Real time PI controller

Question

Adam Klingest 2015-5-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/215170-real-time-pi-controller

评论： Adam Klingest 2015-5-5

Hi

I am doing a project where I have to control a real battery with a PI controller. I have been given some Java and MatLab code, which together implements a new set of MatLab commands, that will directly control the power output of the battery.

With the new commands, I can for example write:

Battery.setP(5)

And the real life battery will be dicharged with 5kW of power, or I can write:

Battery.getACvoltage.getValue()

And I will get the real voltage measurements, from the battery.

But now I want to control the power of the battery automatically with a PI controller. Is there anyway I can do this with simulink? Or do I have to implement the PI controller manually as MatLab code? Because as I see it, simulink does not work in real time, but only simulates a system over a given time period. That is not what I want. I want to measure the real time voltage values, send them trough a PI controller, and then send new power commands to the battery, automatically, and in real time. How can I do this?

I have inserted a sketch of the PI controller

thx.

Regards Adam

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C.J. Harris 2015-5-5

编辑：C.J. Harris 2015-5-5

How can you 'set' the output power of your battery? It's that determined by how much current your circuit is drawing?

Also, if you can already 'set' the power output - what exactly do you want to control?

Adam Klingest 2015-5-5

Well, the battery is connected to the grid. it is not a small battery. i just write the command in matlab and the hardware controller will make sure that the battery inverter delivers the power to the grid. Don't ask me how. i just give the command in matlab, and the hardware controller will make sure that the battery inverter delivers the commanded power. I want to control the voltage at a special node in the grid. this voltage is depended on how much I charge/discharge the battery.

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