New energy available capability assessment method considering transient security constraints

A technology of transient safety and acceptance capacity, applied in the direction of single grid parallel feeding arrangement, etc., can solve the problems of ignoring the grid structure constraints of new energy grid connection points, ignoring channel constraints, one-sided and limited measurement of new energy capacity, etc. The effect of improving the capacity of new energy
CN104882905AActive Publication Date: 2015-09-02NARI TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NARI TECH CO LTD
Publication Date
2015-09-02

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Abstract

The invention discloses a new energy available capability assessment method considering transient security constraints, belongs to the field of new energy available capability assessment. According to the invention, on the basis of the EEAC theory, transient security constraints are added into an existing new energy available capability assessment method; and on the basis of the existing assessment method with peak and frequency modulation constraints as reference, full consideration is given to the transient security stability constraints of an outgoing channel, the transient power angle stability margin, transient voltage security margin and transient frequency drop acceptability margin are quantified, and the unit adjustment sequence is determined according to the magnitude of sensitivity of the output adjustment of a new energy unit under a buckling mode. The invention is capable of achieving optimal output adjustment of the new energy unit under a transient buckling forbidden faulty set, and meanwhile achieving the new energy grid-connected maximum availability while satisfying safe and stable operation of a power grid.
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Description

technical field

[0001] The invention belongs to the field of evaluation of new energy acceptance capacity, and in particular relates to an evaluation method for evaluating the ability of a power grid to accept large-scale grid-connected new energy from the perspective of power grid transient security and stability. Background technique

[0002] In recent years, the grid-connected scale of wind power photovoltaic new energy installations has grown rapidly, and the large-scale development and utilization of new energy has alleviated the problems of traditional energy depletion and environmental pollution to a certain extent. However, new energy represented by wind power and photovoltaics has the characteristics of output uncertainty, randomness, and anti-peak regulation. Its grid-connected access has brought great difficulties to the planning, operation and scheduling of the power grid. In addition, due to the decoupling of wind power photovoltaic unit speed and grid frequency...

Claims

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