Direct-current power distribution and utilization system state feedback control method based on Taylor expansion

A state feedback and feedback control technology, applied in the parallel operation of DC power supply and other directions, can solve problems such as difficulty in solving the stability problem of DC power distribution system

Pending Publication Date: 2021-04-16
TIANJIN UNIV +2
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  • Description
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  • Application Information

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Problems solved by technology

Considering the project cost and other factors, most of the existing research results use the scheme 1 and the scheme 3 to solve the stability problem of the DC power distribution system. However, when the filter parameters of the converter are designed according to the voltage and current ripple, the existing scheme is It is difficult to solve the stability problem of DC power distribution system

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  • Direct-current power distribution and utilization system state feedback control method based on Taylor expansion
  • Direct-current power distribution and utilization system state feedback control method based on Taylor expansion
  • Direct-current power distribution and utilization system state feedback control method based on Taylor expansion

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Embodiment Construction

[0021]The state feedback control algorithm proposed based on Tayller-based DC appliance system present invention will be described in conjunction with the accompanying drawings and detailed description.

[0022](1) Establish an equivalent circuit of DC application power system

[0023]The research object of the present invention typically includes a distributed power source such as a voltage source substator, a photovoltaic and a fan, and a typical topology of the DC application power system, such as a distributed power supply such as a voltage source substator, a photovoltaic and a fan.figure 1 Indicated.

[0024]Based on filtering parameters, line parameters, and input filter capacitance of each constant power load can be established,figure 2 The DC application electrical system is equivalent circuit. Ideal DC voltage source ukThat is, the output voltage of the kth-based electric pressure source converter, the kth-based voltage source converter is used by filter inductance Lfk And filter c...

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Abstract

The invention provides a direct-current power distribution and utilization system state feedback control method based on Taylor expansion, which is characterized by comprising the following steps of: 1, establishing an equivalent order reduction circuit of a direct-current power distribution and utilization system, and calculating an equivalent filter capacitance Ceq, an equivalent filter inductance Leq and a constant-power load equivalent current IL; 2, establishing a linear differential equation set of the equivalent order reduction circuit of the direct-current power distribution and utilization system considering state feedback control, and calculating state feedback gains k1 and k2; and 3, realizing stable control over the direct-current bus voltage of the direct-current power distribution and utilization system by considering state feedback control.

Description

Technical field[0001]The present invention belongs to the field of stable control of DC application electrical systems, and in particular, the present invention relates to a state feedback control method based on DC application power system based on Taylor deployment.Background technique[0002]With the rapid development of the national economy, the DC application power system has obvious advantages over energy efficiency, power distribution capacity, distribution loss, construction costs, etc., the DC application power system is the future development trend. There is generally only constant power load in the DC application power system, and its negative resistance characteristics make the entire DC application electrical system weak damping characteristics; at the same time, a large number of power electronic devices completely replace traditional transformers and generators, making the entire DC application The electric system presents low inertial characteristics, causing a DC appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10
Inventor 朱琳陈庆刘海涛季宇熊雄肖小龙司鑫尧王一振郭力赵学深卢浩
Owner TIANJIN UNIV
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