CIM Issues #5113
NonlinearShuntCompensator has ambiguity in definition of per section or total
Description
NonlinearShuntCompensator has ambiguity where NonlinearShuntCompensator class has description where it says: "The attributes g, b, g0 and b0 of the associated NonlinearShuntCompensatorPoint describe the total conductance and admittance of a NonlinearShuntCompensatorPoint at a section number specified by NonlinearShuntCompensatorPoint.sectionNumber." This describes total admittance model.
In NonlinearShuntCompensatorPoint.b there is this note: "Positive sequence shunt (charging) susceptance per section." This describes additive admittance model.
These two notes are contradictory. NonlinearShuntCompensatorPoint should be aligned with NonlinearShuntCompensator.
Additive admittance model cannot model variable shunt reactor where admittance is decreasing with increasing section which is problem for conductance (negative conductance is not possible to enter).
Proposed Solution
NonlinearShuntCompensatorPoint should be aligned with NonlinearShuntCompensator.
Proposed change to the NonlinearShuntCompensatorPoint:b bTotal: Positive sequence shunt (charging) susceptance per section. Total positive sequence shunt (charging) susceptance at section noted by sectionNumber.b0 b0Total: Zero sequence shunt (charging) susceptance per section. Total zero sequence shunt (charging) susceptance at section noted by sectionNumber.g gTotal: Positive sequence shunt (charging) conductance per section. Total positive sequence shunt (charging) conductance at section noted by sectionNumber.g0 g0Total: Zero sequence shunt (charging) conductance per section. Total zero sequence shunt (charging) conductance at section noted by sectionNumber.
Decision
NonlinearShuntCompensatorPoint should be aligned with NonlinearShuntCompensator.
Proposed change to the NonlinearShuntCompensatorPoint:
b is replaced with bTotal: Total positive sequence shunt (charging) susceptance at section noted by sectionNumber.
b0 is replaced with b0Total: Total zero sequence shunt (charging) susceptance at section noted by sectionNumber.
g is replaced with gTotal: Total positive sequence shunt (charging) conductance at section noted by sectionNumber.
g0 is replaced with g0Total: Total zero sequence shunt (charging) conductance at section noted by sectionNumber.
Release Notes
Applied the following changes
Change to the NonlinearShuntCompensatorPoint:
b is replaced with bTotal: Total positive sequence shunt (charging) susceptance at section noted by sectionNumber.
b0 is replaced with b0Total: Total zero sequence shunt (charging) susceptance at section noted by sectionNumber.
g is replaced with gTotal: Total positive sequence shunt (charging) conductance at section noted by sectionNumber.
g0 is replaced with g0Total: Total zero sequence shunt (charging) conductance at section noted by sectionNumber.
Modified the description of the NonlinearShuntCompensator to refere to the new attributes
Applied similar changes to the NonlinearShuntCompensatorPhase and NonlinearShuntCompensatorPhasePoint as well
Modified EQ and SC profiles in 61970-452.
Updated by Domagoj Peharda almost 3 years ago
- Proposed Solution updated (diff)
There was a suggestion to change the name of attributes (e.g. from b to bTotal) because change in notes will go unnoticed.
Updated by Domagoj Peharda almost 3 years ago
Updated by Domagoj Peharda almost 3 years ago
Updated by Chavdar Ivanov almost 2 years ago
- Status changed from New to Open
- Solution Version set to CIM18v03
- Solution Applied By set to Chavdar Ivanov
- Completion Date set to 02/11/2023
- Breaking Change set to Yes
- Breaking Change Description changed from Those that have implemented additive model they need to change to Some attributes were renamed.
- Release Notes updated (diff)