Demand responseProject United Energy Distribution Demand Response
This report documents the major achievements of the project since the release of the last milestone report.
United Energy undertook two separate tests with AEMO.
The objectives of the first test undertaken on 1st December 2017 were to :-
- confirm UE’s demand response reserve capability achieves the required 12MW;
- ensure the ITT (Invitation to Tender) and activation communication channels were operating correctly and acted on within the required period of time of 30 minutes and 10 minutes respectively; and
- validate the suitability and accuracy of the default baselining methodology.
Following the first test (where we estimated that UE had delivered 19MW of demand response by way of voltage reduction), UE and AEMO agreed to undertake a second test for the following reasons:
- The first test revealed that the default baselining methodology was unsuitable for UE’s load shape with demand response numbers calculated by the AEMO baselining method significantly overestimating the level of demand response actually delivered when compared against high frequency metering over the same period; and
- A substantial reduction in ambient temperature midway during the demand response event window resulted in a substantial reduction in electricity demand, making it difficult to determine the demand response contribution due to the voltage reduction compared to the demand response due to the substantial reduction in ambient temperature.
The objectives of the second test undertaken on 16th January 2018 were to :-
- reconfirm UE’s demand response reserve capability achieves the required 12MW; and
- validate the suitability and accuracy of the negotiated baselining methodology.
Further details on the baselining accuracy and renegotiation of the baselining method between UE and AEMO to achieve greater baselining accuracy is discussed below.
In summary, in all of the baselining methods tested, the results of the two tests have confirmed that UE has delivered at least the required 12MW of demand response capability, and that the communication process to receive and accept the ITT, and the subsequent activation of the demand response reserve capability have been successfully demonstrated.