Energy storage power station system based on multi-network integration and transient control method
A technology of energy storage power station and controller, which is applied in the field of energy storage power station system and transient control based on multi-network integration, which can solve the problems of providing support for the power grid, increasing construction costs, and uncertain effect of primary frequency regulation of energy storage power stations. , to achieve the effect of improving the level of intelligence and reducing the cost of construction and operation and maintenance
Active Publication Date: 2019-11-12
NARI TECH CO LTD +1
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The station-level transient control function of the energy storage power station can be summarized as active power transient response capability and reactive power transient response capability. lack of functionality
On the one hand, the role of the energy storage power station is not fully utilized. On the other hand, it is not conducive to the safety and stability of the power grid where the energy storage power station is located. At the same time, the construction cost will be increased when adding other equipment to make up for its transient function.
Because the current energy storage power station architecture itself does not have station-level transient control capabilities, many energy storage stations are equipped with SVG devices in order to compensate for the impact of grid voltage mutations on energy storage power stations through fast reactive power compensation, which increases the area occupied At the same time as the equipment cost, the energy storage system becomes more complex
In addition, in order to enable the energy storage power station to have the primary frequency regulation capability, it is currently realized through the real-time control strategy of a single PCS, which brings two problems. One is that a single PCS needs to switch modes to perform primary frequency regulation. It will not be possible to execute the dispatched steady-state control instructions; secondly, the primary frequency modulation effect of multiple PCSs cannot guarantee consistency, resulting in that the primary frequency modulation effect of the entire energy storage power station may not be the expected effect
[0005] Therefore, the current energy storage power station architecture does not have transient response capabilities, and cannot provide support for the grid when encountering a transient fault of active and reactive power of the grid, and can only exit the operation by itself
In order to make up for its transient characteristics, it is necessary to add additional equipment, which increases the complexity and construction cost of the system at the same time; or it needs to rely on the mode switching of a single PCS, which will affect the normal operation of the energy storage power station, and the effect bad
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The implementation structure of the system of the present invention is as follows: figure 1 As shown, it includes a monitoring host (i.e., energy storage monitoring background, EMS), a remote control device, and several energy storage converters (PCS). One end of the energy storage converter is connected to the battery pack, and the other end is connected to the AC bus through a transformer. The DC side of the energy storage converter converts the DC power of the battery into AC power. Multiple energy storage converters step up the voltage through the transformer and connect to the grid through the common connection point (PCC, also known as the grid connection point). The transient controller is connected to the public connection point, which is an embedded device that obtains the parameters of the energy storage power station at the public connection point and sends instructions to the energy storage converter. The monitoring host, the telecontrol device, the energy s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an energy storage power station system based on multi-network integration and a transient control method. The system comprises a monitoring host, a telecontrol device, a transient controller and at least one energy storage converter. The transient controller is an embedded device for acquiring parameters of the energy storage power station at the common connection point andsending an instruction to the energy storage converters. The monitoring host, the telecontrol device, the energy storage converters and the transient controller are connected through a data network running an IEC61850 MMS protocol. The energy storage converters and the transient controller are connected through a data network running an IEC61850 goose protocol. The method is used for carrying outtransient control on the system. According to the invention, the defect that the architecture of the current energy storage power station does not have the transient response capability is solved; the energy storage power station can have the transient support capability of power grid frequency, voltage and the like; active and reactive rapid support is carried out on a transient fault of a powergrid, and the power grid accessed by energy storage is safer and more stable.
Description
technical field [0001] The invention relates to an energy storage power station system and a transient control method, in particular to an energy storage power station system and a transient control method based on multi-network integration. Background technique [0002] With the upgrading of energy reform and the rapid development of new energy power generation, energy storage has become a key supporting technology. In recent years, more and more energy storage power stations have been constructed and put into operation on the power supply side, grid side and user side. The station-level control technology of the energy storage power station directly determines the operation function of the energy storage power station. The current architecture of energy storage power stations includes a primary architecture and a secondary architecture. In terms of primary architecture, the DC side of the power storage converter (PCS) is connected to the battery to convert the DC power o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32H02J3/38Y04S10/16
Inventor侯凯蒋应伟王小红尹航王海峰张敏何安然洪希蔡伟钟旭缪文贵于海陈玉
OwnerNARI TECH CO LTD