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: 无功优化IEEE论文With the increased loading of existing power system, the problem of voltage stability
and voltage collapse has become a major concern in power system planning and operation. The
dependence of the system voltage profile on reactive power distribution forms the basis for reactive
power optimisation. The technique attempts to utilises fully the reactive power sources in the
system to improve the voltage profile and also to meet the reactive power requirements at the
AC–DC terminals to facilitate the smooth operation of DC links. The method involves successive
solution of steady-state power flows and optimisation of reactive power control variables with
unified power flow controllers using linear programming technique. The proposed method has-With the increased loading of existing power system, the problem of voltage stability
and voltage collapse has become a major concern in power system planning and operation. The
dependence of the system voltage profile on reactive power distribution forms the basis for reactive
power optimisation. The technique attempts to utilises fully the reactive power sources in the
system to improve the voltage profile and also to meet the reactive power requirements at the
AC–DC terminals to facilitate the smooth operation of DC links. The method involves successive
solution of steady-state power flows and optimisation of reactive power control variables with
unified power flow controllers using linear programming technique. The proposed method has
been tested on a real life equivalent 96-bus AC and a two terminal DC system. Platform: |
Size: 470016 |
Author:liuzhaohua |
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Description: 电力系统中要求电压稳定度和无功功率满足一定的技术指标，利用带独立直流电源的级
联式多电平逆变器和多电平逆变器最优化谐波台阶式调制技术(OHSW)设计的STATCOM装置，
可以使电力系统中的电压得到稳定以及无功功率和谐波得到有效补偿。本文主要介绍了STAT-
COM装置主电路的设计，主电路是STATCOM装置与系统进行交换有功功率与无功功率的环节。
该装置具有输出谐波含量低、损耗小、性能可靠等优点。-Requirements of power system voltage stability and reactive power to meet certain technical specifications, the use of DC power supply with independent level
Joint multi-level inverter and multi-level inverter optimized harmonic stepped modulation (OHSW) design of the STATCOM device,
Can make the power system voltage stability and reactive power to be harmonic and effective compensation. This paper describes the STAT-
COM device main circuit design, is the STATCOM main circuit switching devices and systems for active and reactive power component.
The device has a low output harmonic content, low loss, performance, and reliable. Platform: |
Size: 249856 |
Author:zhwb |
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Description: 使用MATLAB/SIMULINK分析简单电力系统的小信号（低频振荡）稳定性，研究内容如下：
1）使用SIMULINK建立系统的仿真模型。
2）分析比较有无AVR、PSS对小信号稳定性的影响。
3）分别画出针对励磁机增益KA和PSS增益KSTAB的根轨迹图，分析总结增益KA和KSTAB对小信号稳定性影响的规律。
4）仿真在电压参考值5 阶跃变化情况下有无PSS时的转速响应。
-Using MATLAB/SIMULINK analysis of a simple power system small signal (low frequency oscillation) stability study are as follows:
1) Use SIMULINK to establish a system simulation model.
2) analysis of whether the AVR and PSS for small signal stability.
3) Draw the exciter gain KA PSS gain KSTAB, the root locus plot, analyze and summarize the gain KA and KSTAB small-signal stability of the law.
4) simulation in the case of a 5 step change of the voltage reference value the speed of response with or without PSS.
Platform: |
Size: 8192 |
Author:童童 |
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Description: 关于DFIG的低压穿越能力的研究。对以后实现低压穿越做一些探索性的工作-Along with the sharp increase in the proportion of wind power supply some areas the impact of Large-scale wind farms for the stability of regional power grid is more significant. The research on low voltage ride-through (LVRT) of wind power system based on doubly-fed induction generators (DFIG) becomes a hot issue. In this paper ,Firstly introduces the concept of low voltage ride-through technology, The standards of LVRT of some European countries are presented, And then analyses and compares the kinds of common realize low voltage ride- technology and improve control strategy. The transient characteristics of DFIG when the grid voltage sagging. Platform: |
Size: 327680 |
Author:韩萌 |
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Description: The fast control capability of the VSC-HVDC and
the process of area mode oscillations are analyzed. An auxiliary
fuzzy logic controller designed in Matlab for the Voltage Source
Converter based HVDC transmission system, VSC-HVDC, to
improve the stability of the AC/ DC system is designed to enhance
stability by increasing the deceleration energy of oscillation.
Simulation results on the IEEE 4-generator AC/DC power
systems have shown that the controller can enhance the dynamic
stability of interconnected power systems effectively and is robust
to the variation of system operating conditions and oscillation
modes. Platform: |
Size: 345088 |
Author:Bidyut Hota |
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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 |
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Description: Preparation study for voltage stability for a power system with large portion of renewable energy
Eng.Mohammad al-shrida-Preparation study for voltage stability for a power system with large portion of renewable energy
Eng.Mohammad al-shrida Platform: |
Size: 380928 |
Author:mohad1 |
Hits:
Description: 连续潮流：又称为延拓潮流，是电力系统电压稳定性分析的有力工具，它通过在常规潮流基础上引入一个负荷增长系数来克服雅可比矩阵奇异，从而克服接近稳定极限运行状态时的收敛问题，解决了常规潮流在崩溃点外无解和在崩溃点附近不能可靠收敛的问题。-Continuous flow: also known as extension tide, is a powerful tool for system voltage stability analysis of power, it is by introducing a load factor in the growth trend basis to overcome the conventional Jacobian matrix is singular, thus overcoming the convergence close to steady state operation of the limit problem, to solve the conventional trend points outside the crash and no solution can not be reliably near the breaking point of convergence problems. Platform: |
Size: 3072 |
Author:余先生 |
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Description: In a deregulated utility environment financial and market forces will demand a more optimal and profitable
operation of the power system with respect to generation, transmission and distribution. Power electronic
equipment such as flexible AC Transmission systems (FACTS) opens up new opportunities for controlling power
and enhancing the usable capacity in the existing system. A Static synchronous compensator (STATCOM) based
on the voltage Sourced inverter is a widely used shunt FACTS device. This paper deals with the basic simulation
of STATCOM for two machine system and demonstration of transient stability enhancement using STATCOM
through Matlab/Simulink/Power system Computer Aided design (PSCAD). Platform: |
Size: 19635200 |
Author:Kandiban Rajendran |
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Description: 本书是关于电力系统分析的经典教材，对于应用程序实现电力系统稳定有极好的讲解，特别是对电压稳定调节的程序实现有很好的见解。希望对该领域的学习者有帮助。-This book is about the power system analysis of the classic textbook, for applications to achieve a stable power system has an excellent explanation, especially for voltage stability and regulation of procedures to achieve good insights. I hope this field learner helpful. Platform: |
Size: 5989376 |
Author:刘、文萱 |
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Description: This powerful code helps you determine the static voltage stability of a power system. The code is really useful for power engineers.Also it can determine the optimal location of a DG to improve the voltage stability limit of power system. Platform: |
Size: 9216 |
Author:mehdi |
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Description: 鉴于分布式光伏发电井网系统的电压稳定性对现实生话有重要意义.从下程角度给出380/220 V低压
配电网电压失稳的实用判抓.运用I SC 八I>软件构建了一个分布式光伏电源接入0. } kV配电网的3竹点系
统仿真模型.在此基础上分析了负荷增加、光照强度突降、环境温度增大以及负荷母线发生短路故障等扰动对
负荷电压稳定性的影响。仿真结果表明.当负荷电压接近电压稳定限定伯正常运行时.光照强度突降会使负
荷母线电压失去稳定:温度变化对负荷电压的影响甚微:短路故障消除后负荷母线电压则能够快速得到恢复.
不会导致电压失稳。-The voltage stability of distributed photovoltaic generation system has a significant role in actual life. }hhc
practical criterion of voltage instability for the 38()一220 V low-voltage distribution network was discussed the vicw-
point of engineering. hhe PSC 八I} software was used to build a()} kV 3-bus distributed network simulation model contai-
ning a grickconnected distributed photovoltaic power. ()n that basis.the influences on the load voltage stability were ana-
ly}ed by considering various disturbances, such as the growth of load·sudden reduction of light intensity, rise in environ-
mental temperature and the short circuit fault of the load bus. Simulation results show that when the load voltage is ap-
proaching the limit of voltage stability, the sudden reduction of light intensity will make the load bus voltage lose stability
while the influence of temperature change is very tiny the load bus voltage will recover the original value quickly after the
short circ Platform: |
Size: 120832 |
Author:高抢 |
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Description: This paper deals with the design and implementation of
a multilevel voltage source converter based static synchronous
compensator (STATCOM) employing an effective modulation
control technique simulated in a MATLAB Simulink
environment. The main objective of this paper is to maintain the
voltage stability by compensating the reactive power in the power
system. Hence, a new efficient control strategy is proposed, in
order to reduce the voltage fluctuations like sag and swell
conditions and also to isolate current and voltage harmonics in
the transmission system. The multilevel STATCOM which can be
used at the point of common coupling (PC C), for improving
power quality is modelled and simulated using proposed control
strategy and the performance is compared by applying it to an
llOkv line with and without STATCOM. Relative Harmonic
analysis is also discussed in this paper based on the total
harmonic distortion (THD) calculations. Platform: |
Size: 35840 |
Author:hareesh |
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Description: A combination of genetic algorithm and particle swarm optimization for optimal
DG location and sizing in distribution systems
Distributed generation (DG) sources are becoming more prominent in distribution systems due to the
incremental demands for electrical energy. Locations and capacities of DG sources have profoundly
impacted on the system losses in a distribution network. In this paper, a novel combined genetic algorithm
(GA)/particle swarm optimization (PSO) is presented for optimal location and sizing of DG on distribution
systems. The objective is to minimize network power losses, better voltage regulation and
improve the voltage stability within the frame-work of system operation and security constraints in
radial distribution systems. A detailed performance analysis is carried out on 33 and 69 bus systems
to demonstrate the effectiveness of the proposed methodology. Platform: |
Size: 534528 |
Author:fifo_enp |
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Description: 构建一个电力系统双机三节点的电力系统，用于进行电力系统电压稳定性分析和仿真-Construction of a power system two-machine three-node power system for power system voltage stability analysis and simulation Platform: |
Size: 1024 |
Author:小孜 |
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Description: The paper presents the bacterial foraging optimization algorithm (BFOA) and particle swarm optimiza-
tion (PSO) algorithm based robust controllers for voltage deviations due to the variation of reactive power
in an isolated wind-diesel hybrid power system. The isolated wind-diesel system consists of wind energy
conversion system (WECS) utilizing a permanent magnet induction generator (PMIG). Further, a syn-
chronous generator (SG) is used with the diesel engine set for power generation. The mismatch between
generated and consumed reactive power in the system causes voltage fl uctuations, which will occur at
generator terminals. These oscillations further causes reduction in the stability and quality of the power Platform: |
Size: 2063360 |
Author:Gomaa Haroun |
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Description: This paper investigates the effects of Static Var
Compensator (SVC) on voltage stability of a power system. This
paper will discuss and demonstrate how SVC has successfully
been applied to power system for effectively regulating system
voltage. One of the major reasons for installing a SVC is to
improve dynamic voltage control and thus increase system load
ability. This paper presents modeling and simulation of SVC in
MATLAB/Simulink. In this paper A SVC is used to regulate
voltage in a power system. When system voltage is low the SVC
generates reactive power (SVC capacitive). When system
voltage is high it absorbs reactive power (SVC inductive). The
SVC is rated +100 Mvar capacitive and 50 Mvar inductive. The
SVC more effectively enhance the voltage stability and increase
transmission capacity in a power system. Platform: |
Size: 141312 |
Author:ashijun
|
Hits:
Description: 连续潮流：又称为延拓潮流，是电力系统电压稳定性分析的有力工具，它通过在常规潮流基础上引入一个负荷增长系数来克服雅可比矩阵奇异，从而克服接近稳定极限运行状态时的收敛问题，解决了常规潮流在崩溃点外无解和在崩溃点附近不能可靠收敛的问题。连续潮流法是从初始稳定工作点开始，随着负荷缓慢变化，沿相应的PV曲线对下一工作点进行预估、校正，直至勾勒出完整的PV曲线。(Continuous flow: also known as the continuation of the trend, is a powerful tool for voltage stability analysis of power system, by introducing a load growth coefficient to overcome Jacobi singular in the conventional power flow basis, so as to overcome the convergence problem near the stability limit of the running state, to solve the conventional power flow solution and in near collapse point reliable convergence problem in the collapse point. The continuation power flow method starts with the initial stable working point. With the slow load change, it predicts and corrections the next working point along the corresponding PV curve until the complete PV curve is outlined.) Platform: |
Size: 2048 |
Author:冒菜 |
Hits:
Description: 使用MATLAB/SIMULINK分析简单电力系统的小信号（低频振荡）稳定性，研究内容如下： 1）使用SIMULINK建立系统的仿真模型。 2）分析比较有无AVR、PSS对小信号稳定性的影响。 3）分别画出针对励磁机增益KA和PSS增益KSTAB的根轨迹图，分析总结增益KA和KSTAB对小信号稳定性影响的规律。 4）仿真在电压参考值5 阶跃变化情况下有无PSS时的转速响应。(Using MATLAB/SIMULINK analysis of a simple power system small signal (low frequency oscillation) stability study are as follows: 1) Use SIMULINK to establish a system simulation model. 2) analysis of whether the AVR and PSS for small signal stability. 3) Draw the exciter gain KA PSS gain KSTAB, the root locus plot, analyze and summarize the gain KA and KSTAB small-signal stability of the law. 4) simulation in the case of a 5 step change of the voltage reference value the speed of response with or without PSS.) Platform: |
Size: 8192 |
Author:摇铃 |
Hits:
Search - voltage stability for a power system