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

A technology for power distribution network faults and small resistance grounding, applied in electrical components, emergency protection circuit devices, etc., can solve the problems of unstable system operation, failure of pumping units, low reliability of power supply, etc., to reduce faults and power outages Losses, improve the efficiency of fault repair, reduce the effect of the scope of power outages

CN107171296BActive Publication Date: 2019-11-15CHINA PETROLEUM & CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-11-15

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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.
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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 ...

Examples

Embodiment Construction

[0025] As shown in the figure, a fault handling method for oilfield power distribution network grounded by a small resistance includes the following steps:

[0026] First, the oilfield distribution network is set up. The oilfield distribution network is composed of a bus connected to the power source and a number of pumping units connected in series connected to the bus. The adjacent two groups of pumping units are connected by a circuit breaker; each pumping unit is configured for power generation. Each pumping unit is preset with several pumping units;

[0027] Secondly, when the oilfield power distribution network is working normally, the generator of the end pumping unit provides reactive power for the end pumping unit, and the generators of the pumping unit other than the end pumping unit are in hot standby;

[0028] Third, when a fault is detected in the oilfield power distribution network, find the location of the fault point; disconnect the line of the fault point by opening ...