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Dynamic reactive power optimization method for extra-high voltage direct current near-region power grid based on ADMM decoupling algorithm

A technology of UHV DC and decoupling algorithm, which is applied in the field of dynamic reactive power optimization of UHV DC near-area power grid based on ADMM decoupling algorithm, can solve problems such as low solution efficiency, parameter setting, and weight value optimization results have great influence, etc. Achieve the effect of reducing the search space, fewer discrete variables, and reliable solutions

Pending Publication Date: 2022-03-15
CHONGQING UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the former often has the problem that the weight value has a great influence on the optimization result and the setting is difficult; the latter also has problems such as low solution efficiency or parameter setting when using intelligent algorithms, weight methods, ε-constraint methods and other strategies to solve Pareto solutions

Method used

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  • Dynamic reactive power optimization method for extra-high voltage direct current near-region power grid based on ADMM decoupling algorithm
  • Dynamic reactive power optimization method for extra-high voltage direct current near-region power grid based on ADMM decoupling algorithm
  • Dynamic reactive power optimization method for extra-high voltage direct current near-region power grid based on ADMM decoupling algorithm

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Embodiment 1

[0115] see Figure 1 to Figure 10 , a dynamic reactive power optimization method for UHV DC near-area grid based on ADMM decoupling algorithm, including the following steps:

[0116] 1) Establish the dynamic reactive power optimization model of the UHV DC near-area power grid considering the variable operating range of the converter bus voltage. The objective function of the network loss target of the dynamic reactive power optimization model of the AC-DC system is as follows:

[0117]

[0118] In the formula, the superscript t represents the time period t, T is the number of time periods, and ΔT t Indicates the length of time period t; and Respectively represent the active power of generator (converter) i, load j and converter station k, if the converter station is a rectifier station s P,k = 1, if the converter station is an inverter station s P,k =-1;N G , N L and N D Respectively represent the number of generator (converter) nodes, load nodes and converter stat...

Embodiment 2

[0208] The embodiment adopts the actual data of the ZLT converter station and its nearby AC power grid in Northeast my country. The example system includes 1 converter station, 15 substations and 9 power plants closely related to its electrical connection. The equivalent circuit diagram of its AC system is shown in Figure 4 , the number of AC bus nodes is 85, the number of generator nodes is 9; the number of parallel capacitive reactor reactive power compensation nodes is 18, among them, nodes 32, 34, 35, 37, 39, 42, 44, 45, 56, 58, 60 and 62 include two types of reactive power compensation devices, shunt capacitors and shunt reactors, and the number of groups of reactive power compensation devices of each node and each type = 1 to 4. See Table 1 to Table 7 for detailed parameters; See the equivalent circuit Figure 5 , the model parameters are shown in Table 8, the minimum filter table is shown in Table 9, and the DC system rated capacity P dN =10000MW, rated DC voltage U ...

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Abstract

The invention discloses an extra-high voltage direct current near-region power grid dynamic reactive power optimization method based on an ADMM decoupling algorithm. The method comprises the following steps: 1) acquiring basic data of an extra-high voltage direct current power grid; 2) establishing an extra-high voltage direct current near-region power grid dynamic reactive power optimization model considering the variable operation range of the converter bus voltage; and 3) solving the dynamic reactive power optimization model of the extra-high-voltage direct-current near-region power grid by using a two-stage solving method considering adaptive adjustment of a multi-target weight coefficient to obtain a reactive power optimization result of the power grid. The invention provides a self-adaptive adjustment strategy of a multi-target weight coefficient, and the problem of difficulty in setting a weight value can be effectively solved through limited times of weight coefficient self-adaptive adjustment calculation, so that different sub-target optimization results are more balanced; meanwhile, the problems that an intelligent algorithm is high in randomness and long in solving time can be effectively solved, and the solving efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of electric power system scheduling automation, in particular to a dynamic reactive power optimization method for an UHV DC near-area power grid based on the ADMM decoupling algorithm. Background technique [0002] The dynamic reactive power optimization of the AC / DC system can realize the spatial-temporal coordination of all continuous and discrete voltage regulation equipment, and provide an ideal decision-making basis for the reactive power resource evaluation and AVC strategy of the AC / DC interconnected grid. From the perspective of the whole day, discrete devices such as reactive power compensation devices and converter transformer tap-changers will operate with changes in load and DC power to maintain system power and voltage control requirements. However, for discrete voltage regulation equipment, the total number of operations per day is usually limited, especially for areas where the power flow of the AC syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06G06F30/20G06F17/10H02J3/18H02J3/50G06F111/04
CPCG06Q50/06G06F30/20H02J3/18H02J3/50G06F17/10H02J2203/20H02J2203/10G06F2111/04Y02E40/30Y02E40/70Y04S10/50
Inventor 颜伟莫静山张紫薇崔惟李程昊饶宇飞
Owner CHONGQING UNIV
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