Method for Power Flow Controller Location-Allocation and Optimized Flow Control method of Meshed DC Grid

Sun, Yinfeng; Wang, Zhenhao; Long, Chao; Li, Guoqing; Xia, Dapeng; Yang, Li

doi:10.1109/egrid48402.2019.9092745

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…With the increasing demand for distributed renewable clean energy such as solar energy and wind energy to access the power grid in recent years, the HVDC transmission system is gradually transforming from the traditional point-to-point transmission to Multi-Terminal HVDC (MT-HVDC) transmission and meshed networks. The development of Voltage Sourced Converter (VSC) technology makes it possible to build MT-HVDC systems [1][2][3]. In China, the ± 160 kV Nanao MT VSC HVDC project is commissioned in 2013, two 160 kV mechanical HVDC circuit breakers (CBs) are installed in 2017, and the ± 500 kV Zhangbei MT flexible DC power grid is commissioned in 2020 [4].…”

Section: Introductionmentioning

confidence: 99%

Synthetic test circuit with two‐level voltage source for HVDC circuit breakers

Xiu

Long

Qin

et al. 2023

IET Generation Trans & Dist

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In order to ensure the reliable interruption of high voltage direct current circuit breaker (HVDC CB), the breaking test of HVDC CB plays an important role in its performance verification. In this paper, the interruption process of the HVDC CB is analyzed, and the equivalent requirements for the breaking test of HVDC CB are summarized. In the breaking test of high voltage and high current, the transient interruption voltage (TIV) duration is short, which leads to insufficient voltage stress. A new synthetic test circuit for testing the interruption performance of HVDC CBs is proposed, which can solve the problem of insufficient TIV duration caused by insufficient test capacity. Subsequently, the working principle of the test circuit is introduced in detail and the design method of the circuit parameters is given. The short-circuit current breaking test simulation of HVDC CB is carried out. The simulation results fit most well with the results of actual test cases, which verifies the universality of this test method. Finally, a test platform is built to verify the principle of the test circuit. TIV rose to 2.5 kV compared to the predetermined system voltage of 1.67 kV during the test, which means that the key stress provided by the test circuit can meet the expected requirements.

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Section: Introductionmentioning

confidence: 99%

Synthetic test circuit with two‐level voltage source for HVDC circuit breakers

Xiu

Long

Qin

et al. 2023

IET Generation Trans & Dist

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show abstract

“…Another remarkable accident occurred in Venezuela. From the 7th to 9th March 2019, the local power system of 18 states in Venezuela were subjected to two continuous network attacks, resulting in the collapse of power systems directly [3]. These examples demonstrate that even though the power grid can operate normally, the damage to communication networks has grievous effects on entire power grids.…”

Section: Introductionmentioning

confidence: 99%

Local Evolution Model of the Communication Network for Reducing Outage Risk of Power Cyber-Physical System

Tang

et al. 2022

Energies

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The deep integration of power grids and communication networks is the basis for realizing the complete observability and controllability of power grids. The communication node or link is always built according to the physical nodes. This step is alternatively known as “designing with the same power tower”. However, the communication networks do not form a “one-to-one correspondence” relationship with the power physical network. The existing theory cannot be applied to guide the practical power grid planning. In this paper, a local evolution model of a communication network based on the physical power grid topology is proposed in terms of reconnection probabilities. Firstly, the construction and upgrading of information nodes and links are modeled by the reconnection probabilities. Then, the power flow entropy is employed to identify whether the power cyber-physical system (CPS) is at the self-organized state, indicating the high probability of cascading failures. In addition, on the basis of the cascading failure propagation model of the partially dependent power CPS, operation reliabilities of the power CPS are compared with different reconnection probabilities using the cumulative probability of load loss as the reliable index. In the end, a practical provincial power grid is analyzed as an example. It is shown that the ability of the power CPS to resist cascading failures can be improved by the local growth evolution model of the communication networks. The ability is greater when the probability of reconnection is p = 0.06. By updating or constructing new links, the change in power flow entropy can be effectively reduced.

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“…Figure 1-1 Estimated trajectory of renewable energy share in electricity [3] The ongoing energy substitution improves the dynamic performances of power system, such as the flexible power-flow interaction [4][5][6][7], and voltage control [8][9]. But it also raises issues of the low system inertial [10][11] and the adaptability problems of conventional protection methods, etc.…”

Section: Background and Motivationmentioning

confidence: 99%

“…In the third step, some new contributions, e.g. novel differential protection scheme, the improvements of distance protection, and the upgrade of FCG control, are presented based on the protective challenges analyzed in the previous step (Chapters [3][4][5][6].…”

Section: Chapter 7 Conclusion and Future Workmentioning

confidence: 99%

Advanced Protection Schemes of Modern Transmission Grids with Large-Scale Power Electronics

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General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.-Users may download and print one copy of any publication from the public portal for the purpose of private study or research. -You may not further distribute the material or use it for any profit-making activity or commercial gain -You may freely distribute the URL identifying the publication in the public portal - V ENGLISH SUMMARYIn the modern power system, the transition of conventional fossil sources to renewable energies has achieved huge progress, which benefits from power electronic technologies, including the aspects of topology, control, stability, and reliability, etc. It contributes to reducing the stress on the global environment and achieving the goals of sustainable development. Typically, a growing numbers of renewable energy power plants are integrated (or upgraded) in the transmission level to bear massive electric power supply. Under such background, the conventional network protections face increasing adaptability problems, due to the different fault responses of nonsynchronous (power electronic) generators compared with synchronous ones.

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Method for Power Flow Controller Location-Allocation and Optimized Flow Control method of Meshed DC Grid

Cited by 4 publications

References 16 publications

Synthetic test circuit with two‐level voltage source for HVDC circuit breakers

Synthetic test circuit with two‐level voltage source for HVDC circuit breakers

Local Evolution Model of the Communication Network for Reducing Outage Risk of Power Cyber-Physical System

Advanced Protection Schemes of Modern Transmission Grids with Large-Scale Power Electronics

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