How can I simulate no-load saturation of a synchronous machine?

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Matthias 2017-5-22

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回答： Juan Sagarduy 2020-10-26

minimum_saturation_example.zip

I built a minimum example:

1) one synchronous machine pu standard

- Parameters set to an arbitrary preset model

- Saturation on

- Load Flow set to PQ, both set to zero

2) one three phase source

3) one load flow bus

- Voltage set to 1.1 pu

.

I use Powergui Load Flow to calculate the initial state.

Result of Calculation:

- Constant at power-input of machine is zero. That´s OK.

- Constant at exciter input of machine is 1.1. That´s not OK. Due to activated saturation I expect another value. It should be possible to point-wise calculate the no-load saturation curve (which is the input parameter of the saturation of machine) of the machine by adjusting the voltage setpoint of the load flow bus and keeping P=Q=0.

What is my mistake?

Thanks!

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Answer 1

Juan Sagarduy 2020-10-26

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Hi Matthias

I would give this a go with a recent release of Simscape Electrical where we have added load flow analysis and synchronous machines simulate well with open windings.

I am under the impression that your system is over-constrained.

Br Juan