海上风电-储能系统联合运行与电压协同控制策略研究

【作者】 罗薇；

【导师】 刘志坚； 沈鑫；

【作者基本信息】 昆明理工大学 ， 电气工程（专业学位）， 2024， 硕士

【摘要】 在能源转型和“3060双碳目标”背景下,因资源丰富、不占用土地、可大规模开发等特点,我国海上风电装机容量逐年递增。随着海上风电场并网容量和离岸距离的增加,且海上风电出力具有随机性和波形性等特征,大规模海上风电直接并网对电网电压的稳定性造成严重威胁。目前我国海上风电场配置储能工程处于起步阶段,针对海上风电场配置储能的技术标准和规程规范还在制定中。传统海上风电场通常配置SVG、电容器等无功补偿设备,储能系统接入海上风电场后带来的多设备协同控制问题突出,本文针对协同电压控制问题展开研究,研究内容如下:(1)构建了海上风电机组的详细模型;然后,考虑尾流效应影响,以16机风场为例,对比分析了海上风电场与陆上风电场的差异性;最后,基于有功无功协调思想,提出了提升电网电压水平的风电机组无功主动控制策略,为后续研究内容的理论和模型提供支撑。(2)研究了 SVG协同的海上风电场无功电压控制策略。首先,研究了海上风电场的无功调节能力。然后,考虑SVG和DFIG风电场协同配合,构建了 SVG优先、风电场无功控制其次的无功电压控制策略。最后,通过仿真结果可知,当风电场并网点无功需求超过SVG的调节能力时,所提策略能够在海上风电场运行于并网准则允许的功率因数条件下,动态调节海上风电场无功输出能力,最终实现电压稳定的目标。(3)研究了海上风电场-SVG-储能系统电压协调控制技术。首先,搭建广东某海上风电场建立海上风电场-SVG-储能并网系统模型;然后,提出了计及储能调节能力的SVG优化配置方法;接着,考虑海上风电场、SVG和储能系统的调压特性,提出了一种海上风电场-SVG-储能多源参与的并网点电压控制策略;最后,通过仿真分析,验证了所提控制策略的有效性。更多还原

【Abstract】 In the context of energy transformation and the "3060 double carbon target",due to the characteristics of rich resources,no land occupation,large-scale development,China’s offshore wind power installed capacity is increasing year by year.With the increase of grid-connected capacity and offshore distance of offshore wind farms,and the randomess and waveform of offshore wind power output,large-scale offshore wind power directly connected to the grid poses a serious threat to the stability of grid voltage.At present,China’s offshore wind farm configuration energy storage project is in the initial stage,and the technical standards and regulations for offshore wind farm configuration energy storage are still being formulated.Traditional offshore wind farms are usually equipped with SVG,capacitors and other reactive power compensation devices,and the problem of multi-device cooperative control caused by the energy storage system connecting to offshore wind farms is prominent.This thesis studies the problem of cooperative voltage control,and the research contents are as follows:(1)The detailed model of offshore wind turbine is constructed;Then,taking 16 turbine wind farms as an example,the differences between offshore wind farms and onshore wind farms are compared and analyzed.Finally,based on the idea of active and reactive power coordination,the active reactive power control strategy of wind turbines to improve the voltage level of the grid is proposed,which provides support for the theory and model of the subsequent research content.(2)The SVG collaborative reactive voltage control strategy for offshore wind farms is studied.Firstly,the reactive power regulation capability of offshore wind farm is studied.Then,considering the cooperation of SVG and DFIG wind farms,a reactive power and voltage control strategy with SVG first and wind farm reactive power control second is constructed.Finally,through the simulation results,it can be seen that when the reactive power demand of the wind farm node exceeds the adjustment capacity of SVG,the proposed strategy can dynamically adjust the reactive power output capacity of the offshore wind farm under the power factor condition allowed by the grid-connection criteria,and finally achieve the goal of voltage stability.(3)The voltage coordination control techology of offshore wind farm SVG-energy storage system is studied.First of all,an offshore wind farm in Guangdong Province was built to establish an offshore wind farm-SVG-energy storage grid-connected system model.Then,the SVG optimization configuration method considering the energy storage adjustment ability is proposed.Then,considering the voltage regulation characteristics of offshore wind farm,SVG and energy storage system,an off-grid voltage control strategy involving multiple sources of offshore wind farm-SVG-energy storage is proposed.Finally,the effectiveness of the proposed control strategy is verified by simulation analysis.更多还原