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Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

On a new, blank line, type 300 and hit Enter. Type 200, hit Enter.

一种新的空白行，键入300和回车键输入200 ，回车键。

However, if I have to imagine this竖着enter text, we must enter the word, and every time when entering a carriage return.

不过，如果要想像笔者这样竖着输入文字，一定要单字输入，而且每输入一个按一次回车。

After every regular bus sends a car, the check ticket record that passenger station gives the unit that enter camp is the primitive evidence that the unit that enter camp uses settle accounts carriage, every order a piece, undertake by primitive credential and passenger station settle accounts; returns some units that enter camp to have close an account every months with passenger station by passenger counterfoil every months.

每辆班车发车后，客运站给参营单位的检票记录是参营单位用来结算运费的原始凭据，每班次一张，每月凭原始凭据与客运站进行结算；还有的参营单位凭旅客票根同客运站进行每月结算。

Enter for 报名参加 enter for a race 参加赛跑Every year I enter for the garden competition too, and I always win a little prize for the worst garden in the town!

""每年我也报名参加花园大赛，但我总是得全镇最差花园的小奖！

To change the current cutting speed can press the Enter key, so that the current speed of display brightness, enter a new speed value, and then press the Enter key to accept the input speed controller.

按下"回到路径"键，切割机将将回到原路径的点上，这个功能对检查或替换设备的部件时非常有用。

Choi to pay a deposit of 20,000 yuan with nature, in order to enter into a contract for the sale of real estate secured, it is both the commercial and residential housing can have a disagreement which led to failure to enter into a contract for the sale of commercial housing , and the subscription book, there is no clear agreement on this issue, it failed to enter into a contract for the sale of commercial housing is not attributable to the reasons for the parties, the two sides do not exist at fault, the deposit does not apply penalties, the plaintiff to pay the deposit should be returned.

经审理，法院认为崔某交一定的押金20000元，性质，以签订合同的销售不动产担保，这是双方的商业和住宅可以有分歧，而导致未能进入销售合同的商业住房，认购书，但没有明确就这一问题达成协议，但未能进入销售合同的商业住房不归于的原因，各方，双方不存在过错，存款不适用刑罚，原告支付定金应退还。

To change the current cutting speed can press the Enter key, so that the current speed of display brightness, enter a new speed value, and then press the Enter key to accept the input speed controller.

按下&回到路径&键，切割机将将回到原路径的点上，这个功能对检查或替换设备的部件时非常有用。

Union Bank of Switzerland, the Group trades choice is the basic principle : access to their own comparative advantages operational areas, giving up a comparative disadvantage in business; Enter the uncertain business outlook, abandon the uncertain future operations; Enter a complementary business to business, business to abandon overlapping operations; Enter the high profits However, stable business, may abandon high-yield but certainly high risk business; expanded agency business, the self-reduction operations; in business and private businesses choosing to focus on the development of private business.

瑞士联合银行集团行业取舍的基本原则是：进入自身有比较优势的业务领域，放弃自身有比较劣势的业务；进入前景明朗的业务，放弃前景不明的业务；进入业务互补的业务，放弃业务重叠的业务；进入利润不高但收益稳定的业务，放弃可能高收益但肯定高风险的业务；扩大代理业务，减少自营业务；在公司业务和私人业务的选择中，重点发展私人业务。

Fault Analysis and Treatment: An estimated following reasons: 1 self-completion computer emerged in the interface when activated by pressing the reset button, will appear in the start menu option to start, and the default choice is the safe mode, if the Press key, the system will enter the safe mode, restart the computer only needs to enter to the normal mode; 2 The system file is damaged or subjected to virus infection, resulting in Windows98 operating system can not enter into normal mode, can only enter the Safe Mode.

故障分析与处理：估计有以下几种原因：1）电脑在自检完成出现启动界面的时候按下了复位键，在启动时会出现启动菜单选项，并且默认选择的是安全模式，如果此时按键，系统便会进入安全模式，只需要重新启动电脑即可进入到正常模式；2）系统文件被破坏或遭受病毒感染，造成Windows98操作系统不能进入到正常模式，只能进入安全模式。

Graf, without question, is the greatest women's player in history.

格拉芙，现在，毫无疑问是女子网坛历史上最伟大的选手。

If not, you will have to look around at all your important data.

如果没有，您将需要检查所有的重要数据。