变比

本文通过利用Boost直流斩波电路替代传统拓扑中的Buck电路，解决了变压器高变比以及倍压整流电路多级化的问题。

By using a Boost DC chopper circuit to replace the traditional topology of Buck circuit ; this article solved the problems of high transformation ratio of transformers and multipolarity of voltage multiplying rectifying circuit .

电流互感器变比的合理选择保护用电流互感器变比选择和稳态校验

Selection of transformation ratio and steady state verification of CT for relay Choice

线路电流差动保护自适应CT变比的方法

A method of CT ratio self-adaptation of line differential protection

短路试验法测变压器间隔CT变比和极性

Short-circuit testing method to check the ratio and polarity of transformer compartment CT

CT变比和极性的测定是变压器保护检验工作的重要组成部分。

Ratio and polarity test of CT is the important work in the inspection of transformer protection .

基于对称分量法的高计用户TA变比在线准确测量原理与实现

Principle and Realization of Online Accurate Measuring for TA Ratio of HV Measuring Based on Symmetrical Component Method

文章分析了二次绕组带有抽头的套管电流互感器（CT），其二次端子接线错误对CT变比的影响。

The paper analyses the current transformer ( CT ) that secondary winding possesses casing tap , and its secondary connector wiring fault 's influence on the CT changing rate .

针对Z型变压器的特点，介绍了Z型变压器的绕组变比测试方法及零序阻抗测试方法。

The paper aiming at the characteristic , introduces the methods of the winding ratio test and the zero-sequence impedance test of the type of Z transformer .

跃变比判别热解Si-C-N陶瓷EELS定量分析的有效性

Using jump-ratio method to validate quantitative EELS analysis in precursor-derived Si-C-N ceramics

谐振参数可用推荐的方法依照变比n、谐振电容Cs、谐振电感Ls、谐振电感Lm的次序来设计。

Resonant parameters can be designed in sequence of turn ratio n , resonant capacitance Cs , resonant inductance Ls , and resonant inductance Lm by the proposed method .

其内容包括并联电感Lp及变压器初级电容Cp的计算、变压器变比及其最大占空比的确定。

The contents include calculation for parallel connection inductance LP and the primary capacitance of main transformer , no-load voltage ratio and maximum duty ratio of the transformer .

在此无功补偿模型中，除了考虑变压器变比、补偿电容、发电机端电压之外，控制变量采用TCSC的输出变量。

In this reactive compensation model , besides considering transformer , compensation capacitor , generator bus voltages outside , The control variables using TCSC output variables .

本文首先采用含有有功功率P、电压U和负荷阻抗角φ的三元分析法研究OLTC变比变化对静态电压稳定性的影响。

Firstly , this article studies the influence of OLTC transformer ratio change on static voltage stability by using the ternary analytical method of voltage U , power P and load impedance angle φ .

通过测量用户低压侧三相电流相量，通过特定的算法处理，准确判定用户高计TA的实际变比是否与铭牌一致。

Through measuring three-phase current of low voltage at user side and handling by specific algorithm , TA ratio of HV measuring can be accurately judged whether is consistent with data plate .

另外对有载调压变压器变比改变时，TA二次侧电流与抽头位置的关系作出研究，提出自动识别变比的电流校正原理，通过在线调整的方式对TA二次侧电流作自适应校正。

A kind of TA currents correction method based on the analysis between TA secondary sides current and taps position is introduced , which can adjust TA secondary side currents online automatically .

CT变比控制单元，采用传感线圈检测CT次级电流，并通过另一迟滞比较器控制继电器，实现CT变比切换，使CT次级电流始终保持在预先设定的范围内。

In the CT ratio control unit , the sensor coil is used to detect the second current of CT , and the relay is controlled by another hysteresis comparator to realize the CT ratio transformation and keep the CT second current in the prearranged range .

级联式BDC具有：两部分可分别优化设计、功率密度高、适于大变比变换的应用等优点。

The two-stage BDC has the advantages of ZVS switching , high power density , convenient to optimum design and convenient to modularize .

在这种算法中，其雅可比矩阵包含了OLTC变比的相关信息，因此用其进行系统电压稳定的静态分析更能反映系统的真实状况。

In this method the Jacobi Matrix have the factor of OLTC 's rate , so using it to analyze voltage stability is better .

同时对直流电容取值及耦合变压器电抗和变比对SSSC特性的影响进行了初步分析。

The influence of the value of DC capacitor and reactance and turn ratio of coupling transformer on the characteristics of SSSC is preliminarily analyzed .

本文以某实际电网的典型运行方式为基础，计算了特征值对系统运行参数及网络参数的灵敏度，分析了发电机出力、PV电压、线路阻抗、变压器变比等对系统小干扰稳定性的影响。

Based on the typical operating mode of a practical system , eigenvalue sensitivities with respect to system operating parameters and network parameters are computed . Effects of generator powers , PV voltages , line impedances , transformer taps on the system small signal stability are studied .

年平均气温、季平均气温变化存在以1985年为跃变点，这次跃变比全国晚5~7a，比西北地区提前1a。

The average yearly and quarterly temperature has an obvious interdecadal climate jump and the jump point happened in 1985,5 ~ 7 years later than the jump point in China and 1 year later than the jump point in the Northwest region .

装置具有对TA的变比极性、二次负载及10%误差曲线和伏安特性曲线等自动测试的功能，能够实时显示测试过程及结果数据，现场打印测试数据和特性曲线图。

The tester can automatically test the transformation ratio-polarity of the protection CT , secondary load , 10 % error curve , volt-ampere characteristic curve and so on , real-timely display the test procedures and data result , and print the test data and characteristic curves at site .

计及感应电动机的励磁电抗，导出了负荷最大功率的表达式，在有载调压变压器（OLTC）变比的正常调节范围内得到了负荷最大功率的不同变化趋势。

The expression of the maximum load power is deduced as well as its changing trend under normal regulating range of on-load tap changer ( OLTC ) ratio with the excitation reactance of induction motor considered .

研究表明，计及感应电动机励磁电抗的影响，在OLTC变比的正常调节范围内，负荷的最大功率存在着单调增加、先增加后减小和单调减小三种可能的变化趋势。

Considering the excitation reactance of induction motors , three different changing trends of power transfer limit are found in the normal regulating range of OLTC . They are monotonic increase , monotonic decrease and decrease after increase , respectively .

其次，本文还考虑到电力系统接入分散电源的情况下，分别采用P-U曲线、Q-U曲线法和三元分析法研究OLTC变比调整对接入分散电源系统静态电压稳定性的影响。

Secondly , considering the case of power system connected distributed generation , the influence of OLTC adjustment on static voltage stability adjustment is researched by using the methods of P-U and Q-U curves and method of ternary analytical .

基于变比变化检测的变压器抽头位置跟踪估计算法

Transformer Tap Position Tracing Estimation Based on Turn Ratio Changing Detection

改进的变比热正冲波解析解

An improved analytical solution of varying specific heat normal shock waves

一种新型的变比热气动函数

A new type of gas dynamics function with variable specific heat

电流互感器变比测量方法的研究

Research on Measuring Methods for Transformation Ratio of Current Transformer

一种确定变压器变比和联结组别的新方法

A New Method of Determining Vector Ratio and Connection Set of Transformers