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Tie line out-of-limit control analysis method

A technology of over-limit control and analysis method, which is applied to AC networks with different sources of the same frequency, etc., and can solve problems such as few control indicators or control requirements, inability to apply grid structure, and inappropriate power grid management mode.

Inactive Publication Date: 2017-06-27
DALIAN UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CPS2 limits the unplanned power flow of the tie line, however, research shows that the limit value L of the CPS2 standard 10 Relatively strict, far smaller than the transmission space of the tie line, the exchange capacity of the tie line has not been fully utilized, which is contrary to the purpose of grid interconnection, especially not suitable for multi-regional wide-area joint regulation in UHV regional power grids
The North American Electricity Reliability Council uses the TOP (Transmission Operation) standard to limit the safety of power transmission operations, requiring to prevent system operating limits and interconnected power system reliability operating limits from exceeding the limits. This standard puts forward various guiding opinions more from a macro perspective , is to restrict the balancing agency, power transmission operator, power generation operator, and user agent from the overall framework and normative level, and rarely involves specific control indicators or control requirements, which is not suitable for the top-down management model of my country's power grid
my country's current T standard for controlling the power fluctuation of the tie line is aimed at the connection of a tie line between two control areas, which cannot be applied to the intricate grid structure in the UHV environment; and the T standard is limited to assessing the overall area at both ends of the tie line. It is difficult to directly guide the control strategy of each sub-region (such as each provincial power grid)

Method used

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Embodiment Construction

[0037] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0038] Such as figure 1 A tie line transgression control analysis method shown specifically includes the following steps:

[0039] S1: Distinguish the negative and positive effects of the frequency, voltage and power adjustment behaviors of each control area in the power system on the tie line power exceeding the limit;

[0040] S2: By examining the relationship between the regional control deviation of each control area in the power system and the power change of the tie line, to evaluate whether the regulation behavior of the control area in the power system is conducive to the recovery of the tie line overrun situation, and to obtain the impact of the power change of the tie line on each ...

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Abstract

The present invention discloses a tie line out-of-limit control analysis method. The method comprises: S1, distinguishing negative effects and positive effects of frequency, voltage and power regulation behaviors of each control area in a power system on the tie line power out-of-limit; S2, obtaining the sensitivity of the area control deviation of each control area according to the tie line power changing, and employing the sensitivity to show the one-to-one corresponding relation of the power changing of each tie line and the area control deviation of each control area in the power system; S3, distributing the area control deviation amount of an area to be checked into each generator set; S4, distinguishing the responsibility of each control area for the tie line out-of-limit according to the tie line power changing and the sensitivity of the area control deviation of each control area, and designing the tie line out-of-limit control evaluation standard; S5, determining the starting time point of the evaluation standard; and S6, determining the index form, the effect time and the parameter restriction of the evaluation standard.

Description

technical field [0001] The invention relates to the field of electric power system control, in particular to a tie-line overrun control analysis method. Background technique [0002] The overall distribution of power supply and demand in China is that the east and south coasts have large and concentrated power demand and few power generation resources, while the central part has relatively surplus power supply, while the northwest has abundant power generation resources and low load. Considering the intercontinental networking in the future, the surplus power in the Russian Far East and Central Asia may be sent to China. In the future, China's power flow will present the basic pattern of "power transmission from west to east" and "power transmission from north to south". Electric energy needs large-scale long-distance delivery. At the same time, in order to meet the growing demand for electricity, achieve sustainable development and reduce greenhouse gas emissions, the prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06
Inventor 刘娆路逊巴宇郭晓田池李卫东滕贤亮吴继平苏大威徐春雷
Owner DALIAN UNIV OF TECH
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