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医院中子照射器 5

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一种低电流纹波的低压大电流DC-DC变换器的研究

王萍,孙栩,宋良瑜

《中国工程科学》 2005年第7卷第4期页码 59-63

摘要：

通过n个倍流整流结构交错并联方式用以进一步减小纹波电流。给出了电路的开关信号波形和仿真模型，并使用Pspice仿真软件对该模型进行仿真，取得满意效果。最后通过实验验证。

关键词：低压大电流DC-DC变换器倍流整流交错并联

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A comprehensive simulator for assessing the reliability of a photovoltaic panel peak power tracking system

Nabil KAHOUL,Mourad HOUABES,Ammar NEÇAIBIA

《能源前沿（英文）》 2015年第9卷第2期页码 170-179 doi: 10.1007/s11708-015-0353-y

摘要： When designing a maximum power point tracking (MPPT) algorithm, it is often difficult to correctly predict, before field testing, the behavior of this MPPT under varying solar irradiation on photovoltaic (PV) panels. A solution to this problem is to design a maximum power point trackers simulator of a PV system used to test MPPT algorithms. This simulator must have the same role as the MPPT card of the PV panel and thus will fully emulate the response of a real MPPT card of the PV panel. Therefore, it is a good substitute to help to test the peak power trackers of the PV system in the laboratory. This paper describes a simple peak power trackers simulator of the PV system which has a short response time thus, can be used to test MPPT algorithms under very rapid variation condition. The obtained results and the theoretical operation confirm the reliability and the superior performance of the proposed model.

关键词： photovoltaic module DC-DC converter design maximum power point tracking (MPPT) card microprocessor

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具有双支路交错拓扑结构和轻载效率优化模式的大电流、高集成度开关电容分压器 Research Articles

刘胜1,赵梦恋2,杨朝2,吴皓楠2,吴晓波1

《信息与电子工程前沿（英文）》 2022年第23卷第2期页码 317-327 doi: 10.1631/FITEE.2000404

摘要：由于无磁且容易实现高集成度，开关电容（SC）变换器作为一种直流变压器在现代电子领域具有广泛应用前景。然而，设计具有大电流和高功率的SC变换器仍面临挑战。本文提出一种双支路SC分压器拓扑，并通过集成电路（IC）得以实现。所设计SC变换器能驱动大电流负载，将其使用范围扩展至大功率应用场合。该SC变换器具有1/2的恒定变换比，其双支路交错操作方式可确保输入电流的连续性。此外，提出一种使用电容耦合型浮动电压电平转换器的片上栅极驱动方法有效驱动全NMOS功率链。所设计SC变换器IC使用180 nm三阱BCD工艺制造。实验结果证明了所提双支路交错操作方式和自供电栅极驱动方法的有效性。所设计SC变换器可在5至12 V的输入电压下驱动高达4 A的负载电流，功率效率高达96.5％。在轻负载条件下，使用所提优化方法，电源效率提高了30％。

关键词：开关电容变换器；双支路；集成电路；自举栅极驱动器

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Toward a nonlinear control of an AC-DC-PWM converter dedicated to induction heating

Amel HADRI-HAMIDA, S. ZEROUALI, A. ALLAG

《能源前沿（英文）》 2013年第7卷第2期页码 140-145 doi: 10.1007/s11708-013-0243-0

摘要： In this paper, a nonlinear control strategy applied to an AC-DC-pulse width modulation (PWM) converter is developed and simulated. First a nonlinear system modeling is derived with state variables of the input current and the output voltage by using power balance of the input and output. The system is linearized and decoupled, and then a state feedback law is obtained. For robust control of parameter perturbation, integrators are added to the exact feedback control law. The simulation is provided to verify the validity of the control algorithm.

关键词： DC-DC converter AC-DC-pulse width modulation (PWM) converter induction heating nonlinear control

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Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence

Shagufta KHAN,Suman BHOWMICK

《能源前沿（英文）》 2015年第9卷第4期页码 399-412 doi: 10.1007/s11708-015-0374-6

摘要： This paper demonstrates the convergence of the integrated AC-DC power-flow algorithm as affected by the selection of different base values for the DC quantities and adoption of different control strategies for the DC link. For power-flow modeling of integrated AC-DC systems, the base values of the various DC quantities can be defined in several ways, giving rise to different sets of per-unit system equations. It is observed that different per-unit system models affect the convergence of the power-flow algorithm differently. In a similar manner, the control strategy adopted for the DC link also affects the power-flow convergence. The sequential method is used to solve the DC variables in the Newton Raphson (NR) power flow model, where AC and DC systems are solved separately and are coupled by injecting an equivalent amount of real and reactive power at the terminal AC buses. Now, for a majority of the possible control strategies, the equivalent real and reactive power injections at the concerned buses can be computed a-priori and are independent of the NR iterative loop. However, for a few of the control strategies, the equivalent reactive power injections cannot be computed a-priori and need to be computed in every NR iteration. This affects the performance of the iterative process. Two different per-unit system models and six typical control strategies are taken into consideration. This is validated by numerous case studies conducted on the IEEE 118-bus and 300-bus test systems.

关键词： AC-DC power-flow Newton-Raphson method high voltage direct current (HVDC) control strategy

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一种具有高电压传输比的新型Cuk矩阵变换器

张小平,朱建林,唐华平,张炳根,柳莎莎

《中国工程科学》 2008年第10卷第4期页码 78-83

摘要：

对传统矩阵变换器存在电压传输比低的缺陷进行研究，提出一种新型的称为Cuk矩阵变换器的电路拓扑结构。结果表明：该拓扑结构能实现输出电压和频率的任意调节，其电压传输比可大于1，也可小于1，且直接输出标准的正弦波而无需滤波环节，有效地解决了传统矩阵变换器电压传输比低的难题，具有一定的应用价值。

关键词： Cuk矩阵变换器电路拓扑电压传输比双闭环控制仿真

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Implementation of photovoltaic water pumping system with MPPT controls

Najet REBEI,Ali HMIDET,Rabiaa GAMMOUDI,Othman HASNAOUI

《能源前沿（英文）》 2015年第9卷第2期页码 187-198 doi: 10.1007/s11708-015-0359-5

摘要： To increase the output efficiency of a photovoltaic (PV) system, it is important to apply an efficient maximum power point tracking (MPPT) technique. This paper describes the analysis, the design and the experimental implementation of the tracking methods for a stand-alone PV system, using two approaches. The first one is the constant voltage (CV) MPPT method based on the optimum voltage, which was deduced experimentally, and considered as a reference value to extract the optimum power. The second one is the increment conductance (Inc-Cond) MPPT method based on the calculation of the power derivative extracted by the installation. The output controller can adjust the duty ratio to the optimum value. This optimum duty ratio is the input of a DC/DC boost converter which feeds a set of Moto-pump via a DC/AC inverter. This paper presents the details of the two approaches implemented, based on the system performance characteristics. Contributions are made in several aspects of the system, including converter design, system simulation, controller programming, and experimental setup. The MPPT control algorithms implemented extract the maximum power point (MPP), with satisfactory performance and without steady-state oscillation. MATLAB/Simulink and dSpace DS1104 are used to conduct studies and implement algorithms. The two proposed methods have been validated by implementing the performance of the PV pumping systems installed on the roof of the research laboratory in INSAT Tunisia. Experimental results verify the feasibility and the improved functionality of the system.

关键词： photovoltaic generator (PVG) maximum power point tracking (MPPT) boost DC/DC converter DC/AC inverter moto-pump

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A linear quadratic regulator control of a stand-alone PEM fuel cell power plant

Amar BENAISSA, Boualaga RABHI, Ammar MOUSSI, Dahmani AISSA

《能源前沿（英文）》 2014年第8卷第1期页码 62-72 doi: 10.1007/s11708-013-0291-5

摘要： This paper introduces a technique based on linear quadratic regulator (LQR) to control the output voltage at the load point versus load variation from a stand-alone proton exchange membrane (PEM) fuel cell power plant (FCPP) for a group housing use. The controller modifies the optimal gains by minimizing a cost function, and the phase angle of the AC output voltage to control the active and reactive power output from an FCPP to match the terminal load. The control actions are based on feedback signals from the terminal load, output voltage and fuel cell feedback current. The topology chosen for the simulation consists of a 45 kW proton exchange membrane fuel cell (PEMFC), boost type DC/DC converter, a three-phase DC/AC inverter followed by an LC filter. Simulation results show that the proposed control strategy operated at low commutation frequency (2 kHz) offers good performances versus load variations with low total harmonic distortions (THD) , which is very useful for high power applications.

关键词： modeling of proton exchange membrane fuel cell (PEMFC) controlling of PEMFC linear quadratic regulator (LQR) DC/DC converter DC/AC inverter

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一种汽油变频发电机组中的辅助直流电源设计

万健如,牛亮,刘建华,牟江峰,余小红

《中国工程科学》 2007年第9卷第4期页码 31-34

摘要：

针对汽油变频发电机组中逆变器所需多组低压直流电源问题，设计了一种多路输出的开关辅助电源，结构简单紧凑、输出电压纹波小、体积小、成本低；通过分析高频变压器的设计原理

关键词：汽油变频发电机组直流辅助电源三端单片开关电源高频变压器

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DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable

Youcef BEKAKRA,Djilani BEN ATTOUS

《能源前沿（英文）》 2014年第8卷第3期页码 345-354 doi: 10.1007/s11708-014-0330-x

摘要： This paper proposes an indirect power control of doubly fed induction generator (DFIG) with the rotor connected to the electric grid through a back-to-back pulse width modulation (PWM) converter for variable speed wind power generation. Appropriate state space model of the DFIG is deduced. An original control strategy based on a variable structure control theory, also called sliding mode control, is applied to achieve the control of the active and reactive power exchanged between the stator of the DFIG and the grid. A proportional-integral-(PI) controller is used to keep the DC-link voltage constant for a back-to-back PWM converter. Simulations are conducted for validation of the digital controller operation using Matlab/Simulink software.

关键词： doubly fed induction generator (DFIG) wind turbine back-to-back pulse width modulation (PWM) DC-link voltage sliding mode control

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一种新颖的用于宽输入电压范围的LLC谐振变换器的变模态控制策略 Article

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

《信息与电子工程前沿（英文）》 2017年第18卷第3期页码 410-422 doi: 10.1631/FITEE.1600029

摘要：本文提出了一种新颖的适用于LLC谐振变换器的混合模态控制策略，可以使得LLC谐振变换器输入宽电压范围。这种控制策略结合了全桥LLC谐振变换器，半桥LLC谐振变换器，变频控制和变脉宽控制的优点。这种电路模态的切换是由数字信号处理器（digital signal processor, DSP）来实现的，不需要外加辅助电路，只需要修改一下软件。从轻载到重载下，LLC谐振变换器的原边MOSFET可以实现零电压开通（zero-voltage switching, ZVS），副边二极管可以实现零电流关断（zero-current switching本文用一个额定功率300 W，输出电压450 V的LLC，输入电压20 V到120 V的谐振变换器的样机验证了这个优化的控制策略。实验结果显示，在这种控制策略下，变换器的最大工作效率可以达到95.7%，并且输入电压范围扩大了3倍。

关键词：串并联谐振变换器；全桥；半桥；变频；移相；宽范围输入电压

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交直流电力集成技术

马伟明

《中国工程科学》 2002年第4卷第12期页码 53-59

摘要：得出了稳定判据及解决稳定问题的技术措施；通过合理设计，可控制直流电压的浮动范围；综合治理整流过程引起的交流谐波和直流脉动，提高了系统的EMC性能；巧妙地处理了系统的强非线性，从而得出了直流短路和交直流同时短路的冲击电流解析式在此基础上，将定子3相绕组、12相绕组、整流装置、励磁系统、励磁调节器等集于一体，功研制出性能优良的交直流发电机，能同时提供高品质交直流电源，为独立电力系统的集成化奠定了基础。

关键词：电力集成双绕组交直流发电机 12相整流交直流同时供电独立电力系统

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Rapid transaction to load variations of active filter supplied by PV system

M. BENADJA,S. SAAD,A. BELHAMRA

《能源前沿（英文）》 2014年第8卷第3期页码 335-344 doi: 10.1007/s11708-014-0325-7

摘要： This paper deals with the analysis and control of a photovoltaic (PV) system connected to the main supply through a Boost converter and shunt active filter supplied by a PV system providing continuous supply of nonlinear load in variation. A robust control of a PV system connected to the grid while feeding a variable nonlinear load is developed and highlighted. This development is based on the control of the Boost converter to extract the maximum power from the PV system using the Perturb and Observe (P and O) algorithm in the presence of temperature and illumination. The proposed modeling and control strategy provide power to the variable nonlinear load and facilitates the transfer of power from solar panel to the grid while improving the quality of energy (harmonic currents compensation, power factor compensation and dc bus voltage regulation). Validation of the developed model and control strategy is conducted using power system simulator Sim-Power System Blockset Matlab/Simulink. To demonstrate the effectiveness of the shunt active filter to load changes, the method of instantaneous power ( theory) is used to identify harmonic currents. The obtained results show an accurate extraction of harmonic currents and perfect compensation of both reactive power and harmonic currents with a lower THD and in accordance with the IEEE-519 standard.

关键词： solar panels maximum power point tracking (MPPT) DC/DC converter (Boost) shunt active filter instantaneous power control power quality harmonics imbalances reactive energy