Subject: MPERC (Transmission Performance Standards) Regulation – Submission of Compliance Report by MP Power Transmission Company Ltd and Commission analysis thereof:                             

        MP Power Transmission Co.Ltd., (MPPTCL) has submitted the first compliance report of MPERC (Transmission Performance Standards) Regulation 2004. The compliance report on the following performance indicators is required to be submitted in the prescribed formats:

i.                    Voltage Variation

ii.                   Frequency variation

iii.                  Safety standards

iv.                  System availability

v.                   Feeder availability

vi.                  Transformer availability

vii.                 Voltage unbalance

viii.                Neutral voltage displacement

ix.                  Voltage variation index

x.                   Frequency variation index

xi.                  Harmonics in supply voltage

xii.                 System adequacy

xiii.                System security

2.    In compliance the MPPTCL has submitted the report on only the following performance indicators:

i.                    Voltage variation

ii.                   Frequency variation

iii.                  Safety standards

iv.                  System availability

v.                   Feeder availability

vi.                  Substation availability

3.                     The detailed analysis on report of each of the performance parameters is given below:

i.                     Voltage Variation: MPPTCL has submitted the voltage variation report for 400 kV and 200 kV substations only. The voltage variation at 400 KV substation during the year 2004-05 was generally  within the prescribed limits of +5% and -10% except for Bina 400 kV substation where in the  quarters ending on Dec.04 and March 05 the minimum voltage was in the range of -14%. For the 220 KV buses situated in 400 kV substations and in 220 KV substations it is observed that voltage variation in all 400 kV substations was within the range i.e. in between +10% and -10%. For 220 kV substations, the voltage variation was more during the quarter ending on Dec.04 & March 05. The minimum voltage limit violated frequently (in all the four quarters) in the following substations:

The highest order of voltage variation recorded at Gwalior and Malanpur 220 KV substation i.e. -29.09% or 156 KV. Nepanagar 220 KV substation has never witnessed the voltage more than the rated voltage i.e. 220 KV during the year. It remains below 220 KV for all the times.

The minimum voltages recorded at 132 KV and 33 KV buses of the 220 KV substations  also show that the substations where the voltage limits have violated at 220 KV the minimum voltage has also gone down considerably,  i.e. -10% to -25%. The voltage variation in the aforementioned substations at 132 kV and 33 kV was also more than -15%.

The Voltage profile of 132kV and 66kV substations has not been submitted.

Direction: It is directed that MPPTCL should identify the locations where frequently low voltage has been observed and include those projects in the Investment plan. MPPTCL should demonstrate the remedial measures with cost benefit analysis. The voltage profile of 132kV and 66kV substations shall be submitted as the distribution licensee is mostly getting the power from these substations. 

ii.            Frequency Variation: The frequency variation chart for all the four quarters indicates that during the period from April 04 to Sept.04 for about 90% of time the frequency was in the range of 49.5 Hz to 50.5Hz and from Oct.04 to March 05 the frequency was in the range of 49.0Hz to 50.0Hz. This indicates that the frequency was within the limits during the year 2004.05.

iii.                              With regard to confirmation report on security standards, it is confirmed by MPPTCL that the Indian Electricity rule 1956 have been complied with except for very old few 132 kV transmission lines which are on double pole structure and where ground wire shielding for the line is not provided, but the protection against the lightning has been provided at substations.

Direction: MPPTCL is directed work out the cost benefit analysis if such   transmission lines on rail pole are converted into tower line.

iv.                             The overall system availability was above 98.8% during the year. The quarter wise details are given below.

v.                               With regard to the availability of lines, for the quarters ending in June 2004 and September 2004 the availability was about and above 95% except for 220 kV Katni - Damoh DCDS line was available for 70% of time. In the quarter ending December 2004 the availability of all the transmission lines was more than 95% except 220 kV Ujjain-Modak line (availability – 93%). During the quarte ending March 2005, except for 132 KV Chhegaon – Talwadia Railway traction feeder (availability - 74%), for Bhopal – Bairagarh 220 KV line (availability - 67%) and 400kV Itarsi –Bhopal line (Availability – 92%), the availability for all the transmission lines was 95% or more..

Direction: MPPTCL is directed to pay special attention where the availability of lines is less than 95% and analyze the cause. The reason for low availability of Chhegaon – Talwadia Railway traction feeder and Bhopal – Bairagarh 220kV line should be analyzed and informed to the Commission..

vi.                              With regard to the transformer availability, except for the following transformer the availability was generally more than 95%.

Direction: MPPTCL is directed to pay special attention where the availability of lines is less than 95% and analyze the cause. The reason for low availability of Indore 132 kV Chambal substation, Nepanagar 220kV substation, Jamli 132kV substation and Neemuch 220kV substation should be analyzed and informed to the Commission.

                       Due to difficulty in collection of the data, the compliance report on the following performance indicators have not been submitted by MPPTCL. It is directed that the MPPTCL should immediately start collecting the data and submit the detailed compliance report as envisaged in the Transmission Performance Standards Regulation to the Commission.

i.                    Voltage Unbalance

ii.                   Neutral Voltage Displacement

iii.                 Voltage Variation Index

iv.                 Frequency Variation Index

v.                   Harmonics in Supply Voltage

vi.                 System Adequacy and

vii.                System Security