Building management system with automatic training data selection for online system identification

A system comprising:

• building equipment configured to operate in accordance with a setpoint for a variable state or condition of a space;
• a sensor configured to obtain a measured value for the variable state or condition of the space;
• a controller configured to:
• perform, for a segment of a training period, a test comprising at least one of:
• a first assessment of a correlation between the setpoint and the measured value during the segment;
• a second assessment of a load on the building equipment during the segment relative to a threshold load;
• a third assessment of durations between setpoint changes during the segment;
• or
• a fourth assessment of a count of the setpoint changes during the segment that satisfy a criterion;
• train a system model using a set of training data, wherein data corresponding to the segment is included or excluded from the set of training data based on the test;
• and
• control the building equipment using the system model.

Non-transitory computer-readable media storing program instructions that, when executed by a processor, cause the processor to perform operations comprising:

• performing, for a segment of a training period, a test comprising at least one of:
• a first assessment of whether a correlation between a setpoint and a measurement during the segment satisfies a threshold correlation;
• a second assessment of whether a load on equipment exceeds a threshold load for at least an amount of the segment;
• a third assessment of durations between setpoint changes during the segment relative to a minimum threshold duration and a maximum threshold duration;
• including or excluding data for the segment from a set of training data for the training period based on the test;
• and
• controlling the equipment using a model trained based on the set of training data.