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Control method for power plant and transformer station coordination voltage based on real time update of coordination restraint

A voltage control method and technology of voltage control, applied in the direction of adaptive control, general control system, control/regulation system, etc., to achieve the effect of improving safety and improving the ability of accident disturbance

Inactive Publication Date: 2009-11-04
TSINGHUA UNIV
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Problems solved by technology

[0034] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a coordinated voltage control method for power plants and substations (hereinafter referred to as the coordinated voltage control of power plants and substations) that is updated in real time based on coordination constraints. Constraints, solve the problem of coordinated control of continuous variables in power plants and discrete variables in substations in automatic voltage control, and avoid complex mixed integer programming problems online

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  • Control method for power plant and transformer station coordination voltage based on real time update of coordination restraint
  • Control method for power plant and transformer station coordination voltage based on real time update of coordination restraint
  • Control method for power plant and transformer station coordination voltage based on real time update of coordination restraint

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[0052] The power plant and substation coordinated voltage control method based on the coordination constraint real-time update proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments:

[0053] Based on the principle of "priority action of discrete equipment in substations and fine adjustment of continuous equipment in power plants", the present invention proposes a coordinated voltage control method for power plants and stations based on real-time updates of coordination constraints. The control process is as follows figure 2 As shown, it specifically includes the following steps:

[0054] 1) The voltage control area is composed of m power plants and n substations, and the voltage vector V of the monitoring bus at the substation side is selected s As a coordinating variable between the power plant and the substation, at the beginning of a control cycle, the current value V of the coordinating variable i...

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Abstract

The present invention provides a coordinated voltage control method based on the coordinating and restricting a real-time updating power plant and substation, belonging to power system automatic voltage control technical field. The invention selects the substation bus as a coordination variable between plants, firstly, each substation is processed with instation automatic voltage control according to the method of ''Nine zone pictures'', and according to the control result, the constraint condition of the coordination variable of the substation is real-time updated by adopting expert rules method; a constraint condition is added to the coordinated secondary voltage control mode of the region to unify solution, reactive power control strategy of the generator is solved. The CSVC mode has no discrete variable, belonging to conventional secondary planning mode, avoiding the resolving of the problem of the complex mixed integer programming, improving the credibility of the real-time control.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, in particular to a method for coordinating voltage control between (power) plants and (substation) stations. Background technique [0002] Automatic voltage control (hereinafter referred to as AVC, Automatic Voltage Control) system is an important means to achieve power grid security (increase voltage stability margin), economy (reduce network loss), and high-quality (increase voltage pass rate) operation. Its control means include continuous variable (generator reactive power at the power plant side) and discrete variables (capacitance, reactance, on-load tap changer taps (OLTCs) at the substation side), AVC essentially coordinates these control variables to meet reasonable The process of power voltage distribution. This involves how to realize the coordinated control of continuous variables and discrete variables. [0003] Predecessors have conducte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G05B13/00
Inventor 孙宏斌郭庆来张伯明吴文传王彬
Owner TSINGHUA UNIV
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