Stochastic Distribution System Operation Considering Voltage Regulation Risks in the Presence of PV Generation
Stochastic Distribution System Operation Considering Voltage Regulation Risks in the Presence of PV Generation
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DOI：
10.1109/tste.2015.2433794
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发表时间：
2015-06
影响因子：
8.8
通讯作者：
Yashodhan P. Agalgaonkar;B. Pal;R. Jabr
中科院分区：
文献类型：
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作者：
Yashodhan P. Agalgaonkar;B. Pal;R. Jabr
可变过压、过多的抽头数量和电压调节器 (VR) 失控状况是配电网在适应光伏 (PV) 发电的同时面临的主要运营挑战。基于离线模拟计算电压设定点来实现电压控制的传统方法不考虑预测误差。在这项工作中，提出了一种考虑负载和辐照度预测误差的随机最优电压控制策略。过压和 VR 失控等随机操作风险是通过机会约束优化 (CCO) 问题定义的。通过引入称为“Tap Tail Expectation”的随机指数，这种减轻失控的经典公式得到了进一步改进。公式中考虑了功率损耗和过多抽头数量最小化等运营目标。提出了一种采样方法来解决 CCO。与其他电压控制装置一起，光伏逆变器电压支持功能得到协调。使用真实的配电系统模型和实际测量的辐照度进行仿真研究，以证明所提出技术的有效性。所提出的方法对于配电系统运营商来说是一个有用的操作程序。该方法可以最大限度地减少馈线功率损耗、避免电压违规并减轻 VR 失控。
Variable over voltage, excessive tap counts, and voltage regulator (VR) runaway condition are major operational challenges in distribution network while accommodating generation from photovoltaics (PVs). The conventional approach to achieve voltage control based on offline simulation for voltage set point calculation does not consider forecast errors. In this work, a stochastic optimal voltage control strategy is proposed while considering load and irradiance forecast errors. Stochastic operational risks such as overvoltage and VR runaway are defined through a chance constrained optimization (CCO) problem. This classical formulation to mitigate runaway is further improved by introducing a stochastic index called the Tap Tail Expectation. Operational objectives such as power losses and excessive tap count minimization are considered in the formulation. A sampling approach is proposed to solve the CCO. Along with other voltage control devices, the PV inverter voltage support features are coordinated. The simulation study is performed using a realistic distribution system model and practically measured irradiance to demonstrate the effectiveness of the proposed technique. The proposed approach is a useful operational procedure for distribution system operators. The approach can minimize feeder power losses, avoid voltage violations, and alleviate VR runaway.