IPFC-containing power system power flow optimization control method

A technology of power system and optimal control, applied in the direction of AC network, circuit device, AC network circuit with different sources of the same frequency, etc., can solve the problems of difficulty and limited learning ability of SELM.

Inactive Publication Date: 2020-12-01
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +4
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Problems solved by technology

However, due to the random generation of input weights and the determination process of analyzing output weights, the learning ability of SELM is limited, and due to the complex relationship between the operating state of the system power system and the OPF (Optimal Power Flow) solution relationship, it is not easy to directly apply SELM to solve OPF

Method used

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  • IPFC-containing power system power flow optimization control method
  • IPFC-containing power system power flow optimization control method
  • IPFC-containing power system power flow optimization control method

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Embodiment 1）

[0042] The power flow optimization control method of the power system containing IPFC in this embodiment is mainly implemented based on the following steps:

[0043] ①Based on the grid structure containing IPFC, determine the equivalent power injection model of IPFC.

[0044] In this step, the IPFC is connected to the series branch with an equivalent voltage source. In the OPF calculation, the IPFC is connected to the system using the equivalent power injection model to avoid modification of the admittance matrix, and the effect of the IPFC is equivalent to the Line power injection. The structure diagram of the equivalent power injection model of IPFC is as follows: figure 1 shown. IPFCs are connected in series in line r-s, r-t , respectively introduce virtual nodes on the lines on the series side m, n , then the original line power is transferred between the virtual node and the end node of the line. The voltage phasor amplitudes of the IPFC equivalent voltage source a...

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Abstract

The invention provides an IPFC-containing power system power flow optimization control method, which comprises the following steps (1) determining an IPFC equivalent power injection model based on anIPFC-containing power grid structure; (2) giving an IPFC-containing power system OPF model, carrying out OPF calculation, and establishing a training set and a test set; (3) establishing a data-drivenoptimal power flow model based on an SELM framework; (4) training the established data-driven optimal power flow model based on the SELM framework in three stages; and (5) during engineering application, directly substituting the active power and the reactive power of the load of the IPFC-containing power system into the SELM framework-based data-driven optimal power flow model trained in the step (4) as input data, and calculating and obtaining an OPF result. According to the invention, the method can effectively improve the solving efficiency while guaranteeing the OPF calculation precision, facilitates the power flow optimization control of an IPFC-containing power system, just needs to adjust a small number of parameters during online application, and is high in engineering application value.

Description

technical field [0001] The invention relates to the technical field of power system power flow control, in particular to an IPFC-containing power system power flow optimization control method. Background technique [0002] With the rapid economic development, the power load continues to grow, and with the large-scale integration of new energy sources such as photovoltaics and wind power into the power grid, the structure of transmission lines is becoming increasingly complex, which brings new challenges to the stable operation of the power grid. Therefore, there is an urgent need for a flexible power flow control device that can control the power flow of multiple lines and control the real-time power interaction between heavy-load lines and light-load lines. The Interline Power Flow Controller (IPFC) has excellent multi-line power flow control capabilities gradually attracted attention. However, most of the optimal power flow models considering IPFC are mainly solved by phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 李群刘建坤张恪卫志农孙国强曹冬明邓占峰张宁宇周建华陈胜
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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