Blog Details

Grid Code Compliance Study in Pakistan (NEPRA 2023)

A single failed low-voltage ride-through test can push back by months the date when a solar plant can connect to the power grid. This happens more often than most producers think in Pakistan's power sector. Since the NEPRA Grid Code 2023 was put into effect by the National Electric Power Regulatory Authority, any generator, transmission asset, or renewable energy project that wants to connect to the national grid must first pass a formal grid code compliance study. Only then will NTDC accept the connection. This book talks about what a grid code compliance study is, the rules and software engineers use to do them, and the useful skills you need to make a living doing them.

What Is a Grid Code Compliance Study?

A grid code compliance study is the technical check that shows a power plant, substation, or transmission asset follows the rules set by the grid operator. Only then can it connect to the network. These rules are part of the NEPRA Grid Code 2023 in Pakistan. The National Transmission and Dispatch Company (NTDC), which is the country's System Operator, is in charge of these rules.

The study compares a project to set limits for voltage, frequency, reactive power, fault behavior, and how well the protections work together. For a solar or wind plant, that means showing that the transformers and controllers work right when the grid goes down as well as when everything is working normally. For a regular generator or a new transmission line, this means proving that the equipment won't make the whole network less stable.

Without a passed grid code compliance study, NTDC will not issue an interconnection agreement, and DISCOs and IPPs across Pakistan increasingly expect engineers to hold this exact skill set. Anyone pursuing a career in power and energy training in Pakistan now needs to understand this process, because it directly affects how quickly a project reaches commercial operation.

Why Grid Code Compliance Studies Matter in Pakistan's Growing Power Sector

The power industry in Pakistan is growing quickly, which is why the need for grid code compliance studies keeps going up. A report from the Pakistan Economic Survey 2025–26 says that by March 2026, installed generation capacity had grown to 49,651 MW, up 8.5% from 45,782 MW the previous year. Hydropower, nuclear power, and renewable energy sources made up just over half of that added capacity for the first time.

The government has also promised 10,000 MW of new solar power and 30% green energy in the country's energy mix by 2030. Before NTDC accepts a connection, each of those new solar, wind, and hydropower projects has to go through a grid code compliance study. The Competitive Trading Bilateral Contract Market (CTBCM) structure has made the review process more technical, not less.

The need for engineers who can do these studies is growing faster in Pakistan than the supply of trained professionals. This is because there are more green energy projects, stricter rules, and a System Operator that wants verified simulation models.

Core Components of a Grid Code Compliance Study          

A full grid code compliance study is not a single test; it is a group of separate technical checks, each focusing on a different part of NEPRA's rules.

Steady-State Studies

Steady-state work covers load flow analysis, N-1 contingency checks, voltage limit verification, and reactive power (P-Q curve) capability. These studies confirm the plant behaves correctly under normal, everyday grid conditions and form the baseline every NEPRA submission builds on.

Dynamic and Fault Ride-Through Studies

Dynamic studies try to guess what will happen to a plant when there is a real disturbance, like a voltage drop, a frequency swing, or a fault close by. Here are the results of the Low Voltage Ride-Through (LVRT) and High Voltage Ride-Through (HVRT) tests, as well as the transient stability and critical clearing time calculations. These are used by NTDC to decide if a generator can safely stay linked to the grid during events.

Short Circuit, Protection, and Power Quality

This part covers three-phase and single-line-to-ground fault calculations, breaker rating verification, protection coordination, and harmonic (THD) analysis. Skipping this stage is a common reason compliance reports get sent back for revision.

Software Tools Used for Grid Code Compliance Studies in Pakistan

Engineers can technically do these kinds of studies on a number of different platforms, but in Pakistan, DIgSILENT PowerFactory is the most popular tool. PSS/E, ETAP, and PSCAD are all used in some utility offices and in schools, but PowerFactory is now the standard for NEPRA Grid Code 2023 submissions.

It has to do with news. You don't need any extra platforms to run load flow, N-1 contingency, short circuit, RMS dynamic modeling, LVRT/HVRT testing, transient stability, or harmonic analysis with just one PowerFactory model. More and more, NTDC's System Operator team and big utility companies want compliance reports that are made from verified PowerFactory models. This makes it harder for engineers who haven't worked with PowerFactory before to get grid-connected project jobs.

This is also where formal DIgSILENT PowerFactory training pays off fastest. Reading about load flow analysis in a textbook is different from building a single-line diagram, modelling a solar inverter's fault response, and generating a report NTDC will actually accept skills covered in hands-on industrial automation training programs in Lahore.

Step-by-Step: How a Grid Code Compliance Study Is Conducted

While every project differs, a grid code compliance study in Pakistan generally follows the same sequence:

1.      Data collection gathering equipment datasheets, single-line diagrams, and interconnection point details.

2.      Network modelling building the plant and surrounding grid in PowerFactory, including transformers, cables, and generator or inverter controllers.

3.      Steady-state analysis running load flow, N-1 contingency, and reactive power capability checks.

4.      Short circuit and protection studies calculating fault levels and verifying breaker and relay settings.

5.      Dynamic simulation testing LVRT/HVRT response, transient stability, and critical clearing times.

6.      Power quality checks verifying harmonic distortion and voltage unbalance stay within NEPRA limits.

7.      Compliance reporting compiling plots, tables, and verification results into a report formatted for NTDC and NEPRA submission.

Each step depends on the one before it, so a mistake in the network model early on shows up as a failed test much later which is exactly why hands-on practice matters more than theory alone.

Comparison: Learning Paths to Build Grid Code Compliance Study Skills

Engineers in Pakistan generally take one of three routes to learn how to conduct compliance studies, and they are not equally effective.

For engineers who need job-ready skills quickly, structured training with real software access and Pakistan-specific curriculum closes the gap that self-study and general coursework leave open.

Common Challenges Engineers Face When Learning Compliance Studies

Not lack of desire, but lack of access is the biggest problem. PowerFactory licenses are pricey, and most engineers can't work on a real compliance study until they have a job that needs one.

Another issue is foreign training that is too general. The software is taught in courses that are based on European or American grid codes, but they don't cover the specific NEPRA Grid Code 2023 limits, CTBCM context, and NTDC reporting format that a Pakistani submission needs.

A lot of engineers learn the tools but never build a full model of a solar or wind plant from start to finish. This is exactly what utilities and IPPs look for in job applicants. Engineers with more experience in industrial automation, like those who have taken a PLC SCADA HMI course, usually learn PowerFactory's modeling logic more quickly. This is because both industrial automation and modeling need to know how controllers, signals, and protection systems work together.

How IPEI Prepares You to Conduct Grid Code Compliance Studies

The Lahore-based IPEI Training Institute's grid code compliance study program is based on the NEPRA Grid Code 2023 and not a general foreign curriculum. DIgSILENT PowerFactory is used in every module, and instead of working through pre-built demo files, students build real solar PV and wind plant models.

The full grid code compliance study course syllabus and batch schedule covers everything from steady-state analysis through compliance reporting, taught by trainers with direct experience in Pakistan's power sector. IPEI also runs industrial automation training, including PLC, SCADA, and HMI courses, and IT courses in Lahore, for professionals who want to pair compliance study skills with a broader technical skill set.

You can read more about IPEI's hands-on, industry-focused approach on the About Us page, or reach out through Contact IPEI to confirm upcoming batch dates in Lahore.

Conclusion

Both Pakistan's power industry and NEPRA's work to enforce the Grid Code 2023 are moving at a steady pace. Before a new solar farm, wind project, or transmission upgrade can connect to the national grid, it must first go through a proper grid code compliance study. Utilities and IPPs are actively hiring engineers who can actually do that study, not just talk about it.

If you want to build that exact skill set on real DIgSILENT PowerFactory models, with a curriculum mapped to NEPRA's current requirements, browse IPEI's blog for more power sector guides or enroll directly in IPEI's grid code compliance training in Lahore.