CN105811442B - A kind of electrification access device of Mobile energy storage system grid connection 10kV route - Google Patents

A kind of electrification access device of Mobile energy storage system grid connection 10kV route Download PDF

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CN105811442B
CN105811442B CN201510581177.XA CN201510581177A CN105811442B CN 105811442 B CN105811442 B CN 105811442B CN 201510581177 A CN201510581177 A CN 201510581177A CN 105811442 B CN105811442 B CN 105811442B
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storage system
energy storage
energy
circuit breaker
transformer
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CN105811442A (en
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李爱魁
王伟
刘飞
姜国义
刘海波
肖冰
袁晓冬
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Wuhan NARI Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
State Grid Eastern Inner Mongolia Power Co Ltd
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Wuhan NARI Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
State Grid Eastern Inner Mongolia Power Co Ltd
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Abstract

The present invention relates to Mobile energy storage systems technology fields, refer in particular to a kind of electrification cut-in method of Mobile energy storage system grid connection 10kV route, 10kV route energy-storage system access point is provided with energy-storage system electrification access device, energy-storage system charges in access device series connection access 10kV route, energy-storage system charges access device by the vacuum circuit breaker with disconnecting switch, disconnecting switch, step transformer, high-tension switch cabinet, voltage transformer, the composition such as current transformer and arrester, vacuum circuit breaker with disconnecting switch is equipped with disconnecting switch, step transformer, high-tension switch cabinet, voltage transformer, current transformer, arrester and energy-storage system combination settings.The present invention effectively realizes access of the Mobile energy storage system under 10kV route not power-off condition and exits.

Description

A kind of electrification access device of Mobile energy storage system grid connection 10kV route
Technical field
The present invention relates to Mobile energy storage systems technology field, a kind of Mobile energy storage system grid connection 10kV route is refered in particular to Charge access device.
Background technique
In recent years, with the rapid development of our country's economy, to the power supply capacity and power supply quality of rural power grids and urban power distribution network Propose increasingly higher demands.It especially returns to one's native place in festivals or holidays rural migrant worker's scale and irrigation season, rural power load surges, shape At peakload, regional area, local period is caused the phenomenon of power supply capacity deficiency occur;And in other periods, power grid electricity consumption Only general lighting electricity consumption, transformer almost idle running, power load peak-valley difference is away from big, and power load rate is low, electric grid investment Inefficiencies.To improve power supply capacity when rural power grids and urban power distribution network peakload, while improving the utilization rate of electric power resource And returns of investment, Mobile energy storage system can become crucial one of support technology.
Mobile energy storage system layout is flexible, it may be convenient to which being transported to needs place to be used, matches in rural power grids and city It discharges when peak load of grid operation, charge operation when low ebb load is realized to rural power grids and urban power distribution network active reactive power Effective support.
The patent document of China Patent No. 201220494193.7 discloses a kind of energy storage access system, is used for multiple energy storage Energy conversion between battery and power grid, but the energy-storage system only accesses 0.4kV distribution network system, does not account for access 10kV Rural power grids and urban power distribution network system, the band for also not accounting for energy-storage system are electrically accessed.
The patent document of China Patent No. 201510002368.6 provides energy storage device in the access of 0.4kV distribution net side Mode realizes the guarantor's power supply and seaonal load application of high reliability, but the energy storage device only accesses 0.4kV power distribution network system System, does not account for access 10kV rural power grids and urban power distribution network system, the band for also not accounting for energy storage device are electrically accessed.
The patent document of China Patent No. 201410253870.X discloses a kind of box energy storage substation structure, including even The High-voltage Incoming Cabinet for connecing high-voltage fence is delivered to low pressure through transformer, metering cabinet by the high-tension current that High-voltage Incoming Cabinet exports and matches Electric cabinet is equipped with accumulation chamber between the metering cabinet and low-voltage distribution cabinet, but the invention does not account for energy storage device band and is electrically accessed 10kV rural power grids and urban power distribution network system.
Summary of the invention
In view of the above problems, the present invention provides a kind of bands of Mobile energy storage system grid connection 10kV route to be electrically accessed dress It sets, realizes plug and play of the Mobile energy storage system under 10kV route not power-off condition.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of electrification access device of Mobile energy storage system grid connection 10kV route, in 10kV route energy-storage system access point It is provided with energy-storage system electrification access device, energy-storage system charges in access device series connection access 10kV route, energy-storage system band Device is electrically accessed by the vacuum circuit breaker with disconnecting switch, disconnecting switch, step transformer, high-tension switch cabinet, mutual induction of voltage The composition such as device, current transformer and arrester, the vacuum circuit breaker with disconnecting switch are equipped with disconnecting switch, the liter Step-down transformer, high-tension switch cabinet, voltage transformer, current transformer, arrester and energy-storage system combination settings.
Furthermore, the vacuum circuit breaker with disconnecting switch includes the first vacuum circuit breaker and the second vacuum circuit breaker Device, the first vacuum circuit breaker are connected on the bus bar side and load side of 10kV route, and the second vacuum circuit breaker is connected on 10kV route Bus bar side, disconnecting switch are connected on 10kV line load side.Using such structure setting, pass through breaker and disconnecting switch Combinative movement is realized access of the Mobile energy storage system under 10kV route not power-off condition and is exited.
Furthermore, second vacuum circuit breaker is connected to arrester and current transformer, and disconnecting switch is connected to Voltage transformer, current transformer and voltage transformer are connected to high-tension switch cabinet, and high-tension switch cabinet is connected to buck Transformer, step transformer are connected to energy-storage system.Using such structure setting, realize that the electrification of grid-connected 10kV route connects Enter and exits.
Furthermore, the energy-storage system is made of energy-storage battery, energy storage bidirectional converter, energy storage monitoring device.By In energy-storage system flexible layout, it may be convenient to be transported to energy-storage system access point, wherein energy-storage battery includes but is not limited to lead Acid accumulator, lithium battery, flow battery and supercapacitor etc..
The invention has the advantages that:
The present invention charges access device by the way that energy-storage system is arranged in energy-storage system access point, realizes Mobile energy storage system Plug and play under 10kV route not power-off condition avoids line outage bring economic loss, gives full play to movable type Energy-storage system power capacity is adjustable, the advantage of system effectiveness and flexible layout, solves rural power grids and urban power distribution network end Peakload and seaonal load difference problem, improve the power supply capacity and reliability of rural power grids and urban power distribution network.
Detailed description of the invention
Fig. 1 is the schematic diagram of electrification access device of the present invention;
Fig. 2 is the schematic diagram of energy-storage system of the present invention.
QF1, the first vacuum circuit breaker;QF2, the second vacuum circuit breaker;QS1, disconnecting switch;F1, arrester;PT, voltage Mutual inductor;CT, current transformer.
Specific embodiment
Technical solution of the present invention is illustrated with embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of electrification access device of Mobile energy storage system grid connection 10kV route of the present invention, 10kV route energy-storage system access point is provided with energy-storage system electrification access device, and energy-storage system charges access device series connection access In 10kV route, energy-storage system charges access device by the vacuum circuit breaker with disconnecting switch, disconnecting switch QS1, lifting buckling The composition such as depressor, high-tension switch cabinet, voltage transformer pt, Current Transmit and arrester F1, it is described with disconnecting switch Vacuum circuit breaker is equipped with disconnecting switch QS1, the step transformer, high-tension switch cabinet, voltage transformer pt, electric current Mutual inductor CT, arrester F1 and energy-storage system combination settings.
Above to constitute basic structure of the present invention, wherein step transformer is used for power grid 10kV voltage and energy storage Bidirectional variable-flow Device exports the conversion of 380V voltage, and high-tension switch cabinet realizes that energy-storage system accesses 10kV high-tension line, voltage transformer pt and electricity Current transformer CT measures the voltage and current at energy-storage system access 10kV route respectively, in the input side of Mobile energy storage system Configuring an arrester F1 avoids energy-storage system by thunder disaster.
More specifically, the vacuum circuit breaker with disconnecting switch includes the first vacuum circuit breaker QF1 and the second vacuum Circuit breaker Q F2, the first vacuum circuit breaker QF1 are connected on the bus bar side and load side of 10kV route, the second vacuum circuit breaker QF2 string It is associated in 10kV line bus side, disconnecting switch QS1 is connected on 10kV line load side.Using such structure setting, by disconnected Road device and the combinative movement of disconnecting switch are realized access of the Mobile energy storage system under 10kV route not power-off condition and are exited.
More specifically, the second vacuum circuit breaker QF2 is connected to arrester F1 and Current Transmit, disconnecting switch QS1 is connected to voltage transformer pt, and Current Transmit and voltage transformer pt are connected to high-tension switch cabinet, the high pressure Switchgear is connected to step transformer, and the step transformer is connected to energy-storage system.It is real using such structure setting The band of existing grid-connected 10kV route is electrically accessed and exits.
When Mobile energy storage system access 10kV route, circuit breaker Q F1 is in coincidence at this time, circuit breaker Q F2 and keeps apart It closes QS1 and is in quartile.Mobile energy storage system side is connected into circuit breaker Q F2, other side connection according to the phase sequence of 10kV route Disconnecting switch QS1 successively closes disconnecting switch QS1 and circuit breaker Q F2, is then turned off circuit breaker Q F1, and mobile storage can be realized Energy system, which does not have a power failure, accesses 10kV route.
When Mobile energy storage system exits 10kV route, circuit breaker Q F1 is in quartile at this time, circuit breaker Q F2 and keeps apart It closes QS1 and is in coincidence.After energy-storage system is out of service, circuit breaker Q F1 is closed, successively cut-off breaker QF2 and disconnecting switch QS1 disconnects the connecting cable of Mobile energy storage system and circuit breaker Q F2 and disconnecting switch QS1, Mobile energy storage system can be realized System, which does not have a power failure, exits 10kV route.
More specifically, as shown in Fig. 2, heretofore described energy-storage system is by energy-storage battery, energy storage bidirectional converter, storage It can monitoring device composition.Wherein energy-storage battery includes but is not limited to lead-acid accumulator, lithium battery, flow battery and supercapacitor Deng the power and capacity of energy-storage battery configure as needed;Energy storage bidirectional converter realizes energy-storage battery DC voltage and power grid The two-way changing of alternating voltage;On the one hand energy storage monitoring device monitors the operating status of energy-storage battery and energy storage bidirectional converter, Ensure energy-storage system safe and reliable operation, on the other hand receive the instruction of dispatching of power netwoks department, energy storage is controlled according to power curve The charge and discharge electricity operation of battery.
Mobile energy storage system has charge and discharge control function on the spot, is provided simultaneously with distant place control function, according to power grid tune The power curve control energy-storage system of degree department is filled in rural power grids and the electric discharge operation of urban power distribution network peak hours, low ebb load Electricity operation realizes " peak load shifting " of load.
The above are the preferable embodiments of the present invention, and those skilled in the art in the invention can also be to above embodiment It changes and modifies.Therefore, the invention is not limited to above-mentioned specific embodiments, and all those skilled in the art are at this Made any conspicuous improvement, replacement or modification all belong to the scope of protection of the present invention on the basis of invention.

Claims (3)

1.一种移动式储能系统并网10kV线路的带电接入装置,其特征在于:在10kV线路储能系统接入点设置有储能系统带电接入装置,所述储能系统带电接入装置串联接入10kV线路中,所述储能系统带电接入装置由带隔离开关的真空断路器、隔离开关、升降压变压器、高压开关柜、电压互感器、电流互感器以及避雷器组成,所述带隔离开关的真空断路器与隔离开关配合设置,所述升降压变压器、高压开关柜、电压互感器、电流互感器、避雷器与储能系统组合设置;1. the live access device of a mobile energy storage system grid-connected 10kV line, it is characterized in that: the energy storage system live access device is provided at the 10kV line energy storage system access point, and the energy storage system live access The device is connected in series to the 10kV line, and the live access device of the energy storage system is composed of a vacuum circuit breaker with an isolating switch, an isolating switch, a step-up and step-up transformer, a high-voltage switch cabinet, a voltage transformer, a current transformer and a surge arrester. The vacuum circuit breaker with isolating switch is arranged in cooperation with the isolating switch, and the buck-boost transformer, high-voltage switch cabinet, voltage transformer, current transformer, lightning arrester and energy storage system are combined and arranged; 所述带隔离开关的真空断路器包括第一真空断路器与第二真空断路器,所述第一真空断路器串联在10kV线路的母线侧和负荷侧之间,所述第二真空断路器串联在10kV线路母线侧,所述隔离开关串联在10kV线路负荷侧。The vacuum circuit breaker with isolating switch includes a first vacuum circuit breaker and a second vacuum circuit breaker, the first vacuum circuit breaker is connected in series between the bus side and the load side of the 10kV line, and the second vacuum circuit breaker is connected in series On the bus side of the 10kV line, the isolating switch is connected in series on the load side of the 10kV line. 2.根据权利要求1所述一种移动式储能系统并网10kV线路的带电接入装置,其特征在于:所述第二真空断路器连接于避雷器与电流互感器,所述串联在10kV线路负荷侧的隔离开关连接于电压互感器,所述电流互感器与电压互感器分别连接于高压开关柜,所述高压开关柜连接于升降压变压器,所述升降压变压器连接于储能系统。2. A live access device for a mobile energy storage system grid-connected 10kV line according to claim 1, characterized in that: the second vacuum circuit breaker is connected to the arrester and the current transformer, and the series is connected to the 10kV line The isolation switch on the load side is connected to the voltage transformer, the current transformer and the voltage transformer are respectively connected to the high-voltage switchgear, the high-voltage switchgear is connected to the buck-boost transformer, and the buck-boost transformer is connected to the energy storage system . 3.根据权利要求1所述一种移动式储能系统并网10kV线路的带电接入装置,其特征在于:所述储能系统由储能电池、储能双向变流器、储能监控装置组成。3. The live access device of a mobile energy storage system grid-connected 10kV line according to claim 1, wherein the energy storage system is composed of an energy storage battery, an energy storage bidirectional converter, and an energy storage monitoring device. composition.
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