The Ankrui User Substation Transformer and Distribution Monitoring Solution is a comprehensive monitoring and management system designed for user substations. The following is a detailed introduction to the solution:

1、 Overview of the Plan

This scheme mainly targets the demand side user substations with voltage levels of 110KV/35kV and below, providing a hierarchical and distributed substation monitoring and management system. The system collects various types of information within the substation for analysis, warning, and control, thereby ensuring the reliable, safe, and orderly operation of the entire process of user transformation, distribution, and power consumption.

2、 Ankerui System Architecture and Solutions

2.1 System Architecture

The scheme mainly includes secondary equipment such as microcomputer protection device, arc protection device, intelligent control device, contact temperature measurement product, partial discharge monitoring device, power quality monitoring/multifunctional instrument, environmental sensor, as well as monitoring system/EMS platform.

These devices communicate with the monitoring system through RS485 bus or Ethernet, supporting multiple transmission protocols such as IEC60870-5-103, IEC 60870-5-104, Modbus RTU, ModbuS TCP, etc.

2.2 Monitoring Solution for 110kV and Below User Substations

For substations of 110kV and below, various information in the substation is collected through secondary equipment such as microcomputer protection devices, arc protection devices, intelligent control devices, contact temperature measurement products, partial discharge monitoring devices, power quality monitoring/multifunctional instruments, environmental sensors, etc., and analyzed, warned, and controlled by the monitoring system/EMS energy efficiency management platform to ensure the reliable, safe, and orderly operation of the entire process of user transformation, distribution, and power consumption. The monitoring scope of the system includes user substations, switch stations, substations, low-voltage distribution rooms, DC systems, as well as the environment and video surveillance of power transformation and distribution.

2.2.1 Microcomputer protection device and integrated automation system

2.2.2

Topology of microcomputer protection device and integrated automation system

Substation Integrated Automation System:

Monitoring subsystem: including telemetry and remote signaling of analog signals, switch signals, and electrical energy data; Event recording SOE and fault waveform recording; Remote control function;

Microcomputer protection subsystem: including incoming common measurement and control screen; Main transformer protection measurement and control screen; Mother Union PT、 Other circuit protection functions such as capacitors;

Microcomputer Five Prevention System: The integrated automation system and microcomputer five prevention system are linked to achieve the five prevention and misoperation prevention functions within the station;

Voltage and reactive power comprehensive control subsystem: functions such as compensating capacitors, reactance, and on load voltage regulation; Low frequency load shedding control of the system; Low voltage load shedding, low-frequency load shedding devices, etc; Backup power self switching control; Equipped with automatic switching devices, fast switching, etc;

Internal control power system: including DC screen, AC screen, etc;

Substation remote control scheduling: including the functions of remote control upload scheduling and gateway meter data upload in Zone I of the substation.

2.2.3 Microcomputer protection device and comprehensive automation system protection configuration

AM6 series protection devices: fiber optic differential protection, line protection, main transformer differential protection, main transformer backup protection, main transformer measurement and control, main transformer non electric quantity, operation box, public measurement and control, bus differential protection, fault disconnection, motor comprehensive protection, capacitor protection, backup automatic switching protection, PT monitoring parallel harmonic elimination;

AM5SE series protection devices: line protection, main transformer differential protection, main transformer backup protection, main transformer measurement and control, main transformer non electric quantity, motor comprehensive protection, capacitor protection, backup automatic switching protection, PT monitoring parallel harmonic elimination;

Microcomputer protection device and integrated automation system 110kV substation:

Microcomputer protection device and integrated automation system 35kV substation:

2.3 System Functions

2.3.1 Real time monitoring

Telemetry, remote signaling, SOE

2.3.2 Main Transformer Monitoring

High side voltage current, low side voltage current, transformer temperature, transformer gear, main transformer load cos φ;

2.3.3 Microcomputer Protection

Incoming line common measurement and control, main transformer protection, bus tie protection, PT parallel connection, capacitor protection, fault recording, remote control tripping;

2.3.4 Power Quality Monitoring

Voltage deviation, voltage imbalance, voltage fluctuation and flicker, voltage transients, voltage transients, daily statistics, power quality assessment;

2.3.5 Microcomputer Five Prevention

Prevent accidental opening and closing of circuit breakers, prevent opening and closing of isolating switches with loads, prevent closing of grounding switches with live wires, prevent closing of circuit breakers with grounding switches, and prevent accidental entry into live compartments;

2.3.6 DC screen monitoring

Control the mother voltage and current, battery voltage, current, temperature, overvoltage and undervoltage status of the mother battery, battery charging and discharging status, and input status of the AC input line;

2.3.7 Power Dispatch

Balanced equation 101, non-equilibrium equation 101, IEC60870-5-104，IEC61850；

2.3.8 Qualification Certificates

2.3.9 Site Map

3、 Advantages of the plan

Comprehensive monitoring: This solution can achieve comprehensive monitoring and management of various equipment in the substation, improving the reliability and safety of the power supply system.

Intelligent management: Through an intelligent management system, users can easily query and analyze data, improving management efficiency.

Scalability: This solution has good scalability and can be customized and expanded according to user needs.

Usability: The system interface is user-friendly, easy to operate, and users can quickly get started and proficiently use it.

In summary, the Ankerui user substation substation monitoring solution is a comprehensive, reliable, and secure system that can meet users' needs for substation monitoring and management.