Case Study for Improving Disaster Resiliency of

Electric Power Distribution Network In

Philippines

2017

資料６

1

Shikoku Electric Power Co., Inc.

Tokyo Osaka

Shikoku

Hokkaido

Kyushu

2

The study on the incentive mechanism for improving disaster resiliency of electric power distribution network

出典： フィリピン国電力化庁 （NEA）

The Philippines is the 2nd most disaster-prone country per World Risk Report An average for 20 tropical storms or typhoons impact the Philippines each year Typhoon Yolanda left the devastating damage to the Visayas region Total damage to the electricity sector was estimated at PhP 6,830 million , of which, the distribution section accounts for PhP 5,200 million

Improvement of resiliency of the distribution sector is critical in disaster reduction while it requires substantial investment

Establishing of Business Continuity Standard for power distribution system shall mitigate disaster damage and lead to a faster recovery. 3

1. Identify Threats and Risk 2. Upgrade Structure Design of Infrastructure 3. Funding Build Back Better 4. Other Measurements (Warning, community awareness, capacity training, restoring manual)

Source: Department Public Works and Highways(DPWH)

Disaster Resiliency Program for DRRM DRRM: Disaster Risk Reduction Mgt.

“Investment for resiliency & risk reduction will save 5-7 times in

reconstruction and rehabilitation”

4

A Rating System for

Business Continuity Management

An assessment tool on “Preparedness for Natural Hazards” for Electric Distribution System that provides an overall view on the preparedness along with Strong points and areas needing improvement.

Rating should be designed to allow financial institutes to decide if the facility is entitled to preferred financial scheme.

5

Disaster 100%

Time

Electric Supplying

Prompt Recovery Work

Damage

Reduction

Management

Control

in BCM

Faster

Restoration

Key Elements in Business Continuity Management for Electric Distribution Service

6

1) Well Designed Facility for Natural hazard

2) Protection against Secondary Damage

3) Power Distribution Loop and Isolation

4) Additional Protection for Important

Facility

Damage

Reduction

Faster

Restoration

Management

Control

in BCM

1) System Hardening Plan

2) Emergency Response Plan

1) Forecast Power Outage Area

2) Restoration Capability

3) Conditions to Restoration Work

4) Mutual Aid System

Note: Rating indicators are further breakdown into around 50 items in total

Key Elements in Business Continuity Management for Electric Distribution Service

PEC2

Recommended

Basic Wind Speed of

Various Wind Zones

Zone1 = 193 ---270 km/h

(Heavy)

Zone2 = 145 ---240 km/h

(Medium)

Zone3 = 96 ---160 km/h

(Light)

8

Wind Date for Designing the Electric Pole

NEA recommendation of the Distribution Improvement

9

From To

Class of Poles 5, 6 3 or 4

Span 80 , 90 m 50, 60 m

Conductor 1/0, 2/0 3/0 or 4/0

Conductor Insulation Bare Insulated

Substation Feeder 30 to 100 km Less than 20

Storm Guy 2/ km 3 / km

Case study : Prevention Investment

1. Shortening Span 80m---- 50m 2. Class 5 to Class 2

Demonstration site in Bicol area in CASURECO_2 10

Root of Typhoon Durian and Probability of Hit

11

Durian Class Every 3 years

Yolanda Class Every 40 years

Result of the simulation of MAX Wind Speed in Durian Class

Reflect the geographical Terrain on the map

12

Simulation of Fragility Rate( Class 5 to 2 / Span 80 to 50m)

Class 2

80m

50m

80m

50m

Class 2

MAX Wind Speed [m/s]

MAX Wind Speed [m/s]

Frag

ility

Rat

e

Frag

ility

Rat

e

95%

90%

70%

25%

Class 5

Loading Zones (kph) *PEC2 Previous Rural Line Design

Zone1 – Heavy 270 193

Zone2 – Medium 240 145

Zone3 – Light 160 96

75m/s

=270km/h

75m/s

=270km/h

*Philippine Electrical Code Part 2 13

Preventive Investment (Existing 80m to 50m)

Pole Span: 80m, Number of poles: 10 pcs

Pole Span: 50m, Number of

poles: 16 pcs

System Hardening

Pole Span: 80m to 50m (1/1.6)

Number of Poles: 10 to 16 (160%)

14

Pole Class

Span （m） (1) Total pole s (2) Damaged poles (3) rate = (2) / (1)

Existing 5 80 2,673 282 10.5%

Countermeasure （Span）

5 60 3,564 166 4.7%

5 50 4,277 115 2.7%

5 40 5,346 75 1.4%

Countermeasure （Span

& Pole

reinforce）

2 80 2,673 30 1.1%

2 60 3,564 21 0.6%

2 50 4,277 18 0.4%

2 40 5,346 15 0.3%

Result of the estimated damaged poles by Fragility Rate

15

Economic Comparison of Preparedness (Span short / Pole strengthen)

Source: Calculated by Study Team

Almost 2 times

Life time of Pole =40 years

16

17

Results of the Seminar Questionnaire

18

Next Step to Introduce Financial Incentive Scheme on Disaster Resiliency

We believe improving disaster resilience of ECs will lead to stronger stability of electric supply, better financial soundness of ECs in the long-term, and more solid operation base for local companies, which will reduce credit risks of ECs and local companies in the long run.

Next step to realize this financial incentive mechanism for disaster resilience will be: • To consider possible financing to NEA for its preferential lending to ECs • To consider possible funding to LGUGC for its preferential guarantee program • To consider possible two-step loan program for commercial banks’ loans to ECs • To continue discussion on collaboration and bundling of each effort in disaster

risk financing

Disaster risk financing will be important for not only ECs but also other infrastructure sectors and industries. Discussion platform among commercial banks may be required for the financial industry to move forward with its efforts in this field.