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In recent years, SiC FET power transistor and GaN high electron movability power transistor represent the third generation semiconductor-wide bandgap semiconductor power devices, have advantages of high breakdown voltage, high power density, as well as high output power, high operation efficiency, high operation frequency, wide instant aneous bandwidth, operation in high temperature environment and strong ability of resisting radiation.

近年来以SiC场效应功率晶体管和GaN高电子迁移率功率晶体管为代表的第三代半导体－宽禁带半导体功率器件具有击穿电压高、功率密度高、输出功率高、工作效率高、工作频率高、瞬时带宽宽、适合在高温环境下工作和抗辐射能力强等优点。

Therefore, this thesis raises "commercial power and DC remote power supply" which is off-line power mode of Uninterruptible Power Supply to resolve the problems of PAS CS power failure.

为此本文提出以"市电+直流远程供电"离线式UPS电源，解决小灵通基站停电问题。

For the current situations that electrical power operation environment is more complex, the power organization reformconstantly, the electricity market is formed step by step, the current electrical equipment is outdate, and for the so many problems that lowenergy efficiency, poor power quality, less interaction between customers and power grid company, this paper defines the smart grid that is suited to China's power grid situation, and summarizes five features for the smart grid such as self-healing, interactive, optimization,compatibility, integration and the differences between smart grid and traditional grid, then introduces the four systems of smart grid and two foundations before building the smart grid, and finally concludes that smart grid is the inevitable result for the economical and technological development.

针对目前电力运行环境的日趋复杂、电力体制改革的不断前进、电力市场的逐步行成、现有的电力设备亟待更新、能源利用率低、电能质量差、用户与电网公司交互作用少等诸多问题，讨论了适合中国电网情况的智能电网的定义，总结出了智能电网自愈、互动、优化、兼容、集成五大特点，概括出了智能电网和传统电网的区别，并详细介绍了构成智能电网的四大体系和建立智能电网的两大基础，最后总结出智能电网是经济和技术发展的必然结果，我国应加快智能电网的研究发展。

Let us therefore consider a master of a family with all these subordinate relations of wife, children, servants, and slaves, united under the domestic rule of a family; which, what resemblance soever it may have in its order, offices, and number too, with a little common-wealth, yet is very far from it, both in its constitution, power and end: or if it must be thought a monarchy, and the paterfamilias the absolute monarch in it, absolute monarchy will have but a very shattered and short power, when it is plain, by what has been said before, that the master of the family has a very distinct and differently limited power, both as to time and extent, over those several persons that are in it; for excepting the slave (and the family is as much a family, and his power as paterfamilias as great, whether there be any slaves in his family or no) he has no legislative power of life and death over any of them, and none too but what a mistress of a family may have as well as he.

所以，让我们在家庭规则之下来考虑家庭的主人与所有妻子，孩子，仆人和奴隶的从属关系；家庭，无论在它的秩序，各种职务以及人数方面多么的类似于一个小国家，然而在它的构造，权力和目的方面与国家是相去甚远的：或者如果一定要把它想成一个君主国，家长是绝对君主的话，这个绝对君主国也仅仅拥有零碎和短暂的权力，因为根据前面的论述，很明显：家庭主人对其余人的有限权力，无论在时间上还是在范围上与君主的权力都是截然不同的；因为除了奴隶，他没有对任何人的生命和死亡拥有立法的权力，女主人也同样没有。

The voltage and the sensitivity of voltage to system operation parameters are calculated by Newton power flow approach; the various higher order derivatives of voltage and voltage sensitivity to line openbreak parameter can be obtained by using the convergent correction equation of power flow and the equation of calculating sensitivity for the N power system. Finally, the voltage and sensitivity of N-1 power system can he calculated by correcting the voltage and sensitivity of N power system by Taylor series expansion.

通过牛顿潮流计算出N网络的各节点电压及其对系统运行参数的灵敏度；利用已收敛的潮流修正方程式和N网络灵敏度计算方程式分别对线路开断参数多阶求导，从而计算出电压和灵敏度对此线路开断参数的多阶导数值；根据泰勒级数展开式修正N网络的电压和灵敏度值，得到N-1网络的电压和灵敏度值。

In the design of the power supply, the main circuit topology frame uses half-bridge series resonant switching and parallel load connection, in which, an IGBT is adopted as the power switches, and features high operation frequency, high output power and fast response. In addition, the IGBT in the switch mode power supply has no hard turn-on or turn –off situation in transition, thus the disturbance to the power system is avoided.

相应的激光电源采用半桥软开关技术，串联谐振并联输出，IGBT 为主控制元件，实现了高频工作、高功率多路输出，响应快速；脉冲模式工作时避免了开关管的硬开关，减小了高次谐波对电网的干扰；无需镇流电阻也可实现气体稳定放电等特性。

In the design of the power supply, the main circuit topology frame uses full-bridge series resonant switching and parallel load connection, in which, four MOSFETs are adopted as the power switches, and by four pulses which UC3879 produces, high frequency operation and fast response are realized. In addition, the MOSFET in the switching power supply has no hard turn-on or turn-off situation in transition, thus the disturbance to the power system is avoided. Especially,by the use of high frequency transformer, PQ50/50, the switching power system can provide the steady discharge current without any amperite.

此开关电源采用全桥软开关技术、串联谐振并联输出，四个MOSFET管为主控制开关元件，通过脉冲产生电路UC3879产生的四路相关脉冲实现了高频交替开关，同时能快速响应输出的各种变化；避免了开关管的硬开关，提高了转换效率，另外通过采用高频变压器PQ50/50隔离了原副边，减小了高次谐波对电网干扰；无需镇流电阻也可实现气体稳定放电。

The instantaneous power theory was employed to analyze the instantaneous power of the control winding and the control scheme for the DWIG system with diode bridge load was obtained. The component of the currents on the control-winding flux determines the instantaneous reactive power, and the component on the perpendicular direction of the flux decides the reactive power. The former one influences the DC voltage of the diode bridge on power winding and the latter one influences the DC voltage of the static excitation controller of control windings.

基于瞬时功率理论，推导出按控制绕组磁场定向时控制绕组的瞬时功率，在此基础上分析了带整流桥负载的定子双绕组感应电机发电系统在宽转速运行时的电压调节机理，即：控制绕组电流在控制绕组磁场及其法线上的分量，分别决定着发电系统功率绕组整流桥直流侧电压和控制绕组静止励磁控制器(static excitation controller，SEC)直流侧电压，据此提出宽转速运行时DWIG发电系统电压控制策略。

After the intermediate stage in the Medieval Europe, the deed theories of Hebrew culture was not only enormously promoted the economic development , with contracting freedom inherited from the ancient Rome culture, Moreover, it had expedited the people sovereignty theories. After the combination of the neoteric commodity economy with the theories of Christianity\'s original sin, belief doctrine, and the wealth view, which gave birth to the supreme status of constitution, and the conception of equality, freedom, and so on. Christianity\'s wealth view (especially the Protestantism ethics) enormously promoted the capitalism expansion and finally forms the conception that private property are sacrosanctity. The ideology of successive authority restriction from Christianity, and the Christianity\'s exercise to partial legislative power and jurisdiction power, combined with autonomous cities based on commodity economy, and the political phenomenon that merchants exerted legislative power and jurisdiction power. Those had made the mundane ruler such as king, and so on, could only take the exertion of tax revenue power as the main symbol administrative authorities. It provided historical and psychological foundation for the birth of modern decentralization theories .

希伯来文化中的"约"和古罗马的契约自由不仅极大地促进中世纪中期以后欧洲商品经济的发展，而且催生了人民主权理念；基督教的"原罪说"、信仰主义和财富观等与近代商品经济的结合，生成了宪法至上及平等、自由等权利观念；基督教的财富观极大地促进了资本主义扩大再生产的实现并最终形成私有财产神圣不可侵犯的财产权观念；基督教会传承的权力制约思想及基督教会对部分立法权和司法权的行使，与建立在商品经济基础上的自治城市及商人行使立法权、司法权等政治现象相耦合，使得国王等世俗的统治者习惯于只行使以税收权为主要标志的行政权，为近代分权学说的产生和分权制度的建立提供了历史和心理的基础。

After the intermediate stage in the Medieval Europe, the deed theories of Hebrew culture was not only enormously promoted the economic development , with contracting freedom inherited from the ancient Rome culture, Moreover, it had expedited the people sovereignty theories. After the combination of the neoteric commodity economy with the theories of Christianity"s original sin, belief doctrine, and the wealth view, which gave birth to the supreme status of constitution, and the conception of equality, freedom, and so on. Christianity"s wealth view (especially the Protestantism ethics) enormously promoted the capitalism expansion and finally forms the conception that private property are sacrosanctity. The ideology of successive authority restriction from Christianity, and the Christianitys exercise to partial legislative power and jurisdiction power, combined with autonomous cities based on commodity economy, and the political phenomenon that merchants exerted legislative power and jurisdiction power. Those had made the mundane ruler such as king, and so on, could only take the exertion of tax revenue power as the main symbol administrative authorities. It provided historical and psychological foundation for the birth of modern decentralization theories .

希伯来文化中的"约"和古罗马的契约自由不仅极大地促进中世纪中期以后欧洲商品经济的发展，而且催生了人民主权理念；基督教的"原罪说"、信仰主义和财富观等与近代商品经济的结合，生成了宪法至上及平等、自由等权利观念；基督教的财富观极大地促进了资本主义扩大再生产的实现并最终形成私有财产神圣不可侵犯的财产权观念；基督教会传承的权力制约思想及基督教会对部分立法权和司法权的行使，与建立在商品经济基础上的自治城市及商人行使立法权、司法权等政治现象相耦合，使得国王等世俗的统治者习惯于只行使以税收权为主要标志的行政权，为近代分权学说的产生和分权制度的建立提供了历史和心理的基础。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。