1. A user-side energy storage station is equivalent to equipping enterprises with a large-scale power bank. It can not only store and supply electricity, but also help enterprises save substantial electricity costs!
Why do enterprises need it?
Cut overall power consumption costs through peak-valley price arbitrage and demand control.
Guarantee power supply for critical loads.
Integrate power quality regulation functions to realize customized power supply services.
Delay power capacity expansion and renovation to save investment costs.
How does it bring profits to enterprises?
For industrial and commercial enterprises adopting time-of-use electricity pricing, the system stores power during off-peak hours and discharges power during peak hours, generating benefits from the price difference between peak and off-peak electricity prices.
Power charging in off-peak periods
Power discharging in peak periods
2. Installation Conditions for Energy Storage Stations
(1) Single transformer capacity above 630KVA
(2) Monthly peak power consumption over 90000 kWh
(3) Available charging space during off-peak hours (more than 30% of transformer capacity)
(4) Peak-valley electricity price difference above 0.7 yuan per kWh
Required Documents for Energy Storage Station Scheme Design
(1) Electricity bill details: Provide detailed electricity payment receipts for the latest 12 months (power bureau payment documents instead of invoices)
(2) Transformer data: Quantity and capacity of transformers corresponding to each user account and meter number on electricity bills
(3) Single transformer power consumption and daily load records: Hourly 400V low-side load data of transformers in typical months, fill in multiple records according to load fluctuation rules
(4) System drawing: Primary power distribution system diagram
(5) Spare switch interval: Reserve spare access interval in on-site low-voltage cabinets for electrical connection of energy storage systems
(6) Installation site: Indoor or outdoor space for energy storage equipment placement. Users need to level and harden the site, prevent waterlogging, arrange power cables and network cables and cooperate with installation work
Notes: Photos or scanned copies of the above four types of documents are acceptable with clear handwriting
Daily power load statistical forms can be downloaded and printed independently after logging in official power grid platforms or apps. If you have no account information, you can consult power grid customer service, contact exclusive account managers or go to local power supply business halls with business licenses and electricity payment notices for printing. Ask the enterprise power management department to assist in preparing relevant materials.
Make statistics respectively for each transformer.
3. Ten Major Benefits of Installing Energy Storage Power Stations
1. Enterprises have no capital investment cost. Free energy storage stations are provided and safely connected to power grid with insurance coverage supported by State Grid insurance company.
2. Comply with national time-of-use electricity pricing policies, balance peak and off-peak power consumption, realize peak load shifting, improve terminal power utilization efficiency, ease power shortage during peak hours and contribute to carbon peaking and carbon neutrality goals.
3. Store electricity at night and use it in daytime with over 4 times price gap, saving about 80% peak-period electricity fees and cutting production costs. 4. Reduce carbon emissions and obtain various national subsidies by participating in power demand response during peak periods.
5. Free enterprises from peak shifting power consumption restrictions, raise transformer utilization rate and reduce basic maximum demand electricity charges.
6. Serve as emergency power supply in case of sudden grid faults and scheduled power cuts, saving investment on UPS standby power supply.
7. Cut operating costs of diesel generators and enhance overall system reliability.
8. Realize transient active power emergency response to stabilize grid frequency fluctuation.
9. Provide transient voltage emergency support to solve voltage sag and interruption problems.
10. Equipped with power factor control function to supply reactive power flexibly.