Driven by the "dual carbon" goal, distributed photovoltaics have become the core choice for industrial enterprises, commercial complexes, parks, and other scenarios to achieve green transformation due to their advantages of cleanliness, efficiency, and nearby consumption. More and more companies are deploying distributed photovoltaic power plants to reduce electricity costs while fulfilling their social responsibility and environmental commitments.

However, with the expansion of distributed photovoltaic projects and the decentralization of layout, the pain points of traditional extensive operation and maintenance models are becoming increasingly prominent: scattered power stations, high manual inspection costs, and untimely fault diagnosis leading to loss of power generation efficiency; The operation data of the equipment relies on manual recording, which cannot grasp the real-time health status of the power station; The process of power generation statistics and revenue accounting is cumbersome, and the accuracy of data is difficult to guarantee... These problems not only constrain the economic benefits of photovoltaic power plants, but also become a "stumbling block" for enterprises to scale up their photovoltaic assets.

How to break the deadlock? The transition from "extensive operation and maintenance" to "intelligent control" is an inevitable trend for the high-quality development of the distributed photovoltaic industry. The AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform launched by Ankerui Electric, with "data-driven+intelligent operation and maintenance" as its core, creates a full lifecycle photovoltaic power station management solution for enterprises, truly achieving efficient, safe, and profitable operation of photovoltaic assets.

1. Background

According to Document No. 206 of the National Development and Reform Commission Energy [2022], priority should be given to supporting the integration of biomass energy generation such as rooftop distributed photovoltaic power generation and biogas power generation into the power grid in rural areas, and power grid enterprises should prioritize the purchase of their power generation capacity.

The Notice of the National Energy Administration on Submitting the Pilot Plan for the Development of Distributed Rooftop Photovoltaics in Counties (Cities, Districts) states that "in order to accelerate the development of distributed rooftop photovoltaics, it is proposed to organize and carry out pilot projects for the development of distributed rooftop photovoltaics in counties (cities, districts) throughout the country.

2. AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform

2.1 Say goodbye to manual dependence and control all photovoltaic power plants with just one click

In the traditional operation and maintenance mode, operation and maintenance personnel need to travel between multiple power stations, and a single inspection is time-consuming and labor-intensive. There may also be cases of missed inspections or misjudgments. The AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform of Ankerui can real-time collect operational data of inverters, combiner boxes, meters and other equipment, including key information such as power generation, voltage and current, equipment temperature, fault alarms, etc., by deploying intelligent collection terminals in photovoltaic power stations.

Enterprise managers only need to log in to the computer or mobile platform to view the operating status of all distributed power plants with one click, achieving "global control without leaving home". Whether it's rooftop power stations located in urban parks or distributed projects in remote factory areas, all data can be synchronized and visualized in real time, bidding farewell to the inefficient mode of "manual meter reading+on-site inspection".

2.2 Intelligent alarm+precise diagnosis, nip faults in the bud

The timeliness of power plant fault handling directly determines the magnitude of power generation losses. In traditional operation and maintenance, equipment failures are often discovered during inspections, and the loss of power generation during this period is difficult to recover.

The AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform is equipped with intelligent fault diagnosis algorithms, which can monitor equipment operating parameters in real time. Once problems such as abnormal current, inverter shutdown, and component obstruction occur, the platform will immediately send alarm notifications through SMS, APP push, email, and other methods, while accurately locating the fault location and type. Operations personnel can carry professional tools directly to the fault point based on the alarm information, greatly reducing the time for fault investigation and repair.

In addition, the platform can also predict potential hidden dangers of equipment through historical data comparison and analysis, realizing the transition from "passive repair" to "active prevention", and maximizing the guarantee of stable operation of the power station.

2.3 Empowering decision-making with data to maximize the returns on photovoltaic assets

For enterprises, the core value of photovoltaic power plants lies in stable power generation revenue. However, under the traditional operation and maintenance mode, power generation statistics and revenue accounting rely on manual sorting, which is not only inefficient but also prone to data errors, and cannot provide effective support for power plant optimization.

The AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform of Ankerui has refined energy consumption analysis and revenue management functions. The platform can automatically generate daily/monthly/annual power generation reports and revenue statistics reports, clearly displaying the power generation efficiency and investment return of each power station. At the same time, by analyzing the power generation data of power stations in different periods and regions, the platform can provide professional solutions such as component cleaning suggestions and grid connection strategy optimization for enterprises, helping them tap into the power generation potential of power stations and improve the overall return on photovoltaic assets.

2.4 Not only for operation and maintenance, but also for building a closed loop of photovoltaic management ecosystem

The value of the AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform from Ankerui goes far beyond equipment monitoring and fault handling. As a mature photovoltaic asset management system, the platform also supports multi role permission management, operation and maintenance work order circulation, historical data tracing and other functions, meeting the management needs of different entities such as enterprises, operation and maintenance service providers, and regulatory departments.

From the grid connected operation of the power station to daily operation and maintenance, fault handling, and revenue accounting, the platform has built a fully integrated management ecosystem loop, truly realizing the "unmanned and intelligent control" of distributed photovoltaic power stations.

3. Platform functions

3.1 Comprehensive Kanban

Provide functions such as power generation monitoring, installed capacity recording, power generation statistics, and photovoltaic revenue calculation. At the same time, it can also calculate carbon dioxide emissions reduction and save tons of standard coal, presenting intuitive data and charts to users, allowing enterprises to clearly understand the operational benefits and environmental contributions of photovoltaic power plants. Through comprehensive dashboards, enterprise managers can quickly grasp the overall operation status of the power station and provide data support for decision-making.

3.2 Power Station Monitoring

Covering functions such as power generation monitoring, environmental monitoring, video monitoring, and inverter status inquiry. Real time monitoring of power generation data from power stations, such as power generation capacity, power generation efficiency, etc; Collect environmental data, including temperature and humidity, wind speed, irradiance, etc., in order to analyze the impact of environmental factors on power generation; Real time monitoring of the power plant site through video surveillance; Always check the operating status of the inverter to ensure the stable operation of the power station.

3.3 Inverter Monitoring

Support functions such as querying AC/DC electrical parameters (supporting historical curves), calculating annual utilization hours of inverters, and calculating inverter revenue. Through the power irradiance curve, users can intuitively understand the operating status of the inverter under different lighting conditions, analyze its performance and efficiency, and promptly identify potential problems and optimize them.

3.4 Photovoltaic Distribution Diagram

Clearly display information such as inverter AC/DC parameter monitoring, environmental monitoring, and inverter model records. Data is refreshed in seconds, and graphics support custom modification to meet the personalized management needs of enterprises. Enterprises can customize the photovoltaic distribution diagram based on their own power station layout and equipment conditions, providing a more intuitive view of the power distribution and equipment operation of the power station.

3.5 Power Plant Power Generation Report

Supports querying at any time of day, month, and year, and supports exporting reports. Enterprises can easily obtain power generation data reports from power stations for data analysis, financial accounting, energy auditing, and other work. For example, the finance department of the enterprise accurately calculates the power generation revenue and cost of the photovoltaic power station through the exported power generation report every month.

3.6 Alarm Information

Provide alarm information recording and alarm classification and grading functions. Supporting custom grading, different alarm levels can be set according to the severity of the fault, ensuring that enterprises can handle important alarm information in a timely manner. When the power station equipment malfunctions, the platform will immediately issue an alarm notification, and the operation and maintenance personnel can respond quickly according to the alarm level and take corresponding measures.

3.7 Video Surveillance

Support multi-channel video surveillance, support pan tilt control and playback function. Enterprises can monitor the real-time operation of equipment and personnel activities at the power plant site through video surveillance to ensure the safe operation of the power plant. Meanwhile, the video playback function can be used for accident tracing and analysis, providing a basis for optimizing operation and maintenance management.

3.8 Equipment Definition and Operation and Maintenance Management

Support device information customization and operation event scoring function. Provide functions such as operation ticket management, task publishing, and task recording to achieve a closed-loop operation and maintenance management. Enterprises can define detailed information about power station equipment for easy management and maintenance; By scoring operation and maintenance events, the quality and efficiency of operation and maintenance personnel can be evaluated, and the management of the operation and maintenance team can be continuously optimized.

3. system hardware

3.1Distributed photovoltaic islanding protection

According to the technical regulations for photovoltaic power stations connected to the power system GB/T 19964-2012, photovoltaic power stations should be equipped with independent anti islanding protection devices, with an action time of no more than 2 seconds. Anti islanding protection should also be coordinated with grid side line protection. There are requirements for the voltage, frequency, and power quality of the grid connection point.

The islanding refers to the state where a portion of the power grid, including loads and sources, continues to operate in isolation after being disconnected from the main grid. Islands can be divided into unplanned islands and planned islands.

3.2Distributed photovoltaic power quality monitoring

The APView500 series power quality online monitoring device integrates functions such as harmonic analysis, waveform sampling, voltage sag/sag/interruption, flicker monitoring, voltage imbalance monitoring, event recording, and measurement control. It can meet the requirements of distributed photovoltaic power generation systems connected to the grid at voltage levels of 0.4-35kV and is widely used for power quality monitoring of distributed photovoltaic grid connection points in industries such as industrial plants, commercial rooftops, logistics bases, airport transportation, and high-speed service areas.

3.3Distributed photovoltaic wireless temperature measurement

According to the requirements of GB 763-90 "Heating of AC High Voltage Electrical Appliances during Long term Operation". NB/T 42086 2016 "Technical Requirements for Wireless Temperature Measurement Devices": The electrical contact online temperature measurement device is suitable for temperature monitoring of cable joints, circuit breaker contacts, knife switch, high-voltage cable intermediate heads, dry-type transformers, low-voltage high current and other equipment in high and low voltage switchgear. It prevents excessive contact resistance caused by oxidation, looseness, dust and other factors during operation, which can lead to heating and become a safety hazard, improve equipment safety guarantee, timely, continuously and accurately reflect equipment operation status, and reduce equipment accident rate.

4. Conclusion

At the critical stage of transitioning from "large-scale layout" to "high-quality operation" in distributed photovoltaics, the AcrelCloud-1200 distributed photovoltaic operation and maintenance cloud platform of Ankerui is driving the iterative upgrading of enterprise photovoltaic operation and maintenance models with the power of technological innovation. Say goodbye to extensive management and embrace intelligent control. Ankerui will continue to safeguard the safe and efficient operation of enterprise photovoltaic assets, helping more enterprises steadily and far on the path of green development.