CN107725127A - A kind of multiple-energy-source couples distributed energy resource system - Google Patents

Abstract

The invention discloses a multi-energy coupling distributed energy system, including a gas turbine unit, a waste heat boiler, a steam turbine generator set, an AC power distribution device, a medium-high temperature solar heat collection device, a photovoltaic photothermal integration device, a wind power generator set, and a direct current combination Control switches, AC inverters, and couple various energy utilization forms such as gas power generation, waste heat power generation, solar thermal power generation, solar photovoltaic power generation, solar heating, waste heat heating, and thermal storage. This system can complement multiple energy sources. , Stable and reliable operation, high comprehensive energy utilization rate, energy saving and high efficiency.

Description

A multi-energy coupled distributed energy system

technical field

The invention relates to an energy system, in particular to a multi-energy coupled distributed energy system, which belongs to the technical field of energy utilization.

Background technique

With the development of society, electric energy is crucial to people's life and work. In special areas such as disaster areas, remote mountainous areas, construction sites, and emergency sites, ground-fixed energy supply devices cannot provide energy, and if an energy station is constructed on site, the construction period will be long and cannot meet the energy demand in emergency situations. Distributed energy can solve the above problems. The distributed energy system installs the cooling, heating and power system directly on the user end in a small-scale, small-capacity, modularized, and decentralized manner, and can independently output cooling, heating, and electrical energy systems. Energy includes various forms such as solar energy utilization, wind energy utilization, fuel cell and gas combined cooling, heating, and electricity, and has the characteristics of reasonable energy utilization, low loss, less pollution, flexible operation, and good system economy.

In my country, the distributed energy system has just started and has not yet achieved large-scale application, and there are some shortcomings that limit its development: 1. There is no effective combination of multiple new energy systems, and they cannot give full play to their respective advantages and play a complementary role; 2. 1. The energy is not fully utilized, such as the waste heat of gas power generation and the heat dissipation of photovoltaic power generation; 3. The energy utilization method is single, such as solar energy is only used for photovoltaic power generation, and the utilization rate of solar energy is limited; 4. The instability of photovoltaic and wind power generation is not very serious. Good solution; 5. The comprehensive energy utilization rate of the system is low, and the system operation cost is high.

Contents of the invention

Technical problem: The purpose of the present invention is to overcome the defects of the above-mentioned existing related energy systems, and provide a multi-energy coupled distributed energy system that can complement multiple energy sources, operate stably and reliably, have high comprehensive energy utilization rate, and save energy and high efficiency.

Technical solution: In order to solve the above technical problems, the technical solution provided by the invention is:

A multi-energy coupling distributed energy system is adopted, including gas turbine units, waste heat boilers, steam turbine generator sets, AC power distribution devices, medium and high temperature solar heat collectors, photovoltaic photothermal integrated devices, wind power generators, DC combined control switches, AC inverter; the gas turbine unit is connected to the waste heat boiler through pipes, and the waste heat boiler pipes are respectively connected to the medium temperature heat load device and the steam turbine generator set; High-temperature solar collectors and AC power distribution devices are connected to AC loads through lines; medium and high-temperature solar collectors are connected to waste heat boilers and medium-temperature thermal load devices through pipes; The photothermal integrated device is connected to the DC combination control switch through the line; the wind turbine is connected to the DC combination control switch through the line; the DC combination control switch is connected to the AC inverter and the DC load through the line, and the AC inverter is connected to the AC load through the line.

As an improvement of the present invention, the photovoltaic photothermal integrated device is first connected to the low-temperature heat storage device through pipelines, and the low-temperature heat storage device is then connected to the low-temperature heat load device through pipelines; the waste heat boiler and medium-high temperature solar energy The heat collecting device is first connected to the medium temperature heat storage device through pipelines, and the medium temperature heat storage device is connected to the medium temperature heat load device and the low temperature heat storage device through pipelines.

As an improvement of the present invention, the photovoltaic photothermal integrated device is first connected to the maximum function point tracker through the line, and the maximum function point tracker is connected to the DC combined control switch through the line; to the pulse width modulator, which is then connected to the DC combination control switch through a line.

As an improvement of the present invention, the direct current combined control switch is connected with the battery energy storage system through a line.

As an improvement of the present invention, the AC power distribution device is firstly connected to the DC inverter through a line, and the DC inverter is then connected to the DC combined control switch through the line.

As an improvement of the present invention, the medium-high temperature solar heat collection device is a trough type solar heat collection device.

Beneficial effect:

1) A waste heat boiler is used to recover the waste heat generated by the gas turbine, which is used to provide power generation to the steam turbine unit or to the medium-temperature heat load device, reducing waste of heat energy and improving energy utilization.

2) The medium and high temperature solar energy device is adopted, which can assist the waste heat boiler to provide heat energy for the steam turbine generator set and reduce energy consumption. At the same time, the waste heat boiler also provides a stable auxiliary energy for solar medium temperature heating.

3) A medium-temperature heat storage device and a low-temperature heat storage device are installed to provide stable and continuous heat supply.

4) A battery energy storage system is set up to realize the control and management of stable, reliable and uninterrupted multi-energy power supply.

5) Through the control system, the most optimized, energy-saving and economical power generation method can be selected, and one or more of gas turbine power generation, waste heat power generation, solar thermal power generation, solar photovoltaic power generation, and wind power generation can be selected according to weather environment parameters and energy efficiency. Generate electricity in various ways.

6) Photovoltaic photothermal integrated device is adopted. Firstly, low-temperature hot water is provided while solar power is generated to reduce heat energy loss; secondly, the temperature of photovoltaic panels is lowered, the efficiency of photovoltaic power generation is improved, and the comprehensive utilization rate of solar energy is significantly improved.

7) The maximum power point tracker and pulse width modulator are used to improve the power generation efficiency and voltage stability of photovoltaic power generation and wind power generation.

8) Through the direct current combined control switch, as well as the auxiliary of AC power distribution device, AC inverter and DC inverter, the switching of multiple energy sources can be realized to provide stable and efficient direct current and alternating current, and solve the problem of solar power generation and wind power generation. Stability issues.

9) The design structure of this system is simple, the operating cost is low, stable and reliable, the energy saving benefit is remarkable, and it has better scalability.

Description of drawings

Figure 1 is a schematic diagram of a multi-energy coupled distributed energy system.

Among them are: gas turbine unit 1, waste heat boiler 2, steam turbine generator unit 3, AC power distribution device 4, medium and high temperature solar heat collection device 5, photovoltaic photothermal integration device 6, wind power generation unit 7, DC combined control switch 8, AC Inverter 9, medium temperature thermal load device 10, low temperature thermal load device 11, AC load 12, DC load 13, medium temperature thermal storage device 14, low temperature thermal storage device 15, maximum power point tracker 16, pulse width modulator 17 , battery energy storage system 18, DC inverter 19.

detailed description

Example 1

Referring to Figure 1, a multi-energy coupled distributed energy system is adopted, which is characterized in that the multi-energy coupled distributed energy system includes a gas turbine unit 1, a waste heat boiler 2, a steam turbine generator unit 3, an AC power distribution device 4, a medium-high temperature Solar heat collection device 5, photovoltaic photothermal integrated device 6, wind power generation unit 7, DC combined control switch 8, AC inverter 9; gas turbine unit 1 is connected to waste heat boiler 2 through pipelines, and waste heat boiler 2 is connected to medium-temperature furnace pipelines respectively The heat load device 10 and the steam turbine generator set 3; the steam turbine generator set 3 and the gas turbine set 1 are respectively connected to the AC power distribution device 4 through lines, the steam turbine generator set 3 is connected to the medium and high temperature solar heat collection device 5 through pipelines, and the AC power distribution device 4 is connected through the lines Connect the AC load 12; the medium and high temperature solar heat collection device 5 is respectively connected to the waste heat boiler 2 and the medium temperature heat load device 10 through pipelines; Connect the DC combination control switch 8 through the line; the wind power generating set 7 connects the DC combination control switch 8 through the line; the DC combination control switch 8 connects the AC inverter 9 and the DC load 13 respectively through the line, and the AC inverter 9 connects the AC through the line Load 12.

Example 2

As an improvement of the present invention, the photovoltaic photothermal integrated device 6 is first connected to the low-temperature heat storage device 15 through a pipeline, and the low-temperature heat storage device 15 is connected to the low-temperature heat load device 11 through a pipeline; the waste heat boiler 2 and the medium-high temperature solar heat collection device 5 are first connected to the medium-temperature heat storage device 14 through pipelines, and the medium-temperature heat storage device 14 is connected to the medium-temperature heat load device 10 and the low-temperature heat storage device 15 through pipelines.

Example 3

As an improvement of the present invention, the photovoltaic photothermal integrated device 6 is first connected to the maximum function point tracker 16 through a line, and the maximum function point tracker 16 is connected to the direct current combination control switch 8 through a line; It is first connected to the pulse width modulator 17 through the line, and then the pulse width modulator 17 is connected to the direct current combined control switch 8 through the line.

Example 4

As an improvement of the present invention, the direct current combination control switch 8 is connected with the battery energy storage system 18 through a line.

Example 5

As an improvement of the present invention, the AC power distribution device 4 is firstly connected to the DC inverter 19 through a line, and the DC inverter 19 is then connected to the DC combination control switch 8 through a line.

Example 6

As an improvement of the present invention, the medium-high temperature solar heat collector 5 is a trough solar heat collector.

Working principle and process:

See Figure 1,

Among them: 1 is a gas turbine unit, 2 is a waste heat boiler, 3 is a steam turbine generator set, 4 is an AC power distribution device, 5 is a medium-high temperature solar heat collection device, 6 is a photovoltaic photothermal integration device, 7 is a wind power generator set, 8 DC combination control switch, 9 AC inverter, 10 medium temperature thermal load device, 11 low temperature thermal load device, 12 AC load, 13 DC load, 14 medium temperature heat storage device, 15 low temperature heat storage Device, 16 is a maximum power point tracker, 17 is a pulse width modulator, 18 is a battery energy storage system, and 19 is a DC inverter.

The gas turbine unit 1 generates electricity, and at the same time provides the heat generated by the power generation to the waste heat boiler 2, and the high-temperature steam generated by the boiler is provided to the steam turbine generator unit 1 to generate electricity, and the AC power generated by the gas turbine unit 1 and the steam turbine generator unit 3 is sent to the AC power distribution device 4 for distribution. Electricity.

The cooling water of the steam turbine generator set 3 is first heated by the medium-high temperature solar heat collector 5, and then steam is generated by the waste heat boiler 2, which can reduce energy consumption and improve the utilization rate of solar energy.

The medium and high temperature water produced by the medium and high temperature solar heat collection device 5 is sent to the medium temperature heat storage device 14, and then sent to the medium temperature heat load device 10 for utilization. Stability, reliability and continuity of heat supply.

The electric energy generated by the photovoltaic photothermal integrated device 6 is transmitted to the direct current combination control switch 8 through the maximum power tracker 16, and the wind power generator is transmitted to the direct current combination control switch 8 through the pulse width modulator 17, the maximum The power point tracker 16 and the pulse width modulator 17 can improve the power generation efficiency and voltage stability of photovoltaic power generation and wind power generation.

The low-temperature hot water generated by the integrated photovoltaic device 6 is sent to the low-temperature heat storage device 15 , and then sent to the low-temperature thermal load device 11 for utilization. The medium-temperature heat storage device 14 can transfer heat to the low-temperature heat storage device 15, and indirectly use the heat of the waste heat boiler 2 for auxiliary heating, which can improve the water temperature, reliability and continuity of low-temperature heating.

The battery energy storage system 18 can store excess DC power, solve the mismatch between solar power generation and photovoltaic power generation and load, and improve the stability of the power supply system at the same time.

The alternating current generated by the gas turbine unit 1 and the steam turbine generator group 3 can be converted into direct current through the direct current inverter 19, and the switching of the switch 8 is controlled through the direct current combination, and the alternating current power distribution device 4, the alternating current inverter 9, and the direct current inverter 19 The auxiliary system can realize the switching of multi-energy power generation to provide stable and efficient direct current and alternating current, and solve the instability problem of solar power and wind power.

The present invention can also combine at least one of the technical features described in embodiments 2, 3, 4, 5, and 6 with embodiment 1 to form a new implementation mode.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not used to limit the protection scope of the present invention, and the protection scope of the present invention shall be determined by the claims.

Claims (6)

1. a kind of multiple-energy-source couples distributed energy resource system, it is characterised in that described multiple-energy-source coupling distributed energy resource system bag Include gas turbine group (1), waste heat boiler (2), turbine LP rotors (3), AC distribution device (4), high temperature solar energy collection Thermal (5), photovoltaic and photothermal integral device (6), wind power generating set (7), direct current combination controlling switch (8), exchange are inverse Become device (9)；Gas turbine group (1) connects waste heat boiler (2) by pipeline, and waste heat boiler (2) pipeline connects medium temperature regenerator respectively Device (14) and turbine LP rotors (3)；Turbine LP rotors (3) and gas turbine group (1) pass through connection respectively AC distribution device (4), turbine LP rotors (3) connect high temperature solar energy heat collector (5), AC distribution by pipeline Device (4) passes through connection AC load (12)；High temperature solar energy heat collector (5) connects waste heat pot by pipeline respectively Stove (2) and medium temperature regenerator device (14)；Photovoltaic and photothermal integral device (6) connects low-temperature heat accumulating device (15), light by pipeline Lie prostrate light-heat integration device (6) and controlling switch (8) is combined by connection direct current；Wind power generating set (7) passes through circuit Connect direct current combination controlling switch (8)；Direct current combination controlling switch (8) connects AC inverter (9) by circuit respectively With DC load (13), AC inverter (9) passes through connection AC load (12).

A kind of 2. multiple-energy-source coupling distributed energy resource system according to claim 1, it is characterised in that described photovoltaic light Heating integrated device (6) first passes through pipeline and is connected to low-temperature heat accumulating device (15), and low-temperature heat accumulating device (15) is connected again by pipeline It is connected to Low Temperature Thermal load device (11)；Described waste heat boiler (2) and high temperature solar energy heat collector (5) first passes through pipeline company Medium temperature regenerator device (14) is connected to, medium temperature regenerator device (14) is connected to middle warm load device (10) and low temperature by pipeline Regenerative apparatus (15).

A kind of 3. multiple-energy-source coupling distributed energy resource system according to claim 1, it is characterised in that described photovoltaic light Heating integrated device (6) first passes through connection and passed through to maximum function point tracker (16), maximum function point tracker (16) Circuit is connected to direct current combination controlling switch (8)；Wind power generating set (7) first passes through connection to pulse width modulator (17), pulse width modulator (17) is connected to direct current by circuit and combines controlling switch (8).

A kind of 4. multiple-energy-source coupling distributed energy resource system according to claim 1, it is characterised in that described direct current Combination controlling switch (8) is connected by circuit with battery energy storage system (18).

5. a kind of multiple-energy-source coupling distributed energy resource system according to claim 1, it is characterised in that described exchange is matched somebody with somebody Electric installation (4) first passes through connection and is connected to direct current by circuit to direct-flow inverter (19), direct-flow inverter (19) Combine controlling switch (8).

A kind of 6. multiple-energy-source coupling distributed energy resource system according to claim 1, it is characterised in that described high temperature Solar energy heat collector (5) is groove type solar heat collector.