So this article put forward a theory that the optimal problems can be summed up to the mathematic and computing models of state space search of optimal problems . this conclusion unifies the dijstra algorithm used in finding shortest path of traditional explicit graphs and the optimal search of implicit graphs , the search of graph and the search of graphs " tree into a common model and algorithm 本文提出了将优化问题归结为状态空间最优化搜索问题的数学模型和通用算法，将传统的在显式图中求最短路的dijstra算法与隐式图的优化搜索，隐式图搜索与隐式树搜索全部统一到同一个模型和算法中去。
Shorted rotor winding is a usual electric fault of synchronous machines . based on the analysis of fault mechanism especially the magnetic characteristics of tum - to - turn short circuit of rotor windings in turbo generator , the paper studies the diagnose method , which combines the traditional method with the intelligent method , to identify the fault and the severity 转子绕组匝间短路是一种常见的发电机电气故障，本文对其故障机理和磁动势进行了分析，将传统的方法和智能化方法相结合，对转子绕组匝间短路的存在性和故障严重性进行了诊断。
Prosprosing a tansformer winding model to judge whether the transformer has come into bing interturn short circuit and the degree of interturn short circuit , and providing an availability for condition monitoring of transformer that improves the accuracy of condition monitoring and fault diagnosis . 3 . the accuracy and invalidity of diagnosis of fault positions and fault characters of power transformer would be improved greately if reasoning and analyzing the operation records and oringnal datums of transformer 建立变压器绕组状态监测和故障诊断的模型，通过对绕组在线监测判断绕组是否发生了匝简短路、具体哪一相发生匝间短路以及匝间短路的严重程度，为变压器状态监测提供了有效的状态监测量，实现了变压器故障的局部定位，有效地提高了电力变压器故障诊断的准确性。
Gb1094 . 5 - 85 power transformers part 5 ability to withstand short circuit only applies to power transformers , not to balanced transformers . if short - circuit test on balanced transformers can be performed by means of single phase supply instead of three phase supply , and other special transformers can also be done in this way , so it is very significant to improve test capacity of transformer laboratory in our country 变压器的短路强度只能通过短路试验来验证，国家标准gb1094 . 5 - 1985 《电力变压器第5部分承受短路的能力》只适用于电力变压器，对平衡变压器等特殊变压器并无具体规定，对于平衡变压器，如果可以用单相电源预先短路法模拟三相电源的短路试验，那么其它特种变压器的短路试验也可以参照进行，这对提高我国变压器试验室的试验能力具有重要意义。
Abstract : there are only two set values ( 30 , 45 ) for interior angle of the stimulated directional power relay as the protection in phase to phase short circuit fault . an accurate setting formula for interior angle of the microprocessor - based directional power relay as the protection in phase to phase short - circuit fault is proposed and analyzed , users can set as a calculation value or at least an optimum in the formula . therefore the operation sensitivity and reliability of the directional relay would be improved greatly . the opinion is new and practical 文摘:保护相间短路的模拟式功率方向继电器内角的整定值只有两个( 30 、 45 ) ，用户只能在这两个值中选其一；分析并提出了保护相间短路的微机型功率方向继电器内角的准确整定计算公式，用户可以整定为该公式的计算值或至少为最合理的值，从而能显著提高方向继电器的动作灵敏度及可靠性，具有新见解及应用价值。
Based on the advantage of the solid - switch , many fcls with solid - state switch have been proposed . fcl with series compensation which could limit the fault current and also make compensation is more flexible and practical when compared to the others . in this paper , a type of fault current limiter with series compensation is studied 基于此，研究者提出了各种不同拓扑结构的采用固态开关的故障限流器，其中，带串联补偿的故障限流器，既具有串联补偿的功能，又能根据短路的实际情况改变限流程度，因而具有较大的灵活性和实用性。
To test the performance of the fcl , a feeder fault is simulated by matlab , results show the fcl is effective in limiting the fault current . for the low cost and convenient maintenance of scm , a laboratory set - up in which the gto pair is controlled by scm is tested 为了验证该限流器的工作性能，采用matlab仿真了馈线短路的情况下， fcl分别安装在馈线支路，发电机?主变压器支路和母线联络线处时短路电流和母线电压的变化情况，仿真结果显示，该限流器具有良好的限流效果。
