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Rechargeable battery for transformer substation, charging power supply, secondary system, transformer substation and method

A technology of rechargeable battery and secondary system, which is applied in battery circuit devices, battery load switching, measuring electricity, etc. It can solve problems such as short calendar life, harsh operating temperature, and DC bus voltage loss, so as to ensure system reliability and guarantee Calendar life, the effect of reducing access

Inactive Publication Date: 2020-12-01
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the characteristics of lithium-ion batteries, the present invention designs the lithium-ion battery DC power supply system from the electrical structure, and solves the problem of harsh operating temperature, short calendar life, and DC bus voltage loss caused by battery open circuit by replacing the traditional lead-acid battery DC power supply system. question

Method used

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  • Rechargeable battery for transformer substation, charging power supply, secondary system, transformer substation and method
  • Rechargeable battery for transformer substation, charging power supply, secondary system, transformer substation and method
  • Rechargeable battery for transformer substation, charging power supply, secondary system, transformer substation and method

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Experimental program
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Effect test

Embodiment 1

[0050] see image 3 As shown, the present invention provides a rechargeable battery for substation, including charging contactor S0, discharging diode D0, parallel contactors S1, S2, S3, nuclear capacity contactors K1, K2, K3, string circuit breakers Q1, Q2 , Q3, the first battery cluster, the second battery cluster and the third battery cluster.

[0051]One end of the charging contactor S0 is connected to the DC bus, and the other end is connected to one end of the parallel contactors S1, S2, and S3; the discharge diode D0 is set in parallel with the charging contactor S0; the other ends of the parallel contactors S1, S2, and S3 are respectively connected to One end of the string circuit breakers Q1, Q2, Q3, and the other end of the string circuit breakers Q1, Q2, Q3 are respectively connected to the positive electrodes of the first battery cluster, the second battery cluster and the third battery cluster.

[0052] The nuclear container is an AC / DC bidirectional inverter, an...

Embodiment 2

[0061] In this embodiment, a rechargeable battery for a substation, on the basis of Embodiment 1, also includes a battery management system; the battery management system is connected to the charging contactor S0, each parallel contactor (S1, S2, S3), each core capacity Contactors (K1, K2, K3), each string breaker (Q1, Q2, Q3) and each battery cluster.

[0062] Used to control the separation / combination of the charging contactor S0, each parallel contactor (S1, S2, S3), each nuclear capacitor contactor (K1, K2, K3), each string circuit breaker (Q1, Q2, Q3) brake. Specifically, it is used to control the parallel contactor to be connected when the corresponding lithium-ion battery cluster is charging or discharging, and to be disconnected when it is not working; it is used to control the core-capacity contactor to be connected when corresponding to the core capacity of the lithium-ion battery cluster, and the core-capacity Turn off after completion; it is used to control the st...

Embodiment 3

[0066] The present invention also provides a charging power supply; the charging power supply includes:

[0067] The charging module has an input end connected to an AC power supply, and an output end connected to a DC bus; it is used to charge a substation rechargeable battery described in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a rechargeable battery for a transformer substation, a charging power supply, a secondary system, the transformer substation and a method. The rechargeable battery for the transformer substation is characterized by comprising N groups of lithium ion battery clusters, wherein each group of battery clusters is connected with a parallel operation contactor, N is a positive integer greater than or equal to 2, the N parallel operation contactors are connected with a direct-current busbar through the same discharge diode D0, and the discharge diode D0 is connected in parallelwith a charging contactor S0. According to the invention, multiple paths of battery systems are connected in parallel and mutually standby, each path of battery pack string can be freely separatedmerged, and the total capacity is kept unchanged; through multi-stage battery management, battery pack strings are separatedmerged; the volume checking operation is convenient to finish during separation; and an intermittent charging strategy is executed by fully utilizing the characteristic of low self-discharge rate of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a rechargeable battery for a substation, a charging power supply, a secondary system, a substation and a method. Background technique [0002] The DC power supply system is an important part of the substation. It is the power supply for secondary systems such as relay protection control devices, automation devices, high-voltage circuit breaker opening and closing mechanisms, communications, metering, and emergency lighting. It is mainly composed of two batteries and rectifiers. It is composed of some parts, and its typical structure diagram is as follows figure 1 shown. Under normal circumstances, the DC power system is provided by the station AC power through the rectification device. When there is a sudden AC power failure, the station DC power system is powered by the battery pack, and the battery pack becomes the only DC power supply. Therefore, th...

Claims

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Application Information

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IPC IPC(8): H02J7/34H02J7/00H02J7/02G01R31/382
CPCG01R31/382H02J7/0068H02J7/02H02J7/34
Inventor 黎可渠展展金翼胡晨于冉穆居易孙召琴王绥军刘超群刘家亮惠东
Owner CHINA ELECTRIC POWER RES INST
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