Distributed control subject to constraints on control inputs: A case study on secondary control of droop-controlled inverter-based microgrids
Distributed control subject to constraints on control inputs: A case study on secondary control of droop-controlled inverter-based microgrids
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DOI：
10.1109/iciea.2014.6931333
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Fanghong Guo;C. Wen
中科院分区：
文献类型：
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作者：
Fanghong Guo;C. Wen
通过基于下垂控制逆变器的微电网（MG）二次控制的案例研究，我们说明了受控制输入约束的分布式控制问题。为了消除一次控制带来的频率偏差，同时保持有功功率和无功功率共享特性，所设计的分布式控制器需要满足稳态下二次频率控制输入成比例的要求。为了解决这样的限制，我们提出了一种设计分布式二次控制器的方案，该方案在本地分布式发电（DG）上实现。通过允许这些控制器与其相邻控制器进行通信，所提出的控制策略可以实现令人满意的有功功率和无功功率共享精度，同时将频率恢复到标称值。经过测试的 MG 系统仿真验证了我们提出的控制策略。
Through a case study in the secondary control of the droop-controlled inverter-based microgrid (MG), we illustrate the problem of distributed control subject to constraints on the control inputs. In order to eliminate the frequency deviation caused by the primary control while keeping the real and reactive power sharing property, the designed distributed controllers need to meet the requirement that the secondary frequency control inputs should be in proportion in the steady state. To address such a constraint, we propose a scheme to design distributed secondary controllers, which are implemented on the local distributed generations (DGs). By allowing these controllers to communicate with their neighboring controllers, the proposed control strategy can achieve satisfactory real and reactive power sharing accuracy while restoring the frequency to the nominal values. A tested MG system simulation validates our proposed control strategy.