Method for automatic putting new type backup power source into use under PC control
A backup power supply and automatic input technology, applied in the direction of emergency power supply arrangements, electrical components, circuit devices, etc., can solve problems such as not fully conforming to the basic principles, poor adaptability, and unguaranteed operational reliability
Inactive Publication Date: 2009-03-04
STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO +1
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Problems solved by technology
However, the control method adopted by the existing microcomputer-controlled backup power automatic input device is completely designed according to the action flow proposed by people, and does not fully conform to the basic principle of automatic backup power input. Compared with electromagnetic equipment, its action principle is complicated. , The operating mode is limited, but it loses the advantages that the computer backup self-injection should have
In particular, the existing microcomputer-controlled backup power automatic input device has poor adaptability when it is connected to a local power plant. Since the protection lock is not separated, when a main transformer fails, the automatic input of the backup power may be completely blocked. , when the two substations in one line are running, the whole substation will lose power, so its operational reliability cannot be guaranteed
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[0089] image 3 The description of the control word in is as follows: (0, exit; 1 input)
[0090] control word name control word Remark Open the gate and check the pressure FZJY Closing check without pressure TTW Main transformer low voltage side voltage input MB1 Main transformer medium voltage side voltage input MB2
[0091] image 3 The middle letters are explained as follows:
[0092] I1<Ifzd—indicates that the power supply current of the first circuit breaker 1DL is less than the no-current setting value, that is, the first circuit breaker 1DL has no current;
[0093] U1<Ufzd—indicates that the power supply voltage of the first circuit breaker 1DL is less than the no-voltage set value, that is, the first circuit breaker 1DL has no voltage;
[0094] U2>Ufyzd—indicates that the power supply voltage of the second circuit breaker 2DL is greater than the voltage setting value of the opening detection, that is, the second...
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The present invention relates to a new microcomputer-controlled automatic switching-on method of stand-by power supply, which includes two path power supplies, two breakers of 1DL and 2DL being connected in series with the two path powr supplies separately and two sets of main transformers being connected with them separately as well as a breaker of 3DL being connected between the powre supplies of two path. Its control method includes trip control of breaker 1DL and breaker 2 DL, switching-on charge-discharge control of breaker 1DL, breaker 2DL and breaker 3DL, switching-on control of breaker DL, breaker 2DL and breaker 3DL, and abnormal signal control.
Description
technical field [0001] The invention belongs to the control technology of electric power transmission and distribution, and relates to a method for automatic input of a novel microcomputer-controlled standby power supply. Background technique [0002] At present, there are two types of automatic input devices for backup power in substations: electromagnetic and microcomputer. The electromagnetic backup power automatic input device needs to control the backup power automatic input process through a large number of relays and other mechanical and electrical devices, which occupies a large space, high equipment cost, troublesome maintenance, and is difficult to realize remote control. The microcomputer-controlled backup power automatic input device controls the automatic input process of the backup power through a microcomputer program, which has low cost and is easy to realize remote control. However, the control method adopted by the existing microcomputer-controlled backup ...
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IPC IPC(8): H02J9/06
Inventor 汤大海
Owner STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO