Integrated operation and management solution for photovoltaic and energy storage charging stations

With the continuous increase in the number of new energy vehicles, the rapid popularization of high-power supercharging, and the dual driving force of distribution network expansion pressure and dual carbon goals, integrated charging stations for light storage and charging are moving from pilot demonstrations to large-scale popularization, becoming the mainstream development direction of new charging infrastructure. They can not only solve the pain points of traditional charging stations such as grid pressure and high costs, but also face practical bottlenecks such as investment, safety, operation and maintenance, and collaboration.

1、 Analysis of the advantages and disadvantages of photovoltaic energy storage integrated charging stations

The intensive implementation of policies such as the three-year doubling action of national charging facilities, the coordinated development of new energy storage and charging facilities, and the clear encouragement of integrated construction of photovoltaic energy storage and charging facilities, as well as the guidance of industry upgrading through multiple dividends such as construction subsidies, indicator conversion, simplified grid connection, and operational rewards, has brought obvious benefits.

Economic benefits: peak valley arbitrage, spontaneous self use, reduction of overcharging expansion and electricity costs, and participation in virtual power plant demand response to obtain subsidies and dispatch benefits.

Grid friendly: smooth out fluctuations in high-power overcharging loads, reduce impact on the grid, and improve the stability of power supply at stations.

Green and low-carbon: Reduce carbon emissions, adapt to the green rating requirements of parks, highways, and commercial districts, and comply with national encouragement policies.

User experience: Energy storage ensures continuous high-power output, stable charging speed, and improves station availability and reputation.

Wide scene adaptation: Full coverage of highways/parks/industrial and commercial areas.

However, integrated photovoltaic and energy storage charging stations also face many problems. Failure to solve these problems will constrain the development of integrated photovoltaic and energy storage charging stations and make it difficult to obtain investment returns.

The difficulty of optimizing collaboration is high: intermittent photovoltaic, energy storage charging and discharging, and random charging overlap. EMS energy management algorithms require high requirements, and insufficient optimization can lead to low efficiency, high waste of light, and increased operation and maintenance costs.

Grid compliance risk: The grid connection process is complex, and some regions have high requirements and strict control for photovoltaic and energy storage grid connection.

Prominent safety risks: difficult to detect and remind of risks such as fire safety, station environment, and illegal operations.

Difficulty in operation and maintenance: Multiple stations have a large workload and high operation and maintenance costs.

2、 Ankerui Integrated Charging Station Operation and Management Solution

In response to the core pain points of energy coordination difficulties, grid compliance and operational safety risks, oil vehicle occupancy, and complex operation and maintenance of integrated light storage and charging stations, Ankerui uses the "light, storage, charging, and management (operation management platform)" full stack product system as the base, AcrelEMS smart energy management platform provides a source grid load storage and charging integrated closed-loop solution, which can access hundreds of data from integrated light storage and charging stations, integrate mains electricity, photovoltaics, energy storage, charging piles, fire protection, dynamic environmental systems, etc., to achieve safety and controllability, cost reduction and efficiency improvement, intelligent collaboration, compliant grid connection, simplified operation and maintenance, and diversified income increase, supporting the scale and commercialization of integrated light storage and charging stations.

Multi energy collaborative control strategy

ACCU-1000L coordinated controllers are installed at each integrated photovoltaic and energy storage charging station to collect data from devices such as microcomputer protection, multifunctional instruments, power quality monitoring devices, photovoltaic inverters, energy storage cabinets, and charging piles. Multiple strategies such as anti backflow control, new energy consumption, peak valley arbitrage, and flexible expansion can be implemented based on actual conditions. A one stop one strategy is adopted according to the needs of each station, and the platform provides energy control strategies based on photovoltaic power generation prediction and charging power prediction to help charging stations optimize photovoltaic and energy storage efficiency and reduce electricity costs.

Schematic diagram of multi energy collaborative strategy for integrated light storage charging station

Compliance and grid connection protection control

Ankerui provides anti islanding protection, power quality monitoring, anti backflow protection and regulation, as well as power dispatch docking functions for the grid connection of distributed photovoltaic and energy storage systems. It realizes active/reactive power control, power generation prediction, frequency and voltage emergency control, etc., and meets the requirements of observability, measurability, adjustability, and controllability of distributed substations, providing system guarantee for the safe and compliant operation of integrated photovoltaic and energy storage power stations.

Station safety

The AcrelEMS smart energy management platform collects data on photovoltaic systems, energy storage systems, fire protection systems, environmental temperature and humidity, water immersion, in station videos, equipment status, etc., to timely detect abnormal risks of photovoltaic storage and charging equipment, such as excessive deviation in photovoltaic power generation, thermal runaway of energy storage, transformer overload, abnormal heating of electrical cabinets, partial discharge, abnormal opening of electrical cabinet doors, and other abnormal situations monitoring and alarm. It transforms "passive repair" into "active operation and maintenance", improving the safety of station operation.

Figure 4 Equipment Operation Monitoring

Reliable operation

The AcrelCLoud-9000 charging operation management platform from Ankerui can achieve monitoring, scheduling, and management of charging stations, and provide traffic to charging stations based on a third-party drainage platform. Users can make advance appointments for charging through apps or mini programs, avoiding waiting in line at charging stations, and providing more accurate charging demand data for charging stations, facilitating subsequent scheduling and management. The platform supports functions such as scanning/swiping cards for charging, navigation for finding piles, order management, monitoring of charging piles, and revenue analysis.

Figure 5 Operation Monitoring of Charging Station

3、 Ankerui charging station equipment

Ankerui Electric's AEV series charging piles cover the full range of AC slow charging, DC fast charging, split type supercharging, and low-power portable DC charging, with power ranging from 7kW-960kW. They are suitable for all scenarios such as home use, communities, parks, commercial districts, high-speed service areas, and integrated light storage and charging power stations. With safety and reliability, intelligent metering, flexible scheduling, and cloud management edge collaboration as the core advantages, they match the needs of new energy vehicle energy replenishment and light storage charging collaborative operation.

4、 Conclusion

Ankerui's integrated solution for optical storage and charging, with AcrelEMS smart energy management as the brain, safety and reliability as the foundation, and cost reduction and revenue increase as the goal, provides a one-stop solution to the six core pain points of charging stations: cost, safety, collaboration, grid connection, operation and maintenance, and profitability. It features full power coverage, full scene adaptation, full chain security, and cloud edge integration, helping operators create a safe, green, economical, and intelligent new generation of optical storage and charging demonstration stations, which is in line with the dual carbon strategy and charging infrastructure upgrade trend, and has strong practicality and commercial competitiveness.

Integrated operation and management solution for photovoltaic and energy storage charging stations