OPF-Based CVR Operation in PV-Rich MV–LV Distribution Networks
OPF-Based CVR Operation in PV-Rich MV–LV Distribution Networks
复制标题
光伏丰富的中低压配电网络中基于 OPF 的 CVR 操作
DOI：
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发表时间：
2019
影响因子：
6.6
通讯作者：
L. Ochoa
中科院分区：
文献类型：
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作者：
Luis Gutierrez;L. Ochoa
传统上，在一次变电站和分布式发电不常见的情况下，采用适度的设置来应用保护电压降低（CVR）。然而，随着新的基础设施在欧洲式中压（MV）和低压（LV）网络中的部署，在光伏（PV）渗透水平不断提高的推动下，开发更先进的CVR方案的机会出现了。本文提出了一种集中式的，三相交流最优潮流（OPF）为基础的CVR计划，使用监控，有载分接开关和电容器跨越中压和低压，积极管理电压，以尽量减少能源消耗，即使高光伏渗透，同时考虑MV-LV的限制。为了解决离散变量带来的可扩展性问题，提出了一种两阶段的方法来解决OPF作为一个非线性规划问题（放松整数变量）。采用持续检查客户电压的过程，以仅在需要时触发优化。此外，CVR的好处不仅在网络层面上量化，而且对客户也是如此，为政策制定者提供了有用的见解。建议的控制评估使用现实的，不平衡的英国。住宅MV-LV网络（2，400+客户），具有高光伏渗透率以及1分钟分辨率时变配置文件和负载模型。结果表明，所提出的控制有效地协调在MV和LV水平的电压调节全天，最大限度地减少所有客户的能源进口。
Conservation voltage reduction (CVR) has been traditionally applied adopting moderate settings at primary substations and when distributed generation was uncommon. However, as new infrastructure is deployed across European-style medium voltage (MV) and low voltage (LV) networks, driven by increasing photovoltaic (PV) penetration levels, the opportunity arises to develop more advanced CVR schemes. This paper proposes a centralized, three-phase AC optimal power flow (OPF)-based CVR scheme that, using monitoring, on-load tap changers and capacitors across MV and LV, actively manages voltages to minimize energy consumption, even with high PV penetration, while considering MV–LV constraints. To tackle scalability issues brought by discrete variables, a two-stage approach is proposed to solve the OPF as a non-linear programming problem (relaxing integer variables). A process that continuously checks customer voltages is adopted to trigger the optimization only when needed. Moreover, CVR benefits are not only quantified at a network level but also for customers, providing useful insights to policy makers. The proposed control is assessed using a realistic, unbalanced U.K. residential MV–LV network (2,400+ customers) with high PV penetration, and 1-min resolution time-varying profiles and load models. Results demonstrate that the proposed control effectively coordinates voltage regulation in MV and LV levels throughout the day, minimizing energy imports for all customers.