Service for analyzing the selectivity of protective devices. It contains a large database of digital devices and allows generating professional reports for design documentation

Features:

• Quick drawing of the electrical network diagram using pre-made blocks (lines, buses, transformers, etc.)

• Selection of protective devices from the database (protection relays, circuit breakers, fuses, relays)

• Setting device trip parameters in a format fully compliant with the manufacturer's catalogs

• Parameter input validation through the intelligent Gridis system

• Automatic generation of a selectivity map for subsequent analysis

• Generation of a professional report for the project (selectivity map + network diagram)

• User registration in the system, project saving, technical support

• Short-circuit current calculation at all network levels (in development)

• Automatic selection of protective device trip parameters (in development)

• Ready-to-use parameter calculation in Word/PDF format (in development)

Currently, the active user base of the service exceeds 200 people

The service is an extension of the desktop program Gridis-KS, which has been available since 2017, with 520 clients.

Creation of digital twins of protective devices for use in third-party and proprietary services

A full cycle of work, from the analysis of technical documents to delivering ready-made databases to the client in JSON, CSV, or TXT formats, including database structure development and testing

Work has been carried out to create databases for devices from Hyundai Electric, CHINT, DEKraft, Systeme Electric, and many others

A service for converting graph images from PDF catalogs into digital form for further use in third-party programs and services (e.g., MS Excel).

Currently, the service has over 1,400 users

A calculation suite for determining short-circuit currents through power transformers for the purposes of relay protection.

It allows obtaining fault currents, visible to protective relay devices, during short circuits on the secondary side, taking into account the transformer winding connection group. These currents are critical parameters for calculating the sensitivity of relay protection.

Interactive online models for training personnel in electrical networks and substations

These models allow dynamic demonstrations of electrical experiments, providing a clearer understanding than static images and graphs found in books and other educational materials. The analysis of network modes is conducted based on real-time changing vector diagrams of currents and voltages.

The models are also used to analyze real emergency situations, as reported by the users themselves.

Since 2024, these models have been used for training students in the Department of Power Supply of Industrial Enterprises and Electrical Technologies (EPPE) at Moscow Power Engineering Institute (MPEI).

Developed models include:

• Symmetrical component method
• Transformation of short-circuit currents through a 10/0.4 kV transformer
• Operating principle of directional overcurrent protection (RNM relays)
• Asynchronous operation in the power system
• Fault process simulator (short circuits and phase interruptions)
• "Vector — Sinusoid" correspondence
• Sinusoidal waveform distortion with higher harmonics
• 110/10 kV network model
• Current transformer saturation model (GOST 58669-2019)
• Rotating magnetic field model (electric motor)
• 10/0.4 kV network model