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Power and frequency regulation control method for photovoltaic energy storage power station

A control method, automatic power generation control technology, applied in the electric power field, can solve the problems of not considering the automatic power generation control, the whole station transformer and line loss, etc., and achieve the effect of fast frequency modulation and strong practicability

Pending Publication Date: 2021-06-08
XUJI GRP +4
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Problems solved by technology

At present, there are few studies on the frequency regulation strategy of photovoltaic energy storage power stations. The published patent is a control method and device for photovoltaic power generation to participate in energy storage coordination and participation in primary frequency regulation of the power grid (application number: 202010101596.X). The technical solution protected by this patent has no Considering the combination of automatic generation control (AGC) dispatching instructions and frequency modulation control instructions, another aspect does not consider the factors of transformer and line loss in the whole station

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  • Power and frequency regulation control method for photovoltaic energy storage power station

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0045] figure 1 A system electrical schematic diagram of a photovoltaic energy storage power station is shown. from figure 1 It can be seen that the photovoltaic energy storage power station includes a photovoltaic accumulation area a and an energy storage accumulation area b. The photovoltaic accumulation area a includes several parallel centralized grid-connected inverters. Each centralized grid-connected inverter is ...

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Abstract

The invention discloses a power and frequency regulation control method for a photovoltaic energy storage power station, a power and frequency regulation controller of the photovoltaic energy storage power station has an AGC function and a rapid frequency regulation function, and the power and frequency regulation controller directly collects the voltage and current of a grid-connected point and calculates the frequency and power of the grid-connected point in real time, and quickly issues a power and frequency regulation instruction to each photovoltaic inverter and each energy storage converter through a quick communication GOOSE mechanism. Based on the power generation loss of the whole station, according to the frequency change of the grid-connected point, the AGC scheduling instruction is combined, the stress of the whole station is calculated, the rapid frequency modulation effect is good, and the practicability is high.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a control method for power regulation and frequency regulation of a photovoltaic energy storage power station. Background technique [0002] According to the development needs of the national renewable energy strategy, photovoltaic power plants have been widely used at present, and the power grid has gradually changed from conventional thermal power generation to wind, solar renewable energy and conventional thermal power. In view of photovoltaic, wind power and other power The inertia and damping of electronic power stations are very small, which weakens the anti-disturbance ability of the entire power grid. After a large active power disturbance occurs in the grid, the grid frequency will quickly deviate from 50Hz. Within 2 seconds, neither the primary frequency modulation of hydropower, thermal power, nuclear power units nor the secondary frequency modulation of the power grid c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/48H02J3/24H02J3/32
CPCH02J3/466H02J3/48H02J3/241H02J3/32H02J2300/24Y02E70/30Y02E10/56
Inventor 王卫星李献伟李华张鹏远张鹏袁方方王坤徐军王毅
Owner XUJI GRP
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