Large grid real-time scheduling method for accepting access of wind power

Abstract

The invention relates to a large grid real-time scheduling method for accepting access of wind power, which belongs to the technical field of power system operation and control. The method comprises: according to the characteristics of wind power and load fluctuation and the control characteristics of generator sets, classifying the generator sets in the whole grid; acquiring the current plan, real-time output, connecting line plan, numerical weather prediction and other related information of each generator set; performing ultrashort period load prediction and wind power output prediction towork out the output regulation amount at next moment of real-time scheduling generator sets and construct an active real-time scheduling model with the smallest wind loss; working out the output regulation amount of the real-time scheduling generator sets including the wind power generator sets by using a simplex method; and transmitting the next output regulation amount of thermal power generator sets directly, and giving the output maximum value at next moment of the wind power generator sets. In the invention, the combined optimized scheduling of the wind power generator sets and traditional generator sets is performed to eliminate wind power generation prediction deviation and load prediction deviation in advance, so the wind power accepting capability of a power grid is improved to the maximum extent while the operation economy of the power grid is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and particularly relates to a real-time scheduling method for a large power grid that accommodates wind power access. Background technique [0002] Due to environmental pollution caused by traditional thermal power units, global warming and other factors, renewable energy represented by wind power has been greatly developed in recent years. With the increasing proportion of wind power, its impact on the normal dispatching operation of the power grid is becoming more and more important. At present, in the power system, all units including thermal power units, hydropower units and wind power units are called whole-network units. [0003] At present, the power grid generally includes several wind farms, and multiple wind turbines form a wind farm. Due to the inherent characteristics of wind power such as randomness and volatility, traditional dispatching methods cannot a...

AI Technical Summary

Problems solved by technology

Due to the inherent characteristics of wind power such as randomness and volatility, traditional dispatching methods cannot adapt to the grid dispatching control after large-scale wind power access

The traditional dispatcher mainly adopts the mode of day-ahead planning plus real-time automatic generation control (AGC). This dispatching mode mainly has the following problems: (1) Due to the large deviation between the day-ahead forecast results and the actual output of wind power, the day-ahead plan is not being implemented. There is a large deviation between the actual situation and the output plan of some wind farms is too small, resulting in a large wind power loss, while the output plan of some wind farms is too large, resulting in a large deviation of the system's power generation load, which increases the load on the AGC unit. burden

(2) Due to the limited control ability of the AGC unit, in order to ensure the power balance, the dispatcher has to temporarily adjust the dispatching strategy according to the power imbalance, and the workload is heavy, and this dispatching mode makes it difficult to guarantee the safety and power quality of the system

(3) Due to the anti-peaking characteristics of wind power, the burden on the AGC unit is further increased, and the problem of insufficient AGC adjustment margin often occurs, which affects the safety of the system and power quality

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