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Micro-grid distributed economic operation control method based on cascade inverters

A technology of cascaded inverters and economical operation, which is applied in the direction of single-network parallel feeding arrangement, electrical components, circuit devices, etc., and can solve the problems of cascaded inverters in the AC microgrid economical operation control problems that are rarely involved. , to achieve the effect that the control method is simple and feasible

Pending Publication Date: 2022-08-02
MOUTAI INST
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Problems solved by technology

[0006] However, these methods only solve part of the economic operation control problem of the microgrid based on parallel inverters, and the economic operation control problem of the AC microgrid based on cascaded inverters is still seldom covered, especially in the absence of communication background. The control problem of optimal economic operation realized by means of decentralized control

Method used

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  • Micro-grid distributed economic operation control method based on cascade inverters
  • Micro-grid distributed economic operation control method based on cascade inverters
  • Micro-grid distributed economic operation control method based on cascade inverters

Examples

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Embodiment 1

[0052] Example 1: as Figure 1-13 As shown, a distributed economical operation control method for microgrid based on cascaded inverters, the method includes the following steps:

[0053] S1. Obtain the load voltage V PCC , the total number of distributed micro-sources in the microgrid, and the functional relationship between the power generation cost of each distributed micro-source and the output active power;

[0054] S2. According to the total number of distributed micro-sources in the S1 microgrid and the power generation cost function of each distributed micro-source, construct the optimal active power output P of each distributed micro-source i * Function relationship P with load current I i * =g i (I);

[0055] S3. According to the load voltage and the optimal active power output function, construct the functional relationship between the output voltage of each micro-source and the load current;

[0056] S4, according to the output voltage relationship as the volta...

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Abstract

The invention discloses a cascaded inverter-based distributed economic operation control method for a micro-grid. The method comprises the following steps of: obtaining load voltage of the micro-grid, the total number of distributed micro-sources and a function relationship between power generation cost of each distributed micro-source and output active power; constructing a function relationship between the optimal active power output of each distributed micro-source and the load current according to the load voltage, the total number of micro-sources and a power generation cost function; according to the load voltage and the optimal power output function, constructing a function relationship between the output voltage of each micro-source and the load current; the output voltage forms a voltage reference value of each micro-source, and a frequency reference value of each micro-source is constructed by combining a synchronization theory; according to voltage outer loop and current inner loop control and PWM modulation technology, adjustment of each inverter is realized, and then optimal economic operation control is realized.

Description

technical field [0001] The invention relates to a microgrid distributed economical operation control method based on cascaded inverters, and belongs to the technical field of smart grids. Background technique [0002] At present, in view of economic challenges, advanced technology development and environmental protection, integrating distributed micro-sources into large power grids has become a research hotspot. As an effective carrier of distributed micro-sources, microgrids contain various forms of micro-sources, energy storage transposition and energy conversion devices. Generally, the cost characteristics of different forms of micro-source power generation in the microgrid are different. From the perspective of economy, the micro-source with low power generation cost should generate more power, and vice versa. Therefore, the micro-sources in the micro-grid should work in the economic operation mode. [0003] The economic operation control methods of microgrid can be di...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/48H02J3/00
CPCH02J3/38H02J3/48H02J3/0075H02J2203/10H02J2203/20H02J2310/64Y02P80/14
Inventor 李浪田鹏沈仕巡刘赟周克冯华仲
Owner MOUTAI INST
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