A high-power grid voltage simulation circuit

Abstract

The invention relates to a high-power grid voltage simulation circuit, which is characterized in that the high-power grid voltage simulation circuit comprises a starting unit, an energy conversion unit, a filter unit and a detection and control system; the starting unit comprises a resistor and a contactor which are mutually connected in parallel, and the two ends of the contactors are respectively connected with a grid voltage input end and the energy conversion unit; the energy conversion unit comprises three single-phase systems and the circuit structure of each single-phase system is divided into a rectification part and an inversion part; the detection and control system is used for simulating a normal working situation and various abnormal working, flickering and fault situations of grid voltage. The high-power grid voltage simulation circuit provided by the invention has the advantages that since the output of simulation quantity through a PWM (Pulse-Width Modulation) rectification and inversion circuit, the actual situation of the grid voltage is genuinely reflected; the demand of simulation tests of high-power products can be met; the structure is simple and the safety and the reliability are high.

Description

technical field [0001] The invention relates to a high-power grid voltage simulation circuit. Background technique [0002] The test platform of the power quality control equipment is composed of a power grid simulation test device, a power quality disturbance generator and a system monitoring part. The following characteristics. At present, there are many studies on the voltage drop simulation device, but less research on the special power grid simulation test device. Some related studies mainly focus on the research of control methods, but few focus on power grid simulation devices. [0003] At present, the research on power grid simulation devices at home and abroad is not systematic, and there are no corresponding standards and specifications. The performance of analog power supplies on the market is incomplete and expensive. These have brought great challenges to the research and testing of power quality control equipment. Inconvenient, so it is necessary to study th...

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Problems solved by technology

[0003] At present, the research on power grid simulation devices at home and abroad is not systematic, and there are no corresponding standards and specifications. The performance of analog power supplies on the market is incomplete and expensive. These have brought great challenges to the research and testing of power quality control equipment. Inconvenient, so it is necessary to study the high-power grid simulation test device

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