SAN DIEGO (CNS) - The string of unplanned electric grid shutdowns that blacked out San Diego this month was first exacerbated when a power plant in Baja California protectively shut down, it was reported Saturday.
A local news source quoted California officials who said the first power generating station to shut down after an equipment failure in Arizona was in Mexicali, where a natural gas-fired unit went off-line 20 seconds after the Arizona mishap.
The chief executive officer of California-ISO, which controls and switches power supplies in this state, said it is not yet known if the Mexicali plant's shutdown was related to the Arizona problem. Stephen Berberich told the local news source that "the exact cause or definite answer is not quite sorted."
Javier Larios, regional superintendent for Mexico's Federal Electric Commission, said the Mexicali plant went down to protect its components. The plant is one of several sources of energy in Mexico for consumers in San Diego, Riverside and Orange counties.
Two transmission lines feed electricity from Mexicali-area power plants north to the U.S.
The Mexican plant's shutdown is one of 23 events on five separate but connected power grids that transpired in 11 minutes on Sept. 8. Once the dominos started falling, Cal-ISO officials at a control room near Sacramento were not able to "ramp up" alternate power generators and prevent the blackout of 7 million customers of San Diego Gas & Electric, Imperial Irrigation District and Federal Electric Commission in Southern California and Baja California, the newspaper reported.
Other major electricity generators, including the San Onofre Nuclear Generating Station in North County, also went into standby mode as power levels oscillated. Such automatic shutdowns are necessary to prevent damage, but the Cal-ISO investigation will determine if the cascading failures could have been prevented.
Cal-ISO is reconstructing a "second-by-second" record of what happened after a switching error at an Arizona Public Service substation in Yuma, Ariz. started the cascading failures, Berberich told the Union-Tribune.
Hundreds of statewide faith leaders will march Saturday afternoon to the Otay Mesa Detention Center, where they will protest immigration policies that separated more than 2,300 children from their parents.
A 325-acre blaze burning at Camp Pendleton Saturday was described as a ``training fire'' by a base official.
The average price of a gallon of self-serve regular gasoline in San Diego County dropped today for the 16th consecutive day, decreasing nine-tenths of a cent to $3.697.
A crash on an Oceanside freeway Saturday morning left two cars on their roofs and sent one person to a hospital, a fire official
Cooler weekend for the County due to a low pressure trough moving through the Great Basin. Weak and shallow marine layer may still be slow to clear.
A stretch of road in National City was shut down briefly after a large crowd took to the streets to celebrate the Mexico national soccer team's 2-1 victory over South Korea today in the 2018 FIFA World Cup.
The San Diego Humane Society today urged residents to volunteer their homes as foster spaces for the influx of animals typically lost after Fourth of July.
A man was critically injured Friday night when he chased a ball into the street and was hit by a car.
Clayton Richard pitched three-hit ball over six innings for his fourth consecutive win and the San Diego Padres beat the San Francisco Giants 6-2 on Friday night.
A powerful show of support for migrants being held in detention facilities has hundreds of interfaith leaders gathered Friday night for a vigil and demonstration at the border.