# WIA-ENE-006 PHASE 1: Foundation

**Version:** 1.0.0
**Status:** Active
**Last Updated:** 2025-12-25

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## 1. Overview

Phase 1 establishes the foundational requirements for wind energy systems compliant with WIA-ENE-006. This phase focuses on core technical specifications, site assessment, and basic operational requirements that form the basis for all subsequent phases.

### 1.1 Objectives

- Define minimum technical requirements for wind turbine systems
- Establish site assessment and resource evaluation methodologies
- Specify basic safety and environmental protection measures
- Set baseline performance and reliability standards

### 1.2 Scope

Phase 1 applies to:
- New wind energy installations (onshore and offshore)
- Retrofit and upgrade projects
- Small-scale (< 100 kW) to utility-scale (> 100 MW) systems
- All turbine types (HAWT, VAWT, floating, etc.)

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## 2. Technical Specifications

### 2.1 Turbine Design Requirements

**Minimum Design Life:** 20 years
**Design Standards:** IEC 61400-1, IEC 61400-2 (small wind), IEC 61400-3 (offshore)

#### 2.1.1 Rotor System
- Blade material: Composite (fiberglass, carbon fiber) or approved equivalent
- Design load cases: Per IEC 61400-1 (DLC 1.1 through 6.4)
- Lightning protection: IEC 61400-24 compliant
- Erosion protection: Leading edge protection required

#### 2.1.2 Drivetrain
- Gearbox (if applicable): AGMA 6006 or ISO 6336 compliant
- Main bearing: L10 life ≥ 130,000 hours
- Generator: IP54 minimum protection, Class F insulation
- Couplings: Fail-safe design with condition monitoring

#### 2.1.3 Tower and Foundation
- Tower: Steel tubular or lattice, per IEC 61400-6
- Foundation: Site-specific design, minimum safety factor 1.5
- Corrosion protection: C5 rating (ISO 12944) for offshore
- Seismic design: Per local building codes

#### 2.1.4 Control System
- Programmable Logic Controller (PLC) with redundant safety systems
- Independent pitch control (individual or collective)
- Active yaw system with untwist function
- Emergency stop: Redundant systems, response time < 5 seconds

### 2.2 Performance Requirements

#### 2.2.1 Power Output
- Rated power tolerance: +/- 10% at rated wind speed
- Power curve accuracy: Per IEC 61400-12-1
- Cut-in wind speed: ≤ 4 m/s (typical)
- Rated wind speed: 10-14 m/s (typical)
- Cut-out wind speed: ≥ 20 m/s

#### 2.2.2 Efficiency
- Overall system efficiency: ≥ 85% at rated conditions
- Power coefficient (Cp): ≥ 0.45 (Betz limit: 0.593)
- Generator efficiency: ≥ 95% at rated power

#### 2.2.3 Availability
- Target availability: ≥ 95% annually
- Mean time between failures (MTBF): ≥ 5,000 hours
- Mean time to repair (MTTR): ≤ 24 hours for minor faults

### 2.3 Safety Systems

#### 2.3.1 Primary Safety Functions
1. Overspeed protection (rotor and generator)
2. Vibration monitoring and shutdown
3. Temperature monitoring (gearbox, generator, bearings)
4. Pitch system redundancy
5. Mechanical brake (fail-safe design)
6. Lightning protection system
7. Fire detection and suppression

#### 2.3.2 Environmental Limits
- Operating temperature range: -20°C to +45°C (standard)
- Survival temperature range: -30°C to +50°C
- Maximum wind speed (survival): 52.5 m/s (Class III, 50-year return)
- Ice detection and protection (if required)

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## 3. Site Assessment

### 3.1 Wind Resource Evaluation

#### 3.1.1 Measurement Requirements
- Minimum measurement period: 12 months (24 months preferred)
- Measurement height: Hub height +/- 10m
- Data recovery rate: ≥ 90%
- Instruments: Cup anemometer (IEC 61400-12-1 compliant)

#### 3.1.2 Analysis Requirements
- Mean wind speed calculation
- Weibull distribution fitting
- Wind shear analysis (power law exponent)
- Turbulence intensity assessment
- Extreme wind analysis (50-year return period)
- Wind rose and directional analysis

### 3.2 Site Conditions Assessment

#### 3.2.1 Topography and Land Use
- Site boundary mapping
- Terrain complexity assessment
- Land use restrictions and setbacks
- Access road feasibility
- Crane pad locations

#### 3.2.2 Geotechnical Investigation
- Soil borings to depth of 1.5x foundation diameter
- Soil bearing capacity determination
- Groundwater level assessment
- Seismic hazard evaluation
- Foundation recommendations

### 3.3 Grid Connection Study

#### 3.3.1 Electrical Infrastructure
- Available grid capacity
- Distance to interconnection point
- Voltage level and transformer requirements
- Power quality baseline assessment
- Grid code requirements identification

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## 4. Environmental and Social

### 4.1 Environmental Impact Assessment

#### 4.1.1 Required Studies
- Avian and bat impact assessment
- Habitat and ecosystem evaluation
- Noise impact modeling
- Shadow flicker analysis
- Visual impact assessment
- Archaeological and cultural heritage survey

#### 4.1.2 Mitigation Measures
- Turbine micrositing to minimize impact
- Seasonal curtailment protocols (if needed)
- Habitat restoration plans
- Noise mitigation strategies
- Visual screening (if required)

### 4.2 Community Engagement

#### 4.2.1 Stakeholder Identification
- Local residents and landowners
- Municipal and regional authorities
- Environmental organizations
- Indigenous communities (if applicable)
- Other land users (farmers, hunters, etc.)

#### 4.2.2 Engagement Activities
- Public information meetings
- Project website and information materials
- Feedback mechanism (phone, email, online)
- Community benefit discussions
- Ongoing liaison during construction and operation

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## 5. Quality Assurance

### 5.1 Design Review

#### 5.1.1 Required Documentation
- Design basis memorandum
- Calculations and analyses
- Technical drawings
- Equipment specifications
- Safety system descriptions

#### 5.1.2 Review Process
- Independent design verification
- Peer review by qualified engineers
- Regulatory review and approval
- Revision control and documentation

### 5.2 Component Certification

#### 5.2.1 Turbine Certification
- Type certification per IEC 61400-22
- Component certificates (blades, generator, etc.)
- Quality management system (ISO 9001)
- Environmental management system (ISO 14001)

### 5.3 Testing and Validation

#### 5.3.1 Factory Acceptance Testing
- Component testing before shipment
- Electrical systems testing
- Control system validation
- Documentation review

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## 6. Compliance Matrix

| Requirement | Specification | Verification Method | Responsibility |
|-------------|---------------|---------------------|----------------|
| Design life | 20 years minimum | Fatigue analysis | Manufacturer |
| Power curve | IEC 61400-12-1 | Field measurement | Developer |
| Availability | ≥ 95% | Operational data | Operator |
| Safety systems | Redundant | Testing | Manufacturer |
| Grid compliance | Local grid code | Grid studies | Developer |
| Environmental | EIA approval | Agency review | Developer |

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## 7. Philosophy Integration

**弘益人間 (홍익인간) - Benefit All Humanity**

Phase 1 embodies this principle through:
- Rigorous safety standards protecting workers and communities
- Environmental assessments that prioritize ecological protection
- Community engagement ensuring local voices are heard
- Open standards enabling global knowledge sharing
- Quality requirements ensuring reliable, long-term operation

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## 8. Phase 1 Deliverables

Upon completion of Phase 1, the following deliverables shall be produced:

1. **Technical Documentation**
   - Final turbine specifications
   - Foundation design calculations
   - Electrical single-line diagrams

2. **Site Assessment Report**
   - Wind resource analysis
   - Geotechnical report
   - Environmental impact assessment

3. **Regulatory Approvals**
   - Building permits
   - Environmental permits
   - Grid interconnection agreement (preliminary)

4. **Quality Assurance Records**
   - Design review reports
   - Turbine type certificate
   - Material certifications

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**Document Control:**
- Document ID: WIA-ENE-006-PHASE1-v1.0
- Approved by: WIA Standards Committee
- Next Review: 2027-12-25

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弘益人間 (홍익인간) · Benefit All Humanity