The high and low voltage distribution simulation system is a simulation system that uses high and low voltage distribution equipment, simulation methods, and microcomputer control software to simulate the actual operating status of customer high and low voltage distribution equipment. The system organically combines theoretical knowledge with practice, realizing the training of various power marketing, operation, and inspection personnel in practical operation skills, customer on-site, and emergency power operation accident handling capabilities, and achieving the goal of improving the comprehensive business skills of power marketing personnel.

Through this system, practical training and professional exams can be completed for on-site operations related to marketing business, including electricity inspection, energy metering, on-site electricity management, business expansion reporting and installation, business receipt, relay protection, DC equipment maintenance, substation commissioning and maintenance, contract management, switching operation and two ticket management, abnormal and accident handling of substation operation equipment, etc.

System features:

▲ Real: The real high and low voltage equipment is completely used. The operation of the high and low voltage equipment, the status of each indicator light, the display value of the instrument, the parameter setting and action of the protection equipment are exactly the same as the real high and low voltage distribution room. The various sound, light and electrical effects when the fault occurs are the same as the actual scene, so that the students have a feeling of immersive.

▲ Safety: A safety design scheme combining power components to simulate high-voltage power supply and various protective measures is adopted to ensure high safety performance of this system and prevent students from accidentally getting electric shock and causing personal injury.

▲ Efficiency: Because it is difficult for students to frequently encounter faults in real operating systems, their emergency response abilities will only gradually improve after working for many years. This system should be able to simulate the occurrence and phenomena of these faults at any time, improve the efficiency of practical operation skills training for students, and enhance their emergency response capabilities in various fault states.

▲ Intelligence: Adopting a computer monitoring system, various fault phenomena are automatically simulated and simulated through computer operation. The exam function has the ability to automatically determine students' scores and track their scores.

software system

The distribution room simulation software system utilizes computer software and network technology to simulate the state of real equipment in substations through rigorous mathematical model calculations. The system is developed based on the Windows operating system, with Delphi 2007 as the development tool. The database uses MS SQL SERVER 2000 and is connected through ADO technology. The network communication part uses WinSock technology. A software system is an efficient and practical backend monitoring system that utilizes advanced computer technology, modeling technology, network communication technology, multimedia technology, and other high-tech means,

The system is equipped with a coach machine and a student machine, which are connected through a network and have characteristics such as real-time, stability, and scalability. The instructor machine can set separate faults for a single student machine and set the same fault for all student machines. Students can operate independently on their respective student machines without affecting each other. At the same time, through the communication server, the system can also communicate with external systems to complete functions such as data exchange.

▲ Student machine functions

Capable of displaying operational status; Capable of operating primary and secondary devices; Capable of adjusting operational parameters; Equipped with device parameter retrieval function; Capable of on-site operation; It has a soft dial function.

▲ Coach machine function

Capable of selecting and saving operating conditions; Capable of modifying parameters; It has the function of setting abnormal operation, faults, and composite faults. Including the following aspects:

▲Remote monitoring of students' operations is possible.

▲Can perform troubleshooting operations on the student machine.

▲Can backup and restore databases.

▲It is possible to manage the addition and deletion of student information.

hardware system

The distribution simulation system mainly simulates the high and low voltage distribution rooms of 10KV/0.4KV dual power supply distribution, with a total of 19 panels and cabinets. The high-voltage equipment includes 2 high-voltage incoming cabinets, 2 high-voltage metering cabinets, 1 high-voltage PT cabinet, 2 high-voltage outgoing cabinets, 1 high-voltage interconnection cabinet, 1 high-voltage busbar isolation cabinet, 2 transformer cabinets, and 1 protection cabinet; The low-voltage equipment includes 2 low-voltage incoming cabinets, 1 capacitor compensation cabinet, 2 low-voltage outgoing cabinets, 1 low-voltage interconnection cabinet, 1 low-voltage metering cabinet, 2 transformers with 800KVA and 10/0.4KV, 1 DC cabinet, 1 power source control cabinet, and a set of computer control system and software. Each cabinet is equipped with a fault simulator, which mainly monitors the voltage, current, power, and circuit breaker operation status of the circuit, and real-time collects the status of each switch in each cabinet; Set cabinet malfunctions, etc.

The programmable analog load source mainly provides signal power to the switchgear. The program-controlled simulated load source in the incoming cabinet mainly provides the necessary signals for protection actions to the comprehensive protection and measurement device. The program-controlled simulated load source in the metering cabinet mainly provides voltage, current, and phase values to the measuring instrument. The program-controlled simulated load source in the outgoing cabinet mainly simulates the load. The program-controlled simulated load source can output voltage and current signals of different amplitudes and phase angles in three phases, fully simulating the actual load.

Hardware system parameters

▲ Program controlled analog load source: outputs single-phase or three-phase power frequency sine voltage, current, and phase.

▲ Programmable or manual keyboard operation, realizing three-phase three wire/four wire, active/reactive, voltage, current output range, ▲ phase experimental point selection.

▲ Output voltage: 100V, 220V 380V, each range 0-120% continuously adjustable, adjusting fineness: 0.01%

▲ Output current: 1A, 2.5A, 5A, 10A, 25A, 50A, 100A. Each range is 0-120% continuously adjustable with a fineness of 0.01%, and has a current output function of 0-199.9mA.

▲ Output voltage and current stability<0.05% (PF=1.3 min)

▲ Output frequency: 45.0 Hz to 65.0 Hz, adjust fineness: 0.1Hz

▲ Output phase: 0 °~359 °, adjustment fineness: 1 °