new_contents: # reinforcement measures according to dena
  
  
  def parallel_branch(grid, node_target):
      """ Reinforce MV or LV grid by installing a new parallel branch
  
      Args:
          grid: GridDingo object
          node_target: node where the parallel cable (starting from HV/MV substation) is connected to
                       (used when grid is a MV grid)
  
      Returns:
  
      """
      pass
  
  
  def split_ring(grid):
      """ Reinforce MV grid by splitting a critical ring into two new rings
  
      Args:
          grid: MVGridDingo object
  
      Returns:
  
      """
      pass
  
  
  def extend_substation(grid):
      """ Reinforce MV or LV substation by exchanging the existing trafo and installing a parallel one if necessary with
  
      Args:
          grid: GridDingo object
  
      Returns:
  
      """
      pass
  
  
  def new_substation(grid):
      """ Reinforce MV grid by installing a new primary substation opposite to the existing one
  
      Args:
          grid: MVGridDingo object
  
      Returns:
  
      """
subject: move dena grid reinforcement