Calculation of PoC Transmission Charges

8/10/2019 Calculation of PoC Transmission Charges

1/78

Point of Connection Methodologyfor

Sharing of Transmission Charges


2/78


3/78

Tracing of Electricity Based on a paper published by Bialek in 1996

Requires base case load flow

Uses concept of proportional flows

Inconsistent with laws of physics

Attempts to identify which generators aresupplying which loads


4/78

Marginal Participation

--- changes in line flows due to incremental1 MW change in generation/load at a nodeis used to determine the participation ofthe node on the lines


5/78

The Procedure

Solve Base case LF on basicnetwork.truncate to 400 kv

Identification of responding buses-tracing

Increment 1 MW Marginal generation/Loadat desired bus absorbed/generated byresponding buses

Calculate line utilization factors

Allocate costs to nodes

Calculate poc rate/nodal prices


6/78

slack

Generator #1

Bus 1Bus 2

Bus 4

Bus 5

Bus 3

Line 1

Line 2Line 3

Line 4

Line 5

Line 6

1

180 MW

0 Mvar

400 MW

0 Mvar

260 MW

0 Mvar

100 MW

0 Mvar

220 MW

0 Mvar

The LF studies have been done using Power World Simulator evaluation/student edition


7/78

P out Records: One MW Marginal drawal at Bus2, Supplied by Generator at Bus 5Bus FlowsBUS 1 1 400.0 MW

GENERATOR 180.00TO 2 2 1 193.07 0 0.0TO 3 3 1 60.21 0 0.0TO 5 5 1 -73.28 0 0.0

BUS 2 2 400.0 MWLOAD 1 261.00TO 1 1 1 -193.07 0 0.0

TO 4 4 1 -67.93 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.21 0 0.0TO 5 5 1 -159.79 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 67.93 0 0.0TO 5 5 1 -167.93 0 0.0

BUS 5 5 400.0 MWGENERATOR 401.00TO 1 1 1 73.28 0 0.0TO 3 3 1 159.79 0 0.0TO 4 4 1 167.93 0 0.0

Pout RecordsBase CaseBus FlowsBUS 1 1 400.0 MW

GENERATOR 180.00 0.0TO 2 2 1 192.62 0 0.0TO 3 3 1 60.38 0 0.0TO 5 5 1 -73.00 0 0.0

BUS 2 2 400.0 MWLOAD 1 260.00TO 1 1 1 -192.62 0 0.0

TO 4 4 1 -67.38 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.38 0 0.0TO 5 5 1 -159.62 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 67.38 0 0.0TO 5 5 1 -167.38 0 0.0

BUS 5 5 400.0 MWGENERATOR 400.00 0.0TO 1 1 1 73.00 0 0.0TO 3 3 1 159.62 0 0.0TO 4 4 1 167.38 0 0.0


8/78

slack

Generator #1

Bus 1Bus 2

Bus 4

Bus 5

Bus 3

Line 1

Line 2Line 3

Line 4

Line 5

Line 6

1

180 MW

0 Mvar

400 MW

0 Mvar

260 MW

0 Mvar

100 MW

0 Mvar

220 MW

0 Mvar

60.38 MW

73 MW

192.62 MW

Contribution of 180 MW generator on line 4= 60.38*180/(180+73)= 42.96 MW


9/78


10/78

slack

Generator #1

Bus 1Bus 2

Bus 4

Bus 5

Bus 3

Line 1

Line 2Line 3

Line 4

Line 5

Line 6

1

180 MW

0 Mvar

400 MW

0 Mvar

260 MW

0 Mvar

100 MW

0 Mvar

220 MW

0 Mvar

P1=253

P2=260

P3=220

P4=167.38

P5=400

1-2=192.62

1-3=60.38

4-2=67.38

5-4=167.38

5-3=159.62

5-1=73.00

Pi = nodal power at node i = sum of injections = sum of withdrawals


11/78

From The Tracing of Electricity J.Bialek, 1996

Contribution of Generator k in line outflowin line i-l emanating from node i=

|Pi-l|*[A

u

-1]ik*P

Gk/P

i

[Au] ij = 1 if i=j

-|Pj-i|/Pj if j belongs to set of

nodes directly supplyingto node i

0 otherwise


12/78

Au Matrix

AuAuInv

1.000 0 0 0 -0.183 1.000 0 0 0 0.183

-0.759 1.000 0 -0.403 0 0.759 1.000 0 0.403 0.307

-0.239 0 1.000 0 -0.399 0.239 0 1.000 0 0.443

0 0 0 1.000 -0.418 0 0 0.000 1.000 0.418

0 0 0 0 1.000 0 0 0 0 1.000


13/78


14/78

From The Tracing of Electricity J.Bialek, 1996

Contribution of Load k in line inflow in linei-j into node i=

|Pi-l|*[A

d

-1]ik*P

Lk/P

i

[Ad] ij = 1 if i=j

-|Pj-i|/Pj if j belongs to set of

nodes directly suppliedfrom node i

0 otherwise


15/78

Ad matrix

AdAdInv

1.000 -0.741 -0.274 0.000 0.000 1.000 0.741 0.274 0.000 0.000

0 1.000 0.000 0.000 0.000 0.000 1.000 0.000 0.000 0.000

0 0 1.000 0.000 0.000 0.000 0.000 1.000 0.000 0.000

0 -0.259 0.000 1.000 0.000 0.000 0.259 0.000 1.000 0.000

-0.289 0.000 -0.726 -1.000 1.000 0.289 0.473 0.805 1.000 1.000


16/78


17/78

Load line contributionLine1(1-2) Line2(4-2) Line3(5-1) Line4(1-3) Line5(5-3) Line6(5-4)

Load (bus2) 192.6 67.38 55.59 0 0 67.38

% 100 100 76 0 0 40

Load (bus 3) 0 0 17.41 60.38 159.62 0

% 0 0 24 100 100 0

load (bus 4) 0 0 0 0 0 100

% 0 0 0 0 0 60

192.6 67.38 73 60.38 159.62 167.38


18/78


19/78

Increase 1 MW load at Bus 2

and as per result of tracing

Generator 1 will respond with 53%that is 0.53 MW and Generator 2will respond with 47% that is 0.47

MW


20/78

slack

Generator #1

Bus 1Bus 2

Bus 4

Bus 5

Bus 3

Line 1

Line 2Line 3

Line 4

Line 5

Line 6

1

181 MW

0 Mvar

400 MW

0 Mvar

261 MW

0 Mvar

100 MW

0 Mvar

220 MW

0 Mvar


21/78

Calculation of Seasonal Index &Marginal Participation Factors


22/78

Seasonal index (for node i line l):

Ue,i,l =(|Flei| - |Fle|).P ie

|Flei| - |Fle| must be >0


23/78

Pout Records: Marginal 1 MW INCR at Bus 2Bus FlowsBUS 1 1 400.0 MWGENERATOR 180.53 0.0

TO 2 2 1 193.33 0 0.0TO 3 3 1 60.31 0 0.0TO 5 5 1 -73.11 0 0.0

BUS 2 2 400.0 MWLOAD 1 261.00TO 1 1 1 -193.33 0 0.0TO 4 4 1 -67.67 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.31 0 0.0TO 5 5 1 -159.69 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 67.67 0 0.0

TO 5 5 1 -167.67 0 0.0


Pout RecordsBase CaseBus FlowsBUS 1 1 400.0 MWGENERATOR 180.00 0.0TO 2 2 1 192.62 0 0.0TO 3 3 1 60.38 0 0.0TO 5 5 1 -73.00 0 0.0

BUS 2 2 400.0 MWLOAD 1 260.00TO 1 1 1 -192.62 0 0.0TO 4 4 1 -67.38 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.38 0 0.0TO 5 5 1 -159.62 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 67.38 0 0.0TO 5 5 1 -167.38 0 0.0



24/78


25/78



26/78

Pout Records Bus 1 INCR 1 MWBus FlowsBUS 1 1 400.0 MWGENERATOR 181.00 0.0TO 2 2 1 193.39 0 0.0TO 3 3 1 60.54 0 0.0TO 5 5 1 -72.93 0 0.0

BUS 2 2 400.0 MWLOAD 1 260.76TO 1 1 1 -193.39 0 0.0TO 4 4 1 -67.37 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.24TO 1 1 1 -60.54 0 0.0TO 5 5 1 -159.70 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 67.37 0 0.0

TO 5 5 1 -167.37 0 0.0



BUS 2 2 400.0 MWLOAD 1 260.00TO 1 1 1 -192.62 0 0.0TO 4 4 1 -67.38 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.38 0 0.0TO 5 5 1 -159.62 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 67.38 0 0.0TO 5 5 1 -167.38 0 0.0



27/78

Line Marginalcase

Basecase

Ue1l

1-2 193.39 192.62 138.6 Ue1(1-2)

1-3 60.54 60.38 28.8 Ue1(1-3)

5-1 72.93 73.00 0 Ue1(5-1)

4-2 67.37 67.38 0 Ue1(4-2)

5-3 159.70 159.62 14.4 Ue1(5-3)

5-4 167.37 167.38 0 Ue1(5-4)

Seasonal Index for node 1


28/78


29/78

Pout Records: 1MW INCR in bus 3 (load)Bus FlowsBUS 1 1 400.0 MWGENERATOR 1 180.20 0.0TO 2 2 1 192.48 0 0.0TO 3 3 1 60.81 0 0.0TO 5 5 1 -73.09 0 0.0

BUS 2 2 400.0 MWLOAD 1 260.00TO 1 1 1 -192.48 0 0.0TO 4 4 1 -67.52 0 0.0

BUS 3 3 400.0 MWLOAD 1 221.00TO 1 1 1 -60.81 0 0.0TO 5 5 1 -160.19 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 67.52 0 0.0TO 5 5 1 -167.52 0 0.0



BUS 2 2 400.0 MWLOAD 1 260.00TO 1 1 1 -192.62 0 0.0TO 4 4 1 -67.38 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.38 0 0.0TO 5 5 1 -159.62 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 67.38 0 0.0TO 5 5 1 -167.38 0 0.0



30/78

Line Marginalcase Basecase Ue3l

1-2 192.48 192.62 0 Ue3(1-2)

1-3 60.81 60.38 94.6 Ue3(1-3)

5-1 73.09 73.00 19.8 Ue3(5-1)

4-2 67.52 67.38 30.8 Ue3(4-2)

5-3 160.19 159.62 125.4 Ue3(5-3)

5-4 167.52 167.38 30.8 Ue3(5-4)



31/78



32/78


33/78


1-2 193.01 192.62 39 Ue4(1-2)

1-3 60.23 60.38 0 Ue4(1-3)

5-1 73.24 73.00 24 Ue4(5-1)

4-2 66.99 67.38 0 Ue4(4-2)

5-3 159.77 159.62 15 Ue4(5-3)

5-4 167.99 167.38 61 Ue4(5-4)



34/78



35/78

Pout Records: bus 5 INCR 1MWBus FlowsBUS 1 1 400.0 MW

GENERATOR 180.00 0.0TO 2 2 1 192.75 0 0.0TO 3 3 1 60.46 0 0.0TO 5 5 1 -73.22 0 0.0

BUS 2 2 400.0 MWLOAD 1 260.31TO 1 1 1 -192.75 0 0.0TO 4 4 1 -67.56 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.44TO 1 1 1 -60.46 0 0.0TO 5 5 1 -159.98 0 0.0

BUS 4 4 400.0 MW 1LOAD 1 100.25

TO 2 2 1 67.56 0 0.0TO 5 5 1 -167.81 0 0.0

BUS 5 5 400.0 MW 1GENERATOR 401.00 0.0TO 1 1 1 73.22 0 0.0TO 3 3 1 159.98 0 0.0TO 4 4 1 167.81 0 0.0


BUS 2 2 400.0 MWLOAD 1 260.00TO 1 1 1 -192.62 0 0.0TO 4 4 1 -67.38 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -60.38 0 0.0TO 5 5 1 -159.62 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 67.38 0 0.0TO 5 5 1 -167.38 0 0.0



36/78


1-2 192.75 192.62 52 Ue5(1-2)

1-3 60.46 60.38 32 Ue5(1-3)

5-1 73.22 73.00 88 Ue5(5-1)

4-2 67.56 67.38 72 Ue5(4-2)

5-3 159.98 159.62 144 Ue5(5-3)

5-4 167.81 167.38 172 Ue5(5-4)



37/78

Marginal Participation Factor( of node i inline l):

Ueil / i Ueil


38/78

Node/bus 1

Bus 2 Bus 3 Bus 4 Bus 5

Line

1-2

0.3346 0.4457 0 .0941 0.1255

1-3 0.1853 0 0.6088 0 0.2059

1-5 0 0.1783 0.1234 0.1496 0.5486

2-4 0 0.4231 0.1728 0 0.4040

3-5 0.0454 0.0574 0.3956 0.0473 0.4543

4-5 0 0.2223 0.0908 0.1798 0.5071


39/78

Share Allocation of Generators

Load 1 Load 2 Load 3

Gen 1(bus1) % 30 20 50

Gen 2(bus2) %

40 25 35


40/78

slack

Generator #1

Bus 1Bus 2

Bus 4

Bus 5

Bus 3

Line 1

Line 2Line 3

Line 4

Line 5

Line 6

1

180 MW

0 Mvar

400 MW

0 Mvar

260 MW

0 Mvar

100 MW

0 Mvar

220 MW

0 Mvar

Zone A


41/78


42/78

Calculation of Uniform Charges

= Total Transmission Charges/(Sum of approvedInjection+Sum of approved Withdrawal)

=803/(400+180+220+260+100)

=69.22 lakhs/MW

For bus 1 =(69.22*180)=125 Cr

For bus 2=(69.22*260) =180 Cr

For bus 3=(69.22*220) =152 CrFor bus 4=(69.22*100) = 69 Cr

For bus 5=(69.22*400) =277 Cr


43/78

Cost allocation to nodes based

on marginal participationNodes Marginal

Participation

case

(Cost in Rs

Cr)

Uniform

Charges

(Cost in Rs

Cr)

50 % Marginal

Participation

50% Uniform

Charges

PoC rates

Rs Lakh

/MW/mont

h

Node/Bus1

75 125 100 4.62

Node/Bus2

185 180 182.5 5.85

Node/Bus

3

162 152 157 5.95

Node/Bus4

70 69 69.5 5.79

Node/Bus5

311 277 294 6.13

Total 803 803 803


44/78

Generator shares

Generator

Loads

Generator Node 1

% share

Generator Node 5

% share

Load bus 2 10 50

Load bus 3 30 30

Load bus 4 60 20


45/78

Node

s

MP-

Trace

UC 50 %

MP &

50%

UC

PoC

rates

Rs Lakh

/MW

/month

Monthly

Charges to

be paid Rs

Lakhs/mont

h based onshare

Monthly

Charges to

be paid Rs

Lakhs/month

based ontrace

Node/Bus 1

75 125 100 4.62(3.47)

Generatornode

Node/Bus 2

185 180 182.5 5.85(5.93)

2830

2905

Node/Bus 3

162 152 157 5.95(6.14)

2294

2596

Node/Bus 4

70 69 69.5 5.79(5.83)

1568

1192

Node/Bus 5

311 277 294 6.13(6.48)

Generatornode

Total 803 803 803

Charges to be paid = own drawal*drawal PoC of node+share*generator capacity*injectionPoC of generator bus(Figures in brackets are based on MP-Trace only)


46/78

Present Issues


47/78

There is no internationally adopted bestcommon method for allocation oftransmission costs.. All methods havetheir pros & cons

Worldwide a combination of methods is

used for allocation such as postage stamp,marginal/nodal pricing, marginalparticipation, average participation, MW-Mile, peak based, game theory etc

Requires not only technical expertise butalso Econimics concepts such as marginalprice, social welfare, etc


48/78


49/78

While we are rightly concerned withcongestion. What if there is overcapacity/stranded assets in a corridor?What if the constructed lines remain lightlyloaded for most part of the year due toerror in planning or change in load

generation scenario over time? What isthe limit of reliability costs?


50/78

In Flow based methods the base case

load generation is very important.. Moreso when the tariff of assets vary widely

50 % Uniform charges distort thelocational signals

Slabbing further distorts the results ofmarginal participation


51/78

Whether a generator/supplier or

Load/Consumer is to be penalized for itsgeographical location?

-----generation zones are predeterminedbased on availability of resources

----load zones/industrial belts are also resultof historical development, resourceavailability

Whether generator or Consumer bepenalized due to asymmetries intransmission network created duringhistorical development of ISTS ?


52/78

Future Concerns

Integration of Renewables in the Grid

---run of the river hydro, wind and solar run

on very low PLF. However, transmissionmust be developed for entire capacity.

---higher transmission cost/unit due to lowPLF which is not under the control of

generator may result in disincentive forgrowth of renewables


53/78

The issue of integration of renewables isbeing debated worldwide now

Can such transmission projects be fundedby Government under NAPCC?


54/78

Changes in Sharing Regulations

contemplated in the thirdamendment regulations


55/78


56/78

Discontinuation of uniform charges

Discontinuation of slabbing

Computation based on full basic networkrather than truncated network

Proportional compensation for use of statelines carrying interstate power


57/78

PoC charges under peak

conditions


58/78

slack

Generator #1

Bus 1Bus 2

Bus 4

Bus 5

Bus 3

Line 1

Line 2Line 3

Line 4

Line 5

Line 6

1

180 MW

0 Mvar

530 MW

0 Mvar

390 MW

0 Mvar

100 MW

0 Mvar

220 MW

0 Mvar


59/78

Pout Records: NEW BASE CASE::150% peak drawalat node/bus-2---supplied by generator node 5Bus FlowsBUS 1 1 400.0 MWGENERATOR 180.00 0.0TO 2 2 1 251.79 0 0.0TO 3 3 1 37.27 0 0.0TO 5 5 1 -109.06 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -251.79 0 0.0TO 4 4 1 -138.21 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.27 0 0.0TO 5 5 1 -182.73 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 138.21 0 0.0TO 5 5 1 -238.21 0 0.0



60/78

Load (bus2)

Load (bus3)

Load (bus4)

Gen1(bus1)

156.78 23.22 0

% 40 11 0

Gen2(bus5)

232.74 197.26 100

% 60 89 100

Total 390 220 100


61/78


62/78

Pout Records: NEW BASE CASE::150% peak drawalat node/bus-2Bus FlowsBUS 1 1 400.0 MWGENERATOR 180.00 0.0TO 2 2 1 251.79 0 0.0TO 3 3 1 37.27 0 0.0TO 5 5 1 -109.06 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -251.79 0 0.0TO 4 4 1 -138.21 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.27 0 0.0TO 5 5 1 -182.73 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 138.21 0 0.0TO 5 5 1 -238.21 0 0.0


Pout Records:: INCR 1 MW at bus 2Bus FlowsBUS 1 1 400.0GENERATOR 180.40 0.0TO 2 2 1 252.44 0 0.0TO 3 3 1 37.17 0 0.0TO 5 5 1 -109.21 0 0.0

BUS 2 2 400.0 MWLOAD 1 391.00TO 1 1 1 -252.44 0 0.0TO 4 4 1 -138.56 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.17 0 0.0TO 5 5 1 -182.83 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 138.56 0 0.0

TO 5 5 1 -238.56 0 0.0



63/78

Pout Records: NEW BASE CASE::150% peak drawalat node/bus-2Bus FlowsBUS 1 1 400.0 MWGENERATOR 180.00 0.0

TO 2 2 1 251.79 0 0.0TO 3 3 1 37.27 0 0.0TO 5 5 1 -109.06 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -251.79 0 0.0TO 4 4 1 -138.21 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.27 0 0.0TO 5 5 1 -182.73 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 138.21 0 0.0TO 5 5 1 -238.21 0 0.0


Pout Records:: 1 MW INCR at Bus 3Bus FlowsBUS 1 1 400.0 MWGENERATOR 1 180.11 0.0TO 2 2 1 251.61 0 0.0TO 3 3 1 37.68 0 0.0TO 5 5 1 -109.18 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -251.61 0 0.0TO 4 4 1 -138.39 0 0.0

BUS 3 3 400.0 MWLOAD 1 221.00TO 1 1 1 -37.68 0 0.0TO 5 5 1 -183.32 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00

TO 2 2 1 138.39 0 0.0TO 5 5 1 -238.39 0 0.0

BUS 5 5 400.0 MWGENERATOR 1 530.89 0.0TO 1 1 1 109.18 0 0.0TO 3 3 1 183.32 0 0.0TO 4 4 1 238.39 0 0.0


64/78

Pout Records: NEW BASE CASE::150% peak drawalat node/bus-2Bus FlowsBUS 1 1 400.0 MWGENERATOR 180.00 0.0TO 2 2 1 251.79 0 0.0TO 3 3 1 37.27 0 0.0TO 5 5 1 -109.06 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -251.79 0 0.0TO 4 4 1 -138.21 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.27 0 0.0TO 5 5 1 -182.73 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 138.21 0 0.0

TO 5 5 1 -238.21 0 0.0


Pout RecordsBus FlowsBUS 1 1 400.0 MWGENERATOR 1 180.00 0.0TO 2 2 1 252.19 0 0.0

TO 3 3 1 37.11 0 0.0TO 5 5 1 -109.30 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -252.19 0 0.0TO 4 4 1 -137.81 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.11 0 0.0TO 5 5 1 -182.89 0 0.0

BUS 4 4 400.0 MWLOAD 1 101.00TO 2 2 1 137.81 0 0.0TO 5 5 1 -238.81 0 0.0



65/78

Pout Records: NEW BASE CASE::150% peak drawalat node/bus-2Bus FlowsBUS 1 1 400.0 MWGENERATOR 180.00 0.0

TO 2 2 1 251.79 0 0.0TO 3 3 1 37.27 0 0.0TO 5 5 1 -109.06 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.00TO 1 1 1 -251.79 0 0.0TO 4 4 1 -138.21 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.00TO 1 1 1 -37.27 0 0.0TO 5 5 1 -182.73 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.00TO 2 2 1 138.21 0 0.0

TO 5 5 1 -238.21 0 0.0


Pout RecordsBus FlowsBUS 1 1 400.0 MWGENERATOR 1 180.00 0.0

TO 2 2 1 251.98 0 0.0TO 3 3 1 37.30 0 0.0TO 5 5 1 -109.29 0 0.0

BUS 2 2 400.0 MWLOAD 1 390.44TO 1 1 1 -251.98 0 0.0TO 4 4 1 -138.46 0 0.0

BUS 3 3 400.0 MWLOAD 1 220.37TO 1 1 1 -37.30 0 0.0TO 5 5 1 -183.07 0 0.0

BUS 4 4 400.0 MWLOAD 1 100.19TO 2 2 1 138.46 0 0.0

TO 5 5 1 -238.65 0 0.0



66/78

Node/bus 1

Bus 2 Bus 3 Bus 4 Bus 5

Line1-2 0.280 0.463 0.000 0.073 0.184

1-30.145 0.000 0.727 0.000 0.128

1-50.000 0.253 0.114 0.104 0.528

2-40.012 0.437 0.127 0.000 0.424

3-50.015 0.105 0.350 0.043 0.487

4-50.008 0.289 0.084 0.127 0.493


67/78

Marginal Line Participation Factors peak case andearlier/average case for line 1--2

0

0.05

0.1

0.15

0.2

0.250.3

0.35

0.4

0.45

0.5

Node/bus 1 Bus 2 Bus 3 Bus 4 Bus 5

peak case

earlier case


68/78

Total charges allocated to

nodes peak case earlier case

0

50

100

150

200

250

300

350

Node/bus 1 Bus 2 Bus 3 Bus 4 Bus 5

peak case

earlier case


69/78

Tabulated data for earlier case

and peak caseNode Earliercost

allocated

to node

Peak

scenario

cost

%

change

Earlier

cost/

Lakh/MW

/month

MP

Earlier

cost/

Lakh/MW/

month

MP+UC

Peak

Scenario

cost/

Lakh/MW/mo

nth

1 75 61 18.66 3.47 4.62 2.82

2 185 218 17.83 5.93 5.85 4.66

3 162 157 3.08 6.14 5.95 5.94

4 70 51 27.14 5.83 5.79 4.25

5 311 316 1.61 6.48 6.13 4.97

While the load at bus 2 had increased 1.5 times the total cost allocated to the nodehas increased only 1.18 times( 1.19 for MP+UC)cost/MW/Month will go down (as MW increased). New entrants/ST customers incentivizedCharges allocated to a node will change only if due to it flow in different lines change.Otherwise the charge may remain same under peak scenario also. May also reduce.


70/78

From CERC sharing of ISTS charges(third amendment) draft


71/78

TABLE 2

DIC Withdrawal/LoadPoC Charges

Scaled PoCCharges

X 45,79,42,697 50,45,52,461

Y 18,96,39,554 20,89,41215


72/78

TABLE 3

Zone Uniform Charges

(UC)\(Rs./Month)=Unifo

rm Rate*LTA

Scaled PoC

Charges

Rs/Month

50% UC and

50% PoC

Rs./Month

LTA (MW) Withdrawal

Charges

(Rs/MW/Month)

X 25,22,12,087 50,45,52,461 37,83,82,274 2,668 1,41,822

Y 16,44,90,088 20,89,41,215 18,66,46,847 1,741 1,07,280

50.46/20.89= 2.42 ; 37.84/18.66 = 2.07


73/78


74/78

TABLE-5

ZoneGeneration

(MW)

Load

(MW)

GenerationCharges

(Rs.)

LoadCharges

(MW)

LTA(Generation)

(MW)

LTA(Demand)

(MW)

GenerationPoC

(Rs./MW/Month)

LoadPoC

(Rs./MW/Month)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

Z 194 2929160

16,64,638 2,160,51,386 280 4784 5945 45166


75/78

TABLE-6

Zone

Generation

PoC

(Rs./MW/

Month)

Load

PoC

(Rs./MW

/Month)

Generation

PoC

(Rs./MW/

Month)

Load

PoC

(Rs./MW

/Month)

Generation

PoC

(Rs./MW/

Month)

Load

PoC

(Rs./MW/

Month)

Generation

PoC

(Rs./MW/

Month)

Load

PoC

(Rs./M

W/Mo

nth)

Software Computed LTA BasedAfter 50% Uniform

charge and 50% PoCapplication

After Slabs

Z 8,594 74,229 5,945 45,166 50,547 72,154 79,544 79,544


76/78

TABLE-7

Sl.No. State /DIC % Allocation

1 BIHAR 42.89%

2 JHARKHAND 8.13%

3 DVC 0.31%

4 ODISHA 31.8% plus temp allocation

5 WEST BENGAL 9.1% plus temp allocation

6 SIKKIM 2.4

7 TAMIL NADU 0.85%

8 NER 3.22%


77/78

TABLE-8

Sl.No. State /DIC % as per participation factor

1 ODISHA 82.97

3 DVC 12.1

5 WEST BENGAL 4.93


78/78

Thank you

Calculation of PoC Transmission Charges

Documents

Transcript of Calculation of PoC Transmission Charges