On May 20, 2021, at 5:47 AM, Bruce Nordman <bnordman@...> wrote:

Tadashi--

   Thanks for putting this together.  My replies below.

On Thu, May 20, 2021 at 12:07 AM Tod Morita <todmaplemorita@...> wrote:

Dear Shuli and James,

I summarized my proposal.

--------------------------------------------------------------------------------------------------------------------------

In scope:

• Define main-grid connected Microgrid control mechanism

Is this is the mechanism for the microgrid to coordinate with the utility grid, or for how the microgrid operates internally? Should do both, no? For the internal MG system, the grid looks like just another (somewhat special) resource.

• Entity in the microgrid are generators and loads (including storage, which is both at different times)

Isn't there a third type of entity that is a 'grid controller' box? There’s the controller and the controlled. Is this distinction useful?

• Exchange power between microgrid to microgrid and main-grid

Is this to be special to microgrids, or is the mechanism to be the one used by any customer of the utility grid? Only difference between MG and any other grid user is the ability to island, right? Don’t we want an architecture that’s generalizable to all grid users?

• Do not conflict with main-grid control parameters such as voltage and frequency

Out of scope

• Inter-entity control within the microgrid (It’s depend on the device manufacture)

This would cover the behavior of loads and of generators? I think you mean “intra-entity” correct?

Hardware architecture 

• Introducing microgrid configuration inverter between main-grid and microgrid
• Utilize smart meter for power measurement 
• Set edge device to communicate with inverter smart meter and Hyphae or DSO

Other than a transfer switch to electrically separate the microgrid from the grid, are there any differences between Hyphae and a non-microgrid customer?

Thanks,

--Bruce 

Microgrid configuration inverter functions

• Follow voltage and frequency with main-grid and supply/receive power by battery from/to the microgrid
• Set constant current for main-grid when connected

Hyphae communication

• Readout inverter condition and battery SoC
• Readout smart meter information
• Set current and phase to inverter

 --------------------------------------------------------------------------------------------------------------------------

BR

Tadashi

2021/05/13 4:28、Shuli Goodman <sgoodman@...>のメール:

Hi Tadashi and James, I was reading through my mail. I think where you are going is great and could benefit from formal agreement.

What do you think about the two of you leading us in the next steps building on Kotaro and my slides? Last session I think we were trying to define scope. Now we can move onto functions. You both captured this nicely.

Documentation can be found here: https://wiki.lfenergy.org/display/HOME/Microgrids+SIG

Deck with the scope and 3 design principles can be found here: https://docs.google.com/presentation/d/1s-2VpeE-LzN29XWQnEy0f5fQ33uwlb2cHmgkOriYxVo/edit?pli=1#slide=id.gafe7ca7d45_1_69

Kotaro's deck can be found here: https://drive.google.com/file/d/1LOkV2rZz2zXqdhAbz0dHGoKqHc7z3kBr/view?usp=sharing

Please let us all know.

Thanks,

Shuli

l. shuli rose goodman phd.

executive director, LF Energy
a Linux Foundation project

web: https://lfenergy.org

twitter: @LFE_Foundation

linkedin.com/in/shuligoodman
c: +1.415.722.9688
v: +1.707.874.3231

+++++++++++++++++++++++++++

Schedule a meeting

+++++++++++++++++++++++++++

The future of energy is shared technology innovation 

+++++++++++++++++++++++++++

Hi! James,

I completely agree the definition you provided for the microgrid.

Big issue on microgrid is a transition of main-grid connection and disconnection.

Using breaker or back-to-back converter for separation form main-grid will generate imbalance transition.

I added additional entity on your document.

Let get started the discussion of microgrid architecture.

Tadashi Morita

2021/04/10 12:20、James Kempf <kempf42@...>のメール:

Prompted by Bruce's comment yesterday that I should write up my proposed architecture, I found some time today to do so. Slides attached.

Please send any feedback when you have time, or we could meet during the break at the LF Energy Summit on Wed.

Thanx.

              jak

<MicrogridArchitecture0409-2021.pptx>

<MicrogridArchitecture0415-2021-TM.pptx>

--

Bruce Nordman
Lawrence Berkeley National Laboratory
nordman.lbl.gov
BNordman@...

510-486-7089; m: 510-501-7943

2021/05/13 4:28、Shuli Goodman <sgoodman@...>のメール:

Hi Tadashi and James, I was reading through my mail. I think where you are going is great and could benefit from formal agreement.

What do you think about the two of you leading us in the next steps building on Kotaro and my slides? Last session I think we were trying to define scope. Now we can move onto functions. You both captured this nicely.

Documentation can be found here: https://wiki.lfenergy.org/display/HOME/Microgrids+SIG

Deck with the scope and 3 design principles can be found here: https://docs.google.com/presentation/d/1s-2VpeE-LzN29XWQnEy0f5fQ33uwlb2cHmgkOriYxVo/edit?pli=1#slide=id.gafe7ca7d45_1_69

Kotaro's deck can be found here: https://drive.google.com/file/d/1LOkV2rZz2zXqdhAbz0dHGoKqHc7z3kBr/view?usp=sharing

Please let us all know.

Thanks,

Shuli

l. shuli rose goodman phd.

executive director, LF Energy
a Linux Foundation project

web: https://lfenergy.org

twitter: @LFE_Foundation

linkedin.com/in/shuligoodman
c: +1.415.722.9688
v: +1.707.874.3231

+++++++++++++++++++++++++++

Schedule a meeting

+++++++++++++++++++++++++++

The future of energy is shared technology innovation 

+++++++++++++++++++++++++++

Hi! James,

I completely agree the definition you provided for the microgrid.

Big issue on microgrid is a transition of main-grid connection and disconnection.

Using breaker or back-to-back converter for separation form main-grid will generate imbalance transition.

I added additional entity on your document.

Let get started the discussion of microgrid architecture.

Tadashi Morita

2021/04/10 12:20、James Kempf <kempf42@...>のメール:

Prompted by Bruce's comment yesterday that I should write up my proposed architecture, I found some time today to do so. Slides attached.

Please send any feedback when you have time, or we could meet during the break at the LF Energy Summit on Wed.

Thanx.

              jak

<MicrogridArchitecture0409-2021.pptx>

<MicrogridArchitecture0415-2021-TM.pptx>

--

2021/04/10 12:20、James Kempf <kempf42@...>のメール:

Prompted by Bruce's comment yesterday that I should write up my proposed architecture, I found some time today to do so. Slides attached.

Please send any feedback when you have time, or we could meet during the break at the LF Energy Summit on Wed.

Thanx.

              jak

<MicrogridArchitecture0409-2021.pptx>

2021/04/10 12:20、James Kempf <kempf42@...>のメール:

Prompted by Bruce's comment yesterday that I should write up my proposed architecture, I found some time today to do so. Slides attached.

Please send any feedback when you have time, or we could meet during the break at the LF Energy Summit on Wed.

Thanx.

              jak

<MicrogridArchitecture0409-2021.pptx>