ancillary service details: voltage control
... Real power can be delivered over much greater distances so the supplying resources are not as location constrained, whereas reactive resources must be distributed throughout the power system. ...
... Real power can be delivered over much greater distances so the supplying resources are not as location constrained, whereas reactive resources must be distributed throughout the power system. ...
INTRODUCTION - AEP has a long tradition of technical excellence
... acceptable substation service alternatives would be to feed the substation service transformers via the tertiary winding of an autotransformer or connect power PTs to the bus. Distribution lines should not be used as the primary AC source because of reliability concerns, but can be used as a back-up ...
... acceptable substation service alternatives would be to feed the substation service transformers via the tertiary winding of an autotransformer or connect power PTs to the bus. Distribution lines should not be used as the primary AC source because of reliability concerns, but can be used as a back-up ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... results have been provided for a variety of operating conditions such as, changes in short circuit ratio, converter parametric changes, and faults on the converter and inverter buses. A detailed discussion on tuning techniques of converter controllers for VSC-HVDC is carried out in [8], by using Mod ...
... results have been provided for a variety of operating conditions such as, changes in short circuit ratio, converter parametric changes, and faults on the converter and inverter buses. A detailed discussion on tuning techniques of converter controllers for VSC-HVDC is carried out in [8], by using Mod ...
Optimal placement of shunt connected facts device in a series long
... attention in the last 2 decades. It uses high current power electronic devices to control the voltage, power flow, stability, etc. of a transmission system. FACTS technologies can essentially be defined as highly engineered power-electronics-based systems, integrating the control and operation of ad ...
... attention in the last 2 decades. It uses high current power electronic devices to control the voltage, power flow, stability, etc. of a transmission system. FACTS technologies can essentially be defined as highly engineered power-electronics-based systems, integrating the control and operation of ad ...
- National Grid
... output shall be restored to at least 90% of the level available immediately before the fault. Once the Active Power output has been restored to the required level, Active Power oscillations shall be acceptable provided that:-the total Active Energy delivered during the period of the oscillations is ...
... output shall be restored to at least 90% of the level available immediately before the fault. Once the Active Power output has been restored to the required level, Active Power oscillations shall be acceptable provided that:-the total Active Energy delivered during the period of the oscillations is ...
PowerWorld Transmission Line Parameter Calculator
... The following automation server is useful for take advantage of the TransLineCalc functionality from an external application. Note that we also have included a script command in Simulator that is designed to run TransLineCalc and compute the characteristics parameters of a set of transmission lines, ...
... The following automation server is useful for take advantage of the TransLineCalc functionality from an external application. Note that we also have included a script command in Simulator that is designed to run TransLineCalc and compute the characteristics parameters of a set of transmission lines, ...
Electric power transmission
Electric power transmission is the bulk transfer of electrical energy, from generating power plants to electrical substations located near demand centers. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. Transmission lines, when interconnected with each other, become transmission networks. The combined transmission and distribution network is known as the ""power grid"" in North America, or just ""the grid"". In the United Kingdom, the network is known as the ""National Grid"".A wide area synchronous grid, also known as an ""interconnection"" in North America, directly connects a large number of generators delivering AC power with the same relative frequency, to a large number of consumers. For example, there are four major interconnections in North America (the Western Interconnection, the Eastern Interconnection, the Quebec Interconnection and the Electric Reliability Council of Texas (ERCOT) grid), and one large grid for most of continental Europe.The same relative frequency, but almost never the same relative phase as ac power interchange is a function of the phase difference between any two nodes in the network, and zero degrees difference means no power is interchanged; any phase difference up to 90 degrees is stable by the ""equal area criteria""; any phase difference above 90 degrees is absolutely unstable; the interchange partners are responsible for maintaining frequency as close to the utility frequency as is practical, and the phase differences between any two nodes significantly less than 90 degrees; should 90 degrees be exceeded, a system separation is executed, and remains separated until the trouble has been corrected.Historically, transmission and distribution lines were owned by the same company, but starting in the 1990s, many countries have liberalized the regulation of the electricity market in ways that have led to the separation of the electricity transmission business from the distribution business.