【摘要】 为了给三相电压源型逆变器系统加入惯性和阻尼，将虚拟同步发电机(VSG)技术引入到控制设计当中，以改善系统的性能，但因逆变器内环控制采用线性控制方法，导致控制律的设计不够精确。为此，引入多指标非线性控制方法来设计控制策略，选取逆变器输出电压和输出电流的线性组合作为输出函数，根据微分几何理论证明系统能够反馈线性化，并求出非线性控制律。仿真结果表明，系统并网运行时频率的最大波动从50.35Hz减小到50.04Hz,验证了所提的VSG多指标非线性控制策略的有效性。更多还原

【Abstract】 In order to add inertia and damping to the three-phase voltage source inverter system, the virtual synchronous generator(VSG) technology is introduced into the control design to improve the performance of the system.However, due to the linear control method in the inner loop, the design accuracy of the system is not enough.Therefore, MNLC(Multi-index Nonlinear Control) is introduced to design the control strategy.The linear combination of inverter output voltage and inductance current is selected as the output function.According to the differential geometry theory, it is proved that the system can be feedback linearized, and the nonlinear control law is obtained.The simulation results show that the maximum frequency fluctuation of the system is reduced from 50.35 Hz to 50.04 Hz, which verifies the effectiveness of the proposed VSG multi-index nonlinear control strategy.更多还原