A unified framework for frequency control and congestion management
A unified framework for frequency control and congestion management
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DOI：
10.1109/pscc.2016.7541028
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发表时间：
2016-06
期刊：
影响因子：
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通讯作者：
Changhong Zhao;Enrique Mallada;S. Low;J. Bialek
中科院分区：
文献类型：
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作者：
Changhong Zhao;Enrique Mallada;S. Low;J. Bialek
电力系统中现有的频率控制框架受到下部惯性和更挥发性的电源的挑战。我们为频率控制和拥塞管理提出了一个新的框架。我们制定了一个优化问题，以重新平衡功率，恢复名义频率，恢复区域间流量并维持在其极限以下的线流量，以最小化控制成本的方式。成本可以是与参考世代的平方偏差，从而最大程度地减少了最后一次最佳调度的破坏。因此，我们的控制可维护系统安全性，而不会干扰市场运营。通过得出一种原始的偶算法来解决此优化，我们设计了一个完全分散的初级频率控制，而无需在参与代理之间进行明确的通信，以及一个集成了主要和次要频率控制和拥堵管理的分布式统一控制。模拟表明，统一控制不仅实现了系统均衡中所有所需的控制目标，而且与传统的控制方案相比，瞬态也改善了瞬态。
The existing frequency control framework in power systems is challenged by lower inertia and more volatile power injections. We propose a new framework for frequency control and congestion management. We formulate an optimization problem that rebalances power, restores the nominal frequency, restores inter-area flows and maintains line flows below their limits in a way that minimizes the control cost. The cost can be squared deviations from the reference generations, minimizing the disruption from the last optimal dispatch. Our control thus maintains system security without interfering with the market operation. By deriving a primal-dual algorithm to solve this optimization, we design a completely decentralized primary frequency control without the need for explicit communication among the participating agents, and a distributed unified control which integrates primary and secondary frequency control and congestion management. Simulations show that the unified control not only achieves all the desired control goals in system equilibrium, but also improves the transient compared to traditional control schemes.