CN116216101A - Capacity expansion method for transformer substation accident oil pool - Google Patents
Capacity expansion method for transformer substation accident oil pool Download PDFInfo
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- CN116216101A CN116216101A CN202310244240.5A CN202310244240A CN116216101A CN 116216101 A CN116216101 A CN 116216101A CN 202310244240 A CN202310244240 A CN 202310244240A CN 116216101 A CN116216101 A CN 116216101A
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- Prior art keywords
- oil
- main transformer
- accident
- oil outlet
- pool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
- B65D90/44—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of inert gas for filling space above liquid or between contents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a capacity expansion method of an accident oil pool of a transformer substation, which comprises the following steps: switching the main transformer oil outlet to be communicated with the temporary oil tank; expanding the original accident oil pool during the connection of the temporary oil tank and the main transformer oil outlet, and modifying the original accident oil pool into an accident oil pool with the effective volume of more than 100% of the maximum oil amount of a single device; and connecting the main transformer oil outlet with the expanded accident oil tank after the capacity expansion transformation of the original accident oil tank is completed. The problem that an accident oil pool cannot be expanded under the condition of ensuring safety under the condition of smaller field in the prior art is solved.
Description
Technical Field
The invention relates to a capacity expansion method for an accident oil pool of a transformer substation, and belongs to the technical field of accident oil pools of transformer substations.
Background
The 2019 country has exported a new national standard of fire protection standards for thermal power plants and transformer substations (GB 50229-2019), the new standard changes the effective volume standard of an accident oil pool of the transformer substation, the effective volume of the accident oil pool of the transformer substation is required to be expanded due to the change of the national standard from 60% of the maximum oil quantity of a single device, and the capacity of the accident oil pool of the transformer substation is mainly expanded by the following two methods in the prior art:
1) Dismantling and newly building the original accident oil pool to enlarge the volume of the original accident oil pool;
2) A small accident oil pool is added beside the original accident oil pool, and the expansion is realized by connecting the original accident oil pools in series.
The problem with the method 1) is that the risk is high, because the original accident oil pool needs to be dismantled and newly constructed, the function of the original accident oil pool is stopped, but if the main transformer occurs during the dismantling and newly constructed period, the accident oil pool cannot store the main transformer oil, and the accident occurs.
The problem with method 2) is that firstly, under the condition of small site, the site space is insufficient to directly increase an accident oil pool; secondly, the small accident oil pools connected in series need to be shorter in elevation than the original accident oil pools to form pressure difference so that oil flows into the small accident oil pools. The above two conditional restrictions render the solution unfeasible.
Therefore, there is an urgent need for a method of expanding an accident oil pool under the condition of ensuring safety in a small site.
Disclosure of Invention
The invention aims to solve the technical problems that: the capacity expansion method for the transformer substation accident oil pool is provided to overcome the defects of the prior art.
The technical scheme of the invention is as follows: a method of expanding an accident oil pool of a substation, the method comprising:
switching the main transformer oil outlet to be communicated with the temporary oil tank;
expanding the original accident oil pool during the connection of the temporary oil tank and the main transformer oil outlet, and modifying the original accident oil pool into an accident oil pool with the effective volume of more than 100% of the maximum oil amount of a single device;
and connecting the main transformer oil outlet with the expanded accident oil tank after the capacity expansion transformation of the original accident oil tank is completed.
Before the main transformer oil outlet is switched to be communicated with the temporary oil tank, inert gas or nitrogen is filled into the temporary oil tank, so that air in the temporary oil tank is replaced by the inert gas or the nitrogen.
Further, the temporary oil tank comprises a controller, a tank body, a flowmeter and an air pump;
the tank body is a sealed tank body, the effective volume of the tank body is more than 100% of the maximum oil quantity of a single device, the tank body is communicated with the main transformer oil outlet, the flowmeter is arranged on the main transformer oil outlet, and the air pump is communicated with the upper part of the tank body.
Further, the device also comprises a collecting container, wherein the collecting container is communicated with the tank body through an air extracting pump.
Further, the device also comprises a solenoid valve, wherein the solenoid valve is arranged between the collecting container and the air extracting pump, and the solenoid valve is electrically connected with the controller.
Further, the method for controlling the air pump and the electromagnetic valve by the controller comprises the following steps:
monitoring the oil outlet flow of the main transformer oil outlet through a flowmeter, and controlling the electromagnetic valve to be opened and controlling the air pump to pump air if the accumulated oil outlet flow of the main transformer oil outlet is smaller than a first set accumulation threshold value and the oil outlet flow is larger than a first set flow rate threshold value; when the flow meter monitors that the accumulated oil outlet quantity of the main transformer oil outlet is larger than a second set accumulation threshold value and the oil outlet flow quantity is larger than a second set flow speed threshold value, the electromagnetic valve is controlled to be closed, and the air pump is controlled to stop air extraction.
Specifically, the calculation method of the accumulated oil output of the main transformer oil outlet comprises the following steps:
q is accumulated oil quantity of the main transformer oil outlet, S is cross-sectional area of the main transformer oil outlet, and t is accumulated monitoring time of the flowmeter.
The beneficial effects of the invention are as follows: in contrast to the prior art, the method has the advantages that,
1) According to the invention, during the capacity expansion of the accident oil tank, the temporary oil tank is used for replacing the original accident oil tank, and after the capacity expansion transformation of the accident oil tank is completed, the main transformer oil outlet is connected with the expanded accident oil tank, so that the safety is ensured, even if an accident occurs in the process of expanding the original accident oil tank, the temporary oil tank plays the original role of the accident oil tank, the space is not occupied, and after the capacity expansion of the main transformer is completed, the temporary oil tank can be removed and replaced into the expanded accident oil tank;
2) According to the invention, inert gas is utilized to ensure that the oil of the main transformer cannot contact with oxygen after entering the temporary oil tank, so that the probability of deflagration accidents is reduced;
3) According to the invention, whether the main transformer produces oil or not is monitored through the flowmeter, if the oil is produced, the inert gas in the tank body is pumped by the air pump, so that negative pressure is generated in the tank body, and the oil in the main transformer is pumped, thereby solving the problems of low hydraulic pressure and unsmooth oil production of the main transformer caused by almost different heights of the main transformer and the tank body;
4) According to the invention, through the collecting container, the inert gas extracted from the tank body by the air extracting pump can be collected for recycling, so that the use cost is reduced;
5) According to the invention, the gas collection container can be closed through the electromagnetic valve, so that inert gas or nitrogen in the gas collection container can not leak when the air pump does not work;
6) According to the invention, the oil flow accumulated by the oil outlet of the main transformer is used for judging the starting and stopping of the electromagnetic valve and the air pump, so that the problem that physical devices such as a liquid level meter are easy to damage is avoided, and the problem of misjudgment caused by accumulated errors of the flowmeter can be avoided by combining the flow speed threshold value as a judging condition.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention;
fig. 2 is a block diagram of a circuit connection of the present invention.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Implementation example 1:
referring to fig. 1 and 2, in order to expand an accident oil pool under the condition that a site is small and the condition that safety is ensured, a method including the steps of:
and switching the oil outlet of the main transformer 1 to be connected with the temporary oil tank. This may be by manual switching.
And during the connection of the temporary oil tank and the oil outlet of the main transformer 1, the original accident oil pool is subjected to capacity expansion transformation, and the original accident oil pool is transformed into an accident oil pool with the effective volume of more than 100% of the maximum oil quantity of a single device. This can be achieved by adding a temporary tank of greater capacity around the crude oil pool and the effective volume of the temporary tank is increased to over 100% of the maximum oil volume of the individual plant.
After the capacity expansion transformation of the original accident oil pool is completed, the oil outlet of the main transformer 1 is connected to the expanded accident oil pool. This may be achieved by means of manual switching, etc.
To ensure operational safety, we also need to take the following steps during operation:
before the oil outlet of the main transformer 1 is switched to be connected with the temporary oil tank, inert gas or nitrogen is filled into the temporary oil tank. This can be achieved by connecting the collection container 6 and the suction pump 4, whereby the air in the temporary tank is replaced by inert gas or nitrogen, reducing the risk of explosion.
The temporary oil tank comprises a controller, a tank body 2, a flowmeter 3 and an air pump 4. The tank body 2 is a sealed tank body 2 and has an effective volume of more than 100%, and the flowmeter 3 is arranged on the oil outlet of the main transformer 1. The air pump 4 is communicated with the upper part of the tank body 2, and the air pressure in the tank body 2 can be controlled by the controller to control the air pump 4.
A solenoid valve 5 may be provided between the collection container 6 and the suction pump 4 for controlling the opening and closing of the collection container 6. The controller can control the operation of the electromagnetic valve 5 and the air pump 4 by monitoring the oil outlet flow of the oil outlet of the main transformer 1. For example, when the oil discharge flow rate is greater than the first set flow rate threshold value and the accumulated oil discharge amount is less than the first set accumulation threshold value, the controller may open the solenoid valve 5 and control the suction pump 4 to suction air. When the oil discharge flow rate is greater than the second set flow rate threshold value and the accumulated oil discharge amount is greater than the second set accumulation threshold value, the controller may close the solenoid valve 5 and stop the operation of the suction pump 4.
Specifically, the calculation method of the accumulated oil output of the main transformer 1 oil outlet comprises the following steps:
wherein Q is the accumulated oil output quantity of the oil outlets of the main transformer 1, S is the cross-sectional area of the oil outlets of the main transformer 1, and t is the accumulated monitoring time of the flowmeter 3.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (7)
1. A method for expanding an accident oil pool of a transformer substation, the method comprising:
switching an oil outlet of the main transformer (1) to be communicated with a temporary oil tank;
expanding the volume of an original accident oil pool during the connection of the temporary oil tank and the oil outlet of the main transformer (1), and modifying the original accident oil pool into an accident oil pool with the effective volume of more than 100% of the maximum oil quantity of a single device;
and connecting the oil outlet of the main transformer (1) with the expanded accident oil pool after the expansion transformation of the original accident oil pool is completed.
2. The capacity expansion method of the transformer substation accident oil pool according to claim 1, wherein before the oil outlet of the main transformer (1) is switched to be communicated with the temporary oil tank, inert gas or nitrogen is filled into the temporary oil tank, so that air in the temporary oil tank is replaced by the inert gas or nitrogen.
3. The method for expanding the capacity of the accident oil pool of the transformer substation according to claim 2, wherein the temporary oil tank comprises a controller, a tank body (2), a flowmeter (3) and an air pump (4);
the tank body (2) is a sealed tank body (2), the effective volume of the tank body (2) is more than 100% of the maximum oil quantity of a single device, the tank body (2) is communicated with the oil outlet of the main transformer (1), the flowmeter (3) is arranged on the oil outlet of the main transformer (1), and the air pump (4) is communicated with the upper portion of the tank body (2).
4. A method of expanding a transformer substation event oil pool according to claim 3, further comprising a collection container (6), the collection container (6) being in communication with the tank (2) via an aspiration pump (4).
5. The transformer substation accident oil pool expansion method according to claim 4, further comprising a solenoid valve (5), wherein the solenoid valve (5) is disposed between the collection container (6) and the suction pump (4), and the solenoid valve (5) is electrically connected to the controller.
6. The capacity expansion method of the transformer substation accident oil pool according to claim 5, wherein the method of controlling the air pump (4) and the electromagnetic valve (5) by the controller is as follows:
monitoring the oil outlet flow of the oil outlet of the main transformer (1) through a flowmeter (3), and controlling the electromagnetic valve (5) to be opened and controlling the air pump (4) to pump air if the accumulated oil outlet flow of the oil outlet of the main transformer (1) is smaller than a first set accumulation threshold value and the oil outlet flow is larger than a first set flow speed threshold value; when the flow meter (3) monitors that the accumulated oil outlet quantity of the oil outlet of the main transformer (1) is larger than a second set accumulation threshold value and the oil outlet flow quantity is larger than a second set flow speed threshold value, the electromagnetic valve (5) is controlled to be closed, and the air suction pump (4) is controlled to stop air suction.
7. The capacity expansion method of the transformer substation accident oil pool according to claim 6, wherein the calculation method of the accumulated oil quantity of the oil outlet of the main transformer (1) is as follows:
q is accumulated oil quantity of oil outlets of the main transformer (1), S is cross-sectional area of the oil outlets of the main transformer (1), and t is accumulated monitoring time of the flowmeter (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310244240.5A CN116216101A (en) | 2023-03-14 | 2023-03-14 | Capacity expansion method for transformer substation accident oil pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310244240.5A CN116216101A (en) | 2023-03-14 | 2023-03-14 | Capacity expansion method for transformer substation accident oil pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116216101A true CN116216101A (en) | 2023-06-06 |
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ID=86569380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310244240.5A Pending CN116216101A (en) | 2023-03-14 | 2023-03-14 | Capacity expansion method for transformer substation accident oil pool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116216101A (en) |
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2023
- 2023-03-14 CN CN202310244240.5A patent/CN116216101A/en active Pending
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