CN112910339B - Black-start manual excitation tape line generator voltage control value acquisition device and method - Google Patents
Black-start manual excitation tape line generator voltage control value acquisition device and method Download PDFInfo
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- CN112910339B CN112910339B CN202011316586.4A CN202011316586A CN112910339B CN 112910339 B CN112910339 B CN 112910339B CN 202011316586 A CN202011316586 A CN 202011316586A CN 112910339 B CN112910339 B CN 112910339B
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- 239000013078 crystal Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 8
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- 230000005540 biological transmission Effects 0.000 claims description 4
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- 230000005611 electricity Effects 0.000 claims 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/02—Details of the control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to a voltage control value acquisition device of a generator with a line under black start manual excitation, which comprises a battery module, a singlechip module and a control display screen; the single chip microcomputer module of the device obtains main transformer reactance, generator synchronous reactance and line reactance parameters read by a fault recorder and controls the input of a display screen, the single chip microcomputer module calculates the voltage rise multiple of an air-drop line generator in a manual excitation mode during black start, the calculation result of the voltage rise multiple is displayed by controlling the display screen, the maximum operation value of the voltage at the generator end during black start when the line is not switched is determined by reading the calculation result of the voltage rise multiple, and the voltage of electrical equipment does not exceed a rated value after the line is switched; the voltage rise multiple of the generator of the air-drop line under a manual mode is accurately calculated, necessary guiding significance is provided for voltage control of the black starter terminal, and meanwhile safety of primary equipment can be guaranteed.
Description
Technical Field
The invention belongs to the technical field of black start, and particularly relates to a voltage control value acquisition device and method for a generator with a line under black start manual excitation.
Background
The black start is that after the power grid has extreme faults and the power grid loses power, the power plant with the self-starting capability is used for leading power supply, and the power supply range is gradually enlarged in a 'spark ignition' mode until the normal operation of the whole power grid is recovered. The black start is used as a power grid security guard of each country, the power failure loss caused by major natural disasters can be reduced, and the black start example shows that the black start has great significance to the power grid and national security at home and abroad. In order to ensure safe and stable operation of a power grid and standardize operation and management of black start equipment, the power grid successively issues a plurality of relevant regulations and regulations of black start according to relevant national laws and regulations and industrial standards, economic compensation is provided for a power plant with black start capacity, the power plant with the condition has high attention, and the black start capacity construction and test work can be actively carried out by matching with the power grid.
When the existing power system is in black start, when a transmission line is in no-load, and excitation is under a manual control mode, the voltage at the generator terminal of a black start unit is spontaneously increased, if the voltage increase multiple is not clear in advance, when the black start unit is suddenly put into a no-load line, the electric voltage in a black start range exceeds a rated range, and equipment can be damaged in serious cases. At present, the voltage increase multiple of the generator is not calculated from the angle of actual line parameters, and an acquisition device for the voltage control value of the generator with the line in a black-start manual excitation mode is not available.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a voltage control value acquisition device of a generator with a line under black start manual excitation, which is characterized in that line impedance parameters are sent out through actual measurement of a fault recorder and input into a calculation device, the voltage increase multiple of the generator of the air-drop line under a manual mode is accurately calculated, necessary guiding significance is provided for voltage control of the black start machine terminal, and meanwhile, the safety of primary equipment can be ensured.
The invention is realized by the following technical scheme:
the voltage control value acquisition device of the generator with the line under the condition of black start manual excitation comprises a battery module, a single chip microcomputer module and a control display screen, wherein the output voltage end of the battery module is connected with the power ends of the single chip microcomputer module and the control display screen, the battery module is used for supplying power for the single chip microcomputer module and the control display screen, the communication end of the single chip microcomputer module is connected with the communication end of the control display screen, the control display screen is used for inputting parameters of a power transmission line, a generator and a main transformer which are required by black start voltage rising and transmitting the parameters to the single chip microcomputer module, and the single chip microcomputer module transmits voltage rising result information to the control display screen for display after processing and calculation;
The single chip microcomputer module obtains the voltage rise multiple of the generator with the line in a manual excitation mode according to the input actual reactance of the generator, the actual reactance of the main transformer and the actual line impedance read from fault recording by the following formula to obtain a voltage control value of the generator;
wherein, EqThe generator no-load voltage when the generator internal potential is not connected with the line, XtIs a main transformer reactance, XdFor synchronous reactance of the generator, XcLine reactance, U 'read from fault recorder'gThe voltage of the generator terminal is obtained after the circuit is put into use in a manual excitation mode.
Preferably, the single chip microcomputer module adopts an MSP430F149 type 16-bit single chip microcomputer, the first crystal oscillator frequency is 8MHz, 64 pins are arranged, and the RAM capacity of the memory is 2 KB.
Further, the single chip microcomputer module further comprises a second crystal oscillator, and the frequency is 32.768 kHz.
Preferably, the analog ground and the digital ground in the single chip microcomputer module are connected through a 0 omega resistor.
Preferably, the battery module adopts a charger with 3.3V voltage output.
Preferably, the control display screen is used for inputting a main transformer reactance, a generator synchronous reactance and a line reactance read by fault recording and transmitting the line reactance to the single chip microcomputer module, and the single chip microcomputer module is used for calculating the voltage rise multiple of the generator and transmitting the voltage rise multiple back to the control display screen for display.
Preferably, the size of the control display screen is 7 inches, the flash capacity is 64M, the RAM capacity of the memory is 512K, and the clock frequency is 200 Mhz.
The method for acquiring the voltage control value of the generator with the line under the condition of black start manual excitation comprises the following steps:
1) inputting reactance parameters of an Xt main transformer on a control display screen;
2) inputting Xd generator synchronous reactance parameters on a control display screen;
3) inputting reactance parameters of the Xc line read from the fault recorder on a control display screen;
4) the single chip microcomputer module is based on
Calculating a voltage rise multiple, and displaying the calculated voltage rise multiple of the generator through a control display screen;
5) and obtaining the maximum operation value of the voltage of the generator end when the generator is not switched on during black start as the voltage control value of the black start generator according to the voltage increasing multiple of the generator.
Compared with the prior art, the invention has the following beneficial technical effects:
the single chip microcomputer module obtains main transformer reactance, generator synchronous reactance and line reactance parameters read by a fault recorder and controls the input of a display screen, the single chip microcomputer module calculates the voltage rise multiple of an air-drop line generator in a manual excitation mode during black start, the calculation result of the voltage rise multiple is displayed by controlling the display screen, the maximum operation value of the voltage at the generator end during black start when the line is not switched is determined by reading the calculation result of the voltage rise multiple, the voltage of electrical equipment does not exceed a rated value after the line is switched, and the safe operation of the black start is ensured. The intelligent control system is convenient to use, is very beneficial to field use, solves the practical technical problem existing in the field, and can be popularized and used in the field of black start or route casting.
Furthermore, the voltage rise multiple of the generator is calculated through the line reactance parameters read by the fault recorder, and the actually read line reactance parameters reflect the voltage rise multiple more accurately than the line design values through practical black start inspection, so that the method has guiding significance on actual black start.
Furthermore, the invention adopts the low-power-consumption singlechip module, thereby prolonging the live working time of the device and being more environment-friendly.
Furthermore, the battery module adopts the rechargeable power bank which can be repeatedly charged, so that the cost of replacing the battery by the device is reduced.
Furthermore, the control display screen is an integrated HMI touch screen, the interface is friendly, the traditional key module is replaced by touching input parameters, and the complexity of the circuit is simplified.
Furthermore, the singlechip module is connected with the analog ground and the digital ground through a 0 omega resistor, so that the interference between the analog ground and the digital ground is reduced.
Drawings
FIG. 1 is a schematic block diagram of the apparatus of the present invention.
Fig. 2 is a schematic diagram of the circuit of the present invention.
In the figure: a battery module 1; the singlechip module 2; controls the display screen 3.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention can solve the problem of calculation of voltage rise times of the airdrop line in a black start manual excitation mode, avoids the problem of low reliability of the calculation of traditional theoretical parameters, utilizes the calculation of actual line parameters, has more practical results, can play a guiding role in actual black start, and provides the generator voltage control value acquisition device which can be used for field use.
The invention relates to a voltage control value acquisition device of a generator with a line under black start manual excitation, which is shown in figure 1 and comprises a battery module 1, a singlechip module 2 and a control display screen 3, wherein the output voltage end of the battery module 1 is connected with the power ends of the singlechip module 2 and the control display screen 3, the battery module 1 is used for supplying power to the singlechip module 2 and the control display screen 3, the communication end of the singlechip module 2 is connected with the communication end of the control display screen 3, the control display screen 3 is used for inputting parameters of a power transmission line, a generator and a main transformer which are required by black start voltage rising and transmitting the parameters to the singlechip module 2, and the singlechip module 2 transmits voltage rising result information to the control display screen 3 for display after processing and calculation.
In this embodiment, the single chip microcomputer module 2 adopts an MSP430F149 type 16-bit single chip microcomputer, the first crystal oscillator has a frequency of 8MHz and 64 pins, and the RAM capacity of the memory is 2 KB; and the single chip microcomputer module 2 respectively utilizes the actual line impedance read from the fault recording and calculates the voltage rise multiple of the generator with the line in the manual excitation mode according to the actual reactance of the generator and the actual reactance of the main transformer.
In this embodiment, the single chip module 2 further includes a second crystal oscillator with a frequency of 32.768 kHz.
In this embodiment, the analog ground and the digital ground in the single chip module 2 are connected through a 0 Ω resistor.
In this embodiment, the single chip module 2 obtains the generator voltage rise multiple in the line with the manual excitation mode according to the input actual reactance of the generator and the actual reactance of the main transformer and the actual line impedance read from the fault recording by the following formula to obtain a generator voltage control value;
wherein, EqFor the generator no-load voltage, X, when the potential in the generator is also not on-linetIs a main transformer reactance, XdFor generator synchronous reactance, XcLine reactance, U 'read from fault recorder'gThe generator terminal voltage is put into the circuit in a manual excitation mode.
In this embodiment, the battery module 1 adopts a charger with 3.3V voltage output.
In this embodiment, the size of the control display screen 3 is 7 inches, the flash capacity is 64M, the RAM capacity of the memory is 512K, and the clock frequency is 200 Mhz; the control display screen 3 is used for inputting a main transformer reactance, a generator synchronous reactance and a line reactance read by fault recording and transmitting the line reactance to the single chip microcomputer module 2, and the single chip microcomputer module 2 calculates the voltage rise multiple of the generator and transmits the voltage rise multiple back to the control display screen 3 for display.
In this embodiment, as shown in fig. 2, the battery module 1 includes a BT1 charger and a power interface P1, the positive electrode of the BT1 charger is connected to the 1 st pin of the power interface P1, and the negative electrode of the BT1 charger is connected to the 2 nd pin of the power interface P1; the single chip microcomputer module 2 comprises a single chip microcomputer U1, a resistor R1, a capacitor C1, a capacitor C2, a first crystal oscillator Y1 and a second crystal oscillator Y2, wherein a 1 st pin and a 64 th pin of the single chip microcomputer U1 are connected with a 1 st pin of a power interface P1, a 63 th pin of the single chip microcomputer U1 is connected with a 2 nd pin of the power interface P1, a 62 th pin of the single chip microcomputer U1 is connected with a 2 nd pin of the power interface P1 through a resistor R1, two ends of the second crystal oscillator Y2 are respectively connected in parallel with an 8 th pin and a 9 th pin of the single chip microcomputer U1, two ends of the capacitor C1 and the capacitor C2 are respectively connected in parallel with two ends of the first crystal oscillator Y1 after being connected in series, two ends of the first crystal oscillator Y1 are respectively connected in parallel with a 52 th pin and a 53 th pin of the single chip microcomputer U1, and a common point connected with the capacitor C1 and the capacitor C2 is connected with a 2 nd pin of the power interface P1; the control display screen 3 is a display screen D1, a 1 st pin and a 2 nd pin of a display screen D1 are respectively connected with a 1 st pin and a 2 nd pin of a power interface P1, a 3 rd pin and a 4 th pin of the display screen D1 are respectively connected with a 35 th pin and a 34 th pin of a single chip microcomputer U1, a 3 rd pin and a 4 th pin of the display screen D1 and the 35 th pin and the 34 th pin of the single chip microcomputer U1 are serial communication ports, and the single chip microcomputer module 2 and the control display screen 3 carry out data communication through the ports.
The method for acquiring the voltage control value of the generator with the line under the condition of black start manual excitation is characterized by comprising the following steps of:
1) inputting the reactance parameter of the Xt main transformer on a control display screen 3, and entering the step 2);
2) inputting Xd generator synchronous reactance parameters on a control display screen 3, and entering step 3);
3) inputting the reactance parameters of the Xc line read from the fault recorder into the control display screen 3, and entering the step 4);
4) clicking a button for starting calculation on a control display screen 3, and the singlechip module 2 according to the result
Calculating the voltage rise multiple, displaying the calculated voltage rise multiple of the generator by controlling a display screen 3, and entering the step 5);
5) and obtaining the maximum operation value of the generator end voltage when the circuit is not switched during black start as the voltage control value of the black start generator according to the voltage increasing multiple of the generator.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The voltage control value acquisition device of the generator with the line under the condition of black start manual excitation is characterized by comprising a battery module (1), a single chip microcomputer module (2) and a control display screen (3), wherein the output voltage end of the battery module (1) is connected with the power ends of the single chip microcomputer module (2) and the control display screen (3), the battery module (1) is used for supplying power to the single chip microcomputer module (2) and the control display screen (3), the communication end of the single chip microcomputer module (2) is connected with the communication end of the control display screen (3), the control display screen (3) is used for inputting parameters of a power transmission line, a generator and a main transformer required by black start voltage rising and transmitting the parameters to the single chip microcomputer module (2), and the single chip microcomputer module (2) transmits voltage rising result information to the control display screen (3) for display after processing and calculation;
The single chip microcomputer module (2) obtains the voltage rise multiple of the generator with the line in a manual excitation mode according to the input actual reactance of the generator, the actual reactance of the main transformer and the actual line impedance read from the fault recorder, and obtains a voltage control value of the generator;
wherein, EqThe generator is in no-load electricity when the internal potential of the generator is not on linePressure, XtIs a main transformer reactance, XdFor generator synchronous reactance, XcLine reactance, U 'read from fault recorder'gThe voltage of the generator terminal is obtained after the circuit is put into use in a manual excitation mode.
2. The black-start manually-excited voltage control value acquisition device for the generator with the line under the excitation according to claim 1, wherein the single chip microcomputer module (2) adopts an MSP430F149 type 16-bit single chip microcomputer, the first crystal oscillator frequency is 8MHz, 64 pins are provided, and the RAM capacity of the memory is 2 KB.
3. The black-start manual excitation lower-band line generator voltage control value acquisition device according to claim 2, wherein the single chip microcomputer module (2) further comprises a second crystal oscillator with a frequency of 32.768 kHz.
4. The black-start manual excitation generator voltage control value acquisition device under the condition of claim 2, wherein the analog ground and the digital ground in the single chip microcomputer module (2) are connected through a 0 Ω resistor.
5. The black-start manual excitation lower belt line generator voltage control value acquisition device according to claim 1, wherein the battery module (1) adopts a charger with 3.3V voltage output.
6. The black-start voltage control value acquisition device for the generator with the line under the manual excitation according to claim 1, wherein the control display screen (3) is used for inputting the reactance of the main transformer, the synchronous reactance of the generator and the line reactance read by the fault recorder, transmitting the input values to the singlechip module (2), calculating the voltage rise multiple of the generator through the singlechip module (2), and transmitting the voltage rise multiple back to the control display screen (3) for display.
7. The black-start manual excitation down-band line generator voltage control value acquisition device according to claim 1 or 6, wherein the control display screen (3) has a size of 7 inches, a flash capacity of 64M, a memory RAM capacity of 512K, and a clock frequency of 200 MHz.
8. The method for acquiring the voltage control value of the generator with the line under the condition of black start manual excitation is characterized by comprising the following steps of:
1) inputting X on the control display screen (3)tA main transformer reactance parameter;
2) inputting X on the control display screen (3)dA generator synchronous reactance parameter;
3) Inputting X read from the fault recorder on the control display screen (3)cA line reactance parameter;
4) the singlechip module (2) is based on
Calculating the voltage rise multiple, and displaying the calculated voltage rise multiple of the generator through a control display screen (3); wherein E isqIs the generator no-load voltage U 'when the internal potential of the generator is not switched on'gThe voltage at the generator terminal is obtained after the circuit is put into operation in a manual excitation mode;
5) and obtaining the maximum operation value of the voltage of the generator end when the generator is not switched on during black start as the voltage control value of the black start generator according to the voltage increasing multiple of the generator.
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| CN104579062A (en) * | 2014-12-08 | 2015-04-29 | 武汉科创源科技有限公司 | Low-voltage generator black start excitation device |
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| JP2008301584A (en) * | 2007-05-30 | 2008-12-11 | Hitachi Ltd | Wind turbine generator system and control method for power converter |
| CN101236575B (en) * | 2008-01-30 | 2010-12-01 | 山东大学 | Black start assistant decision making support/training system and its method |
| CN103036227B (en) * | 2012-11-29 | 2016-04-20 | 三峡大学 | A kind of provincial power network black starting-up and large area blackout processing method |
| DE102013102603B4 (en) * | 2013-03-14 | 2017-02-09 | Sma Solar Technology Ag | Method for a black start of a power plant with multiple inverters connectable to an AC grid |
| US10340695B2 (en) * | 2017-02-27 | 2019-07-02 | General Electric Company | Battery energy storage design with black starting capability |
| CN109884439B (en) * | 2019-04-04 | 2024-02-23 | 西安热工研究院有限公司 | Black-start test system and method for power system |
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| CN104579062A (en) * | 2014-12-08 | 2015-04-29 | 武汉科创源科技有限公司 | Low-voltage generator black start excitation device |
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