Industrial park energy scheduling device with source, storage and load coordinated operation

Abstract

The utility model provides an industrial park energy scheduling device with source, storage and load coordinated operation. The industrial park energy scheduling device comprises a combined heat and power generation type gas turbine, a gas-fired boiler, an electric refrigerator, a photovoltaic power generation system, a heat energy storage device, an electric energy storage device and a controllable electric load. The gas turbine and the gas-fired boiler are connected with a heat storage device and a thermal load, the gas turbine and the photovoltaic power generation system are connected with an electric power system, the electric power system is connected with an electric refrigerator, an electric load, a controllable electric load and an electric energy storage device, and the electric refrigerator is connected with a cold load; the controllable electric load is used for peak clipping and valley filling. According to the utility model, the unit energy utilization rate of the system is improved while energy waste is reduced, and the stability and flexibility of the park energy system are improved.

Description

Technical Field

[0001] This utility model relates to the field of comprehensive utilization technology of industrial parks, specifically to an energy dispatching device for industrial parks that integrates source, storage and load operation. Background Technology

[0002] As the scale of electricity consumption in the park continues to expand and the types of loads continue to increase, the requirements for power supply quality in the park's energy system are constantly rising. Researching integrated energy coordination planning that combines energy sources, storage, and load in the park is becoming an important issue in the planning and operation of the park's energy system, and is of great significance for ensuring the reliability and economy of energy use in the park.

[0003] There is a lack of research on existing energy dispatching equipment that takes into account both integrated energy storage and integrated energy response in the coordinated planning and operation of industrial parks, and there are certain shortcomings. Therefore, we propose an energy dispatching device for industrial parks that integrates source, storage and load operation. Utility Model Content

[0004] The purpose of this utility model is to provide an energy dispatching device for industrial parks that integrates source, storage, and load operation in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] An industrial park energy dispatching system for source-storage-load coordinated operation includes: a combined heat and power (CHP) gas turbine, a gas boiler, an electric chiller, a photovoltaic power generation system, a thermal energy storage device, an electric energy storage device, and a controllable electrical load; the gas turbine and gas boiler are connected to the thermal storage device and the thermal load, the gas turbine and photovoltaic power generation system are connected to the power system, the power system is connected to the electric chiller, the electrical load, the controllable electrical load, and the electric energy storage device, and the electric chiller is connected to the cooling load; the controllable electrical load is used for peak shaving and valley filling; the heat generated by the gas turbine and gas boiler is used to meet the thermal load demand, and the surplus heat is stored in the thermal storage device, which releases heat energy when the heat source is insufficient; the gas turbine and photovoltaic power generation are power generation devices in the power system, and the generated electricity meets the electricity demand, with the surplus electricity stored in the electric energy storage device, which releases electricity energy when the power is insufficient; the electric chiller is a cooling source device that meets the cooling load demand.

[0007] Furthermore, the controllable electrical load includes at least one of the following: freight electric vehicles used for transporting goods in the industrial park, company electric shuttle buses for picking up and dropping off employees, and private electric vehicles owned by residents of the park.

[0008] Furthermore, the model of the energy storage device is as follows:

[0009] Q1(t)=Q1(t-1)+(P5*η5-P6 / η6)

[0010] In the formula: Q1(t) and Q1(t-1) represent the battery charge at time t and time t-1, respectively;

[0011] η5 and η6 represent the charging and discharging efficiencies of the battery, respectively.

[0012] P5 and P6 represent the battery's charging and discharging power, respectively.

[0013] Q2(t)=Q2(t-1)+(W7*η7-W8 / η8)

[0014] In the formula: Q2(t) and Q2(t-1) represent the heat of the thermal storage device at time t and time t-1, respectively;

[0015] η7 and η8 represent the battery's heat storage and heat release efficiencies, respectively.

[0016] W7 and W8 represent its heat storage and heat release power, respectively.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) When the electrical load of this utility model is large, that is, when the park is in the industrial production period, the gas turbine, as a cogeneration equipment, generates a lot of waste heat while supplying electricity, which needs to be recovered in time; when the electrical load of the system is small, that is, when the park is in the non-industrial production period, the power output of the gas turbine, as a cogeneration equipment, decreases, and the heating power in the park is insufficient.

[0019] (2) This utility model is equipped with a certain amount of heat storage equipment in the system. When the heat supply is sufficient, the system stores heat energy; when the heat supply is insufficient, it releases heat energy. This reduces energy waste and improves the unit energy utilization rate of the system, thereby improving the stability and flexibility of the park's energy system.

[0020] (3) This utility model is equipped with a sufficient number of electric vehicles with stable operating patterns, which serve as controllable load response devices to participate in the coordinated optimization of the park's power source and load system. The system manages the charging and discharging behavior of the electric vehicles participating in the coordinated operation of power source and load, making full use of the vehicle battery capacity to shave peaks and fill valleys, thereby improving the flexibility and stability of the park's power system operation. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the park energy system in this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] Please see Figure 1 This utility model provides an energy dispatching device for industrial parks that integrates energy source, storage, and load operation, comprising: a combined heat and power (CHP) gas turbine, a gas boiler, an electric chiller, a photovoltaic power generation system, a thermal energy storage device, an electric energy storage device, and a controllable electrical load; the gas turbine and gas boiler are connected to the thermal storage device and the thermal load, the gas turbine and photovoltaic power generation system are connected to the power system, the power system is connected to the electric chiller, the electrical load, the controllable electrical load, and the electric energy storage device, and the electric chiller is connected to the cooling load; the controllable electrical load is used for peak shaving and valley filling.

[0024] Combined heat and power (CHP) gas turbines are the main power and heat supply equipment in CHP systems, used to meet the demand for electricity and heat loads. As a supporting power source and peak-shaving power source, the power generated by the gas turbine is adjusted in a timely manner according to the electrical load and the output of the distributed photovoltaic power generation system. While supplying electricity, the gas turbine also generates a considerable amount of waste heat, which can meet the heat load supply demand of the system. When the heat power of the CHP system is insufficient, the gas boiler supplies heat in a timely manner to ensure the heat load demand in the industrial park and maintain the normal operation of production and life.

[0025] When the electrical load is large, i.e., during industrial production periods in the park, the gas turbines, acting as cogeneration equipment, generate a significant amount of waste heat while supplying electricity, which needs to be recovered promptly. Conversely, when the electrical load is small, i.e., during non-industrial production periods in the park, the power output of the gas turbines decreases, resulting in insufficient heating capacity within the park. By configuring a certain amount of thermal storage devices in the system, heat energy is stored when heating is sufficient and released when heating is insufficient. This reduces energy waste while improving the system's unit energy utilization rate, thereby enhancing the stability and flexibility of the park's energy system.

[0026] Gas-fired boilers are used to meet the heat load backup; gas turbines are used to meet the heat load supply demand. When the heat power of the cogeneration system is insufficient, the gas-fired boilers can supply heat in a timely manner to ensure the heat load demand in the industrial park and maintain the normal operation of production and life.

[0027] Electric refrigeration units are used to meet cooling load requirements.

[0028] Distributed photovoltaic (PV) power generation systems serve as a carrier of renewable energy. The power output of the PV modules in the system is basically consistent with the changes in sunlight intensity. In industrial parks, where factory buildings are generally low and flat, a large number of rooftops can be equipped with distributed PV power generation systems to reduce the land area occupied in the park and make full use of solar energy resources.

[0029] Thermal energy storage devices are used to store heat sources.

[0030] Electric energy storage devices are used to meet peak power demand.

[0031] Controllable electrical loads are configured with a sufficient number of electric vehicles with stable operating patterns. These vehicles serve as controllable electrical load response devices and participate in the coordinated optimization of the park's power source and energy storage system. The system manages the charging and discharging behavior of electric vehicles participating in the coordinated operation of power source and energy storage, making full use of the vehicle battery capacity for peak shaving and valley filling, thereby improving the flexibility and stability of the park's power system operation.

[0032] The specific connection relationships and cooperation processes in this utility model device include: the natural gas network provides gas for the gas turbine and gas boiler; the heat generated by the gas turbine and gas boiler is used to meet the thermal load demand; the surplus heat is stored in the thermal storage device, which releases heat energy when the heat source is insufficient; the gas turbine and photovoltaic power generation are power generation devices in the power system; the generated electricity meets the power demand of devices such as power load, electric vehicles, and electric chillers; the surplus electricity is stored in the electric energy storage device, which releases electrical energy when the power is insufficient; the electric chiller is a cold source device that meets the cooling load demand.

[0033] In this embodiment, preferably, the cogeneration gas turbine uses natural gas as fuel, converting chemical energy into mechanical energy to drive the generator rotor to rotate at high speed to generate electricity, which is then transmitted to the electrical load equipment through the park's power grid. The mathematical model for the electrical power and thermal power output of the gas turbine is established as follows:

[0034] P1=V*H*η1

[0035] W1=V*H*η2

[0036] Where: P1—electrical power output by the gas turbine;

[0037] V – The volume of natural gas consumed by the gas turbine;

[0038] H – Calorific value of natural gas, 9.78 kWh / m³ 3 ;

[0039] η1 — Gas turbine power generation efficiency;

[0040] W1—The thermal power output of the gas turbine;

[0041] η2 — Gas turbine thermal efficiency.

[0042] In this embodiment, preferably, the gas-fired boiler uses natural gas as fuel, converting the chemical energy in the natural gas into thermal energy in the heat transfer medium, and then delivering it to the heat load equipment through the heating network. The mathematical model for the thermal power output of the gas-fired boiler is established as follows:

[0043] W2=V*H*η3

[0044] Where: W2—the thermal power output of the gas-fired boiler;

[0045] η3 — Energy efficiency coefficient of gas-fired boiler.

[0046] In this embodiment, preferably, the electric chiller converts electrical energy into cooling power output and delivers it to the cooling load equipment through cooling pipes. The mathematical model of the cooling output power of the electric chiller is as follows:

[0047] W3=η4*P2

[0048] Where: W3—the cooling and heating power output by the electric chiller;

[0049] η4 — the refrigeration efficiency coefficient of the electric chiller;

[0050] P2 — Electrical power absorbed by the electric chiller.

[0051] In this embodiment, preferably, the distributed photovoltaic power generation system includes photovoltaic modules, inverters, combiner boxes, and step-up transformers, distributed on the rooftops of factory buildings in the industrial park. The mathematical model of the photovoltaic cells is as follows:

[0052] P3(t) = R(t) * S * P4

[0053] In the formula: P3(t) — photovoltaic power generation at time t;

[0054] R(t) — Irradiance coefficient at time t;

[0055] S—Photovoltaic installed capacity;

[0056] P4 – Rated power of photovoltaic cells per unit installed capacity.

[0057] In this embodiment, preferably, the controllable electrical load includes at least one of the following: freight electric vehicles used for transporting goods in the industrial park, company electric shuttle buses for picking up and dropping off employees, and private electric vehicles owned by residents of the park.

[0058] In this embodiment, the preferred model of the energy storage device is as follows:

[0059] Q1(t)=Q1(t-1)+(P5*η5-P6 / η6)

[0060] In the formula: Q1(t) and Q1(t-1) represent the battery charge at time t and time t-1, respectively;

[0061] η5 and η6 represent the charging and discharging efficiencies of the battery, respectively.

[0062] P5 and P6 represent the battery's charging and discharging power, respectively.

[0063] Q2(t)=Q2(t-1)+(W7*η7-W8 / η8)

[0064] In the formula: Q2(t) and Q2(t-1) represent the heat of the thermal storage device at time t and time t-1, respectively;

[0065] η7 and η8 represent the battery's heat storage and heat release efficiencies, respectively.

[0066] W7 and W8 represent its heat storage and heat release power, respectively.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An industrial park energy scheduling device with source-storage collaborative operation, characterized in that, include: The combined heat and power (CHP) system comprises a gas turbine, a gas boiler, an electric chiller, a photovoltaic power generation system, a thermal energy storage device, an electric energy storage device, and a controllable electrical load. The gas turbine and gas boiler are connected to the thermal storage device and the thermal load. The gas turbine and photovoltaic power generation system are connected to the power system. The power system connects the electric chiller, the electrical load, the controllable electrical load, and the electric energy storage device. The electric chiller is connected to the cooling load. The controllable electrical load is used for peak shaving and valley filling. The heat generated by the gas turbine and gas boiler is used to meet the thermal load demand; any surplus heat is stored in the thermal storage device, which releases heat when the heat source is insufficient. The gas turbine and photovoltaic power generation system are power generation devices in the power system, generating electricity to meet the electricity demand; any surplus electricity is stored in the electric energy storage device, which releases electricity when the power source is insufficient. The electric chiller is a cooling source device that meets the cooling load demand.

2. The industrial park energy scheduling device of source and storage collaborative operation according to claim 1, characterized in that: The controllable electrical loads include at least one of the following: freight electric vehicles used for transporting goods in the industrial park, company electric shuttle buses for picking up and dropping off employees, and private electric vehicles owned by residents of the park.

3. The energy dispatching device for industrial parks with source-storage-load coordinated operation according to claim 1, characterized in that: The energy storage device model is as follows: Q1(t)=Q1(t-1)+(P5*η5-P6 / η6) In the formula: Q1(t) and Q1(t-1) represent the battery charge at time t and time t-1, respectively; η5 and η6 represent the charging and discharging efficiencies of the battery, respectively. P5 and P6 represent the battery's charging and discharging power, respectively. Q2(t)=Q2(t-1)+(W7*η7-W8 / η8) In the formula: Q2(t) and Q2(t-1) represent the heat of the thermal storage device at time t and time t-1, respectively; η7 and η8 represent the battery's heat storage and heat release efficiencies, respectively. W7 and W8 represent its heat storage and heat release power, respectively.

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