ISSN 1 746-7233, England, UK World Journal of Modelling and Simulation Vol. 5 (2009) No. 4, pp. 243-251 Effect of PV embedded generation on the radial distribution network Satish Kumar Injeti 1* , N. Prema Kumar 2 1 Department of E. E. E, Sir C R Reddy College of Engineering, Eluru, A. P, 534007, India 2 Department of E. E. E, A. U College of Engineering, Andhra University, Vizag, A. P, 530003, India (Received December 14 2008, Accepted August 10 2009) Abstract. Power distribution system in the country is characterized by high power losses, poor reliability of supply, frequent equipment burnouts etc. The traditional approach in electric power generation is to have centralized plants distributing electricity through an extensive transmission & distribution network. Distri- bution generation (dg) provides electric power at a site closer to the customer, eliminating the unnecessary transmission and distribution costs. This paper described a study of several control strategies associated with the design of active distribution network intended to increase the level of penetration of embedded generation (eg) in distribution networks. By allowing the embedded generator to take part in voltage regulation, larger capacities of embedded generation to be accommodated in the existing distribution network. The load flow study of radial distribution with embedded generation has been carried out. The results being verified by using both PSB and MATLAB code also. Keywords: distribution generation, PV, embedded generation 1 Introduction The direction of power flow in the distribution networks was almost always from higher to the lower voltage levels. This system architecture was a technical and economic choice, and with a new technology and changed economic and commercial environment, the power system is now beginning to be modified by the reintroduction of generation connected the distribution networks. The renewed interest in embedded generation has been simulated by a number of technical and environmental factors looking further in to the future, the increased use of fuel cells using skirling engines and photovoltaic devices integrated in to the fabric of buildings may all be anticipated as possible sources of power for embedded generation (N. Jenkins, ‘Embedded generation’, IEE) [15] . Embedded generation is electricity generation which is connected to the Distribution network rather than to the high voltage National Grid. Embedded generation is typically smaller generation such as Combined Heat and Power (CHP) or renewable generation: small hydro, wind or solar power. 2 Connection of embedded generator to the distribution network The introduction of embedded generation presents a new set of conditions to networks both with respect to the direction of real and reactive power flows, but also with the quantity of power needed to be transported. Modern distribution systems were designed to accept bulk power at the grid supply points and to distribute it to customers. Thus the flow of both real power (P) and reactive power (Q) was always from the higher to the lower voltage levels. With the significant penetration of embedded generation the power flow may become reversed and the distribution network is no longer a passive circuit supplying loads but an active system with * Corresponding author. E-mail address: satish injeti@yahoo.com. Published by World Academic Press, World Academic Union