分布式功率不平衡分配控制的电力系统暂态特性
Transient Performance of Power Systems with Distributed Power-Imbalance Allocation Control
摘要：
研究了分布式功率不平衡分配控制（DPIAC）控制的电力系统暂态性能对控制律参数的敏感性。将负荷扰动建模为高斯白噪声，利用H_2范数度量系统的频偏和控制代价。对于具有与电网拓扑相同的通信网络的电力系统，分析表明，通过单一的控制增益系数加速频率向标称值的收敛，可以大大改善频率的暂态性能。然而，控制成本随着该控制增益系数的增大而线性增大。因此，在反馈控制律DPIAC中，在频率偏差和由该控制增益系数确定的控制成本之间存在折衷。通过增加另一个控制增益系数，可以在过渡阶段期间随着边际成本的加速一致而降低控制成本。此外，当边际成本的共识加速时，国家的行为接近于集中控制律。
英文摘要：
We investigate the sensitivity of the transient performance of power systems controlled by Distributed Power-Imbalance Allocation Control (DPIAC) on the parameters of the control law. We model the disturbances at power loads as Gaussian white noises and measure the transient performance of the frequency deviation and control cost by the H_2 norm. For a power system with a communication network of the same topology as the power network, analysis shows that the transient performance of the frequency can be greatly improved by accelerating the convergence of the frequencies to the nominal value through a singe control gain coefficient. However, the control cost increases linearly as this control gain coefficient increases. Hence, in the feedback control law, DPIAC, there is a trade-off between the frequency deviation and control cost which is determined by this control gain coefficient. By increasing another control gain coefficient, the control cost can be decreased with an accelerated consensus of the marginal costs during the transient phase. Furthermore, the behavior of the state approaches that of a centralized control law when the consensus of the marginal costs is accelerated.
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