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Multi-time scale AC-DC distribution network dispatching method and device

A technology with multiple time scales and scheduling methods, applied in a single AC network with different frequencies, parallel feeding arrangements for a single network, etc. The effect of stability, improving absorption capacity and reducing operating energy consumption

Active Publication Date: 2021-02-05
XUJI GRP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-time scale AC-DC distribution network scheduling method and device to solve the problem that the existing technology cannot guarantee the reliable and stable operation of the AC-DC distribution network including AA-CAES energy storage devices

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  • Multi-time scale AC-DC distribution network dispatching method and device
  • Multi-time scale AC-DC distribution network dispatching method and device
  • Multi-time scale AC-DC distribution network dispatching method and device

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Embodiment Construction

[0044] Embodiment of multi-time scale AC and DC distribution network dispatching method:

[0045] The multi-time scale AC / DC distribution network scheduling method proposed in this embodiment is based on the following figure 1 The simplified AC-DC power distribution system (i.e. AC-DC distribution network) is shown. The AC-DC distribution network includes DC distribution network, AC distribution network and VSC converter station; the DC distribution network includes photovoltaic power distribution and DC Load, the AC distribution network includes gas turbines, AA-CAES devices and AC loads, where TG is gas turbines, PV is photovoltaics, and CAES is AA-CAES devices, that is, compressed air energy storage, and it is assumed that both AC and DC loads can participate in IDR ( Incentive Demand Response).

[0046] The multi-time scale AC / DC distribution network scheduling method includes the following steps:

[0047] established as figure 2 The dual-time-scale dispatching model s...

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Abstract

The invention relates to a multi-time scale AC-DC distribution network scheduling method and device, belonging to the technical field of AC-DC distribution network scheduling. The method includes: establishing a dual-time-scale dispatching model, including a day-ahead dispatching model and a real-time dispatching model, obtaining short-term forecast values ​​and ultra-short-term forecast values ​​of photovoltaic and flexible loads; inputting short-term forecast values ​​of photovoltaics and flexible loads into the day-ahead dispatching model, Obtain the day-ahead scheduling results of the start-stop status of the gas turbine, the operating conditions of the AA-CAES device, and the scheduling plan of the flexible load, and input the day-ahead scheduling results and ultra-short-term forecast values ​​of photovoltaics and flexible loads into the real-time scheduling model to obtain real-time scheduling results. The AC and DC distribution network is dispatched through real-time dispatch results. The invention improves the flexibility and stability of the system operation, improves the renewable energy consumption capacity of the system, reduces the energy consumption of the system operation, and provides guidance for the safe, stable and economical operation of the power grid.

Description

technical field [0001] The invention relates to a multi-time scale AC-DC distribution network scheduling method and device, belonging to the technical field of AC-DC distribution network scheduling. Background technique [0002] Compared with the traditional distribution network, directly connecting photovoltaics to the DC side through the DC distribution network will save a lot of commutation links and improve energy utilization; in addition, the converter station can flexibly provide reactive power support and coordinate the reactive power of the converter station. Power compensation can ensure the safe operation of power distribution system. [0003] In recent years, due to the consideration of advanced adiabatic compressed air energy storage (AA-CAES) for energy storage devices, AA-CAES has the advantages of large capacity, long life, no pollution, and low cost. One of the most potential physical energy storage technologies at present has attracted extensive attention f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/02H02J3/46
CPCH02J3/02H02J3/46
Inventor 王志成翟登辉史善哲许丹张彦龙
Owner XUJI GRP