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

A technology of switching state and detection method, applied in circuit breaker testing, measuring electricity, measuring devices, etc., can solve the problems of unloaded power supply, loss of voltage of I-section DC bus, and unreliable contact of contacts, so as to ensure safety. , the effect of improving operation and maintenance efficiency and avoiding social and economic losses

Inactive Publication Date: 2020-02-14
DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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,

Method used

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

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Embodiment 1

[0046] 1. Simultaneously collect busbar voltage and positive and negative busbar-to-ground voltage of the two DC systems, and judge whether the bus tie switch can be closed through the measured data of the voltage;

[0047] 2. Using the method of load bridging, before the remote operation of the switch, connect the load in series between the positive and negative of the two DC bus bars, and then check whether the switching operation is in place by detecting the current flowing through the load.

Embodiment 2

[0049] Such as figure 2 As shown, the wiring operation mode of a battery automatic nuclear capacity switch state detection method is applied in the battery nuclear capacity maintenance. The monitoring device in the figure is the carrier realized by the monitoring method proposed by the patent of the present invention. The series connection positions of collection and load jumper are taken from the outlet side of #1 and #2 bus switch.

Embodiment 3

[0051] Such as image 3 As shown, the internal composition of a battery automatic nuclear capacity switch state detection device includes a resistance voltage divider acquisition circuit, a load jumper circuit, an acquisition control circuit, a CPU processor and a communication unit.

[0052]The resistor divider acquisition circuit realizes the acquisition of the bus voltage and the positive and negative bus voltage to ground. There is no special requirement for the bus acquisition circuit, as long as it meets the voltage acquisition range of 0-300V. The voltage-dividing resistors for positive and negative busbars to ground voltage collection are equivalent to a set of balance bridge resistances. Since the insulation status monitoring of the insulation monitoring device in the on-site DC power supply system will be affected by the external balance bridge resistance, the voltage-dividing resistors R3 and R5 are connected to each other. The value selection must be above 500kΩ; c...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01R31/327G01R31/385G01R31/396
CPCG01R31/327G01R31/385G01R31/396
Inventor 高靖尧李春陈瑜徐国俊白汝欣孙鹏赵传立刘昌泽张羽诺邢汐源
Owner DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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