分布式电源接入场景下的电网振荡攻击建模与检测

The increasing distributed renewable resources (DERs) will introduce more vulnerabilities to smart grids. In this scenario, attackers can change the power output of DERs in the distribution network, and finally disturb the secure operation of crucial devices such as generators in the transmission network. To secure the operation safety and stability in smart grids, it is necessary to study the threats and relevant defense strategies under the scenario with high penetration of DERs. First, a novel attack model is proposed based on power system dynamics model, which could can cause power system oscillation with minimal attack costs via coordinated control of DERs maliciously. Second, in consideration of current oscillation detection algorithms' limitations, a heuristic attack detection method is proposed. The simulation-based case studies demonstrate that the proposed attack could threat power system operational safety with minimal costs, and the detection method can effectively locate the real attack sources.