光伏充电控制器温度补偿的研究

对具有温度补偿功能的光伏系统充电控制器的设计与应用进行研究。利用半导体温度传感器对蓄电池过充点保护电压自动温度补偿的方法，实现了充电控制器在充电过程中的自动温度补偿功能，从而提高了光伏系统的可靠性以及延长了蓄电池的使用寿命。该研究成果具有实际推广应用价值。     

风力发电机组并网控制器

该文介绍一种大中型风力发电机并网运行的控制器，它具有，性能稳定、抗干扰能力强的特点．，能完成数据采样、显示及实时监控的任务．文章以ＦＤ１６—７５ｋＷＡ网型风力发电机的并网运行控制为例，详细说明控制器的软硬件设计和现场投运情况．     

国产200kW风力发电机微机控制器

国产２００ｋＷ风力发电机微机控制器高海建目前国外大中型风力发电机普遍采用微机控制，实现风力机群自动控制，无人值守。该微机控制器是以８０３１单片机为主芯片的控制系统，可实现无人值守，自动记录数据，故障判断，汉字显示和机群集中管理。１系统硬件结构该系统采...     

电动汽车充电网关控制器开发

外接充电是纯电动车获取能量的唯一途径,而各国充电标准存在较大差异,导致按照不同标准设计的充电桩之间不匹配。为了快速解决该问题,对两个完全不同的充电标准进行了对比分析,并对一款成熟的发动机控制器的硬件结构进行了优化配置,开发了一款充电网关控制器。通过模拟北美标准(SAE)中的局域网络信号,并将其转换为国家标准(GB)中的局域网络信号,实现了不同充电标准协议之间的转换。通过试验验证了设计该控制器的合理性,并使一款符合北美标准的电动汽车在符合国家标准的充电桩上实现了快速直流充电。     

太阳能综合供电系统充电控制器的设计

简要介绍了太阳能扬水与照明综合应用系统的组成；侧重描述系统充电控制器的硬件原理和软件设计流程；并结合试制产品的实验情况，分析了系统可靠性、高效性及智能化等优点。     

可编程控制器在风力发电机控制系统中的应用

文章介绍了可编程控制器在几力发电机组控制系统应用及使用特点，并以IP3416－16在FD24－200kW风力发电机控制系统中的应用为例，阐述了可编程控制系统的组成，技术要点、软件和硬件设计。     

可编程控制器实现风力发电机安全运行的处理方法

针对５５ｋＷ风力发电机对控系统特殊要求，结合可编程序控制器的性能特点，利用Ｃ６０Ｐ型可编程序控制器成功地实现了国产中型风力发电机控制系统的长时间安全运行。     

一种智能光伏充电控制器的设计

介绍了一种基于低功耗比较器MAX923的智能光伏充电控制器。通过实验验证,该系统充电效率高,特别是在弱光天气情况下,也能很好地将光能转化为电能,充分利用了太阳能。相对于传统的单片机控制的光伏充电控制器,不仅可靠性高,而且成本大幅降低,值得推广应用。     

Small wind power generation using automotive alternator

The objective of this paper is to evaluate the feasibility of using claw pole automotive alternator as a generator for small wind turbine and to compare its energy yield and generated electricity cost with commercially available systems. The comparison is based on the energy yield per swept area and cost per energy produced in a low wind speed climate. Concepts such as the selection of suitable turbine parameters and gear ratio were used to achieve good matching of the turbine characteristics with measured alternator performance in order to improve the energy yield from the alternator in battery charging application. The energy yield from the alternator integrated to a 3.9 m diameter turbine is comparable with many commercially available turbines. The generated electricity cost of a commercially available turbine can be reduced by more than a factor of 2 by replacing its generator with our proposed alternator. The alternator-based turbine system is therefore a low cost solution aimed at making wind energy available to areas where the current cost of wind technology makes it prohibitive.     

Interrelation between configuration of electrodes for induction electric charging and collector current wind EHD power generator

This work aims to realize a wind electrohydro- dynamical (EHD) power generator using induction electric charging with a water jet. The electrodes for induction electric charging are composed of an orifice of which inner radius is 1.5mm and a ring made of a copper wire of which diameter is 1.5mm. It is important to design the electrodes that maximize induction electric charge. In this paper, it is experimentaly clarified that the ring electrode of inner diameter of 3.7cm gives the collector short current of the wind EHD power generator more than that of 4.7cm but has dispersion of the collector short current more than that of 4.7 cm.     

Offshore wind power grid connection—The impact of shallow versus super-shallow charging on the cost-effectiveness of public support

Public support for electricity generation from renewable energy sources is commonly funded by non-voluntary transfers from electricity consumers to producers. Apparently, the cost-effective disposition of funds in terms of induced capacity deployment has to be regarded a key criterion for the success of renewable energy policy.     

风切变对大直径风力机风轮输出功率影响的初探

以风切变幂指数为0．14的风廓线模型进行了风轮输出功率计算,并与以风轮中心风速计算风轮功率进行了对比分析,指出风切变对风轮输出功率的影响不容忽视。     

一种带MPPT的车载太阳能充电系统设计

针对在电动车充电应用的光伏发电系统充电时间长、充电电压波动大和最大功率点跟踪(MPPT)速度慢的问题,设计了一种车载工况下的太阳能充电系统。提出了基于增量电导法的、适合车载环境下的修正变步长增量电导MPPT法。对充电系统中实现MPPT控制的Boost电路、用于充电控制的Buck电路和PI控制器进行了分析和建模。通过电力仿真(PSIM)实验和蓄电池充电实验,验证了带MMPT和双环PI控制结构的太阳能充电系统具有在车载工况下MPPT跟踪速度快、充电时间短、充电电压稳态精度高和抗扰性能强等优势。     

Fuzzy logic based MPPT controller for high conversion ratio quadratic boost converter

In this study, a maximum power point tracking DC–DC quadratic boost converter for high conversion ratio required applications is proposed. The proposed system consists of a quadratic boost converter with high step-up ratio and fuzzy logic based maximum power point tracking controller. The fuzzy logic based maximum power point tracking algorithm is used to generate the converter reference signal, and the change in PV power and the change in PV voltage are selected as fuzzy variables. Determined membership functions and fuzzy rules which are design to track the maximum power point of the PV system generates the output signal of the fuzzy logic controller's output. It is seen from MATLAB/Simulink simulation and experimental results that the quadratic boost converter provides high step-up function with robustness and stability. In addition, this process is achieved with low duty cycle ratio when compared to the traditional boost converter. Furthermore, simulation and experimental results have validated that the proposed system has fast response, and it is suitable for rapidly changing atmospheric conditions. The steady state maximum power point tracking efficiency of the proposed system is obtained as 99.10%. Besides, the output power oscillation of the converter, which is a major problem of the maximum power point trackers, is also reduced.     

SSCI mitigation of grid‐connected DFIG wind turbines with fractional‐order sliding mode controller

To mitigate subsynchronous control interaction (SSCI) in doubly fed induction generator (DFIG)‐based wind farm, this paper proposes a robust controller for rotor‐side converter (RSC) using fractional‐order sliding mode controller (FOSMC). The proposed FOSMC can improve robustness and convergence properties of the controlled system, thus achieving SSCI damping under various operating conditions. Impedance‐based analysis and time‐domain simulation are performed to check the capability of the designed FOSMC as compared with conventional sliding mode control (SMC) and subsynchronous damping control (SSDC). Simulation results demonstrate that FOSMC can mitigate SSCI within shorter time and effectively reduce the fluctuation range of system transient responses under various operating conditions of wind speeds and compensation levels. Moreover, FOSMC also improves system robustness against parameter uncertainties and external disturbances, which is important for safe operation of realistic wind farms.     

New design of robust PID controller based on meta‐heuristic algorithms for wind energy conversion system

This paper proposes a new robust control method for a wind energy conversion system. The suggested method can damp the deviations in the generator speed because of the penetration of wind speed and load demand fluctuations in the electrical grid. Furthermore, it can overcome the uncertainties of the plant parameters because of load demand fluctuations and the errors of the implementation. The new method has been built based on new simple frequency‐domain conditions and the whale optimization algorithm (WOA). This method is utilized to design a robust proportional‐integral‐derivative (PID) controller based on the WOA in order to enhance the damping characteristics of the wind energy conversion system. Simulation results confirm the superiority and robustness of the proposed technique against the wind speed fluctuations and the plant parameters uncertainties compared with other meta‐heuristic algorithms.     

Investigation on the integral output power model of a large-scale wind farm

The integral output power model of a large-scale wind farm is needed when estimating the wind farm’s output over a period of time in the future. The actual wind speed power model and calculation method of a wind farm made up of many wind turbine units are discussed. After analyzing the incoming wind flow characteristics and their energy distributions, and after considering the multi-effects among the wind turbine units and certain assumptions, the incoming wind flow model of multi-units is built. The calculation algorithms and steps of the integral output power model of a large-scale wind farm are provided. Finally, an actual power output of the wind farm is calculated and analyzed by using the practical measurement wind speed data. The characteristics of a large-scale wind farm are also discussed.