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Energy storage capacity planning method for new energy station out-of-plan power auxiliary control

A technology for energy storage capacity and auxiliary control, which is applied to AC network circuits, flexible AC transmission systems, circuit devices, etc., can solve the problems of not fully considering the BESS deviation correction amount charging and discharging mileage, unfavorable BESS precise configuration, etc., to improve the comprehensive Investment benefits, improved tracking accuracy, and strong adaptability

Pending Publication Date: 2021-11-09
HARBIN INST OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this method does not fully consider the influence of curve characteristics on the possible deviation correction amount of BESS and the charging and discharging mileage that must be paid, which is not conducive to the precise configuration of BESS

Method used

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  • Energy storage capacity planning method for new energy station out-of-plan power auxiliary control
  • Energy storage capacity planning method for new energy station out-of-plan power auxiliary control
  • Energy storage capacity planning method for new energy station out-of-plan power auxiliary control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0188] Based on the 2015-2019 actual power curve and the planned curve of the EirGird system in Northern Ireland, a wind farm with an installed capacity of 100MW is simulated (the original curve characteristics are retained).

[0189] Step 1. Extract the characteristic indicators of the unplanned power curve of the wind farm

[0190] Set positive and negative deviation assessment coefficient R up , R dn =0.1, BESS reference capacity E bas = 10MWh, wind farm reference capacity S bas = 100MW. Table 2 gives the short-period time window T w = ΔP calculated at 4h sta and

[0191] Table 2 Calculation results of curve characteristic indicators of wind farms in each year

[0192]

[0193] When extracting curve characteristic indicators for the same wind farm, the parameter E bas , S bas , R up , R dn and T w Affects ΔP sta and Calculation results. Among them, the first 4 parameters are fixed boundary conditions, only T W is the variable to be decided.

[0194] S...

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Abstract

The invention discloses an energy storage capacity planning method for new energy station out-of-plan power auxiliary control, and the method comprises the steps of extracting curve feature indexes from the two aspects of out-of-plan power amplitude and deviation autoregression degree based on an RNES plan default event set; establishing a model reflecting the mapping relation among the curve characteristic indexes, the BESS capacity and the RNES deviation correction value / BESS charging and discharging mileage by combining the trend relation among the curve characteristic indexes, the BESS capacity and the RNES deviation correction value / BESS charging and discharging mileage; analyzing the deviation autoregression characteristic of an RNES out-of-plan power curve, setting an SOC base point of the BESS, selecting a proper SOC regression period to reduce the invalid charging and discharging mileage of the BESS, so that the potential of the limited capacity BESS for assisting in controlling the RNES out-of-plan power is improved. According to the method, the configuration capacity of the BESS can be differentially planned for the RNES with different curve characteristics, and the purpose of improving the BESS investment benefit on the basis of improving the power generation plan tracking precision technical performance can be achieved.

Description

technical field [0001] The invention belongs to the technical field of power system planning and operation, and relates to an energy storage capacity planning method for unplanned power auxiliary control of new energy stations, in particular to an autoregressive characteristic and autoregressive method based on the positive / negative deviation of the RNES unplanned power curve The BESS capacity planning method with cycle as the main measurement standard. Background technique [0002] The output power prediction accuracy of renewable new energy stations (RNES) such as wind and solar is low, and it is easy to cause a large deviation in the actual power curve relative to the current plan. In order to assist in controlling the unplanned power of RNES and the resulting high default power, it is necessary to configure a moderate-scale battery energy storage system (Battery Energy Storage System, BESS) on the RNES side to improve the tracking accuracy of power generation plans. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32H02J3/38H02J2203/20Y02E40/10
Inventor 曹明浩于继来
Owner HARBIN INST OF TECH