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Adaptive Damping Factor Control Strategy of Inverter Interfaced Distributed Generators Based on Virtual Synchronous Generator Technology

机译:基于虚拟同步发电机技术的逆变式分布式发电机自适应阻尼因子控制策略

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With development of new energy, inverter interfaced distributed generator (IIDG) has become one of the main types of distributed generator. Its control strategy has great influence on the dynamic behavior of distribution network. Conventional control modes can not provide inertia and are prone to instability. Based on the technology of virtual synchronous generator (VSG), the active power and frequency (P-ω)) control, voltage and reactive power (Q-v) control and the inner loop control of IIDG are optimized respectively. The stability model is established after the transfer function of the system is derived, and the effect of damping factor on the output of the IIDG is analyzed. Based on the mechanism of stability, an adaptive damping control strategy is proposed. The strategy takes the deviation of output power as feedback and it can adaptively regulate the damping factor of the IIDG system. Hence the system has the advantages of fast response speed and small dynamic fluctuation. The strategy is evaluated by simulations based onPSCAD/EMTDC, which indicate that the adaptive damping control strategy has remarkable better dynamic performance compared with the fixed damping factor.
机译:随着新能源的发展,逆变接口分布式发电机(IIDG)已成为分布式发电机的主要类型之一。其控制策略对配电网的动态行为有很大影响。传统的控制模式不能提供惯性,并且容易产生不稳定。基于虚拟同步发电机(VSG)技术,分别优化了IIDG的有功功率和频率(P-ω)控制,电压和无功(Q-v)控制以及内环控制。在推导系统传递函数后,建立了稳定性模型,并分析了阻尼因子对IIDG输出的影响。基于稳定性机理,提出了一种自适应阻尼控制策略。该策略以输出功率的偏差作为反馈,可以自适应地调节IIDG系统的阻尼系数。因此,该系统具有响应速度快,动态波动小的优点。通过基于PSCAD / EMTDC的仿真对策略进行了评估,结果表明,与固定阻尼因子相比,自适应阻尼控制策略具有显着更好的动态性能。

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