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Group control heat pump-based power fluctuation stabilizing method and system for micro-grid tie line

A tie-line power and micro-grid technology, which is applied in AC network load balancing, reducing/preventing power oscillation, lighting and heating equipment, etc., can solve the problem of single operation mode of electrothermal conversion elements, and has not yet realized unified coordination and deep coupling of micro-grids, etc. problem, to achieve the effect of power fluctuation

Active Publication Date: 2017-06-13
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] The current research uses the electrothermal conversion element as the energy exchange interface between the power grid and the thermal network, and has made some breakthroughs in the technical level of the fluctuating power control of the microgrid tie line. Unified coordination and deep coupling of two energies

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  • Group control heat pump-based power fluctuation stabilizing method and system for micro-grid tie line

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Embodiment 1

[0035] like figure 2 , image 3 and Figure 4 As shown, this embodiment relates to a method for suppressing power fluctuations of microgrid tie lines based on group control heat pumps, including the following steps:

[0036] S 1 , according to the microgrid tie line power smoothing target P Tline (t)-P Tline0 (t)=P ESS (t)+ΔP HP (t), sort the priority of the available electric heat pumps in the electric heat pump group through the electric heat pump cluster control algorithm, switch the switch state of the electric heat pump, and stabilize some power fluctuations;

[0037] S 101 , when P Tline (t)-P Tline0 When (t) > 0, determine the sequence number pointer k of the electric heat pump switched from the off state to the on state 1 =min{[(P Tline (t)-P Tline0 (t)) / P HPN ],N HP，1 (t)}, to get the serial number range that needs to turn on the electric heat pump; when P Tline (t)-P Tline0 When (t)2 =min{[(P Tline0 (t)-P Tline1 (t)) / P HPN ],N HP，2 (t)}, get the ...

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Abstract

The invention provides a group control heat pump-based power fluctuation stabilizing method and system for a micro-grid tie line in the technical field of electric and thermal combined micro-grids. The method comprises the steps of determining to-be-opened or closed electric heat pump serial number intervals according to a power smoothing target of the micro-grid tie line; sorting the state switching priority of electric heat pumps in two serial number intervals on the basis of the user comfort, calculating state switching duration of various sorted electric heat pumps of which the on-off states are switched, if the duration is smaller than a lower limit of the state switching duration of each electric heat pump, keeping the electric heat pump in an original running state, and or else, carrying out on-off state switching on the electric heat pumps and stabilizing partial power fluctuation; and finally stabilizing the remaining power fluctuation, stabilizing a high-frequency component after first-order filtering through output of a storage battery and carrying out output distribution on a low-frequency component in the electric heat pumps and the storage battery for stabilization. Inhibition of renewable energy power fluctuation is achieved on the premise of ensuring that room temperature of a user is in a reasonable range.

Description

technical field [0001] The present invention relates to a technology in the field of electric-heat combined microgrid, in particular to a method and system for stabilizing power fluctuations of tie-lines of microgrid based on group control heat pumps. Background technique [0002] With the rapid development of the energy Internet, comprehensive planning and multiple interactions of cold, heat, electricity, gas and other energy sources to form an integrated energy system with multi-energy synergy characteristics are current research hotspots. However, energy supply systems such as heat power grids, power grids, and gas grids are currently characterized by independent design, planning, and independent operation. [0003] The current research uses the electrothermal conversion element as the energy exchange interface between the power grid and the thermal network, and has made some breakthroughs in the technical level of the fluctuating power control of the microgrid tie line. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/32F25B49/02
CPCY02E70/30Y02P80/14H02J3/24F25B49/02H02J3/32
Inventor 施金晓黄文焘邰能灵
Owner SHANGHAI JIAO TONG UNIV
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