As well as the other answers here, you can control flows around grids by using a special arrangement of transformer to shift the phase of the signal. See: https

As well as the other answers here, you can control flows around grids by using a special arrangement of transformer to shift the phase of the signal. See: https://en.wikipedia.org/wiki/Quadrature_booster https://en.wikipedia.org/wiki/Quadrature_booster and here is a commercial example: https://www.siemens.com/global/en/home/products/energy/high-voltage/transformers/phase-shifting-transformers.html https://www.siemens.com/global/en/home/products/energy/high-...