摘要
提出一种DSP和现场可编程门阵列(FPGA)双CPU结构的新型单相光伏并网控制方案。DSP负责基于压频转换器的高精度数据采集、最大功率点跟踪算法和电压控制环,并将计算出的最大功率点跟踪电流通过串行外围设备接口(SPI)通信方式传送给FPGA;FPGA负责新型电网电压数字锁相环算法、电流环无差拍控制和正弦脉宽调制(SPWM)驱动算法,并通过光耦HCPL-316J驱动电路控制逆变器各桥臂开关的通断。该方案被应用于一台5 kW单相光伏并网逆变器中。实验表明:该控制器集DSP快速运算性能和FPGA的高可靠性于一体,并网运行性能好。
A single-phase PV（PhotoVohaic） grid-connection control scheme based on DSP and FPGA（Field -Programmable Gate Array） is proposed. The DSP is responsible for the voltage-frequency-conversion-based high-accuracy data acquisition,MPPT（Maximum Power Point Tracking） and voltage control loop. It transmits the calculated MPPT current to FPGA via serial peripheral interface. FPGA is responsible for the grid -voltage digital phase-locked loop,current deadbeat control and SPWM drive algorithm. It controls the on-off of inverter arm switches via the drive circuit based on HCPL-316J optical coupler. The proposed scheme is applied to a 5 kW single-phase PV grid-connected system and experiments show that,the controller integrates the fast computing capability of DSP with the high reliability of FPGA,resuhing in excellent grid-connected operating performance.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第2期84-89,共6页
Electric Power Automation Equipment
关键词
单相光伏并网
现场可编程门阵列
压频转换
数字锁相环
驱动电路
single-phase photovohaic grid-connection
field-programmable gate array
voltage-frequency conversion
digital phase-locked loop
drive circuit
