A Hybrid Flexible Loop Closing Device and Optical-storage Sharing Interface Control Method
A technology for sharing interfaces and control methods, applied in the field of distributed energy grid-connected control, can solve problems such as waste of power equipment, low control efficiency, and unsatisfactory control effects, and achieve the effect of reducing input costs and improving operating efficiency
Active Publication Date: 2021-07-27
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At the same time, the grid-connected control of photovoltaic and energy storage systems usually adopts the method of independent control of each system, and coordinates the power of various distributed energy sources by setting up a higher-level control center, resulting in waste of power equipment and low control efficiency. Involving some estimated data makes the control effect unsatisfactory
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
[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] The hybrid flexible ring closing device of the present invention includes an interface conversion device, an AC mechanical switch and a DC mechanical switch. The structure diagram of the device is as follows figure 1 shown. The hybrid flexible loop closing device includes two voltage source converters (Voltage Source Converter, VSC), the two voltage source converters VSC1 and VSC2 are respectively connected to two different AC systems, and the two voltage source converters are used as photovoltaic, An AC interface conversion device for energy storage. The AC output side is composed of two AC circuit breakers and a mechanical isolating switch. The two AC circuit breakers AK1 and AK2 are respectively connected to the output sides of two voltage source converters VSC1 and VSC2. The two ends of the mechanical isolating swi...
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 a hybrid flexible ring closing device and a method for controlling an optical-storage shared interface, which includes two voltage source converters, an AC circuit breaker and a DC switch, and the AC sides of the two voltage source converters pass through the AC circuit breaker respectively. The converter is connected to two different AC systems, and an isolation switch is connected between the AC sides of the two voltage source converters; the DC side of the voltage source converter includes two capacitors and five switches, and the two voltage source converters The converter is used as the AC interface of the photovoltaic system and the energy storage system to convert the equipment and compensate the power of the AC grid at the same time. The present invention uses a set of equipment sharing interfaces to complete timely and precise control of multiple distributed energy sources, which can meet the needs of photovoltaic and distribution transformers, photovoltaics and energy storage, energy storage and distribution transformers, and distribution transformers in different application scenarios. The power and energy interaction requirements between them effectively reduce the input cost of the interface converter and improve the overall operating efficiency of the system.
Description
technical field [0001] The invention relates to a distributed energy grid-connected control technology, in particular to a hybrid flexible ring closing device and a control method for an optical-storage shared interface. Background technique [0002] In recent years, photovoltaics and energy storage have grown rapidly in medium and low voltage distribution networks. Photovoltaic is a clean and renewable energy, and it is an important means to alleviate the power supply shortage caused by the rapid growth of distribution network load. Energy storage is an important means of energy management in the distribution network. The use of energy storage can effectively manage the frequent fluctuations of distribution network power flow and voltage caused by the fluctuation of distributed photovoltaic output; it has the function of peak-shaving and valley-filling, and can suppress the load caused by the peak period. The distribution network power blocking phenomenon, optimize the pow...
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 Patent Type & Authority Patents(China)
IPC IPC(8): H02S10/20H02J3/38
CPCH02J3/38H02S10/20H02J2300/26Y02E10/56Y02E70/30
Inventor 葛雪峰杨景刚袁栋袁宇波程力涵史明明袁晓冬刘瑞煌张宸宇姜云龙司鑫尧苏伟肖小龙
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST