摘要：The initial parameters of the superconducting magnetic energy storage (SMES) fed by a voltage source converter (VSMES) are studied and the setting rules are designed in this paper. A time-domain simulation model is established by using the software PSCAD/EMTDC. Based on this model, the application of the VSMES in the power system is used to test the designed rules. The simulation results are valuable for the further research of the initial parameters design of the VSMES.

摘要：The results of comparative DC simulation tests confirm that a proposed modification to the feedback circuit of a Flipped voltage Follower (FVF), to produce a type of ‘Folded’ Flipped voltage Follower (FFVF), is capable of maximising the linear DC operating range for given values of supply rail voltage and operating current.

摘要：A series connected power semiconductor array, with digital control capability could be used for developing single phase AC regulators or other applications such as AC electronic loads. This technique together with an ordinary gapless transformer could be used to develop a low cost AC voltage regulator (AVR) to provide better or comparable specifications with bulky ferro-resonant AVR types. One primary advantage of the technique is that digital control can be used to minimize harmonics. Commencing with a review of AC voltage regulator techniques for single phase power conditioning systems, an analysis and design aspects of this technique is presented with experimental results for AVRs. Guidelines on how to utilize the technique in a generalized basis is also summarized together with a summary of a technique for achieving harmonic control.

摘要：At Physikalisch-Technische Bundesanstalt (PTB), superconducting 10 V circuits for the programmable Josephson voltage standard (PJVS) are routinely manufactured on the basis of NbxSi1-x barrier junctions. This paper describes in detail the basic design principles for an operating frequency of 70 GHz. It starts with single junctions, discusses their insertion into microstriplines and closes with the whole microwave circuit containing 69,632 NbxSi1-x barrier junctions arranged over 128 microstriplines connected in parallel. The microwave attenuation of this junction type is a key parameter for the 10 V design and we report its experimental determination. Special attention has been devoted to subarrays with just a few Josephson junctions in one of the outermost striplines. The arrangement of these subarrays determines the optimum performance of the complete 10 V series array. The high performance of programmable 10 V circuits fabricated at PTB is characterized by measured operating margins in all subarrays of more than 1 mA centered at the same dc bias current. The observed modulation of the current margins, when changing the frequency around 70 GHz, is explained by microwave reflections caused by the rf waveguide inside the cryoprobe. We determine the current margins in dependence of the output power of a microwave synthesizer and show that 60 mW is sufficient to achieve current margins larger than 1 mA.

摘要：本文简要介绍了voltageComParato的设计过程，并着重讨论了设计的总体框图和失真较真方面的技术极其结构，并对工作时序和仿真的过程方面进行了陈述。

摘要：Based on orthogonal experiments,the effects of voltage,frequency,duty ratio and their interactions on the thickness and corrosion resistance of coatings prepared by plasma electrolytic oxidation(PEO)on aluminum in an alkaline silicate-containing electrolyte were *** thicknesses of these coatings were obtained by measuring their cross-section using Image J *** corrosion resistances were evaluated in HCl and NaCl media through spot test and electrochemical *** results show that the experimental design of this study is the key to investigate the interactions among these electrical ***,not only each independent factor,but also their interactions exhibit a remarkable influence on the *** combination of high voltage,low frequency and large duty ratio significantly increases the coating thickness and content of the corrosion resistance phase,and thus improves the corrosion resistance of the coating in HNO3 ***,the coating possessing the densest microstructure and best corrosion resistance in NaCl medium is obtained when low voltage and high frequency match with a small duty ratio.

摘要：详细介绍了一种螺旋线型μs量级高压长脉冲形成线的设计方案,率先将螺旋线的结构形式应用于μs量级高压长脉冲发生器设计。形成线的内导体为螺旋线,工作介质为去离子水,形成线的等效电容为41.25 nF,等效电感为6.06μH,特性阻抗为12.1Ω,输出脉冲宽度1μs,最高充电电压1 MV,最大储能20.6kJ,匹配状态下输出电压约500 kV。设计结果表明:与采用传统的单筒直线结构相比,在获取同等脉冲宽度的条件下,采用螺旋线结构可使脉冲形成线的长度缩短75%左右。

摘要：采用只有8引脚的PIC单片机与一线式通信的温度传感器,设计了基于载波通信的低压开关柜温度在线监测装置。通过仿真与试验验证,验证了该设计的可行性。

摘要：In power systems, the Hopf bifurcation (HB) can occur before the saddle-node bifurcation (SNB) and be-comes one of main reasons of voltage instability and collapse, so the bifurcation control for HB has impor-tant significance in improving power system voltage stability. In this paper, the numerical bifurcation analy-sis software MATCONT was used to study bifurcation behavior of a single-machine dynamic-load (SMDL) system with SVC, and the simulation analysis results show that a unstable Hopf bifurcation (UHB) point oc-curring before SNB point and engendering potential harm to voltage stability. To delay or eliminate the UHB phenomenon and enhance voltage stability of the SMDL system with SVC, we designed a sliding mode variable structure controller. The switching function and control variables of the controller are clearly de-scribed and the derivations are directly provided in detail in this paper. The MATLAB simulation results prove that the designed controller can eliminate the UHB point effectively and ensure safe and stable opera-tion of the system.

摘要：结合水厂工程的特点,介绍了电涌保护器在水厂低压配电系统中的应用,并结合国内现行的规范及国内外有关的资料文献,对SPD的安装位置等问题进行了分析说明。