Description: 仪器内部具有多变比的自升压电压互感器标准，准确度等级达到0.02级，可以在1200V和2400V的电压下准确检定电力电压互感器的误差。-I do school-based low-F206 main high-voltage transformer has been used in products. Platform: |
Size: 6144 |
Author:王勇 |
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Description: 采用STC89C52单片机作为系统的核心控制器件，利用定时中断，对任务设计了不同的响应频度，CPU分别执行各任务。用这种任务抢占思想构建的程序框架，实现各模块功能，实现了电压可控的恒定直流稳压电源设计。采用10位的AD1543和 DA5615，实现高精度输出与测量；通过闭环控制，使输出电压稳定；显示模块采用了WM-C1602N液晶显示模块，人机界面友好。该系统采用市电变压供电，由单片机控制模块、AD转换模块、DA转换模块、稳压电路、键盘输入模块与显示模块组成，具有高精确输出直流电压功能，测量精度高、抗干扰能力强等特点。-STC89C52 system used as the core of single-chip microcomputer control devices, the use of regular interruption of tasks designed to respond to different frequency, CPU implementation of the tasks, respectively. This task to build process to seize the ideological framework for the realization of the modules to achieve a controllable constant voltage DC power supply design. 10-bit AD1543 and DA5615, to achieve high-precision measurement of output through closed-loop control, so that the output voltage stability display module using the WM-C1602N liquid crystal display module, a friendly man-machine interface. The system uses a municipal electric transformer power supply, by the single-chip control module, AD converter, DA converter, voltage regulator circuits, the keyboard input module and display module with high-precision DC voltage output function, high precision measurement, features such as anti-interference ability. Platform: |
Size: 67584 |
Author:john |
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Description: 简单潮流计算的小程序，相关的原始数据数据数据输入格式如下： B1是支路参数矩阵，第一列和第二列是节点编号。节点编号由小到大编写 对于含有变压器的支路，第一列为低压侧节点编号，第二列为高压侧节点 编号，将变压器的串联阻抗置于低压侧处理。 第三列为支路的串列阻抗参数。 第四列为支路的对地导纳参数。 第五烈为含变压器支路的变压器的变比 - Simple little program flow calculation, the raw data of the data related to data entry format is as follows: B1 is the slip parameter matrix, the first column and second column is the node number. Node number from small to big with the transformer for the preparation of slip, the first as the low pressure side of the node number, the second as a high-pressure side of the node number, the series impedance of the transformer low voltage side of the deal placed. As the third branch of the serial impedance parameters. Fourth as a slip of the ground admittance parameters. Strong as with the fifth branch of the transformer transformer turns ratio Platform: |
Size: 8192 |
Author:zy |
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Description: 开关电源变压器磁芯多是在低磁场下使用的软磁材料，它有较高磁导率，低的矫顽力，高的电阻率。磁导率高，在一定线圈匝数时，通过不大的激磁电流就能承受较高的外加电压，因此，在输出一定功率要求下，可减轻磁芯体积。-Switching power transformer cores are mostly used in low magnetic field of soft magnetic materials, it has a higher permeability, low coercivity, high resistivity. Permeability rate, a certain number of turns, through the small magnetizing current can withstand high voltage, therefore, a certain power in the output request, reduce the volume of the core. Platform: |
Size: 8192 |
Author:lizimu |
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Description: 优秀论文及配套源码。电压暂降是动态电能质量问题中最受关注的热点之一。大量新型电力电子设备的广泛使用对电网电能质量的要求越来越高，而且电压暂降在电网中又具有一定的传播性。因此，无论从电网还是用户都迫切需要对电压暂降进行研究和治理。对电压暂降的检测是解决电压暂降的前提条件，故本论文主要对电压暂降的检测方法进行研究。
本文分析了国内外短时电能质量扰动检测的研究现状，并着重讨论了短路故障、感应电动机启动和变压器激磁三种电压暂降扰动情况下电压暂降的特性；在此基础上选择了基于S变换的短时电能质量扰动检测方法，从S变换的结果S模矩阵及S复矩阵中提取出所需数据并以此来对各种扰动情况下的电压暂降的幅值、相位跳变、持续时间和谐波含量进行分析。仿真结果表明，该方法很好地实现了对电压暂降各特征量的检测。
-The voltage sag is one of most hot topics in dynamic electric energy problems. Masses of new power and electron facilities have been put into use widely, requiring a high quality of electric network and power, chiefly the voltage sag. Moreover, the voltage sag can spread in the electric network. So people have every reason to research and control the voltage sag. However, before developing the voltage sag, people have to detect it. On account of the above, this essay will chiefly focus on the detect methods of the voltage sags.
In this paper, the status of the short duration power quality disturbance based on the different method are researched firstly, and emphasizes the characteristic of the voltage sag under the situation of the three kinds of voltage sag disturbances like the short circuit fault, induction motor start-up and transformer excitation. On the basis of the above, the short duration power quality disturbance detection method based on S transform is chosen. The complex m Platform: |
Size: 541696 |
Author:NBB |
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Description: The CS5460A is a highly integrated power measurement
solution which combines two
Analog-to-digital Converters (ADCs), high-speed
power calculation functions, and a serial interface
on a single chip. It is designed to accurately measure
and calculate: Real (True) Energy,
Instantaneous Power, IRMS, and VRMS for single
phase 2- or 3-wire power metering applications.
The CS5460A interfaces to a low-cost shunt resistor
or transformer to measure current, and to a
resistive divider or potential transformer to measure
voltage. The CS5460A features a
bi-directional serial interface for communication
with a microcontroller and a pulse output engine for
which the average pulse frequency is proportional
to the real power. Platform: |
Size: 6144 |
Author:shriram_26 |
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Description: 北京四方立德保护控制设备有限公司变压器高压侧后备保护说明书-Fourth Beijing SiFang Leader protection and control equipment Co., the high voltage side of the transformer backup protection manual Platform: |
Size: 558080 |
Author:高利 |
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Description: Solid-state switch mode AC-DC converters having
high-frequency transformer isolation are developed in buck, boost,
and buck-boost configurations with improved power quality in
terms of reduced total harmonic distortion (THD) of input current,
power-factor correction (PFC) at AC mains and precisely
regulated and isolated DC output voltage feeding to loads from few
Watts to several kW. This paper presents a comprehensive study
on state of art of power factor corrected single-phase AC-DC converters
configurations, control strategies, selection of components
and design considerations, performance evaluation, power quality
considerations, selection criteria a Platform: |
Size: 1656832 |
Author:sajitsanit |
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Description: X射线机控制源代码主要对高频微焦点牙科X线机的高频逆变技术、高频变压以及灯丝电路控制原理进行了编写研究。通过程序代码对于管电压以及管电流的控制，采用脉冲宽度调节方式（PWM）实现输出电压和功率的调节。X射线机控制程序通过硬件电路的AD采样经直流逆变、高频变压器、倍压整流形成数字电路经计算机编译得到单片机能够识别的二进制代码来控制机器，其成像极为清晰并且球管发射出的软射线得到了很好的抑制，降低了漏射线量，提高了成像效率，使常规X射线机的结构形状多样化，具有体积小、重量轻、低辐射（其辐射量、漏射线量仅为国家规定的百分之一），便于放置等特点。X射线机控制程序主要适用口腔门诊治疗前的检查，治疗过程中的效果对比，及治疗后的效果确定，对种植牙、根管治疗或微创手术患者带来极大的方便，是口腔门诊中不可或缺的软硬件设备。-X-ray machine control source code control principle of high-frequency inverter technology for high-frequency micro-focus dental X-ray machine, high frequency transformer, and filament circuit of the preparation of the study. By the program code for the tube voltage and tube current control, pulse width modulation (PWM) and to achieve the adjustment of the output voltage and power. AD sampling of the X-ray machine control program through the hardware circuit DC inverter, high frequency transformers, voltage doubler rectifier digital circuit is formed by the computer compiles the microcontroller can identify binary code to control the machine, its very clear imaging and bulb emits soft rays inhibition, reducing the amount of radiation leakage and improved imaging efficiency, diversification of structure and shape of the conventional X-ray machine, a small size, light weight, low-emissivity (radiation, radiation leakage was only one percent of the state regulations), easy to place charact Platform: |
Size: 59392 |
Author:sam |
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Description: Prediction of thermal ageing in transformer oil and high voltage PVC cables using artificial neural Networks Platform: |
Size: 390144 |
Author:saad |
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Description: 随着电力系统的发展，电网的容量，电压等级不断提高，大型高压变压器作为电能传送的枢纽，它的安全运行与否，直接关系到电力系统能否连续稳定地工作。特别是由于大型变压器结构复杂、造价昂贵，一旦发生严重故障而损坏，将给维修工作带来很大困难，造成经济上的重大损失。微机继电保护系统作为一种能反映电力系统故障和不正常状态、及时动作于断路器跳闸或发出信号的自动化设备能自动、迅速和有选择地切除故障组件，使系统免遭损坏。因此对于研制开发性能优良的变压器微机保护装置具有十分重要的现实意义。
本论文在现有的变压器主、后备保护原理和配置方案的研究基础上，设计了一种保护配置方案；利用谐波比率差动、瓦斯保护配以电流保护、过负荷保护等，形成了变压器保护的综合方案；该方案具有较高的速动性、灵敏性、可靠性、抗干扰等性能。论文介绍了装置的硬件结构和软件设计，硬件上采用基于高性能的ARM系列AT91M55800A芯片作为硬件平台，软件上采用模块化编程的方法，该设计方案可以更好的满足设计要求。
关键字：变压器保护，微机保护，AT91M55800A
-With the development of power systems, power grid capacity and voltage level are rising.large-scale high-voltage transformer is the power transmission hub, and its safe operation is directly related to the continuous and stable electric power systems which could work or not. In particular, a large transformer structure as complex and expensive machine is damaged, maintenance work will bring much difficulty, causing economic losses. Computer Relay Protection System can reflect the power system as a fault and not normal, timely acting in the circuit breaker or automatically sending signal.it is the device that could automatically, quickly and selectively remove fault component and prevent the system from damage. Therefore, it is of great practical significance for excellent structure of the developed transformer protection
The paper designed a protection configuration on the basis of the research program in the current transformers, protection principle and configuration. It forms a com Platform: |
Size: 3027968 |
Author:liubinbin |
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Description: In this paper, a simple single-phase grid connected photovoltaic (PV) inverter topology consisting of a boost section, a low-voltage single-phase inverter with an inductive filter, and a step-up transformer interfacing the grid is considered. Ideally, this topology will not inject any lower order harmonics into the grid due to high-frequency pulse width modulation operation. However, the nonideal factors in the system such as core saturation-induced distorted
magnetizing current of the transformer and the dead time of the inverter, etc., contribute to a significant amount of lower order harmonics in the grid current. A novel design of inverter current control that mitigates lower order harmonics is presented in this paper. Platform: |
Size: 18432 |
Author:hareesh |
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Description: 以12脉波整流电路为研究对象，有效降低网侧电流的谐波畸变，其主要原因在于所采用的移相变压器，能过它可使各6脉波二极管整流器产生的低次谐波相互抵消。利用Matlab—Simulink建立模型对其进行仿真，并对其产生谐波电流进行分析和计算，阐述了其消谐原理。这种整流电路采用两个6脉波二极管整流器进行串联，功率因数较高，提高了直流电压的输出能力，对减少电网中的谐波干扰十分有效，可以有效地消除钢厂电力系统中较高次数的谐波。-Low-order harmonics with 12 pulse rectifier circuit for the study, effectively reducing line current harmonic distortion, mainly due to phase-shifting transformer used, it can make each six-pulse diode rectifier generated offset each other . Using Matlab-Simulink simulation modeling them, and analyze and calculate their produce harmonic currents, described its harmonic elimination principle. This rectifier circuit uses two 6-pulse rectifier diode in series, high power factor, increase the output capacity of the DC voltage to reduce power grid harmonic interference is very effective, steel power system can effectively eliminate high the number of harmonics.
Platform: |
Size: 560128 |
Author:伍莎莎 |
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Description: 电力车载高压设备试验系统，通过串口通讯与绝缘电阻、介质损耗、回路电阻、变压器变比、直流泄漏、绕组直阻、开关特性、互感器特性、油耐压、油介损等设备进行通讯，实现试验过程的控制，并进行数据记录、保存、统计、打印等功能。-Electrical vehicle testing system for high voltage equipment，Through serial port, loop resistance and insulation resistance, dielectric loss, leakage, winding transformer, DC direct current resistance, and switches, transformer characteristics, oil pressure, oil dielectric loss and other equipment to communicate, realize the test process control, data logging, save, print and statistics functions. Platform: |
Size: 5737472 |
Author:lzy |
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Description: In order to solve the power quantity problem of negative sequence current and harmonic current in high-speed railway, railway static power conditioner (RPC) was adopted. RPC contains two inverters which are connected with each other by sharing a DC capacitor, the negative sequence current and harmonic current can be restrained together by controlling the power of the two inverters. The structure and compensation principle of RPC was introduced, and the negative sequence current and harmonic current compensating reference detecting method for three-phase Vv transformer was presented. To maintain the DC voltage and compensate negative sequence and harmonic current, the DC voltage control and the current control for two inverters of RPC was presented. Simulations have confirmed that the RPC can achieve good performance under the negative sequence and harmonic current detecting method and the control strategy proposed in this paper. Platform: |
Size: 386048 |
Author:杨松 |
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Description: In order to solve the power quantity problem of negative sequence current and harmonic current in high-speed railway, railway static power conditioner (RPC) was adopted. RPC contains two inverters which are connected with each other by sharing a DC capacitor, the negative sequence current and harmonic current can be restrained together by controlling the power of the two inverters. The structure and compensation principle of RPC was introduced, and the negative sequence current and harmonic current compensating reference detecting method for three-phase Vv transformer was presented. To maintain the DC voltage and compensate negative sequence and harmonic current, Platform: |
Size: 1656832 |
Author:yangs |
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Description: CS5460A 是一个包含两个ΔΣ模-数转换
器（ADC）、高速电能计算功能和一个串行接
口的高度集成的ΔΣ 模-数转换器。 它可以精确
测量和计算有功电能、 瞬时功率、 I
RMS 和VRMS ，
用于研制开发单相2 线或3 线电表。CS5460A
可以使用低成本的分流器或互感器测量电流，使
用分压电阻或电压互感器测量电压。CS5460A
具有与微控制器通讯的双向串口， 芯片的脉冲输
出频率与有功能量成正比。 CS5460A 具有方便
的片上AC/DC 系统校准功能-The CS5460A is a highly integrated power measurement solution which combines two ∆ Σ
Analog-to-Digital Converters (ADCs), high speed
power calculation functions, and a serial interface
on a single chip. It is designed to accurately measure and calculate: Real (True) Energy,
Instantaneous Power, IRMS, and V
RMS for single
phase 2- or 3-wire power metering applications.
The CS5460A interfaces to a low-cost shunt resistor or transformer to measure current, and to a
resistive divider or potential transformer to measure voltage. The CS5460A features a
bi-directional serial interface for communication
with a micro-controller and a pulse output engine
for which the average pulse frequency is proportional to the real power. The CS5460A has on-chip
functionality to facilitate AC or DC system-level
calibration Platform: |
Size: 574464 |
Author:longyong |
Hits:
Description: 用matlab对Buck电路进行了仿真,简单直接可用，BUCK电路就是一种DC-DC转换器，简单的讲就是通过震荡电路将一直流电压转变为一高频电源，然后通过脉冲变压器、整流滤波回路输出需要的直流电压，类似于开关电源(The BUCK circuit is a kind of DC-DC converter, which is simply to convert a DC voltage to a high frequency power supply through a concussion circuit, and then output the required DC voltage through a pulse transformer and a rectifier filter circuit, similar to a switching power supply.) Platform: |
Size: 10240 |
Author:学术爬虫 |
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Description: 变压器（Transformer）是利用电磁感应的原理来改变交流电压的装置，主要构件是初级线圈、次级线圈和铁芯（磁芯）。主要功能有：电压变换、电流变换、阻抗变换、隔离、稳压（磁饱和变压器）等。按用途可以分为：电力变压器和特殊变压器（电炉变、整流变、工频试验变压器、调压器、矿用变、音频变压器、中频变压器、高频变压器、冲击变压器、仪用变压器、电子变压器、电抗器、互感器等）。电路符号常用T当作编号的开头.例: T01, T201等。(A transformer (Transformer) is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformer) and so on. It can be divided into power transformers and special transformers (electric transformer, rectifier and transformer, power frequency transformer, voltage regulator, mine change, audio transformer, intermediate frequency transformer, high-frequency transformer, shock transformer, transformer, transformer, reactor, intersenser, etc.). Circuit symbols usually use T as the beginning of numbering. Examples: T01, T201 and so on.) Platform: |
Size: 46080 |
Author:ndbj20 |
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Search - high voltage transformer