Energy control method and control system for optical storage and charging system

A technology of energy control and solar storage, which is applied in the direction of AC network with energy trade/energy transmission authority, photovoltaic power generation, energy storage, etc., and can solve the problems of not considering the power grid time period, unfavorable power grid stability, etc.

Inactive Publication Date: 2019-01-11
STATE GRID QINGHAI ELECTRIC POWER +4
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an energy control method for an optical storage and charging system to solve the problem that the traditional energy control method does not consider the time period of the power grid, which is not conducive to the stability of the powe...

Method used

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  • Energy control method and control system for optical storage and charging system
  • Energy control method and control system for optical storage and charging system
  • Energy control method and control system for optical storage and charging system

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Embodiment Construction

[0028] Embodiment of Energy Control Method for Photovoltaic Storage and Charging System

[0029] In this embodiment, the load units in the optical storage fast charging station include charging piles, and may also include other load devices. In this embodiment, the optical storage fast charging station is a small optical storage fast charging station with an energy storage capacity of 50kW / 100kWh to 500kW / 1MWh, a photovoltaic installed power of 10kW to 50kW, and a charging pile load of 100kW to 500kW connected to a 380V system. .

[0030] The energy control strategy of the optical storage fast charging station includes the following implementation steps:

[0031] Step 1: Determine if figure 1 The grid-connected solar-storage fast-charging stations are running normally, the voltage and frequency of the grid-connected point are normal, and it is ensured that the grid-connected active power value can be obtained.

[0032] Step 2: Initialize relevant parameters, including: acti...

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Abstract

The invention relates to an energy control method and a control system of a optical storage and charging system. When a power grid is in a peak period, if the photovoltaic power is greater than the load power, the excess power is used for charging the energy storage unit. If the photovoltaic power is less than the load power, controlling the discharge of the energy storage unit to supplement the required power; If the photovoltaic power is greater than the load power, the excess power is used to charge the energy storage unit when the power grid is in the normal period. If the photovoltaic power is less than the load power, the energy storage unit is controlled not to discharge, and all the power required is provided by the power grid. The energy control method provided by the invention fully utilizes the optical storage coordination control and reasonably cooperates with the commercial power, so that the electric energy in the energy storage unit is used as much as possible during thepeak period, and the electric energy of the power grid is not used; In peacetime, the power in the grid is used as much as possible, and the power in the energy storage unit is not used, so as to achieve the balance of power consumption and maximize the income, and ensure the power supply requirements on the demand side.

Description

technical field [0001] The invention relates to an energy control method and a control system of an optical storage and charging system. Background technique [0002] At present, the "photovoltaic + energy storage + charging" model - the research and application of photovoltaic storage charging stations are getting more and more in-depth. Photovoltaic-storage charging stations can solve related problems caused by power distribution and capacity expansion in limited areas, and use the reasonable cooperation of photovoltaic power generation and energy storage to achieve a balance between power generation and power consumption in the local area, which can alleviate the impact of charging load on the power grid , It can also make full use of new energy to generate electricity, realize the green energy supply of charging stations, and maximize economic benefits. [0003] However, for small solar-storage fast-charging stations, due to restrictions on construction goals, regions, ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32H02J7/35H02J3/00
CPCH02J3/008H02J3/32H02J3/383H02J7/35Y02E10/56Y02E70/30
Inventor 马红伟李亚辉郭宝甫毛建容彭世康翟登辉张鹏孙锐鞠洪新赵江信王小凯李春来杨立滨
Owner STATE GRID QINGHAI ELECTRIC POWER
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