故障

Under the circumstance of simple fault on double circuit transmission lines, the positive-sequence impedance is equal to the negative-sequence impedance, and the positive fault component current is equal to or greater than the negative circuit.

文中通过对线路发生简单故障与跨线故障情况下的正、负序故障分量阻抗关系和正、负序故障分量电流幅值关系的分析，提出了一种判别电力系统发生跨线故障的判别元件。

In the paper, the importance of FTA is described, the quantitative analysis method of the FTA is introduced in detail. Then the paper takes a vehicle control system as the research object, expatiates the forming of the CPU board fault tree, the establishing of the mean event fault tree and the obtaining of the mean event fault probability, and realizes the element level fault orientation on the CPU board of the vehicle control system. The test indicates that the method is both valid and correct.

文章在介绍故障树分析法重要性的基础上，较详细地介绍了FTA的定量分析法，并以某车辆控制系统为研究对象，从CPU板故障树的构建、各中间事件故障树的建立和各子事件故障概率等方面出发，实现了车辆控制系统CPU板元件级的故障定位，实验表明了该方法的有效性和正确性。

Optimal design of the incidence matrix for structured residual approach with maximized sensitivity is discussed in this paper, in order to overcome the shortcoming of SRAMS that ignores the speed and sensitivity of fault diagnosis while considering the isolability of fault codes in the incidence matrix design.

针对基于具有最大敏感性结构化残差的传感器故障检测与诊断方法在设计影响矩阵时只考虑故障编码的可分离性，而没有考虑故障诊断的快速性和灵敏性的缺点，给出了故障敏感度和故障诊断灵敏度等指标，并提出了两种影响矩阵的优化设计算法。

Furthermore, this model is expanded in two aspects: on the one hand, through the introduction of the theory of the Fault Tree, this thesis analyzes the difference between the fault-diagnosis in the recovering flow and that in the traditional flow, thus concluding that the fault-diagnosis in the recovering flow is just a tracing-back process of the directed-graph and the Fault Tree; on the other hand, a finite self-restoring state machine is constructed on the directed-graph model, thus providing the theoretical basis for the realization of the auto-recovery model.

随后在两个方面对该模型进行了扩展：1。通过引入故障树的方法，并在分析了恢复流程故障诊断与传统故障诊断的差异之后，总结出恢复流程的故障诊断就是一个基于有向图和故障树进行回溯的过程；2。基于有向图模型建立了一个有穷自动状态机，为自动恢复与模型的实现提供了理论基础。

The practicality of using rough set to reduce the date was discussed, in this paper, and the interval-valued continuous attribute discretization by applying self-organizing map neural network clustering was proposed, too. This article proposes a simplified indiscernible matrix's method, which reduces the example's condition attribute and eliminates the redundant information of the date. What's more, it provides the methods used to diagnosis compressor's faults based on the intelligence hybrid system by adopting the MATLAB neural network workbox. At last, the functional modules which make up into intelligence hybrid system for fault diagnosis was introduced, including: data acquisition module, date preprocessor module, date reduction module, neural network module, fault diagnosis module and fault expressing module. Here, the article also gives the flow of work of all the above modules.

论文论述了应用粗集对故障数据进行约简的可行性，并应用自组织映射神经网络的聚类功能，来实现连续属性值的离散化方法；给出了简化的分明矩阵法，并用该方法实现了样本条件属性的约简，消除了样本数据中的冗余信息；采用MATLAB神经网络工具箱建立了压缩机的部分故障类型的智能混合诊断系统；最后介绍了智能混合故障诊断系统的功能模块组成，各功能模块分别为：数据采集模块，数据预处理模块，数据约简模块，神经网络模块，故障诊断模块，故障解释模块；并给出了各功能模块的工作流程。

Nextly, develop a fault diagnosis data collecting system which solved real-time dataacquisition in the power system fault diagnosis, the data message is analysed in detail andextract the data required in fault diagnosis, this system can not only collect data but alsotransmit the data information to attemper and provide a necessary condition for electric powersystem fault diagnosis On-line.

其次，开发电力系统故障诊断数据信息采集系统，该系统解决了电力系统故障诊断过程中故障特征信息很难实时获取的问题，同时对数据报文进行了详细的分析，提取出故障特征信息，该系统不但可以采集数据，而且还可以将数据信息实时传送至调度，为电力系统大规模在线故障诊断提供了必要的条件。

Firstly-the values of voltage on various test points under normal.states and fault states are measured;and the deviation of voltage is fuzzed for deriving the membership degree of the deviation under different fault states.Then.with the membership degree of each test points and their relevant fault categories 88 the sample for training neural network to establish non.linear function from fault feature to fault categories.

首先测得模拟电路在故障状态和正常状态时各测试节点的电压值，并对其电压偏差值模糊化，从而求得不同故障状态下各测试节点的电压偏差值所对应的隶属度；其次，以各测试节点的隶属度和所对应的故障类型作为训练神经网络的样本，来建立从故障特征到故障类型的非线性函数；最后。

This paper starts with the different characteristic between simple line fault and cross country fault ,new method for identifying simple fault and cross country fault is put forward.

从同杆并架并架双回线跨线故障和单回线故障的不同电气特征出发，分析了现有的主要选相元件在同杆并架线路发生跨线故障时所存在的问题，提出了基于跨线故障识别的同杆并架双回线故障选相的新方案。

In this thesis, the method of combining neural network with Expert System has been used for fault diagnosis in ore grinding firstly, while wavelet analysis is also used for signal process. Ore Grinding Intelligent Fault Diagnosis Consult System is developed.

本文根据磨矿生产过程中的故障特点，首次将人工神经网络与专家系统相结合的思想和方法运用于磨矿生产过程中的故障诊断和故障处理咨询，并把小波分析技术应用于信号的处理，并开发了磨矿智能故障诊断咨询系统，发展了磨矿系统的故障诊断理论。

Transmission network"s fault affects power system"s safe and reliable operation directly. Accurate judgement of fault locality and fault type can shorten the time in disposing fault, realize the power supplys quick resumption and lessen the economic losses because of fault.

输电网络故障直接影响电力系统的安全稳定运行，准确的故障区域、故障类型的判断能缩短故障处理的时间，实现故障后的快速恢复供电，减少因停电造成的经济损失。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。