Application of 10kV Power Supply and Distribution Engineering
Abstract:The intelligent distribution and monitoring system emerged as a product of the digital and information age, and has been extensively applied in high/low voltage transformation and distribution systems across various fields such as building complexes, sports venues, research facilities, airports, transportation, hospitals, power, and petrochemical industries. Acrel's self-developed Acrel-2000 series monitoring system can monitor the operational status of high-voltage switch cabinets, low-voltage switch cabinets, emergency generators, and record various parameters such as monitored electrical quantities and switch states. It generates warnings and alarms when parameter values exceed allowable limits and controls relevant equipment; it also collects data from distribution rooms such as temperature and humidity, water immersion, smoke detection, access control, and video surveillance, enabling environmental monitoring and security surveillance functions. This article introduces the application of the Acrel-2000 series monitoring system in a 10kV power supply and distribution project for the handball competition hall at the Asian Games, achieving intelligent management through distributed collection and centralized control, providing a solid technical guarantee for the safe, reliable, and efficient operation of on-site equipment.
Keywords:Intelligent Power Distribution Monitoring System, Monitoring and Control, Environmental Monitoring
Project Overview and Requirements
This project is an expansion project, utilizing 10KV dual power supply. The first 10KV incoming power source is derived from the 110KV Chuanhua Transformer's 10KV Luxiao A634 line, newly established at the Yazuai G12 bay. The second 10KV incoming power source is sourced from the 110KV Shunba Transformer's 10KV Shuning A394 line, at the Shunjiu G12 bay. This phase includes the installation of a new substation (Handball Gym Substation), equipped with two 1600KVA dedicated transformers and matching high and low voltage switchgear, responsible for powering the handball gym.
Figure 1: Diagram of the newly constructed system
Figure 2: Handball Gym Substation Layout Plan
This project requires the provision of a substation power monitoring system and auxiliary monitoring system, with specific requirements being:
Real-time data collection, one-line diagram display and operation, event alarms, and curve and power classification management.
2. Real-time display of power consumption status and other information within the power distribution room.
3. Features include intelligent fault analysis, load analysis, equipment档案, and power consumption statistics information upload.
4. Offer a low-voltage primary system diagram interface for easy system maintenance and communication status monitoring.
5. Report inquiries and printing, user permission management, etc.
6. Monitor and analyze the real-time changes in temperature and humidity, ventilation, and indoor water accumulation in the distribution room.
7. Controls dehumidifiers, water pumps, and access control systems.
The system boasts practicality, security, real-time capabilities, stability, and ease of maintenance.
Design Standards and Criteria
The monitoring system is an interconnected layout of various secondary equipment, sensors, network devices, and computer equipment. Depending on the project scale, functional performance, importance, and user investment level, different topological structures can be adopted. However, regardless of the chosen topology, a layered distributed design approach of "station control management layer – network communication layer – field equipment layer" is employed. This layered design aligns with current standards for communication system design and implementation, enabling relative monitoring and control functions at each layer. This means it can achieve remote monitoring and control, and also ensures that the functionality of the current and lower layers is not affected in the event of an upper layer failure.
Figure 3: Protection Configuration Diagram
Figure 4: Environmental Monitoring System Communication Topology Diagram
The system design also complies with the following standards:
Hardware Equipment Selection
Based on project requirements and drawings, configurable equipment for the project can be provided.
4 On-site Installation
Environmental Monitoring System: Uploads real-time temperature and humidity data, water immersion status, smoke detection status, and other data to the system host, forwards temperature, humidity, and SF6 gas data. The Acrel-2000E/A is placed at the entrance of the electrical room for inspection personnel to check the environmental status inside before entering, to avoid the risk of excessive harmful gas concentrations endangering their safety. The temperature and humidity sensors are equipped with a 485 communication interface and can communicate via the standard ModBus-RTU protocol; the water immersion sensors monitor indoor and outdoor cable trench water accumulation caused by external environmental conditions and various factors, with internal power supply, inductive wire, and signal output isolated; cameras are networked with local recorders via Ethernet cables, storing real-time monitoring videos and event information on local hard drives, and transmitting video images to the control host via Ethernet; the infrared microwave dual-sensing探测器 overcomes the limitations of single-technology detectors, triggering an alarm and uploading alarm information to the back-end system when both types of detection technology sensors detect human movement.
5 Software Features
1. Real-time Monitoring
The monitoring system features a user-friendly human-machine interface, displaying a single-wiring diagram and the operational status of the distribution room equipment. It also provides real-time monitoring of electrical parameters and environmental data within the distribution room.
2. Data Collection and Processing
The monitoring system can collect real-time and scheduled data on various electrical parameters and switch states of field equipment (including three-phase voltage, current, switch positions, and equipment operating status), directly display the collected data, or generate new, intuitive data information through statistical calculations before displaying it (total system power, maximum load, power factor limits, etc.), and store critical information in a database.
3. Curve Query
On the Curve Query interface, you can directly view the telemetry parameter curves, including temperature, humidity, water level, harmful gases, voltage, and current curves.
4. Operation Reports
Check the operational data reports for equipment in the electrical room, including daily, monthly, annual, and inquiry reports.
5. Real-time Alerts
The monitoring system features real-time alert capabilities, enabling it to issue alerts for events such as distribution room temperature, humidity, harmful gases, equipment failures, or communication issues.
6. Remote Control Operation
The monitoring system allows for remote control operations of equipment within the entire distribution system range.
7. Video Surveillance
The monitoring system can be integrated with cameras for remote surveillance.
Conclusion
This article introduces the application of the Acrel-2000 series monitoring system in the 10kV power supply and distribution engineering of the Asian Games handball venue construction. The system is centered around a three-tier topology structure, providing unified management of on-site electrical equipment. It features communication management, real-time monitoring, curve query, real-time alerting, historical event inquiry, and video surveillance. It can analyze, process, and display collected data in real-time. For events, it offers pop-up prompts, voice alerts, and SMS alarms, and generates various data reports, analysis curves, and graphics, facilitating maintenance personnel in understanding the equipment's operational status. This has significantly improved the reliability, safety, and automation level of the power supply and distribution system with minimal investment.
Reference:
Shanghai Ankerui Electrical Co., Ltd. Product Manual. 2010.08 Edition.
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