The field of energy systems is witnessing a significant shift towards the integration of quantum security solutions to protect against increasingly sophisticated cyber threats. Researchers are exploring the application of quantum key distribution (QKD) and blockchain technology to ensure the secure and efficient operation of decentralized energy markets and virtual power plants. This trend is driven by the need for information-theoretic security guarantees and the potential of QKD to provide long-term protection against quantum attacks. Notable papers in this area include: Q-EnergyDEX, which proposes a zero-trust distributed energy trading framework driven by QKD and blockchain, demonstrating robust key stability and near-optimal social welfare. The Techno-Economic Feasibility Analysis of Quantum Key Distribution for Power-System Communications, which presents an integrated techno-economic framework to evaluate the feasibility of QKD for secure power-system communications, revealing clear breakeven zones where QKD-enhanced deployments become cost-effective.