PLC分布式光伏发电控制系统设计研究

在可持续发展背景下,太阳能已成为替代不可再生能源的重要清洁能源之一,其在电力行业中被广泛应用,不仅节约了资源,还不断推动电力行业与时俱进,满足新时代电力用户对优质电力服务的客观需求.本文探讨了PLC分布式光伏发电控制系统的设计方略,以期推动我国电力产业的可持续发展.     

基于Android的家庭光伏发电管理系统的设计

在分布式能源发展中与人们生活最贴近的是家庭光伏发电系统,以嵌入式系统开发为核心设计了基于Android的家庭光伏发电系统,针对光伏系统的储能设备进行了基于LPC2210微控制器的设计,提高了蓄电池的使用寿命。     

An operating method using prediction of photovoltaic power for a photovoltaic–diesel hybrid power generation system

This paper describes a novel operating method using prediction of photovoltaic (PV) power for a photovoltaic–diesel hybrid power generation system. The system is composed of a PV array, a storage battery, a bidirectional inverter, and a diesel engine generator (DG). The proposed method enables the system to save fuel consumption by using PV energy effectively, reducing charge and discharge energy of the storage battery, and avoiding low‐load operation of the DG. The PV power is simply predicted from a theoretical equation of solar radiation and the observed PV energy for a constant time before the prediction. The fuel consumption of the proposed method is compared with that of other methods by a simulation based on measurement data of the PV power at an actual PV generation system for 1 year. The simulation results indicate that the amount of fuel consumption of the proposed method is smaller than that of any other methods, and is close to that of the ideal operation of the DG. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 151(3): 8–18, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20116     

光伏电系统用胶体电池的开发

简述了太阳能光伏电系统用蓄电池的基本要求,比较了胶体电池和AGM电池的性能.胶体电池的内阻较大,更适合小电流放电;其小电流放电的低温性能良好,深放电循环寿命达420次,过放电后的电池容量达额定容量的90%以上.     

光蓄互补发电系统控制策略的研究

本文通过研究由光伏阵列、蓄电池组及其管理系统、光伏变流器、负载及电网共同组成的光蓄互补发电系统,根据蓄电池的特性和现在开关器件控制技术的发展,针对蓄电池的充/放电控制策略进行了研究,三相逆变器采用基于空间矢量脉宽调制(SVPWM)的空间矢量控制方式,在介绍了SVPWM的基本原理及合成方法后,对并网和离网两种系统工作模式的控制策略进行了研究,最后控制理论研制了光蓄互补发电系统用变流器,并搭建试验平台对系统进行试验测试,验证了控制策略的正确性。     

偏微分型光伏发电自动跟踪控制系统的研究

采用偏微分型光伏发电自动跟踪控制系统发电量可增加近50％.研究了偏微分型光伏发电自动跟踪控制系统机电部分的结构、工作原理和系统的工作特点.该跟踪装置的跟踪过程具有偏微分方程的特性与求解特征,因此称为偏微分型光伏发电自动跟踪系统.     

A study of the merits of a battery combined photovoltaic generation system for a residential house

In this paper we examine the merits that a practical photovoltaic system combining photovoltaic generation with storage batteries would provide if used in ordinary residences. Various configurations and operation methods could be envisaged for such a system. In this research we examined the optimal battery capacity, operation methods, and economic effects for a system emphasizing an economical merit for the user. We first calculated the hourly amount of photovoltaic generated electricity each month, and used data on average load patterns from actual measurements to calculate battery capacity. Next, taking battery capacity and photovoltaic module capacity/price as parameters, we calculated and evaluated the economic merit for ordinary residences. The result showed that the optimal battery capacity for combination with 3‐ or 5‐kW photovoltaic generation is around 10 kWh, and that a combined system provides a merit even though it entails higher photovoltaic module costs than the use of photovoltaic generation alone. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(4): 20–31, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10302     

Analysis of possible introduction of PV systems considering output power fluctuations and battery technology,employing an optimal power generation mix model

This paper presents an evaluation of the impact of extensive introduction of photovoltaic (PV) systems and stationary battery technology into the optimal power generation mix in the Kanto and Kinki regions. The introduction of solar PV systems is expected to be extensively deployed in the Japanese household sector and utility companies in order to address the concerns of energy security and climate change. Considering this expected large‐scale deployment of PV systems in electric power systems, it is necessary to investigate the optimal power generation mix which is technologically capable of controlling and accommodating the intermittent output‐power fluctuations inherent in PV systems. Against this background, we develop both a solar photovoltaic power generation model and an optimal power generation mix model, including stationary battery technology, which can be used to explicitly analyze the impact of PV output fluctuations at a detailed time interval resolution such as 10 minutes for 365 consecutive days. Simulation results reveal that PV introduction does not necessarily increase battery technology due to the cost competitiveness of thermal power plants in the load‐following requirement caused by PV systems. Additionally, on the basis of sensitivity analysis on PV system cost, dramatic cost reduction proves to be indispensable for PV to supply bulk electricity similarly to thermal and nuclear power plants. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 182(2): 9–19, 2013; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22329     

钒电池储能在光伏发电中的应用前景

介绍了太阳能光伏及电系统的开发现状以及应用市场前景,分析了钒电池储能系统在太阳能光伏发电系统中的应用优势。对应用于太阳能光伏发电系统的钒电池储能系统进行了系统开发设计。     

光伏发电系统自动监测与控制

对并网光伏发电系统的自动监测和控制进行了设计和研究。并网光伏发电系统中太阳电池阵列产生的直流电通过光伏并网逆变器转换为与大电网相同相位与频率的220 V或380 V正弦交流电,然后并入大电网。分布式光伏发电系统组成的微网和大电网双向交换,通过大电网调节并网光伏发电系统不足和多余的电力,使系统可靠地输出稳定、波形良好的正弦交流电。     

A method of single-phase PWM for an independent power supply in photovoltaic power generation systems

We propose a method of single-phase PWM for an independent power supply in photovoltaic power generation systems. This new PWM is derived by comparing levels of signal waves with one of carrier waves which have bipolar swing different from unipolar swing in the conventional PWM. In this PWM, we can use a battery with lower voltage in combination with the photovoltaic power generation; fundamental level of output voltage is raised by about 11%, though poor in quality of waveforms. © 1998 Scripta Technica. Electr Eng Jpn, 122(4): 55–62, 1998     

A method of estimating the output fluctuation of many photovoltaic power generation systems dispersed in a wide area

The largest output fluctuation is an index used to quantify the disturbance of a power grid caused by wind power plants and photovoltaic power generation systems connected to it. In order to develop its estimation method, we investigate the relationship between the largest output fluctuation and the standard deviation of a newly proposed random variable generated by differencing the output variation of photovoltaic power generation systems. Output fluctuation coefficients are defined and estimated using measured data of photovoltaic power generation systems located at 52 places. An approximation equation is presented to predict geographical correlations between the proposed random variables for photovoltaic power systems by using the distances between their locations. Finally, it is shown that the largest output fluctuation of many photovoltaic power generation systems dispersed in a wide area is predictable by using the output fluctuation coefficients and the equation approximating the geographical correlations of output fluctuations. ©2008 Wiley Periodicals, Inc. Electr Eng Jpn, 166(4): 9–19, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20723     

功率型DC/DC变换器在太阳能发电系统上的应用

将一组几百瓦的光伏电池与电流不连续功率型DC/DC变换器组合成单模块,并将其多块的直流输出端并联后就可得到高功率.再经过一台几千瓦的PWM变频器变为交流电输出,或向电网系统输电或向负载供电,由此构成了光伏功率变换器模块形式的太阳能发电系统.电路经过仿真测试,清楚了它的传输特性,其应用的最大特点是,无论太阳能的发电电压如...     

基于太阳能发电的光伏阵列电气系统设计

清洁能源的使用是未来社会发展的趋势。以光伏发电为研究模型,对实现太阳能的高效利用展开研究,提出了一种高效的光伏阵列,使太阳能发电系统的能源利用率得到了显著的提升。通过对太阳能发电的电气系统进行一次设计,提出了35 kV侧无功补偿装置,使得系统更加合理、有效。     

光伏发电系统并网电能质量测试数据分析

太阳能是可再生能源,光伏发电是太阳能发电的主流,近些年来,世界范围内太阳能光伏技术和光伏产业发展很快,江西省的光伏电站也在逐渐增加。厚田沙漠光伏电站是江西省内第一个并网发电的光伏发电系统,结合厚田沙漠光伏电站的并网电能质量测试,详细介绍了开展光伏电站并网电能质量测试的步骤,同时依照测试数据对光伏发电的功率变化、电压偏差、闪变以及谐波含量等方面进行了分析,可为今后光伏电站并网测试提供参考,同时为深入研究光伏并网对电网电能质量的影响提供可靠依据。     

改进风/光互补发电系统优化设计的新方法

介绍了一种改进的风/光互补发电系统优化设计的新方法,通过改变太阳电池方阵的倾角来适当改变各个月份太阳辐照量的大小及分布,使光伏发电和风力发电在各个月份的发电量更好地互相配合。通过比较各种光伏方阵倾角时各月发电量与平均值的均方根差,其最小值所对应的倾角即为最佳倾角。该方法可进一步优化结构,节省投资。     

一种新型独立光伏系统逆变器的研究

本文对独立光伏系统的逆变器的主电路拓扑、控制方法等问题做了较为详细的研究。在此基础上提出了一种新型高性能的全桥谐振式Buck-Boost逆变器拓扑,具有占用体积小,能量转换效率高等优点。在对逆变器控制方法上,提出采用电压有效值、电感电流瞬时值双闭环与零电流跟踪误差相结合的控制策略,提高系统的动静态特性。根据控制方案设计了由单片机MPS430控制的独立光伏系统逆变器的软硬件装置,实验表明它是一种效率高、性价比高、灵活性强的控制方案。     

光伏系统中蓄电池过充放电控制系统的设计

描述了光伏系统中铅蓄电池过充过放电新型控制系统。在该系统中,蓄电池的充电过程分为两个阶段：全充阶段和脉冲充电阶段。在全充阶段,系统按照光伏电池所提供的电流对蓄电池充电,其充电终止电压根据蓄电池的SOC值和充电电流的大小,采用模糊控制算法而得;脉冲充电阶段控制电压的最大值和最小值根据对蓄电池的浮充电压进行修正而得;两阶段的控制电压都将根据环境温度进行补偿。并对该系统进行了软硬件设计。经仿真证明,该系统运行稳定,效果良好。     

基于ARM的家庭光伏发电系统的设计

家庭光伏发电系统的设计是普通家庭使用清洁能源的重要研究方向。通过对比分析,设计出一套以基于ARM9的MPPT光伏控制器为核心的家庭光伏发电系统。经过实验的测试,该系统具有高转化率、高可靠性的优点,对于开发家庭光伏发电系统具有一定的推广作用。     

Forecasting electric power generation in a photovoltaic power system for an energy network

Recently, there has been an increase in concern about the global environment. Interest is growing in developing an energy network by which new energy systems such as photovoltaic and fuel cells generate power locally and electrical power and heat are controlled with a communication network. We developed the power generation forecast method for photovoltaic power systems in an energy network. The method makes use of weather information and regression analysis. We carried out forecasting power output of the photovoltaic power system installed in Expo 2005, Aichi Japan. As a result of comparing measurements with prediction values, the average prediction error per day was about 26% of the measured power. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(4): 16–23, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20755