integrating variable renewable energy resources into the grid...to provide adequate flexibility to...

Taiwan Power Research Institute

Taiwan Power Company

Integrating Variable Renewable

Energy Resources into the Grid

12 May 2020

2

Basic Information of Taipower

Key Grid integration Issues

Summary

1

2

3

4

5

3

Power Plants and Power Grid

4

Decrease coal-

fired power

Maximize

green energy

Achieve

nuclear-free

Energy Transformation for sustainability

Increase gas

power

Gas

Coal

REs

Nuclear

Lower CO2 emission

Provide Flexibility to

REs

Retire aging coal-fired power plants

No new coal-fired power plants after 2025

Decarbonization

RE100 initiative - to

go 100% renewable

Decommission of existing nuclear power plants as scheduled

Note : The estimated peak demand is 40 GW and annual electricity demand is 258 TWh in 2025.

5

2025 2019 2025

Wind 830 6,700

Photovoltaic 3,598 20,000

Hydropower 2,092 2,150

Biomass 623 813

Geothermal 0 200

Fuel cell 0 60

Total 7,143 29,923

Note : The installed capacity of pumped hydro storage (2,602 MW) is exclusive.

Unit : MW

Targeted Capacity of Renewable Energy

RE is variable, intermittent, and

geographically dispersed and raises

the grid integration challenges.

6

Information & Communication Infrastructure

Regulation & Workforce

Smart Dispatch &

Generation

AMI

Grid-scale ESSMarket Design

EVs

H / B / I

EMSPower Grid

Management Energy Storage

Demand Side

Management

Dynamic pricing /

TOU schemes

VPP/ DR programs

Transmission

DA / FA

DistributionAI Forecasting

Big Data Analysis

Rooftop PV

Focus on the six domains

SASA

Home ESS

On-shore

Wind

DERMSADMS

Off-shore Wind farm

Ground-type PV

7

Physical Context:

◼ Storage

◼ Demand response

◼ Flexible gensets

◼ Sufficient reverses

◼ Interconnection

Institutional Context:

◼ RE and ESS related

regulation & grid

code

◼ Accurate forecast

of RE production

◼ New ancillary

services

◼ Improved market

design

◼ Faster dispatch/

energy market -

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

9,000

11,500

14,000

16,500

19,000

21,500

24,000

26,500

29,000

31,500

34,000

36,500

39,00000

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0 Time(5 mins)

PV System Load Net Load ESS+P_Hy Wind

Need rapidly ramp-up

/ ramp-down gensets

Unstable wind output in

winter due to Northeast

monsoon

Optimization of

pumped hydro gensets

Lo

ad

(MW

)

PV

(MW

)

8

Expand &

Harden Grid

Infrastructure

DERs

Management

& Forecasting

Demand Side

& Storage

Integration

Rapidly

Dispatchable

Gensets

Phase I

<5%

Phase II

5-15%Phase III

15-25%Phase IV

>25%

2023~20252019~2022~2018 2026~2035

wind and solar production forecasts (dashed) Rapidly ramp-up / down

Market Design to supply the power system with flexibility

CCGT

Operate efficiently at a

Low minimum Level

Rates schemes VPP / DRFRR / AFC PFR / AGCForecast / DERMS / ADMSSA / DA / FA

Proactive Approach

9

Classifi-

cationsFast Responsive Regulation Spinning Supplemental

Resp.

timems ~ secs secs ~ 3 mins

~ 10 mins(now 30 mins)

~ 30 mins(now 60 mins)

Duration3-15 mins

or more

15 mins

or more

1 hr

or more

2-4 hrs

or more

Year

20251000~1200MW ±1300MW 1000MW 1000MW

Sources

AFC w/ FRR Energy Storage

（590MW）

FRR DR（300 MW）

DR DR (100 MW)

Gensets

(PFR)

630~1110MW

Gensets(AGC)

710 MW

Gensets1000 MW

Gensets1000 MW

Fast Responsive

Regulation

Supplemental

Spinning

Note :

FRR (Fast Responsive Reserve ) : Active when system frequency drop to 59.70Hz

AFC (Automatic Frequency Control) : Active when system frequency drop to 59.50Hz

Ancillary Services in 2025

PFR (Primary Frequency Response )

AGC (Automatic Generation Control)

1

10

2013

2018

2019

2020

2022

2024

202x2018 2020 2024

Deployment of 200k AMI meters Deployment of 3 million AMI meters

Deployment of 1 million AMI meters

400k meters per year 500k meters per yearRolling

review

Deployment of AMI

meters for all extra-

high and high voltage

24,624 customers

Day-ahead Demand Response program

FRR DR Pilot in Kinmen island

Deployment Roadmap

11

0

100

200

300

400

500

600

2018 2019 2020 2021 2022 2023 2024 2025

2 5 9 1838

80

120

160

0 015

30

64

208

367

430

2 524

48

102

288

487

590

Rolling Forecast Model

Taipower-owned ESS Ancillary Service Total

Unit : MWMW

Year

We are here.

12

◼ Renewable energy resources are mandated under the

government energy transformation target in Taiwan.

◼ To provide adequate flexibility to the power grid, the

flexibility options including physical power systems as

well as institutional systems are necessary to be

addressed at the same time.

◼ Taipower will continue to embrace emerging best practices

and lessons learned from other utilities or solution

providers concerning smart grid projects.

Danke schönThank You