First of all, popularize science: the integration of solar storage and charging, as the name implies, is a green charging mode that integrates photovoltaic power generation, energy storage, and charging and coordinates with each other.

According to statistics, the number of new energy vehicles sold in March 2023 is estimated to be around 15 million, and as of April 2023, the cumulative number of charging infrastructure in the country is 6.092 million units, which shows that there is a huge gap in charging piles. The development of new energy vehicles and charging piles is so unbalanced, the value and significance of the integrated power station of solar storage and charging are more prominent. Today, I will introduce you to the "integrated solution of Kortrong energy storage, solar storage and charging":

01 Policy background

In order to implement the strategic deployment of the Party Central Committee and the State Council of "carbon peak and carbon neutrality", promote the in-depth implementation of the "New Energy Vehicle Industry Development Plan (2021-2035)", promote the improvement of the level of electrification of vehicles in the public sector, and accelerate the construction of a green and low-carbon transportation system, eight departments, including the Ministry of Industry and Information Technology and the Ministry of Transport, jointly issued a notice to organize the pilot work of the pilot zone for the comprehensive electrification of vehicles in the public sector.

Accelerate the application of new charging and replacement technologies such as intelligent and orderly charging, high-power charging, automatic charging, and rapid power replacement, and accelerate the pilot application of "optical storage, charging and discharging" integration.

Explore the implementation path for new energy vehicles to participate in the electricity spot market, improve the green power trading mechanism for storage and release, increase the construction of smart travel and intelligent green logistics system, promote the application of new technologies such as intelligent network connection and vehicle-network integration, and accelerate the integrated development of new energy vehicles with energy, transportation and other fields.

02 System architecture

Solution of Kortrong energy storage solar storage and charging

• Flexible design: The system has a large access power range and flexible design, which can be connected to other types of power generation systems such as photovoltaic energy and wind power generation.

• Flexible expansion: The existing station has insufficient power capacity, and can be directly connected to the energy storage unit to increase the power capacity, with low transformation cost and short construction period.

• Unlimited capacity: The expansion scale of the AC bus system is less limited, and the maximum can reach MW to meet the needs of large-scale charging.

03 Main application functions

A）New energy consumption 

It can effectively suppress the power fluctuation of shock load or distributed power supply in the platform, and support a variety of charging and discharging modes such as constant current, constant voltage or constant power, which can complete the full power charging to full power discharge or full power discharge to full power charging process within 100ms.

B ）Peak shaving and valley filling 

Through the charge and discharge function, the combined cabinet energy storage system stores electric energy during the trough of electricity consumption, releases electric energy at the peak of electricity consumption, weakens the peak-valley difference of the power grid, improves the load characteristics of the power grid, realizes the load level control and load transfer of the power system, and automatically adjusts the output according to the load to ensure the safe and reliable operation of the system.

C） Dynamic capacity increase operation strategy

According to the user-side energy storage application requirements, in the grid-connected operation state, the energy storage system needs to have a dynamic capacity increase function in addition to the daily scheduled charge and discharge operation mode.

D） Demand management operation mode

The energy storage system EMS automatically obtains the active power data at the metering gate (the value is sent to the EMS substation by the two-way metering meter on the high-voltage side of the transformer), and manually sets the demand limit a as the monthly initial demand limit, when the transformer load power is lower than the current demand limit, the system automatically implements the "peak-valley arbitrage" operation mode; When the transformer load power is greater than or equal to the current demand limit, the system quickly switches to the "demand management" mode, reducing the PCS charging power or switching directly from the charging state to the discharged state.

E） Anti-reverse flow operation mode

The low-voltage side of the transformer is equipped with a two-way metering meter and sent to the EMS substation to detect voltage, current, active power, reactive power, active power and other data and power flow direction, and upload it to the EMS substation to realize the function of anti-reverse current. Once a countercurrent occurs, the EMS substation will issue a charge and discharge command to the PCS to reduce the PCS discharge power or directly shut down.

Control strategy: set the power value of the load side to A and the anti-backflow adjustment value to D.

(1) When the collected power value A>D, the discharge power P of the energy storage system remains unchanged. 

(2) When the collected power value A<D, the output power of the energy storage system decreases the value △P=(D-A)/2.

(3) The judgment period can be set, and the preset value is 60s.

04 System composition

Kortrong Integrated Liquid Cooling ESS

1. Three-phase four-wire electrical design, support parallel/off-grid operation mode

2. Single cluster and single channel independent control, discharge depth more than 95%

3. Equipped with self-developed SCR switching device, it can achieve 10ms and off-grid fast switching

4. Perfect application function, suitable for industrial parks, distribution station areas, optical storage charging stations and other scenarios

Kortrong energy storage EMS Cloud platform

Kortrong energy storage EMS consists of three parts: Kortrong energy storage cloud + local EMS + mobile APP;

Each energy storage system is equipped with local EMS, and the Kortrong energy storage cloud can be used by customers free of charge;

You can log in to the energy storage cloud through the webpage or view the parameters of each energy storage system in real time through the mobile APP;

Realize unattended, intelligent O&M, fault prediction, and multilateral collaboration;

EMS reserves communication interfaces to support docking with related platforms to achieve multi-platform information interaction.

05 Typical case

Guangzhou storage and charging intelligent integration demonstration project

  Project address: Guangzhou City, Guangdong Province

  Project scale: 240kW/430kWh

  Application type: combined cabinet energy storage system + supercharging station

  Project value: Demonstration project, using the characteristics of dynamic capacity increase of energy storage equipment, build an intelligent platform to reasonably solve the contradiction between the load of the supercharging station and the capacity of the transformer.

Chongqing optical storage and charging inspection and changing station multi-functional integrated station

Project address: Chongqing City

  Project scale: The total project capacity is 3.72MW/6.665MWh

  Application type: photovoltaic + charging pile + detection + power exchange + energy storage system

  Project value: China's first multi-functional integrated station integrating "photovoltaic, energy storage, charging, testing, power exchange, and leisure"; It can store photovoltaic green power to achieve local consumption, and can also charge during off-peak load hours of electricity prices, and supply power to electric vehicles during peak load hours, "shaving peaks and filling valleys" to improve operating income.

Shandong wind, solar storage and charging integration user-side energy storage project

  Project address: Shandong Province

  Project scale: 480kW/1.72MWh energy storage system (including photovoltaic, small fan, AC charging pile, DC charger)

  Application type: combined cabinet energy storage system + photovoltaic + fan + charger

  Project value: demonstration project, the main functions include peak-valley arbitrage, dynamic capacity increase, demand management, new energy consumption, and reduce the electricity cost of the plant.

If you have any intention to cooperate, please contact us: Tel +86 0756-6256588 or 13824161212 (same number as WeChat)