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Reactive voltage coordination control method based on flexible multi-state switch (FMSS)

A coordinated control and multi-state technology, applied in AC network voltage adjustment, reactive power compensation, circuit devices, etc., to improve voltage fluctuations, ensure safety and economy, and improve voltage levels

Pending Publication Date: 2019-04-26
HEFEI UNIV OF TECH +2
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  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, flexible multi-state switchgear is used as a control method to solve the problem of reactive power and voltage coordinated control of power distribution systems.

Method used

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  • Reactive voltage coordination control method based on flexible multi-state switch (FMSS)
  • Reactive voltage coordination control method based on flexible multi-state switch (FMSS)
  • Reactive voltage coordination control method based on flexible multi-state switch (FMSS)

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Embodiment Construction

[0043] see figure 1 and figure 2, in this embodiment, the reactive power and voltage coordinated control method based on the flexible multi-state switch is carried out according to the following steps:

[0044] Step 1, determine the weight coefficient;

[0045] For the selected power distribution system, according to different control objectives, determine the minimum index weight coefficient m of the sum of voltage deviations of each node of the power distribution system 1 and distribution system network loss minimum index weight coefficient m 2 , 0≤m 1 ≤1, 0≤m 2 ≤1. Different control objectives refer to the control objective with the minimum sum of node voltage deviations and the minimum network loss. The control objectives are determined according to the instructions of the power grid dispatching center; for example, if the selected power distribution system only requires safety but not Considering the network loss problem, there are: m 1 = 1, m 2 =0.

[0046] Ste...

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Abstract

The invention discloses a reactive voltage coordination control method based on a flexible multi-state switch (FMSS). Aiming at a selected power distribution system, the minimum index weight coefficient of the sum of all node voltage deviations and the minimum index weight coefficient of power losses are determined according to different control targets; the reactive voltage coordination control objective function of a power distribution system feeder line group is built according to the weight coefficients; constraint conditions of the power flow constraint, the control variable constraint and the security constraint are built, and a feeder line group reactive voltage coordination control optimization model constituted by the objective function and all the constraint conditions and basedon the FMSS is obtained; and aiming at the optimization model, solving is carried out to obtain the objective function value, reactive compensation quantities of all ports of the FMSS and all the nodevoltages of the power distribution system so as to achieve reactive voltage coordination control. The power distribution network feeder line group serves as a whole for voltage management, reactive output of the feeder line group is coordinated, and the voltage level of a whole regional power distribution network is effectively improved.

Description

technical field [0001] The invention relates to a reactive voltage coordination control method, more specifically a reactive voltage coordination control method based on a flexible multi-state switch. Background technique [0002] The problem of reactive power and voltage has always been the main concern of the distribution network system. [0003] The massive access of intermittent distributed generators (Distributed Generator, DG) and loads in the distribution network restricts the voltage stability of the distribution system. Effective compensation of reactive power is one of the important measures to ensure the safe operation of power grid lines. Existing reactive power compensation devices, such as capacitor banks, static var compensators (SVG), static synchronous compensators (STATCOM) and other equipment, realize power distribution system by injecting or absorbing reactive power to the point of common connection (PCC). reactive voltage regulation. However, the exis...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/20Y02E40/30
Inventor 张国荣马晓芳彭勃杨勇李继红陆翌王朝亮许烽裘鹏
Owner HEFEI UNIV OF TECH
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