A Fault Handling Method for Oilfield Distribution Network Grounded Through Small Resistance

Abstract

The invention relates to a fault processing method for a power distribution network connected with the ground through a small resistor of an oil field. The fault processing method comprises the steps of seeking a position of a fault point when a fault occurs in the power distribution network of the oil field; disconnecting a circuit of the fault point by opening a circuit breaker, and judging whether the fault is a non-permanent fault or not; closing the opened circuit breaker when the fault is a non-permanent fault, and starting oil pumping unit set in a circuit disconnected with a bus in batches; and otherwise starting a power generator of the oil pumping set adjacent to the opened circuit breaker on the circuit disconnected with the bus, and providing an active power for the circuit disconnected with the bus. After the circuit fault is detected, corresponding fault processing is performed according to a type of the fault, so that normal working of the oil pumping unit set can be guaranteed.

Description

Technical field [0001] The invention relates to a fault processing method for an oil field power distribution network grounded by a small resistance. Background technique [0002] In the petroleum industry, oilfield power distribution networks grounded by small resistances generally use a single power source. The radioactive network structure is used to transmit and distribute the pumping unit, that is, multiple pumping units are connected in series to the bus. The pressure drop at the end of the line is large, and the voltage of the pumping unit at the end of the line is relatively low. At the same time, because multiple pumping units are connected in series to the bus, when the circuit of one of the pumping units fails, it may It will cause all the pumping units connected behind it to fail to work normally, and even cause power outages across the entire line, low power supply reliability, and unstable system operation. Summary of the invention [0003] The technical problem to ...

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Problems solved by technology

[0002] In the petroleum industry, the oil field distribution network grounded by a small resistance generally adopts a single power supply, and transmits and distributes power for the pumping unit through a radial network structure, that is, multiple pumping units are connected in series to the busbar. Since the pumping unit line is generally long, the line Therefore, the voltage drop at the end of the line is large, and the voltage of the pumping unit at the end of the line is relatively low; at the same time, since multiple pumping units are connected in series to the bus, when the line of one of the pumping units fails, it may It will cause the pumping units connected behind it to fail to work normally, and even cause a power outage across the line, low reliability of power supply, and unstable operation of the system

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