![]() What is Voltage Regulation in these Lines? The line that carries current has a voltage drop across the length of the transmission line. The formula for the same is: % Transmission Efficiency η = PRx100 / Ps % Voltage Regulation It is defined as the ratio of receiving end power (PR) to the sending end power (PS), expressed in percentage. Let’s focus on what exactly is Transmission Efficiency. The energy is lost in the form of heat in the conductors. This happens because of the Joule effect found in power lines. But this does not happen, the delivered power is always lower than expected, resulting in losses in a transformer. Ideally, power generated should be delivered at the substations or consumer end in the same amount. Let’s understand the Efficiency of Transmission Lines. The performance of such a line is calculated by considering the line constants (which are Resistance, Inductance, Conductance & Capacitance). Here, the length of the line is more than 250 km and the operational voltage is very high, more than 133 kV. The capacitance effects are present in the case of medium-length lines, due to the sufficient length and voltage of the line. ![]() In a medium transmission line, the length of the line is more than 80km, and the line voltage is approximately 69kV to 133kV. If the reactance releases energy in the form of a magnetic field, it is called inductive reactance, whereas if the reactance releases energy in the form of an electric field, it is called capacitive reactance. Note – Capacitance is the capability of a material object or device to store electric charge. Therefore, the regulation of short transmission lines depends only on resistance and inductive reactance. ![]() Hence the capacitance effects of the line are extremely small and thus neglected. Here, the length of the line is below 80 km, and the line voltage is comparatively low (below 69 kV). In the context of transmission lines, conductance refers to the ability of the transmission line to conduct electrical current. This capacitance can affect the flow of electrical current in the line by storing and releasing electrical charge and thus help regulate the flow of current and maintain a stable voltage in the transmission line.Ĥ) Conductance: It is a measure of the ease with which electrical current can flow through a material or device. The capacitance of the transmission line is determined by the size and spacing of the conductors, as well as the properties of the insulating material – that is air. The line consists of two conductors separated by an insulating material, such as air. Inductance is a measure of the resistance of a conductor to changes in the current flowing through it.ģ) Capacitance: Capacitance refers to the ability of the transmission line to store electrical charge. Thus, the conductor exhibits a property called inductance. This flux links the conductor, meaning it creates a magnetic connection between the conductor and the surrounding field. This field is known as a changing flux because it is constantly changing as the current alternates. However, the performance of a transmission line can be analysed conveniently if distributed resistance is considered as lumped as shown in the diagram on the right.Ģ) Inductance: When an alternating current flows through a conductor, it produces an electromagnetic field around the conductor. The resistance is distributed uniformly along the whole length of the line as shown in the diagram on the left. Conductance (G) of the transmission line.ġ) Resistance: It is the opposition to the flow of electric current in a conductor, measured in ohms.The performance of the transmission line depends on 4 basic parameters of the line which help calculate the line voltage regulation: from the sending end to the receiving end. Voltage regulation is a measure of (losses in a transformer) how much voltage changes along the length of the transmission line i.e. They are used to transmit electrical power from a power source to a load, such as the power generation station to the substations and the consumer end. Transmission lines are designed to carry high-voltage electricity, typically in the range of several hundred thousand volts to tens of thousands of volts. In this blog, we will explore how they do this through Transmission Line Voltage Regulation, let’s start with the basic definitions. Hence, Electric Companies are trying to minimise losses in a transformer. ![]() If you look at Data from the World Bank, the average Electric power transmission and distribution losses for the World was 8% in 2014. Did you know that 19% of Electricity generated in India is lost while transmitting from the generation plant to the end customer.
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