Voltage-Controlled Current Signal Generator for Solar Array Simulator

Abstract

The invention relates to a voltage controlled current signal generator of a solar cell array simulator. The voltage controlled current signal generator comprises an FPGA (Field Programmable Gate Array) controller, wherein the input / output end of the FPGA controller is connected with the input / output end of a DSP (Digital Signal Processor) controller, and the output end of the FPGA controller is connected with the input end of a D / A (Digital to Analog) converter; the output end of the D / A converter is connected with the input end of a power adjusting circuit through a signal processing circuit; the output end of the power adjusting circuit is respectively connected with the input ends of a current sampling circuit and an address generator; the output end of the current sampling circuit is connected with the input end of the signal processing circuit; and the output end of the address generator is connected with the input end of the FPGA controller. According to the invention, the FPGA controller is used as a master control chip; compared with a single chip microcomputer and the DSP controller, the FPGA controller has extremely high frequency, almost has no signal delay links in a control circuit, and can be used for effectively increasing the dynamic response speed of the system; and the voltage controlled current signal generator has a higher application value in the design of the solar cell array simulator.

Description

technical field [0001] The invention relates to the generation control field of reference signals of a solar battery array simulator, in particular to a voltage-controlled current signal generator of a solar battery array simulator. Background technique [0002] The solar battery array simulator uses the circuit system to simulate the actual desired output characteristics of the solar battery array. The simulation of the characteristics of high-power complex lighting conditions uses a digital solar battery array simulator. The basic circuit topology is shown in figure 1 . Since the output current of the solar cell changes with the change of the output voltage, the design of the solar cell array simulator is essentially to design a voltage-controlled current source, which takes the output current as the control quantity, and performs closed-loop control on the power circuit, so as to realize complex characteristics are accurately simulated. Such as figure 1 As shown, the s...

AI Technical Summary

Problems solved by technology

In order to achieve good closed-loop control and real-time simulation functions, the solar battery array simulator needs accurate sampling, good filtering and complex control methods. Using the above design method, the calculation load of the DSP controller is too large, and the system response speed is slow , the real-time performance is low, and it cannot meet the fast dynamic response requirements of the high-precision output of the solar array simulator, and a new implementation method is required

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