FEEDER SEPARATION SCHEME IN RURAL AREA
1. As-is situation -
At present rural feeders are feeding power supply to mixed load approximately for average twelve hours. There is no supply during the rest of the day due to constraints in generation. As a result, a number of problems are being faced in the agricultural power supply:Agricultural pumps are normally provided 3 phase supply for six to 8 hours & rest of the period 1 phase supply is made available to three phases so that pumps could not run but DL & F & other load of village may get supply. This is achieved by disconnecting one phase of the 11 KV supply. But this arrangement is not fruitful & effective. Cultivators normally make use of phase splitters to run their motors. This ultimately increases the loading of feeders abnormally. This also causes more failure of DTRs & PTRs besides interruptions. This results in dissatisfaction among villagers. Further this arrangement is having following drawbacks in addition to above.
i) Villagers do not get supply round the clock.
ii) There is unbalanced loading on DTRs & PTRs.
iii) Purpose of load shedding/ regulatory plan gets defeated.
The LT system is lengthy and the existing HT/LT ratio is 1:1.65 resulting in high technical losses in LT lines.
iv) Over exploitation of ground water leading to ground water depletion.
2. Objective of Feeder separation -
2.1 The key objective of the project is to separate domestic load in rural area and for that conversion of existing LT system to HVDS system & AB Cable is proposed.
2.2 To provide uninterrupted, quality power supply to domestic rural consumers, there would be over all development of rural population which will improve their standard of living, improve economic condition thereby achieving over all development in the Company area.
2.3 Flattening of load cure in a judicious way. Therefore reducing the cost of power purchase and reducing the penalty for unscheduled interruption.
2.4 Better Energy accounting for agricultural consumption.
2.5 Reduction of T&D and AT &C losses.
2.6 System strengthening by improving the infrastructure.
2.7 Improved voltage profile to every Domestic Consumer and agricultural consumer.
2.8 Theft of energy will be practically minimized.
2.9 Failure of Distribution Transformers will almost be negligible.
2.10 Chances of adding illegal connections will be completely eliminated.
3. KEY FACTORS –
3.1 The Project is designed to separate domestic load from Irrigation in rural area and for that separate 11 KV feeders along with 11 KV bay and VCB from existing 33/11 KV substation is propose.
3.2 Conversion of existing LT system to HVDS system in inhabitant area of village is taken into consideration. HVDS for 1258 agriculture pump consumers in the area of Nasrrulaganj division in Sehore district.
3.3 All the operations for load Regulatory Measures for feeding supply to villages loads and irrigation loads through these separate feeders will be implemented from 33/11 KV substations. It is intended to keep the residential feeder ON even during regulated supply hours of Irrigation consumers with the help of this scheme.
3.4 Only main villages and Majra Tolas are proposed to connect. Only Majra Tolas listed as per definition in RGGVY will be covered No of provision to connect scattered huts situated in agriculture fields of villages. They will be remaining connected on existing 11 KV irrigation feeders.
3.5 20% of total existing LT line are proposed to be converted from LVDS to HVDS or AB LT cable covering inhabitant area of villages 25 KVA transformers @ Two to Three per village are proposed.
4. BENEFITS OF THE PROJECT
4.1 Theft of energy will be minimized.
4.2 The unauthorized consumers at present are steeling energy by hooking or tapping LT lines feeding to various authorized consumers. After conversion of all LT lines in to HT lines and on AB cable, chances of hooking/ tapping or theft of energy will be eliminated.
4.3 Failure rate of Distribution Transformers will be minimized.In the present system one bigger transformer is feeding to various consumers and due to theft of energy, load increases which causes damage to the distribution transformer. After conversion a dedicated three phase transformer will be provided for group of domestic consumers thus chances of damage due to unauthorized increased load will be eliminated.
4.4 Chances of running illegal motors during supply “OFF” period are completely eliminated. After separation of irrigation load, chances of running illegal motors during regulated period, when no power supply is available, will be eliminated as no supply will be available to the agriculture consumers during this period.
4.5 Significant reduction in T & D Losses – Existing feeder will be bifurcated in to two parts, which will reduce load and length of feeder and eliminate effect of charging current along with misuse which will reduce T&D losses more than 3%.
4.6 Improved voltage profile to every Domestic Consumer.
4.7 Presently due to lengthy LT line and voltage drop, the voltage received at the consumer end drops down. With the provision of DTR's near to the consumer’s group there will be improved voltage profile.
4.8 The internal rate of return (IRR) of project is 26.03 % and payback period 4 years