Power router and operation control method thereof, power network system, and non-transitory computer readable media storing program

A power network system comprising:

• one or more power routers;
• and
• a power system that is directly or indirectly connected with the one or more power routers, wherein each of the one or more power routers comprises:
• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a control unit that determines whether a stopping target leg instructed by a control instruction can be stopped, and stops the stopping target leg when the stopping target leg can be stopped, wherein
• a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level,
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, the control unit switches another power conversion leg other than the stopping target leg to the master mode and stops the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, the control unit notifies that the stopping of the stopping target leg is impossible to outside and continues to operate the stopping target leg.

An operation control method of a power router, the power router including:

• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• and
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner, in the power router, the method comprising:
• determining whether a stopping target leg instructed by a control instruction can be stopped, and
• stopping the stopping target leg when the stopping target leg can be stopped, wherein a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level, and the method further comprises:
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, switching another power conversion leg other than the stopping target leg to the master mode and stopping the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, notifying that the stopping of the stopping target leg is impossible to outside and continuing to operate the stopping target leg.

A non-transitory computer readable media storing a power router operation control program, the power router including:

• a direct current whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a computer that configures a control unit that controls operations of the plurality of power conversion legs, the program causing the computer to execute:
• a process of determining whether a stopping target leg instructed by a control instruction can be stopped;
• and
• a process of stopping the stopping target leg when the stopping target leg can be stopped, wherein a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level, and the program causes the computer to further execute:
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, a process of switching another power conversion leg other than the stopping target leg to the master mode and stopping the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, a process of notifying that the stopping of the stopping target leg is impossible to outside and continuing operation of the stopping target leg.

A non-transitory computer readable media storing a management device control program comprising:

• one or more power routers;
• a power system that is directly or indirectly connected with the power router;
• and
• a computer that configures a management device controlling operations of the one or more power routers, wherein each of the one or more power routers comprises:
• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a control unit that controls operations of the plurality of power conversion legs;
• the program causes the computer to execute a process of outputting a control instruction including a designation of a stopping target leg that is a target leg to be stopped in the plurality of power conversion legs to the stopping target leg included in any one of the one or more power routers;
• and
• the control unit:
• determines whether a stopping target leg instructed by the control instruction can be stopped;
• and
• stops the stopping target leg when the stopping target leg can be stopped, wherein
• a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level,
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, the control unit switches another power conversion leg other than the stopping target leg to the master mode and stops the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, the control unit notifies that the stopping of the stopping target leg is impossible to outside and continues to operate the stopping target leg.

A power router comprising:

• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a control means for determining whether a stopping target leg instructed by a control instruction can be stopped, and stopping the stopping target leg when the stopping target leg can be stopped, wherein
• a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level,
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, the control means switches another power conversion leg other than the stopping target leg to the master mode and stops the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, the control means notifies that the stopping of the stopping target leg is impossible to outside and continues to operate the stopping target leg.

A power network system comprising:

• one or more power routers;
• and
• a power system that is directly or indirectly connected with the power router, wherein each of the one or more power routers comprises:
• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a control means for determining whether a stopping target leg instructed by a control instruction can be stopped, and stopping the stopping target leg when the stopping target leg can be stopped, wherein
• a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level,
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, the control unit switches another power conversion leg other than the stopping target leg to the master mode and stops the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, the control unit notifies that the stopping of the stopping target leg is impossible to outside and continues to operate the stopping target leg.

A non-transitory computer readable media storing a power router operation control program, the power router including:

• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a computer that configures a control means for controlling operations of the plurality of power conversion legs, the program causing the computer to execute:
• a process of determining whether a stopping target leg instructed by a control instruction can be stopped;
• and
• a process of stopping the stopping target leg when the stopping target leg can be stopped, wherein a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level, and the program causes the computer to further execute:
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, a process of switching another power conversion leg other than the stopping target leg to the master mode and stopping the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, a process of notifying that the stopping of the stopping target leg is impossible to outside and continuing operation of the stopping target leg.

A non-transitory computer readable media storing a management device control program comprising:

• one or more power routers;
• a power system that is directly or indirectly connected with the power router;
• and
• a computer that configures a management device controlling operations of the one or more power routers, wherein each of the one or more power routers comprises:
• a direct current bus whose voltage is controlled to be maintained at a voltage level;
• a plurality of power conversion legs having one end connected to the direct current bus and another end communicatively coupled to an connection partner, each of the plurality of power conversion legs allowing power to flow bi-directionally between the direct current bus and the connection partner;
• and
• a control means for controlling operations of the plurality of power conversion legs;
• the program causes the computer to execute a process of outputting a control instruction including a designation of a stopping target leg that is a target leg to be stopped in the plurality of power conversion legs to the stopping target leg included in any one of the one or more power routers;
• and
• the control means:
• determines whether a stopping target leg instructed by the control instruction can be stopped;
• and
• stops the stopping target leg when the stopping target leg can be stopped, wherein
• a power conversion leg selected from the plurality of power conversion legs is operated in a master mode, wherein the power conversion leg that is operated in the master mode transmits power to or receives power from the connection partner to maintain the direct current bus voltage at the voltage level,
• when other power conversion legs except for the stopping target leg do not stop their operations and the stopping target leg is operated in the master mode, the control unit switches another power conversion leg other than the stopping target leg to the master mode and stops the stopping target leg, and
• when any of the other power conversion legs except for the stopping target leg stop their operations, the control unit notifies that the stopping of the stopping target leg is impossible to outside and continues to operate the stopping target leg.