CN204068406U - A kind of Waste Heat Power Station direct current system - Google Patents
A kind of Waste Heat Power Station direct current system Download PDFInfo
- Publication number
- CN204068406U CN204068406U CN201420434725.7U CN201420434725U CN204068406U CN 204068406 U CN204068406 U CN 204068406U CN 201420434725 U CN201420434725 U CN 201420434725U CN 204068406 U CN204068406 U CN 204068406U
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- direct current
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- voltage
- power supply
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- 239000002918 waste heat Substances 0.000 title abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 239000013641 positive control Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a kind of Waste Heat Power Station direct current system.Described Waste Heat Power Station direct current system, comprise: for alternating current being switched to galvanic direct current circuit switched, wherein, also comprise: be connected with described direct current circuit switched, for the direct voltage in described direct current circuit switched being converted to the transducer of predetermined DC voltage, described transducer is connected with extraneous communication line.Such scheme, solve in existing residual heat system and need to design communication power supply separately, the problem of the cabinet investment of this kind of design increase dish and increase floor space, by embedding voltage transformation module in original Waste Heat Power Station direct current system, reduce the investment of dish cabinet, decrease floor space, achieve the monitoring of the parameter to communication power supply simultaneously.
Description
Technical Field
The utility model relates to a waste heat power station designs technical field, in particular to waste heat power station direct current system.
Background
At present, a 48V direct-current high-frequency switching power supply is generally adopted in China as a communication power supply for electric power, and supplies power to a 48V direct-current load. Compared with large thermal power stations and substations, the waste heat power station has a relatively simple communication system and a small load which is usually only about 10-120A.
The waste heat power station is provided with a direct current system as the thermal power station, the direct current system provides a reliable direct current power supply for control signals, relay protection, automatic devices, breaker tripping and closing operation loops and the like under normal conditions, and the direct current power supply is provided for emergency lighting, an alternating current uninterrupted power supply, an emergency lubricating oil pump and the like under the condition that the alternating current power supply disappears. The reliability of the direct current system plays an important role in the safe operation of a power plant and a substation, and the direct current system is the guarantee of the safe operation.
The DC system not only contains a storage battery, but also contains a microcomputer comprehensive monitoring device, so that the whole operation process does not need manual intervention, and the operation state, the operation parameters, the system faults and the corresponding alarm signals and telecontrol signals of the equipment are automatically detected.
At present, a waste heat power station continuously uses related standard requirements of design of a thermal power plant, a storage battery is configured according to requirements of direct current loads of a turbo generator set, and the capacity of a direct current system is determined, wherein the direct current loads do not include communication loads.
The communication load of the power access system needs to be independently designed with a direct current 48V power supply to meet the requirements of the communication power supply.
In addition, because the direct current load of the waste heat power generation communication system is small, the communication power supply is usually realized by adopting a power module power supply. The module power supply can only display the current output voltage through the LED, if other current working parameters of the module need to be further checked, a few parameters can be checked only by pressing the change-over switch, the module power supply cannot automatically run under the monitoring of a microcomputer like a power station direct current system, and the module power supply has a battery polling function and a feed switch state detection function besides a protection function.
SUMMERY OF THE UTILITY MODEL
Need independent design communication power supply in order to overcome current waste heat system, this kind relates to the investment that has increased the dish cabinet and takes up an area of to and because of when realizing communication power supply with the power module power, only can show current output voltage through LED, if need further look over the current other operating parameter of module, need through pressing change over switch, just can look over the problem of a small number of parameters, the utility model provides a waste heat power station direct current system.
In order to achieve the technical effects, the utility model adopts the following technical scheme.
A cogeneration power plant dc system comprising: a direct current switching line for switching alternating current power to direct current power, wherein, still include: and the converter is connected with the direct current switching circuit and used for converting the direct current voltage in the direct current switching circuit into preset direct current voltage, and the converter is connected with an external communication circuit.
Further, the dc switching line includes: the device comprises a positive closing bus, a positive control bus and a negative line.
Further, the dc switching line further includes: the system comprises a battery pack, a first charger, a second charger, a silicon chain, an insulation monitoring system, a first switch-on, a second switch-on, a first controller and a second controller; wherein,
the first charger and the second charger are both connected with the positive switch-on bus and the negative line;
the silicon chain is respectively connected with the positive pole closing bus and the positive pole control bus;
the battery pack is respectively connected with the positive closing bus and the positive control bus;
the insulation monitoring system is connected with the positive switching-on bus and the negative line;
the first switch-on and the second switch-on are both connected with the positive switch-on bus and the negative line;
the first controller is connected with the positive control bus and the negative line;
the second controller is connected with the positive closing bus and the negative line.
Further, the converter is connected with the positive closing bus and the negative line respectively.
Further, the exhaust heat power station direct current system still includes:
a voltage output terminal connected to the converter.
Further, the preset direct current voltage is 48 volts.
The utility model has the advantages that:
above-mentioned scheme, through embedding voltage conversion module in original waste heat power station direct current system, voltage conversion module has reduced the investment of dish cabinet through converting the high voltage into the 48V's that supplies the communication to use direct current system through using one set of integrated communication power supply, has reduced area, has realized the control to communication power supply's parameter simultaneously.
Drawings
Fig. 1 shows a schematic connection diagram of the dc system of the cogeneration power plant according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses need the independent design communication power supply among the current waste heat system, this kind relates to the investment that has increased the dish cabinet and takes up an area of to and when realizing communication power supply because of using the power module power, only can show current output voltage through LED, if need further look over the current other working parameter of module, need through pressing change over switch, just can look over the problem of a few parameters, provide a waste heat power station direct current system.
As shown in FIG. 1, the utility model discloses waste heat power station direct current system, include: a direct current switching line for switching alternating current power to direct current power, wherein, still include: and the converter is connected with the direct current switching circuit and used for converting the direct current voltage in the direct current switching circuit into preset direct current voltage, and the converter is connected with an external communication circuit.
It should be noted that the preset dc voltage is 48V that can be directly used by the communication line.
Above-mentioned embodiment is through embedding voltage converter in original direct current circuit for the mains voltage that the output communication was used, solved originally need solitary communication power and equipped with two sets of direct current system, increase the cabinet spending of twining, increase area's problem, through using one set of direct current system, reduced the investment of the cabinet of twining, reduced area.
Continuing with fig. 1, the dc switching circuit includes: positive closing bus (namely + HM), positive control bus (namely + KM) and negative pole line still include: the system comprises a battery pack, a first charger, a second charger, a silicon chain, an insulation monitoring system, a first switch-on, a second switch-on, a first controller and a second controller; wherein,
the first charger and the second charger are both connected with the positive switch-on bus and the negative line;
the silicon chain is respectively connected with the positive pole closing bus and the positive pole control bus;
the battery pack is respectively connected with the positive closing bus and the positive control bus;
the insulation monitoring system is connected with the positive switching-on bus and the negative line;
the first switch-on and the second switch-on are both connected with the positive switch-on bus and the negative line;
the first controller is connected with the positive control bus and the negative line;
the second controller is connected with the positive closing bus and the negative line.
It should be noted that the dc switching line provides a reliable dc power supply for a control signal, a relay protection, an automatic device, a circuit breaker tripping and closing operation loop and the like under a normal condition, and provides a dc power supply for emergency lighting, an ac uninterruptible power supply, an emergency lubricating oil pump and the like under an accident that an ac power supply disappears, so that whether the dc line is reliable or not plays a crucial role in the safe operation of a power plant and a power transformation plant, and is a guarantee of the safe operation.
It should be noted that the operation principle of each device in the dc switching circuit is well known to those skilled in the art, and will not be described in detail here.
Specifically, the converter is connected to the positive closing bus and the negative line, and is configured to convert a dc voltage obtained from the positive closing bus into a 48V dc voltage for use by a communication line, where the dc voltage on the positive closing bus is usually 220V, and it should be noted that, in practical applications, the voltage on the positive closing bus may have other voltage values according to practical situations in different dc systems of the cogeneration power station.
It should be noted that, in order to output the 48V dc voltage, the dc system of the cogeneration power plant further includes: a voltage output terminal connected to the converter.
It should be noted that the converter outputs a control power supply voltage of 48V which satisfies the requirements of the communication device by taking dc power from a dc bus of a dc control power supply system in the station and performing high-frequency conversion.
The working principle of the direct current system of the waste heat power station is as follows.
Two paths of three-phase alternating current power supplies are led from the alternating current screen to the direct current screen, wherein the first path of three-phase alternating current power supply and the second path of three-phase alternating current power supply are connected with a terminal row of a charging screen of a direct current system of a waste heat power station, one path of three-phase alternating current power supply is automatically selected through the two paths of alternating current automatic switching units, the three-phase alternating current power supply is led into a charger power supply module (a high-frequency switching power supply) through a charger power supply air switch, the charger power supply module is used for changing the three-phase alternating current power supply into the direct current power supply, the direct current output is 240V, the direct current is inverted into high-frequency alternating current through a full-bridge PWM (pulse width modulation) circuit, isolated and reduced voltage through a high-frequency transformer, then converted into direct current through high-frequency rectification filtering, and finally subjected to EMI filtering (the EMI filtering function is that a frequency signal when the equipment normally works is allowed to enter the equipment) and reverse connection prevention protection to output 48V direct current voltage.
The above technical scheme of the utility model, through with the communication power supply embedding waste heat power station's direct current system, not only saved investment and occupation of land, possessed waste heat power station direct current system's computer monitor function when obtaining direct current 48V communication power supply voltage, increased communication power supply's security and reliability.
The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Claims (6)
1. A cogeneration power plant dc system comprising: a direct current switching line for switching alternating current to direct current, characterized by further comprising: and the converter is connected with the direct current switching circuit and used for converting the direct current voltage in the direct current switching circuit into preset direct current voltage, and the converter is connected with an external communication circuit.
2. The cogeneration power plant dc system of claim 1 wherein said dc switching circuit comprises: the device comprises a positive closing bus, a positive control bus and a negative line.
3. The cogeneration power plant dc system of claim 2 wherein said dc switching circuit further comprises: the system comprises a battery pack, a first charger, a second charger, a silicon chain, an insulation monitoring system, a first switch-on, a second switch-on, a first controller and a second controller; wherein,
the first charger and the second charger are both connected with the positive switch-on bus and the negative line;
the silicon chain is respectively connected with the positive pole closing bus and the positive pole control bus;
the battery pack is respectively connected with the positive closing bus and the positive control bus;
the insulation monitoring system is connected with the positive switching-on bus and the negative line;
the first switch-on and the second switch-on are both connected with the positive switch-on bus and the negative line;
the first controller is connected with the positive control bus and the negative line;
the second controller is connected with the positive closing bus and the negative line.
4. The dc system of claim 2, wherein the converter is connected to the positive closing bus and the negative line, respectively.
5. The cogeneration power plant dc system of claim 4 further comprising:
a voltage output terminal connected to the converter.
6. The dc system of claim 1, wherein the predetermined dc voltage is 48 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420434725.7U CN204068406U (en) | 2014-08-01 | 2014-08-01 | A kind of Waste Heat Power Station direct current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420434725.7U CN204068406U (en) | 2014-08-01 | 2014-08-01 | A kind of Waste Heat Power Station direct current system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068406U true CN204068406U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420434725.7U Expired - Lifetime CN204068406U (en) | 2014-08-01 | 2014-08-01 | A kind of Waste Heat Power Station direct current system |
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| Country | Link |
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| CN (1) | CN204068406U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794890A (en) * | 2019-11-06 | 2020-02-14 | 国网新疆电力有限公司检修公司 | Intelligent transformer cooler control system based on comprehensive perception and working method thereof |
-
2014
- 2014-08-01 CN CN201420434725.7U patent/CN204068406U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794890A (en) * | 2019-11-06 | 2020-02-14 | 国网新疆电力有限公司检修公司 | Intelligent transformer cooler control system based on comprehensive perception and working method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Maples International Center, No. 32 Beijing 100082 Haidian District Xizhimen North Street office building B room 906 Patentee after: TOP RESOURCE CONSERVATION & ENVIRONMENT Corp. Address before: Maples International Center, No. 32 Beijing 100082 Haidian District Xizhimen North Street office building B room 906 Patentee before: TOP RESOURCE CONSERVATION ENGINEERING Co.,Ltd. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160217 Address after: Maples International Center, No. 32 Beijing 100082 Haidian District Xizhimen North Street office building B room 906 Patentee after: TOP RESOURCE CONSERVATION & ENVIRONMENT Corp. Patentee after: NINGXIA ENERGY SAVING INVESTMENT Co.,Ltd. Address before: Maples International Center, No. 32 Beijing 100082 Haidian District Xizhimen North Street office building B room 906 Patentee before: TOP RESOURCE CONSERVATION & ENVIRONMENT Corp. |
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| CX01 | Expiry of patent term |
Granted publication date: 20141231 |
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| CX01 | Expiry of patent term |