Photovoltaic reverse power control and protection system

A technology of control protection and control system, applied in the direction of photovoltaic power generation, single grid parallel feeding arrangement, etc., to achieve the effect of preventing reverse flow and reverse power transmission

Inactive Publication Date: 2011-06-15
ZHUHAI SINGYES RENEWABLE ENERGY TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the electricity generated by the photovoltaic system cannot be consumed in a timely manner, and the problem of reverse current transmission into the public gri

Method used

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  • Photovoltaic reverse power control and protection system
  • Photovoltaic reverse power control and protection system
  • Photovoltaic reverse power control and protection system

Examples

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Embodiment Construction

[0012] specific implementation plan

[0013] The reverse power collector is installed at the interface between the public grid and the user-side load to monitor the voltage, current, direction and power of the public grid-side and user-side load in real time.

[0014] The photovoltaic reverse power control and protection system has two functional modes: full control and single control. Full control means that when reverse power occurs in any of the three phases, it cuts off the grid-connected operation of all three-phase subsystems, and then detects the load power for intelligent matching. Each sub-generating system is put into operation; single control means that when a reverse power occurs in one of the three phases, all sub-generating systems of this phase are cut off, and the load power is detected at the same time, and each sub-generating system is intelligently matched and put into operation.

[0015] Photovoltaic reverse power controller has two function options of auto...

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PUM

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Abstract

The invention provides a photovoltaic reverse power control and protection system which is applied to a solar photovoltaic power generation system. On the current market, the existing reverse relay protector only can control the reverse power in a certain range. The reverse power control and protection system comprises a reverse power collector, a reverse power monitoring system and a reverse power control system, wherein the reverse power collector is used for collecting the information of a photovoltaic power generation system and the information of a load in real time, and transmitting the information to the monitoring system in real time to be processed; and the reverse power controller is used for receiving the instruction output signal of the monitoring system to control the operation of the photovoltaic power generation system. When the photovoltaic power generation system has reverse current which is transferred into a public supply network, all sub-power generation systems of the photovoltaic power generation system are immediately cut off to be combined to the grid, and the power consumption of the public supply network and the power consumption of the load are collected simultaneously, so that each photovoltaic subsystem intelligently puts into an operation state or a halted state to be automatically matched with the load at the user side. In the drawing, part 1 is the reverse power collector, part 2 is the reverse power monitoring system, and part 3 is the reverse power control system.

Description

Technical field [0001] The invention relates to a photovoltaic reverse power control and protection technology, which is applied to a solar photovoltaic power generation system. Background technique [0002] At present, the rapid development of the domestic solar photovoltaic power generation market has put forward new requirements and challenges for solar photovoltaic power generation systems. In order to protect the safety and stability of the public power grid, most of the grid-connected solar photovoltaic power generation systems are required to be non-reverse current systems. In order to ensure that the photovoltaic power generation system does not send power back into the public grid, the photovoltaic power generation system must have an anti-backflow control protection device. Most of the current market uses anti-backflow relay protection. This device cannot avoid the phenomenon of reverse power at all. The reverse power is controlled within a certain range, and there...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/563Y02E10/56
Inventor 尹平柳宇甡钟国永
Owner ZHUHAI SINGYES RENEWABLE ENERGY TECH
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