电网监控DCS中的过压自动控制模型的设计

Design of the Overvoltage Automatic Control Model in Power Grid Monitoring DCS

对电网进行分散控制系统(distributed control systems,DCS)设计,实现过压保护,保障电网系统的稳定可靠运行。传统的电网监控DCS中的过压自动控制采用基于电磁耦合补偿的自动增益控制方法,在进行电网监控DCS中的过压自动控制中出现非线性失真,过压保护性能不好。提出一种基于分散控制和匹配滤波检测的电网监控DCS中的过压自动控制模型设计方法。自动控制的主控系统采用ADI公司的ADSP21160处理器系统,抗干扰设计采用FIR带通滤波器,通过PCI总线将过压信息送到DSP,DSP接收后通过D/A转换器输出,经过放大、滤波、阻抗变换实现对过压信息的A/D采样和信号调理,采用philips公司的D类功放芯片--TDA8920BTH构建模拟发射电路,进行了电网监控的过压自动控制的集成设计,实现硬件电路设计和软件开发。系统调试结果表明,该系统能有效实现对电网监控DCS中的过压自动控制,提高了电网监控的过压保护能力,性能优越。

The distributed control system （DCS） is designed for power grid, which can realize overvoltage protection and ensure the stability and reliability of power grid system. The automatic gain control method based on electromagnetic coupling compensation is used in the traditional voltage control system of DCS. The nonlinear distortion is occurred in the overvoltage in the power grid monitoring DCS and overvohage protection performance is not good. An overvoltage automatic control model design method in power grid monitoring system based on distributed control and matched filter detection DCS is proposed. Automatic control system use ADI ADSP21160 FIR filter, overvoltage information is send through the PCI converter after DSP receive, after amplification, filtering, sampling and signal conditioning for overvoltage information, using D class Philips power and software development processor system, anti jamming design use bus to DSP, and output through the D/A impedance converter to achieve the A/D analog transmitter circuit is established by amplifier ehip-TDA8920BTH, the integrate design, hardware circuit design of the overvoltage automatic control in power grid monitoring. System debugging results show that the system can effectively realize the overvoltage automatic control in the power grid monitoring DCS, and improve overvoltage protection caoabilitv, it has superior nerformance.