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A Measurement Configuration Method for Harmonic State Estimation of Transmission Network

A technology of harmonic state estimation and measurement configuration, which is applied to harmonic reduction devices and AC networks to reduce harmonics/ripples, etc., can solve problems such as impossible installation and expensive harmonic monitoring devices, and reduce investment , Improve the effect of system observability

Active Publication Date: 2018-01-16
SOUTHEAST UNIV
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Problems solved by technology

However, the price of the harmonic monitoring device is still relatively expensive, and it is impossible to install it in the whole network, and it is only installed in the main nodes of some power grids
Meanwhile, harmonic state estimation has a strong dependence on the number and location of monitoring configurations
If the number of monitoring configurations is insufficient or the monitoring locations cannot meet the requirements, only the harmonic state of some nodes can be estimated

Method used

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  • A Measurement Configuration Method for Harmonic State Estimation of Transmission Network
  • A Measurement Configuration Method for Harmonic State Estimation of Transmission Network
  • A Measurement Configuration Method for Harmonic State Estimation of Transmission Network

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Embodiment Construction

[0039] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] like figure 1 As shown, a measurement configuration method for harmonic state estimation of a transmission network according to the present invention includes the following steps:

[0041] Step 10) Obtain the network topology of the transmission network.

[0042] In step 10), obtaining the network topology of the transmission network includes: first identifying the number of buses and branches in the transmission network, and then determining the transmission network according to the spatial layout of each node in the transmission network and the electrical connection between nodes and branches. network topology. This step is a conventional technique in the art.

[0043] Step 20) collecting network information: collecting the information of measuring substations in the transmission network and the harmonic source information on the l...

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Abstract

The invention discloses a measurement configuration method used for power transmission network harmonic wave state estimation. The method comprises the following steps: Step 10) a power transmission network topology structure is obtained; Step 20) network information is acquired; Step 30) a data integrity degree is verified; if a data integrity degree requirement is satisfied, Step (40) will be performed; otherwise, Step 20) will be performed again; Step 40) data preprocessing; a first network topology structure matrix is obtained based on the transmission network topology structure obtained in the Step 10); processing is carried out on the a first network topology structure matrix to obtain a second network topology structure matrix; and Step 50) measurement configuration is carried out on a power transmission network, The method facilitates harmonic wave state estimation carried out on the whole network and harmonic wave pollution traceablility. Convenience is provided for professional personnel to carry out targeted treatment so as to improve safe and stable operation of a power grid.

Description

technical field [0001] The invention belongs to the technical field of power quality monitoring, and relates to a measurement configuration method for harmonic state estimation of a transmission network. Background technique [0002] With the development of power electronics technology, various power electronic devices such as inverters, rectifiers and various switching power supplies are connected to the grid on a large scale. The switching action of these devices injects a large amount of harmonics into the grid. At the same time, there are other nonlinear loads such as electric arc furnaces and electric welding machines in the power system. These loads have the characteristics of impact and unbalanced power consumption, thus becoming the harmonic source of the grid. Harmonic sources rapidly spread from local areas to the entire power grid, and the harmonic pollution in the power grid is becoming more and more serious, which greatly affects the power quality. Harmonic p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 顾伟邱海峰王旭冲储佳伟
Owner SOUTHEAST UNIV
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