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Multi-variant control method of the distribution static reactive power generator

A multi-variable control and static var technology, which is applied in the direction of adjusting electric variables, electric controllers, and controllers with specific characteristics, can solve problems such as difficult adaptive control and complex control of power distribution static var generators. Achieve good adaptability, reduce mutual influence, and improve stability

Inactive Publication Date: 2007-08-15
HUNAN UNIV
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Problems solved by technology

[0003] In order to solve the technical problems of complex control of existing power distribution static var generators and difficulty in realizing adaptive control, the present invention provides a power distribution static var generator with simple implementation, strong adaptability, and good dynamic and static performance. multivariable control method

Method used

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Embodiment Construction

[0015] As shown in Fig. 1, the main circuit of the controlled object power distribution static var generator of the present invention is composed of a three-phase voltage type inverter. The power switching device adopts a self-shutoff power switching device IGBT, and the DC side energy storage element is a capacitor C, which provides DC voltage support for the operation of the inverter. The connection between the power distribution static var generator device and the power grid adopts a coupling transformer, and the transformation ratio of the transformer is 1:1 or 1:2 to choose from. In order to filter out high-frequency burrs caused by power switching devices, an LC filter circuit is used in the output circuit of the power distribution static var generator. The control of distribution static var generator adopts current indirect control method. In the control technology, the sine wave pulse width modulation technology (SPWM) is used to control the output voltage U of the in...

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Abstract

The disclosed multivariable control method for distribution static reactive generator comprises: detecting the access-point voltage and dc-side capacitance voltage to compare with reference value and obtain error, calculating the error and error increment; taking the error and error increment as NN input to train NN and adjust PID controller parameters to obtain modulation parameter and phase difference for the inverter; obtaining the switch control signal. This invention is adaptive.

Description

technical field [0001] The invention relates to a control method of a static var generator for power distribution, in particular to a multivariable control method for a static var generator for power distribution based on neural network tuning of PID parameters. Background technique [0002] Poor voltage quality is an important power quality problem, which will cause huge economic losses to power companies and power users, and will pose a threat to the safety, stability and economic operation of the power grid. An effective way to solve voltage quality problems is to install reactive power compensation devices in the power grid. Distribution static var generators represent the development trend of reactive power compensation devices in power systems in the future, and can comprehensively solve various power quality problems in distribution networks. In the medium and low voltage power distribution system, the distribution static var generator usually adopts the circuit topo...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/16G05F1/70G05B13/02G05B11/42
CPCY02E40/34Y02E40/12Y02E40/10Y02E40/30
Inventor 罗安唐杰欧剑波刘定国荣飞
Owner HUNAN UNIV
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