Advanced diagnostics and control system for artificial lift systems

A diagnostics and control system (DCS) for an artificial lift system (ALS) in a well, the DCS comprising:

• a sensor network comprising a plurality of sensors for monitoring and obtaining measurements at a power source of the ALS and at a downhole pump of the ALS;
• a conditioning subsystem configured to measure ALS system performance data, the ALS system performance data comprising capturing a plurality of complete patterns comprising spectral content of voltage and current waveforms, harmonics, and frequency;
• a processing subsystem configured to receive communications from the conditioning subsystem and comprising a processor configured to process sensor data obtained by the sensor network;
• and
• a permanent local wellsite monitor that is controlled by the processing subsystem and is powered using a production controller of the ALS, wherein the permanent local wellsite monitor comprises a central surveillance center for transmitting commands and coordinating testing of the ALS among the sensor network, the conditioning subsystem, and the processing subsystem,
• wherein a condition of the ALS is evaluated by the permanent local wellsite monitor using the processed sensor data, testing results and system performance data to monitor a health of the ALS, and
• wherein evaluating the condition of the ALS comprises:
• sending high speed pulses on only a first power cable conductor of a 3-phase power system of the ALS:
• recording, in response to sending the high speed pulses, response on a second power cable conductor of the 3-phase power system, the second conductor being separate from the first conductor;
• determining, based at least on the recorded response on the second conductor, a power cable condition of the 3-phase power system;
• establishing microsecond windows in each waveform cycle of the 3-phase power system;
• and
• comparing the recorded response recovered from each of the microsecond windows to extract common data to remove noise effects,
• wherein said determining the power cable condition is based on the extracted common data.