Oahu Wind Integration Study - Hawaii Natural Energy Institute ...

In parallel with the data collection efforts for the scenario analysis, the project team held several
meetings to develop a strategy to conduct the study. Several decisions allowed the team to
reduce the list of scenarios from five to three. First, the team determined that Scenarios 1 and 2
should be combined to analyze all on-island renewable resources (a potential scenario prior to
construction of the off-island wind plants and HVDC cable system). Second, the team
determined that Scenario 5 should be the first scenario to be considered. It was anticipated that
this scenario could potentially challenge the limits of the electrical system model as well as the
modeling tools, enabling the team to identify constraints and resolve these constraints in the
modeling tools. A successful simulation of Scenario 5 would help to eliminate other scenarios
with smaller renewable energy penetration, such as Scenario 2. This allowed the project team to
focus on analyzing strategies for Scenarios 5 and 3 that could address the challenges of
integrating very high levels of wind power, while still meeting the study objectives. The project
team agreed on the following scenarios:
1. Scenario 1 – 100 MW wind and 100 MW solar on Oahu
2. Scenario 3 – 100 MW wind and solar on Oahu, 400 MW wind on Lanai
3. Scenario 5 – 100 MW wind and 100 MW solar on Oahu, 200 MW wind on Molokai and
200 MW wind on Lanai
The contents of the report are described in the following paragraphs. In Section 4.0 the
objectives of the study are outlined and information is provided about the modeling tools and
study assumptions.
In Section 5.0 the details and limitations of each modeling tool is provided. In Section 5.1, the
GE models used for this study are described. Five tools were assembled for this study; two of
which are classical power system analysis tools, while the other three were developed or
modified specifically for this study. This section of the report highlights the advancements to the
GE models that were needed in order to capture the unique operating conditions of the Oahu
power system, which is electrically smaller than systems that this GE team has analyzed in other
studies. In Section 5.2, the baseline model development process and results are summarized. In
Section 5.2.2 the results of the Baseline scenario and three high wind scenarios are presented.
These high wind scenarios formed the basis for which the strategies to increase wind energy
delivered were built upon.
In Sections 6.1 and 6.2, the preparation of all data for the models is described. This includes the
wind power data, wind power forecasting data, and solar power data analysis efforts, as well as
the analysis of wind power variability data as it pertained to defining system reserve
requirements. In Section 6.3 a detailed overview of the model development, validation and
calibration effort is provided. In Section 6.4 the results of Scenario 1 are presented. In Section
6.5 the results of Scenario 5 are presented, and in Section 6.6 the results of Scenario 3 are
presented.
In Section 7.0, strategies to enhance system operation, reduce wind plant curtailment and reduce
system-wide variable cost are examined. This section describes the results of the GE MAPS TM
production cost simulations. The objectives of the study are outlined in Section 7.1. The results
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