1. Introduction With a low-carbon background, a significant increase in the proportion of renewable energy (RE) increases the uncertainty of power systems [1, 2], and the gradual retirement of thermal power units exacerbates the lack of flexible resources [3], leading to a sharp increase in the pressure on the system peak and frequency regulation …
In addition, the demand response can effectively reduce the peak–valley difference in the system net load, peak load pressure, and energy storage of the thermal power units. By comparing the output of the thermal power units in Figure 5, we can see that in Case 4, the thermal power unit output fluctuation is smaller and the operating cost …
Energy storage configured in thermal power plants is mainly used to participate in peak and frequency regulation, which can not only make profits, but also alleviate the excessive coal consumption and serious equipment wear in power generation process [17, 18].
Peak load management can help utilities defer or avoid expensive generation, transmission, and distribution system upgrades. 2 "Recovery Act Case Study: Combined Heat and Power System Enables 100% Reliability at Leading Medical Campus," U.S. Department of Energy, 2013.
As much wind power is connected to the power system, the accommodation of the wind power in the power grids becomes a huge challenge to the operation model of China''s power system. Releasing and improving the flexibility of the power system will be necessary and important to enable the accommodation of power …
The transition to renewable energy production is imperative for achieving the low-carbon goal. However, the current lack of peak shaving capacity and poor flexibility of coal-fired units hinders the large-scale consumption of …
Energy storage can be used to shift the peak generation from the PV system to be used when the demand requires it, as shown in Figure 3. Excess energy can be stored during peak PV generation. This allows for the distribution of this energy when the PV system is not generating adequate power, or not generating at all.
Peak-regulation refers to the planned regulation of generation to follow the load variation pattern either in peak load or valley load periods. Sufficient peak-regulation capability is necessary for the reliable and secure operation of power grid, especially in urban regions with extremely large peak–valley load difference ( Jin et al., …
Energy storage (ES) can mitigate the pressure of peak shaving and frequency regulation in power systems with high penetration of renewable energy (RE) caused by uncertainty and inflexibility. However, the demand for ES capacity to enhance the peak shaving and frequency regulation capability of power systems with high …
With the development of smart grid and low-carbon electricity, a high proportion of renewable energy is connected to the grid. In addition, the peak-valley difference of system load increases, which makes the traditional grid scheduling method no longer suitable. Therefore, this paper proposes a two-stage low-carbon economic scheduling model …
Solar thermal power generation technology is an environment-friendly power generation technology that can make full use of solar energy. The power generating model and economical model of the concentrating solar power (CSP) station are established in this paper. The reliability of the power generation system is calculated based on the …
At present, wind power accounts for about 20% of the total installed capacity in Northeast China, and the peak shaving characteristic is obvious. Taking a condensing thermal power unit as an example, the price of compensatory peak shaving is shown in Table 1.
First, the mechanism and cost of deep peak regulation of thermal power units are deeply analyzed, ... interruptible load and the energy storage system in DR, an intra-day scheduling model is then ...
Grid-level large-scale electrical energy storage (GLEES) is an essential approach for balancing the supply–demand of electricity generation, distribution, and usage. Compared with conventional energy storage methods, battery technologies are desirable energy storage devices for GLEES due to their easy modularization, rapid response, …
Concentrating solar power (CSP) is a new form of solar power generation, and it has schedulability because it contains heat storage device. The capacity of the heat storage affects the operating characteristics of the CSP directly, and configuring the thermal storage capacity of CSP properly can achieve the best controllability and economical efficiency. In …
Maintaining frequency stability is a prerequisite to ensure safe and reliable operation of the power grid. Based on the purpose of improving the frequency regulation performance of the power grid and efficiently utilizing the frequency regulation resources, a improved particle swarm optimization-based thermal power-energy storage combined automatic power …
On this basis, we propose a flexibility enhancement method coordinating battery energy storage capacity optimization and deep peak regulation of thermal generators, which aims at minimizing the total investment and operation costs while …
In multi-energy complementary power generation systems, the complete consumption of wind and photovoltaic resources often requires more costs, and tolerable energy abandonment can bring about the more reasonable optimization of operation schemes. This paper presents a scheduling model for a combined power generation …
RESEARCH ON DAY-AHEAD OPTIMAL DISPATCHING OF HIGH-PROPORTION RENEWABLE ENERGY POWER SYSTEM CONSIDERING DEEP PEAK LOAD REGULATION OF THERMAL POWER November 2023 DOI: 10.19912/j.0254-0096.tynxb.2021 ...
Concentrating solar power (CSP) generation provides a new way to exploit solar energy. Its thermal energy storage (TES) can improve the output flexibility of CSP greatly and mitigate the peak load regulation problem brought by renewable energy. The proper configuration of TES capacity can promote the efficient utilization of CSP resource as well …
DOI: 10.1016/j.egyr.2022.03.050 Corpus ID: 247650823 Optimization strategy of combined thermal-storage-photovoltaic economic operation considering deep peak load regulation demand With the fast growth of renewable energy, the modern power systems are ...
In this study, with different peak load regulation modes, thermal power units are considered for peak load regulation in power systems. An optimal scheduling …
The application of energy storage unit is a measure to reduce the peak load regulation pressure of thermal power units. In this paper, a joint optimal scheduling model of...
Eq. 1a is the quadratic coal consumption cost of TPU i at the time t, where P i, t g is the power output; a i, b i, and c i are the cost coefficients. Eq. 1b approximates the tear-and-wear cost of TPU based on the commonly used Manson-Coffin formula, where β is a cost conversion coefficient; S i g is the overall investment cost of TPU i, and N f (P i, t g) is the …
The power generated by all thermal storage schemes is less than 670 MW, and for the same thermal storage scheme, the power generation decreases as the thermal storage load increases. At the same time, the peak shaving depth increases with the increase of heat storage load.
1 Introduction At present, the peak-valley difference of load in coastal area of China continues to increase. With the large scale of nuclear power and wind power integrated to grid in recent years [1, 2], the situation of power system peak load regulation is increasingly serious. ...
Abstract: The requirement for primary frequency regulation (PFR) capability of thermal power plants (TPPs) in power systems with larger penetration of renewable energy resources …
On this basis, an optimal energy storage allocation model in a thermal power plant is proposed, which aims to maximize the total economic profits obtained from peak regulation and renewable energy utilization in the system simultaneously, while considering the operational constraints of energy storage and generation units.
Concentrating solar power (CSP) is a promising renewable and sustainable energy technology [1]. The integration of CSP with thermal storage systems can address the shortcomings of low renewable ...
Cryogenic energy storage is used for grid scale load shifting of nuclear power plant. •. Supercritical air liquefaction and re-gasification processes are facilitated by thermal fluid based sensible cold storage. •. Peak capacity of nuclear power station can be nearly tripled with a roundtrip efficiency of around 70%.
Applications of hydrogen energy. The positioning of hydrogen energy storage in the power system is different from electrochemical energy storage, mainly in the role of long-cycle, cross-seasonal, large-scale, in the power system "source-grid-load" has a rich application scenario, as shown in Fig. 11.
only focuses on energy storage peak regulation with a single demand, and the overall flexibility of the system is ... (5:00 AM to 10:00 AM), when the load increased and the thermal power unit output was low, the output of …
The application of energy storage unit is a measure to reduce the peak load regulation pressure of thermal power units. In this paper, a joint optimal …
Li et al. mainly evaluated the economy of BESS on the thermal power side for auxiliary peak regulation and verified that BESS could effectively reduce the peak …
In this paper, a method for capacity configuration of thermal energy storage in CSP is presented, based on the analysis of the operation characteristics of …
The numerical results show that the battery energy storage systems are charged correctly during peak hours (the charging power is between 0.45 and 0.90 kW, and the state of charge varies from 20 % to 78 %) and …
In recent years, the installed capacity of renewable energy, represented by solar energy, wind energy, small hydropower, etc., has increased dramatically [1, 2].Since the generation power of renewable energy is generally determined by external meteorological ...