基于dsPIC单片机和MCP3909的智能无功补偿控制器设计

传统无功补偿装置补偿控制精度低，功能单一，电容器投切过程易产生较大的涌流，引起系统过电压。为此，设计了新型的智能无功补偿控制器，配合零投切复合开关完成低压配电无功补偿相应功能。控制器硬件上采用dsPIC33F系列处理器和高精度模数转换芯片MCP3909构成，软件上采用准同步采样算法对电网参数进行采集和计算。经试验测试，该设计能够精确控制，分级补偿，过零投切，对系统无功功率进行有效补偿，显著提高功率因数。

Design of Intelligent Reactive Power Compensation ControllerBased on dsPIC and MCP3909

Due to the low precision and single function of the traditional reactive power compensation device, the capacitor switching process tends to produce large inrush current, causing the system overvohage. To address this problem, this paper designs a new intelligent reactive power compensation controller to help the zero-cross-switching complex switch realize the LV distribution reactive compensation. The hardware of the controller adopts dsPIC33F processor and high precision analog-to-digital converting chip MCP3909, and the software uses the quasi- synchronous sampling method for collection and calculation of the power grid parameters. The test results show that this reactive power compensation can be accurately controlled hierarchically compensated, capable of zero-cross-switching. The system can significantly improve the power factor.