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The method of obtaining the upper and lower limit values ​​of coordinated busbar voltage coordination constraints in the province

A busbar voltage and busbar technology, which is applied in the field of obtaining the upper and lower limit values ​​of the provincially coordinated busbar voltage coordination constraints in the provincial coordinated voltage control, can solve the problems that have not yet been found, and achieve the improvement of the voltage safety level, the reasonable reactive power exchange, and the reduction of the grid. damage effect

Inactive Publication Date: 2011-12-28
TSINGHUA UNIV +1
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Problems solved by technology

However, no research results have been found to calculate the upper and lower limits of the coordinated bus voltage coordination constraints of the provincial land coordination in real time and transmit them to the ground dispatcher.

Method used

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  • The method of obtaining the upper and lower limit values ​​of coordinated busbar voltage coordination constraints in the province
  • The method of obtaining the upper and lower limit values ​​of coordinated busbar voltage coordination constraints in the province
  • The method of obtaining the upper and lower limit values ​​of coordinated busbar voltage coordination constraints in the province

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Embodiment Construction

[0035] The method for obtaining the upper and lower limit values ​​of the coordinated bus voltage coordination constraints proposed by the present invention is described in detail as follows in combination with the embodiments:

[0036] In this method, the control period is determined in advance. Generally, the period of the coordinated control of the province is 5 minutes to 15 minutes. This period can be manually set according to the actual situation and demand.

[0037] Firstly define: the 220KV bus of the 220KV substation at the provincial-local coordination boundary is the provincial-local coordination bus; suppose the provincial dispatching side includes s generators, s generator buses, and the monitoring bus (the bus that needs to monitor the voltage limit specified manually)p There are q provincial coordination buses (s, p, q are all non-negative integers);

[0038] This method comprises the following steps:

[0039] 1) At the beginning of a control cycle, the provinc...

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Abstract

The invention relates to a method for acquiring coordinated constraint upper and lower limits of provincial-regional coordinated busbar voltage, and belongs to the technical field of power system automatic voltage control. The method comprises that: based on quasi-steady-state sensitivity, a second time programming model is constructed to calculate the upper limit of the coordinated busbar voltage which can increase reactive power output of a provincial dispatching generator as possible under the conditions of meeting a generator busbar voltage constraint limit, a coordinated busbar voltage operating constraint limit, a monitoring busbar voltage constraint limit and a generator reactive power constraint limit, and the lower limit of the coordinated busbar voltage which can decrease reactive power output of the provincial dispatching generator as possible under the conditions of meeting the generator busbar voltage constraint limit, the coordinated busbar voltage operating constraint limit, the monitoring busbar voltage constraint limit and the generator reactive power constraint limit. The method can effectively reduce grid loss and improve voltage safety level of power grids.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, and in particular relates to a method for obtaining upper and lower limit values ​​of coordinated busbar voltage coordination constraints in provincial-regional coordinated voltage control. Background technique [0002] Automatic Voltage Control (AVC, Automatic Voltage Control) system is one of the most important automatic control systems in power systems. The scale of China's interconnected power grid is huge, and its operation is managed by a multi-level dispatching organization with layers and partitions. Network dispatching, provincial dispatching and local dispatching are the three representative dispatching levels. The traditional reactive power optimization control system is aimed at independent control of power grids at all levels, and lacks effective coordination among them. In fact, due to the mutual influence between all levels of power grid...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 孙宏斌鲁庭瑞郭庆来郭建伟王彬李海峰张伯明罗建裕吴文传刘华伟陈江澜
Owner TSINGHUA UNIV
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