光伏發電是未來新能源發電重要方向之一，而光伏變流器是光伏發電系統的核心。介紹一種基于微網理念的光伏變流器設計。以該變流器為核心的光伏發電系統可以看做一個小型的微網系統。該系統能根據外部電網情況，工作于并網模式和離網模式。介紹了該系統的各個組成部件的設計以及變流器主電路部分器件的選型。最后，由實驗樣機進行測試。試驗結果驗證了電路拓撲結構及控制方案的可行性，也說明了系統參數設計方法的正確性。 Abstract: Solar Photovoltaic generation is an important direction of new energy power generation in the future，while photovoltaic converter is the core of photovoltaic generation system. This paper deals with a study on photovoltaic inverter based on the concept of microgrid. This paper describes a system whose core component is the photovoltaic inverter，can work on grid-connected mode or run independently according to the external situation. The paper simply describes the main components of the system. At last，the prototype was produced and tested. Test result has proved feasibility of circuit topology structure and controlling scheme and shown correctness of system parameters.Key words: PV inverter； microgrid； off-grid； storage battery
上傳時間： 2014-12-24
上傳用戶：Shaikh
為提高太陽能的利用率，以ATmega8單片機為控制核心，設計了一套光電跟蹤與視日運動軌跡跟蹤互補控制的雙軸太陽跟蹤器。該跟蹤器在晴天時，利用光敏電阻采集光強判斷太陽位置,控制步進電機實現光電跟蹤；在陰天時，采集時鐘器件PCF8583的時間信息,計算當前太陽位置來實現視日運動軌跡跟蹤。實驗表明：該太陽跟蹤器能在不同天氣狀況下對太陽進行較準確地跟蹤，能量接收效率提高了30%，達到充分利用太陽能的目的。 Abstract: To improve the utilization rate of solar energy，a kind of solar tracking controller which effectively combined the sun angle tracking and photo electric tracking based on ATmega8is designed.In the sunny days，the solar tracking con-troller determines the sun's position by using photosensitive resistances to collect light intensity and control stepper motors to achieve photo electric tracking，n cloudy days，it collects clock chip PCF8583time information to calculate the current position of the sun and achieve the sun angle tracking.Experimental results show the solar tracking controller accurately tracks the sun in different weather conditions，improves received energy efficiency by30%and reaches the purpose of full use of solar energy.
上傳時間： 2013-10-15
上傳用戶：urgdil
I. Introduction This code exploits a previously undisclosed vulnerability in the bit string decoding code in the Microsoft ASN.1 library. This vulnerability is not related to the bit string vulnerability described in eEye advisory AD20040210-2. Both vulnerabilities were fixed in the MS04-007 patch. II. Screenshots $ ./kill-bill.pl . kill-bill : Microsoft ASN.1 remote exploit for CAN-2003-0818 (MS04-007) by Solar Eclipse <solareclipse@phreedom.org> Usage: kill-bill -p <port> -s <service> host Services: iis IIS HTTP server (port 80) iis-ssl IIS HTTP server with SSL (port 443) exchange Microsoft Exchange SMTP server (port 25) smb-nbt SMB over NetBIOS (port 139) smb SMB (port 445) If a service is running on its default port you don t have to specify both the service and the port. Examples: kill-bill -s iis 192.168.0.1 kill-bill -p 80 192.168.0.1 kill-bill -p 1234 -s smb 192.168.0.1
標簽： I. vulnerability Introduction undisclosed
上傳時間： 2015-05-15
上傳用戶：xhz1993
功能最強在的編輯器——vi vi是所有UNIX系統都會提供的屏幕編輯器，它提供了一個視窗設備，通過它可以編輯文件。當然，對UNIX系統略有所知的人，或多或少都覺得vi超級難用，但vi是最基本的編輯器，所以希望讀者能好好把它學起來，以后在UNIX世界里必將暢行無阻、游刃有余，因為其他幾種文本處理器并非UNIX標準配備。說不定別人的Linux機器沒安裝joe或pico，如果您不會vi，那您可能就沒輒了。
上傳時間： 2014-01-11
上傳用戶：tedo811
celestia源代碼，Celestia, a real-time 3D space simulation featuring a database of over 100000 stars, nearly a hundred solar system, objects, and a complete catalog of extrasolar planets.
上傳時間： 2013-12-26
上傳用戶：縹緲
Digitally Controlled HV Solar MPPT DC-DC Converter 規格書，主要用于MMPT算法和DC-DC算法的集成芯片，可供用戶無需編寫算法即可實現太陽能轉換控制器的功能，節省了開發時間和開發成本。
標簽： Controlled Digitally Converter DC-DC Solar MPPT HV 規格書
上傳時間： 2018-03-11
上傳用戶：陳方123789
The rapid growth in mobile communications has led to an increasing demand for wide- band high data rate communications services. In recent years, Distributed Antenna Systems (DAS) has emerged as a promising candidate for future (beyond 3G or 4G) mobile communications, as illustrated by projects such as FRAMES and FuTURE. The architecture of DAS inherits and develops the concepts of pico- or micro-cell systems, where multiple distributed antennas or access points (AP) are connected to and con- trolled by a central unit.
標簽： Distributed Antenna Systems
上傳時間： 2020-05-27
上傳用戶：shancjb
Optical wireless communication is an emerging and dynamic research and development area that has generated a vast number of interesting solutions to very complicated communication challenges. For example, high data rate, high capacity and minimum interference links for short-range communication for inter-building communication, computer-to-computer communication, or sensor networks. At the opposite extreme is a long-range link in the order of millions of kilometers in the new mission to Mars and other solar system planets.
標簽： Communication Wireless Optical Systems
上傳時間： 2020-05-31
上傳用戶：shancjb
Heterogeneous Network (HetNet): A network that consists of a mix of macro cells and low-power nodes, e.g. Pico, Femto, Relay Node (RN) and Remote Radio Head (RRH)
標簽： Efficient Spectrum Energy and
上傳時間： 2020-06-01
上傳用戶：shancjb
The use of renewable energy systems, such as wind power, hydropower, tidal power, solar power, geothermal power and biomass burn is growing. Research in electric power generation from renewable sources is continuously expanding and stands for an area of high technological and financial importance. The implemen- tation of new technologies for the functioning and management of renewable energy systems will help to further develop the renewable energy sector.
標簽： Intelligent Renewable Systems Energy
上傳時間： 2020-06-07
上傳用戶：shancjb
