Method for power system load identification parameter equivalence to low-voltage nodes
A load model and power system technology, applied in the effective field, can solve the problems of lack of synchronous vector measurement unit layout, difficult to directly identify and other problems, and achieve the effect of wide applicability, high feasibility and effective network topology.
Active Publication Date: 2019-05-03
TSINGHUA UNIV +1
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to propose a method for identifying parameters of a power system load model that is equivalent to a low-voltage node, so as to solve the problem that in the prior art, the load model parameters under the low-voltage node in the power system are difficult to directly identify due to the lack of synchronous vector measurement unit layout. The problem
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The method for identifying parameters of the power system load model equivalent to the low-voltage node proposed by the present invention, the schematic diagram of the connection relationship between the high-voltage node and the low-voltage node in the power system involved is as follows figure 1 described, including the following steps:
[0020] (1) Set the constant impedance Z under the high voltage node in the power system H with motor load M H Parallel, and set the constant impedance Z under the low-voltage node in the power system L with motor load M L in parallel;
[0021](2) Use the load model parameter identification method based on noise-like signals. This method can be found in Zhang Xinran. Research on power system load model identification based on wide-area noise-like information [D], Tsinghua University, 2016, on synchronous phases in power systems The parameters of the voltage amplitude, phase angle and power curve of the high-voltage node of the mea...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for power system load identification parameter equivalence to low-voltage nodes, and belongs to the field of power system load model parameter identification. The method comprises, in view of a load model parameter identified from a high-voltage node based on a noise-like signal, calculating the total transmission reactance of the high-voltage node to various subordinate low-voltage nodes by using the network topology of the power grid; allocating the transmission reactance of each branch to a static load branch and a motor branch according to a principle thatthe voltage is unchanged; subjecting the transmission reactance connected in series with the static load branch to parallel equivalence to the high-voltage node, and classifying the transmission reactance connected in series with the motor branch into a motor model and performing parallel equivalence; classifying the parallel reactance part of the equivalent static load into the new motor model obtained by parallel equivalence; and solving the equation by using the identification parameter and the equivalent parameter equal to each other to obtain the load model parameter conversion result ofthe low-voltage node.
Description
technical field [0001] The invention relates to a method for identifying parameters of a power system load model equivalent to a low-voltage node, and belongs to the technical field of power system load model parameter identification. Background technique [0002] With the rapid development of synchrophasor measurement technology (PMU), most of the 500kV stations in the power grid have deployed PMU devices. Using the voltage amplitude, phase angle and power measurement on the high voltage side of the station transformer, the parameters of the dynamic and static loads represented by the constant impedance + motor model under the 500kV station can be obtained through the load model parameter identification method based on the noise-like signal. Considering that in the actual system simulation, the load model is connected through the voltage level of 220kV and below, the guiding significance of the load identification parameters at the 500kV site is very limited. For this reas...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J3/00
Inventor 吴沛萱王颖陆超苏寅生黄河刘映尚
Owner TSINGHUA UNIV