Self-adaptive device and method for analyzing global power flow of generation, transmission and distribution

A technology of global power flow and analysis device, applied in circuit devices, AC network circuits, electrical components, etc., can solve problems such as large differences in branch impedance parameters, inability to use global power flow analysis, and convergence accuracy requirements should not be the same.

CN101572409AInactive Publication Date: 2009-11-04NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-11-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a self-adaptive device and a method for analyzing global power flow of generation, transmission and distribution, which belongs to the technical field of power transmission and distribution of power systems. The device comprises an upper computer and a lower computer, wherein the lower computer comprises a power-flow feedback module; a global power system is divided into a master system and a slave system; according to the characteristics of each part of the power system, the master system adopts a Newton-Raphson power-flow analysis method, while the slave system adopts a forward-backward substitution power-flow analysis method; and the master system and the slave system are organically linked together through master-slave-system association nodes in the middle. The invention has the advantages that the device adopts the power-flow feedback module, uses slave-system node-voltage signals obtained from last power-flow calculation of the slave system for next power-flow calculation of the slave system, and realizes the optimization of the prior forward-backward substitution algorithms, and as the method adopts the forward-backward substitution method which reduces iterations compared with the prior forward-backward substitution method, the device for analyzing global power flow not only guarantees accurate power-flow analysis, but also raises convergence rate and saves storage space.
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Description

technical field

[0001] The invention belongs to the technical field of power transmission and distribution in electric power systems, and in particular relates to an adaptive power transmission and distribution global power flow analysis device and method. Background technique

[0002] Power flow analysis is a basic electrical analysis operation for studying the steady-state operation of the power system. It has great practical value in all aspects of the power system. The task of conventional power flow analysis is to determine the operation of the entire system according to the given operating conditions and network structure. Status, such as the voltage on each bus, the power distribution in the network, and power loss.

[0003] In most traditional power flow analysis, the analysis of the global power flow generally adopts the unified power flow analysis method, but in fact the characteristics of the power generation and transmission system and the power distribution syst...

Examples

Embodiment Construction

[0089] The detailed structure of an adaptive transmission, transmission and distribution global power flow analysis device of the present invention is described in conjunction with an embodiment.

[0090] The circuit structure and working process are as follows: the hardware device of the present invention includes a host computer and a lower computer, and the lower computer includes a front module, an A / D conversion module, a DSP module, a keyboard and a liquid crystal display module, a power flow feedback module, and a communication module. The setting module includes a voltage sensor and a power sensor. The connection of the device is that the voltage sensor and the power sensor in the front module are respectively connected to the A / D conversion module, and the A / D conversion module is connected to the DSP module, the communication module and the upper computer in turn, and the keyboard and The liquid crystal display module is connected to the DSP module, and the power flow...