Investigating the cost-effectiveness of flexible resources in a distribution grid to mitigate voltage problems
Challenge and objective
The increased load demand and the variability of renewable energy sources increases the risk of problems in the power system.
This work explores the cost-effectiveness of flexible resources in mitigating voltage problems.
Work performed
Second-order cone OPF has been used to capture voltage change in a MV distribution system (IEEE33).
Flexible resources are considered as cost-curves for load shedding, with marginal cost increase with higher shedding. Different cost-curves have been analyzed.
The framework uses the optimization problem to analyze cost increase of activating flexible resources for increasing voltage.
Significant results
The work shows how flexibility is activated spatially with increasing voltage requirement, and for different cost-curves.
The spatial cost-effectiveness is based on local voltage influence, and the current marginal cost for flexibility.
The results shows what marginal cost of providing flexibility is, which can be incorporated as a market-clearing problem in [Cost/V] to find uniform price for all flexible contributors.
Impact for distribution system innovation
This concept can be used to find the cost-effective activation of flexible resources considering spatial effectiveness, and find the marginal cost for providing flexibility.
The concept is the basis for market clearing considering voltage issues in the grid.
