CN216959293U

CN216959293U - Circuit breaker delay control circuit for offshore wind generating set

Info

Publication number: CN216959293U
Application number: CN202123229260.0U
Authority: CN
Inventors: 汪奎; 唐彬伟; 刘文亮
Original assignee: MingYang Smart Energy Group Co Ltd
Current assignee: MingYang Smart Energy Group Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-07-12
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a circuit breaker delay control circuit for an offshore wind generating set, which comprises a control power supply loop and a closing delay circuit, wherein the control power supply loop is connected with the low-voltage side of a booster transformer of the wind generating set and used for supplying power to the closing delay loop and the circuit breaker, and the closing delay circuit is connected with the circuit breaker and used for controlling the circuit breaker to delay closing. The utility model can solve the problem of damage to auxiliary equipment of the wind generating set caused by power transmission impact of the step-up transformer of the wind generating set, effectively reduce the failure rate of the wind generating set and improve the economic benefit of the wind generating set. The circuit breaker delay control circuit has the characteristics of low implementation cost, simple structure and high reliability, so that the power transmission efficiency of the wind driven generator can be improved, and the operation and maintenance cost is reduced.

Description

Circuit breaker delay control circuit for offshore wind generating set

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a circuit breaker delay control circuit for an offshore wind generating set.

Background

With the gradual development of offshore wind power plants in the offshore world, offshore wind power plants gradually develop to the open sea, so that the stability of the power supply circuit of the offshore wind turbine generator set becomes especially important.

At present, an auxiliary control system of an offshore wind generating set is powered by a special auxiliary transformer. The high-voltage side of the auxiliary transformer directly gets electricity from the low-voltage side of the booster transformer of the wind generating set, and the 690V power supply of the wind generating set is converted into a 400V power supply. The wind generating set auxiliary control system has the advantages that when the wind generating set is powered, the auxiliary control system of the wind generating set can be powered only after the step-up transformer of the wind generating set is powered.

However, the step-up transformer of the wind turbine generator system adopting such a scheme inevitably generates voltage and current impact on an auxiliary control system of the wind turbine generator system during power transmission. The impact easily causes damage to auxiliary control equipment of the wind generating set, and the damage to the equipment caused by the power transmission impact can cause over-high failure rate and over-high operation and maintenance cost of the open sea wind generating field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, provides a circuit breaker delay control circuit for an offshore wind generating set, can solve the problem of damage to auxiliary equipment of the wind generating set caused by power transmission impact of a booster transformer of the wind generating set, effectively reduces the failure rate of the wind generating set, and improves the economic benefit of the wind generating set. The circuit breaker delay control circuit has the characteristics of low implementation cost, simple structure and high reliability, so that the power transmission efficiency of the wind driven generator can be improved, and the operation and maintenance cost is reduced.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows: the utility model provides a circuit breaker delay control circuit for offshore wind generating set, includes control power supply circuit and combined floodgate delay circuit, wherein, control power supply circuit links to each other with wind generating set's step-up transformer low pressure side for supply power for combined floodgate delay circuit and circuit breaker, combined floodgate delay circuit links to each other with the circuit breaker, is used for controlling the circuit breaker delay combined floodgate.

Further, the control power supply loop is any one of a step-down transformer, an isolation transformer and a switching power supply.

Further, the closing delay circuit is a solid-state delay relay or an electromagnetic delay relay.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. by adding the closing delay loop, the auxiliary power system of the wind generating set is ensured to avoid the impact voltage and current when the booster transformer transmits power.

2. By avoiding power transmission impact, the fault rate of the wind generating set can be reduced, the availability of the wind generating set is improved, the operation and maintenance cost is reduced, and the power generation benefit is guaranteed.

Drawings

Fig. 1 is a schematic diagram illustrating an installation of a circuit breaker delay control circuit in embodiment 1.

Fig. 2 is a schematic diagram illustrating an installation of the circuit breaker delay control circuit according to embodiment 2.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Example 1

The power transmission process of the wind generating set is a process of transmitting power to the wind generating set by a power grid, namely, a step-up transformer of the wind generating set is firstly electrified and then supplies power to an auxiliary control system of the wind generating set, and the wind generating set is in grid-connected power generation after the grid-connected condition is met.

Referring to fig. 1, the circuit breaker delay control circuit for an offshore wind turbine generator system provided by the present embodiment is installed on a circuit breaker 3 between a converter 1 and a step-up transformer 2 of the wind turbine generator system, and the circuit breaker 3 is in an open state by default. In the figure, an auxiliary control system 7 is connected between the converter 1 and the circuit breaker 3 via an auxiliary transformer 6. The circuit breaker delay control circuit is composed of a control power supply circuit 4 and a switching-on delay circuit 5, wherein the control power supply circuit 4 is connected with the low-voltage side of a booster transformer 2 and used for supplying power to the switching-on delay circuit 5 and a circuit breaker 3, and the switching-on delay circuit 5 is connected with the circuit breaker 3 and used for controlling the circuit breaker 3 to switch on in a delay mode.

Preferably, the control power supply circuit 4 may be any one of a step-down transformer, an isolation transformer, and a switching power supply.

Preferably, the closing delay circuit 5 may be a solid-state delay relay or an electromagnetic delay relay.

When a boosting transformer 2 of the wind generating set is powered on, a control power supply circuit 4 reduces 690V voltage into 220V alternating-current voltage, the control circuit of a circuit breaker 3 is powered on at the moment, a closing delay circuit 5 is powered on and starts timing, and after the time reaches 1s, the closing delay circuit 5 sends a closing instruction to the circuit breaker 3, the circuit breaker 3 is closed, an auxiliary transformer 6 supplies power to an auxiliary control system 7, and the auxiliary control system 7 is powered on.

Example 2

Referring to fig. 2, unlike embodiment 1, the circuit breaker delay control circuit provided in this embodiment is installed on the circuit breaker 3 between the auxiliary transformer 6 and the auxiliary control system 7, and the converter 1 and the auxiliary transformer 6 are directly connected to the step-up transformer 2.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a circuit breaker delay control circuit for offshore wind generating set which characterized in that: the wind generating set comprises a control power supply loop and a closing delay circuit, wherein the control power supply loop is connected with the low-voltage side of a booster transformer of the wind generating set and used for supplying power to the closing delay loop and a breaker, and the closing delay circuit is connected with the breaker and used for controlling the breaker to delay closing.

2. The circuit breaker delay control circuit for an offshore wind energy generation unit of claim 1, wherein: the control power supply loop is any one of a step-down transformer, an isolation transformer and a switching power supply.

3. The circuit breaker delay control circuit for an offshore wind energy generation unit of claim 1, wherein: the closing delay circuit is a solid-state delay relay or an electromagnetic delay relay.