Tidal current automatic regulating method based on node type conversion

A node type, automatic adjustment technology, applied in the direction of AC network circuits, instruments, calculations, etc., can solve the problems of long calculation time and inapplicability to large-scale systems, achieve fast adjustment speed, reduce the number of adjustments, and reduce the adjustment time Effect

Inactive Publication Date: 2015-04-01
CHINA SOUTHERN POWER GRID COMPANY +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide an automatic power flow adjustment method ...

Method used

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  • Tidal current automatic regulating method based on node type conversion
  • Tidal current automatic regulating method based on node type conversion
  • Tidal current automatic regulating method based on node type conversion

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Experimental program
Comparison scheme
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Embodiment 1

[0042] What this embodiment adopts is the IEEE 39 node standard test system, and the system structure is as attached figure 1 As shown, the system includes 10 generators, 39 nodes, 12 transformers, 34 lines, and node 31 is a balance node. This system represents an electrical network in New England, USA, where the generator at node 39 is an equivalent machine, representing the electrical network of the Canadian portion connected to this system. The system reference power is 100MVA.

[0043]For the three situations of insufficient reactive power of a single node, insufficient reactive power of multiple nodes, and slight imbalance of active power, the adjustment method provided by the present invention is used for adjustment. The adjustment steps are as follows: figure 2 shown.

[0044] Insufficient reactive power of a single node refers to expanding the reactive load of node 12 from 88Mvar to 880Mvar; insufficient reactive power of multiple nodes refers to expanding the react...

Embodiment 2

[0052] This embodiment uses the data of Shaoguan City Power Grid under Fengda operation mode in 2013. The system includes 125 generators, 454 nodes, and 167 AC lines. The above experiments are carried out on the system, and the simulation results in Table 2 are obtained. Insufficient reactive power of a single node in the table refers to the expansion of the reactive load of the 37KV bus in Huangchen from 1.5Mvar to 80Mvar; insufficient reactive power of multiple nodes refers to the reactive load of the 10.5KV buses in Zhangshi, Xinfeng, Jinpeng, and Dungang respectively Expand to 80Mvar; Slight active power imbalance refers to expanding the active load of cast and forged 10.5KV busbars from 19MW to 100MW.

[0053] Table 2 Simulation results of power grid in Shaoguan City

[0054]

[0055] It can be seen from the results in the table that when the adjustment method provided by the present invention is applied to a large-scale system, it has a good effect on the system pow...

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Abstract

The invention discloses a tidal current automatic regulating method based on node type conversion, and aims at regulating tidal current calculation misconvergence caused by reactive power imbalance. The method comprises the following steps that when the tidal current calculation misconvergence of a system is ceased by the reactive power imbalance, all PQ nodes in the system are set into PV node types, the tidal current calculation is carried out, and the tidal current calculation convergence is realized. Reactive vacancy indexes of the nodes are obtained, the nodes are gradually recovered into the PQ nodes according to index values, the tidal current calculation is repeatedly carried out, and the nodes incapable of being recovered are determined. The regulating method provided by the invention has the advantages that a good effect can be respectively achieved on the tidal current calculation misconvergence caused by reactive power imbalance and slight active power imbalance; obtained results provide tidal current regulation basis for workers, and the foundation is also laid for the tidal current reasonability regulation; the regulation speed of an algorithm is high, and the tidal current automatic regulating method is applicable to a large-scale system.

Description

technical field [0001] The invention belongs to the field of power system analysis, and more specifically relates to a power flow automatic adjustment method based on node type conversion. Background technique [0002] In recent years, in order to meet the needs of economic development, my country's electric power industry has developed rapidly, and power grid construction is developing in the direction of large power grids, ultra-high voltage and long-distance power transmission; at the same time, with the sharp increase in power consumption, the load level of the power system is increasing. The heavier the weight, the use intensity of power generation and transmission equipment is gradually approaching its limit value. In this context, when the power flow calculation is performed on the initial system operation mode manually generated in the grid mode calculation work, non-convergence will be encountered. [0003] In view of this situation, the staff usually can only make ...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
CPCG16Z99/00H02J3/00
Inventor 韩云飞李智欢苏寅生陈金富黄河孙鑫朱乔木
Owner CHINA SOUTHERN POWER GRID COMPANY
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