The NMS Series photovoltaic inverter adopts an advanced DSP+FPGA dual-processor collaborative control architecture, which perfectly integrates the high-speed real-time processing capability of Digital Signal Processor (DSP) and the flexible parallel logic control advantage of Field Programmable Gate Array (FPGA). This innovative control scheme breaks through the performance bottleneck of traditional single-processor inverters, significantly improves the response speed, control accuracy and operation stability of the whole machine, and provides a strong core support for the efficient and reliable conversion of photovoltaic energy.

In the dual-processor system, DSP undertakes the core tasks of high-speed algorithm operation and energy management optimization. It is responsible for the realization of high-performance maximum power point tracking (MPPT) algorithm, grid-connected current closed-loop control, active and reactive power regulation, and islanding detection. With powerful floating-point computing capacity, DSP can quickly process a large number of real-time sampling data of voltage and current, optimize the control strategy in real time, ensure that the inverter always operates at the optimal power point, and maximize the utilization rate of photovoltaic power generation. At the same time, it completes the system-level energy scheduling, fault diagnosis and logic judgment, ensuring the efficient coordination of various functional modules of the inverter.

FPGA acts as the high-speed logic control center and hardware acceleration unit of the system. It is mainly responsible for the parallel processing of multi-channel pulse width modulation (PWM) signals, high-speed signal acquisition, fast logic protection and I/O port real-time control. Different from the serial execution mode of DSP, FPGA can realize multi-task parallel computing, which greatly shortens the signal delay and control response time. It can generate high-precision PWM drive signals to drive power switching devices, so that the output current has high sinusoidal purity and low harmonic distortion rate (THD). In terms of safety, FPGA can realize ultra-fast overvoltage, overcurrent, overheating and other fault protection actions, and quickly cut off the fault circuit within microseconds, effectively protecting the safety of power devices and loads.

The collaborative operation mechanism of DSP+FPGA dual processors makes the NMS Series PV inverter have obvious technical advantages. In terms of dynamic response, the dual-processor architecture greatly shortens the system delay, and can quickly track the fluctuation of illumination and load changes, ensuring the smooth and stable output of electric energy. In terms of control accuracy, the high-precision algorithm of DSP combined with the high-speed logic processing of FPGA effectively reduces the grid-connected harmonic content, improves the power factor, and meets the strict grid-connected standards at home and abroad. In terms of system scalability, FPGA’s programmable feature facilitates the subsequent upgrading of control functions and the expansion of hardware interfaces, enabling the inverter to adapt to different application scenarios and technical iteration requirements.

In addition, the dual-processor scheme also enhances the anti-interference ability and reliability of the inverter. Through the reasonable division of labor and mutual monitoring between DSP and FPGA, the risk of system crash or control failure caused by single processor abnormality is reduced. Even under complex and harsh working conditions such as strong electromagnetic interference and large temperature changes, the inverter can still maintain stable and reliable operation, reduce the failure rate and later operation and maintenance costs.

In practical engineering applications, the NMS Series PV inverter based on DSP+FPGA dual-processor control shows excellent performance. It has higher power generation efficiency, faster dynamic response speed and more perfect protection functions, which can not only improve the overall power generation capacity of photovoltaic power stations, but also extend the service life of the inverter. Whether it is a small-scale distributed rooftop photovoltaic system or a medium-sized commercial and industrial photovoltaic power station, this control scheme can provide stable and efficient energy conversion support, helping users obtain greater economic benefits.

In the context of the rapid development of the global photovoltaic industry, the control technology of inverters is constantly advancing. The DSP+FPGA dual-processor architecture adopted by the NMS Series PV inverter represents the development trend of high-end photovoltaic inverter control technology. It not only enhances the core competitiveness of products, but also provides a reliable technical guarantee for the efficient utilization of photovoltaic energy, the stable access to the power grid and the large-scale popularization of photovoltaic systems, making positive contributions to the development of the global clean energy industry.