CIM Issues #5099: Not possible to properly model variable shunt reactor - WG13 Issues - UCAIug Issue Tracking System

CIM Issues #5099

Not possible to properly model variable shunt reactor

Added by Eric Stephan over 1 year ago. Updated about 1 year 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:

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).