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CIM Issues #4043

HydroPump Cardinality A HydroPowerPlant must include at lea

Added by Herbert Falk over 2 years ago.

Status:
Closed
Priority:
Normal
Author/Contact Info:
ENTSO-E
Base Release:
61970cim15v12
Solution to be Applied To:
61970cim16v10
Solution Version:
CIM16
Solution Applied By:
KLH
Completion Date:
06/20/2012
CIM Keywords:
Breaking Change:
No
Breaking Change Description:
CIM Impacted Groups:
WG13
Requestor:
Standard(s):
Version:
Clause:
Sub-Clause:
Paragraph:
Table:
Originally Closed in Version:
CIM16
Origination Date:
05/22/2012
Origination ID:
13_109
Originally Assigned To:

Description

HydroPump Cardinality
A HydroPowerPlant must include at least one HydroPump. As you can see in the picture below, this is stated by cardinality 1.* on the highlighted association end near to HydroPump class. But we think that there are real situations where a hydro plant doesn't contain any hydro pump. So the cardinality should be 0.*. On the other end of association our question is similar. In fact, ?we think that a hydro pump can exist only inside a hydro power plant. So the relationship 0..1 should be changed to 1.1.
(Additional information 4-June2-2012) Statnett has HydroPowerPlants that consist only of HydroPumps. The current CIM model requires a HydroPowerPlant to have 1..* HydroGeneratingUnits. This needs to be 0..* to work with Statnett's case.

Proposed Solution

Change cardinality between HydroPowerPlant and HydroPump to be 0..* at the HydroPump and 1 at the HydroPowerPlant.

Decision

2012-5-30 - Agreed to change cardinality at HydroPump to 0..*. Didn't discuss cardinality at HydroPowerPlant.
2013-6-13 - Agreed to leave the cardinality between HydroPowerPlant and HydroPump as it is (0..1) because it is more flexible and can always be restricted in a particular profile. Agreed to change the cardinality between HydroPowerPlant and HydroGeneratingUnit to 0..* at the HydroGeneratingUnit side and also to change the cardinality at the HydroPowerPlant side from 1 to 0..1. With these changes the cardinality matches the cardinality for HydroPump.

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