摘要
为解决传统静止无功补偿器(SVC)控制系统结构复杂、灵活性差、对硬件依赖较高等问题,将虚拟仪器技术应用到SVC控制系统中。分析并建立了晶闸管控制电抗器(TCR)的数学模型,以NI公司最新发布的虚拟仪器开发软件LabWindows/CVI为开发平台,运用交互式开发技术和ANSI C编程语言,设计并实现了基于虚拟仪器技术TCR控制系统,并将其用于90 kvar/380 V的TCR无功补偿装置中。系统采样负载电压、电流,由FFT算法得到了需要补偿的无功功率,通过在工控机中计算得到了对应该无功功率的晶闸管导通角,再由工控机控制输出相应的触发脉冲,进而调节TCR无功补偿量。运行结果表明,基于虚拟仪器技术的TCR控制器可以用于实时检测电网参数,并在一个周期内准确补偿电网所需无功,具有高度的灵活性和可靠性,充分体现了虚拟仪器技术相对于传统控制器的优点。
In order to solve the problems that the traditional static var compensator（SVC） control system is complicated in structure,lack of agility, and highly dependent on hardware, the virtual instrument technology was applied to the SVC control system. The thyristor control reactor（TCR）mathematical model was analyzed and established. Based on LabWindows/CVI development platform and made use of interactive development technology and ANSI C programming language, the TCR control system was designed and realized, which was used for the 90 kvar/380 V TCR reactive power compensation device. Load current and voltage was sampled, and the reactive power for compensation was calculated by FFT algorithm. The corresponding thyristor conduction angle was calculated by industrial personal computer（IPC）, and the corresponding trigger impulse was output to adjust TCR reactive power compensation quantity. The operation results indicate that TCR controller based on the virtual instrument technology can detect power grid parameters in real time, and accurately compensate for the reactive power in a period with high agility and reliability, which fully reflects the advantages of the virtual instrument technology.
出处
《机电工程》
CAS
2013年第6期737-740,共4页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51177147)
浙江省重点科技创新团队资助项目(2010R50021)
