Feeder protection alarm system on same bus in transformer substation
A feeder protection and alarm system technology, applied in the field of substations, can solve problems such as failure to find alarms
Pending Publication Date: 2021-08-24
SHENZHEN POWER SUPPLY BUREAU
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Problems solved by technology
[0005] However, when a certain feeder (such as feeder F01 / ) is overhauled, the alarm signal (such as the control circuit disconnection signal) of the protection and control device L / on the overhauled feeder (such as feeder F01 / ) will be sent out for a long time, making other operating feeders ( For example, any one of the feeders F02 / ~Fn / ) the alarm signal of the protection measurement and control device L / is covered by the alarm signal sent by the maintenance feeder, resulting in the integrated automatic system always maintaining the alarm status of the original maintenance feeder, but unable to detect the alarm status of other operating feeders alarm
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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] like figure 2 and image 3 As shown, in the embodiment of the present invention, a feeder protection alarm system on the same bus in a substation is proposed, including a common measurement and control device M and multiple protection measurement and control devices L connected thereto; each protection measurement and control device L corresponds to Set on a feeder (such as one of F01~Fn) connected to the same busbar, and have at least one alarm signal on it, including but not limited to protection device failure signal and control circuit disconnection signal;
[0025] The feeder protection and alarm system also includes a plurality of switching switches K1~Kn, which are all arranged on the line connected to the corresponding protection measurement and c...
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The invention provides a feeder protection alarm system on the same bus in a transformer substation. The feeder protection alarm system comprises a public measurement and control device and a plurality of protection measurement and control devices connected with the public measurement and control device; each protection measurement and control device is correspondingly arranged on one feeder line connected below the same bus, and at least one alarm signal is configured on each protection measurement and control device; and the system further comprises a plurality of on-off switches which are arranged on lines connected with the corresponding protection measurement and control devices and the public measurement and control device. Each on-off switch is used for allowing or shielding alarm signals formed by the corresponding protection measurement and control device to be sent to the public measurement and control device through on-off state control. According to the invention, the alarm signal of the maintenance feeder line can be shielded when the feeder line is maintained, so that the alarm signals of other operation feeder lines are ensured to be correctly sent out, and on-site monitoring by operators is not needed.
Description
technical field [0001] The invention relates to the technical field of substations, in particular to a feeder protection and alarm system on the same bus in a substation. Background technique [0002] Power distribution equipment below 35kV in substations (such as feeders) usually adopts a secondary device that integrates protection functions and measurement and control functions (referred to as protection measurement and control devices) to complete substation control, protection, anti-mislocking, unattended and measurement monitoring and other functions. [0003] Taking China Southern Power Grid as an example, a substation with 4 main transformers is usually equipped with 72 protection and control devices, and each protection and control device is equipped with at least 2 protection devices such as "protection device failure or abnormality" and "control circuit disconnection". a warning signal. Assuming that each protection and testing device is equipped with 3 alarm sig...
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Login to View More IPC IPC(8): H02H7/26H02H3/04
CPCH02H7/261H02H7/262H02H3/04
Inventor 赖天德吴海涛郑庆梦王世祥王迪梁曦匀田灵毓
Owner SHENZHEN POWER SUPPLY BUREAU