Understanding the network operating condition in different scenarios is crucial to maintain the network within the boundaries of equipment limits and stable power system.​

Thermal and voltage limits of the network must be assessed for power networks.

We can support you with detailed power system network modelling and assessment​

• Documentation review and site visit to collect accurate information of the power system​.

• Developing a detailed model in power system study software​.

• Consultation with Client on expected normal operating scenarios and credible contingencies​.

• Performing load flow analysis for operating conditions to assess thermal overload of any network element and voltage levels within the network.​

• Provide mitigation advise for any adverse observations.

Quality of power is important for functioning of various electronic equipment as well as life of power equipment.​

Various grid code require the operators to maintain the power quality within acceptable limits.

Building on from the power flow model, we can incorporate the modeling aspects required for power quality studies​

• Including the harmonic source from different equipment like inverter-based generators, VSDs, loads etc., into the model​.

• Representing the external grid with harmonic network impedance for different operating scenarios in consultation with network service providers​.

• Perform power quality assessment for harmonics, voltage unbalance and flickers​.

• Provide technical advice on mitigation through filter, power factor correction, STATCOM, etc.

Protection coordination is of utmost importance to ensure safety of equipment and personnel along with highest reliability of the network.​

Protection coordination studies are extremely important to ensure sensitivity and selectivity of the protection system.

We can support you with detailed protection coordination studies​

• Developing a detailed model of the network in power system study software, along with representing the relays​.

• Consultation with Client on expected normal operating scenarios and credible contingencies​.

• Coordination with network service provider for the maximum and minimum expected fault levels and grid impedance​.

• Perform relay coordination studies and protection relay settings to ensure selectivity and sensitivity of the protection system installed.​

• If required, we can assist with on site relay testing and commissioning.

Arc flash assessment guides the Client for the expected arc flash energy in the network and hence support developing safety guidelines.​

Some of the grid codes require periodic arc flash assessment as per the latest guidelines like IEEE 1584 and NFPA 70E.

Using the models developed for load flow studies and protection coordination studies, arc flash assessment is the next step of assessment

• Site visit to confirm the accuracy of the models and the relay settings to be considered.​

• Consultation with the Client for the network operating scenarios.​

• Perform arc flash assessment for all network operating scenarios for the maximum and minimum fault levels.​

• Provide risk mitigation advice for the network locations with high arc energy.​

• Support the Client in implementation of safety guidelines.

Unprecedented growth in large scale renewable generation and change in distribution system with significant uptake of distributed energy resource has resulted in a complex network planning requirements.​

Network planning is critical to support the energy transition.

Network planning needs assessment of power system for future​

• Study of the expected generation growth and required transmission infrastructure to support.​

• Study of expected load and DER growth in the distribution network to understand the required network upgrades​.

• Developing future networks based on planners' inputs and assessing the network for various contingencies.​

• Network planning needs steady state assessment as well as dynamic assessment to ensure secure network operating conditions.​

• Advice on optimal location and size for reactive power compensation device like capacitor banks, STATCOMs etc.​

• Advice on need of synchronous condensers / inertia support.

Network operators, generators, distributors, and industrial installation often need support in investigation of power system performance for any system event.​

In some cases, projects need technical support in coordinating with the suppliers and OEMs.

Understanding the power system performance is important to ensure the system works as expected​

• Support Clients in fault response investigation to ensure correct operation of protection relays.​

• Support in understanding the controller response for the system events to ensure stable operation and validation of controller models.​

• Provide advice on corrective actions for any maloperation of the relays or controllers.​

• Supporting Clients in review of protection scheme drawings, relay settings, Factory Acceptance Testing, Site Acceptance testing.

RMS studies are common to understand the power system response in time domain simulation for a disturbance.​

Several grid code required RMS studies to be performed for renewable generators prior to connection to understand the stable operation and integration of the generator.

We understand the requirement of the grid code and required studies to demonstrate the generator performance​

• Developing the generator models using the user defined OEM models or generic models as required by the grid operators.​

• Tune the generator model for the required controls and fault ride through and dynamic support requirements of the grid code.​

• Integrate the generator model with the wider network model if available and identify any network interactions and performance issues along with mitigation solutions.​

• Assess the model performance for various clause as per the grid code and provide a generator performance report.

Some of the power system aspects require a detailed assessment which can not be detected through RMS studies.

Events like transformer energization, switching studies for various equipment, performance of inverter-based generators using phase lock loop during faults etc., need detailed analysis using EMT studies.

Some of the network interference and instabilities which are not detected through RMS studies can be observed using EMT studies

• Understanding the aspects requiring EMT studies and developing the model in EMT software to perform the studies.​

• Use generic or user defined models to represent the generator controls and perform the grid connection studies as required by several grid codes.​

• Performing switching studies, transformer energization studies etc., to assess the impact on switchgear and network.

Most of the grid codes require the generators to periodically assess the compliance against the performance requirement.​

This is to ensure that the control system is working as expected throughout the life of the generator.

We can support the testing of control system for various generators with offline and online testing​

• Governor testing for active power and frequency control for traditional synchronous machines.​

• AVR testing for active power and frequency control for traditional synchronous machines.​

• Testing of power plant controller for large scale inverter based solar farm, batteries and wind farms to control plant level controls.​

• Testing of solar inverters, battery inverters and wind farm units at the machine level to validate local controls.​

• Provide reports for the plant performance for various testing.

With the transition of power system network, the dependency on the power system model is significant for future planning and ensuring the power system is secure and reliable.​

Most of the grid operators required the generator control models to be validated.

After the testing of the generators (synchronous or inverter based), we can help our clients with the following​

• Develop the power system model to represent the generating system using the generic models or OEM models as required by the grid operators.​

• Parameter mapping of the on-site controllers with the models​.

• Simulating the tests performed on site and compare the simulation results as per good engineering practice and grid code requirements.​

• Model validation is done for RMS and EMT models.​

• Provide reports for the plant performance for various testing confirming the accuracy of the models to represent the power system.