30% of New Zealand families with solar systems with energy storage battery

Solar photovoltaic (pv) net news: recently, the New Zealand state grid operator Transpower published a report found that with the increase of roof photovoltaic (pv) and electric vehicles, the widespread use of distributed energy storage battery can support power system, battery technology progress to ensure the safety and reliability of power system.

, according to the real-time transmission of data Transpower website although renewable energy application in New Zealand have nearly 90% of its electricity demand, but the photovoltaic power generation is not even listed in the running of clean energy technology, its installed capacity of about 97 MW, in the national energy structure and the proportion of less than 1%. According to the New Zealand electricity administration data, residential solar occupies the largest share of the installed capacity of 80 MW, and only about half of them are installed in the past two years.

to New Zealand energy system to a higher electrification transition need more capacity, cheap solar energy will become one of the biggest competitors. In a report released earlier this year, Transpower made it clear that residential solar has 11 gw production potential, and warned that no battery energy storage of solar energy facilities will enlarge the demand peak in the evening.

in one study, Transpower found under the condition of the minimal impact of power system can provide at most 2 GW of solar power, and 4 GW of solar power will bring impact to the voltage and frequency management, but the latest report, increase the distributed energy storage battery can help to solve this problem.

New Zealand distributed battery energy storage system, the report found through smooth daily load conditions and delaying investment in power grid upgrade, after the battery meter can improve the operators on the use of the power grid and power generation. In addition, the large-scale distribution network can help manage power system low-frequency events.

in order to excavate the potential of the battery energy storage, New Zealand has taken important measures, to integrate distributed battery energy storage and the virtual power plants ( vpp) In the. Last December, the climate change minister James Shaw introduced is known as the world's largest VPP, this system provided by the local company Solarcity, connect the 3000 residential solar + energy storage system, the system can also store 18 MWh.

the latest report also found that the current power system can adapt to New Zealand to increase electric vehicle charging load. The low utilization rate of 64000 electric cars will not pose a challenge to the performance of a power system, the number of electric cars, in most cases, hold can even reach 2 million. Climate change minister James said Shaw, & other; Assume that there are 2 million electric car charging at the end of the day, the evening peak demand will increase by 25%. This is about to increase transmission capacity and peak. ” The battery energy storage will help to solve it.

New Zealand sustainable energy association, the national every 25 minutes to install a photovoltaic system, in a solar system in New Zealand families, about 30% have energy storage battery, this data is higher than 24% in 2017 and 16% in 2016.

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