In India, grid code compliance ensures that power generating units and plants operate in harmony with the national grid, maintaining stability and reliability. The Central Electricity Authority (CEA) and the Central Electricity Regulatory Commission (CERC) have established specific standards and regulations that outline the necessary studies and requirements for grid code compliance. Key studies and assessments include:

1. Reactive Power Capability Study

   • Description: Evaluates the ability of a power generating unit to supply dynamically varying reactive power, maintaining a power factor within the limits of 0.95 lag to 0.95 lead at the Point of Interconnection (POI).
   • Clause: CEA Technical Standards for Connectivity to the Grid, Regulation 6.4.7(b) of IEGC.

2. Frequency Withstanding Capability Assessment
   

   • Description: Ensures that generating stations can remain connected and operate within a frequency range of 47.5 Hz to 52 Hz, delivering rated power between 49.5 Hz and 50.5 Hz, subject to primary energy source availability.
   • Clause: IEGC Clause 5.2(b), and CEA Connectivity Standards Section 7.3.

3. Active Power Set Point Control Test

   • Description: Assesses the unit’s response to different reference commands, evaluating static error, rise time, and settling time of active power under both steady-state and dynamic conditions.
   • Clause: CEA Standards Section 6.2.5.

4. Frequency Droop Control Test

   • Description: Verifies the unit’s ability to operate with a droop of 3% to 6% and a dead band not exceeding ±0.03 Hz, providing an immediate real power primary frequency response of at least 10% of maximum active power capacity for frequency deviations exceeding 0.3 Hz.
   • Clause: IEGC Clause 5.2(c).

5. Ramp Rate Control Assessment

   • Description: Evaluates the generating station’s capability to control the rate of change of power output, ensuring it does not exceed ±10% per minute.
   • Clause: CEA Standards Section 6.4.3, IEGC Clause 5.2(e).

6. Fault Ride-Through (FRT) Testing

   • Description: Assesses the unit’s ability to remain connected during voltage dips (Under-Voltage Ride-Through – UVRT) and swells (Over-Voltage Ride-Through – OVRT), ensuring reactive power support during faults and rapid active power recovery post-fault.
   • Clause: CEA Standards Section 6.4.5, IEGC Clause 5.2(m).

7. Short Circuit Ratio (SCR) Analysis

   • Description: Ensures that generating stations have an SCR of not less than 5 at the interconnection point, indicating robustness against grid disturbances.
   • Clause: CEA Standards Section 7.5.

8. Power Quality Assessment

   • Description: Measures harmonic current injections, DC current injection, and flicker to ensure they are within specified limits, maintaining the quality of power supplied to the grid.
   • Clause: IEEE 519-2014 and CEA Connectivity Standards Section 6.4.6.

Grid code compliance is critical for ensuring that power generating units operate seamlessly with the national grid, maintaining its stability and reliability. Each test, from reactive power assessment to fault ride-through analysis, plays a pivotal role in aligning your power plant with regulatory standards set by the Central Electricity Authority (CEA) and the Central Electricity Regulatory Commission (CERC). Non-compliance can lead to inefficiencies, penalties, and potential operational risks, making these studies indispensable.

Elegrow Technology specializes in providing end-to-end solutions for grid code compliance. With a team of experienced engineers and advanced tools, we deliver precise assessments, ensuring your power plant meets all regulatory standards and operates optimally within the grid. Partner with us for accurate testing, reliable analysis, and expert support tailored to your industry needs. Let Elegrow Technology simplify your path to compliance and help you achieve operational excellence.

Get in touch with us today to learn more about our grid code compliance services!