Implementation of SoP for FTC of BESS installed along with already commissioned/to be commissioned RE Projects under Rajasthan Integrated Clean Energy Policy 2024 under – EQ

Summary:

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## **Key Business Points**

### 1. **Mandatory Compliance for BESS Integration**
– All RE developers must **strictly adhere** to this SoP **before** FTC of BESS.
– Non-compliance may delay or deny grid connectivity.

### 2. **BESS Components Requiring Approval**
The SoP defines BESS as comprising:
– **Power Conversion System (PCS)** – bi-directional inverter
– **Energy Storage** (batteries)
– **Battery Management System (BMS)**
– Optional: isolation transformer, protection devices, cooling systems, high-level control system

### 3. **Pre-FTC Documentation & Data Submission**
Applicants must submit:

| Category | Details Required |
|———-|——————|
| **Battery** | Make, chemistry, design capacity (kWh), self-discharge rate, DoD, life cycle, round-trip efficiency, IEC test certificates |
| **Power Conditioning Unit** | Make, DC-DC converter type, inverter power rating & efficiency, min response time, IEC certificates |
| **Measurement & Control** | Sensors, sensitivity, accuracy, precision |

### 4. **Technical Parameters to be Telemetered to SLDC**
RE developers must enable remote monitoring of:
– Operating mode (grid/standalone, auto/manual, charge/discharge)
– Voltage, current, active/reactive power, frequency, energy export/import
– State of Charge (SoC) in MWh
– Max SoC, available capacity, charge/discharge ramp rates
– AGC availability and control mode
– Ambient temperature, breaker status, alarms

### 5. **Mandatory Tests & Certificates Before Trial Run**
| Test Type | Requirement |
|———–|————-|
| Sensor & metering verification | ✅ |
| Control functions (local/remote/auto) | ✅ |
| Performance criteria | ✅ |
| All intended applications | ✅ |
| Grid interface protection & control | ✅ |
| Power quality parameters | ✅ |

### 6. **PCS Operational Requirements**
– Bi-directional power flow with harmonics within CEA limits
– Remote synchronization capability
– **Black start capability** (critical for grid resilience)
– Four-quadrant control
– Load following for PV smoothing
– Voltage maintenance: ±5% normal, ±10% emergency
– Synchro-check function for parallel operation with grid, diesel, PV

### 7. **Simulation Studies & Model Validation (Annexure-B)**
RE developers must demonstrate compliance with **CEA Technical Standards for Connectivity to the Grid** via:

| Test Domain | Standards Referenced | Key Deliverable |
|————-|———————-|——————|
| **Power Quality** | IEEE 519, IEC 61000 | Harmonic, DC injection, flicker reports |
| **Reactive Capability** | CEA B.2(1) | PQ capability curves at various voltage levels |
| **LVRT (Low Voltage Ride Through)** | CEA B.2(5) | Balanced & unbalanced fault tests; reactive power priority |
| **HVRT (High Voltage Ride Through)** | CEA B.2(7) | At 100%, 50%, 25% active power dispatch |
| **Active Power Control** | CEA B.2(4)(i) | Set point capability & SLDC/RLDC communication |

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## **Key Compliance Deadlines for RE Developers**

| Activity | Timeline |
|———-|———-|
| Submit BESS technical data & test certificates | Before FTC |
| Install telemetry for SLDC monitoring | Before FTC |
| Conduct LVRT, HVRT, power quality studies | Before trial run |
| Submit validated RMS & EMT models | Within 3 months of commissioning |
| Annual power quality assessment | Every year post-commissioning |
| Re-submit models after any plant modification | Within 3 months of change |

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