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Harmonic Mitigation

Funding mechanismNetwork Innovation Allowance (NIA)
DurationSep 2019 - Mar 2022
Estimated expenditure£425K
Research areaNetwork Improvements and System Operability
  • August 2021

    Work has completed regarding the preparation of the Hardware in Loop (HIL) testing and the executive summary has been drafted and finalised. The executive su…


The main objectives of the project are:

  • Completion of literature review on existing solutions for managing network harmonics.
  • Creation of an algorithm that by controlling each inverter individually is managing the network’s harmonics.
  • Creation of an algorithm that by controlling all inverters in the network is managing the network’s harmonics.


It is expected that due to the increasing number of non-linear devices being connected to the distribution network, the harmonics in the network can become a challenge for Distribution Network Operators (DNOs). Existing solutions for managing harmonics are not suitable for dynamic networks with varying operating conditions or can be very expensive. Therefore, it is important to find alternative solutions in order to be able to manage harmonic levels in the network in a cost effective way.


The aim of this project is to develop an algorithm that can improve the network’s harmonic levels by controlling existing Distributed Generation inverters and will be delivered by Swansea University. As part of this, a number of power system studies will be performed in order to develop, implement the algorithm and test its operation. The algorithm will also be tested in a simulated environment at a university laboratory. This project will provide recommendations as to whether a further project is recommended for the trial of the algorithm in the network. The technical work produced will be reviewed by Power Systems Consultants (PSC).