active power filter fractional order pi λ and Active Disturbance Rejection Hybrid Control Method
A technology of power filter and active disturbance rejection controller, which is applied in active power filtering and AC network to reduce harmonics/ripples, etc. It can solve the problem of only compensating for specific harmonics, unstable filtering performance, and impedance characteristics big problem
Active Publication Date: 2019-09-20
HOHAI UNIV CHANGZHOU
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The control effect of passive filters on harmonics is greatly affected by the impedance characteristics of the system, and is easily affected by changes in temperature, harmonics and nonlinear loads, and its filtering performance is unstable
In addition, passive filters can only filter out harmonics of a specific order, so they are not suitable for places with complex harmonics
There are defects such as compensation for specific harmonics, so the current treatment of power problems is mainly focused on active filters
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0095] A Fractional Order PI of Active Power Filter λ And ADRR hybrid control method, comprising the following steps:
[0096] (1) Establish the mathematical dynamic model of the active power filter. This embodiment adopts a single-phase parallel voltage type active power filter, and its main circuit structure is as follows figure 1 ;
[0097] The basic working principle of the active power filter is: by detecting the voltage and current of the compensation object, the command signal of the compensation current is calculated by the command current operation circuit, and the signal is amplified by the compensation current generation circuit to obtain the compensation current. It offsets with the harmonics and reactive currents to be compensated in the load current, and finally obtains the desired power supply current.
[0098] Since the action of the main circuit switch can control the magnitude of the AC measured voltage, the shunt active power filter can be considered as a ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention discloses an active power filter fractional order PI lambda and active disturbance rejection mixed control method. The method comprises a step of establishing a mathematical dynamic model of an active power filter, a step of establishing an active disturbance rejection controller and a fractional order PI lambda controller and using the fractional order PI lambda to control the direct current side capacitance voltage of the active power filter, and a step of inputting the control rule of the active power filter active disturbance rejection controller into a PWM controller to generate a signal which controls the switch-on and switch-off of an inverter, controlling a switch tube in a main circuit, generating compensation current required by the circuit, and injecting the compensation current into a power grid to realize current compensation and reactive power elimination. According to the mixed control strategy of the invention, the advantages of high precision control of the fractional order controller and strong anti-interference ability of the active disturbance rejection controller are fully combined, the real-time tracking of command current by the compensation current can be ensured, harmonic wave is effectively reduced, and the control method of the invention is better than a traditional control method.
Description
technical field [0001] The present invention relates to the technical field of active power filter, in particular to a fractional order PI filter of active power filter λ And ADRC hybrid control method. Background technique [0002] With the progress and development of society, people's living standards are improving day by day, and a large number of electrical equipment is put into daily production and life, followed by a large number of harmonic and reactive power pollution in the power grid, which Seriously affect the quality of electric energy. The existence of harmonic voltage or harmonic current in the power grid will increase the additional loss of power system equipment, cause problems such as failure of measurement and automatic control instruments, affect the efficiency of equipment, and may cause fires due to overheating of lines in severe cases. [0003] At present, external harmonic compensation devices are mainly used to compensate harmonics, and filters are ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/20
Inventor 刘倪宣费峻涛
Owner HOHAI UNIV CHANGZHOU