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2013 North American Power Symposium (NAPS)最新文献

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Energy storage and supergrid integration 储能和超级电网整合
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666892
M. West, Thomas Baldwin
Load following of thermal power plants becomes exceedingly difficult as dependence upon variable power generation increases. Energy storage systems (ESS) can manipulate this unpredictable generation and provide controllable power from an otherwise uncontrollable source. Modeling the interaction between these technologies and the utility grid is fundamental for understanding performance and optimizing functionality. MATLAB is used to simulate these ESS behaviors. Historic data of generation and demand taken from ISO New England and IESO Ontario is used. The model treats the ESS as a series of equations to manipulate data and demonstrate ideal ESS behaviors over given daily, monthly, and seasonal time periods. ESS placed on the generation side of the transmission system is used to stabilize variable power production and maximizing the use of transmission line capacities. ESS on the load side of the utility system is used to match demand. Results show that, using this technology, dependence upon variable generation can be increased while maintaining power balance. Effective selection of ESS size can result in greater dependence upon clean energy, reduce transmission system capacity, and decrease power production costs.
随着对可变发电依赖程度的提高,火电厂负荷跟踪变得异常困难。储能系统(ESS)可以控制这种不可预测的发电,并从其他不可控的来源提供可控的电力。对这些技术和公用事业网格之间的交互进行建模是理解性能和优化功能的基础。利用MATLAB对这些ESS行为进行了仿真。发电量和需求的历史数据取自ISO新英格兰和IESO安大略省。该模型将ESS作为一系列方程来处理数据,并在给定的日、月和季节时间段内展示理想的ESS行为。ESS放置在输电系统的发电侧,用于稳定可变电力生产和最大限度地利用输电线路容量。电力系统负荷侧的ESS用于匹配需求。结果表明,使用该技术可以在保持功率平衡的同时增加对变量发电的依赖。有效选择ESS的尺寸可以增加对清洁能源的依赖,减少输电系统容量,降低电力生产成本。
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引用次数: 1
A condition monitoring system for wind turbine generator temperature by applying multiple linear regression model 基于多元线性回归模型的风力发电机组温度状态监测系统
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666910
Khaled B. Abdusamad, D. Gao, E. Muljadi
The development and implementation of condition monitoring system become very important for wind industry with the increasing number of failures in wind turbine generators due to over temperature especially in offshore wind turbines where higher maintenance costs than onshore wind farms have to be paid due to their farthest locations. Monitoring the wind generators temperatures is significant and plays a remarkable role in an effective condition monitoring system. Moreover, they can be easily measured and recorded automatically by the Supervisory Control and Data Acquisition (SCADA) which gives more clarification about their behavior trend. An unexpected increase in component temperature may indicate overload, poor lubrication, or possibly ineffective passive or active cooling. Many techniques are used to reliably predict generator's temperatures to avoid occurrence of failures in wind turbine generators. Multiple Linear Regression Model (MLRM) is a model that can be used to construct the normal operating model for the wind turbine generator temperature and then at each time step the model is used to predict the generator temperature by measuring the correlation between the observed values and the predicted values of criterion variables. Then standard errors of the estimate can be found. The standard error of the estimate indicates how close the actual observations fall to the predicted values on the regression line. In this paper, a new condition-monitoring method based on applying Multiple Linear Regression Model for a wind turbine generator is proposed. The technique is used to construct the normal behavior model of an electrical generator temperatures based on the historical generator temperatures data. Case study built on a data collected from actual measurements demonstrates the adequacy of the proposed model.
随着风力发电机组因温度过高而导致的故障越来越多,特别是海上风力发电机组由于位置较远,其维护成本高于陆上风力发电机组,因此状态监测系统的开发和实施对风力工业来说变得非常重要。风力发电机组温度的监测是建立有效的状态监测系统的重要组成部分。此外,监控与数据采集系统(SCADA)可以方便地对其进行自动测量和记录,使其行为趋势更加清晰。部件温度的意外升高可能表明过载、润滑不良或可能无效的被动或主动冷却。为了避免风力发电机组故障的发生,需要采用多种技术对机组温度进行可靠预测。多元线性回归模型(Multiple Linear Regression Model, MLRM)是一种可用于构建风力发电机组温度的正常运行模型,然后在每个时间步长通过测量准则变量的观测值与预测值之间的相关性来预测风力发电机组温度的模型。然后可以找到估计的标准误差。估计的标准误差表示实际观测值与回归线上预测值的接近程度。本文提出了一种基于多元线性回归模型的风力发电机组状态监测新方法。该技术基于历史发电机温度数据,构建了发电机温度的正常行为模型。建立在实际测量数据基础上的案例研究证明了所建议模型的充分性。
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引用次数: 25
Transient stability assessment and synchronization of multimachine power system using Kuramoto model 基于Kuramoto模型的多机电力系统暂态稳定评估与同步
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666837
S. Sharma, S. Kulkarni, A. Maksud, S. Wagh, N. Singh
The crucial issue of loss of synchronization in post-disturbance conditions may lead to blackouts if corrective action is delayed. The complication increases due to large computation burden and time for wide-area network where thyristor-controlled series compensator (TCSC) is used as controller for transient stability enhancement. The trade-off in accuracy and speed in generating control law using linearized models becomes ineffective for changed operating scenarios. In addition, forming multi-machine linearized model becomes challenging when TCSC appears as non-separable element of a dense admittance matrix, which can be separated as a control variable in single-machine infinite-bus system. Overcoming the limitations of linearized controllers, the present paper verifies the Kuramoto mean-field condition using Kron reduction with non-trivial transfer conductances for unstable post-fault scenario. To regain synchronization effectively, necessary TCSC compensation has adjusted network parameters as proved by MATLAB simulations performed on 12-bus system, where real-time data is acquired by phasor measurement units.
如果纠正措施延迟,在干扰后条件下失去同步的关键问题可能导致停电。在广域网中,采用晶闸管控制串联补偿器(TCSC)作为增强暂态稳定的控制器,由于计算量大、耗时长,复杂性增加。使用线性化模型生成控制律时,在精度和速度上的权衡对于变化的操作场景是无效的。此外,当TCSC作为密集导纳矩阵的不可分离元素出现时,形成多机线性化模型变得具有挑战性,而在单机无限母线系统中,TCSC可以作为控制变量分离。本文克服了线性化控制器的局限性,利用具有非平凡传递电导的Kron约简验证了故障后不稳定场景下的Kuramoto平均场条件。为了有效地恢复同步,需要对网络参数进行必要的TCSC补偿,在12总线系统上进行了MATLAB仿真,其中相量测量单元实时获取数据。
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引用次数: 4
Hierarchical optimization and control of a distribution system 配送系统的分层优化与控制
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666847
T. Alquthami, A. Meliopoulos
A massive number of distributed energy resources (DER), battery energy storage systems (BESS), and smart appliances (loads) is expected to be deployed in the future. To capture the benefits associated with these emerging units, this paper proposes an advanced infrastructure that allows for an accurate and fast monitoring of the distribution electric feeder including various types of residential, commercial, and industrial loads. This scheme allows for optimizing the utilization and operation of the power system over a short term planning period. More precisely, the concept of distributed optimization algorithm through decomposing the problem into small parts is used to achieve the outlined goals. The enabling technologies that facilitate the implementation of the proposed infrastructure are the advanced metering devices and the distributed state estimation (DSE). The meters, basically, gather the system synchronized and non-synchronized data and send them to the DSE, which evaluates the real time model of the system 60 times per seconds. The results of the DSE are used to perform the optimization and set the controls for the system autonomously.
预计未来将部署大量分布式能源(DER)、电池储能系统(BESS)和智能家电(负载)。为了抓住与这些新兴单元相关的好处,本文提出了一种先进的基础设施,可以准确、快速地监测配电馈电器,包括各种类型的住宅、商业和工业负荷。该方案允许在短期规划期内优化电力系统的利用和运行。更准确地说,分布式优化算法的概念是通过将问题分解成小的部分来实现概述的目标。促进所建议的基础设施实现的支持技术是高级计量设备和分布式状态估计(DSE)。基本上,仪表收集系统同步和非同步数据并将其发送到DSE, DSE每秒评估系统的实时模型60次。DSE的结果被用于对系统进行自动优化和设置控制。
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引用次数: 4
Modeling of Z-source converter for renewable energy integration 可再生能源集成z源变换器建模
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666852
Yin Li, J. Khazaei, Lingling Fan, Zhixin Miao
In this paper, switching modulation schemes for Z-source converters used for renewable energy integration are investigated. Both dc-dc converters and dc-ac converters are discussed. Input/output voltage relationships for the two types of converters (half-bridge dc-dc and three-phase three-bridge dc-ac) are analyzed based on circuit analysis. The two converters are built and simulated in PSCAD. Simulation results give validation of the analysis results.
本文研究了用于可再生能源集成的z源变换器的开关调制方案。讨论了dc-dc变换器和dc-ac变换器。在电路分析的基础上,分析了两种变换器(半桥dc-dc和三相三桥dc-ac)的输入输出电压关系。在PSCAD中对这两个变换器进行了构建和仿真。仿真结果验证了分析结果。
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引用次数: 1
Study on visualization of distribution topology based on intelligent algorithms 基于智能算法的配电拓扑可视化研究
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666942
Jiang Li, Chao Wei, Yiwei Wang, Peng Zhang, Haotong Zhang, Guoqing Li
In order to solve the complicated problems about visualization of distribution topology structure, this paper proposes an automatic generation method consisted of several intelligent algorithms. Both layout and wiring are two main problems during the process of visualization. The gravitation-repulsion model is applied to optimize the substation nodes layout which can make the nodes of distribution more uniform in a given area. The gravitation between them will pull them to each other when the distance between two connected nodes is below a threshold. And each node suffers repulsions which push it away from the others if their positions are too close. An empirical approach is used to wire, which effectively reduces the crossing and avoids overlapping of the lines. Results of calculation show that the method proposed in this paper is effective and practical.
为了解决配电拓扑结构可视化的复杂问题,本文提出了一种由多种智能算法组成的配电拓扑结构自动生成方法。布局和布线是可视化过程中的两个主要问题。应用重力-斥力模型对变电站节点进行优化布置,使节点在给定区域内的分布更加均匀。当两个连接节点之间的距离低于某一阈值时,它们之间的引力会将它们相互拉向对方。如果位置太近,每个节点都会受到斥力的影响,使其远离其他节点。采用经验性方法进行布线,有效地减少了线的交叉,避免了线的重叠。计算结果表明,本文提出的方法是有效和实用的。
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引用次数: 3
Real-time synchronization control for standalone distribution networks in islanded power systems 孤岛电力系统中独立配电网的实时同步控制
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666826
Yucheng Zhang, Huaxi Zheng, H. Mohammadpour, R. Dougal
Traditional synchronizer cannot control multiple generators in distribution networks in coordination. In this paper, a real-time synchronization control (RTSC) is designed to keep all generators in different standalone distribution networks in synchronization at all times, which realizes a fast and reliable reconnection of disconnected power network. The frequency control and phase control in RTSC are investigated and low-pass filters are properly designed to avoid interference between these two controls. The simulation results in an isolated power system is verified the effectiveness of RTSC and have proved that the transient stability during reconfiguration process can be greatly enhanced by applying RTSC into system-level supervisory control of isolated power system.
传统的同步器无法对配电网中的多台发电机进行协调控制。本文设计了一种实时同步控制系统(RTSC),使不同独立配电网中的所有发电机始终保持同步状态,实现了断开电网的快速、可靠的重新连接。研究了RTSC的频率控制和相位控制,并设计了适当的低通滤波器以避免这两个控制之间的干扰。仿真结果验证了RTSC的有效性,并证明了将RTSC应用于隔离电力系统的系统级监控,可以大大提高系统重构过程中的暂态稳定性。
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引用次数: 3
A review and simulation on real time reactive power spot markets 实时无功电力现货市场综述与仿真
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666891
David Ganger, Ji Zhao, M. Hedayati, Akhil Mandadi
Reactive power spot markets have been proposed by many in the power engineering community as a means of reactive power compensation within the U.S. deregulated energy markets. Cited benefits include incentive for proper reactive power investment for power system stability, the minimization of costs to meet load, and proper reactive power price signals. However, the market power that can be exercised by utilities may render the market useless for consumer participants. In addition, the zero price of reactive power as well as the volatility in demand may not inspire the investment that spot markets are thought to encourage, and current methods of pricing reactive power involve time-consuming optimizations. An ACOPF simulation was run utilizing a representative urban transmission and distribution system, confirming many of the weaknesses theorized to exist in real time reactive power spot markets including exercise of market power and price volatility.
无功现货市场已被电力工程界的许多人提出,作为美国解除管制的能源市场中无功补偿的一种手段。所提到的好处包括激励适当的无功投资,以保持电力系统的稳定性,使满足负荷的成本最小化,以及适当的无功价格信号。然而,公用事业公司可以行使的市场力量可能会使市场对消费者参与者毫无用处。此外,无功电价为零以及需求的波动可能不会激发人们认为现货市场所鼓励的投资,而且目前的无功电价定价方法需要耗时的优化。利用具有代表性的城市输配电系统进行ACOPF仿真,证实了实时无功现货市场存在的许多理论上的弱点,包括市场权力的行使和价格波动。
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引用次数: 4
Towards the development of a two-time scale CUEP/BCU method 面向双时间尺度CUEP/BCU方法的开发
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666888
Edson A. R. Theodoro, L. Alberto, H. Chiang
This paper proposes a new Two-Time Scale (TTS) BCU method, and reports the first ever known use of the TTS-CUEP method in a multi-machine power system. The proposed TTS-BCU method is a numerical algorithm to correctly compute the slow and fast CUEPs of the TTS-CUEP method. It also provides a more robust algorithm to compute the CUEP of the original system.
本文提出了一种新的双时间尺度(TTS) BCU方法,并报道了TTS- cuep方法在多机电力系统中的首次应用。提出的TTS-BCU方法是一种正确计算TTS-CUEP方法的慢速和快速cuep的数值算法。它还提供了一种更鲁棒的算法来计算原始系统的CUEP。
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引用次数: 7
Reactive power markets: A possible future? 无功电力市场:一个可能的未来?
Pub Date : 2013-11-25 DOI: 10.1109/NAPS.2013.6666964
K. Banerjee, Parag Mitra, Aratrik Sarkar, Yuan Liu, Supriya Chathadi
Reliability issues in the wake of major blackouts have spurred a discussion on the development of reactive power markets. In the 2003 North American blackout, reactive power deficiency was identified as one of the causes for the propagation of the blackout. This event to an extent motivated the federal electricity regulatory committee (FERC) to explore the idea of reactive power markets. This paper investigates the need of reactive power in the system, the present compensatory structures and the new market structures suggested in literature. A survey of the present practices regarding compensation of reactive power and the associated drawbacks has been presented. In addition, the paper also analyses the possible challenges associated with implementation of competitive market structures as envisaged by FERC.
大停电后的可靠性问题引发了对无功电力市场发展的讨论。在2003年的北美大停电中,无功功率不足被确定为停电传播的原因之一。这一事件在一定程度上促使联邦电力监管委员会(FERC)探索无功电力市场的想法。本文研究了电力系统对无功功率的需求、现有的补偿结构以及文献中提出的新的市场结构。对目前无功补偿的实践和相关的弊端进行了调查。此外,本文还分析了与FERC设想的竞争性市场结构实施相关的可能挑战。
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引用次数: 2
期刊
2013 North American Power Symposium (NAPS)
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