Huawei shares commitment to build low carbon society at Intersolar Europe

By Huawei
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Huawei has shared its commitment to collaborating with partners and customers and empowering them with innovative FusionSolar Smart PV solutions for a better, greener, and smarter future at Intersolar Europe. Under the theme of “Building a low-carbon smart society”, Huawei invited its global clients and partners to experience the progress and potential of solar power at its exhibition booth. The company demonstrated how it combines solar with storage and intelligence to accelerate the deployment of solar power as a mainstream energy and enable industries and households to benefit from green electricity.

I. FusionSolar Smart PV Solution 6.0+: Safe, Reliable, and with Higher Yields

Huawei’s FusionSolar Smart PV Solution features its Smart String Inverter and has been widely recognized by customers for its delivery of clean solar power by integrating digital and power electronics technologies while promoting the digital and intelligent development of the PV industry.

A. Ensure Safety and Reliability for Power Plants

With the increasing power of modules and inverters, safety on the direct current (DC) side has become a challenge for PV plants. After over two years of R&D effort, Huawei has launched the exclusive Smart String-Level Disconnector Technology (SSLD-TECH), achieving active DC disconnection and precise string-level disconnection. Based on an all-scenario design approach with high precision and fast response, SSLD-TECH accurately identifies and reliably cuts off common DC system faults, breaking reverse string connection/reverse current flow and inverter short circuit.

In terms of reliability, according to a report issued by TÜV in March 2022, Huawei’s Smart PV Solution has achieved a 99.999% availability based on the operational data of the 2.2 GW project in Qinghai, China. With durable modules and smart O&M, the world’s largest power plants can run smoothly and efficiently.

B. Grid Forming

Developed by Huawei, the intelligent grid connection algorithm enables a PV system to be adapted to various grid scenarios. Specifically, it enables excellent performance in terms of frequency and voltage in a weak grid environment and comprehensively improves a PV power plant’s voltage and power control capabilities. When the value of SCR is as low as 1.2, the intelligent grid connection algorithm ensures that the inverter runs at full power without derating and successfully passes through high and low voltage continuously. This supports the stability of the power grid and addresses the global issue of large-scale grid-connected consumption of new energy.

In terms of power grid support, Huawei’s Smart PV & Storage Solution can be used to build a voltage source power station which is compatible with the power grid. This verified that Grid Forming technology can increase the proportion of new energy access this year, based on the integration of optical storage.

The Grid Forming technology completes technical verification in a weak grid environment, further accelerating PV power generation from “Grid Supporting” to “Grid Forming”, and advancing solar power to become a main energy source.

C. Increase Power Generation and Make Optimal Investment

Huawei string inverters use multi-channel maximum power point tracking (MPPT) to solve the problem of string mismatch, and the Smart DC System (SDS) to achieve an increase of more than 1% in power generation through the integration of AI algorithms. In Guangxi, China, the solution increases power generation by 1.69%. Huawei cooperates with numerous tracker brands to provide users with an enhanced experience. Real-time data from multiple global projects shows that its smart PV solutions can significantly increase power generation and help customers shorten their investment payback period.

D. Smart O&M

Smart I-V Curve Diagnosis 4.0 has revolutionized traditional operation and maintenance methods. It is the equivalent of a “CT scan”, offering a complete online inspection of 100 MW power plants in 20 minutes and automatically generating diagnostic reports. It can also scan regularly within flexible times, providing an enhanced user experience. In addition, it supports 14 types of fault diagnosis, with a convergence rate of more than 80% of main faults. The key indicators of IV detection, the recognition, accuracy and recurrence rates, are all greater than 90%. This meets the industry’s highest level of CGC appraisal IV classification, certification Level 4. In a real-life application, it has enabled a Malaysian client with a 30 MW project to save 2,000 hours of workload every year.

II. Smart String ESS: FusionSolar for Optimal Levelized Cost of Energy Storage (LCOS)

Energy storage plays an important role in electricity generation, transmission, distribution and consumption within the clean energy system. An Energy Storage Solution (ESS) serves simultaneously as a power reserve and grid regulator and stabilizer, providing valuable resources for peak shaving and frequency regulation.

Due to cell mismatch, conventional energy storage solutions are characterized by limited capacity, short service life, complex O&M, and significant safety risk, inhibiting their widespread application. With over ten years of R&D experience in ESS, Huawei integrates digital, power electronics and energy storage technologies in a unique smart string structure to overcome the limitations of lithium batteries. Suitable for peak shaving and frequency regulation, the company’s Smart String ESS delivers a flexible and cost-effective solution with higher profit potential.

A. Optimal Investment

Huawei adopts four innovations to boost energy throughput in battery charging and discharging, offering a solution to cell mismatch.

• The pack-level optimization of Smart String ESS enables independent charging and discharging of cells to prevent mismatch loss.

• Rack-level optimization improves energy throughput by 15%, or reduces the initial configuration by 15% at the same energy throughput, by eliminating the risks of circulating currents.

• With distributed cooling, temperature difference in the container can be controlled within 3°C at a 0.5 C-rate, which extends battery life by 50%.

• The efficient and reliable all-modular design cuts the levelized cost of energy storage (LCOS) by 20% to generate more revenue.

B. Simplified O&M

The problem of cell mismatch is intensified during the operation of a PV plant, requiring routine shutdowns for the manual calibration of battery state of charge (SOC). Through Huawei’s exclusive pack-level optimization, automatic SOC calibration is carried out without the need to pause operations. The easy replacement of faulty modules eliminates the need for onsite visits by experts, significantly reducing O&M costs. Pre-installed with battery cells, each container weighs less than 30 tons, making transport more straightforward.

C. Safety and Reliability

Focusing on end-to-end safety design, Huawei has implemented four-layer active shutdown and two-level passive isolation of ESS protection to ensure all-round system safety.

In response to different business models, the company’s Smart String ESS can be deployed flexibly to create value for customers. Huawei’s energy storage solution achieves the streamlined management of battery discharging with its Smart Rack Controller, ensuring longer, constant power output, which is critical to frequency regulation. At the same time, Huawei’s automatic SOC calibration and high availability addresses the industry challenges for ESS in frequency regulation scenarios, such as high SOC balance frequency and component failures, reducing operating costs for customers. For peak shaving, the Pack Optimizer and Smart Rack Controller increase power output by 15% during the life cycle, generating higher revenues.

III. Commercial & Industrial Smart PV Solution 2.0: FusionSolar for a Sustainable Business

With increasing demand from organisations to reduce electricity costs and carbon emissions, Huawei launched the 1+3 C&I Smart PV Solution 2.0, including an all-new three-phase inverter (SUN2000-50KTL-M3), a Smart String ESS (LUNA2000-200KWH-2H0), which can be coupled with the 100kW power conditioning system (PCS), and a smart PV optimizer (MERC-1100W/1300W-P). The C&I Smart PV Solution will help industries move into a low-carbon era with optimized electricity costs, active safety, and smart O&M for an enhanced experience.

Electricity consumption usually peaks in the daytime and the consumption curve is comparatively consistent with the PV curve. Electricity costs can be significantly reduced by using PV power for self-consumption and selling the remaining power to the grid at feed-in tariff rates. The installation of an ESS further boosts the self-consumption rate to more than 80% and, by taking advantage of critical peak pricing, production costs can be lowered. These solutions can help customers build a low-carbon environment with improved competitiveness for green development.

A. Optimal Electricity Cost: As seen from case study comparisons, Huawei’s C&I Smart PV Solution can increase power generation by more than 2% under the same conditions. To address shading issues commonly faced by the C&I sector, the company has launched its latest MERC-1100W/1300W-P optimizer, increasing installation volume by up to 30%. When system capacity is elevated from 175kW to 200kW, a 15% increase in installation volume can contribute 25,000 kWh of additional electricity. Thanks to its pack-level optimization, the Smart String ESS improves energy throughput by 2%-5% during its service life, which further reduces electricity costs.

B. Active Safety: The inverter is equipped with an AI-powered arc fault circuit interrupter (AFCI), which received the highest Level 4 certification from the CGC, to ensure safety for customers. The AFCI can detect arc fault locations in modules and distinguish noises from electric arcs, effectively eliminating false alarms and omissions. The combination of the leading SSLD-TECH and the AFCI provides dual protection for the system with precise DC fault detection and emergency disconnection. The four layers of ESS protection can prevent safety hazards, system faults and potential failures, drastically improving system safety.

C. Smart O&M: The installation of the optimizer enables module-level management and real-time monitoring of the power plant operation, cutting O&M costs by 50%. The automatic SOC calibration of the ESS saves on personnel site visits and reduces O&M costs.

IV. Residential Smart PV Solution 3.0: FusionSolar for a Better Life

Following the launch of the “1+3+X” Residential Smart PV Solution 2.0 in 2021, Huawei this year presented the upgraded “1+4+X” design. Featuring a smart energy controller which connects a module controller, an ESS, an EV charger and a management system, the integrated solution enables a smart power consumption ecosystem. This enhances the PV self-consumption rate to 90% from 70% in the previous generation, bringing an all-round clean energy experience to homes with lower electricity costs, active safety, and intelligent assistance.

EV Charger (FusionCharge AC AP07/22N-EU): To enable low-carbon living, Huawei has launched a new solar EV charger for residential use, with easy indoor and outdoor installation, delivering convenient fast charging.

A. Optimal Electricity Cost: Slimmer and lighter, the brand-new SUN2000-600W-P Smart Module Controller performs well for high-power modules. The flexible design coupled with the optimizer is suitable for any rooftop while supporting shading conditions and multi-directional installation. Power generation can go up by 27%, as seen in a pilot case study. Compact and stylish, the Smart String ESS supports modular configurations and delivers high power throughput, allowing customers to enjoy efficient, clean energy.

B. Active Safety: The industry-leading AFCI technology can accurately detect arc faults and disconnect the inverter in 0.5 seconds. Meeting NEC 2017, which is one of the most stringent international safety standards, the smart optimizer supports automatic and manual activation in an emergency to bring the voltage of rooftop modules to zero. This helps to prevent electric shocks with rapid disconnection. The ESS also complies with VDE2510, one of Germany’s strictest standards in system safety. All of these minimize the safety hazards of a residential PV system to give customers peace of mind.

C. Intelligent Assistant: The AI energy management assistant EMMA can offer accurate estimations of PV power generation and household electricity consumption by learning from big data about weather conditions and user habits. It automatically adjusts the system for the best working mode, delivering clean solar power while ensuring comfort.  

The combination of PV and ESS provides backup power during outages, ensuring the smooth running of important appliances such as security systems, lighting equipment and refrigerators, eliminating customer concerns about continuous power supply at home.

V. Smart Micro-grid Solution: Clean and Reliable Power Supply

According to World Bank, 840 million people live in off/unstable grid areas, where electricity from oil is still common. This traditional way of power generation results in high carbon dioxide emissions, high costs, and low efficiency, contributing to the widespread problem of the energy divide. Huawei has launched the Smart Micro-grid Solution to deliver optimal LCOE for 100 MW micro-grid projects with energy storage, providing a clean, safe, and reliable power supply with higher energy output and lower costs.

A. Optimal LCOE and Reliable Power Supply

The solution supports the seamless online transition of medium-voltage off/on-grid changeover and off-grid fault ride-through effectively, to avoid power outage loss of US$2 million/MW compared to traditional power generation from oil. The solution delivers optimal power quality, helping to achieve zero-carbon generation and eliminate the energy divide.

B. Reduced System Costs

Compared to traditional power generation from oil, Huawei’s Smart Micro-grid Solution saves LCOE by over 50%. Adopting a 2:1 PV/BESS ratio, the solution can reduce initial configurations by up to 50%.

C. Active Safety

Equipped with SSLD-TECH, the Smart String Inverter enhances the active safety of power plants. The Smart String ESS features four-layer active shutdown and two-level passive isolation, preventing risks from the outset.

Huawei integrates information and communications technology (ICT), power electronics and energy storage, and continues to collaborate with customers and business partners worldwide to build a low-carbon environment. The company is focused on achieving its goal of zero carbon and accelerating carbon neutrality for a greener, better future.

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