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2015 International Conference on Clean Electrical Power (ICCEP)最新文献

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A predictive control scheme for an autonomous induction generator with saturation effect 具有饱和效应的自主感应发电机的预测控制方案
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177653
S. Meddoun, Le Anh Dao, L. Ferrarmi
The present paper addresses the problem of designing a control scheme for induction generator working as a variable speed stand-alone generating system. The excitation of the generator is achieved by means of PWM inverter/rectifier connected to a single capacitor on the DC side. The objective is to keep the DC voltage at the rectifier output constant and equal to the reference value regardless of changes in the rotor speed. To achieve this, an MPC control is proposed and investigated. The effectiveness of the developed MPC is evaluated though a comparison with a fuzzy PID controller previously developed. The obtained performance are then presented and discussed.
本文研究了异步发电机作为变速单机发电系统的控制方案设计问题。发电机的励磁是通过连接到直流侧单个电容的PWM逆变器/整流器实现的。目的是保持直流电压在整流器输出恒定,等于参考值,无论在转子转速的变化。为此,提出并研究了一种MPC控制方法。通过与先前开发的模糊PID控制器的比较,评价了所开发的MPC的有效性。然后介绍并讨论了所获得的性能。
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引用次数: 2
Virtual power plant with energy storage optimized in an electricity market approach 电力市场方法下具有优化储能的虚拟电厂
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177644
G. Lazaroiu, V. Dumbrava, S. Leva, M. Roscia, M. Teliceanu
This paper deals with the mathematical formulation and implementation of the optimization model for virtual power plants (VPPs). The daily optimized operation of the VPP is focusing on maximizing its benefit, considering VPP comprising renewable energy sources and energy storage systems, thermal engines and demand-response loads. The optimization model is tested considering two case studies of average electricity prices on the day-ahead market, each of them in four scenarios of the mix renewable energy sources. The model, analyzed on a 24 hours time horizon, is implemented and tested in GAMS. The obtained results show that the best benefit obtained by the virtual power plant owner is obtained when the energy production of analyzed available renewable energy sources is high, and the day-ahead market prices are elevated. In the present paper, the case when the power system operator constraints the exchanges with the virtual power was not considered.
本文研究了虚拟电厂优化模型的数学表达式和实现方法。考虑到VPP包括可再生能源和储能系统、热机和需求响应负载,VPP的日常优化运行的重点是最大化其效益。通过对日前市场平均电价的两个案例研究,分别在可再生能源混合的四种情况下对优化模型进行了测试。该模型在24小时时间范围内进行了分析,并在GAMS中进行了实现和测试。研究结果表明,当所分析的可再生能源发电量较高,且日前市场电价较高时,虚拟电厂业主的效益最佳。本文不考虑电力系统运营商约束与虚电交换的情况。
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引用次数: 21
Accurate design of controllers in a parallel single-phase inverter system of distributed generators sharing linear and non-linear loads 分布式发电机并联单相逆变系统控制器的精确设计
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177592
Giovanni Mazzanti, M. Karimian, E. Chiodo, Davide Lauria, A. Rabiee
Renewable energy sources provide power in a form not directly deliverable to the grid, thereby requiring power electronic converters. Parallel inverters are generally used to achieve high reliability and reduce inverter rating. In this paper the inherent limitations of conventional droop control method for low voltage parallel inverters with mainly resistive tie line are shown, and multi-loop control strategy is proposed. Such strategy uses proportional plus multi-resonant controllers to achieve high quality of the voltage through harmonic distortion rejection. The design procedure of this controller is investigated thoroughly and it is shown that both controller resonant gain and bandwidth affect the stability of the system. Also a new configuration for virtual resistive impedance loop is proposed to improve the accuracy of both linear and non-linear load sharing without degrading voltage quality. Simulation results with two 4-kVA inverters are provided, showing proper stability margin, having sinusoidal voltage in the presence of nonlinear load, power sharing with a good accuracy and proper dynamic. Furthermore, some highlights on system reliability, and its possible improvements by proper redundancy, are briefly illustrated at the end of the paper.
可再生能源以一种不能直接输送到电网的形式提供电力,因此需要电力电子转换器。一般采用并联逆变器来实现高可靠性和降低逆变器额定功率。本文指出了传统的以电阻式联络线为主的低压并联逆变器下垂控制方法的固有局限性,并提出了多回路控制策略。该策略采用比例加多谐振控制器,通过抑制谐波畸变来实现高质量的电压。对该控制器的设计过程进行了深入的研究,结果表明,控制器的谐振增益和带宽对系统的稳定性都有影响。提出了一种新的虚拟电阻阻抗环结构,在不降低电压质量的前提下,提高了线性和非线性负载分担的精度。文中给出了2台4kva逆变器的仿真结果,结果表明该逆变器具有良好的稳定裕度,在存在非线性负载时具有正弦电压,功率共享精度好,动态性能好。此外,本文还简要说明了系统可靠性的一些重点问题,以及通过适当的冗余来提高系统可靠性的可能性。
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引用次数: 0
CZTS monograin membranes for photoelectrochemical fuel production preparation and characterization 用于光电化学燃料生产的CZTS单粒膜的制备与表征
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177625
A. Samieipour, E. Kouhiisfahani, Semjon Galajev, D. Meissner
Although photovoltaic is one the most promising solution for the future power supply in the world, the issue of storing it is still an open problem. Photoelectrochemical (PEC) cells, which convert solar energy into storable chemical energy directly, is one of the solutions of the storage problem in photovoltaics. In this paper the preparation of freestanding monograin membranes for use in PECs and their characterization is described. The manufacturing process in terms of reproducibility semiconductor particle densities and accessibility for contact formation is optimized. Here especially the etching process reducing the thickness of the polymer film and thereby exposing more of the monograin particles required attention since the etching temperature plays an important role determining the thickness of the. Whereas monograin layer solar cells as yet require particles of at least 45 μm diameter, the monograin membrane process developed here allows to produce such membranes from particles as yet down to 38-45 μm diameter, open and accessible from both sides.
虽然光伏发电是世界上最有前途的未来电力供应解决方案之一,但它的存储问题仍然是一个悬而未决的问题。光电化学电池将太阳能直接转化为可储存的化学能,是解决光伏发电储存问题的方法之一。本文介绍了用于聚氯乙烯的独立式单粒膜的制备及其性能。在半导体粒子密度的再现性和接触形成的可及性方面,优化了制造工艺。这里尤其需要注意的是,蚀刻工艺降低了聚合物薄膜的厚度,从而暴露出更多的单粒颗粒,因为蚀刻温度对聚合物薄膜的厚度起着重要的决定作用。单粒层太阳能电池需要直径至少为45 μm的颗粒,而这里开发的单粒膜工艺允许从直径38-45 μm的颗粒生产这种膜,并且可以从两侧打开。
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引用次数: 3
A global linearization approach to control and state estimation of a VSC-HVDC system VSC-HVDC系统的全局线性化控制与状态估计方法
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177556
G. Rigatos, P. Siano, P. Wira, Carlo Cecati
The paper proposes a new control method for the VSC-HVDC system, that is for an AC to DC voltage source converter connected to the electricity grid through a high voltage DC transmission line terminating at an inverter. By proving that the VSC-HVDC system is a differentially flat one, its transformation to the linear canonical form becomes possible. This is a global input-output linearization procedure that results into an equivalent dynamic model of the VSC-HVDC system for which the design of a state feedback controller becomes possible. Furthermore, to estimate and compensate for modeling uncertainty terms and perturbation inputs exerted on the VSC-HVDC model it is proposed to include in the control loop a disturbance observer that is based on the Derivative-free nonlinear Kalman Filter. This filtering method makes use of the linearized equivalent model of the VSC-HVDC system and of an inverse transformation which is based on differential flatness theory and which finally provides estimates of the state variables of the initial nonlinear model. The performance of the proposed VSC-HVDC control scheme is tested through simulation experiments.
本文提出了一种新的直流-直流系统的控制方法,即将交直流电压源变流器通过高压直流传输线与逆变器连接到电网。通过证明VSC-HVDC系统是差分平坦系统,使其转换为线性规范形式成为可能。这是一个全局的输入-输出线性化过程,其结果是VSC-HVDC系统的等效动态模型,因此状态反馈控制器的设计成为可能。此外,为了估计和补偿建模不确定性项和施加在vcs - hvdc模型上的扰动输入,提出在控制回路中包含一个基于无导数非线性卡尔曼滤波器的扰动观测器。该滤波方法利用直流直流系统的线性化等效模型和基于微分平坦度理论的逆变换,最终给出初始非线性模型的状态变量估计。通过仿真实验验证了所提出的VSC-HVDC控制方案的性能。
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引用次数: 0
Design optimization of the magnetic suspension for a flywheel energy storage application 飞轮储能用磁悬浮系统的优化设计
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177626
M. Andriollo, E. Scaldaferro, A. Tortella
Flywheel energy storage is one of the most suitable solutions for power-intensive applications due to its high reliability, relative immunity to environment aspects and long lifespan. On the other side, power supply of magnetic bearings, required for high-speed systems, may lead to the complete self-discharge at no-load in islanded operation within hours. The paper presents an optimized design of a hybrid suspension system for steel rotor flywheels combining permanent magnets and excitation coils, activated only in presence of displacements with respect to vertical steady-state position. Dynamic behavior is simulated by the adoption of a non-linear electromagnetic model including the influence of different parameters (for instance, temperature on magnet properties).
飞轮储能由于其高可靠性、相对不受环境影响和长寿命,是最适合电力密集型应用的解决方案之一。另一方面,高速系统所需的磁轴承电源可能导致孤岛运行时空载数小时内完全自放电。提出了一种钢转子飞轮混合悬架系统的优化设计,该系统由永磁体和励磁线圈组成,仅在相对于垂直稳态位置存在位移时激活。采用非线性电磁模型模拟了磁体的动态特性,考虑了不同参数(如温度对磁体性能的影响)的影响。
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引用次数: 1
A cascade control scheme for hybrid photovoltaic power system 混合光伏发电系统的串级控制方案
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177535
F. Cositore, S. Manfredi, M. Pagano, M. Roscia
The paper discusses on a control algorithm applied to a hybrid PV power system. The hybrid power system is constituted by directly connecting an Electric Double Layer Capacitor (EDLC) device on the dc output bus of the PV Maximum Power Point Tracker (MPPT) converter. The aim of this paper is to propose a control approach applied to the dc power converter able to assure a double set-point regulation, which takes into account the operational constraints of both the PV power source and storage buffer. Control design is based on a cascade strategy. The controller parameters are synthesize basing on the State Space Averaging (SSA) method and low perturbation approach. A numerical simulator is set up in ®Matlab. The results of simulations aim to validate the features of the proposed approach.
本文讨论了一种应用于混合光伏发电系统的控制算法。在光伏最大功率点跟踪器(MPPT)变换器的直流输出母线上直接连接电双层电容器(EDLC)器件构成混合电源系统。本文的目的是提出一种应用于直流电源变换器的控制方法,该方法能够确保双设定点调节,同时考虑到光伏电源和存储缓冲区的运行约束。控制设计基于级联策略。基于状态空间平均(SSA)法和低摄动法对控制器参数进行综合。在®Matlab中建立了一个数值模拟器。仿真结果验证了所提方法的特点。
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引用次数: 1
Hybrid micro-grid experimental application in Tanzania 混合微电网在坦桑尼亚的试验应用
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177542
M. Carmeli, M. Mauri, C. Brivio, P. Guidetti, S. Mandelli, M. Merlo, R. Perini, G. Marchegiani, D. Rosati
This paper is intended to introduce the project Energy4Growing that aims at studying and setting up a hybrid micro-grid to supply power to a school in rural Tanzania. It describes the results of the early project actions which concerned in: (i) analysing the actual school power supply system through locally metered data; (ii) developing the first step of a new electro-mechanical model which addresses the simulation of operation and dynamics within an off-grid power system; (iii) validating the new model. In particular the paper focuses on describing the development and the first step implementation of the new modelling approach which address: (i) voltage and frequency analyses over medium term period by means of simplified electromechanical models of power sources and power electronics, (ii) the analysis of different dispatch strategies and their consequence on voltage and frequency trends, (iii) the effects of dispatch strategies on the energy performances of particular components such as battery bank or dump loads. The new approach has also been applied in modelling the current school power supply system.
本文旨在介绍Energy4Growing项目,该项目旨在研究和建立一个混合微电网,为坦桑尼亚农村的一所学校供电。它描述了早期项目行动的结果,涉及:(i)通过本地计量数据分析实际的学校供电系统;(ii)发展新机电模型的第一步,以模拟离网电力系统的运作和动态;(iii)验证新模型。本文特别侧重于描述新建模方法的发展和第一步实施,该方法涉及:(1)通过电源和电力电子的简化机电模型进行中期电压和频率分析,(2)分析不同的调度策略及其对电压和频率趋势的影响,(3)调度策略对特定组件(如蓄电池组或转储负载)的能源性能的影响。新方法也被应用于目前学校供电系统的建模。
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引用次数: 5
High performance non isolated interleaved switched inductance converter for PV sources 用于光伏电源的高性能非隔离交错开关电感变换器
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177595
M. Balato, L. Costanzo, P. Marino, G. Rubino, L. Rubino, M. Vitelli
The best way to avoid MPPT drawbacks due to mismatching phenomena is to use a dedicated DC/DC converter, in charge of MPPT, for each PV panel instead of a big central converter for the whole PV array. Dedicated DC/DC converters can be boost-like converters; they must be serially connected each other to obtain an higher voltage as required by the grid inverter. However, when the number of PV panels is relatively low, the sum of the voltages of the boost converters in a string may be insufficient to allow the inverter energy conversion function. In this paper a non isolated interleaved switched inductance converter is proposed and studied. Such a converter is characterized by a high voltage ratio and by a quite simple construction. A mathematical study of static characteristics of the proposed converter in both CCM and DCM conditions is provided together with the analytical estimation of losses. Moreover, the proposed converter has been compared, in terms of losses, with the dual stage synchronous boost converter.
避免MPPT因不匹配现象而产生弊端的最好方法是使用专用的DC/DC转换器,负责每个光伏面板的MPPT,而不是整个光伏阵列的大型中央转换器。专用DC/DC变换器可以是升压式变换器;它们必须相互串联以获得电网逆变器所需的更高电压。但是,当光伏板的数量比较少时,一串升压变流器的电压之和可能不足以允许逆变器的能量转换功能。本文提出并研究了一种非隔离交错开关电感变换器。这种变换器的特点是高电压比和相当简单的结构。本文对该变换器在CCM和DCM两种情况下的静态特性进行了数学研究,并对损耗进行了分析估计。此外,还将该变换器与双级同步升压变换器在损耗方面进行了比较。
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引用次数: 0
Energy balance assessment on vehicles with electrically assisted internal combustion engines 电动内燃机车辆的能量平衡评定
Pub Date : 2015-06-16 DOI: 10.1109/ICCEP.2015.7177582
S. D. Caro, Carlo Scaffidi, T. Scimone, A. Testa
Electrically Assisted Internal Combustion Engines are gaining a large popularity, as they allow to obtain a noticeable average vehicle efficiency improvement at a low cost. Two different approaches are considered in designing last generation vehicles: Start-Stop, or Micro-Hybrid, and Electrically Assisted Turbocharger. The energy balance of a vehicle equipped with electrically assisted internal combustion engines is a quite critical point, as it has effects on the consistency of the hybridization, the design of the electric power generation system and of the battery. The energy balance of a C-segment vehicle adopting the two solutions is analyzed in this paper by suitable mathematical models. Moreover, the possibility to exploit the two approaches at the same time is discussed.
电动辅助内燃机越来越受欢迎,因为它们可以以较低的成本获得显著的平均车辆效率提高。在设计上一代汽车时考虑了两种不同的方法:启停或微混合动力和电动辅助涡轮增压器。电动内燃机汽车的能量平衡是一个非常关键的问题,因为它影响到混合动力的一致性、发电系统的设计和电池的设计。本文采用合适的数学模型,对采用这两种方案的c型车的能量平衡进行了分析。此外,还讨论了同时利用这两种方法的可能性。
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引用次数: 2
期刊
2015 International Conference on Clean Electrical Power (ICCEP)
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