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After analyzing the working character of the transformer in details and absorbing the advantages in other power transformer protection, a scheme which is fit to power transformer of 35kV or below voltage ratings is put forward.

根据这一类电力变压器的运行特点，吸取以往各种保护方法的长处，提出了一套适合于35kV及以下电压等级的电力变压器保护方案。

In order to improve the power quality of distribution network system, one of the most effective methods is reactive power compensation. In this paper, the Distribution Static Synchronous Compensator for reactive power compensation was studied, and then the digital controller based on One-cycle control was designed. The waveforms of experimental device based on DSTATCOM of one-cycle control were given in this paper. It can be seen from the results that the fluctuation of DC capacitor voltage is lower, the dynamic response speed of DSTATCOM providing or absorbing reactive power is fast, and the accuracy of steady-state compensation can achieve the requirements of reactive power compensation in engineering basically

为了提高配电网系统的电能质量，对无功功率进行精确补偿是非常有效的方法之一；本文研究了配电网静止同步补偿器用于无功补偿，并设计了单周控制的数字控制器；文中给出了基于单周控制的DSTATCOM无功补偿试验装置工作过程中的波形曲线，从试验结果可见，本文设计的单周控制DSTATCOM无功补偿装置的直流侧电容电压在工作过程中波动较小，装置发出或者吸收无功功率的动态响应速度较快，稳态补偿精度基本能够达到工程中无功补偿的要求。

Minimum of 3 years direct experience with low voltage lectrical distribution products - MCCB's or ACB's.

至少具有三年在一线从事低压电气-塑壳断路器或空气断路器的产品设计的经验。

Moreover, as Q〓 had close relation with voltage step-up ratio and working stability of piezoelectric transformer, improving Q〓 was essential, which could be realized with acceptor doping or Pb O〓, Pb O〓 addition.

另外，添加PbO〓、PbO〓这类大功率组元也可以大幅度提升Q〓。

In this paper the acid number and breakdown voltage of transformer oil are tested.

加速氧化会使变压器油酸值增加，对变压器油的酸值和击穿电压进行了测定。

This product mainly applies for transmission line of high voltage for river-crossing or lake-crossing upon requirements of acidproof or alkaliproof.

主要适用于过河、过湖等有防酸、碱要求的高压输变电工程。

The strength, acidproof and basicproof stability, conductivity and performance of isolating high-voltage electric field of the joint were investigated in detail.

本文采用激光烧蚀、HF腐蚀和阴离子膜封堵的方法制作了一高压电场隔离接口，并对该接口的强度、耐酸碱稳定性、导电率及隔离电场性能等进行了详细研究，结果表明采用激光烧蚀、HF腐蚀和阴离子膜封堵的方法制作的高压电场隔离接口性能优良，有一定潜在的商业价值，可望推广应用。

This thesis compares the characteristics of secondary batteries used for the underwater system in order to find a proper power source that is suitable for the system. Moreover, the low-cost integrated circuit and buck-type converters are used to obtain the required voltage levels for the devices in the system such as the underwater acoustic modem, single board computer and vertical line array hydrophone with condition amplifiers.

中文摘要本文针对常用於水下遥测系统之二次电池进行特性比较，以选用适合作为其电源之电池，再将电池输出电压经低成本之类比IC与降压型转换器转换至符合本系统设备如水下数据声传器、水下遥测单版电脑与垂直阵列麦克风讯号放大器等所需之电压等级。

By analyzing, the fault transient component of third harmonic voltage at neutral is approximately equal to that at terminal. Choosing their sum and difference as the action and restrai nt signal respectively, the protection detects the ground fault by comparing the spectrum energy of action and restraint signals.

该保护方案根据单相接地故障后机端和中性点 3次谐波电压的故障暂态分量近似相同的特点，把两个故障分量的相量和与相量差分别作为保护动作信号及制动信号，通过比较数据窗内相应信号的谱能量检测定子单相接地故障。

The STS2320 SCSI Terminator, which is fully compliant with these standards, enables the designer to gain the benefits of active termination: greater immunity to voltage drops on the TERMPWR line, enhanced high-level noise immunity, intrinsic TERMPWR decoupling, and very low quiescent current consumption.

该STS2320的SCSI终结者，这是完全符合这些标准的兼容，使设计人员争取主动终止优点：更大的豁免权，以电压的TERMPWR线加强高层次噪声免疫力，内在TERMPWR解耦，并滴非常低的静态电流消耗。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。