Direct electric heating system for heating a subsea pipeline comprising - a subsea power cable adapted to be coupled to a three phase electric power source (40, 45) for providing three phase electric power to a subsea location, - two or more subsea direct electric heating modules, each subsea DEH module being provided for heating a different subsea pipeline (21, 22, 23) section of the subsea pipeline, the subsea DEH modules being adapted to be installed subsea at different subsea locations, wherein the subsea DEH module comprises - a three phase transformer, - first electric connections adapted to couple the three phase transformer of the subsea DEH module to the subsea power cable for supplying three phase electric power to the three phase transformer, - second electric connections adapted to couple the subsea DEH module to the respective pipeline section (21, 22, 23) for providing electric power to the pipeline section for heating the pipeline section, and - a symmetrisation unit coupled between the three phase transformer and the second electric connections, - characterised in that - the pipeline section is coupled between a first phase and a third phase of the output of the three phase transformer, wherein the symmetrisation unit comprises a capacitance coupled between the first phase and a second phase of the output of the three phase transformer, and an inductance coupled between the second phase and the third phase of the output of the three phase transformer; wherein the symmetrisation unit is adapted to distribute the electric load of the pipeline section evenly between the three phases of an output of the three phase transformer, so as to achieve a balanced three phase load on the three phase power source; and, - wherein each subsea DEH module further comprises a circuit breaker and a compensation reactor connected between the circuit breaker and the transformer and the reactor is further connected to ground, the reactor being adapted to compensate for reactive power arising from a capacitance of the subsea power cable. - a subsea power cable adapted to be coupled to a three phase electric power source (40, 45) for providing three phase electric power to a subsea location, - two or more subsea direct electric heating modules, each subsea DEH module being provided for heating a different subsea pipeline (21, 22, 23) section of the subsea pipeline, the subsea DEH modules being adapted to be installed subsea at different subsea locations, - a three phase transformer, - first electric connections adapted to couple the three phase transformer of the subsea DEH module to the subsea power cable for supplying three phase electric power to the three phase transformer, - second electric connections adapted to couple the subsea DEH module to the respective pipeline section (21, 22, 23) for providing electric power to the pipeline section for heating the pipeline section, and - a symmetrisation unit coupled between the three phase transformer and the second electric connections, - characterised in that - the pipeline section is coupled between a first phase and a third phase of the output of the three phase transformer, wherein the symmetrisation unit comprises a capacitance coupled between the first phase and a second phase of the output of the three phase transformer, and an inductance coupled between the second phase and the third phase of the output of the three phase transformer; wherein the symmetrisation unit is adapted to distribute the electric load of the pipeline section evenly between the three phases of an output of the three phase transformer, so as to achieve a balanced three phase load on the three phase power source; and, - wherein each subsea DEH module further comprises a circuit breaker and a compensation reactor connected between the circuit breaker and the transformer and the reactor is further connected to ground, the reactor being adapted to compensate for reactive power arising from a capacitance of the subsea power cable.