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Comprehensive energy system of energy hub

A comprehensive energy system and hub technology, applied in energy storage, renewable energy integration, wind power generation, etc., can solve the problem that wind power generation systems and photovoltaic power generation systems cannot stabilize power supply, smooth intermittent power output power fluctuations, and energy storage battery packs It is difficult to wait for problems to achieve the effect of improving automatic adjustment ability, avoiding damage, and reducing over-limit situations.

Inactive Publication Date: 2021-09-21
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the uncertainty of wind and solar energy, the wind power generation system and photovoltaic power generation system cannot provide stable power supply, which makes it difficult for the energy storage battery pack to smooth the fluctuation of intermittent power output power through regular absorption and release of energy

Method used

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  • Comprehensive energy system of energy hub
  • Comprehensive energy system of energy hub
  • Comprehensive energy system of energy hub

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] combine figure 1 , an integrated energy system of an energy hub, comprising a power generation unit, an energy storage battery pack and a control unit, an energy storage battery pack is arranged at the outlet of the power generation unit, the power generation unit is connected to the busbar through a feeder, and the power generation unit includes A wind-electricity, light-electricity complementary power supply system composed of photovoltaic arrays and wind turbines, the control unit switches and adjusts the working state of the energy storage battery pack, protects the energy storage battery pack from overshoot and overdischarge, and at the same time The power generation unit performs power tracking.

[0055] The output end of the wind power generator set is provided with an unloading circuit, which is used as a protection circuit of the wind power generator.

[0056] The energy storage battery pack is a hybrid energy storage battery pack composed of two layers of ene...

Embodiment 2

[0059] combine Figure 1-4 , the electric energy generated by the wind turbine is converted into electric energy for charging the energy storage battery pack through the AC-DC conversion circuit in the wind energy generation circuit under the control of the microcontroller of the controller, and supplied to the load; the photovoltaic array generates The electric energy of the electric energy is converted into electric energy for charging the energy storage battery pack through the DC voltage regulator circuit in the photoelectric power generation circuit, and is supplied to the load under the control of the single chip microcomputer of the controller.

[0060] The controller of the control unit includes a voltage detection circuit module and a current detection circuit module, the electric energy generated by the wind generator set is outputted as a direct current through three-phase rectification, as one channel of the dual input circuit, and the photovoltaic array generates e...

Embodiment 3

[0066] combine Figure 5 , the controller of the control unit adopts the energy storage smoothing control strategy. On the basis of the low-pass filtering smoothing control strategy, the state of charge of the energy storage battery pack is controlled by a variable time constant, and fuzzy control is introduced to improve the SOC. The energy storage smoothing control strategy is based on the existing low-pass filtering smoothing control strategy, controls the SOC variable time constant, and introduces fuzzy control to improve the SOC automatic regulation ability and reduce The over-limit condition of the SOC of the energy storage battery pack.

[0067] The energy storage smooth control strategy includes the following steps:

[0068] A1. According to the capacity of the energy storage battery pack, adjust the smoothing time constant τ of the first-order low-pass filter online in real time;

[0069] A2. The total power output value P of the power generation unit wp After firs...

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Abstract

The invention relates to a comprehensive energy system of an energy hub, which comprises a power generation unit, an energy storage battery pack and a control unit, wherein the energy storage battery pack is arranged at the outlet of the power generation unit, the power generation unit is connected to a bus through a feeder line, and the control unit switches and adjusts the working state of the energy storage battery pack, the energy storage battery pack is protected from overshoot and overdischarge, power tracking is conducted on the power generation unit, a controller of the control unit adopts an energy storage smooth control strategy, on the basis of a low-pass filtering smooth control strategy, variable time constant control is performed on the charge state of the energy storage battery pack, and fuzzy control is introduced. According to the comprehensive energy system provided by the invention, a wind-solar complementary power generation system is formed, and an energy storage smooth control strategy is adopted, so that the energy storage battery pack stabilizes fluctuation of wind power and solar power generation output power, and the service life of the energy storage battery pack is considered.

Description

technical field [0001] The invention belongs to the technical field of multi-energy systems, and in particular relates to an integrated energy system of an energy hub. Background technique [0002] The traditional large power grid mainly adopts the power supply mode of centralized power generation and long-distance power transmission. In the event of a power grid accident, the scope of influence will be expanded, and it is difficult to meet the user's increasingly high safety and reliability requirements for electric power. Under the common pressure of problems and power demand, new energy power generation has become an important method to solve these contradictions. Combining distributed power sources into a micro-grid system for joint power generation and control can effectively solve the characteristics of distributed power sources such as dispersion and random changes. And can improve the benefits of distributed generation. Microgrid is a small power generation and dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/46H02H9/00H02J9/06
CPCH02J3/32H02J3/466H02H9/00H02J9/061H02J2300/24H02J2300/28Y02E70/30Y02E10/76Y02B10/70Y02E10/56
Inventor 曹翀郑罡南钰赵鑫秦泽华王宏研于永哲王方苏
Owner STATE GRID CORP OF CHINA
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