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Management method for connecting distributed power supplies and micro grid to main power grid

A technology of distributed power supply and management method, which is applied in the field of management of distributed power supply and micro-grid connected to the main power grid, can solve problems such as difficult completion of power generation prediction model, difficulty in main power grid operation scheduling, difficulty in energy comprehensive optimization, etc., to achieve The effect of reducing power generation costs, improving power supply reliability, and optimizing power output

Active Publication Date: 2014-10-29
SICHUAN ZHONGDIAN AOSTAR INFORMATION TECHNOLOGIES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the intermittent and random nature of the output of the photovoltaic system, it is difficult to complete the power generation prediction model, and the charge and discharge management of the energy storage unit is also a complex planning problem involving multiple time periods. In addition, the current distributed power supply and microgrid cannot form a unified A set of effective operation rules, automatic exit after system failure, difficulty in energy comprehensive optimization, indirect impact on the surrounding environment, difficulty in scheduling the operation of the main power grid

Method used

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  • Management method for connecting distributed power supplies and micro grid to main power grid
  • Management method for connecting distributed power supplies and micro grid to main power grid
  • Management method for connecting distributed power supplies and micro grid to main power grid

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Embodiment 1

[0033] Management methods for connecting distributed power sources and microgrids to the main grid, such as figure 1 , figure 2 shown, including the following steps:

[0034] Step A, power grid demand response or daily dispatch: the main grid issues power supply demand or daily dispatch work to form a demand response;

[0035] Step B. Response to demand: The formed demand response is published to the micro-grid, and the micro-grid responds to the demand;

[0036]Step C, strategy formulation: simulate the microgrid system, first adjust the equipment parameters of each micropower system in the microgrid, such as the stator equipment, inverter equipment, and frequency converter equipment of the synchronous power generation system, such as the photovoltaic power generation system. Equipment parameters such as battery panels and inverters are adjusted, and then according to the parameter adjustment value, it corresponds to the parameter impact table, and combined with the weathe...

Embodiment 2

[0044] This embodiment is further optimized on the basis of the above embodiments, such as figure 1 , figure 2 , image 3 , Figure 4 As shown, step A, power grid demand response or daily dispatch: the main power grid issues power supply demand or daily dispatch work to form a demand response;

[0045] Step B. Response to demand: The formed demand response is published to the micro-grid, and the micro-grid responds to the demand;

[0046] Step C, strategy formulation: Simulate the micro-grid system, collect variable parameters such as component temperature, ambient temperature, irradiance, and wind speed, and collect fixed parameters including micro-power equipment, and use programs to arrange and combine them to form a parameter impact table. In each micro-power system of the micro-grid, such as the stator equipment, inverter equipment, and frequency converter equipment of the synchronous power generation system, the equipment parameters are adjusted, and equipment parame...

Embodiment 3

[0052] This embodiment is further optimized on the basis of the above embodiments, such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, further, in order to better realize the present invention, the strategy formulation is divided into manual mode strategy and automatic mode strategy. Under the manual mode strategy, the microgrid system is subjectively configured by the operator, that is, the subjective setting strategy, So as to form a strategy, and then save and execute the strategy; under the automatic mode strategy of the micro-grid system, the micro-grid system automatically detects the dynamic library according to the temperature, wind direction, radiation and other weather environment information, performs similar matching of parameter values, and automatically adjusts each micro-grid Configure equipment parameters to form a strategy to make the microgrid system operate in the optimal mode. Through the environmental collection data such as ambien...

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Abstract

The invention discloses a management method for connecting distributed power supplies and a micro grid to a main power grid. The management method comprises the steps of power grid demand response or daily scheduling; response to demands; strategy making which comprises the steps of simulating a simulation micro grid system, performing parameter adjustment of each micro power supply device of the micro grid, responding to a parameter influence table according to a parameter adjustment value, obtaining power generation prediction according to a matching algorithm, obtaining economic benefit brought by parameter adjustment by combination with information such as electricity price, adjusting parameters according to results, finally obtaining a reasonable maximum benefit model, and forming a corresponding strategy; scheduling process approval; and strategy execution. The demand response, a scheduling process and a micro grid strategy form a closed loop, power supply reliability is improved, the uniform scheduling process during power grid demand response execution at power utilization rush hours is solved, stability and controllability of power transmission between the distributed power supplies and the micro grid and between the micro grid and the main power grid and coordinated control between a plurality of distributed power supplies are guaranteed, and united strategy control is performed on integral running of the micro grid.

Description

technical field [0001] The invention relates to the field of coordinated management of a main power grid, a micro-grid, and a distributed power supply, and specifically, a management method for connecting a distributed power supply and a micro-grid to a main power grid. Background technique [0002] At present, the research on micro-grid operation strategy control in the world is mainly focused on the inverter interface of the micro-power supply. The control strategies for this interface mainly include constant power control, droop control, and constant voltage and constant frequency control. The domestic research on the control strategy of the micro-grid is mainly to control the output power of the micro-power supply, and the control of the power electronic interface mainly refers to the control of the DC / AC inverter link. There are two direct control targets for studying the inverter interface: control the output voltage amplitude and frequency; control the output current ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/28G06Q10/04G06Q50/06
CPCH02J3/38
Inventor 黄荣辉罗华永黄璞张捷沈磊付世峻孙梦朱海萍何灵慧
Owner SICHUAN ZHONGDIAN AOSTAR INFORMATION TECHNOLOGIES CO LTD
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