Regulation of electricity sector is guided by National Energy Policy, 2003, EWURA Act, Cap. 414, Electricity Act, Cap. 131 and Electricity (General) Regulations GN 63. To facilitate implementation of these legislation, EWURA Act (S. 40) gives EWURA powers to make rules with respect to regulated services and supply.
Since its establishment, EWURA has developed and put into operation various rules related to regulation of electricity sector in mainland Tanzania. The rules currently in force include The Electricity (Transmission Services) Rules, 2011; The Electricity (Distribution Services) Rules, 2011; The Electricity (Generation Services) Rules, 2011; The Electricity (Supply Services) Rules, 2013; The Electricity (Licensing Fees) Rules, 2012. Most recently developed rules include Electricity (Initiation of Procurement of Power Projects) Rules, 2014, Electricity (Development of Small Power Projects) Rules, 2014, Electricity (Supply Operations) Rules, 2014
- Technical Regulation
With respect to technical regulation, EWURA issue licenses and monitor performance of service providers in electricity sector focusing on quality of service, quality of supplies, compliance to environmental and safety requirements. Performance monitoring is done through review of reports from service providers and through regular or specific inspections in existing service provider’s infrastructure or proposed sites
- Monitoring and Inspection
The Authority conducted routine inspections on Low Voltage (LV) and Medium Voltage (MV) distribution networks. EWURA shared with TANESCO field inspection reports for their immediate action and improvements. In the period of July 2013 to June 2014, twenty one (21) inspections were conducted which revealed that some distribution lines and poles needed immediate replacement while some distribution transformers were not well mounted, which could lead to falling of transformers or causing danger to the public. In efforts to carry out infrastructure and pre-licensing inspection in electricity generation, transmission and distribution facilities, EWURA has developed Electricity Technical Audit Manual. The Manual will be useful for the Authority’s Inspectors as well as for Licensees. Please download the Manual for more details…
- Quality and Standard of Services
The Authority to monitor quality of service through the set standards with a focus on system disturbances such as low frequency, high frequency, low voltage, power outages and load shedding. Further, the Authority monitored compliance of key performance indicators. It was revealed that the system experienced ﬂuctuations of voltages and frequencies. In this regard, the Authority has allowed funds through the Multi-Year Tariff Order for capital investment projects to address these problems.
- Generation and Distribution Capacity
For the year 2014, a total of 6,085.92 GWh were generated from TANESCO owned plants, independent power producers and imports from neighbouring countries. About 5,447.22 GWh were supplied to customers through distribution lines as shown in Tables 3 and 4. The Maximum Demand attained was 934.62 MW, recorded on 12th December 2014. The installed capacity in the main grid is 1320 MW and 81 MW in the isolated grid , view details.
- Generation Mix
In 2014, the electricity generation mix consisted of; hydropower 33%, natural gas 47% and diesel 20% as shown in Figure 1. In comparison to the previous years there is a decline of hydropower contribution in the generation mix. This decline was mainly caused by shortage of rainfall in the catchment areas. In 2014 thermal power plants including the emergency ones had to be dispatched more to bridge the generation gap.
- Customer Base
As at 31st December, 2014, the Authority recorded a number of connected customers for TANESCO and Mwenga Hydro distribution systems as 1,297,562 and 904, respectively. The rate of connecting new customers appears to be high aiming at meeting the Government target of 30% access by end of 2015. New strategies are required to increase the rate of connecting new customers in line with the anticipated increase in generation.
All electrical works and goods installed or operated in Tanzania are required to comply with certain acceptable standards that EWURA has a responsibility to monitor. A catalogue of standards issued by TBS on electrical works is available (to view click here). Electrical energy, like any other products should satisfy proper quality requirements. For the electrical equipment to operate properly and for the customer to get the right quality of energy, the supply voltage should be within specified range of the rated value. TBS in collaboration with EWURA, TANESCO, University of Dar es Salaam and other stakeholders has established the Tanzania Standards on Power Quality of Supply and Services. The standards were launched in January, 2011(for more information click here). TANESCO prepared their own technical and operating guidelines known as the Engineering Instructions to facilitate standard construction and operation within the power system networks. These instructions are reviewed and approved by EWURA before coming into effect. The Engineering Instructions can be used by other entities dealing with distribution and supply activities.