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2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES)最新文献

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Steady state analysis of Quasi Switched Boost DC-DC converter in CCM CCM中准开关升压DC-DC变换器的稳态分析
Ajit Singh, Amit Kumar, A. Gupta, Ravindra K. Singh
This paper presents the steady state analysis Quasi Switched Boost (QSB) DC-DC converter. QSB impedance network has only one inductor and one capacitor unlike Z-Source/Quasi-Z-Source which have two inductors and two capacitances in their impedance network but QSB impedance network has one more active switch, one more diode than Z-Source/Quasi-Z-Source impedance network. The DC voltage gain for ideal and non-ideal QSB DC-DC converter has been derived. Further the minimum inductance has been design to mark the boundary between (CCM) and Discontinuous Conduction Mode (DCM). The overall power loss has been calculated by considering the all parasitic of non-ideal Quasi-Switched Boost Dc-Dc converter. Further the efficiency analysis has been done by considering its overall power losses.
本文介绍了准开关升压(QSB) DC-DC变换器的稳态分析。QSB阻抗网络只有一个电感和一个电容,不像Z-Source/准Z-Source在其阻抗网络中有两个电感和两个电容,但QSB阻抗网络比Z-Source/准Z-Source阻抗网络多一个有源开关,多一个二极管。推导了理想和非理想QSB DC-DC变换器的直流电压增益。此外,还设计了最小电感来标记(CCM)和断续传导模式(DCM)之间的边界。考虑了非理想准开关升压型Dc-Dc变换器的全寄生特性,计算了总功耗。进一步,通过考虑其总功率损失进行了效率分析。
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引用次数: 2
Heuristic optimization technique for hydrothermal scheduling considering pumped storage unit 考虑抽水蓄能机组的热液调度启发式优化技术
R. S. Patwal, Nitin Narang
In this paper presence of pumped-storage unit is considered for understanding its effect over the optimal scheduling of multi-reservoir cascaded hydrothermal Plants. In Present scenario pumped storage units are becoming a valuable part of power system plants for energy and water conservation and accomplishing the need of high power demands. To maximize the water as fuel input in hydroelectric system pumped storage units are added with an advantage of operating in generating as well as pumping mode. Hydrothermal scheduling is an important aspect and is performed to minimize the operating cost of thermal power generation but considering a pumped storage unit other practical problems are also resolved. The purpose of this research is to implement a heuristic optimization technique for optimal economic scheduling of hydrothermal units considering a pumped storage unit. In proposed heuristic optimization technique, global best solution obtained from Particle Swarm Optimization (PSO) technique is further improved by applying different mutation strategies. The modified global best solutions are compared and most improved global best solution is chosen as a final solution and used for further iterations. The feasibility and efficiency of heuristic optimization technique be validated through a test system containing four hydro plants, three thermal plants and single pumped storage unit. The results demonstrate that the heuristic optimization technique can get a better solution in comparison with PSO technique.
本文考虑了抽水蓄能机组的存在,以了解其对多水库级联热液电站优化调度的影响。目前,抽水蓄能机组已成为电力系统电厂节能、节水和满足高功率需求的重要组成部分。为了最大限度地提高水力发电系统中作为燃料输入的水,增加了抽水蓄能机组,其优点是在发电和抽水模式下运行。水热调度是一个重要方面,是为了使火电发电的运行成本最小化而进行的,但考虑到抽水蓄能机组,也解决了其他实际问题。本研究的目的是实现一种考虑抽水蓄能机组的热液机组经济最优调度的启发式优化技术。在启发式优化技术中,通过引入不同的突变策略,进一步改进粒子群优化(PSO)技术得到的全局最优解。对改进后的全局最优解进行比较,选择改进最大的全局最优解作为最终解,用于进一步的迭代。通过包含4座水电厂、3座火电厂和1座抽水蓄能机组的试验系统,验证了启发式优化技术的可行性和有效性。结果表明,启发式优化技术比粒子群优化技术能得到更好的解。
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引用次数: 2
Single phase transformerless photovoltaic inverter with reactive power control 无功控制的单相无变压器光伏逆变器
B. Brahmbhatt, H. Chandwani
The main objective of this paper is to understand the application of single phase grid tied photovoltaic inverter with reactive power control using three level voltage source inverter (VSI) configuration. For its implementation, a least complex grid synchronization approach was used for the generation of parallel and orthogonal components of the grid voltage in an efficient manner using various computing techniques to generate a synchronized current reference value in the current control loop. An improved H6 single-phase inverter topology ensures the elimination of the common-mode leakage current in the transformer-less photovoltaic grid-connected system. In addition this topology is also capable of withstanding the low input voltage similar to full-bridge inverter without causing any fault. The H6 inverter topology allows both unipolar Sinusoidal pulse width modulation (SINUSOIDAL PWM) as well as the bipolar (i.e. double frequency) SINUSOIDAL PWM control techniques for three-level output. Two additional switches are decoupled on the dc side for higher efficiency and convenient thermal design. Additionally, the unipolar-frequency SINUSOIDAL PWM facilitates higher frequency and low current ripples thereby reducing total harmonic distortion of the grid-connected current to a great extent.
本文的主要目的是了解采用三电平电压源逆变器(VSI)配置的单相并网无功控制光伏逆变器的应用。为了实现该方法,采用最简单的电网同步方法,利用各种计算技术,高效地生成电网电压的并联和正交分量,从而在电流控制环中生成同步电流参考值。改进的H6单相逆变器拓扑结构保证了无变压器光伏并网系统中共模漏电流的消除。此外,这种拓扑结构还能够承受类似全桥逆变器的低输入电压而不引起任何故障。H6逆变器拓扑结构允许单极正弦脉宽调制(Sinusoidal PWM)以及双极(即双频)正弦PWM控制技术用于三电平输出。两个额外的开关在直流侧解耦,以提高效率和方便的热设计。此外,单极频率正弦脉宽调制有利于更高的频率和低电流纹波,从而在很大程度上降低了并网电流的总谐波畸变。
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引用次数: 4
Combined cycle gas turbine and generator matching performance 联合循环燃气轮机与发电机的匹配性能
J. N. Rai, Ajendra Singh
Due to ever-increasing demand for power there arise a need for installation of higher efficiency generating stations. This problem of higher efficiency plants can be resolved by the combined cycle power plants which provide a high installation capacity and higher efficiencies; but the installation of newer generating stations affects the stability of grid. The behavior of combined cycle power plants is still a topic of research as none of the models developed yet have been successfully able describe its overall behavior. The following paper studies the behavior of combined cycle generator under various conditions using MATLAB/Simulink model.
由于对电力的需求不断增加,因此需要安装效率更高的发电站。高效电厂的这一问题可以通过联合循环电厂来解决,它提供了高安装容量和更高的效率;但新电站的安装会影响电网的稳定性。联合循环电厂的行为仍然是一个研究课题,因为目前开发的模型都不能成功地描述其整体行为。本文利用MATLAB/Simulink模型对联合循环发生器在各种工况下的性能进行了研究。
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引用次数: 1
Investigation of harmonics and watt loss of capacitors bank 电容器组谐波及瓦损的研究
Aditi A. Terkar, Hemangi N. Baxi, S. N. Pawar, R. Deshpande, M. Ranjana, S. Badave
This paper is about measurement of watt loss present in the capacitor banks when connected to the load. The main objective of this paper is to figure out losses such as eddy current loss, problems due to harmonics present in the system because of excess capacitor banks. Several parameters such as harmonics, k-factor and power factor are analyzed with the help of power analyzer. Practical values are validated with theoretical results.
本文是关于在连接到负载时电容组中瓦特损耗的测量。本文的主要目的是找出损耗,如涡流损耗,问题由于谐波存在的系统中,因为多余的电容器组。利用功率分析仪对谐波、k因子、功率因子等参数进行了分析。理论结果验证了实际应用价值。
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引用次数: 2
PLC based automated liquid mixing and bottle filling system 基于PLC的自动液体混合和灌装系统
M. Sreejeth, Shilpa Chouhan
Automating repetitive tasks in the industries increases the productivity; reduces the probability of error and maintain product quality. Traditional methods of mixing fixed quantities of different types of liquids and filling them in bottles involve manual mixing of the constituent components based on measurements and bottling of the mixture as desired. Manual handling of such tasks is time consuming; expensive and often lack consistency in product quality due to human errors. A Laboratory Prototype of a Programmable Logic Controller (PLC) based automated liquid mixing and bottle filling system is designed to automate the control and mixing of two different liquids in predefined proportion and filling the generated mixture in bottles to achieve quality control; reduce human intervention and improve productivity. The mixing system draws fluids from two storage tanks and mix them in a user selectable pre-defined proportion and stores the mixture in an overhead reservoir. The bottling system transfers the mixture from the overhead reservoir to conveyor fed empty bottles based on the user defined ladder logic. The developed laboratory prototype of the automated system has housekeeping features; which include high and low level liquid indicators; emergency alarm for warning the operator and automatic stop features etc.
工业中重复性任务的自动化提高了生产率;降低出错概率,保持产品质量。混合固定数量的不同类型液体并将其装入瓶中的传统方法涉及根据测量和所需的混合物装瓶来手动混合组成成分。手工处理这些任务非常耗时;由于人为错误,昂贵且经常缺乏产品质量的一致性。设计了一种基于可编程逻辑控制器(PLC)的自动液体混合灌装系统的实验室样机,实现了对两种不同液体按预先设定的比例进行自动控制和混合,并将生成的混合物灌装到瓶中,以实现质量控制;减少人为干预,提高生产力。混合系统从两个储罐中提取液体,并以用户可选择的预先定义的比例混合,并将混合物存储在架空储罐中。装瓶系统根据用户定义的阶梯逻辑将混合物从架空储罐转移到输送空瓶。开发的自动化系统实验室样机具有内务管理功能;其中包括高低液位指示器;紧急报警,具有警告操作人员和自动停机等功能。
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引用次数: 19
Order reduction of interval systems using Big bang Big crunch and Routh approximation 利用大爆炸大压缩和劳斯近似的区间系统降阶
N. Tanwar, R. Bhatt, G. Parmar
Today's requirement is a system which is easier to control and simple in nature. Hence, it is desirable to reduce these higher order systems into the lower order system. A system with constant coefficient but uncertain within finite range is known as interval system. A lot of work has been presented in the previous years based on the nature inspired techniques. This paper aims to reduce linear continuous time interval system using mixed evolutionary techniques. The Routh approximation is used to obtain denominator of higher order system using the generalized routh table. The numerator of reduced order system is obtained using Big bang-Big crunch optimization algorithm by minimizing integral square error between original and reduced order system. Reduced order system retains the stability and steady state value of the higher order system. The numerical examples are illustrated and results are compared with the other well known methods.
今天的要求是一个更容易控制和本质上简单的系统。因此,需要将这些高阶系统简化为低阶系统。在有限范围内具有常系数但不确定的系统称为区间系统。在过去的几年里,很多作品都是基于自然启发的技术。本文旨在利用混合进化技术对线性连续时间间隔系统进行约简。采用Routh近似,利用广义Routh表求出高阶系统的分母。通过最小化原系统与降阶系统之间的积分平方误差,采用大爆炸-大压缩优化算法得到降阶系统的分子。降阶系统保持了高阶系统的稳定性和稳态值。文中给出了数值算例,并与其他常用方法进行了比较。
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引用次数: 5
Utilization of PV solar farm for Grid Voltage regulation during night; analysis & control 利用光伏太阳能发电场进行夜间电网电压调节分析与控制
N. Solanki, J. Patel
To fulfill increasing green energy demand; installation of Photovoltaic solar farms are rapidly growing in various manners. PV solar farms feed active power during day time and become inactive in the night time. The increasing penetration level of Distributed Generations causes a rise in voltage at Point of Common Coupling (PCC) due to reverse power flow. To regulate voltage at PCC; utilities need to install voltage regulating devices like FACTs. The Voltage Source Converter is the heart of PV farm; including FACTs devices which is capable for reactive power compensation when there is no generation of PV farm. In this paper the utilization of PV solar farm for Grid voltage regulation at night time is proposed. An analysis and control in MATLAB/Simulink based environment is presented for different power flow conditions.
满足日益增长的绿色能源需求;光伏太阳能农场的安装正在以各种方式迅速增长。光伏太阳能农场在白天提供有功电力,在晚上变得不活跃。由于反向潮流的影响,分布式电源的渗透水平不断提高,导致了共耦合点电压的升高。调节PCC的电压;公用事业公司需要安装像FACTs这样的电压调节装置。电压源变换器是光伏电站的心脏;包括FACTs装置,该装置能够在没有光伏电站发电时进行无功补偿。本文提出利用光伏太阳能发电场对电网进行夜间调压。在MATLAB/Simulink环境下,对不同的潮流工况进行了分析和控制。
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引用次数: 12
Allocation of DSTATCOM and DG in distribution systems to reduce power loss using ESM algorithm 采用ESM算法对配电系统中的DSTATCOM和DG进行分配以降低功率损耗
Joseph Sanam, S. Ganguly, A. Panda
This paper contributes the optimal allocation of DSTATCOM (distribution static compensator) and DG (distributed generation) in radial distribution systems using exhaustive search method (ESM) to reduce the power loss and improvement of the voltage profile. The certain range of active and reactive powers have been injected simultaneously at each node by incorporating the corresponding size of DSTATCOMs and DGs respectively into the radial distribution system (RDS). On the basis of best reduction in power loss, the Size of DSTATCOM and DG are determined. Forward-Backward sweep load flow algorithm was used for the load flow solutions. The results obtained by proposed approach shows the optimal allocation and sizing of DSTATCOM and DG in RDS efficaciously reduces the power loss and improves the voltage profile. The IEEE-30bus RDS was used as a test system.
本文采用穷举搜索法(ESM)对径向配电系统中的分布式发电(DG)和配电静态补偿器(DSTATCOM)进行了优化配置,以降低功率损耗,改善电压分布。通过将相应尺寸的dstatcom和dg分别并入径向配电系统(RDS),在每个节点同时注入一定范围的有功和无功功率。在最大限度降低功率损耗的基础上,确定了DSTATCOM和DG的尺寸。采用正向向后扫描潮流算法求解潮流。结果表明,DSTATCOM和DG在RDS中的优化配置和尺寸有效地降低了功率损耗,改善了电压分布。采用ieee -30总线RDS作为测试系统。
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引用次数: 21
Implementation of FACTS devices for improvement of voltage stability using evolutionary algorithm 采用进化算法实现提高电压稳定性的FACTS装置
D. Kumar, Vikas Gupta, R. C. Jha
Voltage stability is considered as a very crucial factor for a stable and reliable operation of power system. In this paper an IEEE 30 bus system has been taken into account for maintaining the voltage profile at all the buses using Teaching Learning Based Optimization technique (TLBO) and Cuckoo Search Algorithm (CSA). Static Synchronous Compensator (STATCOM) and Static Synchronous Series Compensator (SSSC) are the FACTS devices which are employed for reactive power compensation. Optimal location of STATCOM is taken on the basis of voltage sensitivity indicator dV/dS. The bus which has highest value of voltage sensitivity indicator will be considered as most voltage sensitive bus (weak bus) and STATCOM will be placed at the weak buses. SSSC location will be taken on the basis of reactive power flow through the line and the line with the highest reactive power flow will be considered as the optimal line for placement of SSSC. TLBO and CSA is applied for getting optimal rating of voltage controlling parameters (STATCOM rating; SSSC rating; tap setting; Q-gen rating). Lastly a Comparision between TLBO and CSA has given for voltage stability point of view.
电压稳定被认为是电力系统稳定可靠运行的关键因素。本文采用基于教学学习的优化技术(TLBO)和布谷鸟搜索算法(CSA)对ieee30总线系统中所有总线的电压分布进行了维护。静态同步补偿器(STATCOM)和静态同步串联补偿器(SSSC)是用于无功补偿的FACTS器件。根据电压灵敏度指标dV/dS对STATCOM进行优化定位。电压敏感指标值最高的母线被认为是电压最敏感的母线(弱母线),STATCOM将被放置在弱母线上。根据线路的无功潮流来确定SSSC的位置,无功潮流最高的线路作为SSSC的最佳配置线路。采用TLBO和CSA法获得最优电压控制参数(STATCOM额定值;SSSC评级;点击设置;Q-gen评级)。最后从电压稳定性的角度对TLBO和CSA进行了比较。
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引用次数: 8
期刊
2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES)
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