Self-organization power flow controlling method of photovoltaic power generator set suitable for power distribution network

A technology for photovoltaic generators and generator sets, which is applied in photovoltaic power generation, reducing/preventing power oscillations, and single-grid parallel feeding arrangements, etc., and can solve problems such as loss of active power support, voltage fluctuations, and transient stability problems in the distribution network.

Inactive Publication Date: 2014-11-19
ZHEJIANG UNIV
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Problems solved by technology

However, related stability and control issues make the connection of a large number of photovoltaic generators have a greater negative impact on the power system
In a distribution network with a high penetration rate of photovoltaic power generation and few energy storage devices, a sudden disturbance (such as a sudden chang

Method used

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  • Self-organization power flow controlling method of photovoltaic power generator set suitable for power distribution network
  • Self-organization power flow controlling method of photovoltaic power generator set suitable for power distribution network
  • Self-organization power flow controlling method of photovoltaic power generator set suitable for power distribution network

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specific Embodiment

[0069] exist Figure 4 The simulation experiment of the control method proposed by the present invention is carried out on the microgrid simulation example diagram shown. The simulation test parameters are shown in Table 1.

[0070] Table 1

[0071]

[0072] Set up simulation model in Matlab / Simulink, adopt the control method that the present invention proposes, gained simulation experiment data: after the short-circuit fault takes place, the recovery time of photovoltaic generator set is less than 10s; After the light intensity changes suddenly, the recovery time of photovoltaic generator set is less than 5s; communication failure It takes less than 20s for the photovoltaic generator set to recover and stabilize after the occurrence.

[0073] The screenshot of the experiment is as follows:

[0074] (1) Figure 5 , 6 It shows the change process of photovoltaic generator output active power, reactive power, key bus voltage and feeder 1 power when a short-circuit fault o...

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Abstract

The invention discloses a self-organization power flow controlling method of a photovoltaic power generator set suitable for a power distribution network. The self-organization power flow controlling method comprises the following steps: the photovoltaic power generator set is controlled; each photovoltaic power generator of the power distribution network is controlled through underlying controlling volumes and communication matrixes; the communication matrixes of a partial communication network are optimized to be complete sequences; the photovoltaic power generator set of the power distribution network is controlled through high-level controlling volumes. According to the invention, a plurality of photovoltaic power generators of the power distribution network can be stable and efficiently controlled under the condition of limit communication ability; active power outputted by the photovoltaic power generators is close to a set value; a system composed of the photovoltaic power generators can be improved in anti-interference; the self-organization power flow controlling method has the characteristic of redundancy in the time-variety and instantaneity of the partial communication network, and the smallest communication bandwidth can be realized.

Description

technical field [0001] The invention relates to a power flow control method of a photovoltaic generator set, in particular to a self-organized power flow control method of a photovoltaic generator set suitable for a distribution network. Background technique [0002] In recent years, the penetration rate of photovoltaic generators in the distribution network has gradually increased. However, the related stability and control problems make the connection of a large number of photovoltaic generators have a relatively large negative impact on the power system. In a distribution network with a high penetration rate of photovoltaic power generation and few energy storage devices, a sudden disturbance (such as a sudden change in illumination, etc.) will cause a rapid disconnection of the photovoltaic generator or a sudden drop in output power. It will cause the distribution network to lose active power support. The reduction of active power can cause problems such as voltage flu...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/38
CPCY02E10/56
Inventor 辛焕海董炜齐冬莲刘云张国月
Owner ZHEJIANG UNIV
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