ThisDetail Design and Technical Implementation chapter presents a technical framework for designing virtual power plants (VPPs), critical to digitalized grids and the energy Internet, featuring a layered architecture with four core components: distributed energy resources (DERs), communication networks, data platforms, and intelligent applications, all aligned with industry standards and security protocols. DER design integrates distributed generation, controllable loads, and energy storage, utilizing IoT and AI for real-time digital mapping, forecasting, and optimal scheduling to enhance grid stability and renewable energy adoption, supported by smart sensors and edge devices for monitoring and actuation. The communication layer employs 5G and advanced technologies to establish secure, low-latency bidirectional channels between control centers, DERs, grid platforms, and markets, ensuring reliable data flow. The data platform standardizes data collection, cleansing, aggregation, and visualization (via maps, dashboards) to track resource status, facilitating informed decisions. Intelligent applications drive demand response, market trading, and ancillary services (e.g., frequency regulation) through AI, big data, and machine learning, optimizing forecasting, scheduling, and revenue, with modules for market registration, contracts, settlement, and evaluation enabling seamless participation. A pilot integrating solar PV, batteries, and flexible loads demonstrates stability improvements and cost reduction, leveraging cloud-edge-end IoT, 5G/private networks, and scalable cloud infrastructure. Software integration connects VPPs to external systems, with user interfaces for monitoring and transaction control, emphasizing “software-network-hardware” synergy to unify energy, information, and business flows, advancing renewable integration and grid resilience.