`  == Electric Power ==  ``A HVDC back-to-back station with a maximum transmission rate of 40 megawatts was built at Broken Hill in 1986. It consists of 2 static inverters working with a voltage of 8.33 kV. After this station was operational the two other power stations closed and their equipment was gradually removed.``  An HVDC back-to-back station merely connects two stations (either on different frequencies or at least not phase-locked).  It does not produce any power.  The first part of the section on Electric Power implies that by the 1980s there were only two stations left, and states that these were connected ``as a grid`` i.e. phase-locked and directly connected.  What stations did the HVDC back-to-back system connect? and which stations were then demolished?   `