Security distance for distribution system: Definition, calculation, and application

Xiao, Jun; Lin, Qisi; Bai, Linquan; Zhang, Xinsong; Zuo, Li; Zhou, Hui; Li, Hang

doi:10.1002/2050-7038.2838

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…The dimension of the dispatchable region is related to the number of wind farms, and visualizing the dispatchable region becomes challenging when the number of wind farms exceeds three [22]. The security distance, which reflects the security margin in various directions, is defined as the vertical distance from the current OP to the boundaries of the dispatchable region [23,24]. The concept of security distance has been extensively applied in power system analysis, such as security assessment [25,26].…”

Section: Related Workmentioning

confidence: 99%

Grid‐side flexibility assessment based on security distance of dispatchable region for AC/DC hybrid system using approximate second‐order cone relaxation

Wang,

Qin

2024

IET Generation Trans & Dist

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The rapid growth of offshore wind power has resulted in a mismatch between generation and demand because of its variability. To quantify the maximum wind power penetration of the transmission network, the dispatchable region is defined as the largest region in the uncertainty space. The security distance is defined as the minimum distance from the operating point to the boundaries of the dispatchable region. System operators can use security distance as a metric to assess the flexibility of the power system. This paper proposes a method to construct the dispatchable region for the AC/DC hybrid system with VSC‐HVDC by outer convex relaxation firstly. The second‐order cone relaxation is employed to reformulate non‐convex and non‐linear power flow equations. Next, a polyhedral approximation is adopted to obtain the convex hull of the dispatchable region. Subsequently, an efficient algorithm known as adaptive constraint generation (Ad‐CG) is introduced to calculate the boundaries of the dispatchable region. Furthermore, solving the Chebyshev centre problem determines the minimal security distance. The modified IEEE 5‐bus and 39‐bus system is used for validating effectiveness of the proposed method and evaluating the impact of the converter reactive power compensation capacity and generation dispatch on the dispatchable region.

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Section: Related Workmentioning

confidence: 99%

Grid‐side flexibility assessment based on security distance of dispatchable region for AC/DC hybrid system using approximate second‐order cone relaxation

Wang,

Qin

2024

IET Generation Trans & Dist

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“…The minimum variance coefficient of security distance is taken as an objective function in the new network reconfiguration model to show that the model can satisfy N-1 security [14]. In addition, boundary supply capability (BSC) [15] and security distance [16] for distribution systems are proposed based on DSSR. The concept and method of DSSR have also been extended to areas such as integrated energy systems [17,18].…”

Section: Introductionmentioning

confidence: 99%

Decoupling and dimension reduction method for distribution system security region

Xiao,

Fan,

Jiang

2023

IET Energy Syst Integration

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The application of the security region methodology in a practical distribution system with large scale normally requires large computer memory and high computation time. To overcome this problem, this article proposes a decoupling and dimension reduction method, which can significantly accelerate the calculation of distribution system security region (DSSR) and is important for the application of the DSSR theory in large‐scale distribution systems. First, the definition of DSSR dimension reflecting the size of solution space and the time complexity is proposed. And the solution algorithm for DSSR dimension is also given. Second, a decoupling and dimension reduction method suitable for the analysis of DSSR is proposed. Following the method, an incidence matrix can be obtained from the DSSR expressions, which can be further divided into multiple block matrices. According to the feeder combinations of the block matrices, the distribution system can be decoupled into multiple sub‐networks for more efficient analysis. Finally, a 10kV distribution network is used in case study to validate the proposed method. The results for a time‐consuming calculation, that is, TSC curve calculation, show that the proposed method can reduce the computation time significantly, making the time‐consuming calculation suitable for the analysis of large‐scale cases.

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“…Jin et al adopted a game model to analyze the behavior of market participants and calculated different market-clearing prices (MCPs) under different information disclosure scenarios (Jin et al, 2021). The security region method is popular in power system security analysis (Xiao et al, 2019). The security region method can judge power system security involving a variety of security constraints (Jiang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Research on the Trading Arrangement and Clearing Model of Medium- and Long-Term Inter-Provincial Markets Considering Security Constraints

Yang

Li³

et al. 2022

Front. Energy Res.

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In the process of deepening market-oriented reform, the most important thing in China is building a national unified electricity market system under a high renewable energy penetration scenario. The new round of market-oriented reform proposes to establish an inter-provincial electricity-trading arrangement. Due to imperfect market mechanisms and immature inter-provincial electricity markets, we investigate the electricity market operation system of the national unified electricity market. Existing transmission commitments, trading cycles, market participants, strategic bids, and clearing and settlement mechanisms are analyzed for inter-provincial medium- and long-term markets. For security reasons of interchange schedules, we propose a novel inter-provincial market-clearing model based on static security regions, which consider inter-provincial electricity transmissions and direct current power flows. The proposed market-clearing model is simulated and verified in a 3-bus system and an IEEE 30-bus system. The proposed clearing model and rational market theory are conducive not only to promoting renewable energy consumption but also to improving the linkages between inter-provincial medium- and long-term markets.

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Security distance for distribution system: Definition, calculation, and application

Cited by 10 publications

References 16 publications

Grid‐side flexibility assessment based on security distance of dispatchable region for AC/DC hybrid system using approximate second‐order cone relaxation

Grid‐side flexibility assessment based on security distance of dispatchable region for AC/DC hybrid system using approximate second‐order cone relaxation

Decoupling and dimension reduction method for distribution system security region

Research on the Trading Arrangement and Clearing Model of Medium- and Long-Term Inter-Provincial Markets Considering Security Constraints

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