Promoting Technical Quality Measures for PV Mini-grid Development in Indonesia

Transcription

1 Promoting Technical Quality Measures for PV Mini-grid Development in Indonesia Presented on Off-Grid Power Conference at Intersolar 2017 By Amalia Suryani, Team Leader of EnDev Indonesia Munich, 31 May 2017

2 PV Mini-grid Program for Rural Electrification Size: 1.9 million km 2 (land), 3.2 million km 2 (water) Population: 250+ million Electrification ratio: 91.6% (nation-wide, outlook 2017: 92.75%) Border areas <60% Electrification ratio 1,760 km Jakarta 5,120 km Outer islands 2

3 Unit MW (cumulative) Household (cumulative) 1.7 MW 5 MW 7.6 MW 13.2 MW 16.7 MW 10,272 27,518 40,052 63,620 77,933 3

4 Mini-grid Service (MSP) Process Input Evaluation Process Output General information of PV mini-grid systems PV mini-grid specifications On-site technical measurement Guided observation on workmanship Social and management survey Tools: camera, GPS, multimeter, checklists Data analysis Cross-checking with photos Clarification with inspector/surveyor Evaluated by 2 engineers Scoring Tools: photos, completed checklists, questionnaire and form Compiling Technical Summary Reports Technical Summary Report Installation score of each PV mini-grid Evaluation of EPC s performance Complete documentation Recommendations for future implementation Inspection guide for Photovoltaic Village Power (PVVP) Systems: 4

5 MSP tools Component compliance check aims to verify tangible components installed at the sites (inclusive of power plant and distribution network) against the contractual obligations as specified in the contract. Performance verification (recording & measurement) is an indicator to demonstrate whether a system is functioning optimally and if all the components are installed and configured correctly. Workmanship quality check aims to assess whether the quality of installation adheres to local and where practical, international best practices, safety requirements and its effect on installation sustainability. 5

6 Rating (%) Mini-grid Service (MSP) Mini-grids constructed Mini-grids Inspected EPC contractors MSP budget ( ) 353, , ,700 Budget per site 3,155 3,352 2,815 Ratio to construction cost 2% 1.8% 1.3% Component compliance Performance verification Workmanship quality Inspection was conducted 5 months after commissioning date (in average). Year of inspection MSP 2013 is to inspect program in 2012 (generally commissioned at the end of the year). 6

7 Impact of MSP to workmanship quality % of fault occurred (1) % of fault occurred (2) 60% 40% 40% 48% 30% 20% 24% 20% 23% 10% 11% 0% % 0% 4% PV module quality PV module array foundation PV array mounting structure PV module wiring PV array combiner box and wiring Wiring to power house Battery terminal connections Internal power house wiring Household installation Grounding and earthing There are 20 categories in workmanship quality, each consists of several indicators. From year to year, there were also improvements on these workmanship indicators. 7

8 Major improvements Natural selection of contractors Improving workmanship quality Improving installation safety Significant enhancement on mounting structure and module quality Robust tools to check technical quality 8

9 Case study 1 PV array losses* 2.8% SCC losses 0.6% Battery losses 6% Inverter losses 2% Case 1: JaTengS % Consumed by the load Costumers Streetlights : Wh (max) = 19.5 kwh : W in 5 h = 1 kwh PV capacity Configuration Battery inverter : 15 kwp : DC Coupled 48 V : 3 x 6 kw = 18 kw Energy curtailment 62.7% Sankey Diagram based on data acquired in 6 months Battery : 144 kwh Lead acid Average irradiation : 4 kwh/m 2 /day *) Losses due to shading, temperature increasing, MPPT mismatch, array mismatch, PV module quality losses, wiring 9

10 Case study 2 PV array losses* 3.6% Grid inverter losses 0.4% Battery losses 3.8% Inverter losses 4.8% Case 2: MalS11 22% Consumed by the load Costumers : Wh (max) = 40.8 kwh Capacity : 50 kwp Streetlights : W in 5 h = 1.5 kwh Configuration Grid Inverter Battery Inverter : AC Coupled 48 V : 2 x 15 kw ; 1 x 20 kw : 9 x 6 kw Sunny Island Energy curtailment 65% Sankey Diagram based on data acquired in 10 months Battery : 432 kwh lead acid Average irradiation : 5.6 kwh/m 2 /day *) Losses due to shading, temperature increasing, MPPT mismatch, array mismatch, PV module quality losses, wiring 10

11 Energising Development Partnership Funded by: Coordinated by: Thank you! 11