A power packet generation device configured to generate power packets to be supplied to a plurality of loads (4A,4B), from electric power supplied from at least one DC power source (1A,1B), and transmit the generated power packets to a main transmission line (L1, L11, L21) so that target voltages are applied to the respective loads (4A,4B), the power packet generation device comprising: a plurality of switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D, 292,514A,514B,516A,516B,521A,521B) respectively interposed in a plurality of sub transmission lines (L2, L3, L12, L13, L22, L23) each connecting the DC power source (1A,1B) to the main transmission line (L1, L11, L21), the plurality of switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D,292,514A, 514B,516A,516B,521A,521B) being connected in parallel to the main transmission line (L1, L11, L21); a plurality of packet generators (28A,28B) configured to generate the power packets by causing the switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D, 292,514A,514B,516A,516B,521A,521B) to perform ON/OFF operation, based on differences between the target voltages, and voltages estimated as being applied to the respective loads (4A,4B) in each of a first state where the power packets are supplied to the loads (4A,4B) and a second state where the power packets are not supplied to the loads (4A,4B); and a selector configured to perform switching between a state where the packet generators (28A,28B) cause the switches (21A,21B,221A,221B,221C,221D,231A,231B, 231C,231D,292,514A,514B,516A,516B,521A,521B) to perform ON/OFF operation, and a state where the packet generators (28A,28B) maintain the switches (21A,21B,221A,221B,221C,221D, 231A,231B,231C,231D,292,514A,514B,516A,516B,521A,521B) in their OFF states characterised in that the plurality of packet generators (28A,28B) are provided so as to correspond to the plurality of switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D,292,514A, 514B,516A,516B,521A,521B), respectively, and the selector sets any one of the plurality of packet generators (28A,28B) in a generation state where the packet generator (28A,28B) generates the power packet by causing the switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D,292,514A,514B,516A, 516B,521A,521B) to perform ON/OFF operation, and sets all the other packet generators (28A,28B) in a non-generation state where the packet generators (28A,28B) do not generate the power packets by maintaining the switches (21A,21B,221A,221B,221C,221D,231A,231B, 231C,231D,292,514A,514B,516A,516B,521A,521B) in their OFF states; and when the differences occur between the target voltage and the voltage estimated as being applied to each of the plurality of loads (4A,4B), the selector sets each packet generator (28A,28B) in either the generation state or the non-generation state, based on the differences between the target voltage and the estimated voltage being applied to the respective loads (4A, 4B). a plurality of switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D, 292,514A,514B,516A,516B,521A,521B) respectively interposed in a plurality of sub transmission lines (L2, L3, L12, L13, L22, L23) each connecting the DC power source (1A,1B) to the main transmission line (L1, L11, L21), the plurality of switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D,292,514A, 514B,516A,516B,521A,521B) being connected in parallel to the main transmission line (L1, L11, L21); a plurality of packet generators (28A,28B) configured to generate the power packets by causing the switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D, 292,514A,514B,516A,516B,521A,521B) to perform ON/OFF operation, based on differences between the target voltages, and voltages estimated as being applied to the respective loads (4A,4B) in each of a first state where the power packets are supplied to the loads (4A,4B) and a second state where the power packets are not supplied to the loads (4A,4B); and a selector configured to perform switching between a state where the packet generators (28A,28B) cause the switches (21A,21B,221A,221B,221C,221D,231A,231B, 231C,231D,292,514A,514B,516A,516B,521A,521B) to perform ON/OFF operation, and a state where the packet generators (28A,28B) maintain the switches (21A,21B,221A,221B,221C,221D, 231A,231B,231C,231D,292,514A,514B,516A,516B,521A,521B) in their OFF states characterised in that the plurality of packet generators (28A,28B) are provided so as to correspond to the plurality of switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D,292,514A, 514B,516A,516B,521A,521B), respectively, and the selector sets any one of the plurality of packet generators (28A,28B) in a generation state where the packet generator (28A,28B) generates the power packet by causing the switches (21A,21B,221A,221B,221C,221D,231A,231B,231C,231D,292,514A,514B,516A, 516B,521A,521B) to perform ON/OFF operation, and sets all the other packet generators (28A,28B) in a non-generation state where the packet generators (28A,28B) do not generate the power packets by maintaining the switches (21A,21B,221A,221B,221C,221D,231A,231B, 231C,231D,292,514A,514B,516A,516B,521A,521B) in their OFF states; and when the differences occur between the target voltage and the voltage estimated as being applied to each of the plurality of loads (4A,4B), the selector sets each packet generator (28A,28B) in either the generation state or the non-generation state, based on the differences between the target voltage and the estimated voltage being applied to the respective loads (4A, 4B).