The transformers which connect the different voltage levels in transmission and distribution systems are supplied with on-load tap changing mechanism. The on-load tap changer maintains the voltage amplitude within the predefined limits at the so called regulation bus. In a radial feeder, the on-load tap changers are cascaded. Poor coordination between cascaded tap changers causes improper volta...

In the DG DemoNet Validation project a coordinated voltage controller was developed to actively integrate a high share of renewables into existing distribution systems. The impact of controlling the medium voltage transformer and the reactive power of distributed generation based on the actual voltages of critical nodes on voltage range and number of tap changer operations is analysed. Evaluati...

The growing interest in distributed generation (DG) in recent years has led to a number of generators connected to a distribution system. The integration of DGs in a distribution system has resulted in a network known as active distribution network due to the existence of bidirectional power flow in the system. Voltage rise issue is one of the predominantly important technical issues to be addr...

Improving the reactive power and voltage profile of a distribution substation is investigated in this paper. The purpose is to properly determination of the shunt capacitors on/off status and suitable tap changer (TC) position of a substation transformer. In addition, the limitation of secondary bus voltage, the maximum allowable number of switching operation in a day for on load tap changer an...

The work is devoted to the reduction of technogenic impact on environment from emissions heat power engineering by using a highly efficient equipment for complex purification exhaust gases — with regular pulsating plug (RPP). aim study physical and mathematical description mechanisms process capturing fine dust in an on-load tap changer. This goal achieved describing picture collection experime...

To support production activities, Perum Peruri requires a stable electricity supply. A tap changer is used to keep the output voltage on secondary side of transformer constant with value 20 kV, which installed 150 kV power transformer. The purpose this study was reduce movement OLTC stabilize at substation. data collection method literature obtain theoretical basis, as well using field studies ...

This paper presents a particle swarm optimization (PSO) for reactive power and voltage control (Volt/Var Control: VVC) in electric power systems considering voltage security. VVC can be formulated as a mixed-integer nonlinear optimization problem (MINLP). The proposed method expands the original PSO to handle a MINLP and determines an on-line VVC strategy with continuous and discrete control va...