Description: 为保障安全与电力用户供电质量，基于并网逆变器的分布式发电(distributed generation DG)系统要求具备孤岛检测功能。针对被动式孤岛检测法检测盲区(non-detectionzone，NDZ)大、检测时间长以及主动式孤岛检测法影响分布式发电系统供电质量的缺点，提出了一种新的被动式孤岛检测方法。该方法利用小波变换从公共耦合点(point ofcommon coupling，PCC)处的电压信号及逆变器输出电流信号中提取特征量，再通过BP 神经网络进行模式识别来判断是否出现孤岛现象。仿真与实验结果表明，该方法比传统的被动式孤岛检测方法检测速度快，检测盲区小。同时，由于所提供的孤岛检测法没有向控制信号中加入扰动量，因而不会对电能质量产生不良影响，克服了主动式孤岛检测方法的不足，并具有很高的准确性与可靠性。-The function of islanding detection is required for the grid-connected inverter-based distributed generation system due to safety reasons and to maintain the quality of power supply. Passive methods have a large non detection zoneand the detecting time is long, while active schemes have negative influence on power quality, so a novel passive islanding detection method was proposed. In this method, wavelet transform was adopted to extract feature vectors the voltage of point of common coupling (PCC) point and the output current of inverter, and then pattern recognition was exerted by BP neural network to determine whether there was an island phenomenon. The simulation and experiment results show that this method is faster than the traditional passive methods in islanding detection, and the non-detection zone is smaller. At the same time, because no disturbance was added to the control signal in the method, there isn’t a negative impact on power quality. The method overcomes the shortco Platform: |
Size: 609280 |
Author:kiel |
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Description: 随着信息技术不断发展，尤其是信息网络化的应用，仓储信息处理越来越复杂，信息数据量也更为庞大，来源分布广而 复杂。如果仍采用手工收集数据，会大大增加信息采集人员和信息输入人员，降低信息正确率和信息系统的执行效率。为了实现信息的快速准确的输入，物流企业在 不断寻找新的解决方案。-With the continuous development of information technology, especially the application of information network, storage information processing more and more complex, the amount of information and data is also more large, the source is widely distributed and complex. If you still use manual data collection, will greatly increase the information gathering and information input personnel, reduce the accuracy of information and information system implementation efficiency. In order to achieve fast and accurate information input, logistics enterprises are constantly looking for new solutions. Platform: |
Size: 6923264 |
Author:刘 |
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Description: Final Project Proposal: Design Smart Parking System Based on WSN Using Delay Efficient Distributed Data Aggregation Algorithm Platform: |
Size: 544768 |
Author:fazafrahman |
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Description: This simulation presents a PI algorithm
control strategy for PV system connected to a three-phase voltage source inverter of
a distributed generation system in the stand-alone operation
mode to guarantee good performance of the load output voltage Platform: |
Size: 31744 |
Author:Rachid/s |
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Description: 一款面向独立卖家的单用户开源网店系统，基于PHP+MySQL框架开发，通过它可以迅速建立起一个B2C网上商城。
iWebShop基于iWebSI框架开发，在获得iWebSI技术平台库支持的条件下，iWebShop可以轻松满足用户量级百万至千万级的大型电子商务网站的性能要求。站点的集群与分布式技术（分布式计算与存储/高可用性/负载均衡）被屏蔽在SI平台之内，基于iWebShop并且按照SI平台库扩展规范开发的新增功能模块，也将同时获得这种超级计算与处理的能力。
iWebShop集成了一切网店必要的功能模块，且不臃肿，是您首选建站绿色程序。其 100 的源码开放性更使得无数开发者和模板设计者参与其中！-An independent seller of single user open source shop system, based on the development of PHP+MySQL framework, through which it can quickly set up a B2C online mall.
IWebShop based on the iWebSI framework development, access to iWebSI technology platform to support the conditions of the library, iWebShop can easily meet the needs of the user level of millions to millions of large-scale e-commerce site performance requirements. Cluster and distributed technology site (distributed computing and storage/high availability/load balancing) is blocked in SI platform, SI platform and iWebShop library according to the expansion of new function module specification based on the development of the ability will also be the super computing and processing.
IWebShop integrates all the necessary functional modules shop, and not bloated, you are the first choice of green program. 100 of its open source makes countless developers and template designers involved! Platform: |
Size: 12646400 |
Author:keyin |
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Description: etcd 是一个高可用的 Key/Value 存储系统，主要用于分享配置和服务发现。etcd 的灵感来自于 ZooKeeper 和 Doozer，侧重于：
简单：支持 curl 方式的用户 API (HTTP+JSON)
安全：可选 SSL 客户端证书认证
快速：单实例可达每秒 1000 次写操作
可靠：使用 Raft 实现分布式-Etcd is a highly available Key/Value storage system that is primarily used to share configuration and service discovery. Etcd is inspired by ZooKeeper and Doozer, focusing on:
Simple: support for curl user API (HTTP+JSON)
Security: optional SSL client certificate authentication
Fast: single instance up to 1000 write operations per second
Reliable: using Raft to achieve distributed Platform: |
Size: 3233792 |
Author:园小小 |
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Description: 为扩展而设计，同时为基本的HTTP协议提供强大的支持，HttpClient组件也许就是构建HTTP客户端应用程序，比如web浏览器，web服务端，利用或扩展HTTP协议进行分布式通信的系统的开发人员的关注点。-Designed for expansion, and provide strong support for the basic HTTP protocol, the HttpClient component may be building HTTP client applications, such as web browser, web server, or the use of distributed communication system HTTP protocol extension of the attention of developers. Platform: |
Size: 815104 |
Author:吴聊 |
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Description: 蚁群算法(Ant Colony Optimization,ACO)是一种新颖的组合优化算法,它具有较强的鲁棒性、优良的分布式计算机制、易于与其他方法相结合等优点.包括改进的蚁群算法求解最优路径MATLAB源码，运行环境R2014b-Ant colony algorithm (Ant Colony Optimization, ACO) is a novel combinatorial optimization algorithm that is robust, excellent distributed computer system, easy to combine with other methods and other advantages, including improved ant colony algorithm find the optimal path MATLAB source, operating environment R2014b Platform: |
Size: 6144 |
Author:高帅 |
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Description: 模拟M/M/1排队系统，到达时间为泊松过程，处理时间为指数分布-Simulated M/M/1 queuing system, the arrival time of a Poisson process, the processing time is exponentially distributed Platform: |
Size: 1024 |
Author:王超然 |
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Description: 排队论（姜启源-数学建模）在教科书第5.5节实施港口系统模型。 获得港口中船舶的平均时间，港口船舶的最长时间，船舶的平均等待时间，船舶的最长等待时间，时间的百分比码头设施在以下情况下空闲，至少进行模拟 1000艘船。
（a）连续船舶之间的时间是在15和145分钟之间均匀分布的随机变量。 每艘船的卸载时间从45分钟均匀分布到90分钟。
-Queuing model- Implement the harbor system models in Section 5.5 of the textbook.
Obtain Average time of a ship in the harbor, maximum time of a ship in the harbor,
average waiting time of a ship, maximum waiting time of a ship, percentage of time dock
facilities are idle for the following scenarios by performing simulation for at least 1000
ships.
(a) Time between successive ships is a random variable uniformly distributed between
15 and 145 min. Unloading time per ship is uniformly distributed 45 to 90 min. Platform: |
Size: 1024 |
Author:anyway_hi |
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Description: 求一给定离散系统的零、极点极其分布图和幅度相位频率响应曲线-Find the zero, pole extremely distributed and amplitude phase frequency response curves of a given discrete system Platform: |
Size: 280576 |
Author:Raina |
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Description: Different types of distributed generation (DG) are
broadly used and optimally placed in a distribution system to
improve its performance. Since the network configuration affects
the system operational conditions, the network reconfiguration
and DG placement should be manipulated simultaneously. Nevertheless, the complexity of the problem may prevent achieving
the optimal solution. This paper presents a novel hybrid method of
metaheuristic and heuristic algorithms, in order to boost robustness and shorten the computational runtime to achieve network
minimum loss configuration in the presence of DGs. -Different types of distributed generation (DG) are
broadly used and optimally placed in a distribution system to
improve its performance. Since the network configuration affects
the system operational conditions, the network reconfiguration
and DG placement should be manipulated simultaneously. Nevertheless, the complexity of the problem may prevent achieving
the optimal solution. This paper presents a novel hybrid method of
metaheuristic and heuristic algorithms, in order to boost robustness and shorten the computational runtime to achieve network
minimum loss configuration in the presence of DGs. Platform: |
Size: 766976 |
Author:maryam_sadeghi |
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Description: SMART DISTRIBUTION SYSTEM AUTOMATION:
NETWORK RECONFIGURATION AND ENERGY
MANAGEMENT
Smart distribution system automation is the key to realizing a highly reconfigurable,
reliable, flexible and active distribution system. Automated network reconfiguration
including restoration is the most studied area in distribution automation, and it
contributes to power loss minimization, voltage improvement and also can enable the
distribution network to respond to contingencies and changes happened in the grid.
Distributed energy resources at the customer premises, energy storage systems and plugin electric vehicles are indispensable parts of future smart distribution systems Platform: |
Size: 3035136 |
Author:maryam_sadeghi |
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Description: A wireless sensor network (WSN) is a wireless
network consisting of spatially distributed autonomous devices using sensors to monitor
physical or environmental conditions. A WSN system incorporates a gateway that provides
wireless connectivity back to the wired world and distributed nodes. Platform: |
Size: 977920 |
Author:gurmeet |
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Description: 大数据统计单词代码源码，还有分布式文件系统上传文件代码，rpc远程调用代码-Big data statistics the word code, source code, and the file on the file system of distributed code, RPC remote procedure call code
Platform: |
Size: 38553600 |
Author:白江龙 |
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Description: This paper proposes a Flexible D-STATCOM (Distribution STATIC Compensator) and its new
controller system, in IEEE 13-bus industrial distribution system, that be able to both mitigate all types of series
faults (open-circuit or open conductor faults) and operate as a Distributed Generation (DG), when it supplies power
to sensitive loads while the main utility source is disconnected (i.e. it is under islanded operating condition). Thus
D-STATCOM operates same as a Flexible DG (FDG) and consequently, it is called Flexible D-STATCOM (FDSTATCOM). In this paper, the 12-pulse FD-STATCOM configuration with IGBT is designed and the graphic based
models of the FD-STATCOM are developed using the PSCAD/EMTDC electromagnetic transient simulation
program. The reliability and robustness of the control schemes in the system response to the voltage disturbances
caused by series faults and islanded operating condition are obviously proved in the simulation results. Platform: |
Size: 117760 |
Author:phdscolar11
|
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