Photovoltaic power generation energy control system and control method of Internet of Things based on GA-SVM modulation

A GA-SVM and photovoltaic power generation technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve problems such as voltage distribution imbalance, harmonic content loss, and long time consumption, and achieve power imbalance and power oscillation, Effect of eliminating harmonic current compensation and shortening calculation time

Pending Publication Date: 2022-05-10
ZHEJIANG CHINT INSTR & METER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the embodiment of the present invention is to provide a GA-SVM modulation-based Internet of Things photovoltaic power generation energy control system and control method to solve the power imbalance, voltage distribution imbalance, and shock caused by imbalance at the public coupling point of the current smart grid Faults, voltage sags and swells, and power oscillations; when nonlinear loads are applied to the system with many voltage and current sensors and electronic choke coils in the existing smart grid, the power supply current tends to be non-sinusoidal and has significant harmonic content The problem of loss and damage to electric energy, the existing PI control, PQ control and droop control take a long time; the power generation system has low power generation efficiency and large power consumption; the existing electricity meter, the Internet of Things, and the island connection problem of the smart grid

Method used

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  • Photovoltaic power generation energy control system and control method of Internet of Things based on GA-SVM modulation
  • Photovoltaic power generation energy control system and control method of Internet of Things based on GA-SVM modulation
  • Photovoltaic power generation energy control system and control method of Internet of Things based on GA-SVM modulation

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Embodiment 1

[0130] The Internet of Things photovoltaic power generation control system based on GA-SVM modulation in the embodiment of the present invention, such as figure 1 shown, including:

[0131] The first current modulation module is used to sample the three-phase current I of the output terminal of the inverter, that is, current sampling 1 a , I b , I c Modulate, output the first reference current I α2 , I β2 , I 03 , the current sampling 1 can use a current sensor, and the first current modulation module includes:

[0132] Current feedback device, the input of the current feedback device is the three-phase current I a , I b , I c , the output is the input of the zero-order keeper ZOH, which is used to eliminate the error caused by the transmission cable / optical cable;

[0133] The zero-order keeper ZOH, the input of the zero-order keeper ZOH is the output of the current feedback device, and the output of the zero-order keeper ZOH is the input of the positive and negative...

Embodiment 2

[0187]The embodiment of the present invention provides a method for controlling photovoltaic power generation of the Internet of Things based on GA-SVM modulation, using the photovoltaic power generation control system of the Internet of Things based on GA-SVM modulation described in Embodiment 2, and proceeding according to the following steps:

[0188] Step S1, setting parameters for the first current modulation module, the second current modulation module, the PR controller and the notch filter;

[0189] Step S2, receiving the three-phase voltage V at the common point of the smart grid pcc , The three-phase current I at the common point of the smart grid pcc , The three-phase current I at the output terminal of the inverter a , I b , I c , and the photovoltaic cell DC output voltage V dc ;

[0190] Step S3, acquiring and judging whether to generate the first reference current I in real time α2 , I β2 , I 03 and / or a second reference current According to the firs...

Embodiment 3

[0308] An embodiment of the present invention provides a smart grid power generation metering monitoring controller, such as figure 1 shown, including:

[0309] The electric energy metering module is used to perform electric energy metering according to the three-phase voltage Vpcc at the common point detected by the voltage sensor at voltage sampling 0 and the three-phase current Ipcc at the common point detected by the current sensor;

[0310] The IoT parameter power monitoring module is used for IoT parameter and power monitoring, and is connected with the monitoring / computer control device;

[0311] Converter grid hardware configuration module, used to access the Internet of Things, three-phase current, three-phase current (three-phase direct current), and access to micro-processing through access middleware (wireless communication module, such as node control unit wireless Internet access adapter) The Internet of Things and the load are connected through middleware, and ...

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Abstract

The invention discloses an Internet of Things photovoltaic power generation control system and method based on GA-SVM modulation, and the method comprises the steps: carrying out the parameter setting of a first current modulation module, a second current modulation module, a PR controller and a notch filter, and receiving the voltage and current of a common point of a smart power grid, the three-phase current of an output end of an inverter, and the DC output voltage of a photovoltaic cell; acquiring and judging whether to generate a first reference current and/or a second reference current in real time, and determining one of the first current modulation module and the second current modulation module with the optimal response speed; if the response speed of the second current modulation module is optimal, corresponding switching is carried out, so that a connecting line between the second current modulation module and the SVM wave sending module is switched on, and voltage Va, Vb and V0 are obtained through conversion of second reference current; otherwise, converting the first reference current to obtain voltages Va, Vb and V0; and based on SVM wave generation, the inverter is controlled to work, the response speed is high, and the power generation efficiency is high.

Description

technical field [0001] The invention belongs to the field of Internet of Things and smart grid power transmission and distribution, and relates to an Internet of Things photovoltaic power generation energy control system and control method based on GA-SVM modulation. Background technique [0002] As the basic unit of the Global Energy Internet, the smart grid is connected to the existing traditional power grid on a large scale with renewable energy sources such as photovoltaics, wind energy, biomass energy and tides, fuel cells, and geothermal energy. The power distribution system has high reactance ratio and unbalanced load. curve. Introducing various AC and DC monitoring devices, electric energy metering of electronic meters into the power distribution system, numerous voltage and current sensors and electronic choke coils used in smart grids and the Internet of Things, when nonlinear loads are applied to the system, the power supply current tends to Non-sinusoidal with s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/00H02J3/01H02J3/12H02J3/16H02J3/18H02J3/24H02M1/12H02M1/32H02M7/48H02M7/5387
CPCH02J3/38H02J3/381H02J3/00H02J3/002H02J3/24H02J3/01H02J3/12H02J3/16H02J3/1821H02M7/48H02M7/53873H02M1/32H02M1/12H02M1/126H02J2300/24H02J2300/26
Inventor 顾章平黄和平黄蕾冯学礼吴斌郑建陈晓琳
Owner ZHEJIANG CHINT INSTR & METER
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