CN215817557U - Primary frequency modulation system of thermal power generating unit based on new energy power generation equipment - Google Patents
Primary frequency modulation system of thermal power generating unit based on new energy power generation equipment Download PDFInfo
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- CN215817557U CN215817557U CN202121437768.7U CN202121437768U CN215817557U CN 215817557 U CN215817557 U CN 215817557U CN 202121437768 U CN202121437768 U CN 202121437768U CN 215817557 U CN215817557 U CN 215817557U
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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
- 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
Abstract
The utility model discloses a primary frequency modulation system of a thermal power generating unit based on new energy power generation equipment, which comprises a high-voltage bus, a main transformer, a generator, a high-voltage station transformer, a 6kV station power bus, a boosting transformer and new energy power generation equipment, wherein the high-voltage station transformer is connected with the main transformer; the new energy power generation equipment is connected to the high-voltage station transformer through a new energy outlet circuit breaker by a step-up transformer; the generator is connected to the high-voltage bus through a main transformer and a generator outlet circuit breaker, and the generator is connected to the 6kV station service bus through a high-voltage station service transformer and a high-voltage station service circuit breaker. The utility model can greatly improve and promote the response quality of primary frequency modulation and increase the economic benefit of power generation enterprises.
Description
Technical Field
The utility model belongs to the technical field of thermal power generation, and particularly relates to a primary frequency modulation system of a thermal power generating unit based on new energy power generation equipment.
Background
In a domestic thermal power plant, because of the influence of objective factors such as fluctuation of power supply coal quality and low online measurement precision of a wind powder system, when the load rate is increased and decreased quickly, a control system is difficult to ensure the stable parameters of a unit, and the coal consumption and abrasion of the unit are aggravated. Although the high-voltage gate-regulating throttling technology and the multivariable collaborative optimization system adopted at present can greatly improve the quick adjustment capability of the unit and simultaneously take the operation stability and the long-term energy-saving benefit of the unit into consideration, a certain difference still exists between the actual load change of the unit and the ideal load change curve required by the primary frequency modulation assessment of a power grid, and therefore the deficiency of unit load response needs to be supplemented by other means.
In the prior art, an energy storage battery is generally used for participating in primary frequency modulation control of a thermal power plant, but the transformation of the energy storage battery is complex, the workload of the transformation of an original system is large, and meanwhile, the cost of the energy storage battery and a related inverter system is too high and the energy storage battery and the related inverter system are easy to damage. The new energy power generation equipment can control the generated power of the new energy power generation equipment in real time, and has the advantages of high response speed, accurate control and the like. Some thermal power factory electrical systems have accessed new forms of energy power generating equipment, but its power signal does not access PMU system, can not participate in the primary frequency modulation of thermal power unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a thermal power generating unit primary frequency modulation system based on new energy power generating equipment, aiming at the problems that the existing new energy power generating equipment accessed by station service cannot participate in unit primary frequency modulation and cannot help the unit to improve the primary frequency modulation performance.
In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:
a primary frequency modulation system of a thermal power generating unit based on new energy power generation equipment comprises a high-voltage bus, a main transformer, a generator, a high-voltage station transformer, a 6kV station bus, a boosting transformer and new energy power generation equipment; wherein the content of the first and second substances,
the new energy power generation equipment is connected to the high-voltage station transformer through the new energy outlet circuit breaker by the booster transformer; the generator is connected to the high-voltage bus through a main transformer and a generator outlet circuit breaker, and the generator is connected to the 6kV station service bus through a high-voltage station service transformer and a high-voltage station service circuit breaker.
The utility model is further improved in that the new energy power generation equipment can rapidly control the generated power, namely the new energy power generation equipment can change the generated power transmitted to the plant power system in real time.
The utility model is further improved in that the system also comprises a Phasor Measurement Unit (PMU), wherein the current and voltage signals at the outlet of the generator are connected into the PMU through a cable, the current and voltage signals at the outlet of the new energy power generation equipment are connected into the PMU through a cable, and the PMU is used for calculating the power of the generator and the power generated by the new energy equipment and uploading the sum of the power of the generator and the power generated by the new energy as the total power generated by the unit to a dispatching center.
The power control strategy of the new energy power generation equipment is configured according to the primary frequency modulation capability of the original unit, so that the sum of the generating power of the unit and the generating power of the new energy power generation equipment meets the primary frequency modulation index, the primary frequency modulation performance of the unit is improved, and primary frequency modulation examination is avoided.
The utility model has the further improvement that the unit normally operates, the new energy power generation equipment is accessed into a plant power system of the unit and participates in primary frequency modulation of the unit when the new energy power generation equipment normally operates, and the generator outlet circuit breaker, the high-voltage plant circuit breaker and the new energy outlet circuit breaker are in a closed position.
The utility model is further improved in that the machine set and the new energy power generation equipment participate in primary frequency modulation of the machine set, when the frequency of the machine set is higher than a dead zone (50+0.033) Hz of primary frequency modulation action or the rotating speed of the machine set is higher than (3000+2) r/min, the primary frequency modulation action of the machine set is carried out, the machine set carries out load reduction, the new energy power generation equipment simultaneously participates in primary frequency modulation and reduces power generation power, the current and voltage signals of the generator and the current and voltage signals of the new energy power generation equipment are transmitted to a phasor measurement device PMU, the phasor measurement device PMU calculates the power of the generator and the power generation power of the new energy equipment, and the sum of the power of the generator and the power generation power of the new energy equipment is transmitted to a dispatching center as primary frequency modulation data of the machine set.
The utility model is further improved in that when the frequency of the unit is lower than the dead zone (50-0.033) Hz of the primary frequency modulation action or the rotating speed of the unit is higher than (3000-2) r/min, the primary frequency modulation action of the unit is carried out, the load of the unit is increased, the new energy power generation equipment simultaneously participates in the primary frequency modulation and increases the power generation power, the current and the voltage signals of the generator and the current and the voltage signals of the new energy power generation equipment are transmitted to a phasor measurement unit PMU, the phasor measurement unit PMU calculates the power of the generator and the power generation power of the new energy equipment, and the sum of the power of the generator and the power generation power of the new energy equipment is transmitted to a dispatching center as primary frequency modulation data of the unit.
The utility model has the further improvement that when the unit normally operates and the new energy power generation equipment stops operating, the new energy power generation equipment is disconnected with the station service system and does not participate in primary frequency modulation of the unit, the generator outlet circuit breaker and the high-voltage station service circuit breaker are in a closed position, and the new energy outlet circuit breaker is in a separated position; the unit participates in primary frequency modulation, and the power of the generator is transmitted to a dispatching center through a Phasor Measurement Unit (PMU) to serve as primary frequency modulation data of the unit.
Compared with the prior art, the utility model has at least the following advantages:
1. the utility model utilizes the original new energy equipment accessed to the service power system, and the service power system of the thermal power unit is slightly changed.
2. The current and voltage signals at the outlet of the generator are connected into a Phasor Measurement Unit (PMU) through a cable, the current and voltage signals at the outlet of the new energy power generation equipment are connected into the PMU through the cable, the PMU calculates the power of the generator and the power generated by the new energy equipment, and the sum of the power of the generator and the power generated by the new energy equipment is used as the total power generated by the unit and is uploaded to a dispatching center, so that the response quality of primary frequency modulation is effectively improved, the requirement of an assessment index is met, primary frequency modulation assessment is reduced/avoided, and the economic benefit of a power generation enterprise is improved.
Drawings
Fig. 1 is a schematic diagram of a primary frequency modulation system of a thermal power generating unit based on new energy power generation equipment.
Fig. 2 is a schematic diagram of a new energy power generation device participating in primary frequency modulation operation of a thermal power generating unit.
Fig. 3 is a schematic diagram of the operation of the generator set when the new energy power generation equipment is shut down.
Description of reference numerals:
the system comprises a 1-220kV high-voltage bus, a 2-main transformer, a 3-Phasor Measurement Unit (PMU), a 4-generator, a 5-high-voltage station transformer, a 6-6kV station bus, a 7-step-up transformer and 8-new energy power generation equipment.
101-generator outlet circuit breaker, 201-high voltage service circuit breaker, 202-new energy outlet circuit breaker.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
As shown in fig. 1, the primary frequency modulation system of the thermal power generating unit based on the new energy power generation equipment provided by the utility model comprises a high-voltage bus 1, a main transformer 2, a phasor measurement unit PMU3, a generator 4, a high-voltage station transformer 5, a 6kV station transformer bus 6, a step-up transformer 7 and new energy power generation equipment 8; the new energy power generation equipment 8 is connected to the high-voltage station transformer 5 through a new energy outlet circuit breaker 202 through a step-up transformer 7; the generator 4 is connected to the high-voltage bus 1 through the main transformer 2 through the generator outlet circuit breaker 101, and the generator 4 is connected to the 6kV station bus 7 through the high-voltage station transformer 5 through the high-voltage station circuit breaker 201.
The working principle of the utility model is as follows:
the current and voltage signals at the outlet of the generator 4 are connected into a phasor measurement unit PMU3 through a cable, the current and voltage signals at the outlet of the new energy power generation equipment 8 are connected into a phasor measurement unit PMU3 through a cable, and the phasor measurement unit PMU3 calculates the generator power and the new energy equipment power generation power and transmits the sum of the generator power and the new energy power generation power as the total unit power generation power to a dispatching center.
As shown in fig. 2, when the unit normally operates, and the new energy power generation equipment normally operates, the new energy power generation equipment is connected to the plant power system of the unit and participates in primary frequency modulation of the unit, and the generator outlet circuit breaker 101, the high-voltage plant circuit breaker 201 and the new energy outlet circuit breaker 202 are in a closed position; when the frequency of the unit is higher than a primary frequency modulation action dead zone (50+0.033) Hz or the rotating speed of the unit is higher than (3000+2) r/min, the unit performs primary frequency modulation action, the unit reduces load, the new energy power generation equipment simultaneously participates in primary frequency modulation to reduce power generation power, the current and voltage signals of a generator and the current and voltage signals of the new energy power generation equipment are transmitted to a phasor measurement device (PMU), the PMU calculates the power of the generator and the power generation power of the new energy equipment, and the sum of the power of the generator and the power generation power of the new energy equipment is transmitted to a dispatching center as primary frequency modulation data of the unit; when the frequency of the unit is lower than a primary frequency modulation action dead zone (50-0.033) Hz or the rotating speed of the unit is higher than (3000-2) r/min, the primary frequency modulation action of the unit is carried out, the unit is subjected to load increase, the new energy power generation equipment simultaneously participates in primary frequency modulation, the power generation power is increased, the current and voltage signals of the generator and the current and voltage signals of the new energy power generation equipment are transmitted to a Phasor Measurement Unit (PMU), the phasor measurement unit PMU calculates the power of the generator and the power generation power of the new energy equipment, and the sum of the power of the generator and the power generation power of the new energy equipment is transmitted to a dispatching center to serve as primary frequency modulation data of the unit.
As shown in fig. 3, when the unit normally operates, and the new energy power generation equipment stops operating, the new energy power generation equipment is disconnected from the service system, and does not participate in primary frequency modulation of the unit, the generator outlet circuit breaker 101 and the high-voltage service circuit breaker 201 are in a closed position, and the new energy outlet circuit breaker 202 is in a separated position; the unit participates in primary frequency modulation, and the power of the generator is transmitted to a dispatching center through a Phasor Measurement Unit (PMU) to serve as primary frequency modulation data of the unit.
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 belong to the protection scope of the technical solution of the present invention.
Claims (4)
1. A primary frequency modulation system of a thermal power generating unit based on new energy power generation equipment is characterized by comprising a high-voltage bus (1), a main transformer (2), a Phasor Measurement Unit (PMU) (3), a generator (4), a high-voltage station transformer (5), a 6kV station power bus (6), a boosting transformer (7) and new energy power generation equipment (8); wherein the content of the first and second substances,
the new energy power generation equipment (8) is connected to the high-voltage station transformer (5) through a new energy outlet circuit breaker (202) through a step-up transformer (7); the generator (4) is connected to the high-voltage bus (1) through a main transformer (2) and a generator outlet circuit breaker (101), and the generator (4) is connected to the 6kV station power bus (6) through a high-voltage station power transformer (5) and a high-voltage station power circuit breaker (201);
outlet current and voltage signals of the generator (4) are connected into a Phasor Measurement Unit (PMU) (3) through a cable, outlet current and voltage signals of the new energy power generation equipment (8) are connected into the Phasor Measurement Unit (PMU) (3) through a cable, and the Phasor Measurement Unit (PMU) (3) is used for calculating the power of the generator and the power generated by the new energy equipment and uploading the sum of the power of the generator and the power generated by the new energy as the total power generated by the unit to a dispatching center.
2. The thermal power generating unit primary frequency modulation system based on the new energy power generating equipment is characterized in that the new energy power generating equipment (8) can rapidly control the generated power, namely the new energy power generating equipment can change the generated power transmitted to a plant power system in real time.
3. The thermal power generating unit primary frequency modulation system based on the new energy power generating equipment as claimed in claim 1, wherein the thermal power generating unit operates normally, when the new energy power generating equipment operates normally, the new energy power generating equipment is connected into a plant service power system of the thermal power generating unit and participates in primary frequency modulation of the thermal power generating unit, and the generator outlet circuit breaker (101), the high-voltage plant service circuit breaker (201) and the new energy outlet circuit breaker (202) are in a closed position.
4. The thermal power generating unit primary frequency modulation system based on the new energy power generating equipment is characterized in that the thermal power generating unit normally operates, when the new energy power generating equipment stops operating, the new energy power generating equipment is disconnected with a service system and does not participate in primary frequency modulation of the thermal power generating unit, a generator outlet circuit breaker (101) and a high-voltage service circuit breaker (201) are in a closed position, and a new energy outlet circuit breaker (202) is in an open position; the unit participates in primary frequency modulation, and the power of the generator is transmitted to a dispatching center through a Phasor Measurement Unit (PMU) to serve as primary frequency modulation data of the unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121437768.7U CN215817557U (en) | 2021-06-25 | 2021-06-25 | Primary frequency modulation system of thermal power generating unit based on new energy power generation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121437768.7U CN215817557U (en) | 2021-06-25 | 2021-06-25 | Primary frequency modulation system of thermal power generating unit based on new energy power generation equipment |
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| CN215817557U true CN215817557U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121437768.7U Active CN215817557U (en) | 2021-06-25 | 2021-06-25 | Primary frequency modulation system of thermal power generating unit based on new energy power generation equipment |
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2021
- 2021-06-25 CN CN202121437768.7U patent/CN215817557U/en active Active
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