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| The wind reservoir is deeply integrated, and changes are also unchanged |
| Release time:2023-01-06 11:00:39| Viewed： |
The wind reservoir is deeply integrated, and changes are also unchanged
Since the 14th Five Year Plan, with the gradual progress of the dual carbon goals, the transformation of the energy structure is the decisive factor in the short and medium term decarbonization process. Clean power, represented by wind power and photovoltaic, is increasing year by year in terms of total installed capacity and power generation. The quantitative change of new energy power generation will completely change the power production mode of traditional power system, which is "source follows load".
In this process, the volatility and intermittency of new energy power generation have also become one of the problems that need to be solved urgently. When the power grid cannot ensure sufficient strong adjustment capacity, the safe supply of power will face severe challenges. In this context, relevant national departments and local governments have continuously strengthened the deployment of new energy storage development goals, industrial layout, and policy mechanisms, and comprehensively promoted the development of "wind power+energy storage" as one of the industrial trends.
However, facing different application scenarios such as centralized and distributed wind power, how should wind power+energy storage be built? As one of the earliest enterprises involved in wind power converters and grid energy storage in China, Sungrow Power Supply provides different focuses and solutions for the needs of centralized and decentralized wind power configuration and energy storage. At present, its full scenario energy storage solutions for wind power have been widely applied and recognized in scenarios such as auxiliary wind power grid connection, power frequency modulation and peak shaving, demand side response, etc.
At present, centralized energy storage, which is connected to the power grid in the booster station on the power side of the wind farm, is the main form of wind storage integration. The energy storage system is configured according to a certain proportion of the wind farm capacity. With the energy storage battery compartment and the energy storage converter booster compartment as the basic units, it is centrally arranged to receive the centralized dispatching operation of the power grid. Centralized energy storage gathers the capacity of the energy storage system in scale, which can give full play to the advantages of energy throughput of the energy storage system.
In the centralized energy storage, the most important thing to pay attention to is the safety of energy storage. In view of the safety requirements, Sungrow Power took the lead in introducing the safety design concept of the four tiered energy storage system of "prevention, protection, elimination and release" in the industry. From the perspective of preventing the generation of excitation sources, avoiding the induction and diffusion of thermal runaway, coordinated control and comprehensive management, the safety hazards of the energy storage power station are eliminated. The solar power energy storage battery system adopts high-performance intelligent cooling design. According to the cell temperature, and even in combination with the external input of the system, operating conditions, meteorological data, etc., it can better predict and maintain the continuous operation of the entire energy storage system in the optimal temperature range, effectively extend the battery life, and make the energy storage system operate more safely and stably.
In the distributed application scenario, the distributed wind power storage system is an application type of wind power joint energy storage with wind turbine as the unit. The energy storage conversion unit and wind power converter are centrally configured at the side of the wind turbine set. The battery system flexibly adopts the layout of "one machine, one storage" or "multiple machines, one storage" according to the actual scenario to achieve the joint operation and unified dispatching of wind power converter generation and energy storage system.
Although the centralized wind farm energy storage and the decentralized wind turbine energy storage are consistent in a broad sense, the centralized energy storage distributed at each access point can also be regarded as a decentralized energy storage system from the grid perspective. However, in the scenario application, there are still differences between the two - the dispatching and operation of centralized energy storage system should take into account not only the needs of the power grid, but also the operating characteristics of the wind farm. The centralized energy storage system will show more differentiated needs in terms of the configuration of hourly electricity with the development of the power grid.
This requires a more flexible energy storage configuration mode to further release different application scenarios of wind storage. "Wind storage integration" has become an innovative solution and one of the trends of industry development.
It can be said that decentralized wind power storage is a deep integration of wind power transformation and energy storage transformation, which fundamentally and profoundly changes the operating characteristics of wind turbines. The joint operation control of wind power storage simplifies the difficulty of grid dispatching, and is expected to play a greater role in decentralized wind farms, functional wind turbine access and other scenarios. At the same time, the wind turbine is matched with the energy storage system, which makes up for the shortage of the wind turbine that has no sustainable backup energy, and significantly improves the friendliness of wind power connection to the grid while the auxiliary wind power converter operates.
In the CWP International Wind Energy Exhibition in 2021, Sungrow Power released a wind storage integrated converter, which consists of a 6.6MW doubly fed wind power converter DC side matched with a 10% power energy storage converter unit. Through the integrated control of wind power conversion and energy storage conversion, the converter deeply integrates the scene based application of wind power conversion and energy storage functions.
The energy storage conversion unit of the solar power wind storage converter adopts a modular compact design, which has a millisecond level fast power response, is compatible with battery energy management, and is suitable for multiple types of batteries. The DC side coupling has higher power conversion efficiency. Drive the application type of wind power joint energy storage with wind turbine as the unit, so as to optimize the inertia and frequency modulation of wind turbine, wind power consumption and grid connected power quality.
Adapting measures to local conditions, scientific design, efficient utilization and grid friendliness are the key technologies for wind farms to configure energy storage systems, and are also the high-quality development needs of wind power in the process of achieving carbon neutrality. Under the goal of "reaching the peak of carbon" in 2030, Sungrow Power will continue to promote the integration and innovation of wind storage, comprehensively lead the development and innovation of wind power conversion technology, commit to becoming a world-class wind power technology and equipment supplier, and continue to provide more wind power value-added services for customers. |
