摘要电力系统的惯性是影响系统频率稳定性的重要参数，较大的惯性可减小系统 出现有功扰动后频率变化的速率和幅度。而基于电力电子变流器的变速风电机 组，由于风力机转速与系统频率解耦，其对电力系统转动惯量几乎没有贡献。随 着风电渗透率的增加，将导致系统的惯量及系统频率稳定性的降低，因此，为了 实现有功支持，在变速风电机组运行特性及控制的基础上，将系统频率变化与风 力机转速变化联系起来，提出了虚拟惯量的控制策略。该策略通过系统频率的变 化来调节风力机转速，从而释放机组的动能，提供频率支持，从而提高了基于变 速风电机组的大规模风电场接入电网后的电力系统频率稳定性。80206

毕业论文关键词 频率控制 动能 风力发电 虚拟惯量 最大功率跟踪

Title Design and implementation of Virtual inertia control

Abstract The inertia of electric power system is an important parameter that affects the frequency stability of the system。 The large inertia can reduce the rate and amplitude of the frequency change after the active power disturbance。 The variable speed wind turbine based on power electronic converter has little contribution to the moment of inertia of the power system due to the decoupling of the speed of the wind turbine and the frequency of the system。 With the increase of wind power penetration, the inertia of the system and the frequency stability of the system will be reduced。 Therefore, in order to realize the active power, based on the operating characteristics and control of the variable speed wind turbine, the system frequency change is connected with the speed change of the wind turbine, and the control strategy of the virtual inertia is put forward。 The strategy adjusts the speed of the wind turbine by changing the frequency of the system, thereby releasing the kinetic energy of the unit and providing the frequency support, so as to improve the frequency stability of power system based on large scale wind farm connected to power system based on variable speed wind power generator。

Keywords  frequency regulation   the kinetic energy wind power generation maximum power point tracking virtural inertia

目 录

1。 绪论 1

1。1 课题的研究背景 1

1。2 惯性控制研究现状综述 1

1。3 本文主要研究内容 3

2。 风力发电基础原理 4

2。1 变速风电机组的模型 4

2。1。1 风力机的气动模型 4

2。1。2 风力机的机械传动模型 5

2。2 变速风电机组的运行控制特性 6

2。3 MPPT控制模型 7

3。 变速风电机组的虚拟惯性控制 8

3。1