Method, apparatus and device for determing voltage support strength of renewable energy power system in real time, storage medium and computer program product

An apparatus for determining voltage support strength of a renewable energy power system in real time, comprising:

• a memory for storing computer executable instructions;
• and
• a processor connected to the memory, wherein the processor is configured to execute the computer executable instructions to:
• collect a bus real-time operating voltage and a collection line current of a monitoring point of the renewable energy power system, wherein the renewable energy power system comprises at least one renewable energy plant, each renewable energy plant comprises at least one renewable energy unit, and the monitoring point is a bus of a renewable energy plant or a terminal bus of a renewable energy unit;
• calculate a system's Thevenin equivalent potential of the monitoring point according to the bus real-time operating voltage and the collection line current;
• calculate a short circuit ratio of the monitoring point and a critical short circuit ratio of the monitoring point according to a nominal voltage of the monitoring point, the system's Thevenin equivalent potential and the bus real-time operating voltage;
• calculate a safety margin of the short circuit ratio of the monitoring point according to the short circuit ratio of the monitoring point and the critical short circuit ratio of the monitoring point;
• and
• determine a strength division result of the voltage support strength of the renewable energy power system according to the safety margin of the short circuit ratio of the monitoring point and a set voltage support strength division criterion.

A non-transitory computer-readable storage medium, having stored thereon a computer program that, when executed by at least one processor, performs a method for determining voltage support strength of a renewable energy power system in real time, the method comprising:

• collecting a bus real-time operating voltage and a collection line current of a monitoring point of the renewable energy power system, wherein the renewable energy power system comprises at least one renewable energy plant, each renewable energy plant comprises at least one renewable energy unit, and the monitoring point is a bus of a renewable energy plant or a terminal bus of a renewable energy unit;
• calculating a system's Thevenin equivalent potential of the monitoring point according to the bus real-time operating voltage and the collection line current;
• calculating a short circuit ratio of the monitoring point and a critical short circuit ratio of the monitoring point according to a nominal voltage of the monitoring point, the system's Thevenin equivalent potential and the bus real-time operating voltage;
• calculating a safety margin of the short circuit ratio of the monitoring point according to the short circuit ratio of the monitoring point and the critical short circuit ratio of the monitoring point;
• and
• determining a strength division result of the voltage support strength of the renewable energy power system according to the safety margin of the short circuit ratio of the monitoring point and a set voltage support strength division criterion.