Reactive Power Control Method for High Voltage Distribution Network Based on Linear Constraint of Gateway Power Factor
A power factor and linear constraint technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, circuit devices, etc., can solve problems such as low automation level, unreasonable convergence point, huge data, etc., to improve voltage regulation Ability to make up for the effect of convergence difficulties
Active Publication Date: 2019-01-18
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0002] At present, the distribution network of the power system has the characteristics of low automation level, huge data, and complex topology. As a result, the reactive power and voltage regulation capability of the system is often unable to meet the "layered" local balance requirements of reactive power in the network. The problem of voltage quality and economic operation is becoming more and more prominent
[0003] For the grid structure and operation characteristics of the current high-voltage distribution network, modern optimization algorithms will have problems such as convergence difficulties or unreasonable convergence points.
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[0027] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation and protection of the present invention are not limited thereto.
[0028] figure 1 The specific flow of the reactive power control method of the high-voltage distribution network based on the linear constraint of the gate power factor is shown, including the following adjustment steps:
[0029] (1) Collect network structure parameters, read network operating parameters, and calculate initial power flow.
[0030] (2) According to the initial power flow of the network, combined with regional reactive power load characteristics and voltage and reactive power adjustment capabilities, determine the target adjustment parameters: V min , V max .
[0031] (3) Carry out local reactive power balance adjustment of 110kV substation. pass Control the switching of the low-side compensation device of the 110kV s...
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The invention provides a high-voltage power distribution network reactive power control method based on gateway power factor linear constraint in order to solve the problem that due to complex topological condition, a high-voltage power distribution network cannot achieve reactive layered on-spot balance. The method includes the specific steps that firstly, network structure parameters are collected, network operation parameters are read, network initial power flow is calculated, and target adjustment parameters are determined; secondly, by means of power factor adjustment targets at high-voltage gateways of 110 kV and 220 kV substations, switching of a substation lower-side compensation device is conducted, and accordingly on-spot reactive balance adjustment of the 110 kV substation and global reactive voltage adjustment of the 220 kV substation are conducted; finally, dynamic reactive adjustment is conducted on nodes which still cannot meet voltage safety constraint requirement, so that it is guaranteed that voltage of all nodes in a network run in a safe and economical range, and a final compensation device switching scheme is determined.
Description
technical field [0001] The invention relates to a voltage and reactive power adjustment method of an electric power system, in particular to a reactive power control method of a high-voltage distribution network based on a gate power factor linear constraint. Background technique [0002] At present, the distribution network of the power system has the characteristics of low automation level, huge data, and complex topology. As a result, the reactive power and voltage regulation capability of the system is often unable to meet the "layered" local balance requirements of reactive power in the network. Voltage quality problems and economic operation problems are becoming more and more prominent. [0003] For the grid structure and operation characteristics of the current high-voltage distribution network, modern optimization algorithms will have problems such as convergence difficulties or unreasonable convergence points. [0004] Aiming at the current situation of reactive p...
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IPC IPC(8): H02J3/18
CPCH02J3/18H02J2203/20Y02E40/30
Inventor 胡鑫张勇军刘斯亮
Owner SOUTH CHINA UNIV OF TECH