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Demand side storage and charging system and method suitable for power distribution area

A power distribution station area, demand side technology, applied in electrical components, circuit devices, emergency power supply arrangements, etc., can solve the problems of low utilization rate of power assets, low power grid investment efficiency, long implementation period, etc., to reduce the load rate, The effect of improving the investment economy of power grid and reducing the risk of safe operation

Pending Publication Date: 2021-11-19
STATE GRID LIAONING ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the power quality control of power supply in low-voltage distribution stations, the traditional methods are mostly to install reactive power compensation devices, voltage regulation devices or balancing devices, etc. These methods can only be used to control a single power quality problem
For the power supply reliability guarantee of low-voltage distribution stations, the traditional method is to increase the power supply capacity margin by upgrading and expanding the station area or building a new station area. However, the implementation period of this method is long, and it is easy to cause problems such as low utilization rate of power assets and low investment efficiency of the power grid.

Method used

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  • Demand side storage and charging system and method suitable for power distribution area
  • Demand side storage and charging system and method suitable for power distribution area

Examples

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Effect test

Embodiment 1

[0045] The present invention is a demand-side storage and charging system suitable for distribution stations, and the system is suitable for 0.4kV distribution stations, such as figure 1 as shown, figure 1 It is a schematic structural diagram of a demand-side storage and charging system suitable for a distribution station area of ​​the present invention, that is, a demand-side storage and charging system for a 0.4kV station area, including a local intelligent monitoring module 1, an energy management module EMS2, a converter module PCS3, PLC controller 4, battery management system BMS5, storage and charge battery module 6, high-speed communication 7, Modbus TCP communication 8 and CAN communication bus 9.

[0046] Among them, the local intelligent monitoring module 1 is connected with the energy management module EMS2 through the high-speed communication bus 7, and the energy management module EMS2 is respectively connected with the converter module PCS3, the PLC controller 4,...

Embodiment 2

[0062] The present invention is a demand-side storage and charging method suitable for distribution stations, using a demand-side storage and charging system suitable for 0.4kV stations to manage and control demand-side power quality, such as figure 2 as shown, figure 2 It is a flow chart of the method of the present invention.

[0063] The method specifically includes the following steps:

[0064] Step 1: The system starts and runs;

[0065] Step 2: Enter the day-ahead plan operation mode by default;

[0066] Step 3: Real-time monitoring of the internal state of the energy storage system and the voltage and current values ​​at the load feeder PCC at the grid-connected point;

[0067] Step 4: According to the monitored voltage and current values ​​of the load feeder and based on the set operating control parameter thresholds, judge in real time whether the load rate of the substation exceeds the limit, whether there are power quality problems such as three-phase imbalance...

Embodiment 3

[0076] Based on the same inventive concept, the embodiment of the present invention also provides a computer storage medium.

[0077] A computer program is stored on the computer storage medium;

[0078] When the computer program is executed by the processor, the steps of the demand-side storage and charging method applicable to the distribution network area described in Embodiment 1 or 2 are realized.

[0079] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usabl...

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Abstract

The invention belongs to the technical field of electric energy quality management and control, particularly relates to a demand side storage and charging system and method suitable for a power distribution area, which are mainly suitable for a 0.4 kV power distribution area. The system comprises a local intelligent monitoring module, an energy management module EMS, a converter module PCS, a PLC, a battery management system BMS, a storage and charging battery module, a high-speed communication bus, a Modbus TCP communication bus and a CAN communication bus. The converter of the system has four-quadrant operation capability, active and reactive decoupling control can be realized, power flow distribution is optimized, and the power quality of a transformer area is improved. The power supply reliability can be improved, the peak load shifting effect is achieved, the load rate of the distribution transformer in the peak period is reduced, the safety operation risk of the distribution transformer is reduced, and the power utilization reliability and the power supply service capacity of the transformer area are improved. The problem of load supply blockage is relieved in a peak or peak load period, capacity expansion and upgrading of a distribution network are delayed, and the investment economy of a power grid is improved.

Description

technical field [0001] The invention belongs to the technical field of power quality management and control, and in particular relates to a demand-side storage and charging system and method suitable for a distribution station area, mainly applicable to a 0.4kV distribution station area. Background technique [0002] With the continuous improvement of the level of urban and rural electrification, the distribution network load continues to rise, and the daily load peak-to-valley difference gradually widens, causing problems such as overloading of distribution transformers in low-voltage distribution stations, over-limit voltage, three-phase imbalance, and low power factor. Prominent, directly affect the service level of users' electricity consumption. [0003] For the power quality control of power supply in low-voltage distribution stations, the traditional methods are mostly to install reactive power compensation devices, voltage regulating devices or balancing devices, etc...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/26H02J3/18H02J3/16H02J9/06
CPCH02J3/32H02J3/26H02J3/18H02J3/16H02J9/06H02J2203/10Y02E40/30Y02E40/50
Inventor 刘桁宇胡大伟朱义东王智博李海峰张新宇张哲王珊珊孙家政陈浩王南田野陈强史可鉴呼笑笑
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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