一种新型强油循环风冷变压器冷却自控装置的研制

Development of a new cooling control device for forced oil-circulated air-cooled transformer

分别从控制系统的硬件结构、软件设计及装置实现的功能等 3个方面进行了论述。装置以变压器的负荷、油面温度与温度变化率相结合的控制策略进行冷却器的综合投切控制 ,以冷却器组的累计运行时间基本均衡为原则进行冷却器组循环控制。叙述了具有冷却器组自动投切定位功能的投入 /切除模块的程序结构。装置还具有完善的保护功能、手动 /自动功能、故障定位功能、信息显示功能、故障报警与跳闸功能等。实际运行表明 ,该装置运行可靠 ,控制准确 ,功能完善 ,并具有显著的节能效果。

The system HW & SW design and the functions implemented of a new cooling control device for forced oil circulated air cooled transformer are introduced.The comprehensive switching control is carried out by the control strategy of combining transformer load with transformer temperature and the change rate of temperature.The cyclic operation of cooling unit group is controlled by the principle of accumulated operating time balance.The program structure of switching module is explained,which has the automatic assignment function of cooling unit group switching.The device has other functions,such as protection,manual/automatic mode,fault locating,information display,fault alarming,fault tripping and so on.Its site operation shows that the device is of high operation reliability and control accuracy,has perfect functions and notable effect of power saving.