Importance Of Adrc Based Lfc Of Interconnected Power System

It is observed that the power factor is maintained closer to unity when the input voltage is reduced from 230V to 110Vrms. Figure 11 (a) and (b) shows the power factor correction of controller for various load condition such as 20% (60W) and 75% (230W). The power factor for the system is found to be 0.84 for light load condition and 0.99 for full load condition. The THD of input current at full load with predominant third and fifth harmonic components are shown in Figure 12(a) and (b).Third harmonics is found to be 4.8% and fifth harmonic component is 4.9% which are well within IEC 61000-3-2 standard during wide range of load variations. The variation in power factor with load is shown graphically in Figure 13(a). It can be inferred from the graph that improved resettable control operates at high power factor for all load condition whereas the conventional PI control has poor power factor under light load conditions. Figure 13(b) shows the comparison between the efficiency of the converter for varying load conditions with the conventional control method and the resettable integrator control. The converter’s efficiency is maintained at 92% for light load conditions and 96% for fully loaded condition with integrator control technique. Thus the improved resettable integrator controller provides a very simple and reliable solution for power factor correction and

The transmission losses cannot be neglected particularly when long distance transmission of power is involved. While developing the ELD policy, transmission losses P_L are considered. Mathematically, the ELD optimization problem is defined as

The power system is installed within 5 electrical substations with emergency equipment, generators, medium voltage panels and transformers.This installation makes the power distribution to Petrobras Headquarters UOBS, which currently controls its offshore operation units (oil platform).The power system is divided into the following subsystems:

The parameters of this controller (PI- 1) can be decreased during the voltage sag in order to improve the performance of the proposed method.

In 1998, the North American Electric Reliability Corporation (NERC) Policy 1 - Generation Control and Performance Standard (CPS) - was enforced to ensure effective frequency control in interconnected power systems. In this policy, for example, it is required that each balancing authority shall achieve, as a minimum, CPS1 compliance of 100% (a measure of the correlation between a

To halt the drop in frequency, it is necessary to intentionally, and automatically disconnect a portion of the load equal to or greater than the generation deficiency in order to achieve balanced power economics while maintaining system stability. Automated load shedding systems are necessary for industrial power systems since sudden disturbances can plunge a system into a hazardous state much faster than an operator can react. These automated schemes must be designed and implemented to possess in-depth knowledge of system operating parameters and must rely on time sensitive

Reactive power compensation can be in a form of series type. In a power line at rated frequency, series compensation technique uses capacitors to decrease the equivalent reactance. The series capacitor generates reactive power to balance a fraction of line’s transfer reactance and this type of capacitor arrangement results improvement in the power transmission network. It increases the angular stability of the power system, improves the voltage stability of the corridor and also optimizes power sharing between parallel circuits [5]. Series compensation can be also implemented by using voltage or current source devices as shown in Figure A:

Load flow studies are implemented in power network system to determine and analyses the stable performance condition of electrical power network system and the related elements or components such as the flow of the reactive and real power, current of the brunches and voltage busbar under a defined load condition and specific generator. The solutions from the analysis are used to assess the loading of transformer or line and to assess the adequacy of the bus voltage also used to planning and operating propose in order to stablish strategy and prevent hypothetic situation that may occur on the system . In order to insure reliability in use of the electrical power distributed through transmission lines from the generation source, load flows are used as helpful tools to establish the steady state for the system.

This chapter explores the hardware setup of DFIG system. It also shows experimental results and the performance of this system under different types of controllers. The experimental work is divided into three parts. The first part is emulating the wind turbine characteristic using PMSM. The second part is implementing the GSC connected to the grid and maintaining its DC-link voltage constant under different disturbances. The final part is controlling the DFIG to extract power from the wind emulator and transfer it to the utility grid.

In the industrial sector the various motoring loads are continuously running and generating the inductive load. So the power factor in this system gets reduced due to the inductive reactive power. But the electricity board has a standard limits regarding the power factor values and if the power factor goes below the specified limit; the electricity company charges the penalty to the industrial consumers. The automatic power factor correction panel provides the required compensation to overcome the inductive reactance by using the power capacitors. The microcontroller PIC receives current signal from current transformer and simultaneously gives the signals to the various contactors to connect the capacitors in the line for the compensation. Thus by adding the capacitor to the line will compensate the reactive power and maintains the power factor near to unity. This will avoids the penalty to the industrial consumers and may get the incentives. In the conventional methods we were using the fixed capacitor for compensation. But these were leading to excessive charging of the capacitors causes the voltage surges. Thus it becomes difficult to main power factor near unity by on and off operation of fixed capacitor. The contactor switched capacitors are connected and disconnected automatically eliminating the previous problem.

Grid Tied RES Source Control Technique to mitigate harmonic and Reactive Power Compensation by using UPQC.

Abstract: The power quality (P.Q) arise mainly due to the PE equipment’s. In this paper presents the difference of simulation study of PI controlled based STATCON (STATCOM also called be STATCON) and shunt active power filter (SAPF). So, in order to improve the P.Q by sending or receiving the reactive power relay upon the necessity for load. And migrates the harmonics by injecting current into the scheme. So, that total harmonic distortion value of source current is decreased.

This section investigates the performance of the proposed control algorithm of DSTATCOM by means of computer simulations in MATLAB/Simulink environment. Tracking and harmonic decomposition capability of the proposed AANF are evaluated in this section, and the performance of the whole system for load balancing, the harmonic compensation, the neutral current compensation, and the power factor correction will be investigated in Section 5.

The power flow analysis involves the calculations of power flows and voltages of a transmission network for specified terminal or bus condition. Such calculations are required for the analysis of steady-state as well as dynamic performance of power systems [1].

Conventional PID controller is one of the most widely used controllers in industry, it have remained, by far; the most commonly used in practically all industrial feedback control applications. The main reason is its relatively simple structure, which can be easily understood and implemented in practice.