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Orderly power utilization control method for large-scale electric heat pumps based on [mu]PMU device

An electric heat pump, a large-scale technology, applied in the field of orderly power consumption control of large-scale electric heat pumps, can solve the problems of irregular start-up shocks, electric heat pump start-up failures, poor economy, etc. Controls the start-up sequence, reducing the effect of steady state power

Inactive Publication Date: 2020-12-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Affected by the irregular operation of the electric heat pump and the start-up shock, the instantaneous fluctuation of the three-phase voltage can easily exceed the power quality regulations, and the serious voltage drop will cause the start-up failure of the electric heat pump. The start-up shock not only affects the power quality of the low-voltage distribution network, It may make the electric heat pump itself unable to start, and may also affect the operation and start of other electric heat pumps and other electrical equipment
The existing technology guarantees power consumption through extensive construction and transformation of the distribution network, but this method is not only economical, but also has a long construction period and is not suitable for practical applications.

Method used

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  • Orderly power utilization control method for large-scale electric heat pumps based on [mu]PMU device
  • Orderly power utilization control method for large-scale electric heat pumps based on [mu]PMU device
  • Orderly power utilization control method for large-scale electric heat pumps based on [mu]PMU device

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] 1. Modeling of electric heat pump heating system

[0057] The main internal components of the electric heat pump unit are evaporator, compressor, four-way valve, condenser, and inflation valve. Among them, the compressor, condenser and evaporator are the main heat exchange and energy consumption components of the electric heat pump unit:

[0058] A. Compressor: It converts mechanical energy into internal energy of fluid by continuously rotating and doing work. It is called the heart of the electric heat pump unit. The compressor is the power source in the refrigerant cycle. The rotor of the compressor rotates to do work to adiabatically compress the refrigerant vapor from the evaporator, and continuously push the vapor with higher pressure into the condenser.

[0059] B. Evaporator and condenser: They are important heat exchange components in the electric heat pump unit. The evaporator is a process in which the refrigerant and the heat source medium convectively evapo...

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Abstract

The invention discloses an orderly power utilization control method for large-scale electric heat pumps based on a [mu]PMU device. The method comprises the steps of: selecting a characteristic quantity by using the quick and accurate measurement data of a [mu]PMU and combining an electric heat pump model and starting characteristics, and formulating a characteristic criterion for the startup stateof the electric heat pumps; and then carrying out orderly power utilization control on electric heat pump load groups in three working conditions according to power constraints coupled by a power distribution network voltage constraint model considering the cluster electric heat pumps. According to the method, the electric heat pumps are controlled to shut down orderly, steady-state power is reduced, a startup sequence is controlled, and start-up shock superposition out-of-limit of the electric heat pumps is avoided.

Description

technical field [0001] The invention relates to a method for controlling electricity consumption of an electric heat pump, in particular to a method for controlling the orderly electricity consumption of a large-scale electric heat pump based on a μPMU device. Background technique [0002] The electric heat pump is a heat pump system that drives the mechanical operation of the heat pump with electric energy. It has the advantages of wide application range, low operating cost, stable performance and environmental protection. It has been widely used in housing heating and hot water supply. The characteristics of concentrated power consumption by users have a significant impact on the daily peak-to-valley difference and seasonal peak-to-valley difference, especially in the heating season when the load increases sharply, coupled with the irregularity of residents' heating and travel, making the distribution network load peak The valley difference becomes larger, and the load thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F25B49/02G06F30/20G06F17/13G06F17/16G06F111/04
CPCF25B30/02F25B49/02G06F17/13G06F17/16G06F30/20G06F2111/04
Inventor 余昆陈星莺
Owner HOHAI UNIV