Tie line out-of-limit control analysis method

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...

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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)

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