For example, SDG&E is deploying a new voltage stabilizer called a "dynamic VAr device" on a circuit with a large solar array that is already causing voltage fluctuations on the grid. The new device will level out the voltage drops caused by the fluctuating solar generation, thus preventing potential power quality problems. SDG&E also installed five batteries in 2012 – three small units in the community and two large units at SDG&E substations – designed to provide power and support the grid when the output from renewable sources fluctuates or becomes temporarily unavailable.SDG&E also has embarked on a condition-based maintenance program that can extend the life of valuable infrastructure by remotely "sensing" potential problems and alerting utility crews when maintenance is needed. SDG&E has installed these sensors on 75 percent of substation transformers and has used them to detect several problems before damage occurred to these million-dollar pieces of equipment. This not only saves money and reduces maintenance trips in the field, it can prompt repairs to vital infrastructure before they fail, which enhances electric grid reliability and safety.
SDG&E Installing New Smart Grid Technologies To Create "Self-Healing" Electric Grid For San Diego
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