discussion paper on parallel operation charge - Infraline

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Rs. 0.74 / KVA / Month. This is directly added and is to be paid by the CPP. (Refer section 6.4). (9) Rate of Parallel Operation Charge (POC) in Rs. per kVA per Month = (Charges for net support received by CPP in Rs. / Installed capacity in kVA) + No load charges per kVA This rate can be worked out as average of the 10 sample CPPs included in the study. (10) Total PoC for individual CPP = Rate of Parallel Operation Charge (POC) in Rs.per kVA per Month X (Installed capacity of CPP in kVA - Contracted Demand taken by CPP in kVA – Contracted export power by CPP to the utility in kVA). Due weightage to the contract demand of the CPP and the contracted power for sale by the CPP is considered. 6.2 POWER QUALITY PARAMETERS: In this method, the parallel operation charges have been worked out on the basis of the quantum of distortion/ power quality parameters like current THD and negative phase sequence current, etc. because there is cost on account of increased losses in the network and reduced equipment life due to higher stresses. The levy of parallel operation charge is considered as either 10% or 25 % of demand charges depending on the type and quantum of distortion, the harmonic pollution and negative phase sequence current imposed (10% for mild stress causing loads and 25% for heavy stress causing loads). The generation and transmission related fixed charges per kVA per month can be evaluated as below: (Total generation related fixed cost in crores x 10 7 + Total transmission related fixed cost in crores x 10 7 ) ÷ (12 x 1000 x [Generation capacity connected with CSEB Grid – Installed CPP capacity connected with CSEB Grid] = (508.01 x 10 7 + 185.61 x 10 7 ) ÷ {12 x 1000 x (5093.94 - 2253.69) / 0.9} = Rs.183.16 per kVA per month Therefore, Rate of POC (per kVA per Month) = [ (Fixed charges x Distortion factor) + No load loss charges] This charge would vary from CPP to CPP based on the installed capacity and distortion factor of the respective CPP. Hence to have a uniform rate for all the CPPs, the average rate for ten 26
sample CPPs can be considered. Due weightage can be given to the contracted demand of the individual CPP. Hence, Total POC to be paid by individual CPP = Rate of POC X (Installed capacity of CPP in kVA - Contracted Demand taken by CPP in kVA) 6.3 SIZE OF INTERCONNECTING TRANSFORMER OF CPP Since the transformer gets overloaded for considerable amount of time during motor starting, it is desirable to have the grid transformer of higher capacity. Hence CPPs are providing the interconnecting transformers of higher capacity even though the contract demand with utility is less. Parallel operation charges can be calculated based on the capacity of interconnecting transformers provided. In this method the parallel operation charges can be calculated by following steps: (1) A = Installed capacity in MVA (2) B = Size of interconnecting transformers (3) Support required by CPP can be given as, C = (A) or (B), whichever is minimum. (4) D = transmission related fixed cost. Rate of PoC (per kVA per Month) = {( C x D ) / Installed capacity } + No load loss charges Average of ten samples industries can be taken as the rate of POC. Total, parallel operation charges per month to be given by the individual CPP can be enumerated after giving due weightage for export power and contract demand. Thus total POC to be paid by individual CPP per Month = Rate of PoC X (Installed Capacity – Contract Demand – Contracted Power Export to grid) 6.4 COST OF NO LOAD LOSS: In addition to above, grid bears constantly no load loss on transformers specially installed for those CPPs which have contracted lesser load, energy for this is not fully accounted for in billing. If bulk consumers with captive power plants are operating in parallel with the grid, utility may have to provide power transformer of higher capacity when the captive power plant may be having very small contract demand with utility. This results in much higher transformation capacity at every level than the contracted demand with the utility. With such system the utility bears extra no load losses continuously. The cost of this no load loss is evaluated as below: 27
Page 1 and 2: CHHATTISGARH STATE ELECTRICITY REGU
Page 3 and 4: By the time this judgement was rece
Page 5 and 6: commissioning two new units of 250
Page 7 and 8: Sl.No. Name of Consumers (CPPs) Loc
Page 9 and 10: Thus the provisions of the Electric
Page 11 and 12: (b) The studies mentioned below to
Page 13 and 14: 5.3 HIGHLIGHTS OF MEASURED POWER QU
Page 15 and 16: 5.3.3 POWER FACTOR Fig.5 Power Fact
Page 17 and 18: 5.3.5 REACTIVE POWER Fig.9 Reactive
Page 19 and 20: Table-VI Sr. No. Name of CPP Fault
Page 21 and 22: Also due to higher diversity, in ad
Page 23 and 24: For example, Capacity of captive po
Page 25: (4) As per the tariff order passed
Page 29 and 30: and quantity. Power quality paramet

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