海岛可再生独立能源电站能量管理系统

Energy Management System of Renewable Stand-alone Energy Power Generation System in an Island

建立可再生独立能源电站是解决无电网海岛的能源短缺问题,并促进这些地区经济发展的重要举措。文中介绍了珠海市担杆岛研建的一个风能、太阳能、波浪能3种可再生能源以及备用柴油机组成的混合发电站。采用了海水淡化装置作为可控负载,在可再生能源能流密度较大、电力过剩或淡水紧缺时,投入海水淡化装置,利用多余的电力制造淡水,解决海岛淡水不足的问题。为了更合理地管理能量,设计了基于上、下位机的可再生独立能源电站的能量管理系统。该系统对蓄电池的电压和电流信号进行实时监测,以此估算蓄电池的储能状态,对能流进行控制,并利用全球移动通信系统(GSM)模块TC35i,把电站的状态信息发送到相关人员的手机上。运行结果显示,能量管理系统提高了可再生能源的利用率,延长了蓄电池的使用寿命,为海岛独立能源发电站的高效、稳定运行提供了有力的保障。

The shortage of energy restricts the economical development of the remote areas and islands where the grid extension is expensive and difficult. Moreover, fuel price has been increasing drastically over the past decades, as a result, stand-alone renewable energy hybrid power generation stations have become a solution to solve the energy shortage difficulties in those areas. Hybrid energy power generation becomes more popular all over the world. A renewable energy hybrid power generation system including wind energy, solar energy and wave energy, was established in Dangan Island, Zhuhai City by Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, and is supplying power for the residents in the island. A desalination plant in the system is standing by as a load, which will be switched on when the power is excess, or when there is a shortage for fresh water supplies. The excess power can be used to desalinate sea water to supply fresh water for the island. An energy management system of hybrid energy power generation based on a main-subordinate unit is designed to manage energy more effectively. This system samples the voltage and the current signal of battery, assesses the status of the battery, controls the energy flow, and sends massages to the persons concerned by a GSM module （TC35i）. The running results show that the energy management system increases the utilization of renewable energy, and extends the service life of the batteries. It also provides a reliable guarantee for the efficient and stable operation of the stand-alone system.