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A new brushless doubly-fed double stator double rotor (DSDR) generator based on permanent magnet field modulation for the wind power application is proposed in this paper. This generator adopted double stator to achieve the decoupling of the control winding and power winding. To improve the power density, a freely rotating rotor is introduced. To achieve the variable-speed constant-frequency operation...
This paper investigates the modeling, simulation and implementation of sensorless maximum power point tracking (MPPT) of permanent magnet synchronous generator wind power system. A comprehensive portfolio of control schemes are discussed and verified by simulations and experiments. Particularly, a PMSG-based wind power emulation system has been developed based on two machine drive setups — one is...
In this study, U-model based control system design methodology is expanded into application of wind energy conversion systems, which includes formulisation of system into a standard control oriented model and reformulation of the power maximization control problem into a tracking control design for such nonlinear dynamic systems. In addition, the designed closed-loop system having pre-designed linear...
Wind energy, as an important part of the new energy, is a power generation of the most mature technology, the most commercial development conditions and broad prospects in the new energy fields. As an important part of the wind turbine, therefore its control system has also been full attention of the world, and it has become a hot topic. Wind turbine control system has become a major problem if wind...
Energy storage has been discussed in the electricity industry for many years. Today, energy storage enjoys a growing sense of promise, as many expect it will become a viable part of the electric system over the next decade. However, there are still very real challenges to the cost-effective deployment of storage solutions. The work described in this paper highlights the advantages of techno-economical...
The intermittent and uncertainty nature of variable resources rises the need to investigate the effect of the technical operation aspects of power system operation and transmission lines constrains, on estimating the penetration level of variable resources that enhances the economic and operation aspects of power system. The Incorporation of these resources into systems rises the need to evaluate...
In the future, state-of-the-art wind generators (WGs) are expected to produce one of the largest amounts of renewable energy worldwide. Nowadays, wind DFIGs with integrated storage are regarded as the state-of-the-art WGs. In this paper, we propose a comprehensive methodology that aims to solve the problem of distributed coordination and control of state-of-the-art WGs. The goal is for a WF to generate...
The integration of wind power into power systems has been gaining momentum in the global energy industry due to its environmental benefits and abundance of supply. However, the natural intermittent and non-dispatchable features of wind negatively impact the system's frequency regulation capability. Wind power not only injects additional fluctuations to the already variable nature of frequency deviation,...
Spinning reserve (SR) allocation problem is of vital importance in maintaining power systems security and reliability. Considering forecast uncertainties, unit commitment problem and contingencies on the failure of transmission lines, a general probabilistic model for expected total cost is established and its corresponding solution for optimal SR allocation strategy is proposed. The objective function...
An increased use of variable generation technologies (VGTs) such as wind power and photovoltaic (PV) generation can have important effects in system frequency performance during both, normal operation as well as major power imbalances. This has led to new challenges for Transmission System Operators (TSOs), especially regarding the amount and kind of operating reserves to impose in the Unit Commitment...
Integration of wind power generation is increasing rapidly worldwide, hence bringing more challenges to the safe operation of the power system. In this paper, the basic construction method of dynamic security region (DSR) boundary is introduced. A model is established based on DSR, whose object is the minimization of controlling cost in dispatching operations. The coordinated control strategy based...
Efficient utilization of large-scale wind power is crucial to make the power industry economical and environment friendly. One way to consume wind power is through constructing isolated power systems with wind power supplying high energy consumption industries directly. However, one key issue, which limits the isolated power system for industry-wide application is to maintain the system frequency...
This paper proposes a sliding mode controller for a permanent-magnet synchronous generator wind turbine system to satisfy low voltage ride through requirement. The generator-side converter regulates the DC link voltage instead of grid-side converter. The generator-side controller is designed using the sliding mode control considering the nonlinear relationship between the generator power and the dc-link...
Three types of offshore wind power collection topologies are studied for DC power systems in this paper. Permanent Magnet Synchronous Generator (PMSG) based Wind Energy Conversion System (WECS) is considered and the Optimal Power Control (OPC) is used for the Maximum Power Point Track (MPPT) control. The failure of a wind power unit is regarded as the fault condition in this paper. Voltage control...
The dynamics governing power systems are being modified by the continued increase in the installation of wind turbine-generators (WTGs). This paper presents a small-signal analysis on the impact of the power electronic interface of large quantities of wind generation have on the inter-area oscillation of a two-area system. In particular the sensitivity of this inter-area mode with respect to: (i)...
The Revenue Sufficiency Guarantee (RSG), as part of make-whole (or uplift) payments in electricity markets, is designed to recover the generation resources' offer-based production costs that are not otherwise covered by their market revenues. Increased penetrations of wind power will bring significant impacts to the RSG payments in the markets. However, literature related to this topic is sparse....
Power system stability has been a fundamental topic in power engineering area. Recently, with the growth of load demand and the utilization of renewable energy, the preventive control of power system transient stability becomes more challenging. Following the trend of applying intelligent approaches to solve stability problems, this paper proposes a decision tree (DT)-based online preventive control...
We present a computationally efficient mixed-integer program (MIP) that determines optimal generator expansion decisions, as well as periodic unit commitment and dispatch. The model is applied to analyze the impact of increasing wind power capacity on the optimal generation mix and the profitability of thermal generators. In a case study, we find that increasing wind penetration reduces energy prices...
With higher shares of fluctuating electricity generation from renewables, new operational planning methods to handle uncertainty from forecast errors and short-term fluctuations are required. In this paper, we formulate a probabilistic AC optimal power flow where the uncertainties are accounted for using chance constraints on line currents and voltage magnitudes. The chance constraints ensure that...
This paper solves an optimal power flow problem to minimize the emission due to carbon oxides, nitrogen oxides and sulfur oxides with cost as a constraint for a wind-thermal power system. Wind energy can reach significant penetration in modern power system and the wind power will introduce additional uncertainties. Market price is mainly influenced by the generating fuel cost, as the wind power being...
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