Active power steady-state security region construction method considering single TCSC (thyristor-controlled series compensation) equivalent reactance parameters

A technology of static safety domain and equivalent reactance, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve problems such as changes in active static safety domain and changes in system power flow distribution characteristics

Active Publication Date: 2018-02-23
WUHAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

With the change of TCSC equivalent reactance parameters, the admittance matrix of the system nodes will be changed, which will inevitably change the power flow distribution characteristics of the system, and lead to changes in the active static safety domain of the system

Method used

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  • Active power steady-state security region construction method considering single TCSC (thyristor-controlled series compensation) equivalent reactance parameters
  • Active power steady-state security region construction method considering single TCSC (thyristor-controlled series compensation) equivalent reactance parameters
  • Active power steady-state security region construction method considering single TCSC (thyristor-controlled series compensation) equivalent reactance parameters

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Embodiment

[0035] The method proposed in this patent has been verified under multiple example models. Due to space limitations, this embodiment takes the improved IEEE39 example as an example to analyze and verify the feasibility and effectiveness of the method proposed in this paper. Details are as follows:

[0036] Suppose a TCSC is connected in series in branch 2-25 in the IEEE39 calculation example, and the branch 14-4 is used as the object to construct its X TCSC APSSR.

[0037] On the one hand, based on the proposed method, corresponding to formulas (3)-(4), k can be calculated dm 、a m The results are shown in Table 1, k dh 、k dl 、a r1 、a r2 The result is as follows (6):

[0038]

[0039] Table 1 Branch 2-25 equivalent disconnected system k dm 、a m value

[0040]

[0041] Then (5) can be modified as:

[0042]

[0043] If take X TCSC =-0.0015, each P can be obtained m0 The corresponding hyperplane coefficients are shown in columns 2 and 5 in Table 2 below.

[...

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Abstract

The present invention relates to an active power steady-state security region construction method considering single TCSC (thyristor-controlled series compensation) equivalent reactance parameters. According to the method, thyristor-controlled series compensation equivalent reactance parameters and node active power are combined creatively; according to a problem that an existing active power steady-state security region construction method does not consider TCSC equivalent parameters, a method of correcting the injection power of nodes is adopted to replace a method of changing the structuralparameters of a power grid to influence the distribution of power flow, so as to analyze TCSC; the display expression of an injection power space active power steady-state security region consideringsingle TCSC equivalent reactance parameters is theoretically inferred; and a problem that a traditional method needs to traverse TCSC equivalent reactance values and generate a series of active powersteady-state security regions one by one can be solved. Combined with engineering practices, the method of the invention has high analysis efficiency and can satisfy on-line steady-state security assessment.

Description

technical field [0001] The invention relates to a method for constructing an active static safety domain in consideration of a single TCSC equivalent reactance parameter. Background technique [0002] With the continuous access of new energy power generation devices, the smart grid presents the characteristics of random power output, uncertain load level, etc., and the power flow distribution is complex and changeable. As an important part of the security domain methodology, the static security domain is effectively applicable to the real-time online security monitoring and preventive control of the power system under the above background. [0003] Traditionally, the static security domain is a collection of injected power that guarantees the safe and stable operation of the power system under a given network structure. For the active static safety domain that is more concerned about the transmission network, the current research focuses on the branch power flow constraints...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20Y02E40/10
Inventor 林涛陈汝斯陈宝平毕如玉
Owner WUHAN UNIV
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