According to the latest data from the National Energy Administration, as of September 2014, the total installed PV power in China has reached 20 GW. At the 14th China Photovoltaic Conference closed recently, several representatives of experts said that with the continuous increase of China's photovoltaic power station inventory, the operation and maintenance of the power station will become an important guarantee for testing 25 years of sustainable investment returns. Affect the investment confidence of banks, funds and investors. Wu Xiexiang, chief engineer of Guodian Photovoltaic Co., Ltd., said: "Non-smart, no investment!"
Difficult challenges in traditional operation and maintenance – high operation and maintenance costs, long troubleshooting cycles, and power station benefits
The reporter understands that in recent years, the installed capacity of our country's single-unit power station has been rising, from several MW in the early stage to several tens of MW and even hundreds of MW. Taking a 100 MW power station as an example, it covers an area of more than 3,000 mu and has more than 400,000 installed components. Therefore, how to maintain and manage hundreds of thousands or even millions of photovoltaic modules within the power station through intelligent means and ensure that Maintaining the best state of power generation during the 25-year life cycle, and timely detection of damage to components or other accessories in the power station, has become a major challenge for power plant owners and investors.
Previously, a person in charge of long-term operation and maintenance of the first line of work told reporters that the current power station because there is no string monitoring or only a simple string of data acquisition, monitoring and measurement accuracy is not high, the measurement data is not accurate. The monitoring system's communication data failure up to 90%. The main problem is that due to the traditional single RS-485 bus upload method, the transmission rate is low, communication failures are numerous, and false alarms and missed reports are severe. Due to the huge number of PV power plant components and nodes and the lack of effective fault location methods, fault detection mainly depends on manual stations, manual measurement and comparison through multimeters, long fault handling cycles, influencing power generation output, low maintenance efficiency, and huge investment.
It seems that traditional photovoltaic power plant operation and maintenance methods have been unable to meet the increasingly rapid development of the demand for photovoltaic operation and maintenance, the contradiction is more and more prominent. In particular, with the increasing popularity of big data, cloud technologies, and 4G networks that have been accompanied in recent years, there is a growing demand for more efficient and smarter homeowners. However, it is undeniable that the special nature of China's photovoltaic industry and China's non-power subsidy policies in previous years have led companies to pay more attention to product sales, and they remain only at the theoretical level for the ever-changing Internet IT technology and intelligent operation and maintenance supervision.
Huawei took the lead in the industry to propose a smart photovoltaic power plant solution that drastically reduced the cost of operation and maintenance and boosted the revenue of the power station.
As an advocate of intelligent photovoltaic power plant solutions, Xu Yingtong, general manager of Huawei's intelligent photovoltaic power plant solutions, told reporters: “The main purpose of the smart photovoltaic power plant solution should be: to increase power generation to protect revenue, and to operate and maintain the cost effectively. , to achieve sustainable and stable power generation and maximize customer value in the 25-year life cycle of the power plant through a simple and fully digital concept." At the end of 2013, Huawei took the lead in the industry to propose a smart photovoltaic power plant solution. Based on the photovoltaic power conversion and power transmission network, Huawei integrated digital information technology, next-generation communication technology, and power electronics technology across fields to increase power generation output of power plants (ground The power generation capacity of the power station increased by more than 5%, and the power generation of rooftop and mountainous power stations increased by more than 8%), and the efficiency of operation and maintenance was improved by more than 50%.
It is understood that Huawei's smart photovoltaic power plant solutions mainly include the following aspects:
· With a new generation of smart inverters as the core, high power generation efficiency, high intelligence, and strong monitoring and control capabilities;
· Innovative transmission and networking solutions, the introduction of eLTE trunking communication technology and PLC carrier communication technology, improved data transmission capabilities, reliability and deployment flexibility;
· The new operation and maintenance model with photovoltaic professional terminal and App as the core to enhance the operation and maintenance efficiency;
· Based on cloud computing, the globalization of automatic operation and maintenance, management of multi-power station;
· Comprehensive analysis of big data to achieve preventive operation and maintenance
It is worth mentioning that in terms of operation and maintenance, Huawei took the lead in introducing UAV technology into the inverter industry to achieve rapid patrol inspection; through UAV technology, it can achieve large-scale rapid patrol of PV arrays at large ground power stations. Enhance the operation and maintenance efficiency in a variety of scenarios, such as the mountain power station and Yuguang complementary power station.
Since mid-June 2014, Huawei has conducted comprehensive operation and maintenance inspections of smart inverters, lines, and systems for a number of photovoltaic power plants throughout the country. According to feedback from the current inspection, Huawei's intelligent inverters operate stably under various adverse weather conditions. After adopting Huawei's intelligent photovoltaic power station solution to transform the project, the amount of power generation has increased significantly; Huawei Smart PV Power Station The solution is simple in wiring and less in points of failure, making the power station safer and more reliable. At the same time, the inspection team also discovered some detailed problems that occurred during the construction of the power station and recorded detailed records, such as the rusting of the bracket of the power station battery board, the unscrewed screws of the grounding terminal of the power station, and the leakage of copper from the cable. The problem is effectively fed back to the customer so that the company can conduct direct and effective troubleshooting and avoid potential safety hazards.
Power generation increased significantly year-on-year – Smart PV power stations are favored by customers
Wu Jiannong, president of Zhejiang Tongjing New Energy Group, told reporters that after comparing the results of actual measurement data of the company's AOSTEC PV project, it was found that the products using Huawei's smart PV power plant solutions increased power generation by 10% compared to other products. Before the company's investment in Jianglin County, Zhejiang Province Fenglin Zhen Nongguang complementary 30MW photovoltaic power plant started, Wu Jiannong personally led the team to Huawei headquarters to understand face to face intelligent photovoltaic power plant solutions, visit the laboratory, feel Huawei's corporate culture, initially contributed to the same scene The 30MW agricultural light complementary projects use Huawei's solutions. The latest power generation statistics show that since the on-line connection on September 10, the 30MW project adopting the intelligent photovoltaic power station solution and the self-tracking tracking system has been surpassing the average daily for more than 5 hours, and has increased by more than 30% year-on-year.
According to the report, 50.63% of users are most concerned about the yield of photovoltaic power plants; 94.34% of users consider the quality of their products when selecting inverter products; 79.24% of users are using inverter products currently in use. Is satisfied; 38.36% of users are not satisfied with the after-sales service of the product, followed by quality and price; for the future competition of inverter products focus, technology and services account for the largest proportion, followed by the price.
From the survey results, we see the focus of the customer - "benefit, quality, service." Only by thinking and solving problems from the perspective of customers can we win the favor of customers. Huawei's smart photovoltaic power plant solution that was first proposed in China has solved many of the issues most concerned to customers, which not only greatly increased the amount of power generation, but also solved the problems of low efficiency and high costs that existed in the operation and maintenance of photovoltaic power plants in the past. Therefore, customers no longer have to worry about, and customers naturally have no reason to refuse to choose smart photovoltaic power plants. In 2014, Huawei's smart photovoltaic power plant solutions were used on a global scale. The value of high-efficiency power generation, smart operation and maintenance, and safety and reliability has been widely recognized in the industry.
The latest report of the authoritative analyst firm IHS shows that for the first time in the second quarter of 2014, Huawei entered the top ten suppliers of photovoltaic inverters in the world. During the quarter, Huawei contributed 3.7% of global inverter sales, ranking the ninth-largest global PV supplier, and also the highest-selling Chinese supplier.
Non-intelligent, no investment! The era of smart power plants has come. Are you out?
