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Energy storage photovoltaic consumption and auxiliary peak regulation coordination control method

A technology of coordinated control and energy storage, applied in the direction of AC network load balancing, AC network circuits, electrical components, etc., can solve the problems of inability to adapt to multiple application scenarios, low energy storage utilization hours, etc., to increase utilization hours, improve positive effect

Pending Publication Date: 2022-06-24
HUBEI ELECTRIC ENG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] From 2020 to 2030, the total installed capacity of wind power and solar power in my country will reach more than 1.2 billion kilowatts, and the output of new energy is random and intermittent, which poses a severe challenge to the flexibility of the power grid.
, but the existing research on energy storage control strategies mostly focuses on the optimization of a single application scenario, such as peak shaving and valley filling, frequency modulation, and stabilization of new energy output, etc., and does not involve coordinated control methods between multiple application scenarios. The proposed The control strategy cannot adapt to the multi-application scenarios in which energy storage is deployed in the new situation and simultaneously participates in the consumption of curtailed light and auxiliary services for peak regulation, and the utilization hours of energy storage are low.

Method used

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  • Energy storage photovoltaic consumption and auxiliary peak regulation coordination control method
  • Energy storage photovoltaic consumption and auxiliary peak regulation coordination control method
  • Energy storage photovoltaic consumption and auxiliary peak regulation coordination control method

Examples

Experimental program
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Embodiment 1

[0070] figure 1 , 2 A preferred embodiment of the present application is shown ( figure 1 A schematic structural diagram of a coordinated control method for energy storage photovoltaic consumption and auxiliary peak shaving provided by the first embodiment of the present application is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows :

[0071] The method includes the following steps:

[0072] Step 1: Obtain the actual output data and theoretical maximum output data of the photovoltaic power station on a typical day, and determine the abandonment time period and the abandonment curve.

[0073] By collecting the actual daily output curve and theoretical maximum output curve of the actual photovoltaic power station, the abandoned light curve of the photovoltaic power station can be obtained, as shown in the following formula:

[0074]

[0075] in, is the theoretical PV output value at time t, ...

Embodiment 2

[0114] Taking the data of an actual photovoltaic power station as an example, the validity and rationality of the evaluation method proposed in the present invention are verified.

[0115] In the embodiment, the maximum power of the photovoltaic power station is 20MW, and the peak load is 49.5MW. The energy storage battery has a capacity of 12MWh and a maximum charge and discharge power of 3MW.

[0116] The curtailment curve of the photovoltaic power station and the load curve of the system can be found in Figure 7 , 8 . The initial light rejection rate is 12.84%, the peak-valley difference is 13.65MW, and the peak-valley difference rate is 27.57%. The iteration step size ΔP was set to 0.01MW.

[0117] 1), the results of the example

[0118] Get P according to the discard strategy c =0.51MW, at this time, the energy storage, consumption and abandonment period is 10:00-14:00, and the total charging capacity is 5.8MWh. See the comparison of abandoned light before and aft...

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Abstract

The invention relates to the technical field of energy storage regulation and control, in particular to an energy storage photovoltaic absorption and auxiliary peak regulation coordination control method. Acquiring actual output data and theoretical maximum output data of a typical day of the photovoltaic power station, and determining a light abandoning time period and a light abandoning curve; obtaining an energy storage charging time period according to the light abandoning curve, and executing an energy storage consumption control strategy in the light abandoning time period to obtain charging power; acquiring a daily load curve of the node system, and correcting a peak regulation time period and an energy storage capacity initial value of the load curve according to the energy storage charging time period and the charging power; according to the load curve after the peak regulation time period is corrected, the time period and the charging and discharging power of energy storage participating in auxiliary peak regulation are determined; and according to the light abandoning time period, the auxiliary peak regulation time period, the charging power of the stored energy in the light abandoning time period and the charging / discharging power of the auxiliary peak regulation time period, carrying out energy storage all-day charging and discharging control. While the requirement for the light abandoning rate is met, the energy storage utilization hours can be increased, and the application scenarios of light abandoning consumption and auxiliary peak regulation can be met at the same time.

Description

technical field [0001] The invention relates to the technical field of energy storage regulation, in particular to a coordinated control method for energy storage photovoltaic consumption and auxiliary peak regulation. Background technique [0002] From 2020 to 2030, the total installed capacity of wind power and solar power in my country will reach more than 1.2 billion kilowatts, and the output of new energy is random and intermittent, which poses a serious challenge to the flexibility of the power grid. Due to the energy time-space transfer function of energy storage technology, it can effectively suppress the fluctuation of new energy power and greatly improve the consumption rate of new energy. The development model of new energy + energy storage has become a consensus in the industry. Various provinces in my country have also successively introduced policies related to the construction of energy storage for new energy stations, and many places require the deployment of...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/32
CPCH02J3/466H02J3/32H02J2203/10
Inventor 赵璐邓少平巩晋通范黎李园林陈红坤高鹏杨鑫源张哲原肖厦颖
Owner HUBEI ELECTRIC ENG CORP