Power spring control method based on variable universe fuzzy PI self-adaptive control

A technology of self-adaptive control and electric spring, applied in the direction of AC network voltage adjustment, single-network parallel feeding arrangement, reactive power compensation, etc., can solve problems such as weak self-adaptive ability, achieve improved self-adaptive ability and good adjustment effect Effect
CN110649648AActive Publication Date: 2020-01-03NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2020-01-03

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Abstract

The invention discloses a power spring control method based on variable universe fuzzy PI self-adaptive control. The method comprises steps of determining a fuzzy input variable and a fuzzy output variable, designing telescopic factors capable of adjusting the sizes of an input variable discourse domain and an output variable discourse domain, combining a quantization factor and a scaling factor with the corresponding telescopic factors to realize variable discourse domains, designing a fuzzy controller membership function and a fuzzy rule, and completing fuzzy reasoning and sharpening. The method is advantaged in that influence of change of the system working condition or parameter in the system operation process on the power spring adjustment performance is considered, the variable universe fuzzy PI self-adaptive control strategy is designed according to characteristics of a power spring, problems that when existing fuzzy control is applied to a power spring control system, the self-adaptive capacity is not high, and control precision is not high can be solved, the system stability is further enhanced, and the power spring adjusting capacity is improved.
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Description

technical field

[0001] The invention relates to the technical field of electric spring control, in particular to an electric spring control method based on variable universe fuzzy PI adaptive control. Background technique

[0002] The proportion of grid-connected renewable energy power generation is gradually increasing, and the intermittent and unstable power generated by it will bring great disturbance to the grid. In order to solve this problem, Xu Shuyuan's research group at the University of Hong Kong proposed the concept of electric springs for the first time, and divided the loads in the circuit into critical loads and non-critical loads. Similar to the principle of mechanical springs, electric springs can stabilize the voltage of critical loads when the grid voltage fluctuates, and transfer voltage fluctuations to non-critical loads to achieve the goal of protecting critical loads.

[0003] In the traditional electric spring control system, the PI parameters cannot ...

Claims

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