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Peak filtering method of direct-current microgrid system with uncertain feed constant-power load

A constant power load, DC microgrid technology, applied in the field of peak filtering, can solve problems such as quantization error and microgrid system uncertainty

Pending Publication Date: 2020-02-07
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing filtering method based on the T-S fuzzy model still has problems when applied to the DC microgrid system. The main reason is that there are often some quantization errors after signal quantization, which brings uncertainty to the microgrid system. State Estimation Method for Microgrid System

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  • Peak filtering method of direct-current microgrid system with uncertain feed constant-power load
  • Peak filtering method of direct-current microgrid system with uncertain feed constant-power load
  • Peak filtering method of direct-current microgrid system with uncertain feed constant-power load

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Embodiment Construction

[0089] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0090] A peak filtering method for a DC microgrid system with an uncertain feed constant power load, comprising the following sub-steps:

[0091] Step 1, establish a dynamic model of a single constant power load DC microgrid system;

[0092] Step 2, establishing dynamic models of multiple DC microgrid systems with constant power loads;

[0093] Step 3, constructing its corresponding T-S fuzzy model according to the model of the DC microgrid;

[0094] Step 4, designing the peak filter of the base T-S fuzzy model;

[0095] Step 5, solving the adjustment matrix of the switched peak filter;

[0096] Step 6. Assign the adjusted adjustment matrix obtained from the solution to the peak filter to realize the peak filter of the DC microgrid system with constant power load fed by uncertainty.

[0097] Step 1. In establishing a dynamic mode...

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Abstract

The invention discloses a peak filtering method of a direct-current microgrid system with an uncertain feed constant-power load. A peak filter based on a T-S fuzzy model is proposed and designed to solve the problem that system parameters are uncertain and drive the system to achieve a steady state. It should be pointed out that the peak filter provided by the invention can well solve the problemsthat the variable in a fuzzy membership is influenced by quantification due to the adoption of filtering control in a switching form, and the fuzzy membership function is not accurately known. By solving the LMI linear inequality, corresponding design conditions can be obtained, and the conservative property of the system can be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular relates to a peak filtering method for a DC micro-grid system with uncertain power feed and constant power load. Background technique [0002] With the rapid development of communication and computer technology, more and more control systems choose networks to connect various components. This system of transmitting information through a real-time network is called a network system. However, the introduction of the network as the communication channel of the system also brings some new problems, such as signal quantization, packet loss, signal transmission delay, etc. Because there are often some quantization errors after signal quantization, which may lead to system performance degradation or even system instability. At the same time, due to the continuous expansion of the application range of renewable energy in modern power grids, the control and sta...

Claims

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Application Information

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IPC IPC(8): H02J1/00H02J1/02
CPCH02J1/00H02J1/02
Inventor 解相朋夏剑锋胡松林岳东
Owner NANJING UNIV OF POSTS & TELECOMM