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1. ENGINEERING AND SERVICE
Design and Consultancy
Feasibility Studies
Technical Services
Substation and Powerplant condition assessments and surveys
Building Services
Design/Specifications and project management for commercial and industrial installations
Earthing Design and Transient Analysis
Electrical interference studies with other services
Power Quality
Protection
Protection scheme design and specification for Generation, Transmission and Distribution systems
Power System Analysis
Full range of power system analysis studies ( Load Flow, Short Circuit, Harmonic, Protection Co-ordination, Dynamic Stability)
2. POWER SYSTEM STUDIES
Specialized computer hardware and software can assist with analysis of power system problems. A computer model enables the engineer to readily perform complex calculations and to evaluate the performance of the system by simulation. After the study has been completed, a copy may be retained which could reduce the cost of future updates. This copy can be especially helpful if an arc flash study is required.
Load Flow and Power Factor Studies
Load flow studies are used to predict normal current flows and voltages. They are also used to determine voltage levels that will result from motor starting or other transient loading conditions. These results can be used to adjust transformer tap settings or take other measures that will avoid problems due to under or over voltage. Motor and lighting load can cause low power factor – resulting in higher current flow and possible utility bill penalties. A power factor study can identify solutions that will Reducetotal system loading and provide a positive impact on cash flow.
Short Circuit Studies
Modern electrical power systems must function properly in the event of an insulation failure (fault) and the resulting short circuitcurrent. Overcurrent protective devices, such as circuit breakersand fuses, are designed to interrupt the short circuit current safely with minimum equipment damage and minimum disruption to the facility’s operation. Other parts of the system, such as transformers, cables, busways and switches, should be able to withstand the mechanical and thermal stresses resulting from the flow of short circuit current. Personnel injury, extensive damage and prolonged downtime can result if the power system equipment is not adequately rated for the available fault current. Additionally, the National Electrical Code requires that overcurrent protective devices: “shall have an interrupting rating sufficient for . . . the (fault) current that is available . . .”
A system short circuit study will determine the magnitude of fault current and whether equipment is properly rated to interrupt or withstand the short circuit.For new facilities, a short circuit study should be performed before the electrical equipment is selected. For existing facilities, a short circuit study should be performed if significant changes have occurred either within the facility or in the utility system.
Arc Flash Hazard Analysis
The National Fire Protection Association Guidelines (NFPA 70E) require facility owners to perform an arc flash hazard analysisprior to allowing a worker to perform a task on energized equipment.
NFPA 70E is referenced in the OSHA 1910 standard. The arc flash analysis identifies the presence and location of potential hazards and provides recommendations for PPE, boundaries for limited, restricted and prohibited approaches, recommendations for flash protection, and safe work practices.
Coordination Studies
The protective device immediately upstream of the location of the fault should isolate the short circuit quickly and minimize damage and service interruption. If the protective device fails to isolate the fault in a predetermined time, the backup devices further upstream should operate in a coordinated fashion.
Power system study engineers perform coordination studies to select proper settings or sizes for relays, breakers and fuses. The engineer must often arbitrate between competing solutions to achieve maximum protection while ensuring minimum service interruption.
Harmonic Studies
Power quality problems due to harmonic voltage and current distortion have become more common occurrences due to the increasing number of non-linear loads such as variable speed drives, UPS’s and computers.Harmonic studies involve mathematical modeling of the power system to identify potential power quality problems and to evaluate possible solutions. Harmonic studies can be performed before system installation or after a power quality problem has been identified in an existing system.
Conditions which may require a harmonic study:
PROJECT REFERENCE
No | Customer | Project | Description of Scope |
1 | PT DSS KARAWANG 1 | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. DSS Karawang 1 (member of APP-Sinar Mas Group) is coal power plant which supply electricity to Pindo Deli (paper mills plant) around 30MW, syncronizing between power plant and PLN to be done through power transformer 3 x 50MVA, 70/20kV
| 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination 3. Transient stability and load sheeding studies to assess system responses to events such as fault disturbances, generation trips / start up etc. 4. Harmonic studies to asses harmonic distortion levels and penetration and effectiveness of any potential mitigation measures | ||
2 | Rimau Electric | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Rimau Electric is owner of coal power plant at tamiyang Kalimantan Tengah which supply electricity to PLN 2 x 3.5MW, synchronizing with PLN at 20kV feeder | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination | ||
3 | PT Indokomas Buana Perkasa | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Indokomas is contractor of coal power plant 2 x 7MW at Berau Kalimantan Timur which supply electricity to PLN, synchronizing with PLN at 20kV | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination | ||
4 | PT Arena Maju Bersama | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT Arena is owner of coal bed methane genset power plant 10 x 700kW at Tayan-West Kalimantan which supply electricity to PLN, synchronizing with PLN at 20kV | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination | ||
5 | PT Bayu Bumi Gemilang | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Bayu Bumi Gemilang is owner of gas engine power plant which supply electricity to PLN and Industrial customer at Belimbing Bontang, 4 x 2MW, synchronizing with PLN at 20kV | 1. Protection studies to determine protective device settings to achieve coordination 2. Transient stability and load sheeding studies to assess system responses to events such as fault disturbances, generation trips / start up etc. | ||
6 | PT Bayu Bumi Gemilang | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Bayu Bumi Gemilang is owner of gas engine power plant which supply electricity to Industrial customer at Gresik, 4 x 2MW, synchronizing with PLN at 20kV feeder | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Power Quality Investigation, including measurement and analysis of harmonic distortion, voltage flicker, voltage dip; Demand (real, reactive, pf etc); transient short circuit. | ||
7 | PT Garuda Maintenance Facility | Power System Study | 1. Power Quality Investigation, including measurement and analysis of harmonic distortion, voltage flicker, voltage dip; Demand (real, reactive, pf etc); transient short circuit. |
PT Garuda indonesia facility is owner of maintenance facility is owner of maintenance facility of air plane at Cengkareng Soekarno Hatta airport, the distribution system using medium voltage system 20kV from PLN | 1. Assessment, design and specification of remedial measure to improve power quality, transient performance etc. | ||
8 | PT Hasta Prajatama | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Hasta Prajatama is contractor of mycrohidro powerplant 3 x 3MW at Cilaki 2 West Java which supply electricity to PLN, synchronizing with PLN at 20kV feeder | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination | ||
9 | PT Bina Guna Kimia | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Bina Guna kimia (FMC group) is owner of fertilize plant at semarang central java, the plant distribution system (1MVA) using medium voltage system 20kV from PLN, and low voltage 400V system | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination 3. Power Quality Investigation, including measurement and analysis of harmonic distortion, voltage flicker, voltage dip; Demand (real, reactive, pf etc); transient short circuit. 4. Assessment, design and specification of remedial measure to improve power quality, transient performance etc. 5. Measurement of the local soil resistivite caracteristic for substation and generation protection 6. Design and specification of generation and substation earthing system to meet electrical and lightning protection system requirement and produce safe step and touch potential 7. Measurement of impedance of installed earthing system | ||
10 | PT Indo Korsa | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. 2. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. |
PT Indo Korsa is owner of tire plant at citereup west java, the plant distribution system (20MVA) using meium voltage | 1. Motor Starting Studies | ||
11 | PT ASUKA Engineering Indonesia | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
PT. Hasta Prajatama is contractor of oxygen plant at cilegon west java which have power distribution around 40MVA, Using 11kV and 400V power distribution | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination 3. Motor Starting Studies | ||
12 | AKUO Energi Indonesia | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
Akuo Energy Indonesia as a leading company in renewable energy technology industry is planning to interconnect its generated electricity from the Solar PV Power Plant to the national grid (PLN). | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. 2. Protection studies to determine protective device settings to achieve coordination 3. Transient stability and load sheeding studies to assess system responses to events such as fault disturbances, generation trips / start up etc. | ||
13 | PT ASUKA Engineering Indonesia | Power System Study | 1. Load flow studies to asses equipment rating and loading, voltage profile, losses etc. |
Power assessment in PT Cargill Serang Plant | 1. Fault level studies to, short circuit current levels and flows to asses equipment capabilities and undertake protection co-ordination studies. | ||
14 | Suveiyor Indonesia | Power System Study | 1. Grounding Grid Study |
PT Antam 2 x 30 MW CFPP Antam Pomalaa | |||
15 | PT ASUKA Engineering Indonesia | PT Holcim | Testing and calibration protection relay and KWh meter |
16 | PT Industira | PLTMH Cirompang | Design and manufacturing neutral grounding Transformers |
17 | PT Indokomas Buana Perkasa | PLTU Berau | Design and manufacturing neutral grounding Transformers |
18 | PT Cyma Engineering Indonesia | LV main distribution and lighting panel | |
19 | Sinohydro | PLTA Jatigede | Manufacture lighting pole and transmission pole installation |
20 | PT Navitas | Design and manufacturing neutral grounding Resistor | |
21 | PT. SINAR BAHANA MULYA | CITRA GREND CIPUTRA GROUP | Installation cable gardu LNK AND SUPLAY KABEL |
22 | PT. ELEKTRINDO UTAMA INDONESIA | SIEMENS | Power Study and Relay Coordination Report |
23 | PT. BBRI | PT. BBRI | Maintenane MCC, Switchgear and motor |
24 | PT. SECAR TECHNO | PT. SECAR TECHNO | Maintenance Magnetblast Breaker |
25 | PT. WIJAYA KARYA | Power System Study | |
26 | PT.Arena Maju Bersama | PLTGB TAYAN Kalimantan Barat 9 x 1000 KVA | Outgoing MV 20 KV SwitchGear Incoming MV 20 KV SwitchGear PT BUS MV 20 KV SwitchGear Oux Travo 20 KV SwitchGear Interface LV SwitchGear LV SwitchGear Main Distribution Panel Battery and Charger 24 VDC Lighting Panel NGR 20 KV Outdoor KWH Panel Installation, Testing and Commissioning |
27 | PT.Rimau Elektrik | PLTU Tamiyang 2 x 3 MW | Metal Clad Out Going 20kV Metal Clad Incoming 20kV KWh Panel Battery and Charger Lighting Panel NGR Installation, Testing and Commissioning NGR Installation, Testing and Commissioning |
28 | PT.Zug Industry | PLTU Tamiyang 2 x 3 MW | Generator Control Panel 2 x 350 kVA LV SwitchGear Testing and Comissioning (20kV, 6.6 kV swgr) consist of 12 switchgear Installation, testing and commisioning |
29 | PT. Andys Kencana | Gedung Senat Unibraw | Ligthing Protection Distribution Board Fire Alarm CCTV Lighting Panel installation, and commisoning |
30 | PT. ZUG Industry | PLTU Sangau 2 x 7MW | Fire Alarm installation and commisoning |
31 | PT. DSS Karawang 1 | Power Study and Maintenance service | PT. DSS PLTU 30MW Power Study Transient Stability and Load sheeding Service Relay Protection & Circuit Breaker |
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