Voltage stress minimization by optimal reactive power control
Voltage stress minimization by optimal reactive power control
复制标题
通过最佳无功功率控制最小化电压应力
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
F. Bullo
中科院分区：
文献类型：
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作者：
M. Todescato;J. Simpson;F. Dörfler;R. Carli;F. Bullo
电力系统中的一个标准操作要求是电压幅值位于预先指定的范围内。传统的工程智慧表明，这种严格调节的配置文件，强加系统设计的目的和良好的网络运行，也应该保证一个安全的系统，远离静态分叉不稳定性，如电压崩溃。然而，总的来说，这两个目标是不同的，必须分别执行。我们制定了一个优化问题，最大限度地提高电压崩溃的距离，通过注入无功功率，受潮流和操作电压的约束。通过利用线性近似的潮流方程，我们到达一个凸的重新制定，可以有效地解决最佳注入。我们还解决了规划问题的资源分配，通过重铸我们的问题，在稀疏促进框架，使我们能够选择所需的折衷之间的最优注射和所需的执行器的数量。最后，我们提出了一个分布式算法来解决优化问题，表明它可以实现在线反馈控制器。我们用IEEE30总线网络说明了我们的结果的性能。
A standard operational requirement in power systems is that the voltage magnitudes lie within prespecified bounds. Conventional engineering wisdom suggests that such a tightly-regulated profile, imposed for system design purposes and good operation of the network, should also guarantee a secure system, operating far from static bifurcation instabilities such as voltage collapse. In general however, these two objectives are distinct and must be separately enforced. We formulate an optimization problem which maximizes the distance to voltage collapse through injections of reactive power, subject to power flow and operational voltage constraints. By exploiting a linear approximation of the power flow equations we arrive at a convex reformulation which can be efficiently solved for the optimal injections. We also address the planning problem of allocating the resources by recasting our problem in a sparsity-promoting framework that allows us to choose a desired trade-off between optimality of injections and the number of required actuators. Finally, we present a distributed algorithm to solve the optimization problem, showing that it can be implemented on-line as a feedback controller. We illustrate the performance of our results with the IEEE30 bus network.