the draft standard. In addition, this paper reviews the safety loop circuit to enhance the safety of the operators both onshore and onboard a ship.
本文综述了电压为400V至690V,电压达1500kva的船舶低压岸接电源系统。这些系统的设计包含在当前的低压岸上连接(LVSC)标准草案IEC/IEEE80005-3中。本文试图阐明,使用多个并联馈线断路器的LVSC设计并不违反国家电气规范(NEC)国家消防协会(NFPA) 70节240.8。本文还试图澄清不接地岸电系统的可选设计,在需要时,这包括在标准草案中。此外,本文还回顾了安全回路,以提高陆上和船上操作人员的安全性。
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引用次数: 2
期刊
2017 IEEE/IAS 53rd Industrial and Commercial Power Systems Technical Conference (I&CPS)
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