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Multi-photovoltaic solar-diesel hybrid system coordination control method based on disturbance observer

A disturbance observer and hybrid system technology, applied in the direction of total factory control, total factory control, electrical program control, etc., can solve problems such as photovoltaic system active power output fluctuations, frequency deviation, etc.

Inactive Publication Date: 2013-04-03
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0016] The present invention is aimed at the independent operation of multi-photovoltaic hybrid system, in order to reduce the inconsistent output of each photovoltaic system caused by different lighting angles and capacities, so that the active power output of the photovoltaic system fluctuates and generates large fluctuations. In order to solve the problem of frequency deviation, a coordinated control method for multi-photovoltaic photovoltaic and diesel hybrid systems based on disturbance observers is proposed. The disturbance observer is used to estimate the load value in the system, thereby calculating the change value of the load, and applying the change value of the load to the To solve the problem of frequency deviation in the setting of photovoltaic output power reference value

Method used

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  • Multi-photovoltaic solar-diesel hybrid system coordination control method based on disturbance observer
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  • Multi-photovoltaic solar-diesel hybrid system coordination control method based on disturbance observer

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Embodiment Construction

[0060] In the following, the present invention will be further described from the aspects of model establishment, design principle, design method, and validity verification.

[0061] (1) The mathematical model of the independent operation of the hybrid solar-diesel system considering multi-photovoltaic access:

[0062] The independent photovoltaic and diesel hybrid power system mainly includes photovoltaic power generation system and diesel engine system. The structural block diagram and dynamic model of the system are as follows: figure 1 , figure 2 shown.

[0063] The solar cell module is of great significance to the design of the inverter and control system, and its equivalent circuit is as follows image 3 shown. Conventional I-V characteristics of solar cell modules, saturation current of solar cell modules With the change of temperature, the internal resistance current of the photovoltaic cell can be expressed by the following formula:

[0064]

[0065]

[...

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Abstract

The invention relates to a multi-photovoltaic solar-diesel hybrid system coordination control method based on a disturbance observer. A solar-diesel hybrid system comprises a diesel power generation system and a multi-photovoltaic system which contains a center reference command and a local reference command, a loading value in the system is estimated by the disturbance observer, changed values of loads in a hybrid power system are applied to setting of output power reference values of various photovoltaic systems, the photovoltaic output power can be timely adjusted according to changes of the loads, and frequency deviation can be reduced. Effects of the method are compared with those of a multi-photovoltaic power supply system with photovoltaic systems which are not coordinated and totally use maximum power to perform tracing control, a simulation result proves that the method can reduce the frequency deviation of the solar-diesel hybrid system, and each photovoltaic system can obtain high power output.

Description

technical field [0001] The invention relates to a control technology of a photovoltaic and diesel hybrid system, in particular to a coordinated control method for a multi-photovoltaic photovoltaic and diesel hybrid system based on an interference observer. Background technique [0002] Photovoltaic new energy has attracted more and more people's attention due to its advantages of no pollution, no noise, inexhaustible supply, etc. [1-2]. The light-diesel hybrid power supply system [3] is an important way to solve the power consumption in remote areas of our country. Because photovoltaic new energy is affected by weather changes, its output power has the characteristics of volatility, randomness, and intermittency, especially when multiple photovoltaic systems and diesel power generation systems are jointly powered, the fluctuation of power output and the continuous change of load in the system It may cause active power imbalance and large frequency deviation of the hybrid po...

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 米阳符杨赵晋斌韩云昊包晓炜
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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