Location:
Search - DC power grid
Search list
Description: 2009年全国大学生电子设计大赛A题：光伏并网发电模拟装置 ，实现对光伏并网发电模拟装置的原理和结构进行参数的计算与分析，设计并制作了一个设计并制作一个光伏并网发电模拟装置。本系统以ARM7 LM1138为处理核心能实现了用直流稳压电源和电阻模拟光伏电池，经过SPWM和H桥的DC/AC转换，滤波整流成正弦波后再经变压器逆变从而实现模拟并网，系统具有频率、相位采集跟踪功能和电压电流采集功能。-2009 National Undergraduate Electronic Design Contest A question: grid-connected PV simulator achieve grid-connected PV simulation device parameters of the principles and structure calculation and analysis, design and production of a design and production of a photovoltaic grid simulator. The system ARM7 LM1138 as the processing core can be achieved using DC power supply and resistor simulation photovoltaic cells, after SPWM and the H bridge DC/AC conversion, filtering through the transformer and then rectified into a sine wave inverter in order to achieve simulation of grid , the system has a frequency, phase acquisition and tracking function of voltage and current collection.
Platform: |
Size: 1049600 |
Author: 肖鸽 |
Hits:
Description: 在卡尔波利可持续力电机资源（超）项目正在开发太阳能直流配电系统设计的智能服务，几乎任何可能由一个离网的家庭需要负荷-At Cal Poly Sustainable Power motor resources (super) project is the development of solar DC power distribution system design, intelligent service, almost any possible off-grid home by a need to load
Platform: |
Size: 8192 |
Author: skyky |
Hits:
Description: Taking into account all the parameters mentioned, forming the appropriate programming to the controller in order to achieve the synchronization between the two systems, the appropriate amplitude and as well as the power management to the DC to control the power that is injected to the electrical grid, the results we take are in the range of high performance inverters. In this simulation scenario the power is high as the current has been increased and the THD is low
Platform: |
Size: 305152 |
Author: mimo |
Hits:
Description: 基于saber电源仿真软件的DC-AC简单并网控制电路-Simulation software based on saber power DC-AC grid simple control circuit
Platform: |
Size: 7168 |
Author: 李连玉 |
Hits:
Description: The ever-increasing reliance on electronic devices which utilize AC power highlights the problems associated with the unexpected loss of power from the electrical grid. In places where the electrical infrastructure is not well-developed, brown-outs can prove fatal when electronic medical instruments become unusable. Therefore, there is a need for inexpensive and reliable pure-sine wave inverters for use with medical devices in the underdeveloped world. This report documents the development of one component of an uninterruptible power supply, the DC-to-AC inverter. Through the use of analog signal processing techniques, a prototype which efficiently and accurately emulates the pure-sine wave power present on the power grid was created. The three-level PWM system within this report is created with the possibility of a feedback-regulated system to be implemented in the future.
Platform: |
Size: 3406848 |
Author: Dries |
Hits:
Description: New Positive sequence Voltage Detector for Grid Synchronization of Power Converters under Faulty Grid Conditions
Platform: |
Size: 908288 |
Author: masi |
Hits:
Description: 多端直流输电系统(multi-terminal DC，MTDC)为解决
大型风电基地功率外送的瓶颈问题提供了一个最佳解决方
案。研究了基于电压源换流器(voltage source converter，VSC)
的多端直流输电系统应用于大规模风电功率长距离外送时
的协调控制策略。通过构建一个四端系统连接两个大型风电
基地及本地电网向远方负荷中心进行功率输送，实现了风电
场的功率汇集和外送。仿真验证了该协调控制策略在大扰动
情况下，不仅能够提高VSC-MTDC系统潮流重新分配的能
力，而且可使风电场对直流网络提供一定功率支撑，增强了
电力系统动态稳定性
-Multi-terminal DC (MTDC) power transmission
system is regarded as the optimal solution scheme to sent out
power from large-scale wind farm. A coordinated control
strategy for voltage source converter (VSC) based MTDC
transmission system applied to long-distance power
transmission from large-scale wind farm is researched. By
means of constructing a four-terminal system connecting two
large-scale wind power bases with local power grid to send out
power to faraway load center, the wind power converging and
sending out by the proposed coordinated control strategy are
implemented. Simulation results show that the proposed
coordinated control strategy not only can improve the ability of
reallocating power flow in VSC-MTDC transmission system
under large disturbance, but also can make wind power base
providing a certain power support to DC transmission network,
thus the dynamic stability of power grid can be enhanced.
Platform: |
Size: 645120 |
Author: chenchen |
Hits:
Description: This paper
presents a PSCAD/EMTDC model of PV solar panels, the grid
connected three phase voltage sourced inverter (VSI) and its
controller system. The VSI control is implemented with current
control loops. A maximum power point tracking (MPPT)
algorithm is implemented to get the maximum output power for
any given solar irradiation and temperature. This is integrated
with the inverter control in such a way that the requirement of
DC-DC converter is eliminated to harvest the maximum power.
The inverter model also maintains near unity power factor
regardless of the level of power output and maintains an
acceptable level of current harmonics. Finally, the developed
model is validated with the output of a commercially used PV
module.
Platform: |
Size: 355328 |
Author: 起个名字真难 |
Hits:
Description: 自己弄的多端直流配电网的仿真模型，是支撑自己小论文的东东。仿真环境是用的matlab。-Get yourself a simulation model with a multi-terminal DC power grid, is supporting their own small paper stuff. Simulation environment is used matlab.
Platform: |
Size: 31744 |
Author: 孙承祥 |
Hits:
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 |
Hits:
Description: An Integrated AC/DC Super-Grid System -A Mechanism to Solving
the North American Power Cr-An Integrated AC/DC Super-Grid System -A Mechanism to Solving
the North American Power Crisis
Platform: |
Size: 3258368 |
Author: rami |
Hits:
Description: 本文基于宁东直流输电工程的实际设备的数据,在PSCAD/EMTDC中建立了包含换流器、换流变压器、直流滤波器、交流滤波器和无功补偿设备、平波电抗器以及直流输电线路的模型,并按照CIGRE直流输电系统基准模型的典型控制方式,建立了初步的直流输电三级控制结构,并分析了控制逻辑中PI环节参数的选择问题：基于BPA仿真模型中的元件模型与参数,在PSCAD/EMTDC中建立了山东电网500kV动态等值之后的交流系统模型,包括发电机、励磁机、调速器、电力系统稳定器、变压器、负荷以及输电线路等设备的模型,利用PSCAD/EMTDC自定义开发功能,用C语言开发了励磁系统自定义饱和模块。-Based on the data of the actual device Ningdong HVDC projects established comprising converter, converter transformers, DC filters, AC filter and reactive compensation devices, smoothing reactors and DC transmission line in PSCAD/EMTDC in the model and follow the typical control mode CIGRE HVDC system reference model, the establishment of a preliminary three HVDC control structure, and analyze the selection control logic PI link parameters: BPA-based simulation model component model and parameters in PSCAD/EMTDC established a dynamic equivalence Shandong power grid after the 500kV AC system model, including the model generator, exciter, governor, power system stabilizer, transformers, load and power transmission lines and other equipment, the use of PSCAD/EMTDC custom development capabilities, using C language to develop custom saturation block the excitation system.
Platform: |
Size: 9858048 |
Author: Zerope |
Hits:
Description: 光伏并网系统以MSP430F169 单片机为核心，单片机输出SPWM 波形经IR2110驱动H桥，实现DC-AC 逆变。最大功率点跟（MPPT）绝对误差小于1 ，利用430单片机软件实现锁相环，用参考频率作为基准频率，对MSP430单片机的外中断和定时器测定相位，当反馈的电压信号相位滞后（超前）于参考信号的相位时，就增大（减小）SPWM的频率；达到相位和频率同步。包括阻性负载，以及非阻性负载，实现了频率跟踪，相位跟踪。DC-AC 转换效率达88 ，人机接口LCD液晶显示器，界面直观、简洁，显示输出电压、电流，具有良好的人机交互性能。-Photovoltaic (pv) grid system to MSP430F169 microcontroller as the core, the microcontroller output SPWM waveform by IR2110 driver H bridge, realize DC- AC inverter. Maximum power point (MPPT) with absolute error less than 1 , using 430 single chip microcomputer software phase-locked loop, with the reference frequency as a benchmark, external interrupt and timer of MSP430 single chip microcomputer phase, when the voltage feedback signal phase lag (advanced) in the phase of reference signal, will increase (decrease) of SPWM frequency To achieve phase and frequency synchronization. Including impedance load, as well as non resistance load, has realized the frequency tracking and phase tracking. DC- AC conversion efficiency up to 88 , and the man-machine interface LCD liquid crystal display, intuitive interface, concise, shows that the output voltage, current, has the good man-machine interactive performance.
Platform: |
Size: 380928 |
Author: Tim Denve |
Hits:
Description: “Grid Connected
PV Systems with Smart grid functionality”. It solves the problem of shading to the available
NTNU PV modules which is sensitive to the exiting central inverter system topology by
proposing a PV system which is more efficient and reliable. This thesis is focused on the
design of the PV-grid connected inverter power stage that supports the proposed PV system
under study. As part of the NTNU renewable energy laboratory project, a single phase 1kW,
230V, dual power stage inverter is designed. The important parameters required for inverter
stage including input inductance and capacitance, DC –Link capacitance and LCL filter were
designed.
Platform: |
Size: 1492992 |
Author: roshan |
Hits:
Description: 双向PWM控制，通过PWM控制直流侧的电压以及交流侧的PQ，不受大电网干扰，还具有帮大电网补偿无功的能力。-Bidirectional PWM control, through the PWM control of the DC side of the voltage and the AC side of the PQ, not by the large power grids, but also has the ability to help large power grid compensation.
Platform: |
Size: 16384 |
Author: Wind |
Hits:
Description: The existence of the modules capacitors necessitates the control of their voltage level. A
dedicated controller is described that has two main parts the averaging controller that takes
care of the average capacitor voltage level per leg and the balancing controller that regulates
the voltage of each capacitor separately. In this application the load is well specified and the dc-link voltage of the converter can be assigned to the averaging controller. The power flow control and the grid current quality are-The existence of the modules capacitors necessitates the control of their voltage level. A
dedicated controller is described that has two main parts the averaging controller that takes
care of the average capacitor voltage level per leg and the balancing controller that regulates
the voltage of each capacitor separately. In this application the load is well specified and the dc-link voltage of the converter can be assigned to the averaging controller. The power flow control and the grid current quality are
Platform: |
Size: 1327104 |
Author: nasreen |
Hits:
Description: Two demos illustrate use of SimPowerSystems for modeling a PV array connected to a utility grid.
PVarray_Grid_IncCondReg_det.mdl is a detailed model of a 100-kW array connected to a 25-kV grid via a DC-DC boost converter and a three-phase three-level Voltage Source Converter (VSC). Maximum Power Point Tracking (MPPT) is implemented in the boost converter by means of a Simulink model using the “Incremental Conductance + Integral Regulator” technique.
PVarray_Grid_PandO_avg.mdl is an average model of a 200-kW array connected to a 25-kV grid via two DC-DC boost converters and a single three-phase VSC. The MPPT controller based on the “Perturb and Observe” technique is implemented by means of a MATLAB Function block that generates embeddable C code.
Platform: |
Size: 589824 |
Author: Soremekun Nurudeen |
Hits:
Description: There is a possibility that firrther splits in our ac networks might be convenient or
necessary. Such splits may be desired to prevent loop flows and other transmission constraints
fbtstrating open and efficient use of the transmission grid. A purely technical reason could
also make further divisions desirable. That is, increased regional generating capacity without a
corresponding increase in transmission capacity across key transmission ‘interfaces between
generation/load regions could lead to reduced synchronizing capability on those interfaces.
Section 8 addresses two examples where future synchronizing capability between regions interior
to the eastern U.S. network might dimini& to levels low enough to warrant some action. In such
cases, it may prove more economical to split the ac network and reconnect at selected buses with
back-to-back dc links than it would be to add new ac lines or reinforce the existing ac lines.
Platform: |
Size: 6099968 |
Author: ash |
Hits:
Description: 《交直流电力系统仿真技术》对以南方电网为典型的交直流混合电力系统仿真技术进行了总结和探索，《交直流电力系统仿真技术》是我国第一本系统地介绍和分析交直流电力系统仿真技术的专著-" AC-DC power system simulation technology" for China Southern Power Grid to typical AC-DC hybrid power system simulation technology are summarized and exploration, " AC-DC power system simulation technology," this is the first systematic presentation and analysis of AC and DC power system simulation technology monograph
Platform: |
Size: 4900864 |
Author: qinyanhui |
Hits:
Description: 船舶直流电网相关文献，可以帮助很好理解船舶直流电网，非常有帮助(The relevant literatures of the ship DC power network can help to understand the ship's DC power grid very well.)
Platform: |
Size: 13890560 |
Author: shusheng
|
Hits: