Virtual Intertia in Power Systems

In summary, the conversation discussed the concept of "virtual inertia" in relation to photovoltaics and power converters. The article mentioned explains how PV modules, which have no inertia on their own, can introduce virtual inertia to the grid when connected with an energy storage device like a battery. This concept may be difficult for someone with a mechanical background to understand, but the abstract of the article provides an explanation of how batteries and smart controls can simulate the behavior of a power plant with inertia.
  • #1
OliskaP
38
7
Hi again PF.

I recently came across the term "virtual inertia" when reading about photovoltaics and power converters (DC/DC, DC/AC etc.). Article: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6953370, not sure if people are able to view the article, I have access via university library.

I have problem understanding the term virtual inertia, PV modules themselves have no inertia, but when connected together with a energy storage device, a battery for example, can introduce virtual inertia to the grid, how?

My background is from mechanical, just started learning electrical engineering. So from a mechanical background I have trouble understanding how the setup mentioned above can introduce inertia without any rotating parts, hence virtual inertia.
 
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  • #2
The abstract explains it. They propose to use batteries and smart controls to make the PV installations simulate the behavior of a power plant that really does have inertia.
 

1. What is virtual inertia in power systems?

Virtual inertia refers to the concept of mimicking the effects of physical inertia in power systems through the use of software and control algorithms. It is used to maintain the stability and frequency of the power grid, especially in systems with a high penetration of renewable energy sources that do not have inherent inertia.

2. How does virtual inertia work in power systems?

Virtual inertia works by using control algorithms to monitor and adjust the frequency of the power system. This is done by mimicking the behavior of physical inertia, which helps to stabilize the grid during sudden changes in power supply or demand. By adjusting the frequency, virtual inertia helps to maintain a balance between the power generated and the power consumed in the grid.

3. What are the benefits of using virtual inertia in power systems?

The use of virtual inertia in power systems provides several benefits, including improved grid stability, increased integration of renewable energy sources, and reduced reliance on traditional power plants. It also allows for faster response times to changes in power supply or demand, leading to a more efficient and reliable power grid.

4. Are there any limitations or challenges associated with virtual inertia in power systems?

One of the main limitations of virtual inertia in power systems is the need for accurate and reliable control algorithms. Any errors or glitches in the software can have significant impacts on the stability of the grid. Additionally, the implementation of virtual inertia requires advanced technology and may be costly for some power systems.

5. How is virtual inertia being used in power systems around the world?

Virtual inertia is being increasingly used in power systems around the world, especially in countries with high levels of renewable energy integration. For example, Australia has implemented virtual inertia in its power systems to help stabilize the grid and reduce the risk of blackouts. Other countries, such as Germany and Japan, are also exploring the use of virtual inertia to support their transition towards a more sustainable energy future.

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