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Prevention and control method considering control mode of IPFC

A technology of control mode and preventive control, which is applied to AC networks with the same frequency from different sources, AC network circuits, electrical components, etc., can solve the problems of single function limitation, lack of IPFC control mode preventive control optimization, etc.

Active Publication Date: 2020-09-22
SOUTHEAST UNIV +3
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Problems solved by technology

[0004] 1) The current researched IPFC model can only realize the power flow calculation with line power as the control target, and only considers the constant power mode, so the function is relatively limited. However, IPFC has multiple control modes, and can also control the bus voltage amplitude and bus voltage. The phase angle and line equivalent impedance can be adjusted, and different control functions can be realized according to actual needs
[0005] 2) Current research lacks preventive control optimization for IPFC control mode
In actual operation, more attention is paid to the continuity and reliability of the system power supply, while the above literatures all consider optimization under the steady-state operation of the system, and do not include the N-1 security constraints of the system

Method used

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  • Prevention and control method considering control mode of IPFC
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  • Prevention and control method considering control mode of IPFC

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Embodiment Construction

[0109] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0110] The present invention proposes a preventive control method considering the IPFC control mode, such as figure 1 As shown, the specific steps are as follows:

[0111] S1: Power flow calculation of power system with IPFC under normal operation and N-1 fault

[0112] IPFC model based on power injection method such as figure 2 As shown, the additional injection power of nodes i, m, n is:

[0113]

[0114]

[0115]

[0116] Among them, the main control line of IPFC is line ij, and the auxiliary control line is ik; m and n are added as additional virtual nodes; in case the formula is repeated, the following statement is specially made, Vse , θ se (se=seim, sein) is the amplitude and phase angle of the output voltage of the coupled series transformer, V b , θ b (b=i,j,k,m,n) is the corresponding node voltage amplitude and phas...

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Abstract

The invention discloses a prevention and control method considering the control mode of an IPFC. Various control modes of the IPFC are considered, and power system power flow calculation including a main control mode and an auxiliary control mode is performed by utilizing the power flow calculation iteration format under each control mode of the IPFC; a multi-objective optimization function integrating practicability and safety is constructed, and operation constraints of the power system and the IPFC are provided; and prevention and control power flow optimization of the power system is realized based on a particle swarm optimization algorithm. According to the invention, the static control potential of the IPFC can be fully mined, the optimization of power flow distribution during steady-state operation of the system is realized, and the practicability and the static safety level of the system are significantly improved.

Description

technical field [0001] The invention belongs to the field of power system operation analysis and stability control, and in particular relates to a preventive control method considering an IPFC control mode. Background technique [0002] In recent years, with the increase of national electricity demand, the grid scale of the transmission network has continued to expand and the topological structure has become more complex, resulting in uneven power flow distribution of transmission lines and challenging the security and stability of system operation. Interline Power Flow Controller (IPFC) is one of the most powerful comprehensive FACTS (FlexibleAC Transmission Systems, FACTS) devices. As its main function, IPFC can realize precise regulation of power flows on multiple lines. The optimization effect is remarkable. Installing it in the power grid can solve the transmission bottleneck problem caused by the uneven distribution of power flow and improve the static safety margin of...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/46
CPCH02J3/06H02J3/466H02J2203/10Y02E40/10
Inventor 吴熙王瑞王亮陶加贵徐晓轶陈轩
Owner SOUTHEAST UNIV
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