Semi-physical simulation system for offshore full-power wind power converter

Abstract

The invention discloses a semi-physical simulation system for an offshore full-power wind power converter. The semi-physical simulation system comprises an upper computer, a real-time simulation unitand a physical control unit. The upper computer is used for inputting simulation parameters of a wind power converter and outputting a simulation control instruction. A main circuit model of the windpower converter is stored in the real-time simulation unit. And the simulation unit is used for simulating the main circuit model according to the simulation control instruction in the current simulation step length, outputting a first signal corresponding to the current simulation step length to the physical control unit, and simulating the next simulation step length of the main circuit model according to a second signal corresponding to the current simulation step length fed back by the physical control unit. The physical control unit is used for processing the first signal corresponding tothe current simulation step length according to a locally stored control algorithm and a logic algorithm; and the processing result is used as a second signal corresponding to the current simulationstep length, and the second signal is fed back to the real-time simulation unit, so that the real-time simulation unit performs simulation of the next simulation step length according to the second signal.

Description

technical field [0001] The invention relates to the technical field of hardware-in-the-loop simulation of power electronic systems, in particular to a half-object simulation system of a full-power wind power converter at sea. Background technique [0002] Among all new energy sources, wind energy is recognized as the most technologically mature green energy in the world. Wind power includes onshore wind power and offshore wind power. Because the wind speed at sea is higher than that on land and on the shore, and there are few quiet wind periods at sea, offshore wind power generation can make more effective use of the capacity of wind turbines. Therefore, offshore wind power technology is developing rapidly. [0003] As an important device for power conversion, the converter is an integral part of the wind turbine. Due to the different working environments, compared with onshore wind power converters, offshore wind power converters have more and more complex environmental s...

AI Technical Summary

Problems solved by technology

[0007] Carrying out verification research on real offshore wind turbines is a way that can best reflect the real working conditions. The data obtained by using this method is true and reliable, but the investment is huge, and it will also face the loss of other equipment of the unit during the test. There is a certain risk, and there is a quiet wind period, resulting in reduced verification opportunities and extremely low efficiency, so it is not suitable for scientific research on wind power converters

[0008] The current simulation methods for wind power converters usually use simulation software to model the components of wind turbines, transmission systems, and loads, but the parameters of these devices are derived from ideal models and cannot be completely consistent with the actual wind environment. The status under

In addition, since the model is run by software, it cannot accurately reflect the existence of influencing factors such as control signal transmission delay, and the simulation results will have a certain deviation from the actual situation, which will affect the authenticity and accuracy of the simulation

[0009] In addition, due to the limited processing power of the CPU, the events described in the working principle need to be executed sequentially, and there are defects such as delays in pulse sampling calculations, and limited solution steps (the fastest in the existing technology is generally 25 μs), which affects the accuracy of the model solution. Accuracy and Stability

Images