Therefore, Hangzhou Metro plans to build a DC intelligent lighting system, through power distribution, communication, control and other systems, to achieve the continuity of power supply and lighting, the system should have manual/automatic function, forced lighting function, to ensure the continuity of power supply when the system fails.

Customer needs:

The system openness and integration requirements
need to interact with the BAS system in real time, upload the lighting status and receive control instructions. Support the deployment of control software on the edge cloud platform to achieve unified control with the ICSC system. Optical fiber ring network + DC carrier communication network is used to reduce wiring costs.

Products with high reliability and high performance requirements
need to adapt to the humid and dusty environment of underground stations and interval vibration conditions; The overall energy efficiency of the system ≥ 94%, and the accuracy of voltage and current regulation is high. The core rectifier module needs N+1 redundancy design and supports hot-swappable maintenance. It has an insulation monitoring function to ensure the safety of electricity use.

Compliance and quality certification requirements
Products need to have CQC, 3C and other certifications; core components such as rectifier modules, monitoring units, and dimming modules must be independently developed; Key components such as circuit breakers and relays need to be selected from international first-line brands such as Schneider, ABB, and Siemens.

The full-cycle service guarantee needs
to provide full-process services from design liaison, prototype manufacturing, factory supervision to on-site installation and commissioning, training, and quality assurance. Supply within 60 days according to batch notification, 24-month warranty period, 1-hour response, 24-hour arrival at the site.

Intelligent scene control needs

It is necessary to realize independent dimming and scene switching in different areas of the station (platform, station hall, entrance and exit, section), and support various modes such as normal operation, shutdown, maintenance, and fire protection; The entrance and exit should be automatically dimmed according to natural light to achieve on-demand lighting; In case of emergency, it must be linked with the fire protection system to force the emergency lighting to be turned on in milliseconds.

Innovative solution: "Source-network-load-intelligence" integrated smart lighting system

In the face of challenges, Shenzhen Huiyeda Communication Technology Co., Ltd. has tailored intelligent lighting power system solutions for Hangzhou Metro with 30 years of power electronics technology accumulation. This set of "source-network-load-intelligence" integrated digital lighting management system solution that deeply integrates power electronics, Internet of Things and data analysis technology takes intelligent and high-reliability lighting power supply as the core of perception and control, and realizes the deep integration of power supply management, condition monitoring and policy control of global lighting equipment by building a multi-modal converged communication network and cloud-edge collaborative computing platform.

Complete the hardware upgrade from "traditional power supply" to "adjustable, controllable and measurable digital power supply", and at the same time realize the paradigm shift of the lighting business from "empirical operation and maintenance" to "intelligent operation" through data-driven, providing safe, energy-saving, efficient and continuous evolution of the overall value delivery of the smart light environment for various scenarios.

Core architecture: The system adopts a three-stage power distribution architecture, from the DC lighting master control cabinet to the sub-control box, forming a complete power supply and control network. Through optical fiber ring network + DC carrier communication networking, the cabling cost is greatly reduced while ensuring the reliability of signal transmission.

Technological innovation:

nN+1 redundancy design: The rectification module adopts N+1 redundancy configuration, and the failure of a single module does not affect the operation of the system, and the availability reaches 99.99%

n Coding Dimming Technology: Modulating the dimming signal through DC output, without additional control lines, the dimming accuracy is 0-100% stepless adjustable

n Insulation monitoring system: real-time monitoring of the positive/negative insulation resistance of each circuit to the ground, with an accuracy of ± of 10%, and automatic cutting off within 0.5 seconds in case of fault

nHot-swappable maintenance: The core module supports online hot-swappability, no downtime for maintenance, and the mean time to repair (MTTR) ≤ 30 minutes

Key products:

Intelligent lighting power control system  Product Features: ● Adopt advanced conversion technology, high power utilization, reduce energy consumption. ● It has voltage regulation and overload protection functions, adapts to wide voltage input, and ensures continuous and stable power supply. ● Integrated multiple protection mechanisms such as over-voltage, over-current, and short circuit, making it safe to use. ● Support dimming, remote monitoring or automated management to meet the needs of intelligent lighting scenarios. ● Comply with environmental protection standards, low noise design, and long-life components reduce maintenance costs. ● Compatible with a variety of lamp types, modular design for easy installation and expansion.

Scheme configuration:

Solution functions

Scheme features:

Energy efficiency value: data witnesses green transformation

According to preliminary estimates, the value brought by Huiye Da's intelligent lighting system to Hangzhou Metro far exceeded expectations:

Safe operations

• Millisecond response of fire linkage, 100% reliable emergency lighting

• Insulation monitoring real-time protection to eliminate potential leakage safety hazards

• Modular redundancy design eliminates the risk of a single point of failure

Economic cost reduction

• The overall energy efficiency of the system is ≥ 94%, which is highly efficient and energy-saving

• On-demand lighting strategy, comprehensive energy saving of 30%-50%

• Intelligent dimming control to avoid ineffective lighting waste

Management efficiency improvement

• Centralized monitoring platform, one-screen control of the lighting status of the whole line

• Automatic early warning of faults, from passive maintenance to active maintenance

• Historical data traceability provides decision-making support for energy efficiency optimization

Experience value

• Fine dimming in the partition creates a comfortable light environment

• Smooth dimming without flicker enhances the visual experience of passengers

• Scenario mode switches with one click to meet different operational needs

Future prospects: Smart light environment, continuous evolution

With the successful implementation of the Hangzhou Metro Smart Lighting Project, Huiyeda will continue to optimize the system algorithm to achieve more accurate crowd flow prediction and adaptive adjustment of lighting strategies. At the same time, the solution will also be extended to more urban rail transit projects to help the intelligent upgrading of China's urban infrastructure.