Questions tagged [microgrid]

Microgrid is defined as a group of interconnected loads and distributed energy resources within clearly defined electrical boundaries that acts as a single controllable entity with respect to the grid. A microgrid can connect and disconnect from the grid to enable it to operate in both grid-connected or islandmode.

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How do I model a building as a load of a microgrid using Simscape?

I have to build a microgrid in Matlab, and I think the best approch is using Simscape, as part of a bigger project. The problem is that I don't know much of electrical engineering since I study ...
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40 views

How do I design a microgrid using Simulink?

I have to do a project in which I have to model a microgrid which is controlled by using reinforcement learning techniques. In doing so I have a problem, because I study control systems and I don't ...
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MW versus MWh is one total capacity and the other maximum output?

I still don't completely understand MW versus MWh, I have been working on a Wikipedia article for Tesla's "megapack" battery which are measured in both. I assumed one was an indication of how much ...
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Does peak shaving reduce the stress on power lines

I am not an eletrical engineer and have a question about demand side management in smart grids. One application is peak shaving, which means that the maxium power is reduced. Does this decrease the ...
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38 views

Feeding grid transformers via secondary, primary disconnected

I am interested in how transformers are used in the electrical grid, with a view of one day building an isolated "microgrid" for educational purposes. I am however having some difficulty getting some ...
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Why the Photovoltaic(PV) variations may cause shutdown in the main grid

If we assumed that PV generator is connected to the main grid, as the PV depends on solar irradiance it is considered to be a variable source. If the PV source can cause variations that could be ...
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84 views

Using Constant Current Power Supply to control Load Output of a Grid-Tie Inverter

tldr: How do I adjust the power being dumped by my grid tie inverter? Is it possible to use a constant-current power supply to do so? I am planning create a PV system that will help reduce my ...
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32 views

DC Fault Characteristics of a Voltage Source Converter

According to this paper, the three stages in the DC Fault characteristic of a VSC are Capacitor-Discharge State (Natural Response) Diode Freewheeling Stage (When source AC gets disconnected and \$...
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Microgrids in Alaska

I was looking to survey some microgrids and I couldn't get the following information. Are the microgrids commissioned in Alaska DC, AC or a hybrid topology? And is the transmission system used just ...
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257 views

Precise definition of a “radial” electrical distribution system topology

I'm confused about what is meant by "radial" topology of an electrical distribution system. This site claims we can generally group electrical distribution systems into three classes: radial, loop, ...
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Does a supergrid approach confront with distributed generation?

I have heard many times about supergrids and distributed generations (small scales generation connected close to the loads). In a supergrid scenario, a efficient and clean production of electricity (...
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How do I keep DC voltage high in a building grid?

I'm trying to create an off-grid installation. I have 200W PV panels, 20A charge regulator and two 150Ah, 12V batteries in parallel. How can I keep the voltage constant through all the grid in the ...
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619 views

Grid tie inverter on Generator Set

I have a grid tie inverter powered by a 24V battery connected to a circuit that is on a Generator. The grid tie inverter syncs well and outputs 655 – 800W according to the Load. As the load changes ...
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74 views

Addition of step disturbance to a microgrid state space model

If we are having a microgrid model in the state space form as \$\dot{x} = Ax\$ where \$A\$ is complete system matrix.The matrix \$A\$ includes all the active power , reactive power, load currents, ...
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81 views

How is the inverter connected to the grid?

I just finished circuit designing of an inverter which converts 440V DC to 230V AC. Now my manager asked me what kind of connectivity does it has. I answered him: "The current connectivity is AC as ...
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760 views

Can grid-tie inverters charge UPS batteries if connected to the UPS output?

If you have a UPS powering some load in an off-grid situation, and you have a solar panel with a grid-tie microinverter, is it possible to connect the grid-tie inverter to the UPS output, such that ...
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155 views

Feeding energy to the power grid

I am doing a research about the electricity grid and a marketplace where neighbours can trade energy with each other. I found out if your PV cell has excess energy you can with an inverter put it ...
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28 views

Addition of a Disturbance to a Microgrid system

I have a microgrid system which is represented in state space model by \$\dot{\mathbf{x}}= Ax \$. The dimension of \$A\$ is \$32\times32\$ . I want to introduce a step disturbance in one of the ...
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What are those nonlinear loads in real microgrids/grids?

I have read in literature that nonlinear loads can impact on the operation of the so called microgrids. However, when I heard nonlinear loads I think in electronic devices such mobile phones or ...
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570 views

how to design a microgrid

I am working on designing a theoretical microgrid for a school building, but before I can even select theoretical components, I need to select what the structure of my microgrid will be. Here's what ...
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What is interoperability in microgrids?

I have encountered the word "interoperability" in many papers with regards to "microgrids". However, there are no clear explanation for it. What does it exactly mean?