Resilient and Sustainable Tie-Line Bias Control for a Power System in Uncertain Environments
Resilient and Sustainable Tie-Line Bias Control for a Power System in Uncertain Environments
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DOI：
10.1109/tetci.2020.3042812
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发表时间：
2022-02
影响因子：
5.3
通讯作者：
Iroshani Jayawardene;G. Venayagamoorthy;Xingsi Zhong
中科院分区：
文献类型：
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作者：
Iroshani Jayawardene;G. Venayagamoorthy;Xingsi Zhong
大规模光伏（PV）电力渗透的互连电力系统会引入频率和联络线潮流波动。这是由于光伏发电的可变性和不确定性特性造成的。这使得自动发电控制（AGC）变得更具挑战性。换句话说，将系统频率和联络线功率流维持在期望值（也称为“联络线偏置控制”）是很困难的。本文通过预测光伏发电量和母线频率，提出了一种增强联络线偏置控制方法。研究了具有由相量测量单元（PMU）组成的大型光伏电站的网络物理两区域电力系统。使用由 PMU 组成的同步相量网络可以使电力系统平稳运行，克服光伏发电波动性和不确定性的挑战。然而，在电力系统控制中使用 PMU 会造成网络攻击的漏洞，从而可能危及电力系统的运行。结果表明，使用虚拟同步相量网络 (VSN) 进行频率预测可以减轻拒绝服务 (DoS) 攻击对物理 PMU 的影响。在不同的天气和负载条件下研究了增强的 AGC 性能，包括 2017 年 8 月 21 日^{st}$ 的“美国大日食”期间的天气情况。典型结果表明，增强型 AGC 结构在不确定的环境中提供了弹性且可持续的联络线偏差控制。
Interconnected power systems with large-scale penetration of photovoltaic (PV) power introduce frequency and tie-line power flow fluctuations. This is due to the variability and uncertainty characteristics of PV power. This makes automatic generation control (AGC) to be more challenging. In other words, maintaining system frequencies and tie-line power flows at the desired values, also known as “tie-line bias control” is difficult. In this paper, an enhanced tie-line bias control method is proposed by predicting PV power generation and bus frequencies. A cyber-physical two-area power system with a large PV plant consisting of phasor measurement units (PMUs) is studied. The use of synchrophasor networks consisting of PMUs can enable smooth power system operations overcoming the challenges of PV power variability and uncertainty. However, the use of PMUs in power system control creates vulnerabilities for cyber-attacks that could jeopardize the power system operations. It is shown that the frequency prediction using a virtual synchrophasor network (VSN) can mitigate the impact(s) of denial of service (DoS) attacks on physical PMUs. Enhanced AGC performance is investigated under different weather and load conditions including a weather profile during the “Great American Eclipse” of August $21^{st}, 2017$. Typical results indicate that the enhanced AGC structure provides a resilient and sustainable tie-line bias control in uncertain environments.