CN214755549U

CN214755549U - Novel black start gas turbine starting system

Info

Publication number: CN214755549U
Application number: CN202120576685.XU
Authority: CN
Inventors: 王晓田; 刘涛; 庄桂啟; 夏京民; 沈明亮; 赵信; 杨胜华; 吴海峰; 程际宇; 赵永平
Original assignee: SEPCO3 Electric Power Construction Co Ltd
Current assignee: SEPCO3 Electric Power Construction Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-11-16
Anticipated expiration: 2031-03-22

Abstract

The utility model discloses a novel black start gas turbine starting system, its characteristic includes, the firewood generator set has connected gradually BDA section generating line, BCA section generating line and BBA section generating line, BBA section generating line and combustion engine group link, the combustion engine set is connected through exit switch GCB, high factory change, main change and booster station. The method has the advantages that the Load Bank is not used any more, the running bus is adopted to carry out the basic Load test in a grid-connected mode, the Load Bank renting cost is saved, the Load Bank dismounting time is greatly saved, and the black-start generator body debugging time is greatly reduced.

Description

Novel black start gas turbine starting system

Technical Field

The application belongs to the field of circuit control, and particularly relates to a novel black-start gas turbine starting system.

Background

The black start refers to a process of driving a unit without self-starting capability by starting a unit with self-starting capability in a system without depending on the help of other systems after the whole power system is powered off due to a fault or in a large area, gradually expanding the range of recovering power supply, and finally recovering power supply of the whole system. The black start system is an important guarantee for the safe operation of the unit, and the debugging of the black start generator is a key for checking whether the black start system can normally operate. Normally, the black-start generator body debugging and the combustion engine starting test are respectively carried out, a Load Bank is required, the cost is high, the installation procedure is complex, and the popularization is not facilitated.

SUMMERY OF THE UTILITY MODEL

Firstly, a Load Bank is not used, but a running bus is adopted to carry out a basic Load test in a grid-connected mode, so that the expense of renting the Load Bank is saved, the assembly and disassembly time of the Load Bank is greatly saved, and the debugging time of the black-start generator body is greatly reduced. Secondly, the black-start generator body debugging which is originally required to be carried out independently one by one is centralized to be grouped debugging, and the debugging efficiency is greatly improved. The technical proposal is that the method comprises the following steps,

the utility model provides a novel black start gas turbine starting system, the firewood generate unit connects gradually BDA section generating line, BCA section generating line and BBA section generating line, BBA section generating line is organized with the combustion engine and is connected, burn the unit through exit switch GCB, high factory change, main change with step up the station and be connected.

Further, BDA section generating line one end is connected with BCA section generating line through the bus tie switch, and the other end passes through vacuum circuit breaker and is connected with the firewood generator group, the firewood generator group passes through neutral point isolator and resistance connection, resistance ground connection.

Furthermore, the BDA section bus is connected with the BMA section bus through a transformer, a high-voltage side switch is arranged between the BDA section bus and the transformer, and a low-voltage side switch is arranged between the transformer and the BMA section bus.

Furthermore, an incoming line switch is arranged between the BDA section bus and the BCA section bus.

Further, the generator outlet circuit breaker system is switched on when the gas turbine set reaches the set rotating speed.

And the diesel generator set, the BDA section bus, the BCA section bus and the BBA section bus are respectively connected with a controller.

Advantageous effects

Firstly, a Load Bank is not used any more, but a running bus is adopted to carry out a basic Load test in a grid-connected mode, so that the expense of renting the Load Bank is saved, the time for dismounting the Load Bank is greatly saved, and the time for debugging the black-start generator body is greatly reduced. Secondly, the black-start generator body debugging which is originally required to be carried out independently one by one is centralized to be grouped debugging, and the debugging efficiency is greatly improved. The technical proposal is that the method comprises the following steps,

drawings

FIG. 1 is a flow chart of the present application;

FIG. 2 is a connection diagram of the present application;

FIG. 3 is a schematic diagram of a controller configuration;

the system comprises a 1-BDA section bus, a 2-BCA section bus, a 3-BBA section bus, a 4-BMA section bus, a 5-transformer, a 6-diesel generator set, a 7-bus interconnection switch, an 8-high-voltage side switch, a 9-vacuum circuit breaker, a 10-neutral point isolation disconnecting link, an 11-resistor, a 12-low-voltage side switch, a 13-bus interconnection switch and a 14-incoming line switch.

Detailed Description

The following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

The utility model provides a novel black start gas turbine system, two sets of firewood generator sets 6 are equipped with one set of reserve (G10 and G20) respectively the firewood generator set 6 connects gradually BDA section generating line 1, BCA section generating line 2 and BBA section generating line 3, BBA section generating line 3 and combustion engine group link, it is connected with the booster station to fire the unit, the booster station is connected with BBA section generating line 3, is equipped with switch (like 21BBA switch) on BBA section generating line 3. One end of the BDA section bus 1 is connected with the BCA section bus 2 through a bus tie switch 7, the other end of the BDA section bus is connected with the diesel generator set 6 through a vacuum circuit breaker 9, the diesel generator set 6 is connected with a resistor 11 through a neutral point isolating switch 10, and the resistor 11 is grounded.

The BDA section bus 1 is connected with the BMA section bus 4 through a transformer 5, a high-voltage side switch 8 is arranged between the BDA section bus 1 and the transformer 5, and a low-voltage side switch 12 is arranged between the transformer 5 and the BMA section bus 4. And an incoming line switch 14 is arranged between the BDA section bus 1 and the BCA section bus 2.

As shown in fig. 2, 00/01/02BDA section buses are black-start generators 13.8KV outlet buses respectively;

01/02BCA section bus is a 13.8KV bus of the power plant public system;

11/21/41/61/12/31/51 BBA: the power supply switch of the bus, such as a 21BBA switch, is provided with power from a GT21 combustion engine, and other power supplies are provided from other different combustion engines.

A first set of firewood generator sets G11-G16 and a spare set G10; a second set of firewood-making units G21-G26 and a spare G20.

The incoming line switch and the bus coupler switch of 400V bus 00BMA and 00BMB buses: the left side and the right side are provided with an incoming line switch 14, the middle part is provided with a bus coupler switch 13, when the incoming line switch 14 trips or an upper side transformer 6 of the 14 switches is overhauled, 00BMA is powered off, and at the moment, the bus coupler switch 13 is automatically switched on to supply power to the power-off bus 00 BMA.

LOAD above 400V bus 00BMA and 00 BMB: it means the load of generating line, for example lubricating-oil pump, air compressor machine, factory building fresh air unit, firewood send out local control cabinet etc..

And when the gas turbine set reaches the set rotating speed (3600 revolutions), a generator outlet circuit breaker system (GCB) is switched on and switched off.

The diesel generator set 6, the BDA section bus 1, the BCA section bus 2 and the BBA section bus 3 are respectively connected with a controller (a single chip microcomputer or a PLC).

FIG. 3 shows the PLC system configured with the buscouple switch on the BCA bus in the off position. In this case, the black start generator set is divided into two power generation systems, with 2 backup generators added to each 6 generators. In this case, the system can be tested in two steps:

step 1: 6 generators provide power to the bus bar 01BCA section;

step 2: 6 generators provide power to the bus bar 02BCA section.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a novel black start gas turbine starting system, its characteristic includes, the firewood generate electricity unit connects gradually BDA section generating line, BCA section generating line and BBA section generating line, BBA section generating line and combustion engine group link, the combustion engine unit becomes through exit switch GCB, high factory, the main change becomes and step up the station connection.

2. The novel black start gas turbine starting system as claimed in claim 1, wherein the BDA segment bus bar is connected to the BCA segment bus bar at one end through a bus bar interconnection switch, and is connected to the diesel generator set at the other end through a vacuum circuit breaker, the diesel generator set is connected to a resistor through a neutral point isolation switch, and the resistor is grounded.

3. The novel black start gas turbine starting system as claimed in claim 1, wherein the BDA segment bus bar is connected with the BMA segment bus bar through a transformer, a high-voltage side switch is arranged between the BDA segment bus bar and the transformer, and a low-voltage side switch is arranged between the transformer and the BMA segment bus bar.

4. The novel black start gas turbine starting system as set forth in claim 3, wherein a service switch is provided between said BDA segment bus and said BCA segment bus.

5. The system of claim 1, wherein the gas turbine engine assembly is configured to close a generator outlet breaker system when a set rotational speed is reached.

6. The novel black start gas turbine starting system as set forth in claim 1, wherein the diesel generator set, BDA segment bus, BCA segment bus and BBA segment bus are connected to a controller, respectively.