Optimal configuration method of breaker and fault current limiter in ring network type DC micro-grid

A technology of fault current limiter and DC micro-grid, which is applied in the direction of automatically disconnected emergency protection devices, circuit devices, emergency protection circuit devices, etc., to achieve the effects of good convergence, fast operation speed, and reduced search space

Active Publication Date: 2018-10-09
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above, the present invention provides a method for optimizing the configuration of circuit breakers and fault current limiters in ring-t

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  • Optimal configuration method of breaker and fault current limiter in ring network type DC micro-grid
  • Optimal configuration method of breaker and fault current limiter in ring network type DC micro-grid
  • Optimal configuration method of breaker and fault current limiter in ring network type DC micro-grid

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[0045] In order to describe the present invention in more detail, the technical solution of the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0046] Such as figure 1 As shown, the method for optimizing the configuration of the circuit breaker and the fault current limiter in the ring network type DC microgrid of the present invention includes the following steps:

[0047] S01: Install a circuit breaker and a fault current limiter at both ends of all transmission branches in the ring-net DC microgrid, such as image 3 Shown.

[0048] Short-circuit faults in the DC microgrid are divided into three types: short-circuit faults of the transmission branch, converter faults, and busbar faults. By installing circuit breakers at both ends of all transmission branches, the DC microgrid can be effectively protected under the three short-circuit faults. When a short-circuit fault occurs in a power transmission branch, the circuit ...

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Abstract

The invention discloses an optimal configuration method of breaker and fault current limiter in ring network type DC micro-grid. The ring network type DC micro-grid change condition after the short-circuit fault is sufficiently considered and analyzed, and a method for accurately and quickly obtaining the fault DC micro-grid network voltage and the branch current is provided. By adopting the NSGA-II algorithm with fast operation speed and good solution set convergence is adopted and improved to perform the optimal configuration analysis of the breaker and the fault current limiter, and the practicability is strong. The two economic indexes of the breaking capacity of the breaker and the inductive value of the fault current limiter are used as the target function, and the reliability indexcapable of reliably breaking the branch is used as a constraint condition, and the obtained optimal configuration scheme has good economy and reliability at the same time.

Description

technical field [0001] The invention belongs to the technical field of direct current power distribution and utilization, and in particular relates to an optimal configuration method of a circuit breaker and a fault current limiter in a ring network type direct current microgrid. Background technique [0002] In recent years, global energy and environmental problems have become increasingly prominent. Distributed energy represented by clean and renewable energy such as wind energy and solar energy has become an important way to solve energy and environmental problems. In the grid-connection of distributed energy, domestic and foreign scholars have proposed the concept of micro-grid. The micro-grid uses a voltage source converter (Voltage Source Converter, VSC) as an interface for energy interaction with the large power grid and distributed energy. Coordinated control and other methods realize the unified management of distributed energy and improve the overall power supply q...

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Application Information

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IPC IPC(8): H02H7/26H02H3/00H02H3/087G06N3/00
CPCG06N3/006H02H3/006H02H3/087H02H7/268
Inventor 孔亮年珩
Owner ZHEJIANG UNIV
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