Centralised (Shared)
Battery Storage Station for
Renewable Power Plants
Renewable energy sources like solar and wind are often
unstable and unpredictable, which undermines their efficiency
and impact. A centralised (shared) energy storage station offers
an innovative solution by combining the strengths of different
renewable sources, making clean energy station more
economically viable and reliable. The case study presents you
an example of the solution.
Industry Brief Background Business Challenges Solution Results
Project Name: Xiantao (Hubei) 50MW/100MWh Centralised
(Shared) Energy Storage Station for Solar Power Plants
Location: Hubei, China
Executive Summary
Key Metrics:
l Total installed capacity: 50MW/100MWh
l The energy storage power station covers an area of
8400m2
l The project generates approximately 240 million kWh of
electricity annually
l The first power station in Xiantao to successfully achieve
grid-connected power backfeeding.
Governments and companies worldwide are scaling up investments in
solar, wind, hydro, and other renewable energy sources, with solar
and wind accounting for the majority of this growth. According to the
IEA, renewables are expected to contribute over 90% of global
electricity capacity growth through 2030. The adoption of renewable
energy not only supports environmental and public health but also
enhances the resilience of power grids against various disruptions, with renewables serving as a backup energy source. To reduce greenhouse gas emissions, governments are implementing
policies to phase out policies for limiting the use of fossil fuels. China
has pledged to achieve carbon neutrality by 2060 and to peak carbon
emissions before 2030. The EU’s Renewable Energy Directive
mandates that 42.5% of its energy must come from renewable
sources by 2030. Thailand aims for carbon neutrality by 2050 and
net-zero greenhouse gas emissions by 2065. As the demand for
cleaner energy intensifies, new energy usage models such as electric
vehicles, are emerging.
Global Efforts in Achieving Carbon
Neutrality
Industry Brief
Shared energy storage integrated with wind and solar power offers an
innovative solution to key challenges facing renewable energy: the
inconsistency of power generation and the fragmentation of renewable
power plants. This approach involves a shared energy storage systems
connected to various renewable power plants across different locations via
distinct network control systems. Shared storage systems for wind and
solar power plants within a town can maximize energy storage utilization
and balance the intermittent nature of renewable energy generation.
For example, wind power can compensate for solar energy shortages
at night. Furthermore, the centralized battery management system
and power control system can reduce operation and maintenance
costs by eliminating the need for monitoring and maintenance at each
station. This setup facilitates the development of renewable energy
plants, making such investments more economically viable. Shared Storage: Smarter Integration for Renewable Energy
Industry Brief
Local Energy Overview
Background
Tertiary Industry
15.8%
Secondary Industry
57.8%
Households
22.8%
Primary Industry
3.6%
Energy Consumption Pattern of
Xiantao City, 2021
Local Energy Consumption Pattern in 2021:
Energy Consumption: 4.023 billion kWh (2021)
Population: 1.0932 million (2023)
Location: Xiantao City, Hubei Province, China
l To build a secure and diversified energy supply
system, the province aimed to add 20 million
kilowatts of new renewable energy installed
capacity.l The local policy mandates energy storage
allocation for new renewable energy projects
(wind farms and solar power plants), requiring a
storage capacity ratio of 20-30% of the installed
renewable capacity.
Xiantao’s Energy Goals
Due to the inherent intermittency and volatility of solar power, photovoltaic (PV) energy cannot yet operate independently without
the power grid. Independent solar power plants face challenges such
as inconsistent power supply and energy waste during periods of
peak generation. Furthermore, installing an energy storage system
for an individual renewable power plant involves high investment
costs and a long payback period. Solar power can only effectively
replace conventional energy sources when supported by sufficiently
advanced energy storage systems or supplemented by other energy
sources.
In a PV plant, when power generation is constrained, increased
reliance will be placed on the emergency support and grid-stabilizing
functions of energy storage systems. The operational processes of
energy storage stations may be further disrupted, potentially
compromising grid stability and system-wide efficiency optimization. Therefore, real-time monitoring and intelligent management of
energy storage systems are essential to ensure reliable operation.
BuacsikngersosuCndhallenges
The Xiantao 50MW/100MWh Centralized (Shared) Energy Storage
Power Station is serving as a complementary facility to a 325MW
fishery-solar hybrid photovoltaic project within a same area. The
station comprises 20 energy storage units capable of delivering
continuous discharge for at least 2 hours at rated power. It connects
to the 35KV side of the step-up substation of a PV power plant
through dual 35KV transmission lines, with an interconnection
distance of approximately 0.1km. The centralized energy storage system provider partners with wind
farms and solar power plants through a leasing model. Renewable
energy generated by wind and solar facilities is aggregated and stored
in the shared energy storage system before being fed into the grid as
a unified output. Each wind farm is connected via a dedicated ring
network with localized encryption to ensure secure data transmission.
In this project, 3onedata has deployed a cutting-edge digital
monitoring system, establishing a comprehensive data management
platform. This digital solution enables refined operational control, enhances system efficiency, ensures full process transparency, and
delivers intelligent management capabilities.
Solution: Centralized
Storage Empowering
Renewable Synergy
Solution
Networking Solution
Connectivity Brings Stability and Operational Excellence
Based on the specific requirements of the project, 3onedata has adopted the patented SW-Ring redundancy technology. In this solution, five
transformers are configured in a dual information ring network + single control ring network architecture.
In the single control ring network, battery status information, such as from the BMS and PCS, is transmitted to the core control network via a ring
formed by IES7110-2GS switches. In the event of a thermal management incident within the battery system, control commands can be sent in real
time via the dedicated control network. In the dual information ring network, devices at the front end, such as the battery modules, PCS, and
electric meters—are linked using IES318 switches. The data is encrypted centrally and then transmitted via two independent ring networks formed
by IES716-2GS to the IES5428, which then forwards it to the server. Meanwhile, the control network independently forms a ring using IES7110-2GS
switches to upload data to the IES5428 as well.
ICS6528
Solution
IES318 IES7110-2GS IES716-2GS IES5428
The dual-data ring and single-control ring network architecture enhances real-time performance, reliability, and security for both data transmission and control operations. Moreover, the network transmission system supports 100 Mbps access, Gigabit ring network communication, and 10 Gbps uplink aggregation, ensuring zero-delay information transfer. In compliance with industrial requirements, the connection devices are designed with EMC Level 4 protection, enabling them to withstand strong electromagnetic interference in field environments. Additionally, they comply with IEC 62443 industrial cybersecurity standards, offering multi-layered protection features such as user authentication, IP whitelisting, and secure HTTPS/TLS v1.2 configuration to prevent unauthorized access and cyberattacks. Leveraging Industry-Leading Technologies in Information Connectivity Solution
The centralized energy storage system enhances the energy
efficiency of renewable power plants and improves the overall
operational efficiency of the power grid. Equipped with non-walk-in
battery prefabricated cabins, the system includes independent
automatic control and safety assurance features such as power
supply, temperature control, thermal insulation, emergency response, and alarm systems. It provides a high level of protection against
potential incidents. The central station increases the energy density
of each storage unit and significantly reduces both installation and
maintenance costs by minimizing the need for upkeep across
multiple separate storage stations. Since its establishment, the project has provided approximately
262,555 MWh of green electricity annually, saving 80,200 tons of
standard coal equivalent. It has also reduced smoke and dust
emissions by around 1,232.8 tons and carbon dioxide emissions by
approximately 211,900 tons. As electricity generation increases, the
level of electrification in society has risen to 25% of total energy
consumption. Furthermore, this centralized energy storage system
contributes to the stability of the power grid on the supply side, helping reduce the average annual power outage time to within 1.5
hours for urban users and 7.5 hours for rural users by 2025.
Results
3onedata has facilitated the
project's one-step intelligent
operation and maintenance by
ensuring the stable operation
of the support system.




