WO2019019402A1

WO2019019402A1 - Intelligent power distribution equipment and system

Info

Publication number: WO2019019402A1
Application number: PCT/CN2017/105528
Authority: WO
Inventors: 陈凯家; 王桂星; 李云飞
Original assignee: 深圳市凯豪达氢能源有限公司
Priority date: 2017-07-28
Filing date: 2017-10-10
Publication date: 2019-01-31
Also published as: CN206628840U

Abstract

Intelligent power distribution equipment, comprising a fuel gas storage tank, a fuel cell stack, an inverter, a flow valve, a load power detecting circuit, and a controller. A gas output port of the fuel gas storage tank is connected to an intake port of the fuel cell stack via the flow valve. A power output interface of the fuel cell stack is connected to a load via the inverter. The load power detecting circuit is used for detecting load power and connected to a signal input pin of the controller. A control instruction output pin of the controller is connected to a control end of the flow valve and a switch of the fuel cell stack. The invention ensures the fuel cell stack can effectively adapt to a change in load power, providing a buffer against the impact of electric devices on utility power supplies during peak periods and reducing strain on a power grid during peak periods. The present invention increases utilization of renewable energy and further provides a possibility for large-scale, long-distance, and secure transportation of hydrogen.

Description

Intelligent power distribution equipment and system

[0001] The utility model belongs to the field of power generation, and in particular relates to an intelligent power distribution device and system.

Background technique

[0002] With the promotion and use of clean energy, the types and quantities of electrical equipment are also increasing. For example, more and more new energy vehicles have replaced traditional cars. With the increase in the types and quantities of electrical equipment, new requirements have also been placed on the power supply network. For example, for charging piles that supply energy to new energy vehicles, during the peak charging period of new energy vehicles, the power supply network needs to increase the power supply accordingly to avoid the impact of power consumption during peak hours.

[0003] In order to alleviate the impact on the utility power caused by the change of the power consumption, the renewable energy source can be incorporated into the power supply network, thereby reducing the impact of the power consumption peak period on the power supply network. However, since the renewable new energy itself is affected by weather and other factors, the power generation is unstable and cannot be well adapted to the power supply requirements during peak hours. technical problem

[0004] The purpose of the present invention is to provide an intelligent power distribution device and system to solve the problem that the power generation of the renewable energy is unstable due to the unstable power generation of the renewable energy in the prior art. Problem solution

Technical solution

[0005] In a first aspect, the present invention provides an intelligent power distribution device including a gas fuel storage tank, a fuel cell stack, an inverter, a flow valve, a load power detecting circuit, and a controller. among them:

[0006] The gas output interface of the gas fuel storage tank is connected to the intake port of the fuel cell stack through the flow valve, and the power output interface of the fuel cell stack is connected to the load through the inverter. The load power detecting circuit for detecting the load power is connected to a signal input pin of the controller, and a control command output pin of the controller and a control end of the flow valve and a fuel cell stack Closed.

[0007] Preferably, the power output interface of the fuel cell stack provides power to the load in parallel with the power supply network. The load power detecting circuit is disposed at the input end of the power supply network, or the load power detecting circuit is disposed at an input end of the load.

[0008] Preferably, the gas stored in the gas fuel storage tank is hydrogen.

[0009] Preferably, the hydrogen is obtained by electrolysis of a renewable energy source by an electrolysis water hydrogen production device, and then obtained through a remote transportation pipeline.

[0010] Preferably, the load is a charging pile or a residential electrical device.

[0011] Preferably, the intelligent power distribution device further includes a voltage regulator, and the voltage regulator is located between the load and the inverter.

[0012] In a second aspect, the present invention provides an intelligent power distribution system, which includes a renewable energy power station, an electrolysis water hydrogen generation device, a remote gas transmission pipeline, and any one of the first aspects. Smart power distribution equipment, where:

[0013] The renewable energy power station located at the remote end generates electric energy, and the renewable energy power station is connected to an electrolysis water hydrogen production device, and the hydrogen produced by the electrolysis water hydrogen production device is transported through the remote gas transmission pipeline To a gaseous fuel storage tank in the intelligent power distribution device.

[0014] Preferably, the renewable energy power station is one or more of a solar power station, a wind power station, and a hydroelectric power station.

Advantageous effects of the invention

Beneficial effect

[0015] In the present invention, the gas fuel storage tank is connected to the fuel cell stack through the flow valve, and after receiving the load power detected by the load power detecting circuit, the controller controls the flow rate of the flow valve, and correspondingly controls one or more Whether the fuel cell stack can generate electricity can effectively adapt the fuel cell stack to the change of load power, which is beneficial to buffering the impact of the power equipment during the peak period on the utility power, and reducing the burden of the power grid during the peak period of power consumption. .

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of an intelligent power distribution device provided by the present invention;

2 is a schematic structural diagram of an intelligent power distribution system according to an embodiment of the present invention. Embodiments of the invention

[0018] In order to make the objects, technical solutions, and advantages of the present invention more comprehensible, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 is a schematic structural view of an intelligent power distribution device according to the present invention, which is described in detail as follows:

[0020] The intelligent power distribution device of the present invention includes a gas fuel storage tank 1, a fuel cell stack 2, an inverter 3, a flow valve 4, a load power detecting circuit 5, and a controller 6, wherein:

[0021] The gas output interface of the gas fuel storage tank 1 is connected to the intake port of the fuel cell stack 2 through the flow valve 4, and the electric energy output interface of the fuel cell stack 2 passes through the inverter 3 is connected to the load 7, the load power detecting circuit 5 for detecting the load power is connected to a signal input pin of the controller 6, the control command output pin of the controller 6 and the flow valve The control end of 4 is connected to the fuel cell stack.

[0022] wherein the gas fuel storage tank 1 can be set according to the position of the load 7 or the position of the fuel cell stack 2. For example, for a large charging station load, the gas fuel storage tank 1 and the fuel cell stack 2 can be placed at the location of the charging pile station. The high-pressure gas energy stored in the gas fuel storage tank 1 is controlled to be turned on and off between the fuel cell stack 2 via the flow valve, and the fuel cell assembly that matches the gas flow is started after the flow valve is turned on. When the flow valve is closed and the gas is shut off, the matched fuel cell stack stops working. The gaseous fuel storage tank 1 can receive gaseous fuel delivered from other locations, and store the gaseous fuel in the gaseous fuel storage tank 1 during an electricity down period, and use the stored gaseous fuel during peak usage periods. The fuel cell stack 2 generates electricity to generate electrical energy.

[0023] The fuel cell stack 2 is an energy conversion device that reacts the fuel gas delivered by the gas fuel tank 1 into the battery pack to directly convert the chemical energy of the fuel into electrical energy. The fuel cell stack 2 includes a plurality, and each of the fuel cell stacks 2 is connected to the gas fuel storage tank 1 through a flow valve, respectively. When the number of fuel cells 2 is working, it can provide more power and can supply power to some of the consumers during peak hours. The fuel cell stack 2 can be arranged for electrical equipment, especially for power plants with higher power, such as dense living quarters, or large charging pile sites.

[0024] The inverter 3 is configured to convert DC power generated by the fuel cell group into AC power matched with the mains . The power of the inverter 3 should be matched with the maximum output power of the fuel cell stack 2, so that the DC power output from the fuel cell stack 2 can be stably and reliably converted while the entire fuel cell stack 2 is in operation.

[0025] The flow valve 4 may be used to control the entry of the gaseous fuel into the fuel cell stack 2, or may further control the level of efficiency of the gaseous fuel entering the fuel cell stack 2. A correspondence relationship between the shutoff ratio of the flow valve 4 and the output power of the fuel cell stack 2 can be established. After the power of the load is detected, the flow valve 4 can be controlled accordingly according to the power requirement of the load, so that the fuel cell stack 2 outputs the power matched with the load 7.

The load 7 may include one or more of a residential electrical device, a public electrical device, or a commercial electrical device. The residential electrical equipment may include a refrigerator, an air conditioner, a rice cooker, an induction cooker, and the like, and in particular, a relatively uniform electrical device is used. For example, air conditioners usually start when the summer is hot. The utility electrical equipment may include, for example, public lighting, public elevators, and the like. The commercial electrical equipment includes large-scale electrical equipment of the enterprise, such as a machine tool. It can also include large charging station sites, etc.

[0027] The load power detecting circuit 5 may include a current detecting circuit and a voltage detecting circuit, and calculate the actual power of the load by actually detecting the current value and the voltage value. The load power detected by the power detecting circuit adjusts the flow rate of the flow valve according to the power of the load, or controls the closed state of the flow valve.

[0028] As an optional implementation manner of the present invention, the power output interface of the fuel cell stack 2 and the power supply network provide power for the load 7 in parallel, and the load power detecting circuit 5 is disposed at the power supply. The network input terminal, or the load power detecting circuit 5 is disposed at an input end of the load 7. The power supply network is used to provide electrical energy to the electrical equipment under normal conditions. For example, it can be an existing utility power supply network or an industrial power supply network.

[0029] The load 7 is connected to the power supply network, and the load power detection circuit can also be compared with the power threshold set in the controller. After the power threshold is exceeded, the controller 6 according to the excess power, correspondingly Adjust the flow rate of the flow valve or the closed state. The power threshold can generally be the rated power of the normal power supply of the power supply network.

[0030] For example, the rated output power of each fuel cell stack 2 is XI, and the power output of the power supply network is X2. The load power detected by the load power detecting circuit 5 is X3. Then, when X3>X2吋, the working quantity N of the fuel cell stack can be obtained by calculating the formula: N= (X3-X2) /XI. The value of N is not an integer 吋, and N is the smallest integer value greater than N. Also, the conversion efficiency of the fuel cell stack can be controlled by a flow valve.

[0031] As an optional embodiment of the present invention, the gaseous fuel is hydrogen, and the hydrogen can be electrolyzed by a remote electrolyzed water hydrogen generating device by electrolyzing water to facilitate renewable energy. Hydrogen produced at the distal end can be delivered to the gaseous fuel storage tank 1 via a remote transfer conduit.

[0032] In order to ensure the stability of the operation of the electrical equipment, the intelligent power distribution apparatus further includes a voltage regulator 8, and the voltage regulator 8 is located between the load 7 and the inverter 3. Through the voltage regulation of the voltage regulator 8, it can provide a stable power supply for the electrical equipment, and avoid damage to the electrical equipment due to sudden voltage changes.

[0033] Of course, the load power detected by the load power detecting circuit 5 can be sent to the controller through a communication module, such as an INTERNET network or a mobile communication network.

2 is a schematic structural view of an intelligent power distribution system provided by the present invention, which is described in detail as follows:

[0035] As shown in FIG. 2, the intelligent power distribution system includes a renewable energy power station 9, an electrolysis water hydrogen generation device 10, a remote gas transmission pipe 11, and an intelligent power distribution device, and the intelligent power distribution device includes a gas fuel storage tank 1, a fuel cell stack 2, an inverter 3, a flow valve 4, a load power detecting circuit 5, and a controller 6, wherein

[0036] The renewable energy power station 9 located at the far end generates electric energy, and the renewable energy power station 9 is connected to the electrolysis water hydrogen production device 10, and the hydrogen gas produced by the electrolysis water hydrogen production device 10 is via the remote The gas pipeline 1 1 is delivered to the gaseous fuel storage tank 1 in the intelligent power distribution apparatus.

[0037] The gas output interface of the gas fuel storage tank 1 is connected to the intake port of the fuel cell stack 2 through the flow valve 4, and the electric energy output interface of the fuel cell stack 2 passes through the inverter 3 is connected to the load 7, the load power detecting circuit 5 for detecting the load power is connected to a signal input pin of the controller 6, the control command output pin of the controller 6 and the flow valve The control end of 4 is connected to the fuel cell stack.

[0038] The renewable energy power station 9 includes, but is not limited to, one or more of a solar power station, a wind power station, and a hydroelectric power station. Of course, as an optional embodiment of the present invention, the electrolyzed water hydrogen production device 10 can also be connected to a power supply network, and can be powered by the power supply network during the power low period. The electrolysis water hydrogen production device 10 is configured to produce hydrogen gas in preparation for converting electric energy from hydrogen during the peak period of power consumption, buffering the demand for high-power operation of the electric equipment, and reducing the impact of the peak power consumption period on the commercial power.

[0039] In addition, the electrolyzed water hydrogen production device 10 can use an inexpensive metal nickel-iron alloy and foamed nickel as an electrode, which can overcome the problem that the expensive precious metal is expensive and unsustainable, and greatly reduces the cost of the electrolyzed water hydrogen production equipment. And three-dimensional nano-electrodes can be used, which increases the reaction contact area compared with the conventional two-dimensional plate electrode, which is beneficial to increase the reaction rate. After detailed experimental research and comparative experiments, the three-dimensional nano-electrodes made of nickel-iron alloy and nickel foam can reduce the energy consumption by 10%-15<3⁄4 compared with the traditional electrolysis water hydrogen electrode.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be It is included in the scope of protection of the present invention.

Claims

Claim

[Claim 1] An intelligent power distribution apparatus, comprising: a gas fuel storage tank, a fuel cell stack, an inverter, a flow valve, a load power detecting circuit, and a controller, wherein:

a gas output interface of the gas fuel storage tank is connected to the intake port of the fuel cell stack through the flow valve, and the power output interface of the fuel cell stack is connected to the load through the inverter for detecting The load power detecting circuit of the load power is connected to a signal input pin of the controller, and a control command output pin of the controller is connected to a control end of the flow valve and a fuel cell stack .

[Claim 2] The intelligent power distribution apparatus according to claim 1, wherein the power output interface of the fuel cell stack supplies power to the load in parallel with a power supply network, and the load power detection circuit is disposed in the At the input end of the power supply network, or the load power detecting circuit is disposed at an input end of the load.

[Claim 3] The intelligent power distribution apparatus according to claim 1, wherein the gas stored in the gas fuel storage tank is hydrogen.

[Claim 4] The intelligent power distribution apparatus according to claim 3, wherein the hydrogen is obtained by electrolysis of a regenerable energy source through an electrolysis water hydrogen production apparatus through a remote transport pipe.

[Claim 5] The intelligent power distribution apparatus according to claim 1, wherein the load is a charging pile or a residential electrical equipment.

[Claim 6] The intelligent power distribution apparatus according to claim 1, wherein the intelligent power distribution apparatus further includes a voltage regulator, and the voltage regulator is located between the load and the inverter.

[Claim 7] An intelligent power distribution system, comprising: a renewable energy power station, an electrolysis water hydrogen generation device, a remote gas transmission pipe, and any one of claims 1-6 Intelligent power distribution equipment, where:

The renewable energy power station located at the far end generates electrical energy, and the renewable energy power station is connected to an electrolysis water hydrogen production device, and the hydrogen produced by the electrolysis water hydrogen production device is transported to the A gas fuel storage tank in an intelligent power distribution device.

[Claim 8] The intelligent power distribution system according to claim 7, wherein the renewable energy source Power stations include, but are not limited to, one or more of solar power plants, wind power plants, and hydroelectric power stations.