• ETEEP_Function Summary

Function Summary of Grounding Technology and Electromagnetic Environment in Electric Power (ETEEP)

Overview

Developed by Wuhan Tianyi Electronics Co., Ltd., the ETEEP software is a professional commercial design and calculation tool primarily focused on high-voltage DC grounding electrodes and grounding grids of substations/converter stations. It also includes lightning protection parameter calculations in compliance with IEC and GB standards. With years of practical application in both domestic and international projects, ETEEP is particularly well-suited for power system transmission and transformation engineering researchers and designers due to its simple data input, rich graphical and textual output, and user-friendly interface.

1. Main Interface

ETEEP's interface is designed to align with standard commercial software for ease of learning, see Fig. It includes common functions like file management (open, copy, save, browse, print), and supports both text and graphic output with editing capabilities. The main screen resembles that of Microsoft Word, including menu bars, toolbars, status bars, file tree view, and display areas. Help files and real-time control guidance are also included, making it easy for users familiar with Windows to master the software.

Fig. ETEEP's Splash screens

2. Key Features

- Model Creation: Supports data interpretation from Wenner method measurements or simulated potential curves to create stratified soil models automatically or manually.

- Electric Field Calculation: Uses wave propagation methods to compute grounding resistance, leakage density, surface electric field, and step potential in multi-layer models.

- Thermal Calculations: Computes both steady-state and transient temperature rises of grounding electrodes using finite difference methods.

- Electrode Selection & Optimization: Simulates various types of electrodes and optimizes design for length, coke filling, and feeder rod sizing.

- Current Distribution: Calculates DC current distribution in diversion systems, aiding in cable sizing.

- System Impact Analysis: Evaluates DC ground current impact on surrounding AC grids.

- Metal Corrosion Analysis: Simulates corrosion effects of DC ground current on underground pipelines and cables.

- Insulation Coordination: Calculates insulation requirements and arc voltage during tower flashover.

- Short-Circuit Current to Ground: Provides both manual and simulation-based methods for calculating grounding currents during faults.

- Grounding Grid Design: Offers parametric layout modeling, performance parameter calculations, and graphical results.

- Lightning Protection Design: Rapid 3D calculation and visualization of lightning protection ranges using rolling sphere and broken line methods.

- Construction Drawings: Auto-generates detailed construction drawings and material lists in DWG format.

- User-Friendly Interface: Supports DWG import, parameter input, and drag-and-drop modeling. Built-in help, error detection, and input validation.

- Rich Output Formats: Supports Word, Excel, text, image (curves/cloud maps), and DWG drawing formats for comprehensive reporting.

3. Mathematical Models

- Electrical Parameters: Combines analytical and numerical methods for accurate computation of potential rise, resistance, and current distribution. Includes soil refraction/reflection and advanced discretization for irregular geometries.

- Current Distribution: Node voltage method ensures even distribution in any layout or configuration.

- Thermal Modeling: Based on field theory and thermal equilibrium, using Poisson's equation and finite difference for arbitrary shapes.

- Optimization: Assesses thermal stability using equivalent resistivity and adjusts electrode design accordingly.

- Impact Evaluation: Network-based modeling estimates transformer winding DC current and its mitigation.

- Corrosion Analysis: Conforms to GB/T 50991-2014 standards for underground metallic objects.

- Short-Circuit Analysis: Offers manual and network-based methods for grounding current calculation.

4. System Requirements

ETEEP does not require installation—simply copy the executable files to any directory. Compatible with Windows 7 through Windows 11

5. Error Detection

ETEEP includes robust error-checking tools: real-time input validation, data consistency checks during file saving, and run-time error monitoring. Detailed messages and corrective suggestions are provided when issues occur.

Contact Information

For more information, please contact Wuhan Tianyi Electronics Co., Ltd.