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Early prediction of cascade events outages followed by immediate and proper control actions can prevent major blackouts. This paper introduces a novel method to predict cascade event outage at early stage and mitigate it with proper control strategy. In the first step, methodology employs sparsely located phasor measurement units to detect disturbances using electromechanical oscillation propagation...
This paper proposes an improved Cuckoo search algorithm to solve optimal power flow problems in electric power system. The proposed Self-learning Cuckoo search algorithm enhances the performance of Cuckoo eggs by employing the learner phase of Teaching-learning-based optimization. The learner phase leads Cuckoo eggs to follow better solutions. The proposed method has been applied for solving optimal...
A multi-step methodology is proposed in this paper to help prevent ice accretion on the power transmission lines exposed to severe ice and snowstorms. The goal is to use the heat gain due to resistive losses in the line to prevent ice from being formed. The proposed algorithm first attempts to re-dispatch the power generation units in such a way that it increases the flow of power through the at-risk...
Series FACTS devices are capable of relieving congestion and reducing generation costs in the power system. This paper proposes a planning model to optimally allocate TCSCs in the transmission network considering the base case and N − 1 contingencies. We consider a single target year and select three distinct load patterns to accommodate the yearly load profile. A reformulation technique is utilized...
In the current electricity market, the demand for power increases exponentially day by day. The ISO can boost the power sales by using “willingness to pay” approach on the consumers. This paper proposes a novel approach of scheduling power by incorporating willingness to pay of consumers into the load dispatch problem. The consumers with higher willingness to pay usually use appropriate capacity transmission...
This paper focuses on the preventive security constrained optimal power flow problems (PSCOPF), comparing full nonlinear AC models to linearized model. Generator participation factors (droop coefficients) are introduced to account for active power imbalance created by component outages under contingencies. Moreover, we propose a novel representation of network elements' electrical behavior, employing...
Power systems are prone to cascading outages leading to large-scale blackouts. Intentional controlled islanding (ICI) is an effective corrective control action that limits the consequences of these catastrophic events by splitting the system into smaller sustainable islands. This paper proposes an ICI algorithm based on an exact Mixed Integer Linear Programming Formulation (MILP) that directly determines...
In a deregulated electricity supply required method of determining the actual power flow on each line of the generator to load. This paper is a study to solved the problem of the utilization of transmission by using the distribution factor method. The main purpose of this paper is to provide a new scheme for determining the utilization of the transmission line. The proposed method was verified on...
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...
The price of electricity in the Mid-Atlantic (PJM) region of the United States increased during the “Polar Vortex” at the beginning of 2014. Transmission lines were congested because of high demand during the extreme cold weather. The natural gas price for electricity generation increased more than 35% at the end of 2013. Energy Storage Systems (ESS) would have helped the system to overcome many difficulties...
We present a model for finding the optimal investment strategy for installing TCSC devices on a transmission network while considering the wind generation and load uncertainties. The proposed TCSC location-allocation problem is a non-linear non-convex mathematical program. We use the general linearization technique to convexify the polynomial constraints. To address the uncertainty of wind power and...
Power system contingency screening is aimed at detecting potential threats, such as tripped transmission lines, to support secure operation of power systems. The growing penetration of intermittent-renewable resources into the power system challenges the traditional paradigm of contingency screening. One particular concern is that different renewable-generation profiles may lead to changing severe...
Electricity price volatility has been a significant concern for several market participants, including suppliers and load-serving entities, because risks imposed by price volatility increase uncertainty in their revenues. A large penetration of variable wind and solar generation is expected to further amplify price fluctuations. To reduce electricity price volatility, we propose a stochastic optimal...
Splitting control is regarded as the last defensive line of emergency control in power system to isolate the asynchronous generator groups. Traditional splitting control method, mainly based on principles of relay protection, is a kind of passive, component-level, local, control strategy. In contrast, active splitting control is proposed to realize coordination of decentralized operation of splitting...
Active splitting is an efficient emergency control strategy when severe disturbance occurs and several asynchronous generator groups appears in the power system. Active splitting strategy searching is a NP-hard problem since the strategy space is so large. However, the original strategy space is highly redundant, making most calculation useless. In this paper, a novel method for splitting strategy...
From time to time a sequence of unexpected and often overlapping contingencies may lead to power system angular instability and even blackouts if not addressed adequately by means of an out-of-step protection system. This paper proposes the out-of-step protection system structure, which is based on generation sources electromotive forces vectors angle control. The protection system consists of several...
A two-stage stochastic optimization problem is proposed in order to model a day-ahead market in which energy, as well as active and reactive power reserves are jointly scheduled, in the presence of significant uncertain wind power production. In addition, a second order conic programming based AC power flow formulation is used, in order to take into account the active and reactive power losses while...
A GW ultra-wideband microwave radiation source is designed and developed. It consists of an ultra-fast 16-stage Marx generator filled with N2 gas at pressure up to 15atm, a 50Ω 1.6ns coaxial pulse forming line, a peaking switch and an annular converter switch. The last three units are housed in the same coaxial transmission line filled with high-pressure N2 gas up to 120atm. The system can operated...
In deregulated power system, assessment and analysis of wheeling prices become a challenging task. In Indian power sector various network users are based on a regional postage stamp method for wheeling prices. But due to changed scenario, postage stamp method does not satisfy Indian electricity policy. It is because of non linear power flow plays an important role to decide wheeling prices across...
This paper presents a simple algorithm for calculation of simultaneous faults.i.e. Series and parallel faults in power system. The objective of this paper is fault calculation which provides current at fault locations as well as the current through each branch and voltage at each bus; this helps to design a good protective scheme which gives compressive and pragmatic fault analysis. The most important...
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