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Fault tolerant control strategy for modular PWM current source inverter

《能源前沿（英文）》 doi: 10.1007/s11708-022-0852-6

摘要： In this paper, a fault-tolerant control method for an input-series output-parallel modular grid-tied pulse-width modulation (PWM) current source inverter is proposed to address the most commonly seen single symmetrical gate-commutated thyristor (SGCT) open-circuit fault problems. This method actively offsets the neutral point of the current space vector to ensure a sinusoidal output of the grid current, and it can achieve the upper limit power of the inverter under the condition of a single SGCT open-circuit fault. In addition, an active damping control method based on grid harmonic current feedback is proposed after analyzing the influence of the transformer ferromagnetic resonance caused by the neutral point offset on the power quality of the grid current. It has been demonstrated that the proposed method effectively suppresses the resonance caused by the transformer and the modified modulation, improving the grid current’s power quality.

关键词： current source converter (CSC) fault-tolerant control space vector modulation active damping resonance suppression power quality

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Development and advances in modular multilevel converter based HVDC projects in China

《工程管理前沿（英文）》页码 183-189 doi: 10.1007/s42524-022-0248-7

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关键词： high voltage direct current power converter power systems renewable energy ultra-high voltage

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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。这种结构特别适用于通信设备、计算机、宇航等领域的电源。

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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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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电流型有源电力滤波器的神经网络滞环控制

王萍,张珂,许会军

《中国工程科学》 2007年第9卷第1期页码 40-43

摘要：

神经网络滞环控制就是将神经网络和滞环比较器这两种方法相结合的一种控制方法。滞环控制是控制方法中较为简单的一种，它不需要系统太多的参数，实时性较好，但用滞环控制方法时系统开关频率不固定，这不仅影响电子开关的使用寿命，而且降低了系统的稳定性。将二者结合的控制方法不仅可实现神经网络对快速变量的控制，而且可以提高滞环控制的性能。通过训练神经网络能够完成滞环比较器的功能，并可取代滞环比较器。给出了计算机仿真结果，神经网络通过DSP实现。

关键词：有源滤波神经网络滞环比较器

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Real-time simulation platform for photovoltaic system with a boost converter using MPPT algorithm in

Geethanjali PURUSHOTHAMAN, Vimisha VENUGOPALAN, Aleena Mariya VINCENT

《能源前沿（英文）》 2013年第7卷第3期页码 373-379 doi: 10.1007/s11708-013-0272-8

摘要： Recently, real-time simulation of renewable energy sources are indispensible for evaluating the performance of the maximum power point tracking (MPPT) controller, especially in the photovoltaic (PV) system in order to reduce cost in the testing phase. Nowadays, real time PV simulators are obtained by using analog and/or digital components. In this paper, a real-time simulation of a PV system with a boost converter was proposed using only the digital signal processor (DSP) processor with two DC voltage sources to emulate the temperature and irradiation in the PV system. A MATLAB/Simulink environment was used to develop the real-time PV system with a boost converter into a C-program and build it into a DSP controller TMS320F28335. Besides, the performance of the real-time DSP-based PV was tested in different temperature and irradiation conditions to observe the P-V and V-I characteristics. Further, the performance of the PV with a boost converter was tested at different temperatures and irradiations using MPPT algorithms. This scheme was tested through simulation and the results were validated with that of standard conditions given in the PV data sheets. Implementation of this project helped to attract more researchers to study renewable energy applications without real sources. This might facilitate the study of PV systems in a real-time scenario and the evaluation of what should be expected for PV modules available in the market.

关键词： photovoltaic (PV) module digital signal processor (DSP) controller power electronic converter real-time simulation

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大功率交流电机变频调速技术的研究

李崇坚

《中国工程科学》 2009年第11卷第5期页码 31-36

摘要：

论述了我国大功率交交（AC-AC）变频调速技术的研究和国产化装备的研制工程，丰富并完善了大功率交流调速理论，形成了自主创新的核心技术，解决了大功率交流调速装备的多项关键技术，推动国产交流调速装备步入国际先进行列，立足工程，取得显著的经济效益和社会效益；并介绍了我国第一套7.5 MVA三电平IGCT交直交（AC-DC-AC）变频调速系统的研制，该变频器结构紧凑、性能良好、运行可靠，达到国际先进水平。

关键词：大功率交流电机交流调速交交变频交直交变频

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Attuned design of demand response program and M-FACTS for relieving congestion in a restructured market environment

Y. HASHEMI,H. SHAYEGHI,B. HASHEMI

《能源前沿（英文）》 2015年第9卷第3期页码 282-296 doi: 10.1007/s11708-015-0366-6

摘要： This paper addresses the attuned use of multi-converter flexible alternative current transmission systems (M-FACTS) devices and demand response (DR) to perform congestion management (CM) in the deregulated environment. The strong control capability of the M-FACTS offers a great potential in solving many of the problems facing electric utilities. Besides, DR is a novel procedure that can be an effective tool for reduction of congestion. A market clearing procedure is conducted based on maximizing social welfare (SW) and congestion as network constraint is paid by using concurrently the DR and M-FACTS. A multi-objective problem (MOP) based on the sum of the payments received by the generators for changing their output, the total payment received by DR participants to reduce their load and M-FACTS cost is systematized. For the solution of this problem a nonlinear time-varying evolution (NTVE) based multi-objective particle swarm optimization (MOPSO) style is formed. Fuzzy decision-making (FDM) and technique for order preference by similarity to ideal solution (TOPSIS) approaches are employed for finding the best compromise solution from the set of Pareto-solutions obtained through multi-objective particle swarm optimization-nonlinear time-varying evolution (MOPSO-NTVE). In a real power system, Azarbaijan regional power system of Iran, comparative analysis of the results obtained from the application of the DR & unified power flow controller (UPFC) and the DR & M-FACTS are presented.

关键词： multi-converter flexible alternative current transmission systems (M-FACTS) demand response fuzzy decision making multi-objective particle swarm optimization-nonlinear time-varying evolution (MOPSO-NTVE)

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Development of source profiles and their application in source apportionment of PM

Ningning Zhang, Mazhan Zhuang, Jie Tian, Pengshan Tian, Jieru Zhang, Qiyuan Wang, Yaqing Zhou, Rujin Huang, Chongshu Zhu, Xuemin Zhang, Junji Cao

《环境科学与工程前沿（英文）》 2016年第10卷第5期 doi: 10.1007/s11783-016-0879-1

摘要： Seasonal and spatial distribution of PM and its component were shown. Local source profiles of major PM sources were developed. Source apportionment was conducted using CMB model. Inorganic secondary components is the biggest contribution at Xiamen. Ambient PM samples were collected at four sites in Xiamen, including Gulangyu (GLY), Hongwen (HW), Huli (HL) and Jimei (JM) during January, April, July and October 2013. Local source samples were obtained from coal burning power plants, industries, motor vehicles, biomass burning, fugitive dust, and sea salt for the source apportionment studies. The highest value of PM mass concentration and species related to human activities (SO , NO , Pb, Ni, V, Cu, Cd, organic carbon (OC) and elemental carbon (EC)) were found in the ambient samples from HL, and the highest and lowest loadings of PM and its components occurred in winter and summer, respectively. The reconstructed mass balance indicated that ambient PM consisted of 24% OM (organic matter), 23% sulfate, 14% nitrate, 9% ammonium, 9% geological material, 6% sea salt, 5% EC and 10% others. For the source profiles, the dominant components were OC for coal burning, motor vehicle, biomass burning and sea salt; SO for industry; and crustal elements for fugitive dust. Source contributions were calculated using a chemical mass balance (CMB) model based on ambient PM concentrations and the source profiles. GLY was characterized by high contributions from secondary sulfate and cooking, while HL and JM were most strongly affected by motor vehicle emissions, and biomass burning and fugitive dust, respectively. The CMB results indicated that PM from Xiamen is composed of 27.4% secondary inorganic components, 20.8% motor vehicle emissions, 11.7% fugitive dust, 9.9% sea salt, 9.3% coal burning, 5.0% biomass burning, 3.1% industry and 6.8% others.

关键词： PM_2.5 Source profile Source apportionment CMB Xiamen

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The source and transport of bioaerosols in the air: A review

《环境科学与工程前沿（英文）》 2021年第15卷第3期 doi: 10.1007/s11783-020-1336-8

摘要：

• Emission of microbe from local environments is a main source of bioaerosols.

关键词： Bioaerosols Diffusion Source identification Biogeography

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δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

《环境科学与工程前沿（英文）》 2021年第15卷第6期 doi: 10.1007/s11783-021-1414-6

摘要：

• Challenges in sampling of NH₃ sources for d¹⁵N analysis are highlighted.

关键词： Aerosol ammonium Atmospheric gaseous ammonia Isotope fingerprinting Isotope-based source apportionment Ammonia gas-to-particle conversion

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Performance investigation of artificial intelligence based controller for three phase four leg shunt active filter

J. JAYACHANDRAN,R. MURALI SACHITHANANDAM

《能源前沿（英文）》 2015年第9卷第4期页码 446-460 doi: 10.1007/s11708-015-0378-2

摘要： In this paper, the choice of power quality compensator is a DSTATCOM which constitutes a three phase four leg voltage source converter (VSC) with a DC capacitor. The control strategy proposed for the DSTATCOM is a neural network based one cycle control (OCC). This control strategy involves neural network block, digital circuits and linear elements, which eliminates the sensors required for sensing the load current and coupling inductor current in addition to the multiplier employed in the conventional method. The calculation of harmonic and reactive currents for the reference current generation is also eliminated, thus minimizing the complexity in the control strategy. The control strategy mitigates harmonic/reactive currents, ensures balanced and sinusoidal source current from the supply mains that are nearly in phase with the supply voltage, compensates neutral current, and maintains voltage across the capacitor under unbalanced source and load conditions. The performance of the DSTATCOM with the proposed artificial neural network (ANN) controllers is validated and investigated through simulations using Matlab software. The simulation results prove the efficacy of the proposed neural network based control strategy under varying source and load conditions.

关键词： neural network DSTATCOM neutral current mitigation total harmonic distortion (THD) three phase four wire distribution system unbalanced and/or distorted source

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农业面源污染现状及防控技术

武淑霞, 刘宏斌, 刘申, 王耀生, 谷保静, 金书秦, 雷秋良, 翟丽梅, 王洪媛

《中国工程科学》 2018年第20卷第5期页码 23-30 doi: 10.15302/J-SSCAE-2018.05.004

摘要：

农业面源污染是造成我国水环境污染的主要因素之一，具有随机性强、污染排放不固定、污染负荷变化大等特点，防治较点源污染更为困难，了解农业面源污染现状及其防控技术是进行面源污染治理的前提。本文概述了农业面源污染成因及其现状，指出种植业中肥料的不合理施用和规模化畜禽养殖排污是当前最重要的农业面源污染来源，较全面地介绍了种植业和畜禽养殖业中较为成熟的面源污染防控技术，提出“源头控制为主、过程阻控与末端治理相结合”是当前进行农业面源污染防控的主要途径，应因地制宜地采用相应的面源污染防控技术，实现环境效益、经济效益和社会效益的同步发展。

关键词：农业面源污染农田养分流失畜禽养殖排污防控技术

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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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一种面向恒流输电水下观测网的无级功率重构转换器 Research Article

臧玉嘉1,2,陈燕虎1,杨灿军1,张浩宇1,段志勇1,Gul MUHAMMAD1

《信息与电子工程前沿（英文）》 2021年第22卷第12期页码 1551-1684 doi: 10.1631/FITEE.2100259

摘要：恒流（CC）电能到恒压（CV）电能的转换是恒流输电水下观测网的关键技术之一。该系统通常采用具有高稳定性和高可靠性的并联稳压器以稳定输出电压。然而，并联稳压方法存在高热损耗和低转换效率的缺点。本文对传统并联稳压方法进行改进，提出一种CC/CV转换模块的无级功率重构方法。针对稳定负载或缓慢变化负载的应用场景，介绍两种无级功率重构转换模式：（1）基于单环控制的手动无级功率重构（MSPR）；（2）基于内—外环控制的自动无级功率重构（ASPR）。所述方法在保证系统留有预设功率裕度的同时，可以尽可能减少并联稳压方法中不必要的能量损失。分析了该方法的转换效率，讨论了系统关键参数选择方法。实验结果表明，MSPR和ASPR方法均保留了并联稳压方法的高稳定优点，同时降低了CC/CV转换模块的热耗散，提高了CC/CV转换效率。

关键词：恒流/恒压转换；并联稳压器；无级功率重构；水下观测网

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标题作者时间类型操作

Fault tolerant control strategy for modular PWM current source inverter

期刊论文

Development and advances in modular multilevel converter based HVDC projects in China

期刊论文

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

期刊论文

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

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