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Control method of local electric system having generation system and local electric system

A technology of power system and control method, which is applied in the direction of control system, control generator, electrical components, etc., and can solve the problems of low power generation efficiency of binary power generation system, decrease of power generation efficiency of binary power generation system operation rate, etc.

Inactive Publication Date: 2012-10-17
KOBE STEEL LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when the binary power generation system disconnected from the external power supply system is reconnected to the power supply system due to the operation of the anti-backflow relay, it cannot be reconnected to the external power supply system unless the binary power generation system is temporarily stopped.
Therefore, there is a problem that the operation rate of the binary power generation system, in other words, the power generation efficiency will inevitably decrease.
[0010] In addition, although it is also possible to set the generated power generated by the binary power generation system to be small from the beginning in such a way that the anti-backflow relay does not work, the power generation efficiency of the binary power generation system will naturally decrease when the generated power is limited from the beginning. Low

Method used

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  • Control method of local electric system having generation system and local electric system
  • Control method of local electric system having generation system and local electric system
  • Control method of local electric system having generation system and local electric system

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no. 1 Embodiment approach

[0041] The control method of the first embodiment adjusts the amount of power generation supplied to the electric load 2 by changing the circulation amount of the working medium. Specifically, in this control method, the generated power measuring unit 12 for measuring the generated power generated by the generator 8 is provided in advance so that the generated power measured by the generated power measuring unit 12 becomes a predetermined set value of generated power. In this way, the circulation rate of the working medium, that is, the delivery rate of the working medium to the evaporator is changed, thereby adjusting the amount of power generation supplied to the electric load 2 .

[0042] The generated electric power measuring unit 12 is a power meter provided on the wiring 6 that transmits electric power from the generator 8 to the electric load 2, and in the case of the present embodiment, three electric power measuring units 12a to 12c are arranged.

[0043] Such as fig...

no. 2 Embodiment approach

[0060] Next, a method of controlling the local power system 1 according to the second embodiment will be described.

[0061] Such as image 3 As shown, the control method of the local electric power system 1 of the second embodiment is the same as that of the first embodiment. The amount of power generation supplied to the electric load 2 is adjusted by increasing or decreasing the circulating flow rate of the working medium to reduce the power generation amount, but it is not preset Instead of the amount of power generated by the generator 8, the power actually flowing to the backflow prevention relay 5 (supplied power) is actually measured or calculated, and power is generated based on the actually measured or calculated power within a range where backflow does not occur.

[0062] Specifically, in the control method of the local power system 1 of the second embodiment, the power supply measuring means 16 for measuring the power supplied from the external power supply system ...

no. 3 Embodiment approach

[0088] Next, a method of controlling the local power system 1 according to the third embodiment will be described.

[0089] Such as Figure 5 As shown, the local power system 1 of the third embodiment has the following device added to the local power system 1 of the second embodiment: a device for converting the generated power of alternating current (AC) generated by the power generation system 3 into direct current (DC) The converter 18 , the battery 19 that stores the generated power converted to DC by the converter 18 in the DC state, and the inverter 20 that restores the generated power in the DC state stored in the battery 19 to AC. In addition, in the control unit 13, in addition to the circulation amount calculation unit 14 and the pump control unit 15, the power supply measured by the power supply measuring unit 16 for judgment is smaller than a preset value (threshold value) set as a lower limit, or the power supply is supplied. The electric power is larger than a s...

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Abstract

The invention relates to a control method of a local electric system. The local electric system comprises a generation system, an electric load connected with a generator in the generation system and an anti-countercurrent unit for cutting off a countercurrent from the generator to an external electric power supply system. The generator of the generation system cooperates with the load state of the dynamic electric load to adjust the generation amount supplied to the electric load in a way that the generated electric power of the generator is less than the working electric power value of the anti-countercurrent unit. In this way, a countercurrent supplied to an external electric power supply system will not be generated. The running rate and the generation efficiency of the generation system inside the local electric system are then improved.

Description

technical field [0001] The present invention relates to a control technology of a power system (local (local) power system) provided with a power generation system that supplies power to electric loads and installed in a local area such as a factory. Background technique [0002] Conventionally, there has been a binary power generation system as a power generation system that recovers heat from a low-temperature heat source that does not have enough heat to rotate a steam turbine, such as factory waste heat, to generate power. This binary power generation system is attracting attention as a secondary power supply unit to a commercial power system (external power supply system) supplied by a power company. That is, the binary power generation system is suitable as a power supply system included in a power system (local power system) installed in a local area such as a factory. [0003] In such a binary power generation system, it is ideal that the power generation efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46F01K11/00
CPCF01D15/10F01K13/02H02J3/38H02P9/04
Inventor 足立成人松村昌义成川裕高桥和雄
Owner KOBE STEEL LTD
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