Network multi-area electric power system load frequency control method based on self-adaptive event trigger mechanism

A technology of load frequency control and event triggering, applied to AC network circuits, electrical components, circuit devices, etc.

Active Publication Date: 2016-01-13
南通彤诺智能制造有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in the open power communication network, mainly in the power sharing communication network part of the wide area measurement system (WAMS), there are time-varying network-induced delays, data packet loss and out-of-sequence that cannot be ignored. Analysis, synthesis and design of control strategies present new challenges
[0003] In a multi-regional power system, multiple nodes share limited communication and computing resources. The traditional signal sampling method is often periodic, or the traditional event trigger mechanism of communication threshold and constant, so there will be some problems in the process of information transmission. A large amount of redundant sampling data that is ineffective for improving system performance brings enormous communication pressure to the communication network shared by the wide-area power system

Method used

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  • Network multi-area electric power system load frequency control method based on self-adaptive event trigger mechanism
  • Network multi-area electric power system load frequency control method based on self-adaptive event trigger mechanism
  • Network multi-area electric power system load frequency control method based on self-adaptive event trigger mechanism

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Experimental program
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Effect test

Embodiment 1

[0057] see figure 1 and figure 2 , the networked multi-area power system load frequency control method based on an adaptive event trigger mechanism, is characterized in that the operation steps are:

[0058] (1) Establish a dynamic model of multi-regional power system load frequency control considering communication factors;

[0059] (2) Introduce an adaptive event trigger mechanism;

[0060] (3) Establish a time-delay dynamic model of ACE-dependent multi-regional power system load frequency control with the introduction of an adaptive event trigger mechanism;

[0061] (4) Given the H of the system ∞ performance conditions;

[0062] (5) Determine the trigger matrix Φ and the controller gain matrix K.

Embodiment 2

[0064] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0065] 1. The step (1) establishes a multi-area power system load frequency control dynamic model considering communication factors:

[0066] x · ( t ) = A x ( t ) - B K C x ( t k ) + F ω ( t ) y ( t ) = ...

Embodiment 3

[0102] The load frequency control method of the networked multi-regional power system based on the adaptive event trigger mechanism is as follows:

[0103]1. Establishment of time-delay model for load frequency control of networked multi-regional power system with the introduction of adaptive event trigger mechanism

[0104] 1. Establish a dynamic model of multi-regional power system load frequency control considering communication factors

[0105] The power system is a complex nonlinear dynamic system. Since the load of the power system changes very little during normal operation, a linearized model can be used to represent the system dynamics near its operating point. The i-th subregion of the linearized multi-regional power system A dynamic model such as figure 1 shown. Depend on figure 1 The following relationship can be obtained:

[0106] Δf i = ...

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Abstract

The invention discloses a network multi-area electric power system load frequency control method based on a self-adaptive event trigger mechanism. The efficient self-adaptive event trigger mechanism is introduced to the conventional multi-area electric power system load frequency control, thereby reducing unnecessary data transmission while guaranteeing that the system obtains expected control performance, and saving limited network communication resources. According to the method, a network area control error (ACE)-dependent electric power system load frequency control delay model is established; and a convex combination analysis method is utilized in the process of carrying out system stability analysis and synthesis, thereby preventing the problem of introducing too many free-weighting matrixes in a conventional method, reducing operation time greatly and improving control and operation efficiency. The method enables the communication and control efficiencies of the multi-area electric power system load frequency control to be improved obviously.

Description

technical field [0001] The invention relates to a load frequency control method of a power system, in particular to a load frequency control method of a networked multi-area power system based on an adaptive event trigger mechanism. Background technique [0002] Load frequency control (LFC) is an important control method for the stable operation of power systems. For the interconnected multi-regional power system, there are usually two communication connection methods within the subsystem and between regions: one is a point-to-point dedicated line communication method, and the other is an open power communication network. There is a small constant delay in the dedicated line communication method, which is usually ignored when designing the LFC control strategy; compared with the traditional dedicated line communication method, the LFC control strategy using an open power communication network has the advantages of low cost and more flexibility . However, in the open power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J13/00
Inventor 彭晨张楚张进杜大军
Owner 南通彤诺智能制造有限公司
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