Li Cuiping et al. used a battery energy storage system to assist in the frequency modulation of thermal power units, significantly improving the frequency modulation effect, smoothing the unit output power and reducing unit wear.
The dynamic frequency modulation model of the whole regional power grid is composed of thermal power units, energy storage systems, nonlinear frequency difference signal decomposition, fire-storage cooperative fuzzy control power distribution, energy storage system output control and other components. Fig. 1.
Under the four control strategies of A, B, C and D, the hybrid energy storage participating in the primary frequency modulation of the unit |Δ fm | is 0.00194 p.u.Hz, excluding the energy storage system when the frequency modulation |Δ fm | is 0.00316 p.u.Hz, compared to a decrease of 37.61 %.
The frequency modulation of thermal power unit has disadvantages such as long response time and slow climbing speed. Battery energy storage has gradually become a research hotspot in power system frequency modulation due to its quick response and flexible regulation.
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All the above studies are single energy storage-assisted thermal power units participating in frequency modulation, for actual thermal power units, the use of a single …
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The frequency modulation capability of an electric energy storage system depends on the equivalent frequency modulation coefficient of the system, and the magnitude of the …
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Firstly, the overall modeling process of stored energy is described. Secondly, in order to better simulate the change of power frequency response characteristics of stored energy with State …
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In recent years,electrochemical energy storage has been widely used in the field of power grid auxiliary frequency modulation because of its advantages,such as rapid action and flexible …
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Frequency-domain displays show a parameter (again, usually amplitude) versus frequency. A spectrum analyzer takes an analog input signal—a time-domain signal—and …
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This paper mainly studies the traditional thermal power primary frequency modulation and lithium-ion battery energy storage, applies lithium-ion battery energy storage …
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To mitigate the system frequency fluctuations induced by the integration of a large amount of renewable energy sources into the grid, a novel ESS participation strategy for …
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This paper analyzes the characteristics of energy storage participation in frequency modulation, and introduces method and control strategy of energy storage access to thermal power units.
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This paper aims to meet the challenges of large-scale access to renewable energy and increasingly complex power grid structure, and deeply discusses the application value of …
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This paper aims to meet the challenges of large-scale access to renewable energy and increasingly complex power grid structure, and …
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As more and more unconventional energy sources are being applied in the field of power generation, the frequency fluctuation of power system becomes more and more serious. …
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The experimental results show that the frequency modulation control takes only 8.2 seconds, and the accuracy of frequency modulation control can reach 99.90%, indicating …
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