Experimental device for high-power photovoltaic grid-connected inverter

Abstract

The invention discloses an experimental device for a high-power photovoltaic grid-connected inverter, which comprises a power conversion main circuit, a digital signal processing (DSP) measurement and control system, and an insulated gate bipolar transistor (IGBT) driving module. The DSP measurement and control system samples and calculates a voltage signal and a current signal to obtain a pulse width-adjustable pulse width modulation (PWM) signal sequence, and the IGBT driving module converts the PWM signal sequence into an IGBT signal which can be directly driven; and the power conversion main circuit comprises a reactor, a three-phase synchronous rectifier, a three-phase inverter and a filter reactor. By the invention, more reliable and stable driving can be realized.

Description

technical field [0001] The invention belongs to photovoltaic inverter grid-connected detection test technology, relates to a power conversion and detection control system for distributed new energy grid-connected power supply, in particular to a detection test device for high-power photovoltaic maximum power tracking and island performance detection. Background technique [0002] The development of economy and society has made people's demand for energy continue to rise. The traditional energy utilization structure dominated by non-renewable energy such as petroleum can no longer meet the needs of sustainable social and economic development; on the other hand, the use of traditional energy has serious environmental pollution. question. In stark contrast to traditional energy sources, renewable energy power generation represented by solar energy is clean, pollution-free and inexhaustible. Therefore, making full use of renewable energy to generate electricity and improving th...

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Problems solved by technology

There are many factors here that have affected the development of related technologies, including: 1. The research of high-power photovoltaic inverters requires a large number of solar cells, and high-power experiments require a large number of expensive solar panels. It is also unrealistic for an inverter research and development company; 2. The output characteristics of solar cells vary greatly with external changes, and it is impossible to agree on conditions in advance when performing quantitative experiments such as maximum power detection and anti-islanding performance detection, which brings great difficulties to the optimal design of high-power inverters. Inconvenience

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