The Research And Implementation Of The Wireless Communication Network In Wind Farms

Recently, the main operation maintenance personnel of the wind farm by monitoring control and data acquisition (SCADA), to understand the unit running state. SCADA system through a cable to measure and control field equipment, cable monitoring system to is complex, monitoring is limited, when increasing point, the system need to increase the interface and modify the software, the extendable difficulty is larger, the cost of manpower and material resources is higher. Wireless communication in the wind farm is studied in this paper, using ZigBee technology, formed a wireless sensor network. The sensor installed on the spot, through the wireless sensor network (WSN), data which collected by the acceleration, the temperature and humidity data are transmitted to PC, to know the operation of the wind turbine.Based on the technological advantage of ZigBee which is low cost, low power consumption, easily extend. The advantage of wireless communications is taking in this paper. The study focusing on theoretical and applied research, such as network monitoring network topology, design and implementation the wireless communications network nodes and communication protocols, low-power sensor nodes control strategies, etc.According to relevant research and application status about the use of wireless communication technology in the wind turbines, the whole scheme has been made. Proposed the network topology of wind farm wireless monitoring system, and design the monitoring system which containing each Wind power generator for the wind farm. From the perspective of the whole monitoring area, using wireless ZigBee technology, use existing communication networks to build star wireless network for wind farm.Then, this paper introduced the design and implementation of wireless communication network nodes, the main ideas is to achieve the overall structure and each hardware module, proposed coordinator node and sensor node design method for wireless network. Completed the design and implementation of the acceleration acquisition module, temperature and humidity data acquisition module, power management module, PCB module circuit boardThen, according to the wind turbines data acquisition, processing and transmission of the demand for wind farm monitoring network of the wireless communication network, research and analysis the Wireless communication network protocol, using standard C language completed a hardware unit drivers, networking and data transceiver node program to achieve ZigBee wireless communication protocol program. Design a data frame format and hierarchical nested data packet protocol encapsulation temperature and humidity, acceleration of communication, the top gateway converts the data according to TCP/IP protocol, clear design level network protocols, such wireless communication is suitable for wind farms. Wireless modules are widely used in this paper, the module works by battery-power, in order to reduce power consumption, power management strategy is proposed to amend the agreement, extending the normal working hours of the module.Finally, for long-term preservation of the data which collected by the wireless network to facilitate data analysis. Created the database, and interface which connect to windows database.After tested in a wind field of Shanxi for many times, tests showed that the solution of wireless data acquisition system and the design of key wireless communication technologies, including wireless communication network structure, improvement of communication protocols, the power consumption control of wireless data acquisition node and real-time database information exchange for the wind farm in this paper are able to meet the demand of practical application, consistent with the expected results.