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Circuit Breaker Breaking Singapore's Electrical Demand

As announced by the Singapore Prime Minister Mr. Lee Hsien Loong, the circuit breaker is going to be extended to the 1 June 2020. With stricter measures in place, we definitely hope a decrease in number of COVID-19 and that we can go back to work again together. Here at RESYNC, we run a cloud-based energy management solution so that our customers can understand their Load Profiles, their Renewable Energy Performance whether it being Month on Month or Year on Year. In this post, we share with you the impact of Circuit Breaker on Singapore’s electrical demand.

ANALYSIS: Year on Year Impact


Singapore’s daily electrical demand in April 2020 is declining specially after the 6 April (When the Circuit Breaker was implemented). The electrical demand in both Apr 2018 and Apr 2019 is higher than in Apr 2020. The average daily demand trend can be seen from the figure below:


“Comparing the average daily demand, it is seen that April 2020 took a significant dip. The demand in 2020 has decreased by over 6 GWh every day compared to 2019, which is equivalent to daily consumption of 473,000 households[1].”


Diving into the hourly average demand on weekday for April, it can be seen that the hourly demand for April 2020 is significantly lesser than April 2018 and April 2019. Due to the closure of manufacturing plants, offices, malls etc., electrical demand has significantly decreased. The expected[2] average hourly demand line is the dashed lines and the actual demand for 2020 is the purple pentagon line.

A similar pattern is seen for the weekend hourly demand where as a general trend demand in April 2020 is lower than both April 2018 and 2019., The demand is expected to grow on a year by year basis, however, demand in Apr 2020 doesn’t meet the expected demand.


“ There’s a significant drop in an average hourly demand in weekdays and weekends compared to the expected energy. On weekdays hourly demand decreased by 7.77% which is 462 MWh. Whereas for the weekend, it decreased by 5.85% which is 325 MWh.”

ANALYSIS: Month on Month Impact


Average electrical demand in Singapore for 2020 is broken down into each day and individual month. We can see that the demand for April 2020 is lower than Jan through Mar. This is most likely due to the circuit breaker effect on the electrical load demand. We can see the trend of each month compared to each day in the following plot:



“We can see that the energy demand hit near its peak in March and dropped significantly in April due to the Circuit Breaker Measures.”



Delving deeper into average hourly demand for weekday for each individual month, we can see that April’s demand is significantly lesser than the rest of the months. April as compared to March has shown a decrease of about 5.39% per hour where we can see the main bulk of demand differences occurs from 8am to 9pm.


And diving into average hourly demand for the weekend, we also see that it’s the lowest among the months. The decrease for April 2020 as compared to March 2020 is roughly 3.32% indicating a significant drop. This may be due to mall being closed and a lot of Singapore facilities are not open either due to the Circuit Breaker Measures.

Conclusion

Singapore’s Circuit Breaker affects a lot of people’s livelihood, from businesses closing to everyone staying at home. This has led to a significant decrease on Singapore’s electrical demand. However, all this time renewables like solar keep on generating and their operation become more complicated. Theoretically, you can store this solar energy into a battery storage and use it during night. However, there is much more at stake including reliability and stability of the power systems and it might not be the most cost optimal solution. We at RESYNC optimize your energy costs, ensure reliability and stability, provide real time insights, forecast your site energy generation and demand and a detailed report after each month in your site and your overall sites that you have provided to us. Check out this article on how we achieve all this. Talk to us on how you can use Resync for more energy efficient operation.




Reference:

[1]An average household is assumed to be a 4-room HDB.Average monthly consumption of a 4-room HDB flat consumes is around 386 kWh (Data from EMA)

[2]he expected demand is calculated by considering same year on year growth as from 2018 to 2019.

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