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A Simulation Method of Isolation Switches in Power Grid Topology

A technology for isolating knife switches and power grid topology, applied to electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2020-10-27
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention provides a technical solution for the simulation method, which can solve the problem that the switch or circuit breaker is not included in the real-time simulation model in the traditional power system digital simulation, resulting in the inability to control the above-mentioned components in the real-time simulation technical issues

Method used

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  • A Simulation Method of Isolation Switches in Power Grid Topology
  • A Simulation Method of Isolation Switches in Power Grid Topology
  • A Simulation Method of Isolation Switches in Power Grid Topology

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Embodiment Construction

[0034] A simulation method for isolating a switch in a grid topology, comprising the following steps:

[0035] Step 1) In the power grid simulation model, a quasi-steady-state model is used for the power grid part, and the grid node voltage equation is obtained. The grid node voltage equation includes the node admittance matrix Y, the node voltage vector current vector

[0036] Step 2) Obtain the node numbers at both ends of the circuit breaker during the topology of the power grid;

[0037] Step 3) relying on the circuit breaker to establish the simulation model of the isolation switch, and relying on the circuit breaker to establish the simulation model of the grounding switch;

[0038] For the grid node voltage equation, Y is the admittance matrix, is the node voltage vector, Inject current vectors for nodes. The grid node voltage equation of node n is expressed as:

[0039]

[0040] The above formula can be abbreviated as:

[0041] where Y is the admittance...

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Abstract

A simulation method of isolating knife switch in power grid topology. In the operation of the power grid, the role of the isolating knife switch is to form an obvious "breakpoint" in the switching operation, which is indispensable for forming a safe area in the power grid operation It does not participate in the "arc extinguishing" of the circuit during breaking or closing, and the isolation switch is often set in conjunction with the circuit breaker. Based on these actual characteristics, the isolation switch can be used in the construction of the power grid simulation model. The switch is considered based on the circuit breaker, so that the power grid simulation model does not include the isolation switch in the topology, but because it is considered based on the circuit breaker, it does not affect the realization of the "five-proof locking" function of the grid switching operation of the simulation system. The characteristic of this method is that it solves the "curse of dimensionality" problem caused by the isolation switch in the construction of the power grid simulation model according to the actual situation of power grid operation.

Description

technical field [0001] The invention belongs to the field of electric power systems and related equipment, and in particular relates to a simulation method for isolating knife switches in power grid topology. Background technique [0002] Power network topology analysis refers to the use of graph theory and other knowledge to analyze and study the geometric structure and properties of the power grid to reflect the connection of various electrical equipment components (generators, transformers, lines, busbars, circuit breakers, etc.) on the power system. Finally, according to the connection relationship between each component and the real-time opening and closing status of each switch, a mathematical model that can correctly describe the network structure and can be used for computer analysis is dynamically generated. It only reflects the physical connection relationship between each component in the system, and has nothing to do with the characteristics and specific electric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02H7/26G06F30/367
CPCH02J3/00H02H7/26G06F30/367H02J2203/20
Inventor 王虎
Owner STATE GRID CORP OF CHINA
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