Gas turbine synchronous control system
By using the gas turbine synchronization control system and the synchronization interlock detection relay TJJ, the generator speed and excitation are adjusted quickly and accurately, which solves the problems of long detection time and low accuracy in the existing technology and realizes shock-free synchronous and differential frequency grid connection.
Patent Information
- Application Number
- CN202520595100.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-04-01
AI Technical Summary
When existing power plants are connected to the grid simultaneously, the large number of external detection relays results in excessively long detection times and low accuracy. This makes it impossible to adjust the generator speed and excitation in a timely manner, which can easily cause impacts during grid connection. Only same-frequency grid connection can be achieved, and differential-frequency grid connection cannot be achieved.
A gas turbine synchronizing control system is adopted, including a power supply circuit, an input circuit, a control circuit, a signal output circuit, and an AC circuit. A synchronizing interlock detection relay TJJ is used to detect analog quantities on the generator side and the grid side. The control circuit enables fast and accurate speed and excitation adjustment, simplifies wiring, and achieves differential frequency grid connection.
It shortens testing time, improves testing accuracy, simplifies wiring, and enables shock-free rapid grid connection, allowing for both same-frequency and differential-frequency grid connection.
Smart Images
Figure CN223707776U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power system technical field, concretely is a gas turbine synchronization control system. BACKGROUND
[0002] Current existing power plant synchronization is combined with the synchronization card of generator control system, cooperates external voltage detection relay, thereby realizes synchronization, but along with more intermediate relay in external detection, causes detection time to be too long and precision to be not high when synchronization card gathers voltage signal data, causes not timely adjustment generator speed and excitation, easily produces greater impact when synchronization, therefore can only realize synchronization, cannot realize difference frequency. SUMMARY
[0003] The utility model discloses a gas turbine synchronization control system that effectively shortens detection time, timely adjusts generator speed and excitation, can realize synchronization and also can realize impact-free difference frequency synchronization.
[0004] The utility model is realized thus:
[0005] A gas turbine synchronization control system, including power supply circuit, input circuit, control circuit, signal output circuit, AC circuit, the AC circuit is connected with the synchronization lockout detection relay TJJ for detecting generator side and power grid side analog quantity, the synchronization lockout detection relay TJJ is connected with control circuit.
[0006] According to the above-mentioned gas turbine synchronization control system, the 2nd, 4th, 6th and 8th ends of the synchronization lockout detection relay TJJ are respectively connected with the JK1_11 end, JK1_14 end, JK1_9 end and JK1_12 end of the AC circuit, the 1st end of the synchronization lockout detection relay TJJ is connected with the JK4_20 end of the control circuit, and the JK4_16 end, JK4_19 end, JK4_12 end and JK4_15 end of the control circuit are connected with the generator control system.
[0007] Compared with the prior art, the utility model has the advantages that:
[0008] The utility model reduces detection relays, shortens detection time, improves detection precision, simplifies wiring, timely adjusts generator speed and excitation, realizes synchronization and also realizes difference frequency synchronization. BRIEF DESCRIPTION OF DRAWINGS
[0009] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained without creative labor on the basis of these drawings.
[0010] Figure 1 is a structural principle schematic diagram of the present application;
[0011] Figure 2 is Figure 1 a backplate wiring diagram of
[0012] Figure 3 is a connection structure schematic diagram of the AC circuit and the synchronization lockout detection relay TJJ of the present application;
[0013] Figure 4 is a connection structure schematic diagram of the control circuit and the synchronization lockout detection relay TJJ of the present application;
[0014] Figure 5 is a wiring structure schematic diagram of the control circuit and the generator control system of the present application. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0016] Please refer to Figure 1 , a gas turbine synchronization control system, comprising a power supply circuit, an input circuit, a control circuit, a signal output circuit, an AC circuit, the AC circuit is connected with a synchronization lockout detection relay TJJ for detecting the generator side and the grid side analog quantity, the synchronization lockout detection relay TJJ is connected with the control circuit.
[0017] The 2nd end, 4th end, 6th end and 8th end of the synchronization blocking detection relay TJJ are respectively connected with the JK1_11 end, JK1_14 end, JK1_9 end and JK1_12 end of the AC circuit, the 1st end of the synchronization blocking detection relay TJJ is connected with the JK4_20 end of the control circuit, and the JK4_16 end, JK4_19 end, JK4_12 end and JK4_15 end of the control circuit are all connected with the generator control system.
[0018] When the generator needs to be connected to the grid, the synchronization device is put into operation, the AC circuit only needs to detect the analog quantity of the generator side and the grid side through the synchronization blocking detection relay TJJ and transmit to the control circuit, if the condition is not met, the control circuit will block the synchronization and grid connection function until the condition is met to release the blocking, if the condition is met, the control circuit will not block, and the control circuit captures the synchronization and grid connection opportunity, that is, all the synchronization voltage signals are collected by the synchronization device, and the external synchronization blocking detection relay TJJ is only used to judge and detect the voltage detection of the generator side and the grid side to judge whether the synchronization device is blocked, when the generator side and the grid side meet the condition, the control circuit realizes accurate regulation of the generator system by controlling the "acceleration", "deceleration", "voltage increase" and "voltage decrease" signal outlet relays, so that the generator control system and the excitation system can quickly reach the grid connection condition to realize fast grid connection without disturbance.
[0019] In the process of connecting the generator to the grid, the automatic frequency and voltage tracking of the automatic frequency and voltage regulating device of the to-be-connected generator set can be realized through the synchronization device, so that the pressure difference, frequency difference and angle difference can quickly enter the allowed range of quasi-synchronization, and when the frequency is different, the control scheme can be automatically selected and the current is automatically identified as difference frequency grid connection or same frequency grid connection, the parallel process is shortened, and faster grid connection is realized, when difference frequency grid connection is performed, the maximum lead angle is obtained according to the allowed frequency difference and closing time, the "synchronization blocking" contact point is connected when the phase angle is in the maximum lead angle range, so that the first grid connection opportunity can be accurately captured, and the non-impact grid connection can be accurately completed when the phase angle difference is zero.
[0020] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A gas turbine synchronous control system, comprising a power supply circuit, an input circuit, a control circuit, a signal output circuit, and an AC circuit, characterized in that: The AC circuit is connected to a synchronization lockout detection relay TJJ for detecting analog quantities between the generator side and the grid side, and the synchronization lockout detection relay TJJ is connected to the control circuit.
2. The gas turbine synchronous control system according to claim 1, characterized in that, Terminals 2, 4, 6, and 8 of the synchronizing interlock detection relay TJJ are connected to terminals JK1_11, JK1_14, JK1_9, and JK1_12 of the AC circuit, respectively. Terminal 1 of the synchronizing interlock detection relay TJJ is connected to terminal JK4_20 of the control circuit. Terminals JK4_16, JK4_19, JK4_12, and JK4_15 of the control circuit are all connected to the generator control system.