The project was able to achieve good frequency modulation assessment results, thanks to a set of primary frequency modulation transformation plans that have been polished in practice. The project is deeply optimized around PCS/BMS collaborative logic, control strategy and parameter tuning. The scheme does not stay at the theoretical level, but has been fully tested in the real scheduling environment of Jilin power grid, which has the practical value of stable landing and replicable promotion.
Anchor the policy dividend of Jilin power grid, and dig into the maximum benefit of the "peak shard + frequency modulation" composite scenario
Jilin Province has continuously improved the market mechanism of independent energy storage auxiliary services, supported the synchronous participation of energy storage in peak shading, primary frequency modulation, secondary frequency modulation and other businesses, and opened up multiple income channels such as capacity compensation, electricity energy trading and auxiliary services. As a new energy base with tens of millions of kilowatts in Northeast China, Baicheng has a large scale of grid connection, which puts forward higher requirements for the frequency support capacity of energy storage and the peak absorption capacity of new energy, and also brings broad development opportunities for the energy storage industry.
At present, on the basis of maintaining the stable and reliable primary frequency modulation performance of Shangdian Linhai Energy Storage Power Station, the project team continues to cooperate with the station operator, deeply conforms to the Jilin power grid market rules, and continuously optimizes the system operation strategy. Through scientific overall scheduling, taking into account the auxiliary service ability of primary frequency modulation and the operation demand of peak shard business, balancing the operation logic of frequency modulation standby and peak shard charge and discharge, actively exploring the composite operation path of peak shard and frequency modulation, striving to excavate the comprehensive operation benefit of the station, and creating a practical sample for the independent commercial operation of energy storage in Jilin Province.
From combat to equipment: Output model guidelines for vanadium flow battery FM track
The frequency modulation service of power grid has very strict requirements for the response speed, control accuracy, working condition adaptability and long-term operation reliability of the energy storage system. Lithium energy storage has completed a complete field verification in the power Linhai project; With the technical endowment of intrinsically safe and long cycle life, all-vanadium flow battery is also a technical route with great development potential in power grid frequency regulation scene.
At the 26th China International Industry Expo, Electric Energy storage released a 2MW/1MWh all-vanadium liquid flow frequency modulation dedicated energy storage system, which carried out directional technology upgrades for frequency modulation scenarios, improved system regulation rate, response speed and control accuracy, and optimized thermal reserve energy consumption level under frequency modulation conditions. The product adopts integrated container prefabrication design to reduce the difficulty of site installation and shorten the construction period. The system has completed the field commercial empirical operation of the power station, and the frequency modulation assessment has performed well, which can support the primary and secondary frequency modulation business at the same time.
It initiates empirical thinking of frequency modulation and helps all-vanadium flow battery to expand frequency modulation application scenarios
Control strategy is the core gripper: frequency modulation capability is not only a simple integration of hardware equipment, but also needs to hone the coordination mechanism of PCS and battery management system, closed-loop control logic and working condition adaptation parameters to fully match the requirements of power grid assessment rules.
Take the real power grid operation as the inspection standard: it is not only possible to refer to the laboratory and factory test results, the system performance needs to be operated in the field for a long time with working conditions, and the official frequency modulation assessment results of the power grid are used as the actual ability evaluation basis.
Adapt to complex business scenarios to carry out system design: frequency modulation energy storage cannot be limited to a single frequency modulation function. The system architecture and operation logic need to take into account both peak regulation and electric energy trading, and adapt to the composite business model of "peak regulation + frequency modulation" in new energy provinces such as Jilin.
Pay attention to the full dimension assessment index system: In addition to all kinds of qualified rate indicators, the adaptation ability of the system to the actual working conditions of the power grid and the continuous and stable response ability are important dimensions to evaluate the comprehensive strength of FM energy storage.
In the future, with the continuous development of new power system construction in Jilin Province and large-scale grid connection of new energy, the demand for frequency modulated energy storage in the grid will continue to be released. Electric energy storage will enable Shangdian Linhai energy storage power Station to continuously precipitate on-site operation data and iteratively improve the operation strategy; At the same time, we look forward to accelerating the industrialization of all-vanadium liquid flow frequency modulation equipment, combining advanced energy storage equipment with the actual operation experience of the project, jointly exploring a safe and efficient development path of energy storage frequency modulation with feasible business model, helping the high-quality development of new energy in Northeast China, and serving the landing of the "double carbon" strategic goal.
