A review of the Planning methodologies for the

development of the Sabah Transmission Grid Under the 11th

Malaysian Plan

Alexsteir Moris

Engineer (Transmission Planning)

Planning Division, Sabah Electricity Sdn Bhd

Tel: 6088-282471

Email: alexsteir.moris@sesb.com.my

AORC-CIGRE TECHNICAL MEETING 16th to 21st August 2015

The Magellan Sutera Resort, Kota Kinabalu, Sabah, MALAYSIA

Planning cycle

Deterministic Criteria

Value management

Creativity Index

Value based reliability planning

New Planning Methodology

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Table of Contents

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PLANNING CYCLE

Report from previous

report

20-Year Generation

Development Plan 2015

Load survey

Electricity Demand Forecast

2015

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DETERMINISTIC

CRITERIA Thermal limits Voltage limits Stability limits Frequency excursion Short circuit limits

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Frequency limit

Transient study Category A Category B

Stability limit

Short circuit limit

Thermal limit

Voltage limit

Compliance to the Sabah Labuan Grid

Code

As per SESB practice, all the deterministic criteria is a mandatory requirement for SESB to comply.

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Criteria – Thermal Limits

Equipment (All

Transmission

Voltages)

System Condition (Planning Timescales)

Normal Operation Following Secured (N-1)

Contingency Events

Minimum Minimum

Overhead Lines No thermal overloading allowed No thermal overloading allowed

Underground/

Submarine

Cables

No thermal overloading allowed No thermal overloading allowed

Transformers No thermal overloading allowed No thermal overloading allowed

Loss of load is NOT allowed under both system conditions stated above

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Criteria – Voltage Limits

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Nominal

Voltage

System Condition (Planning Timescales)

Normal Operation Following Secured (N-1)

Contingency Events

Minimum Maximum Minimum Maximum

275kV 1.0 p.u. 1.05 p.u. 0.95 p.u. 1.05 p.u.

132kV 1.0 p.u. 1.05 p.u. 0.95 p.u. 1.05 p.u.

Generation

Bus 1.0 p.u. 1.05 p.u. 0.95 p.u. 1.05 p.u.

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Criteria – Stability Limits

Rotor angle Relative rotor angle of any two generating units must not

exceed 180 degrees at any time

Damping Ratio Following a disturbance, the damping ratio of power, angle

or voltage oscillation must not less than 5 %

Voltage

Excursion

Immediately following a fault clearance,

Low Limit : 0.7 p.u. for not more than 400 ms

High Limit : 1.2 p.u. for not more than 30 s

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Criteria – Fault clearing Times

System Voltage

(kV) Fault location

Fault clearance time

ms cycles

275 Substation 100 5

Overhead line/cable 100 5

132 Substation 150 7.5

Overhead line/cable 150 7.5

66 Substation 150 7.5

Overhead line/cable 150 7.5

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Under Normal operating conditions • 49.5 Hz to 50.5 Hz- allow to operate continuously

Under Abnormal system conditions

• 49.0 to 49.5 Hz or 50.5 to 51.0Hz allow to operate for less

than 30 min

• 47.5 to 49.0Hz or 51.0 to 52.0 Hz allow to operate for less

than 1 min

• 47.0 Hz to 47.5 Hz – allow to operate for less than 10

seconds

Under extreme System fault conditions all

generating sets should have disconnected by

this frequency unless agreed otherwise in

writing with the Single Buyer.

• Above 52.0 Hz or below 47.0 Hz below generating set will

be allowed to disconnect without time delay. CCGT may

have a lower high frequency limit, if design limit is lower

than 52.0 Hz but should be lower than 51.5 Hz

Criteria – Frequency exursion

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Criteria – Short Circuit Limits

System Voltage (kV) Equipment Short Circuit Rating Break Capacity

275

40kA, 3s for bulk substation

50kA, 1s for 275kV substation

equipment within Power

Station

132

31.5kA, 3s for bulk substation

40kA, 3s for 132kV and 275kV substation within Power

Station

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31.5kA, 3s

31.5kA, 3s for Power Station equipment and 33kV equipment

within 275kV and 132kV substations

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Transient study criteria

Category Requirements

A (N-0) No Contingencies (system intact)

• System must remain stable • No loss of demand • No cascading outages

B (N-1) Event resulting in the loss of a single element

• System must remain stable • No loss of demand • No cascading outages

C (N-2),(N-1-1) Event(s) resulting in the loss of two or more (multiple) elements

• System must remain stable • Loss of demand is allowed (controlled/planned) • No cascading outages

D Extreme event resulting in two or more (multiple) elements removed or Cascading out of service

• May involve substantial loss of customer Demand and generation in a widespread area or areas

• Portions or all of the Interconnection systems may or may not achieve a new, stable operating point.

• Evaluation of these events may require joint studies with neighbouring systems

VALUE MANAGEMENT

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• For the state of Sabah, most of the electricity project funded by the Federal Government from various Malaysian Plan.

• Under the Malaysian Plan, it is Federal Government Policy that all project funded through Malaysian Plan must conduct a Value Management.

-:Value Management:- Systematic approaches to various disciplines and innovative in order to achieve more Good

value with optimum costs Without prejudice to the level of program and project performance

To determine unnecessary expenses

To simplified method and procedure

To save time, cost and energy

Innovative

To update standard, criteria and objective

To eliminate redundancy items

To challenge assumption and Generate new idea

Value Management

CREATIVITY INDEX

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Based on the latest guidelines from Federal Government required Creativity Index analysis for all federal Government funded project.

•Outcomes of creativity :- Economic outputs stand for the growth of creative economy, but other inventive outcomes present the vitality and vibrancy of creativity in a place. •Structural/institutional capital •Human capital :-High mobility of human capital will facilitate cultural exchange, transfer of skills and knowledge as well as generation of new ideas in society •Social capital :-Social capital, in terms of trust, reciprocity, cooperation and rich social networks are conducive to the enrichment of collective well-being and social expression. •Cultural capital :- Cultural capital refers to the more specific activities and qualities relating to culture, the arts and creativity in everyday life.

•ICT infrastructure •Social and cultural infrastructure •Community facilities •Financial infrastructure

We measure eight types of societal conditions that are contributors to the growth of creativity in a community: •Legal system •Corruption •Freedom of expression

•Entrepreneurship

VALUE BASED RELIABILITY PLANNING

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The value-based reliability transmission planning is a transmission development planning (TDP) methodology in which the cost of TDP is measured against the benefits from reliability improvement.

• The basic concept of value based reliability transmission planning is;

Total Cost = Utility Costs + Customer Outage Costs

• A new conceptual transmission planning method is proposed which considers both the

reliability and economic criteria simultaneously.

• By incorporating the two planning criteria, the proposed planning model can find the

trade-off between satisfying reliability needs and maximizing the economic value of

candidate options.

• Capital cost, • operation and

maintenance (O&M),

• losses, etc.

• The costs due to unreliability supply.

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A new conceptual methodology to be adopted by SESB

Qualitative analysis

Deterministic Probabilistic assessment

Economic analysis

• Space • Way leave • Social impact • Risk of project

implementation

• Using software PSS/E

• Conduct study for all criteria as per mandatory requirement by SLGC

• Reliability analysis of connection scheme.

• Introduction of reliability software

The information will help in identifying

• Scenarios that have high probability or high impact or both Equipment (line, transformer, generator) that causes critical situations

• Facilities (buses and branches) that are most violated.

• The relationship between reliability index and stress level to provide a measurement of system robustness.

• Cost Benefit Analysis

• Creativity Index • Value

management

NEW PLANNING METHODOLOGY

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QUALITATIVE ANALYSIS

DETERMINISTIC CRITERIA

Combining the traditional, new guideline by Federal Government and valued based reliability planning, a comprehensive project proposal established.

CREATIVITY INDEX

PROBABILISTIC ASSESSMENT

ECONOMIC ASPECT

VALUE MANAGEMENT

PROJECT PROPOSAL

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THANK YOU