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PCC point zero power control method, system and device

A control method and control system technology, applied in the field of distribution network, can solve problems such as power fluctuations, achieve the effects of improving quality, solving power fluctuations, and reducing waste of electric energy

Inactive Publication Date: 2018-05-15
SHENZHEN SOFAR SOLAR
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Problems solved by technology

[0003] The invention provides a PCC point zero-power control method, system and device, which realizes the zero-power output at the PCC point (Common Connection Point: Point of Common Coupling) of the photovoltaic microgrid through the energy storage device, and solves the problem of the PCC point of the photovoltaic microgrid. The problem of power fluctuation at the place, reducing the waste of electric energy and improving the quality of the distribution network

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[0040] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0041] Such as Figure 1 to Figure 6 As shown, the embodiments of the present disclosure provide a PCC point zero power control method, system, and device. The zero power output at the PCC point of the photovoltaic microgrid is realized through the energy storage device, and the power fluctuation at the PCC point of the photovoltaic microgrid is solved. The problem of reducing power waste and improving the quality of the distribution network. Such as figure 1 and Image 6 As shown, the method includes steps S10-S30:

[0042] In step S10, the direction of the power flow of the PCC point 10 is de...

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Abstract

The invention relates to a PCC point zero power control method, system and device. The method includes the following steps: judging the power flow direction of a PCC point according to a collected current signal of the PCC point; making an energy storage device switched to a charging or discharging mode according to the power flow direction of the PCC point; and making the energy storage device compensate the power of the PCC point in real time to enable the PCC point to realize zero power output. According to the invention, the current signal at the PCC point is collected in real time, the output of the energy storage device is calculated according to the current signal, the power of the PCC point is compensated in real time, and thus, zero power output at the PCC point is realized. By introducing the energy storage device to make real-time compensation for the PCC point and realize zero power output at the PCC point, the problem of power fluctuation at the PCC point is solved, the waste of electric energy is reduced, and the quality of the distribution network is improved.

Description

【Technical Field】 [0001] The invention relates to the field of power distribution networks, in particular to a PCC point zero power control method, system and device. 【Background technique】 [0002] Photovoltaic power generation, as an important form of solar energy utilization, has set off a climax of application worldwide as the use cost drops. In recent years, my country has also issued a series of policies to support the promotion of photovoltaic power generation. However, in the process of large-scale access to photovoltaic power generation, power quality problems such as harmonics and flicker have been caused. The above problems will have a certain impact on the safe operation of the distribution network. At the same time, photovoltaic power generation itself has the characteristics of intermittent and random nature, making it impossible for the distribution network to quickly and effectively regulate it. At the beginning of the 21st century, scholars proposed the concept...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32H02J3/383Y02E10/56
Inventor 易德刚陈健聪肖荣
Owner SHENZHEN SOFAR SOLAR
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