CN211405498U - Super capacitor auxiliary frequency modulation system suitable for multiple units of thermal power plant - Google Patents
Super capacitor auxiliary frequency modulation system suitable for multiple units of thermal power plant Download PDFInfo
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- CN211405498U CN211405498U CN201921729082.8U CN201921729082U CN211405498U CN 211405498 U CN211405498 U CN 211405498U CN 201921729082 U CN201921729082 U CN 201921729082U CN 211405498 U CN211405498 U CN 211405498U
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Abstract
The utility model discloses a super capacitor auxiliary frequency modulation system suitable for a plurality of units of a thermal power plant, which comprises a plant power system and an energy storage system; the energy storage system is connected to two auxiliary buses of the auxiliary power system through two high-voltage switches respectively. Specifically, the service power system comprises two unit DCS, two generators, two high-voltage transformers, a first service bus, a first communication line, a second service bus and the like; the energy storage system comprises two step-up transformers, two bidirectional power conversion devices, two super capacitors, a third communication line, two energy storage monitoring systems, a fourth communication line, a fifth communication line, a sixth communication line, two energy storage subsystems and the like. The utility model discloses the wiring is clear simple, the switching is convenient, the security is good, longe-lived, reduces the throttle loss, prevents the boiler overtemperature, alleviates the examination, improves supplementary income, and the economic nature is considerable.
Description
Technical Field
The utility model relates to a thermal power unit frequency modulation system is assisted in energy storage, concretely relates to supplementary frequency modulation system of super capacitor who is applicable to many units of thermal power plant.
Background
Since the thermal power generating units are all composed of mechanical devices with rotational inertia and a series of complex processes are needed for converting primary energy into electric energy, the regulation response speed of the thermal power generating units to active power is slow. Under the large background that new energy installation and power generation continue to grow continuously and rapidly, the power grid frequency modulation demand and the market scale become larger and larger, the thermal power generating unit can perform heavier and heavier frequency modulation tasks, and the thermal power generating unit faces negative influences on the aspects of equipment abrasion, coal consumption increase, operation safety and the like, so that the economy, safety and reliability of the unit and the power grid are not facilitated. The power grid has urgent need for a high-quality frequency modulation power supply, and the frequency modulation of the energy storage auxiliary unit becomes an effective measure for improving the frequency modulation auxiliary service level of the current thermal power plant, lightening the frequency modulation assessment, increasing the auxiliary service income, relieving the frequency modulation pressure of the unit and reducing the throttling loss.
At present, in the actual engineering application of a thermal power plant, an energy storage system for assisting the frequency modulation of a unit is mainly a lithium battery. However, the lithium battery has the defect of service life in the aspect of frequency modulation of the thermal power generating unit, and the theoretical service life of the lithium battery in a 2C/100% DOD state is not more than 5000 times. In consideration of the characteristics and frequency of unit adjustment, batteries with enough capacity must be selected to meet the requirements of shallow charging and discharging and prolonging the service life. In addition, the conventional lithium battery auxiliary frequency modulation projects only respond to AGC with auxiliary service subsidies, but not respond to primary frequency modulation with examination. After the lithium battery auxiliary frequency modulation project is built, the unit still operates according to the original operation mode, and the main steam control valve still keeps large throttling loss. The technical defects of the method cause that the project can be developed only in Shanxi, inner Mongolia, Guangdong and other places with higher subsidies and is difficult to popularize in other areas.
SUMMERY OF THE UTILITY MODEL
The utility model aims at under the continuous perfect background in current frequency modulation auxiliary service market, it is heavy to current thermal power generating unit frequency modulation task, equipment wearing and tearing aggravate, the throttle loss increases, there is the problem of potential safety hazards such as boiler overtemperature, a supplementary frequency modulation system of super capacitor who is applicable to many units of thermal power plant is provided, its wiring is clear simple, the switching is convenient, the security is good, long-lived, reduce the throttle loss, prevent the boiler overtemperature, alleviate the examination, improve supplementary income, the economy is considerable.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a super capacitor auxiliary frequency modulation system suitable for multiple units of a thermal power plant comprises a plant power system and an energy storage system; the energy storage system is connected to two auxiliary buses of the auxiliary power system through two high-voltage switches respectively.
The utility model discloses a further improvement lies in, the station service electrical system includes #1 unit DCS, #1 generator, #1 high-voltage substation, first high voltage switch, #1 unit A section generating line, second high voltage switch, #1 unit B section generating line, third high voltage switch, first station service generating line, first communication line, second communication line, #2 unit DCS, #2 generator, #2 high-voltage substation, fourth high voltage switch, #2 unit B section generating line, fifth high voltage switch, #2 unit A section generating line, sixth high voltage switch and second station service generating line; wherein the content of the first and second substances,
the #1 generator and the #2 generator are respectively in communication with the #1 unit DCS and the #2 unit DCS, and the #1 unit DCS and the #2 unit DCS are communicated with each other through a second communication line and are communicated with the dispatching through a first communication line; the #1 generator is connected to the #1 unit A section bus and the #1 unit B section bus in a voltage reduction mode through the #1 high-voltage transformer and the first high-voltage switch in sequence, and the #1 unit A section bus and the #1 unit B section bus are connected to the first service bus and the second service bus through the second high-voltage switch and the fifth high-voltage switch respectively; the #2 generator loops through the #2 high-voltage transformer and is connected to the #2 unit B section bus and the #2 unit A section bus in a step-down mode through the fourth high-voltage switch, the #2 unit B section bus and the #2 unit A section bus are connected to the first station bus and the second station bus through the third high-voltage switch and the sixth high-voltage switch respectively.
The utility model discloses further improvement lies in, and first mill is with generating line and the second mill is with generating line 6kV mill.
The utility model discloses a further improvement lies in, energy storage system includes seventh high-voltage switch, first boost change, first bidirectional power conversion device, first super capacitor, third communication line, first energy storage monitored control system, fourth communication line, fifth communication line, second energy storage monitored control system, sixth communication line, eighth high-voltage switch, second boost change, second bidirectional power conversion device, second super capacitor, first energy storage subsystem and second energy storage subsystem; wherein the content of the first and second substances,
the first super capacitor is connected to a first service bus sequentially through a first bidirectional power conversion device, a first boost transformer and a seventh high-voltage switch, and the first energy storage monitoring system is communicated with the first energy storage subsystem and the #1 unit DCS through a third communication line and a fourth communication line respectively; the second super capacitor is connected to a second service bus sequentially through the second bidirectional power conversion device, the second boost transformer and the eighth high-voltage switch, and the second energy storage monitoring system is communicated with the second energy storage subsystem and the #2 unit DCS through a sixth communication line and a fifth communication line respectively.
The utility model discloses further improvement lies in, all sets up the interlocking function between second high tension switchgear and the third high tension switchgear and between fifth high tension switchgear and the sixth high tension switchgear.
Compared with the prior art, the utility model discloses following profitable technological effect has at least:
1. the utility model discloses the system architecture is clear, and the wiring is simple, and the super capacitor who inserts the station service optimizes the charge-discharge according to scheduling instruction and unit output, can realize the control of the two in coordination through external accuse system of assisting and the built-in logic of DCS for thermal power unit does not need to do great change to the unit according to former mode response scheduling instruction basically.
2. The utility model discloses super capacitor divide into two energy storage subsystems, and two subsystems can assist #1 respectively, #2 unit to participate in the frequency modulation or merge and participate in a unit frequency modulation, have realized that super capacitor switches according to the light of actual frequency modulation power demand between two units.
3. The super capacitor used in the utility model is different from the traditional chemical power supply, and does not generate chemical reaction in the auxiliary frequency modulation process, thereby having good safety; meanwhile, the service life of the super capacitor is ultra-long, and excessive allowance can not be considered when the super capacitor is used for assisting in the selection of frequency modulation projects, so that the total investment of the projects is more advantageous although the unit cost is higher.
4. The super capacitor in the utility model has fast charging speed, and can be charged fast in the auxiliary frequency modulation process for the response of the next disturbance; meanwhile, the super capacitor is high in power density which is 5-10 times that of a lithium battery, and is ultra-strong in discharge capacity, so that the super capacitor is particularly suitable for frequency modulation occasions requiring short-time high power. Due to the excellent charging and discharging characteristics of the super capacitor, an AGC instruction can be quickly and accurately tracked in secondary frequency modulation, the power requirements of different frequency fluctuation levels are met in primary frequency modulation, the abrasion of a unit is reduced, and meanwhile, the examination and the auxiliary benefit are reduced and increased.
5. The utility model discloses super capacitor can replace the accent door to adjust and exert oneself, and the main vapour accent door operation aperture obtains improving by a wide margin under stable operating mode, and the throttle loss of main vapour accent door falls to being close design level under the full-open. Under different loads, the improvement effect on the power supply coal consumption of the unit is obvious, the energy-saving benefit is good, and the economical efficiency of the unit operation is improved.
6. The utility model eliminates the potential safety hazard caused by the instability of the main steam pressure in the throttling regulation operation mode of the main steam control valve on the one hand; meanwhile, under the AGC R mode of the thermal power generating unit, the adverse effects of boiler overtemperature, scale skin falling and even pipe explosion can be avoided by rapidly lifting the load of the super-capacitor auxiliary unit, so that the purpose of ensuring the safety of the boiler is achieved, and the safety and reliability of the long-term operation of the unit are improved.
To sum up, the utility model discloses safe and reliable, economic benefits are showing, the practicality is strong and convenient to popularize and use.
Drawings
Fig. 1 is a structural schematic diagram of the present invention.
Description of reference numerals:
1-a service power system; 2-an energy storage system; 1- #1 unit dcs (distributed Control system); 1-2- #1 generator; 1-3- #1 high plant change; 1-4 — a first high voltage switch; 1-5- #1 unit A section bus; 1-6-second high voltage switch; 1-7- #1 unit B section bus; 1-8-a third high voltage switch; 1-9-a first service bus; 1-10-a first communication line; 1-11-a second communication line; 1-12- #2 unit dcs (distributed Control system); 1-13- #2 generator; 1-14- #2 high plant change; 1-15-fourth high voltage switch; 1-16- #2 unit B section bus; 1-17-a fifth high voltage switch; 1-18- #2 unit A section bus; 1-19-sixth high voltage switch; 1-20-a second service bus; 2-1-a seventh high voltage switch; 2-first step-up voltage change; 2-3 — first bidirectional Power Conversion device (PCS, Power Conversion System); 2-4 — a first supercapacitor; 2-5-a third communication line; 2-6-a first energy storage monitoring system; 2-7-a fourth communication line; 2-8-a fifth communication line; 2-9-a second energy storage monitoring system; 2-10-a sixth communication line; 2-11 — eighth high voltage switch; 2-12-second step-up voltage change; 2-13-second bidirectional Power Conversion device (PCS, Power Conversion System); 2-14 — a second supercapacitor; 2-15 — a first energy storage subsystem; 2-16 — the second energy storage subsystem.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a super capacitor auxiliary frequency modulation system suitable for multiple units of a thermal power plant, which comprises an auxiliary power system 1 and an energy system 2; the energy storage system 2 is connected to a first service bus 1-9 and a second service bus 1-20 of the service system 1 through a seventh high-voltage switch 2-1 and an eighth high-voltage switch 2-11, and both the service buses are 6kV service buses.
Specifically, the service power system 1 comprises #1 unit DCS1-1, #1 generator 1-2, #1 high-voltage plant transformer 1-3, first high-voltage switch 1-4, #1 unit A section bus 1-5, second high-voltage switch 1-6, #1 unit B section bus 1-7, third high-voltage switch 1-8, first service bus 1-9, first communication line 1-10, second communication line 1-11, #2 unit DCS1-12, #2 generator 1-13, #2 high-voltage plant transformer 1-14, fourth high-voltage switch 1-15, #2 unit B section bus 1-16, fifth high-voltage switch 1-17, #2 unit A section bus 1-18, sixth high-voltage switch 1-19 and second service bus 1-20; the #1 generator 1-2 and the #2 generator 1-13 are respectively in communication with the #1 unit DCS1-1 and the #2 unit DCS1-12, and the #1 unit DCS1-1 and the #2 unit DCS1-12 are in communication with each other through the second communication line 1-11 and are also in communication with the dispatching unit through the first communication line 1-10; the #1 generator 1-2 is connected to a section A bus 1-5 of the #1 unit and a section B bus 1-7 of the #1 unit through a #1 high-voltage transformer 1-3 and a first high-voltage switch 1-4 in sequence in a voltage reduction manner, and the section A bus 1-5 of the #1 unit and the section B bus 1-7 of the #1 unit are connected to a first station bus 1-9 and a second station bus 1-20 through a second high-voltage switch 1-6 and a fifth high-voltage switch 1-17 respectively; the #2 generator 1-13 is connected to the #2 unit B section bus 1-16 and the #2 unit A section bus 1-18 through the #2 high-voltage transformer 1-14 and the fourth high-voltage switch 1-15 in sequence in a voltage reduction mode, and the #2 unit B section bus 1-16 and the #2 unit A section bus 1-18 are connected to the first plant bus 1-9 and the second plant bus 1-20 through the third high-voltage switch 1-8 and the sixth high-voltage switch 1-19 respectively. The energy storage System 2 comprises a seventh high-voltage switch 2-1, a first boosting transformer 2-2, a first bidirectional Power Conversion device (PCS) 2-3, a first super capacitor 2-4, a third communication line 2-5, a first energy storage monitoring System 2-6, a fourth communication line 2-7, a fifth communication line 2-8, a second energy storage monitoring System 2-9, a sixth communication line 2-10, an eighth high-voltage switch 2-11, a second boosting transformer 2-12, a second bidirectional Power Conversion device 2-13, a second super capacitor 2-14, a first energy storage subsystem 2-15 and a second energy storage subsystem 2-16; the first super capacitor 2-4 is connected to a first service bus 1-9 sequentially through a first bidirectional power conversion device (PCS) 2-3, a first boost converter 2-2 and a seventh high-voltage switch 2-1, and the first energy storage monitoring System 2-6 is communicated with a first energy storage subsystem 2-15 and a #1 unit DCS1-1 through a third communication line 2-5 and a fourth communication line 2-7 respectively; the second super capacitor 2-14 is connected to a second plant bus 1-20 sequentially through a second bidirectional power conversion device 2-13, a second boost converter 2-12 and an eighth high-voltage switch 2-11, and the second energy storage monitoring system 2-9 is communicated with the second energy storage subsystem 2-16 and the #2 unit DCS1-12 through a sixth communication line 2-10 and a fifth communication line 2-8 respectively.
The utility model discloses in practical application, at the secondary modulation in-process, after the AGC instruction was assigned to electric wire netting dispatch mechanism, send for #1 unit DCS1-1 and #2 unit DCS1-12, instruction information was also received respectively through fourth communication line 2-7 and fifth communication line 2-8 to first energy storage monitored control system 2-6 and second energy storage monitored control system 2-9 simultaneously. Under the condition that both the two units work normally: the seventh high-voltage switch 2-1, the second high-voltage switch 1-6 and the first high-voltage switch 1-4 can be closed, the third high-voltage switch 1-8 is disconnected, and the first energy storage subsystem 2-15 is switched to the section A bus 1-5 of the #1 unit to enable the bus to assist the #1 generator 1-2 to modulate frequency; closing the eighth high-voltage switch 2-11, the sixth high-voltage switch 1-19 and the fourth high-voltage switch 1-15, opening the fifth high-voltage switch 1-17, and switching the second energy storage subsystem 2-16 to the section A bus 1-18 of the #2 unit to enable the second energy storage subsystem to assist the #2 generator 1-13 to modulate frequency; when the charge and discharge of a single sub energy storage system are not enough to meet the requirement of frequency modulation power, priority is set for a #1 generator 1-2, an eighth high-voltage switch 2-11, a third high-voltage switch 1-8, a sixth high-voltage switch 1-19 and a fourth high-voltage switch 1-15 are switched off by closing a seventh high-voltage switch 2-1, a second high-voltage switch 1-6, a fifth high-voltage switch 1-17 and a first high-voltage switch 1-4, and a second energy storage subsystem 2-16 is switched to a bus 1-7 at a section A of a #1 unit while a first energy storage subsystem 2-15 is switched to a bus 1-5 at a section B of the #1 unit, so that the #1 generator 1-2 is assisted to participate in secondary frequency modulation after the two sub energy storage systems are combined; under the condition that #1 generator 1-2 is overhauled in case of power failure: by closing the eighth high-voltage switch 2-11, the third high-voltage switch 1-8, the sixth high-voltage switch 1-19 and the fourth high-voltage switch 1-15 and opening the seventh high-voltage switch 2-1, the second high-voltage switch 1-6, the fifth high-voltage switch 1-17 and the first high-voltage switch 1-4, the first energy storage subsystem 2-15 is switched to the bus 1-16 at the section B of the #2 unit, and the second energy storage subsystem 2-16 is switched to the bus 1-18 at the section A of the #2 unit at the same time, so that the two energy storage subsystems are combined to assist the #2 generator 1-13 to participate in secondary frequency modulation; under the condition that #2 generators 1-13 are overhauled in power failure: by closing the seventh high-voltage switch 2-1, the second high-voltage switch 1-6, the fifth high-voltage switch 1-17 and the first high-voltage switch 1-4 and opening the eighth high-voltage switch 2-11, the third high-voltage switch 1-8, the sixth high-voltage switch 1-19 and the fourth high-voltage switch 1-15, the first energy storage subsystem 2-15 is switched to the bus 1-5 at the section A of the #1 unit, and the second energy storage subsystem 2-16 is switched to the bus 1-7 at the section B of the #1 unit at the same time, so that the two energy storage subsystems are combined to assist the #1 generator 1-2 to participate in secondary frequency modulation.
In the three working conditions, the corresponding unit receives the AGC instruction and then controls the output of the unit to track and dispatch the instruction, meanwhile, the energy storage system 2 monitors the power of the unit in real time, and when the instruction is received, the output of the unit is calculated, and then the quick response is carried out. Along with the response of the unit output to the instruction, the energy storage system 2 gradually exits to complete the auxiliary response process, and in the neutral position of the auxiliary response, the required slow charging and discharging process is completed according to the coordinated scheduling of the unit output condition so as to keep the continuous output capability level of the system. Under each working condition, the second high-voltage switch 1-6, the third high-voltage switch 1-8, the fifth high-voltage switch 1-17 and the sixth high-voltage switch 1-19 are provided with an interlocking function, so that the condition that the same energy storage subsystem is connected to bus sections of different units at the same time due to switching errors is avoided.
Similarly, in the process that the super-capacitor auxiliary unit participates in primary frequency modulation, the energy storage monitoring system controls the charge and discharge capacity according to the frequency change of the power grid and the primary frequency modulation parameters and the output of the corresponding unit, and the power demand of primary frequency modulation under different frequency fluctuation levels is met together with the output of the unit. In the process of primary frequency modulation, the switching and system wiring under various working conditions are basically consistent, only the internal control methods are different, and the same reason is not repeated herein, and in the process of the super capacitor auxiliary unit participating in the primary frequency modulation, the energy storage monitoring system controls the charge and discharge capacity according to the frequency change of the power grid and the output of the corresponding unit, and meets the power requirements of the primary frequency modulation under different frequency fluctuation levels together with the output of the unit. In the primary frequency modulation process, the switching and system wiring under the above various working conditions are basically consistent, but the internal control methods are different, and are not described herein.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's protection scope.
Claims (3)
1. A super capacitor auxiliary frequency modulation system suitable for multiple units of a thermal power plant is characterized by comprising a plant power system (1) and an energy storage system (2); wherein the content of the first and second substances,
the energy storage system (2) is respectively connected to two service buses of the service electric system (1) through two high-voltage switches;
the plant power system (1) comprises a #1 unit DCS (1-1), a #1 generator (1-2), a #1 high-voltage plant transformer (1-3), a first high-voltage switch (1-4), a #1 unit A section bus (1-5), a second high-voltage switch (1-6), a #1 unit B section bus (1-7), a third high-voltage switch (1-8), a first plant bus (1-9), a first communication line (1-10), a second communication line (1-11), a #2 unit DCS (1-12), a #2 generator (1-13), a #2 high-voltage plant transformer (1-14), a fourth high-voltage switch (1-15), a #2 unit B section bus (1-16), a fifth high-voltage switch (1-17), a #2 unit A section bus (1-18), A sixth high-voltage switch (1-19) and a second service bus (1-20); wherein the content of the first and second substances,
the #1 generator (1-2) and the #2 generator (1-13) are respectively in communication connection with the #1 unit DCS (1-1) and the #2 unit DCS (1-12), and the #1 unit DCS (1-1) and the #2 unit DCS (1-12) are communicated with each other through a second communication line (1-11) and simultaneously are communicated with a dispatching station through a first communication line (1-10); the #1 generator (1-2) is connected to a section A bus (1-5) of the #1 unit and a section B bus (1-7) of the #1 unit sequentially through a #1 high-voltage transformer (1-3) and a first high-voltage switch (1-4) in a voltage reduction mode, and the section A bus (1-5) of the #1 unit and the section B bus (1-7) of the #1 unit are connected to a first service bus (1-9) and a second service bus (1-20) through a second high-voltage switch (1-6) and a fifth high-voltage switch (1-17) respectively; the #2 generator (1-13) is connected to a section B bus (1-16) of the #2 unit and a section A bus (1-18) of the #2 unit in a voltage reduction mode sequentially through a #2 high-voltage transformer (1-14) and a fourth high-voltage switch (1-15), and the section B bus (1-16) of the #2 unit and the section A bus (1-18) of the #2 unit are connected to a first service bus (1-9) and a second service bus (1-20) respectively through a third high-voltage switch (1-8) and a sixth high-voltage switch (1-19);
the energy storage system (2) comprises a seventh high-voltage switch (2-1), a first boost transformer (2-2), a first bidirectional power conversion device (2-3), a first super capacitor (2-4), a third communication line (2-5), a first energy storage monitoring system (2-6), a fourth communication line (2-7), a fifth communication line (2-8), a second energy storage monitoring system (2-9), a sixth communication line (2-10), an eighth high-voltage switch (2-11), a second boost transformer (2-12), a second bidirectional power conversion device (2-13), a second super capacitor (2-14), a first energy storage subsystem (2-15) and a second energy storage subsystem (2-16); wherein the content of the first and second substances,
the first super capacitor (2-4) is connected to a first service bus (1-9) sequentially through a first bidirectional power conversion device (2-3), a first boost transformer (2-2) and a seventh high-voltage switch (2-1), and the first energy storage monitoring system (2-6) is communicated with a first energy storage subsystem (2-15) and a #1 unit DCS (1-1) through a third communication line (2-5) and a fourth communication line (2-7) respectively; the second super capacitor (2-14) is connected to a second service bus (1-20) sequentially through a second bidirectional power conversion device (2-13), a second boost transformer (2-12) and an eighth high-voltage switch (2-11), and the second energy storage monitoring system (2-9) is communicated with a second energy storage subsystem (2-16) and a #2 unit DCS (1-12) through a sixth communication line (2-10) and a fifth communication line (2-8) respectively.
2. The supercapacitor auxiliary frequency modulation system suitable for multiple units of a thermal power plant according to claim 1, wherein the first service bus (1-9) and the second service bus (1-20) are both 6kV service buses.
3. The supercapacitor auxiliary frequency modulation system suitable for multiple units of a thermal power plant according to claim 1, wherein an interlocking function is provided between the second high-voltage switch (1-6) and the third high-voltage switch (1-8) and between the fifth high-voltage switch (1-17) and the sixth high-voltage switch (1-19).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825482A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Super capacitor voltage stabilizing system and method for thermal power frequency modulation |
| CN114825484A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Frequency modulation system and method based on energy storage of thermal power electronic transformer |
| CN115603337A (en) * | 2022-11-21 | 2023-01-13 | 西安热工研究院有限公司（Cn） | Economic frequency modulation system and method based on super capacitor |
-
2019
- 2019-10-15 CN CN201921729082.8U patent/CN211405498U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825482A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Super capacitor voltage stabilizing system and method for thermal power frequency modulation |
| CN114825484A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Frequency modulation system and method based on energy storage of thermal power electronic transformer |
| WO2024001692A1 (en) * | 2022-06-29 | 2024-01-04 | 华能罗源发电有限责任公司 | Electronic voltage and frequency regulation system for thermal-power energy storage |
| CN115603337A (en) * | 2022-11-21 | 2023-01-13 | 西安热工研究院有限公司（Cn） | Economic frequency modulation system and method based on super capacitor |
| CN115603337B (en) * | 2022-11-21 | 2023-04-07 | 西安热工研究院有限公司 | Economic frequency modulation system and method based on super capacitor |
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