Distribution transformer substation monitoring practical method based on distribution network system

Abstract

The invention relates to a distribution substation monitoring practical method based on a distribution network system. At a power distribution transformer substation terminal, a bus of a single main transformer is additionally provided with a triangular coil PT with an opening to obtain a zero-sequence voltage; 10V is taken as a 3U0 value to trigger an upload out-of-limit action remote signaling signal condition, and an out-of-limit action remote signaling signal is linked with an analog switch, so when the out-of-limit action remote signaling signal appears, the analog switch maintains an upload opening remote signaling signal; by combining a distribution network system research and judgment popup principle, setting is carried out in a distribution network system database to realize unlocalized monitoring; at a main station terminal, a distribution network system database is improved, main transformer tapping point position signals and oil temperature data are collected on site, and display and remote control on a distribution network system are achieved. The method can be applied to power distribution substations in different stages, can give full play to the effect of the powerdistribution transformer, and has popularization and application values.

Description

technical field [0001] The invention relates to a practical method for monitoring a distribution substation based on a distribution network system. Background technique [0002] Distribution-based substations are also known as simplified substations. Compared with conventional substations, there is no protection signal transmission scheme. Since the promotion and construction, after the construction of distribution-based substations in many places, there is no control mechanism scheme. After construction, there is no need to send a protection signal, only a three-remote switch is installed at the #1 pole position of the 10kV outgoing line to control the distribution network system. In the power grid dispatching, only an in-station wiring diagram that is not associated with the four-remote information is kept in the main network system. The protection monitoring function is missing. The power grid dispatching system is divided into main network dispatching and distribution n...

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Problems solved by technology

[0006] Disadvantages of the current distribution substation scheme of the power grid system: 1. There is no protection signal transmission function, and it is only used as an emergency backup measure for power transfer applications, and the utilization rate is extremely low; 2. When the distribution substation is in operation, if the outgoing line loses ground, Dispatch cannot be monitored, in case someone passes by, there is a potential safety hazard; 3. Only three remote switches are installed on pole #1 of each 10kV outgoing line, and there is no way to control the equipment in the station, and it is in an uncontrolled state; 4. The voltage cannot be adjusted, There is no means to ensure power quality for power supply users; 5. There is no signal transmission scheme, which does not meet the signal access requirements. The State Grid Corporation requires that the substation information must meet the network security protection requirements, which is a management gap; 6. The power distribution cannot be fully utilized The function of the substation, if there is a mature plan, after the distribution substation is promoted, its advantages such as short construction period, quick effect, small land occupation and small investment will be fully reflected

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