A Site Selection Method for Distributed Power Flow Controller Based on Fault Chain Model
A technology of power flow controller and accident chain, applied in the field of distributed power flow controller site selection based on the accident chain model, can solve the problems of large area, complex structure, high one-time investment cost, and achieve reduced risks and barriers. The effect of the development process
Active Publication Date: 2018-05-22
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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However, centralized large-scale FACTS equipment has a complex structure, a large footprint, high one-time investment costs, and high requirements for daily operation and maintenance personnel, and the current reliability of its control and protection systems, power electronic devices, and cooling systems also needs to be further improved
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[0026] The present invention will be further described below in conjunction with embodiment. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0027] Such as figure 1 As shown, the analysis process is as follows:
[0028] (1) Step 1: According to the power generation, load, grid structure, and operation mode data of the power grid, scan and obtain the cascading fault chain L of the entire network L={L 1 , L 2 , L 3}, where the accident chain L 1 It is composed of lines k1, k3, and k6, and the maximum value of predictive indicators at each level is F 11 , F 12 , F 13 ; Accident chain L 2 It is composed of lines k2 and k6, and the maximum value of predictive indicators at each level is F 21 , F 22 ; Accident chain L 3 It is composed of lines k5, k3, and k7, and the maximum value of predictive indicators at each level is F 31 , F 32 , F 33...
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The invention discloses an accident chain mode based distributed power flow controller location method. The method comprises the following steps of taking power flow misconvergence or power angle oscillation and divergence as the end conditions of an accident chain, and scanning cascading failure accident chains from the whole network; establishing a multi-dimensional index system for representing the influence degree of each accident chain, including a voltage deviation index, a frequency deviation index, a power flow balance degree index and an active load loss rate index; carrying out quantitative assessment on the influence of each accident chain by a gray comprehensive evaluation method; and finally, defining and recalculating the line importance index by combination of the accident chain influence comprehensive evaluation index and the prediction index of each link of the accident chains, and completing the distributed power flow controller recommendation location according to the sorting result of the indexes. According to the location method, the gray comprehensive evaluation is introduced to the influence analysis of the accident chains, so that the characteristic of a small number of the accident chain samples of the power grid is satisfied, and a reference can be provided to the pre-planning of the location of the distributed power flow controller.
Description
technical field [0001] The invention belongs to the field of flexible alternating current transmission and relates to a site selection method for a distributed power flow controller based on an accident chain model. Background technique [0002] In a system without any power flow control device, the grid power flow is mainly distributed naturally according to the impedance function of the system transmission line, etc. Compared with the high impedance transmission line, the low impedance transmission line will bear a larger system power flow. However, this naturally formed and uncontrolled power flow distribution is generally not the power flow distribution expected by the system operation, and may bring insufficient transmission capacity, large transmission loss, over-limit voltage, and even system stability damage to the system operation. series of questions. In order to improve the power flow distribution of the system, people have proposed the idea and scheme of using p...
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IPC IPC(8): H02J3/06G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/00H02J3/06H02J2203/20
Inventor 陈静刘建坤周前崔林赵静波王大江安海云胡昊明
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST