Harmonic algorithm of active power distribution network based on situation awareness and control system thereof
An active distribution network and situation awareness technology, applied in the direction of harmonic reduction device, measurement of electrical variables, measurement of current/voltage, etc., can solve the problem of inability to timely and accurately measure changes in distribution network harmonics, distribution network waveforms Distortion, cannot effectively solve the problems of distribution network management evaluation, etc., to achieve the effect of reducing the scope of power outages, reducing the processing burden, and improving the reliability of power supply
Pending Publication Date: 2022-07-08
GUIZHOU NORMAL UNIVERSITY
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Problems solved by technology
[0006] Aiming at the deficiencies in the existing technology, the present invention proposes a harmonic algorithm and its control system for the active distribution network based on situational awareness, so as to solve the problem that the change of harmonics in the distribution network cannot be measured timely and accurately, resulting in The waveform in the network is distorted, which cannot effectively solve the problems of management evaluation, forecast planning, operation control and fault diagnosis in the distribution network
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[0056]Embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.
[0057] A harmonic algorithm for an active distribution network based on situational awareness includes the following steps:
[0058] Step 1: Obtain the sampled value of current and the sampled value of voltage by performing AC sampling from the distribution network.
[0059] Step 2: Construct the sampled value of the current and the sampled value of the voltage as complex sequences respectively.
[0060] In this embodiment, the 32-point current {i(n)} sampled values and the 32-point voltage {u(n)} sampled values collected from AC sampling in the distribution network respectively construct a complex...
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The invention relates to the technical field of active power distribution, in particular to a harmonic algorithm of an active power distribution network based on situation awareness and a control system thereof. The algorithm comprises the following steps: performing alternating current sampling in a power distribution network to obtain a sampling value of current and a sampling value of voltage; constructing the sampling values of the current and the sampling values of the voltage into complex sequences respectively; performing discrete Fourier transform on the complex sequence, and obtaining an electrical parameter formula, a frequency spectrum formula of voltage and a frequency spectrum formula of current according to complex conjugate properties of the discrete Fourier transform; respectively calculating the harmonic content of the voltage and the harmonic content of the current through a frequency spectrum formula of the voltage and a frequency spectrum formula of the current; and basic electrical parameters in the power distribution network are calculated through an electrical parameter formula. The invention aims to solve the problems that the waveform in the power distribution network is distorted due to the fact that the change of harmonic waves in the power distribution network cannot be accurately measured in time, and management evaluation, prediction planning, operation control and fault diagnosis in the power distribution network cannot be effectively solved.
Description
technical field [0001] The invention relates to the technical field of active power distribution, in particular to a harmonic algorithm of an active power distribution network based on situational awareness and a control system thereof. Background technique [0002] Active distribution network is a form of smart grid. The adoption of active distribution network technology helps to make full use of clean energy and renewable energy in various places. The situational awareness of active distribution network is obtained in the large-scale system environment of the power grid. A technology that processes, mines and analyzes the data that causes changes in the operation of the power grid, and presents the results in a visual way. Through situational awareness, the overall and accurate control of the operation situation of the active distribution network can be achieved, which provides a strong support for intelligent management and control based on situational awareness to improv...
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IPC IPC(8): G01R23/16G01R19/00
CPCG01R23/16G01R19/00Y02E40/40
Inventor 刘宇刚吴舰
Owner GUIZHOU NORMAL UNIVERSITY