Systems and methods for reducing harmonic content in a power network having distributed energy resources and distributed inverter systems

A method implemented by a controller system for reducing destructive harmonic content within a power network system, the power network system comprising one or more distributed energy resources, one or more distributed inverter systems, one or more nonlinear loads, and a bus coupling the one or more distributed energy resources to the one or more nonlinear loads, the method comprising:

• receiving, by one or more sensors, sensor data indicative of destructive harmonic content of a particular order on the bus;
• selecting a particular distributed inverter system of the one or more distributed inverter systems to inject constructive harmonic content to reduce the destructive harmonic content, the selecting including
• causing one of the one or more distributed inverter systems to generate first test constructive harmonic content of the particular order at different phases;
• monitoring an amount of reduction in the destructive harmonic content to identify its efficiency;
• determining that the one of the one or more distributed inverter systems has an efficiency greater than a threshold;
• and
• selecting the one of the one or more distributed inverter systems as the particular distributed inverter system;
• and
• using a particular distributed energy resource and the particular distributed inverter system to inject the constructive harmonic content to reduce the destructive harmonic content.

A controller system for reducing destructive harmonic content within a power network system, the power network system comprising one or more distributed energy resources, one or more distributed inverter systems, one or more nonlinear loads, and a bus coupling the one or more distributed energy resources to the one or more nonlinear loads, the controller system comprising:

• one or more sensors;
• one or more hardware processors;
• and
• memory storing computer instructions, the computer instructions when executed by the one or more hardware processors configured to perform:
• receiving, by the one or more sensors, sensor data indicative of destructive harmonic content of a particular order on the bus;
• selecting a particular distributed inverter system of the one or more distributed inverter systems to inject constructive harmonic content to reduce the destructive harmonic content, the selecting including
• causing each of the one or more distributed inverter systems to generate first test constructive harmonic content of the particular order at different phases;
• and
• monitoring an amount of reduction in the destructive harmonic content to identify one of the one or more distributed inverter systems with greatest efficiency as the particular distributed inverter system;
• and
• using a particular distributed energy resource and the particular distributed inverter system to inject the constructive harmonic content to reduce the destructive harmonic content.

A method implemented by a controller system for reducing destructive harmonic content within a power network system, the power network system comprising one or more distributed energy resources, one or more distributed inverter systems, one or more nonlinear loads, and a bus coupling the one or more distributed energy resources to the one or more nonlinear loads, the method comprising:

• receiving, by one or more sensors, sensor data indicative of destructive harmonic content of a particular order on the bus;
• selecting a particular distributed inverter system of the one or more distributed inverter systems to inject constructive harmonic content to reduce the destructive harmonic content, the selecting including
• causing each of the one or more distributed inverter systems to generate first test constructive harmonic content of the particular order at different phases;
• and
• monitoring an amount of reduction in the destructive harmonic content to identify one of the one or more distributed inverter systems with greatest efficiency as the particular distributed inverter system;
• and
• using a particular distributed energy resource and the particular distributed inverter system to inject the constructive harmonic content to reduce the destructive harmonic content.