Active and reactive coordination control method for cluster wind power plant based on power balance theory

Abstract

The invention discloses an active and reactive coordination control method for a cluster wind power plant based on a power balance theory. An active and reactive adaptation control method for the cluster wind power plant under steady state power fluctuation is provided; and after a power grid fails in transient state, the cluster wind power plant can quickly realize active and reactive coordination control by combining a security control strategy and the power balance theory. The method does not depend on a topological structure of the power grid in a wind power access place, and active and reactive adaptation balance under the steady state of the cluster wind power plant can be realized according to real-time sampled data under the current running mode of the power grid and the power balance theory; furthermore, coordination control in the active and reactive transient state of the cluster wind power plant is not realized until a total active and reactive control amount cut off by the security control system under different running modes of the power grid is counted; and moreover, active and reactive coordination control is realized by combining an active actual change situation and a reactive actual change situation of the system before and after failure.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a coordinated control method for active power and reactive power of cluster wind farms based on the principle of power balance. Background technique [0002] At the end of 2011, the National Standardization Management Committee issued the National Standard Announcement No. 23 of 2011, and approved the "(Technical Regulations for Wind Farm Connected to Power System" (GB / T 19963-2011). This standard stipulates the general technical requirements for wind farms connected to the grid. It stipulates the change rate of active power of wind farms and emergency control requirements, and makes more detailed regulations on the reactive capacity of wind farms and the requirements for voltage control of wind farms. Active power and reactive power adjustment capabilities, unfortunately, the domestic power system community has not ye...

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Problems solved by technology

This standard stipulates the general technical requirements for wind farms connected to the grid, which stipulates the requirements for the change rate of active power of wind farms and emergency control, and makes more detailed regulations on the reactive capacity of wind farms and the requirements for voltage control of wind farms. The above-mentioned grid connection technical regulations indicate that wind farms must have certain active power and reactive power adjustment capabilities when they are connected to the grid. A pilot device for wind farm power control, but the operation effect is not ideal, and it cannot meet the actual needs of dispatching operation

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