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Detecting system and method for virtual synchronous generator grid connection based on hardware-in-the-loop simulation

A semi-physical simulation and detection system technology, applied in the field of virtual grid-connected generator detection systems, can solve problems such as large differences, poor adaptability of conventional test systems, and inability to accurately simulate real power grid frequency changes, and improve the system. economical effect

Active Publication Date: 2017-05-10
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the simulated power grid device uses semiconductor devices, which are limited by the switching frequency and control step size, and cannot accurately simulate the frequency change conditions of the real power grid.
[0005] The conventional test system has poor adaptability in terms of wiring methods and other aspects, and the power generation units of virtual synchronous generators are greatly different from each other due to differences in regions and power supply levels, and the actual equipment often cannot meet the requirements

Method used

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  • Detecting system and method for virtual synchronous generator grid connection based on hardware-in-the-loop simulation
  • Detecting system and method for virtual synchronous generator grid connection based on hardware-in-the-loop simulation
  • Detecting system and method for virtual synchronous generator grid connection based on hardware-in-the-loop simulation

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Effect test

Embodiment 1

[0042] The present invention provides a virtual co-generator grid-connected detection system based on hardware-in-the-loop simulation, such as image 3 As shown, it includes the upper computer, the lower computer emulator, the access device with I / O module, the virtual synchronous generator controller to be tested and the digital oscilloscope connected in sequence. The controller of the virtual synchronous generator to be tested is used to receive the sampling signal, the input signal of the scheduling instruction, and output the PWM pulse wave through program operation and compiling, thereby completing the execution of the control strategy of the virtual synchronous generator to be tested; the digital oscilloscope is used to record The real-time waveform of the voltage and current parameters of the sampling link on the input side of the virtual synchronous generator controller to be tested.

[0043] The upper computer is the main control host of the whole hardware-in-the-loop s...

Embodiment 2

[0049] The present invention also provides a detection method of a virtual co-generator grid-connected detection system based on hardware-in-the-loop simulation, including:

[0050] Edit the mathematical model of the power grid, detect the main circuit model and the virtual synchronous generator unit model through the simulation software on the host computer. After the system is powered on, the normal state and various fault states of the power grid operation are simulated by the simulation software, and the compiled code is generated by the upper computer software and sent to the lower computer emulator. There is an access device with an I / O module, and then the I / O module outputs the state value compatible with the controller of the virtual synchronous generator to be tested to the A / D conversion interface of the controller data acquisition, completing the pre-control flow to the process. The virtual synchronous generator controller to be tested can feed back the generated ...

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Abstract

The invention relates to a detecting system and method for virtual synchronous generator grid connection based on hardware-in-the-loop simulation. The detecting system comprises the following sequentially connected parts: an upper computer, a lower computer simulator, an I / O module, a controller for a virtual synchronous generator to be tested and a digital waveform recorder. The detecting system for virtual synchronous generator grid connection based on hardware-in-the-loop simulation can provide system modeling and simulation for various types of virtual synchronous generators and different types of energy storage units, photovoltaic power generation units and wind turbines of the generators. As a new detecting method for grid connection performance of a power generation unit of a virtual synchronous generator, the detecting method can perform system-level hardware-in-the-loop simulation detection on the basis of completing the mathematical modeling for the virtual synchronous generator to be tested, the integration level is high, and the detecting requirement for grid connection performance of virtual synchronous generators of different voltage levels in the market can be met.

Description

technical field [0001] The invention relates to the technical field of new energy and energy saving, in particular to a system and method for detecting virtual grid-connected generators based on semi-physical simulation. Background technique [0002] With the continuous improvement of the penetration rate of new energy power sources and the gradual reduction of the installed capacity of traditional synchronous generators, the rotating reserve capacity and moment of inertia in the power system are relatively reduced. In addition, the control strategies of grid-connected inverters are different, coupled with the characteristics of fluctuation and uncertainty of new energy power supply, it is difficult to realize its plug-and-play and autonomous coordinated operation, which is very difficult for the traditional synchronous generator theory. The safe and stable operation of the power grid has brought severe challenges. [0003] The new energy power supply of the power electroni...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/367
Inventor 郭重阳夏烈张晓琳李臻徐亮辉杨青斌
Owner CHINA ELECTRIC POWER RES INST
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