Reactive power control

Part 2 book "Electric power engineering handbook" includes content: Reactive power compensation, environmental impact of transmission lines, power system loads, distribution system modeling and analysis, power system operation and control, hard to find information (on distribution system characteristics and protection), real time control of distributed generation,... and other contents.

238p dianmotminh01 20-05-2024 5 3   Download

Part 1 book "Thyristor-based facts controllers for electrical transmission systems" includes content: Introduction, reactive power control in electrical power transmission systems, principles of conventional reactive power compensators, SVC control components and models, concepts of SVC voltage control

236p dianmotminh00 22-04-2024 4 3   Download

Part 1 book "Electric power systems" includes content: Introduction, basic concepts, components of a power system, control of power and frequency, control of voltage and reactive power, load flows.

256p muasambanhan09 12-03-2024 3 1   Download

The active and reactive power, P and Q, are important variables when dividing the load for parallel connected inverters using a droop controller. P and Q are calculated based on the transformer output voltage value and the load current.

15p viengels 25-08-2023 5 4   Download

In Part I of this paper, we optimized the CANDU-6 adjuster rods for reactors burning thorium-based fuel. Here we modify the liquid zone controllers assuming optimized adjuster rods for the same advanced cycles. The objective is to maximize the average exit burnup for these fuel cycles while preserving the reactor ability to control the power distribution inside the core during normal operation conditions.

11p vironald 15-12-2022 9 3   Download

This paper introduces the active and reactive power control of voltage source converter (VSC) station. The direct current control using a double closed-loop control structure has been implemented at the terminal of the VSC.

4p vistephenhawking 26-04-2022 11 2   Download

Lecture Methods of Electric power systems analysis - Lesson 10: Advanced power flow, sensitivity provide students with knowledge about circulating reactive power; LTC tap coordination; auto detection of circulating reactive or real power; coordinated reactive control; phase-shifting transformers; phase-shifter model; integrated phase-shifter control;...

67p hanthienngao 15-04-2022 17 1   Download

Lecture Power system operation and control - Lesson 11: Power flow provide students with knowledge about real power balance equations; Newton-Raphson power flow; power flow variables; N-R power flow solution; power flow Jacobian matrix; two bus case low voltage solution; two bus region of convergence; generator reactive power limits;...

29p hanthienngao 15-04-2022 10 1   Download

For a robust voltage control of the system, controllers of proportional and integral type have been incorporated for AVR of the excitation system of the synchronous generator and SVC. The controller parameters are optimized using firefly algorithm (FA). The dynamic response of the system has been tested for different degrees of load disturbances plus variable nature of the wind system.

13p phanngocminhtam 14-09-2021 9 1   Download

This paper illustrates the scheme of integrating of photo-voltaic (PV) system as distributed generation to micro-grid. PV system is integrated to grid with three-level inverter and five-level cascaded H-Bridge inverter to invert the type of supply synchronized to grid. Inverter will be controlled with simple current control strategy. Results were presented for the proposed work considering cases like DG sending only active power and DG injecting both active and reactive power through three-level and five-level inverter topologies.

13p phanngocminhtam 14-09-2021 10 1   Download

n recent years, renewable energy sources have greatly affected the structure and operation of power systems. Previously, grid-connected PV generators using inverters were only allowed to generate active power to ensure the utilities to adjust the voltage in the distribution grid. It is no longer optimal for system power transmission and system stability, especially when solar power sources with a capacity of hundreds of MWs having a role in regulating grid voltage. Accordingly, this paper proposes a smart inverter model of a gridconnected PV system that can regulate the reactive power.

5p kequaidan11 13-04-2021 13 2   Download

We present in this paper a control method of a novel hybrid parallel active power filter (HPAPF) used for harmonic currents elimination and reactive power compensation in the power system for threephase variable frequency drives (VFDs). The HPAPF configuration is built from two basically filter components including harmonics tuned passive filter and active power electronics filter.

11p vioregon2711 22-02-2021 16 3   Download

This paper proposes a distributed device that could compensate reactive power by centralized control. This device only manipulates a controller for a capacitor system and loads. The controller collects the data of current, voltage, and power in each of the load branches in order to adjust total reactive power in priority sequence.

13p vidoha2711 10-09-2020 8 1   Download

Active Power Filter (APF) is capable of changing the size and frequency of harmonics as well as changes in reactive power compensation. It is important to control the stability of the DC-link capacitor voltage stability for it. For DC voltage controls of APF, there are two important achievements.

15p vivalletta2711 11-01-2020 19 1   Download

For resolving the problem that power filter cannot work normally because TCR (thyristor controlled reactor) generates extra third harmonic current under asymmetrical voltage, the paper proposes the estimation method of current capacity that TCR generates extra third harmonic current under asymmetrical voltage.

9p vivalletta2711 11-01-2020 12 2   Download

In order to optimize the electric energy quality of HVDC access point, a modular multilevel selective harmonic elimination pulse-width modulation (MSHE-PWM) method is proposed. On the basis of keeping the minimum action frequency of the power device, MSHE-PWM method can meet the requirement for accurately eliminating low-order harmonics in the output PWM waveform.

7p vivalletta2711 11-01-2020 9 0   Download

In the paper, the influence of harmonic was taken into consideration during the realization of the AVC system in the power grid of Wuhu region, relevant study and development were conducted from the perspective of application and practice, and concrete proposal of practicable reactive voltage power optimization was put forward.

9p vivalletta2711 11-01-2020 8 0   Download

In this paper, three types of operational and industrial absorbers used at research reactors, including Ag-In-Cd alloy, B4C, and Hf are selected for sensitivity analyses. Their integral effects on the main neutronic core parameters important to safety issues are investigated. These parameters are core excess reactivity, shutdown margin, total reactivity worth of control rods, thermal neutron flux, power density distribution, and Power Peaking Factor (PPF). The IAEA 10 MW benchmark core is selected as the case study to verify calculations.

8p minhxaminhyeu5 30-06-2019 22 0   Download

In particular, CANDU reactors have always taken advantage of the small value of the PCR associated with their design characteristics, such that the overall design and safety characteristics of the reactor are not sensitive to the value of the PCR. For other reactor design concepts a PCR which is both large and negative is an important aspect in the design of their engineered systems for controlling reactivity.

8p minhxaminhyeu5 30-06-2019 7 0   Download

This research also introduces a supplementary reactivity control mechanism using stainless steel as mechanical shim (MS) rod to obtain the criticality during normal operation. A further analysis is performed to investigate the local power peaking of the CSBA-loaded FA at MS-rodded condition. Moreover, a simple B4C-based control rod arrangement is proposed to assure a sufficient shutdown margin even at the cold-zero-power condition.

8p minhxaminhyeu3 12-06-2019 9 1   Download