What’s New

Changelog for each release.

Release v0.0.9

Release date: December 3, 2018

Changes

  • bug fix in determining voltage deviation in LV stations and LV grid

Release v0.0.8

Release date: October 29, 2018

Changes

  • added tolerance for curtailment targets slightly higher than generator availability to allow small rounding errors

Release v0.0.7

Release date: October 23, 2018

This release mainly focuses on new plotting functionalities and making reimporting saved results to further analyze and visualize them more comfortable.

Changes

  • new plotting methods in the EDisGo API class (plottings of the MV grid topology showing line loadings, grid expansion costs, voltages and/or integrated storages and histograms for voltages and relative line loadings)
  • new classes EDisGoReimport, NetworkReimport and ResultsReimport to reimport saved results and enable all analysis and plotting functionalities offered by the original classes
  • bug fixes

Release v0.0.6

Release date: September 6, 2018

This release comes with a bunch of new features such as results output and visualization, speed-up options, a new storage integration methodology and an option to provide separate allowed voltage deviations for calculation of grid expansion needs. See list of changes below for more details.

Changes

  • A methodolgy to integrate storages in the MV grid to reduce grid expansion costs was added that takes a given storage capacity and operation and allocates it to multiple smaller storages. This methodology is mainly to be used together with the eTraGo tool where an optimization of the HV and EHV levels is conducted to calculate optiomal storage size and operation at each HV/MV substation.
  • The voltage-based curtailment methodolgy was adapted to take into account allowed voltage deviations and curtail generators with voltages that exceed the allowed voltage deviation more than generators with voltages that do not exceed the allowed voltage deviation.
  • When conducting grid reinforcement it is now possible to apply separate allowed voltage deviations for different voltage levels (#108). Furthermore, an additional check was added at the end of the grid expansion methodology if the 10%-criterion was observed.
  • To speed up calculations functions to update the pypsa representation of the edisgo graph after generator import, storage integration and time series update, e.g. after curtailment, were added.
  • Also as a means to speed up calculations an option to calculate grid expansion costs for the two worst time steps, characterized by highest and lowest residual load at the HV/MV substation, was added.
  • For the newly added storage integration methodology it was necessary to calculate grid expansion costs without changing the topology of the graph in order to identify feeders with high grid expansion needs. Therefore, the option to conduct grid reinforcement on a copy of the graph was added to the grid expansion function.
  • So far loads and generators always provided or consumed inductive reactive power with the specified power factor. It is now possible to specify whether loads and generators should behave as inductors or capacitors and to provide a concrete reactive power time series(#131).
  • The Results class was extended by outputs for storages, grid losses and active and reactive power at the HV/MV substation (#138) as well as by a function to save all results to csv files.
  • A plotting function to plot line loading in the MV grid was added.
  • Update ding0 version to v0.1.8 and include data processing v0.4.5 data
  • Bug fix

Release v0.0.5

Release date: July 19, 2018

Most important changes in this release are some major bug fixes, a differentiation of line load factors and allowed voltage deviations for load and feed-in case in the grid reinforcement and a possibility to update time series in the pypsa representation.

Changes

  • Switch disconnecters in MV rings will now be installed, even if no LV station exists in the ring #136
  • Update to new version of ding0 v0.1.7
  • Consider feed-in and load case in grid expansion methodology
  • Enable grid expansion on snapshots
  • Bug fixes

Release v0.0.3

Release date: July 6 2018

New features have been included in this release. Major changes being the use of the weather_cell_id and the inclusion of new methods for distributing the curtailment to be more suitable to network operations.

Changes

  • As part of the solution to github issues #86, #98, Weather cell information was of importance due to the changes in the source of data. The table ego_renewable_feedin_v031 is now used to provide this feedin time series indexed using the weather cell id’s. Changes were made to ego.io and ding0 to correspondingly allow the use of this table by eDisGo.
  • A new curtailment method have been included based on the voltages at the nodes with GeneratorFluctuating objects. The method is called curtail_voltage and its objective is to increase curtailment at locations where voltages are very high, thereby alleviating over-voltage issues and also reducing the need for network reinforcement.
  • Add parallelization for custon functions #130
  • Update ding0 version to v0.1.6 and include data processing v.4.2 data
  • Bug Fixes

Release v0.0.2

Release date: March 15 2018

The code was heavily revised. Now, eDisGo provides the top-level API class EDisGo for user interaction. See below for details and other small changes.

Changes

  • Switch disconnector/ disconnecting points are now relocated by eDisGo #99. Before, locations determined by Ding0 were used. Relocation is conducted according to minimal load differences in both parts of the ring.
  • Switch disconnectors are always located in LV stations #23
  • Made all round speed improvements as mentioned in the issues #43
  • The structure of eDisGo and its input data has been extensively revised in order to make it more consistent and easier to use. We introduced a top-level API class called EDisGo through which all user input and measures are now handled. The EDisGo class thereby replaces the former Scenario class and parts of the Network class. See A minimum working example for a quick overview of how to use the EDisGo class or Usage details for a more comprehensive introduction to the edisgo structure and usage.
  • We introduce a CLI script to use basic functionality of eDisGo including parallelization. CLI uses higher level functions to run eDisGo. Consult edisgo_run for further details. #93.