Power generation method and system of hybrid power generator

Abstract

The invention relates to the technical field of generators, in particular to a hybrid generator power generation method and system.The power generation method comprises the following steps that the real-time electric quantity of a storage battery, the actual electric energy demand of a user and the current actual output electric energy are obtained, and the electric energy difference value between the actual electric energy demand of the user and the current actual output electric energy is calculated; based on the electric quantity of the storage battery and the electric energy difference, controlling the battery unit and the DC power generation unit to output electric energy; the method comprises the following steps: acquiring a resident power distribution load curve, dividing one day into a power consumption peak period, a power consumption valley period and a normal power consumption period based on the resident power distribution load curve, and improving the ratio of the power generation electric energy in the power consumption valley period to the power generation electric energy in one day based on the actual power consumption requirement of a user. The power generation energy consumption can be reduced, the service life of the generator is prolonged, and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and in particular to a hybrid generator power generation method and system. Background Art

[0002] Traditional generator sets, as an important part of power supply, play an indispensable role in many fields such as industrial production, emergency backup power supply, and power supply in remote areas. Most of these units rely on internal combustion engine technology, among which diesel and gasoline engines are the most common as power sources to drive generators to generate electricity. However, in this power generation process, it is inevitably accompanied by high energy consumption.

[0003] Specifically, diesel and gasoline engines consume a large amount of fossil fuels, such as diesel and gasoline, during the combustion process. These energy resources are not only limited but also non-renewable. During the combustion process, the chemical energy in the fuel is converted into mechanical energy, and then converted into electrical energy through the generator, but this conversion process is not completely efficient. Part of the energy is dissipated into the environment in the form of heat energy during the combustion process, and part of it is lost during the mechanical transmission and generator conversion process, resulting in relatively low overall energy utilization.

[0004] In addition, with the continuous growth of global energy demand and the increasing awareness of environmental protection, the high energy consumption and low efficiency of traditional generator sets have become increasingly prominent. High energy consumption not only means greater economic costs, but also increases the pressure on natural resources. At the same time, the exhaust gas emissions generated during the combustion process also pollute the environment, including the emission of greenhouse gases such as carbon dioxide, which exacerbates the challenge of global climate change. Summary of the invention

[0005] In order to solve the technical problems of excessively high power generation energy consumption and low power generation efficiency of traditional generators, the present invention provides a hybrid generator power generation method and a hybrid generator power generation system.

[0006] The technical solution adopted by a hybrid generator power generation method in this application is: A hybrid generator power generation method, the hybrid generator includes a battery unit and a DC power generation unit, comprising the following steps: Obtain the real-time power of the battery, the actual power demand of the user and the actual output power at the moment, calculate the power difference between the actual power demand of the user and the actual output power at the moment, and control the battery unit and the DC power generation unit to output power based on the power of the battery and the power difference; Obtain the residential power distribution load curve, divide the day into peak power consumption period, valley power consumption period and normal power consumption period based on the residential power distribution load curve, and increase the ratio of power generation during valley power consumption period to power generation during the day based on the actual power consumption requirements of users.

[0007] As a preferred implementation of a hybrid generator power generation method, based on the battery power and power difference, controlling the battery unit and the DC power generation unit to output power includes: When the battery power is higher than the minimum threshold, the battery unit is controlled to output power individually; When the battery power is lower than the minimum threshold and higher than the limit threshold, and the limit threshold is lower than the minimum threshold, the DC power generation unit and the battery unit are controlled to output electric energy; When the battery power is lower than the limit threshold and the power difference is greater than or equal to 0, the DC power generation unit and the battery unit are controlled to output power; When the battery power is lower than the limit threshold and the electric energy difference is less than 0, the DC power generation unit is controlled to output electric energy alone, so that the DC power generation unit charges the battery unit.

[0008] As a preferred implementation of a hybrid generator power generation method, based on the actual power consumption requirements of users, increasing the ratio of power generation during the off-peak period to power generation in a day includes: Based on the actual electricity demand of users, the power generation time during the low-power consumption period in the daily power generation time is increased and / or the power generation power during the low-power consumption period is increased.

[0009] As a preferred implementation of a hybrid generator power generation method, the minimum threshold is 60% and the limit threshold is 20%.

[0010] A technical solution adopted by a hybrid generator power generation system in this application is: A hybrid generator power generation system uses any one of the hybrid generator power generation methods described above. The hybrid generator power generation system includes a battery unit, a DC power generation unit, an inverter unit and an output unit. The battery unit is connected to the inverter unit, the DC power generation unit is connected to the inverter unit, and the inverter unit is connected to the output unit.

[0011] As a preferred implementation of a hybrid generator power generation system, the DC power generation unit includes an internal combustion engine, a DC power generation controller and a generator, and the internal combustion engine can drive the generator to work under the control of the DC power generation controller.

[0012] As a preferred implementation of a hybrid generator power generation system, the output unit includes a control and output panel, which is provided with an output interface, a DC / DC conversion module, a pure electric mode switch and a hybrid electric mode switch.

[0013] As a preferred implementation of a hybrid generator power generation system, the inverter unit includes a current detector and an inverter body.

[0014] The beneficial effects of the present invention include: This application can intelligently control the battery unit and DC power generation unit to output power based on the battery power and power difference, and has multiple power output modes, which can reduce power consumption, extend the service life of the generator, and improve power generation efficiency. In addition, while meeting the actual power demand of users, power generation is carried out as much as possible during the off-peak period, so as to achieve the purpose of shifting peaks and filling valleys, actively avoiding peaks, and alleviating the pressure of tight power supply during peak load periods, and improving the load rate and overall benefits of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 Schematic diagram of a hybrid generator power generation system in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] A hybrid generator power generation method, the hybrid generator includes a battery unit and a DC power generation unit, comprising the following steps: Obtain the real-time power of the battery, the actual power demand of the user and the actual output power at the moment, and calculate the power difference between the actual power demand of the user and the actual output power at the moment; When the battery power is higher than the minimum threshold, it proves that the battery power is full. At this time, the battery unit is controlled to output power individually to reduce power generation energy consumption; When the battery power is lower than the minimum threshold and higher than the limit threshold, the limit threshold is lower than the minimum threshold, the minimum threshold may be 60%, and the limit threshold may be 20%, the DC power generation unit and the battery unit are controlled to output electric energy, and the DC power generation unit is used to assist in power generation to improve power generation efficiency; When the battery power is lower than the limit threshold and the power difference is greater than or equal to 0, the DC power generation unit and the battery unit are controlled to output power to improve power generation efficiency and meet the actual power demand of users; When the battery power is lower than the limit threshold and the electric energy difference is less than 0, the DC power generation unit is controlled to output electric energy alone, so that the DC power generation unit charges the battery unit, so that the generator maintains a relatively stable operating condition, reduces the loss of the generator, and improves the utilization rate of electric energy.

[0019] While outputting electric energy, obtain the load curve of residential power distribution, divide a day into peak power consumption period, valley power consumption period and normal power consumption period based on the load curve of residential power distribution, and increase the power generation time of valley power consumption period in a day's power generation time, increase the power generation power of valley power consumption period, or increase the power generation time of valley power consumption period in a day's power generation time and the power generation power of valley power consumption period based on the actual power consumption requirements of users. Generate electricity during valley power consumption period to achieve the purpose of shifting peak loads and filling valleys, actively avoiding peak loads, relieve the pressure of tight power supply during peak load period, and improve the load rate and overall benefits of the power system.

[0020] Embodiment 2: This embodiment proposes a hybrid generator power generation system, which uses a hybrid generator power generation method as described in Example 1. The hybrid generator power generation system includes a battery unit, a DC power generation unit, an inverter unit and an output unit. The battery unit is connected to the inverter unit, the DC power generation unit is connected to the inverter unit, and the inverter unit is connected to the output unit.

[0021] The DC power generation unit includes an internal combustion engine, a DC power generation controller and a generator. The internal combustion engine can drive the generator to work under the control of the DC power generation controller.

[0022] The output unit includes a control and output panel, which is provided with an output interface, a DC / DC conversion module, a pure electric mode switch and a hybrid electric mode switch.

[0023] The inverter unit includes a current detector and an inverter body.

[0024] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hybrid generator power generation method, the hybrid generator comprising a battery unit and a DC power generation unit, characterized in that: The following steps are involved: Obtain the real-time power of the battery, the actual power demand of the user and the actual output power at the moment, calculate the power difference between the actual power demand of the user and the actual output power at the moment, and control the battery unit and the DC power generation unit to output power based on the power of the battery and the power difference; Obtain the residential power distribution load curve, divide the day into peak power consumption period, valley power consumption period and normal power consumption period based on the residential power distribution load curve, and increase the ratio of power generation during valley power consumption period to power generation during the day based on the actual power consumption requirements of users.

2. A hybrid generator power generation method according to claim 1, characterized in that: Based on the battery charge and energy difference, controlling the battery unit and the DC power generation unit to output electrical energy includes: When the battery power is higher than the minimum threshold, the battery unit is controlled to output power individually; When the battery power is lower than the minimum threshold and higher than the limit threshold, and the limit threshold is lower than the minimum threshold, the DC power generation unit and the battery unit are controlled to output electric energy; When the battery power is lower than the limit threshold and the power difference is greater than or equal to 0, the DC power generation unit and the battery unit are controlled to output power; When the battery power is lower than the limit threshold and the electric energy difference is less than 0, the DC power generation unit is controlled to output electric energy alone, so that the DC power generation unit charges the battery unit.

3. A hybrid generator power generation method according to claim 1, characterized in that: Based on the actual electricity demand of users, the ratio of electricity generated during the off-peak period to the daily electricity generated is increased by: Based on the actual electricity demand of users, the power generation time during the low-power consumption period in the daily power generation time is increased and / or the power generation power during the low-power consumption period is increased.

4. A hybrid generator power generation method according to claim 1, characterized in that: The minimum threshold is 60% and the maximum threshold is 20%.

5. A hybrid generator power generation system, characterized in that: Using any one of the hybrid generator power generation methods as described in claims 1-4, the hybrid generator power generation system includes a battery unit, a DC power generation unit, an inverter unit and an output unit, the battery unit is connected to the inverter unit, the DC power generation unit is connected to the inverter unit, and the inverter unit is connected to the output unit.

6. A hybrid generator power generation system according to claim 5, characterized in that: The DC power generation unit includes an internal combustion engine, a DC power generation controller and a generator. The internal combustion engine can drive the generator to work under the control of the DC power generation controller.

7. A hybrid generator power generation system according to claim 5, characterized in that: The output unit includes a control and output panel, which is provided with an output interface, a DC / DC conversion module, a pure electric mode switch and a hybrid electric mode switch.

8. A hybrid generator power generation system according to claim 5, characterized in that: The inverter unit includes a current detector and an inverter body.

Images