协调太阳能电池混合发电厂和同步发电机,提高黑启动能力

IF 4.8 2区 工程技术 Q2 ENERGY & FUELS Sustainable Energy Grids & Networks Pub Date : 2024-08-02 DOI:10.1016/j.segan.2024.101489
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引用次数: 0

摘要

可再生能源发电利用的是基于逆变器的技术,这与它所取代的煤炭和核能同步机器有很大不同。电网是围绕大型同步电机设计的,这些同步电机可提供恒定的可调度功率,并具有抑制频率干扰的固有惯性。电网保护系统基于大型发电机提供的高可用故障电流。可再生能源发电厂的燃料供应可变,没有惯性,为系统保护提供的故障电流较小。由可再生能源、储能和同步发电机组成的混合发电厂可在停电后恢复电力系统运行方面发挥重要作用。本文提出了一种改进的方法,利用基于逆变器的资源(IBR)和现有的同步发电机来提高黑启动能力,同时最大限度地降低整个系统的运行成本,并提供额外的辅助电网服务。电池储能系统的建模采用电网形成逆变器,为同步装置提供黑启动,而太阳能系统的建模采用电网跟随逆变器。开发了一种长短期记忆(LSTM)来模拟辅助负载,以减少同步发电机的燃料消耗并降低成本。进行了几项案例研究,以验证带有电池储能的并网逆变器在启动最大的直接在线(DOL)和软启动电机时的性能。利用一年的实际同步发电机辅助负载数据,进行了准动态模拟分析,以确定黑启动的储能需求。最后,通过对混合动力系统进行为期一年的模拟,估算出太阳能装置的能源效益。通过将输出功率限制在实际数据范围内,并减少同步发电量以考虑太阳能发电和减少的辅助负荷,进行了减少燃料燃烧模拟。研究发现,IBR 资源能够成功黑启动同步发电机,减少燃料消耗,并从太阳能发电厂获得额外收入。
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Coordination of solar battery hybrid power plants and synchronous generators for improving black start capability

Renewable generation utilizes inverter-based technology which is much different than the coal and nuclear synchronous machines it is replacing. The electrical network was designed around big synchronous machines providing constant dispatchable power and innate inertia to dampen frequency disturbances. The network protection system is based on high available fault current provided by the big generators. The renewable plants have a variable fuel supply, no inertia, and provide less fault current for system protection. A hybrid power plant with renewables, energy storage, and a synchronous generator can play a significant role in restoring power system operation after the occurrence of a blackout. This paper presents an improved method to utilize inverter-based resources (IBR) with existing synchronous generation to improve the black start capability while minimizing the overall system’s operation cost and providing additional ancillary grid services. A battery energy storage system is modeled with grid forming inverters to provide black start to the synchronous unit while the solar is modeled with grid following inverters. A Long-Short Term Memory (LSTM) is developed to model the auxiliary load for reducing the fuel consumption in synchronous generators and reducing the cost. Several case studies are conducted to verify the performance of the grid forming inverters with battery storage to start the largest direct online (DOL) and soft start motors. Utilizing actual synchronous generator auxiliary load data for a year, a quasi-dynamic simulation analysis is performed to determine energy storage requirements for black start. Finally, the energy benefits of the solar installation are estimated from simulating the hybrid system for 1 year. A reduced fuel burn simulation is performed by constraining the export power to the actual data and reducing synchronous generation to account for the solar generation and the reduced auxiliary load. The study finds that the IBR resources are capable of successfully black starting the synchronous generator and reducing fuel consumption and earning additional revenue from the solar plants.

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来源期刊
Sustainable Energy Grids & Networks
Sustainable Energy Grids & Networks Energy-Energy Engineering and Power Technology
CiteScore
7.90
自引率
13.00%
发文量
206
审稿时长
49 days
期刊介绍: Sustainable Energy, Grids and Networks (SEGAN)is an international peer-reviewed publication for theoretical and applied research dealing with energy, information grids and power networks, including smart grids from super to micro grid scales. SEGAN welcomes papers describing fundamental advances in mathematical, statistical or computational methods with application to power and energy systems, as well as papers on applications, computation and modeling in the areas of electrical and energy systems with coupled information and communication technologies.
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