Distrubition System Plan
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Distrubition System Plan Present Situations of Distribution System Present Operating Situations of Transmission / Distribution System in Jordan Jordanian power system which is consisted by Transmission System (hereinafter refered to as T/L) and Distribution System (hereinafter refered to as D/L) is planned, designed, constructed, operated, and maintained by one T/L company (NEPCO) and three Distribution Companies (JEPCO (Jordanian Electric Power Co.), IDECO (Irbid District Electricity Co.), and EDCO (Electricity Distribution Co.)). Each distribution company has responsibility for operating D/L in each region, and they have operation right of regional monopoly. In specific, Figure 7.1-1 shows the responsibility area of each distribution company. JEPCO: Central region of Jordan (Amman, Zarqa, Salt, and so on) IDECO: North west region of Jordan (Irbid, Jarash, Mufraq, and so on) EDCO: Southern and Eastern region of Jordan (Aqaba, Ma’an, Tafila, Karak, Jordan Valley, Eastern region) IDECO JEPCO Jordan EDCO Legends: ■:EDCO ■:IDECO ■:JEPCO Source: JICA Study Team Figure 7.1-1 Responsible Area of Each Distribution Company Overview of JEPCO (1) Overview of JEPCO’s Operational Formation JEPCO has a responsible for distributing electricity power which is supplied by NEPCO to end users, and they operate 33 kV, 11 kV, and 415 V electricity power facilities. 7-1 Headquarters of JEPCO is located in Amman, and they operate the distribution facilities from secondary side bus of each BSP to terminals of end user. Organization chart of JEPCO is shown in Figure 7.1-2. JEPCO buys the electricity power from NEPCO, and the boundary point of trading is secondary side of BSP. Also, JEPCO sells the electricity power to the users which has 6.6 kV or 415 V receiving facility, and they operates distribution transformers, middle voltage (hereinafter refered to as MV) distribution networks, pole mounted type low voltage (hereinafter refered to as LV) transformers, and LV distribution networks. Source: JEPCO Figure 7.1-2 Organization Chart of JEPCO (2) Overview of Distribution System in JEPCO Table 7.1-1 and Table 7.1-2 show the present situation of installed distribution lines and transformers in JEPCO area. 33 kV and 11 kV MV network is extended from BSP, and the basic configuration of MV network is radial network. Although the loop configurations are installed partially, the loop networks are sectioned by normally open switches in normal operation situation. Also, there are some connection lines between different BSPs by MV line with normally open switches. The features of JEPCO responsibility area is high density urban area around capital Amman. Therefore, 7-2 46% of 33 kV network and 74% of 11 kV network are installed on underground level. Mainly, 33 kV network is applied to high density user areas in Amman is rural areas, and 11 kV network is applied to other areas of Amman. On the other hand, 95% of LV networks are consisted by overhead lines which are extended from LV transformers installed on underground level, and LV lines are extended to end users. The present installation situation of LV lines in Amman city is shown in Figure 7.1-3. Although average distance of LV lines in Amman city is around 600 m, the average distance of LV lines in overall JEPCO area is over 1.0 km, also around 6.0 to 7.0 km LV lines are existing in JEPCO area as one of severe case. JEPCO has SCADA for monitoring and controlling of their network. It is a unique feature of three distribution companies in Jordan. Table 7.1-1 Present Situation of Installed D/Ls in JEPCO No. Description Quantity Unit Remarks 1 33 kV System 33kV Line 1) Overhead 1,953 km 2) Uuderground Cable 1,665 km Total 3,618 km 2. 11 kV System 11 kV Line 1) Overhead 1,015 km 2) Underground Cable 2,938 km Total 3,953 km 3 415 V System 415 V Line 1) Overhead 3,799 km 2) ABC Cable 3,662 km 3) Underground Cable 407 km Total 7,868 km Total 15,439 km Source: CESI Table 7.1-2 Present Situation of Installed Transformers in JEPCO No. Description Quantity Unit Remarks 1 33/11 kV Transformers 193 - 2 33/6.6 kV Transformers 3 - 3 33/0.415 kV Transformers 2,245 - 4 11/0.415 kV Transformers 7,160 - 5 33/0.240 kV Single Phase Transformers 9 - 6 11/0.240 kV Single Phase Transformers 7 - Total 9,617 - Source: CESI (3) Overview of Power Trading in JEPCO Table 7.1-3 shows that actual results of electricity power trade which includes buying ([GWh], and [MJOD]), and selling ([GWh], and [MJOD]) and distribution losses ([GWh], and [MJOD]) in several years. Although the distribution losses are increasing along with growth of electricity power trading, the 7-3 increase rate of distribution losses is higher level than the growth rate of trading. Therefore, efficiency of energy using is going down in present situation. Also the average of growth rate of economical damage given by distribution losses is 16.0 % in few years. Considering with GDP growth rate which is around 3 % or 4 % in few years, countermeasures of reducing distribution losses should be carried out promptly. Interface point between UG and OH of LV line Start point of LV OH line Source: JICA Study Team Figure 7.1-3 Example of 415 V OHL in Amman City Table 7.1-3 Overview of Electricity Trading by JEPCO No. Description [Unit] 2011 2012 2013 2014 AAIR Remarks 1-1 Buy from NEPCO [GWh] 9,218 9,813 9,871 10,305 3.81 1-2 Sell to Users [GWh] 8,008 8,473 8,511 8,759 3.05 1-3 Energy Loss [%] 13.1 13.7 13.8 15.0 4.62 To estimate performance of overall Electricity Sector, Average Cost [JOD/kWh] defined in NEPCO’s 2-1 Buy from NEPCO [MJOD] 1,197 1,430 1,434 1,614 10.8 annual report is used. (other cost estimates are also conformed to this rule.) 2-2 Sell to Users [MJOD] 1,040 1,234 1,237 1,372 9.93 2-3 Economical Loss [MJOD] 157 195 198 242 16.0 Source: NEPCO Overview of IDECO (1) Overview of IDECO’s Operational Formation IDECO has responsibility for distributing electricity power which is supplied by NEPCO to end users, 7-4 and they operate 33 kV, 11 kV, and 415 V electricity power facilities. The headquarters of IDECO is located in Irbid, and they operate the distribution facilities from secondary side bus of each BSP to terminals of end user. IDECO buys the electricity power from NEPCO, and the boundary point of trading is secondary side of a BSP. Also, IDECO sells the electricity power to the users which has 6.6 kV or 415 V receiving facility, and they operates distribution transformers, MV distribution networks, pole mounted type LV transformers, and LV distribution networks. (2) Overview of Distribution System in IDECO Table 7.1-4 Present Situation of Installed D/Ls in IDECO No. Description Quantity Unit Remarks 1 33 kV System 33kV Line 1) Overhead 2,732 km 2) Uuderground Cable 238 km Total 2,970 km 2. 11 kV System 11 kV Line 1) Overhead Enough short km 2) Underground Cable Dominant km Total 330 km 3 415 V System 415 V Line 1) Overhead No Data km 2) ABC Cable No Data km 3) Underground Cable No Data km Total more than km 4,000 Total more than km 10,270 Source: CESI Table 7.1-5 Present Situation of Installed Transformers in IDECO No. Description Quantity Unit Remarks 1 33/11 kV Transformers 31 - 2 33/0.415 kV Transformers 3,188 - 3 11/0.415 kV Transformers 396 - Total 3,615 - Source: CESI Table 7.1-4 and Table 7.1-5 show the present situation of installed distribution lines and transformers in IDECO area. 33 kV and 11 kV MV networks are extended from BSPs, and the basic configuration of MV network is radial network. Although the loop configurations are installed partially, the loop networks are sectioned by normally open switches in normal operation situation. Also, there are some connection lines between different BSPs by MV line with normally open switches. 7-5 11 kV feeders are mainly applied to high density urban area such as Irbid, and almost 11 kV cables are installed on underground level. Average distance of 11 kV feeders is 3.7 km, and the maximum distance is 14.0 km. On the other hand, in general, the length of 33 kV MV feeder is long because it is installed to supply electricity power to the rural area e.g. average length is 65.5 km and maximum length is 190 km. IDECO doesn’t have own SCADA, and the upstream system in IDECO is monitored and controlled by NEPCO’s SCADA. However, system updating of NEPCO’s SCADA always doesn't follow the latest feeder installation situation in IDECO, so that the handled data in NEPCO’s SCADA has a little bit error from truth value. (3) Overview of Power Trading in IDECO Table 7.1-6 shows that actual results of electricity power trade which includes buying ([GWh], and [MJOD]), and selling ([GWh], and [MJOD]) and distribution losses ([GWh], and [MJOD]) in several years. Growth rate of electricity power trading is the highest out of all distribution companies in Jordan, and it means that developing speed of IDECO’s area is the highest out of all areas in Jordan. Although the distribution losses are also increasing, the level in IDECO is lower compared with average distribution losses in Jordan; 13.8 %.