Primary frequency modulation active test system

Abstract

The utility model discloses a primary frequency modulation active test system. The primary frequency modulation active test system is connected with a primary frequency modulation test master station of a dispatching center through a dispatching data network. The primary frequency modulation active test system comprises a primary frequency modulation test substation communication manager, a primary frequency modulation test substation test device and a longitudinal encryption device. The primary frequency modulation test substation communication management machine is connected with the primary frequency modulation test substation test device through a network cable, and the primary frequency modulation test substation communication management machine is connected with a scheduling data network through a longitudinal encryption device. The primary frequency modulation active test system meets the test function requirement of the power grid on primary frequency modulation, the primary frequency modulation performance of the grid-connected power supply of the power grid is further improved, and the serious fault resistance of the power grid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency modulation testing, in particular to a primary frequency modulation active testing system. Background Art

[0002] In order to further improve the primary frequency regulation performance of grid-connected power sources and enhance the grid's ability to resist severe faults, various grid companies have successively put forward requirements for the active online testing function of primary frequency regulation of grid-connected power sources. The power dispatching agency proposes to regularly conduct simulated disturbance tests on grid-connected power sources through the active online testing system for primary frequency regulation to verify whether the large frequency difference frequency regulation performance of the grid-connected power source meets the requirements for safe and stable operation of the grid. The substation on the plant side controls the grid-connected power source to perform a primary frequency regulation response by receiving the simulated frequency curve sent by the main station on the dispatching side, and implements remote online testing of primary frequency regulation based on the response.

[0003] The primary frequency regulation function of thermal power plants is generally integrated in the digital electro-hydraulic control system (DEH) of steam turbines. When the power system has frequency deviation, it adjusts the output of the generator, participates in the primary frequency regulation of the power grid, and provides frequency support for the system. Under the conventional primary frequency regulation assessment, the power grid dispatching end receives simple "primary frequency regulation input / exit signals", "primary frequency regulation action signals, reset signals", etc. through the telecontrol system, which cannot fully judge the primary frequency regulation operation status of the unit and the action level of the unit under various working conditions.

[0004] The compressed air energy storage power station is divided into an expansion energy release process and a compression energy storage process. During the expansion energy release process, the primary frequency regulation function is generally integrated in the digital electro-hydraulic control system (DEH) supporting the air turbine. In the expansion energy release stage, when the power system has a frequency deviation, the output of the turbine is adjusted by DEH to participate in the primary frequency regulation of the power grid and provide frequency support for the system. In the compression energy storage process, the primary frequency regulation response function is generally integrated in the compressor control system (CCS) supporting the compressor. In the compression energy storage stage, when the power system has a frequency deviation, the power consumption of the compressor system is adjusted by CCS to respond to the primary frequency regulation of the power grid.

[0005] Therefore, it is necessary to design an active primary frequency modulation test system to meet the test function of the power grid for primary frequency modulation. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a primary frequency modulation active testing system.

[0007] To achieve the above-mentioned purpose, the utility model is designed with a primary frequency modulation active test system, which is connected to the primary frequency modulation test main station of the dispatching center through a dispatching data network; the primary frequency modulation active test system includes a primary frequency modulation test substation communication management machine, a primary frequency modulation test substation test device and a longitudinal encryption device; the primary frequency modulation test substation communication management machine is connected to the primary frequency modulation test substation test device through a network cable, and the primary frequency modulation test substation communication management machine is connected to the dispatching data network through the longitudinal encryption device.

[0008] As a preferred implementation mode, the time input end of the primary frequency modulation test substation communication management machine and the primary frequency modulation test substation test device is connected to the time output end of the clock synchronization system of the power plant or power station.

[0009] As a preferred implementation, the primary frequency modulation test substation test device is connected to the generator outlet CT (current transformer) by hard wiring.

[0010] As a preferred implementation, the primary frequency modulation test substation test device is connected to the generator outlet PT (voltage transformer) by hard wiring.

[0011] As a preferred implementation, the primary frequency modulation test substation test device is connected to a PMU (Phasor Measurement Unit) by hard wiring.

[0012] As a preferred implementation, the primary frequency modulation test substation test device is connected to a DCS (distributed control system) by hard wiring.

[0013] As a preferred implementation, the primary frequency modulation test substation test device is connected to the DEH (digital electro-hydraulic control system) by hard wiring.

[0014] As a preferred implementation, the primary frequency modulation test substation test device is connected to the CCS (compressor control system) by hard wiring.

[0015] As a preferred implementation, the primary frequency modulation active test system is arranged in a thermal power plant or a compressed air energy storage power plant.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] Firstly, the primary frequency modulation active test system of the utility model meets the test function requirements of the power grid for primary frequency modulation, further improves the primary frequency modulation performance of the grid-connected power supply, and improves the ability of the power grid to resist serious faults.

[0018] Secondly, the primary frequency regulation active test system of the utility model utilizes the data of the generator outlet CT, generator outlet PT, PMU, DCS, DEH and CCS (only available in compressed air energy storage power stations) systems of power plants and compressed air energy storage power stations to realize the system's regular simulated disturbance testing of the grid-connected power supply, ensuring that it can respond quickly and accurately in the first time when the power grid needs it. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a primary frequency modulation active test system of the utility model;

[0020] In the figure, 1-primary frequency regulation active test system, 11-primary frequency regulation test substation communication management machine, 12-primary frequency regulation test substation test device, 13-longitudinal encryption device, 2-dispatching data network, 3-dispatching center primary frequency regulation test main station, 4-generator outlet CT, 5-generator outlet PT, 6-PMU, 7-DCS, 8-DEH, 9-CCS. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below in conjunction with specific embodiments, but those skilled in the art will understand that the following embodiments are part of the present invention, not all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figure 1As shown, a primary frequency modulation active test system of the utility model is used to be set in a thermal power plant or a compressed air energy storage power station. The primary frequency modulation active test system 1 is connected to the primary frequency modulation test master station 3 of the dispatching center through the dispatching data network 2; the primary frequency modulation active test system 1 includes a primary frequency modulation test substation communication management machine 11, a primary frequency modulation test substation test device 12 and a longitudinal encryption device 13; the primary frequency modulation test substation communication management machine 11 is connected to the primary frequency modulation test substation test device 12 through a network cable, and after data interaction with the primary frequency modulation test master station of the dispatching center, the communication protocol analysis, command forwarding and data storage functions are completed. The primary frequency modulation test substation communication management machine 11 is connected to the dispatching data network 2 through the longitudinal encryption device 13.

[0024] The time input terminals of the primary frequency modulation test substation communication management machine 11 and the primary frequency modulation test substation test device 12 are connected to the time output terminals of the power plant or power station clock synchronization system. The primary frequency modulation test substation communication management machine and the primary frequency modulation test substation test device both receive the time synchronization of the power plant / power station clock synchronization system. The primary frequency modulation test substation test device 12 is connected to the secondary side of the generator outlet CT4 by hard wiring, and collects the generator outlet current signal by AC quantity collection.

[0025] The primary frequency modulation test substation test device 12 is connected to the secondary side of the generator outlet PT5 by hard wiring, and collects the generator outlet voltage signal by AC quantity collection. The primary frequency modulation test substation test device 12 is connected to PMU6 by hard wiring, performs PMU power angle output adjustment, performs primary frequency modulation test disturbance frequency adjustment; and sends out a primary frequency modulation test comprehensive permission signal. The primary frequency modulation test substation test device 12 is connected to DCS7 by hard wiring, and sends out the unit primary frequency modulation entry / exit test instruction; executes the unit primary frequency modulation test disturbance frequency adjustment; receives the primary frequency modulation load instruction feedback; receives the unit primary frequency modulation commissioning, unit primary frequency modulation action, unit primary frequency modulation test permission, and unit primary frequency modulation test action signal feedback. The primary frequency modulation test substation test device 12 is connected to DEH8 by hard wiring, and sends out the primary frequency modulation entry / exit test command of the unit; performs the primary frequency modulation test device state adjustment and the primary frequency modulation test disturbance frequency adjustment; receives the unit primary frequency modulation test action feedback; receives the unit primary frequency modulation test disturbance frequency, frequency modulation dead zone, frequency modulation command limit, speed inequality rate, and coordinated control load lower limit feedback; sends out the primary frequency modulation active test system abnormal alarm signal. The primary frequency modulation test substation test device 12 is connected to CCS9 by hard wiring, and sends out the primary frequency modulation entry / exit test command; receives the primary frequency modulation test action feedback; receives the primary frequency modulation load command feedback. This item is only applicable to compressed air energy storage power stations.

[0026] The primary frequency regulation active test system of the utility model utilizes the data of the generator outlet CT, generator outlet PT, PMU, DCS, DEH and CCS (only available in compressed air energy storage power station) systems of power plants and compressed air energy storage power stations to realize the system's regular simulated disturbance test of the grid-connected power supply, ensuring that it can respond quickly and accurately in the first time when the power grid needs it, and meeting the power grid's function of active testing of primary frequency regulation of thermal power plants and compressed air energy storage power stations.

[0027] The above are only specific implementation methods of the present invention. It should be pointed out that any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention, and the rest not described in detail belong to the prior art.

Claims

1. A primary frequency modulation active test system, Features: The primary frequency modulation active test system (1) is connected to a primary frequency modulation test main station (3) of a dispatching center via a dispatching data network (2); the primary frequency modulation active test system (1) comprises a primary frequency modulation test substation communication management machine (11), a primary frequency modulation test substation test device (12) and a longitudinal encryption device (13); the primary frequency modulation test substation communication management machine (11) is connected to the primary frequency modulation test substation test device (12) via a network cable, and the primary frequency modulation test substation communication management machine (11) is connected to the dispatching data network (2) via the longitudinal encryption device (13).

2. The primary frequency modulation active test system according to claim 1, Features: The time input ends of the primary frequency modulation test substation communication management machine (11) and the primary frequency modulation test substation test device (12) are connected to the time output end of the clock synchronization system of the power plant or power station.

3. The primary frequency modulation active test system according to claim 2, Features: The primary frequency modulation test substation test device (12) is connected to the generator outlet CT (4) by hard wiring.

4. The primary frequency modulation active test system according to claim 3, Features: The primary frequency modulation test substation test device (12) is connected to the generator outlet PT (5) by hard wiring.

5. The primary frequency modulation active test system according to claim 4, Features: The primary frequency modulation test substation test device (12) is connected to the PMU (6) by hard wiring.

6. The primary frequency modulation active test system according to claim 5, Features: The primary frequency modulation test substation test device (12) is connected to the DCS (7) by hard wiring.

7. The primary frequency modulation active test system according to claim 6, Features: The primary frequency modulation test substation test device (12) is connected to the DEH (8) by hard wiring.

8. The primary frequency modulation active test system according to any one of claims 1 to 7, Features: The primary frequency modulation test substation test device (12) is connected to the CCS (9) by hard wiring.

9. The primary frequency modulation active test system according to any one of claims 1 to 7, Features: The primary frequency modulation active test system is arranged in a thermal power plant or a compressed air energy storage power station.

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