According to the data, in 2017 and 2018, the cumulative installed capacity of distributed photovoltaic in China was 29.66GW and 50.61GW, and it is expected that the cumulative installed capacity of distributed photovoltaic in China will reach 69.2GW in 2019. Behind a series of exciting figures, there is a multiplication of pressure on China's photovoltaic enterprises, due to the remaining manufacturers are becoming fewer and fewer, innovative products emerge in an endless stream, the phenomenon of homogenization will continue to intensify in the future, and price reductions can not make profits for enterprises, and it is bound to innovate on the basis of homogenization.

This veteran of power generation equipment in the field of new energy has keenly smelled this, and is practicing it on the road of innovation of 1500V system, energy storage, and intelligent operation and maintenance. The extent of Hewang's layout in new energy can be seen from the early application of distributed inverters in 2013 and the soaring speed of the frontrunner project in 2018 and 2019.

In particular, the implementation of the 5.31 New Deal last year brought a fatal blow to photovoltaic enterprises, and Hewang has sprung up, and has completed a comprehensive layout of inverter products in the photovoltaic field under the situation of maintaining good wind power performance, including distributed inverters, string inverters, intelligent operation and maintenance systems, etc., and has been fully prepared to meet the arrival of the era of parity.

PV inverters welcome parity

After photovoltaic parity on the grid, the industry will get rid of subsidies, in this case, the quality and technology of products have become the focus of the photovoltaic industry. Reducing costs and increasing efficiency has become an inevitable trend to promote grid parity, and 1500V system solutions are one of the important directions to achieve the goal of grid parity.

In recent years, the 1500V system has been more mature in foreign markets, and the 1500V system has been favored in large-scale ground power station projects abroad.

1500V installed capacity in foreign markets in 2018

As can be seen from the table, 1500V systems are widely used in Europe, the Middle East, and Latin American markets, with a total installed capacity of more than 17GW. According to the IHS Markit report, in the next two years, the scale of global 1500V photovoltaic power plants will exceed 100GW, accompanied by the inverter as the core, to achieve the cost reduction of modules, components, brackets, cables and other supporting industries.

At the time when the door to domestic parity is about to open, the focus of all aspects of domestic photovoltaic has also shifted, and many owners and design institutes have begun to grab 1500V photovoltaic power stations.

It is worth noting that the star series of 1500V centralized boost inverter all-in-one machine developed by Hewang is reported that the product is suitable for various harsh environments such as high temperature, high humidity and high altitude, with a single capacity of 1.25MW and 1.56MW respectively, and a single unit capacity of 2.5MW in the future; And it has the function of night SVG, and the double-winding transformer can be used for multi-machine parallel connection, and the cost of box transformer is lower.

1500V centralized boost inverter all-in-one machine

Zhao Pin, deputy general manager and marketing director of Hewang PV product line, revealed: "Compared with the traditional centralized inverter, the power generation of the 1500V centralized booster inverter all-in-one machine is increased by 2% for flat ground; If the ground is uneven, the power generation can be increased by 5%-8%. ”

Zhao Pin, deputy general manager and marketing director of Hewang photovoltaic product line

As we all know, due to the influence of more flexible power station system design and lower life cycle maintenance costs, string inverters have been widely used, accounting for 60.4% of the market. This year has entered the year of bidding, the distributed photovoltaic market is rapidly expanding again, string inverters are still one of the main solutions for enterprises, and 20K string inverters have been launched on the product map of Hewang 2019, which are mainly used in residential photovoltaics and industrial and commercial rooftop photovoltaics. It is understood that the DC input voltage of this product is 1100V, with the characteristics of dual-channel MPPT, high-precision intelligent string detection, etc., which is not only compact in structure, easy to install and maintain, but also has a built-in AC and DC lightning protection module and lightning protection. At the same time, the product also supports APP monitoring, which can grasp the power station information in real time and fully escort customers.

Officially relying on the advantages of wind power technology, Hewang is handy in the performance of the photovoltaic market. Today, the inverter developed by Hewang has been running safely and stably for 8 years, and in addition to performing well in the mainstream market of string inverters, the distributed inverters with a relatively small share have also achieved good results.

The early application of distributed inverters and their frequent appearances in the leader projects also show that the product is becoming more and more mature, the failure rate is very low, and the stability and power generation still have great advantages. Zhao Pin said: "With the advent of the parity window, the future distributed inverter still has a certain degree of sustainable competitiveness. ”

layout

The introduction of the 5.31 policy last year made the photovoltaic industry "emergency brake", the cost of all links in the industrial chain fell sharply, the subsidy was greatly reduced, and the pace of grid parity is getting closer and closer. Judging from the introduction of the 5.30 bidding subsidy policy this year, the 5.31 policy last year is the inevitable trend of the development of the industry, the photovoltaic market is gradually picking up, and most enterprises are gradually releasing production capacity to meet a new round of competition.

Zhao Pin said: "The photovoltaic competition is becoming more and more fierce, the company will continue to strengthen technological innovation, improve the original string inverter, centralized inverter, distributed inverter, focus on large-scale ground power stations, leader, photovoltaic poverty alleviation, industrial and commercial rooftops, household photovoltaic, at the same time, increase the overseas layout of photovoltaic and energy storage market, as well as the development of intelligent operation and maintenance market, we have made comprehensive preparations." ”

According to CNESA statistics, as of the end of March 2019, the cumulative installed capacity of energy storage projects in operation worldwide reached 181.2GW, a year-on-year increase of 3.2%. The integration and mutual penetration of energy storage on the grid side, power generation side and user side is constantly strengthening, and the multiple application value of energy storage is gradually being demonstrated.

It is understood that the 500kW and 630kW energy storage converters produced by Hewang support 4 grid-connected charging and 2 grid-connected discharge modes, support reactive power output, reactive power regulation and off-grid start, and cooperate with the monitoring system to stop the charging and discharging of faulty batteries, and can also cooperate with the energy management system to achieve peak shaving and valley filling functions, anti-islanding effect protection and other characteristics. The product has actual cases on the grid side, the power generation side, and the user side.

630kW energy storage converter

Although the introduction of the "531" policy last year suddenly entered a "frozen period", the development of the industry is more reasonable and orderly. According to the National Energy Administration, as of the end of March 2019, the country's installed photovoltaic power generation capacity reached 179.7 million kilowatts, a year-on-year increase of 28%. The industry predicts that the average annual new photovoltaic installed capacity in 2019 and 2020 will reach about 40GW. The market transaction of photovoltaic power plant assets has also accelerated, and the power plant asset market is relatively active. However, because O&M has not formed a market and is in its infancy, the performance of existing power stations is not good.

Aiming at this market demand, Hewang solves the difficulties of existing power stations through intelligent operation and maintenance. It is reported that the intelligent hopeView platform developed by Hewang collects data to achieve intelligent monitoring and data management, a one-stop solution, which not only provides convenience for customers, but also saves costs.

To sum up, the strength of Hewang's products is obvious to all, all of which stems from the customer's recognition of inverter products, and is also the driving force for Hewang to move forward on the road of innovation.