Fifty-plus plants filed through SAPPSE. Direct working relationships with CENACE technical reviewers across multiple Regional Control Offices (GCRs). Native Spanish authorship — the three-stage process from pre-test documentation through commercial operation entry, end-to-end.
Mexico's grid code — the Código de Red 2.0, published in the Federal Gazette (DOF) on 31 December 2021 under Resolution RES/550/2021 — is the technical framework any generator interconnected to the National Electric System (SEN) must comply with. CRE issued it under the authority of LIE Art. 12 section XXXVII. The code is organized into six regulatory manuals covering planning (P), operations (OP), generation interconnection (INTE), load-center connection (CONE), smart-grid telemetry & information security (REI), and electrically-isolated systems (SEA) — 309 numbered criteria across the six chapters.
The framework is jointly administered. CRE sets the regulation; CENACE operates the SEN, runs the Wholesale Electricity Market (MEM), and reviews every technical filing through its Regional Control Offices (GCRs). SENER sets federal energy policy.
The energy regulator. Issues the Código de Red and its amendments. Sets the rules generators, utilities and the wholesale market operate under.
The system operator. Receives, reviews and approves all Código de Red technical filings via the SAPPSE system. Manages real-time operation of the SEN and the wholesale electricity market.
The Mexican interconnected power system. Any generation unit connecting to the SEN — whether grid-tie, wholesale market participant or behind-the-fence with export — falls under Código de Red.
Every power plant connecting to the SEN follows the same three-stage CENACE process under Código de Red 2.0 — the framework established by CRE Resolution RES/550/2021. Each stage gates the next: documentation and modeling come before tests; tests come before commercial operation; the Commercial Operation Declaration is the final filing that triggers COD. The Oficio of requirements is issued by the relevant Regional Control Office (GCR) per project.
For new generation plants, the full 29-requirement Oficio applies — Stage 1 alone has 19 pre-test deliverables before any field testing begins. For existing plants integrating into the MEM, a shorter express-requirements pathway applies — methodology travels, scope adjusts. GCE has experience with both pathways.
Annex 4 (Interconnection Manual) + Annex 3 (Operational Coordination Manual)For new power plants connecting to the SEN. All three stages, all four test families per plant Type (A/B/C/D), end-to-end from SAPPSE registration to the Commercial Operation Declaration.
For existing plants integrating into the Wholesale Electricity Market (MEM). Lighter scope — methodology applies, deliverables sized to the asset's existing data, operating history and prior CENACE registrations.
Where the engagement touches CENACE's ICT Requirements Manual for the SEN and MEM — telemetry channels, RTU/UTR configuration, SCADA signal lists, AGC integration, simulated protocol testing, PMU and disturbance recorders — GCE coordinates and documents the testing. The hardware install, the commissioning of the telemetry equipment, the communication channels (fiber, microwave, satellite) and the SCADA backend integration at CENACE all stay with the integrator and the operator. The scope-line is clean from day one.
SAPPSE — the System for the Administration of the Equipment Commissioning Process — is the CENACE system every Mexican filing flows through, from initial scope confirmation through registration of the Physical Asset to final approval. Database administration in SAPPSE requires authorized personnel registered with the corresponding Regional Control Office (GCR), per CENACE's ICT Requirements Manual for the SEN and MEM.
Every engagement follows the same disciplined process. Each phase produces specific artifacts that gate the next. The dossier that ships is traceable line-by-line back to the test data and the engineering that produced it. Initial meetings with the GCR happen 60 working days before Physical Asset registration; the first hourly generation forecast lands 10 working days before first synchronization; field testing follows the approved test program coordinated with the GCR, Transmission and Distribution Operators.
Generation class. Document types required. CENACE technical contact. SAPPSE access setup. Compliance scope locked.
Test data, model packages, study reports gathered. Cross-checked against Código de Red requirements. Gap analysis closed.
Native Spanish drafting. Format adaptation to CENACE conventions. Annex assembly. Internal QA against past-approval baselines.
Portal upload with full document traceability. Receipt confirmation. Cross-document references intact.
CENACE query response within review windows. Technical clarifications in Spanish. Defense through final approval certificate.
The Mexican practice is the deepest filings track record GCE maintains. 50+ plants filed through SAPPSE across the major OEM platforms operating in the SEN — Mitsubishi, Siemens, Wärtsilä, GE, Alstom, Solar Turbines, Caterpillar, Jenbacher and others. Both pathways covered — full Oficio-driven new-plant interconnection campaigns and the lighter express-requirements pathway for existing plants joining the MEM. Each engagement builds the working relationship with CENACE reviewers across multiple regional GCRs.
A representative sample of named engagements below — combined-cycle, cogeneration, simple-cycle and reciprocating-engine plants under Código de Red.
The Código de Red 2.0 is organized into six regulatory manuals, each carrying its own chapter code and numbered criteria. The framework is supplemented by separate CENACE manuals — the Interconnection Manual, the Operational Coordination Manual, the Technical Requirements Manual, and the ICT Requirements Manual — together with the LIE (Electric Industry Law) statutory framework. International engineering standards (IEEE, IEC, ANSI) overlay the Mexican framework where the local code defers to international consensus.
Issued by CRE under LIE Art. 12, Section XXXVII, published in the Federal Gazette (DOF) on 31 December 2021. Six regulatory manuals totaling 309 numbered criteria. Supplemented by CENACE-issued operational manuals.
Chapter 1 · P SEN Planning (54 criteria)Chapter 2 · OP SEN Operations (123 criteria) — incl. Annex 3 Primary Equipment Capacity, Annex 4 Single-Line Diagrams & NomenclatureChapter 3 · INTE Power Plant Interconnection (20 criteria)Chapter 4 · CONE Load Center Connection (17 criteria)Chapter 5 · REI Telemetry, Interoperability & Information Security (23 criteria)Chapter 6 · SEA Electrically Isolated Systems (72 criteria)LIE Art. 33 · 107 · 108 Statutory framework for CENACE authorityOperational manuals issued by CENACE under the Código de Red. International engineering standards (IEEE, IEC, ANSI) referenced for test methodology, equipment models, protection coordination and dynamic model validation.
Interconnection Manual Power Plant Interconnection & Load Center Connection (incl. Annex 4)Operational Coordination Manual of the Código de Red (incl. Annex 3)Technical Requirements Manual Interconnection to the SENICT Requirements Manual for the SEN and MEM (by plant Type A/B/C/D)IEEE 421.5 · 1110 Excitation & synchronous machine modelsIEC 60034 · 60909 · 61400-27 Machines, fault currents, wind turbinesANSI/IEEE C37 Protection coordinationTell us about your facility, the document types you need filed, and your COD or approval deadline. We come back within two business days with scope, schedule and quote — in Spanish or English, whichever you prefer.