Method for detecting state of an automatic capacity checking switch of storage battery

Abstract

The invention discloses a method for detecting state of an automatic capacity checking switch of a storage battery. The method comprises the following steps: 1, simultaneously collecting bus voltagesand positive and negative bus to ground voltages of two sections of direct current systems, and judging whether a bus coupler switch can be closed or not according to measured data of the voltages; 2,executing a closing operation of the bus coupler switch; 3, detecting whether the bus coupler switch is closed in place or not; 4, disconnecting a # 1 bus throw switch; 5, disconnecting a # 1 charging switch; 6, closing a # 1 discharging switch; 7, disconnecting the # 1 discharging switch after discharging is finished; 8, closing the # 1 charging switch; 9, fully charging the storage battery; 10,closing the # 1 bus throw switch; 11, checking whether the # 1 bus throw switch is closed in place or not; and 12, disconnecting the bus coupler switch. According to the method, the problem of directcurrent bus voltage loss caused by misoperation or improper operation during switch operation can be solved. The operation and maintenance efficiency of the direct current system is improved throughthe automatic capacity checking maintenance system of the storage battery, and the operation safety of the system is ensured.

Description

technical field [0001] The invention relates to a method for detecting and judging a storage battery in a power system, in particular to a device and method for detecting the state of an automatic nuclear capacity switch of the storage battery. Background technique [0002] In the power system, the battery pack of the DC power system of the substation can continuously provide working power to the DC system when the AC system loses power, guarantee the normal operation of the protection equipment and the closing mechanism, and can cut off the faulty AC circuit in time to avoid Expansion of power grid accidents. Therefore, it is very important to ensure the reliability of the performance of the battery pack during operation. [0003] Currently, the most accurate way to check battery performance is to perform a check discharge test. According to the requirements of countermeasures and various operation and maintenance regulations, it is necessary to conduct a check discharge ...

AI Technical Summary

Problems solved by technology

[0015] In the above operation steps, if the operation of closing the bus tie switch in the first step is not in place, that is, the contacts of the bus tie switch are not reliably connected, then disconnecting the #1 bus switch will cause the DC bus of section I to lose voltage. unable to supply power to the load

Similarly, if the operation of closing the #1 bus switch in the eighth step is not in place, that is, the contact of the bus switch is not reliably connected, after the bus tie switch is disconnected, the voltage of the I-section DC bus will also be lost, and the load cannot be supplied. powered by

And in accordance with the requirements of the regulations and countermeasures, before closing the bus tie switch, it must be confirmed that the voltage difference between the two busbars does not exceed 5V (to prevent high-current charging and discharging between the two battery groups, resulting in performance degradation), and there is no Insulation reduction (to prevent multi-point grounding of the system after the bus coupler is closed, resulting in protection malfunction / rejection and DC bus short-circuit faults)

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