PROJECT
Industry: oil-and-gasProject overview
Challenge
Ensure stable and reliable operation of the power system under multiple operating modes:
- island operation with on-site generation
- grid-connected operation in parallel with the external power system
A critical requirement was uninterrupted operation of process units under all disturbance conditions.
Project Features
- presence of distributed generation
- multiple normal operating configurations
- operation in both island and grid-connected modes
- a large number of motors with different starting characteristics
Such a configuration significantly increases the complexity of ensuring system stability and proper operation of protection and control systems.
Risks
Operating under multiple power supply modes introduced the following risks:
- loss of stability during transitions between operating modes
- incorrect operation of protection systems and automatic transfer schemes
- disturbances during motor starting and reacceleration
- cascading failure scenarios under fault conditions
Approach
A detailed digital model of the power system was developed to analyze and improve system stability.
The following studies and activities were performed:
- collection and validation of input data, including site surveys
- development of a comprehensive power system model
- load flow analysis
- short circuit analysis with equipment duty verification
- protection coordination and automatic transfer scheme analysis
- transient stability analysis
- motor reacceleration studies
System Analysis
The most challenging operating scenarios were evaluated, including:
- transitions between island and grid-connected modes
- disturbances in the external power system
- outages of on-site generation units
- severe motor starting and reacceleration conditions
Special attention was given to system behavior under combined disturbances.
The calculated parameters were verified against applicable standards, including:
- Russian Ministry of Energy Order No. 630 (2018) – power system stability guidelines
- Russian Ministry of Energy Order No. 380 (2015) – active/reactive power ratio requirements
- GOST 32144-2013 – power quality standards
Results
As a result of the project:
- a validated digital model of the power system was developed
- critical operating conditions and transient processes were identified
- operating limits of the system were determined
- stability improvement measures were developed
- correct operation of protection and control systems was ensured
- risks of process shutdowns were significantly reduced
All solutions were validated through calculations and comply with applicable regulatory requirements.