Method for validating measurement/metering information for packet filtering based on deep packet inspection and distributed energy resource gateway using the same

A method for verifying validity of measurement/metering information for DPI-based packet filtering, the method comprising:

• collecting first and second measurement/metering information included in measurement/metering items from a smart inverter;
• calculating third measurement/metering information corresponding to the second measurement/metering information using the first measurement/metering information;
• comparing the second measurement/metering information and the third measurement/metering information;
• determining whether the error falls within a maximum possible error range;
• and
• performing deep packet inspection (DPI) functionality based on the determination result.

A distributed energy resource gateway (DER GW) comprising:

• at least one processor;
• and
• a memory configured to store computer-readable instructions,
• wherein the instructions are executed by the at least one processor for the distributed energy resource gateway to collect first measurement/metering information from a smart meter or embedded metering integrated circuit (IC) and second measurement/metering information from a smart inverter, calculate the error between the first measurement/metering information and the second measurement/metering information based on the first measurement/metering information, determine whether the calculated error falls within a maximum possible error range, and perform deep packet inspection (DPI) functionality according to the determination result.