power-perceiver 2022.9.7

Machine learning experiments to forecast the electricity system (starting with solar)

power_perceiver

Machine learning experiments for forecasting the electricity system (starting with solar)

Installation

Installation with conda

We recommend installing mamba and using mamba env create -f base_environment.yml instead of conda env create -f base_environment.yml.

If installing on a platform without a GPU, then uncomment - cpuonly in base_environment.yml.

conda env create -f base_environment.yml
conda activate power_perceiver

# If training, then also install the dependencies listed in train_environment.yml:
# See https://stackoverflow.com/a/43873901/732596
conda env update --file train_environment.yml --prune

pip install -e .
pre-commit install

If using Ranger21 optimizer then please install Ranger21 with my tiny little patch.

To prevent mamba update --all from trying to replace the GPU version of PyTorch with the CPU version, add this to ~/miniconda3/envs/power_perceiver/conda-meta/pinned:

# Prevent mamba update --all from trying to install CPU version of torch.
# See: https://stackoverflow.com/a/70536292/732596
cudatoolkit<11.6

Installation with pip only

To install the base config, use: pip install -e .

To install the code necessary to train, use: pip install -e .[develop,train]

Data pipelines

There are two different data pipelines:

• power_perceiver.load_prepared_batches: Loads batches pre-prepared by nowcasting_dataset
• power_perceiver.load_raw: Loads raw (well, intermediate) data

Data pipeline for data prepared by nowcasting_dataset

The data flows through several steps, in order:

1. Every PreparedDataSource subclass loads a batch off disk and processes the xr.Dataset using the sequence of transforms passed into the PreparedDataSource's constructor. The processed data for every PreparedDataSource goes into an XarrayBatch. The transforms live in power_perceiver.transforms.<data source name>.py
2. PreparedDataset then processes this XarrayBatch with its list of xr_batch_processors. The xr_batch_processors are processors which need to see across or touch multiple modalities at once while the data is still in an xarray Dataset.
3. Each XarrayBatch is then converted to a NumpyBatch by that PreparedDataSource's to_numpy method. The to_numpy method also normalises, converts units, etc.
4. Finally, PreparedDataset passes the entire NumpyBatch through the sequence of np_batch_processors.

About the name "power perceiver"

Originally, when I started work on "Power Perceiver" 5 months ago, my intention was to use DeepMind's Perceiver IO at the core of the model. Right now, the model actually just uses a standard transformer encoder, not a Perceiver. But I plan to start using a Perceiver IO again within a month or two, when we start using more input elements than a standard transformer encoder can cope with!