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CIM Issues #5099

Not possible to properly model variable shunt reactor

Added by Eric Stephan about 1 year ago. Updated 10 months ago.

Status:
Open
Priority:
High
Author/Contact Info:
Domagoj Peharda/Domagoj.Peharda@koncar-ket-hr
Base Release:
CIM17
Solution to be Applied To:
CIM18
Solution Version:
Solution Applied By:
Completion Date:
CIM Keywords:
Breaking Change:
No
Breaking Change Description:
CIM Impacted Groups:
WG13, WG14
Requestor:
Domagoj Peharda
Standard(s):

61970-301

Version:
Clause:
Sub-Clause:
Paragraph:
Table:
Originally Closed in Version:
Origination Date:
Origination ID:
Originally Assigned To:

Description

It is not possible to properly model variable shunt reactor which has “Large regulation ranges from 20% to 100%”. ShuntCompensator has implicit range 0% to 100% as only maximum sections are listed, while 0 section (or 0 Mvar) is presumed to be available. For VSR this is not true. Only way for a VSR to have 0 Mvar is to disconnect it using an external switch.


Proposed Solution

Since variable shunt compensator cannot be linear because g=Re(1/(r+jx)) it is enough to specialize the NonlinearShuntCompensator class.
Proposed note for the specialized class VariableShuntCompensator:
A variable shunt compensator is a oil-filled reactor with discrete on-line regulation of reactive power. The regulation range typically varies between 30% and 100% of rated reactive power. When energized VSR cannot have a reactive output of 0 Mvar, so minimal valid section number is 1 with reactive power output at either 100% or at minimal reactive power output (reactive power can raise or fall with increasing section number).

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