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Transmission and distribution cooperative rapid robust load flow calculation method

A power flow calculation, fast technology, applied in the direction of AC network, AC network circuit, electrical components, etc. with the same frequency from different sources, can solve the problem of large disturbance of distribution network to transmission network, high amplitude sensitivity, and inability to guarantee convergence performance and other issues to achieve the effect of improving efficiency and robustness, strong operability, and easy implementation

Inactive Publication Date: 2021-02-23
ZHEJIANG UNIV
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Problems solved by technology

However, with the development of the active distribution network, the disturbance of the distribution network to the transmission network is relatively large, that is, the root node (boundary node) of the distribution network injects power with high sensitivity to the voltage amplitude of the root node, and the traditional master-slave split The method cannot guarantee the convergence performance

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  • Transmission and distribution cooperative rapid robust load flow calculation method
  • Transmission and distribution cooperative rapid robust load flow calculation method
  • Transmission and distribution cooperative rapid robust load flow calculation method

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Embodiment Construction

[0018] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the method of the present invention includes seven main steps: initialization, distribution network power flow calculation, transmission network power flow calculation, convergence test, iteration variable correction, current iteration number update, and maximum iteration number check. Specific steps are as follows:

[0020] Step S1: Set the initial value of the boundary node voltage amplitude Initial value of voltage phase angle Set the convergence accuracy η; set the maximum iteration number K; set the current iteration number k=0.

[0021] Step S2: According to the current boundary node voltage amplitude and voltage phase angle Use the forward push back method to calculate the power flow of the distribution network, and obtain the node voltage amplitude of each node of the distribution ne...

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Abstract

The invention discloses a transmission and distribution cooperative rapid robust load flow calculation method. The method mainly comprises seven sub-steps of initialization, power distribution networkload flow calculation, power transmission network load flow calculation, convergence check, iteration variable correction, current iteration frequency updating and maximum iteration frequency check.According to the method, the iteration variable values of two adjacent iteration steps are used for correcting the iteration variable, the efficiency and robustness of the whole transmission and distribution collaborative load flow calculation algorithm can be remarkably improved, and especially when the disturbance of the power distribution network to the power transmission network is large, which means that the sensitivity of boundary node injection power relative to a boundary node voltage amplitude is high, a problem of divergence of a traditional master-slave splitting method can be solved. Meanwhile, the method is high in operability and easy to implement.

Description

technical field [0001] The invention relates to a power flow analysis method for a power grid, a global power flow analysis method for the coordination of a transmission network and a distribution network, and in particular to a fast and robust power flow calculation method for a coordination of transmission and distribution. Background technique [0002] In the traditional dispatching mode, the transmission and distribution network is managed by different dispatching departments, and the analysis and calculation are also carried out independently. However, with a large number of distributed power sources connected, the coupling between the transmission network and the distribution network is greatly enhanced. This traditional independent analysis and calculation mode lacks synchronization and cannot meet the requirements of calculation accuracy. Therefore, the transmission network and the distribution network need to cooperate to calculate the accurate global power flow. T...

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Application Information

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IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/10H02J2203/20
Inventor 唐坤杰董树锋
Owner ZHEJIANG UNIV
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