Security-Based Active Demand Response Strategy Considering Uncertainties in Power Systems

Han, Haiteng; Gao, Shan; Shi, Qingxin; Cui, Hantao; Li, Fangxing

doi:10.1109/access.2017.2743076

Cited by 17 publications

(9 citation statements)

References 18 publications

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“…The system frequency response (SFR) model has been commonly used to represent the frequency dynamics of a power system [35,36]. The model can make use of re-heated turbines or non-reheated turbines.…”

Section: Power System Dynamic Modellingmentioning

confidence: 99%

WAMS-Based Online Disturbance Estimation in Interconnected Power Systems Using Disturbance Observer

et al. 2019

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In the event of a generator loss or disturbance, the power system frequency declines quickly and overall system stability is at risk. During these scenarios, under frequency load shedding is triggered to restore the power system frequency. The main stage of modern adaptive under frequency load shedding techniques is disturbance estimation. However, the swing equation is widely used in disturbance estimation but has some critical estimation errors. In this paper, instead of using the swing equation we proposed the use of a disturbance observer to estimate the curtailed power. By making use of wide area measurements, a system frequency response model, which is a representative of the whole power system, can be realized in real time. Using different power system states of the developed model, a disturbance observer can be designed as well. The main advantage of the disturbance observer is that it can accurately estimate the disturbance magnitude and its location in a very short time. Further investigations show that by using the disturbance observer disturbances, which occur at the same time or at different times in different areas regardless of the magnitude or size, accurate estimations can be made. To ascertain the efficiency of the proposed scheme, simulations are done for a four-area power system using Matlab/Simulink.

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Section: Power System Dynamic Modellingmentioning

confidence: 99%

WAMS-Based Online Disturbance Estimation in Interconnected Power Systems Using Disturbance Observer

et al. 2019

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“…Interconnected power systems consist of several generating units connected to loads by an electric grid. Practically, to reduce the calculation burden and simplify the complexity of interconnected power system models, it is better to equivalent the different generation units on a single aggregated unit [35,36]. To this end, the equivalent quantities can be determined based on 4, and dynamic behavior of the aggregated system is represented by (5) as follows…”

Section: Frequency Model Set Upmentioning

confidence: 99%

“…In last decade, many models with different orders are suggested for governor-turbine systems. However, it has been proven in [35][36][37] that the frequency response model based on the swing equation dynamics is sufficient for frequency studies. The dynamics of these important components are represented as their transfer functions as shown in Figure 1.…”

Section: Frequency Model Set Upmentioning

confidence: 99%

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

et al. 2019

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Power systems that are known as the most complex systems encounter different types of disturbances and emergence events. To operate such systems in a stable mode, several control protection techniques are in need. Frequency plays a vital role in power systems and needs to be properly maintained in a permissible level. To this end, under-frequency load-shedding (UFLS) techniques are used to intercept the frequency decline when a system encounters a severe disturbance. In this paper, a novel, wide-area measurement system (WAMS)-based optimal UFLS technique is proposed. The system frequency response (SFR) model is identified online based on the real-time measurements collected by phasor measurement units (PMUs). Then, the SFR model is used to design a new optimal multi-stage UFLS scheme. Imperialist competitive algorithm (ICA), which is a powerful evolutionary computing method, is then adopted for solving the suggested multi-stage UFLS optimization problem. The applicability of the proposed method is shown on a practical test system. The effectiveness of the proposed optimal multi-stage UFLS scheme is verified by several simulation and comparison scenarios.

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“…The demand response (DR) has been widely studied to help integrate RES [4]- [8]. Its applications include, but are not limited to, frequency regulation, ramping or following reserves, additional unit commitment, and load reshaping or shifting [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Evaluating and Increasing the Renewable Energy Share of Customers’ Electricity Consumption

Fan

et al. 2019

IEEE Access

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Demand response (DR) is a critical enabler for promoting the integration of significant renewable energy sources (RES) into power systems. However, the contribution of each customer to the amount of integrated RES in the entire system cannot be quantified based on current studies, which hinders the deployment and promotion of DR programs. To address this problem, an index to quantitatively evaluate the marginal impact on the amount of integrated RES in the whole system caused by a customer (MIR) was proposed in this paper. The MIR proved to be reasonable for the evaluation of the renewable energy share of a customer's electricity consumption (RSC). We subsequently proposed an RSC-based DR scheme, in which customers are motivated to individually reshape their load profiles to obtain a higher RSC, which accordingly facilitates integrating RES in the whole system. Optimal load reshaping strategies were derived from a bilevel optimization model, which was converted into a mathematical program with primal and dual constraints (MPPDC). The test system was generated based on the load data from Open Energy Information and RES data from the PJM. We corroborated the RSC evaluation result analytically and numerically. Further tests on the RSC-based DR scheme showed it could help facilitate integrating considerably more RES into the power system.

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Security-Based Active Demand Response Strategy Considering Uncertainties in Power Systems

Cited by 17 publications

References 18 publications

WAMS-Based Online Disturbance Estimation in Interconnected Power Systems Using Disturbance Observer

WAMS-Based Online Disturbance Estimation in Interconnected Power Systems Using Disturbance Observer

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

Evaluating and Increasing the Renewable Energy Share of Customers’ Electricity Consumption

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