Chapter 5: Testing and Commissioning

5.1 Introduction

The Applicant shall perform the testing and pre-commissioning phases of the MSDG as per relevant standards norms. The Applicant shall keep written records of test results and protection settings.

5.2 Testing and Pre-Commissioning

For Greenfield projects, the Applicant shall submit appropriate testing and pre-commissioning procedures and plans to CEB for approval at least 3 (three) months prior to the Scheduled Commercial Operation of the MSDG Facility.

5.2.1 Testing Phase for PV and WTG MSDG Facility

Photovoltaic facility tests include:

• Earthing continuity of array frame to earth
• Polarity of each module string
• PV string Open-Circuit Voltage (Voc) Test
• PV Short Circuit current (Isc) Test
• PV array insulation Test
• Operational Test PV string current
• Functional Test
• Insulation resistance Testing
• Performance verifications

Wind TG Facility tests include:

• 6 hour test run with the generator connected to the grid
• Demonstration of WTG vibration level below acceptable level
• Test of trip function when WTG is generation and grid loss occurs
• Test of over speed trip of each WTG
• Test of yaw drives
• Functional test
• Performance verification

5.2.2 Pre-Commissioning Phase

The Pre-Commissioning tests shall be performed in the presence of the CEB. The pre-commissioning of the electrical system shall include at least the following:

• Demonstration of satisfactory operation of power measurement equipment
• Functional tests of the relay protection and verification of settings
• Demonstration of satisfactory operation of internal reticulation
• Pressure tests on 22kV switchgear
• Reactive Power Capability
• Power Quality Test as per IEC 61400-21
• Anti-islanding
• Test of the facility to withstand step load change

5.3 Power Quality

After satisfactory testing and pre-commissioning of the MSDG installation and submission of the Certificate of Installation, CEB will then perform tests to ensure that the facility is compliant with Section 4.4 of this Grid Code.

5.4 Commissioning Engineer

Given the size and complexity of the MSDG installation, testing and Pre-Commissioning of the facility shall be performed by a Registered Professional Engineer. It is desired that the Registered Professional Engineer possess past experience in the commissioning of similar projects.