随着科技的进步，电力电子技术正逐步走向成熟，电子器件的发展也证实了大量

With the advancement of science and technology, power electronic technology is gradually maturing. The development of electronic devices has also confirmed the emergence of a large number of new electronic devices. Equipment related to power electronic devices are widely used in human machinery production and life, like uninterruptible power supplies (UPS), generator, inverter power supply and other power supply devices, these indispensable equipment has also attracted the attention of scientists, of course, which also makes it one of its research and development priorities. And the power performance of these power devices will also affect our quality of life and work quality. We know that if an electronic device is to be used in people's lives, it will go through many rigorous factory tests, and all types of energy equipment will require rigorous testing. The traditional energy testing equipment is an energy consuming equipment, including: passive components, such as resistors, inductors and capacitors, which not only consume energy but also have poor flexibility, most of the energy is emitted in the form of heat. It does not meet the current definition of economic society, so a green energy-saving test system composed of power electronics technology has been established. <br>Based on the development status of power electronic loads at home and abroad, this article clarifies the purpose and significance of the power supply device under study. This paper introduces the characteristics of a PWM converter capable of controlling the phase and amplitude of the input current, controlling it, and can operate in four quadrants to meet the requirements of the device in this article. Put the two PWM converters back to the back and connect them back to back. The central DC line uses a large-capacity stable voltage. The core of the whole device is the front end of the analog load unit. Load simulation current commands are: linear current command and nonlinear current command. The linear current command is to compare and analyze the constant current mode and the constant impedance mode. After comparing the advantages and disadvantages of the two, an optimized constant impedance load current command generation method can be obtained. Then, parameter design and simulation are carried out, and the experimental results must prove the feasibility of the simulation. Finally, based on the simulation of the controller, an experimental platform with its system is built, and the circuit design of the peripheral auxiliary circuit is designed.

With the progress of science and technology, power electronic technology is gradually becoming mature, the development of electronic devices also confirmed the emergence of a large number of new electronic devices, the equipment related to power electronic devices are widely used in human machinery production, life, such as uninterruptible power supply (UPS), generators, and inverter power supply and other power units, these power units this indispensable equipment has also attracted the attention of scientists, of course, it has also become one of its research and development focus. And the good and bad power supply performance of these power units will also affect the quality of our lives and the quality of our work. We know that for an electronic device to be used in people's lives, it takes many rigorous factory tests, and all types of energy equipment require rigorous testing. Traditional energy testing equipment is an energy-consuming device that includes passive components such as resistors, inductors, and capacitors that not only consume energy but also have poor flexibility, with most of the energy dissipated in the form of heat. It does not meet the current definition of economic society, so a green energy-saving test system consisting of electric power electronics technology has been established.<br>Based on the development of electric electronic load at home and abroad, this paper clarifies the purpose and significance of the power supply device studied. This paper introduces the characteristics of a PWM converter that can control the phase and amplitude of the input current, control it, and can operate with four quadrants to meet the requirements of the device in this paper. Put the two PWM converters back into the rear connection, connected back-to-back, the central DC line uses a high-capacity stabilization voltage, and the core of the entire unit is the front end of the analog load unit. Load analog current instructions are linear current instructions and nonlinear current instructions. The linear current command is to compare and analyze the constant current mode and the constant impedance mode, which can obtain an optimized constant impedance load current command generation method after comparing the advantages and disadvantages. Then, parameter design and simulation, the experimental results must prove the feasibility of simulation. Finally, based on the simulation of the controller, the experimental platform with its system is set up, and the circuit design of the peripheral auxiliary circuit is designed.

With the progress of science and technology, power electronic technology is gradually becoming mature. The development of electronic devices has also confirmed the emergence of a large number of new electronic devices. The equipment related to power electronic devices is widely used in human mechanical production and life, Such as uninterruptible power supply (UPS), generator, inverter and other power devices, these power devices, which are indispensable equipment, have also attracted the attention of scientists. Of course, this also makes it one of the focuses of its research and development. And the power performance of these power devices will also affect our quality of life and work quality. We know that if an electronic device wants to be used in people's life, it must go through many strict factory tests, and all types of energy equipment need strict tests. Traditional energy testing equipment is a kind of energy consumption equipment, including: passive components, such as resistance, inductance and capacitance, they not only consume energy but also have poor flexibility, most of the energy is emitted in the form of heat. It does not conform to the current definition of economic society, so a green energy-saving test system composed of power electronics technology is established.<br>Starting from the development of power electronic load at home and abroad, the purpose and significance of the power supply device studied are clarified. This paper introduces the characteristics of a PWM converter, which can control the phase and amplitude of the input current. It can operate in four quadrants and meet the requirements of this device. Put the two PWM converters back to the rear and connect in a back-to-back way. The central DC line uses a large capacity stable voltage. The core of the whole device is the front end of the analog load unit. Load analog current commands include linear current command and nonlinear current command. The linear current instruction is to compare and analyze the constant current mode and constant impedance mode. After comparing the advantages and disadvantages of the two modes, an optimized method of generating constant impedance load current instruction can be obtained. Then, the parameters are designed and simulated. The experimental results must prove the feasibility of the simulation. Finally, based on the simulation of the controller, the experimental platform of the system is built, and the circuit design of the peripheral auxiliary circuit is designed.<br>