Stand-Alone Excited Synchronous Wind Power Generators with Supervisory Control and Database Analysis System

• Main Authors: Po-sung Hung, 洪柏嵩
• Other Authors: Tzuen-Lih Chen
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/19482352443344062420

碩士 === 國立中山大學 === 電機工程學系研究所 === 104 === This thesis designs and implements two parts of Graphical User Interface(GUI) which bases on Visual Studio C#. One is used for communication between computer and Microcontroller Unit (MCU) F28069 regarded as Human Machine Interface (HMI), and the other is used for Query which calls Query Interface. HMI provides SQL database storage and is able to monitor the excited synchronous wind power system by Universal Asynchronous Receiver/ Transmitter (UART) which is used in conjunction with RS-485 communication standard. In order to improve the reliability of data and communicate efficiently, we design specific packet which refers to Modbus protocol. There are four pages in the top half and an operational area in the bottom half of HMI. These four pages includes “Status Confirmation”, “Parameter Setting”, “Graph Monitoring”, and “Numeric Monitoring”. “Status Confirmation” ensures all equipment are in matching condition; “Parameter Setting” reads and writes PID parameters of control strategies in the wind power system; “Graph Monitoring” shows voltage and current signal in the left oscilloscope, and displays all kinds of power in the right oscilloscope; “Numeric Monitoring” shows numerical information of wind power system in detail. This operational area collocates with the “Graph Monitoring” to show numerical data in term of graphical data, analyzes power factor (PF) and total harmonic distortion (THD), and changes excited generator of control mode. The feasibility of HMI is confirmed by experimental results. Query Interface on the basis of SQL database contains “Dynamic Query”, “Data Table”, and “Data Analysis” page. “Dynamic Query” features three time-selected searching method which are trigger by scrolling the timeline, choosing item of the drop-down menu, and clicking on the power chart. Convenient mechanisms make searching condition change easily, so every numerical and graphical data is able to update fast, bringing a dynamic vision. “Data Table” in form of Excel table shows the searching data sequentially. “Data Analysis” calculates power of all equipment in time-selected condition and analyzes power quality. Query Interface provides evaluation function which assists the system to adjust optimal parameters.