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Primary frequency regulation and automatic generation control (AGC) load regulation coordinated control method

A technology of coordinated control and load regulation, applied in the direction of a single AC network with different frequencies, AC network voltage adjustment, etc., can solve problems such as contradictions, and achieve the effect of ensuring stable operation, correct action, and ensuring stability

Active Publication Date: 2013-06-05
CHINA THREE GORGES CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for coordinated control of primary frequency regulation and AGC load regulation, which overcomes the conflict between primary frequency regulation and AGC load regulation in existing hydropower stations

Method used

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  • Primary frequency regulation and automatic generation control (AGC) load regulation coordinated control method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Step 1. Improve the governor control software.

[0042] Step 2. Improve the control software of the monitoring system.

[0043] Step 3. After completing the software modification, conduct a frequency regulation test of the actual unit, a frequency regulation and AGC load regulation coordinated control test, and determine relevant parameters according to the experimental situation, such as the PID parameters of the primary frequency regulation, after the primary frequency regulation state is restored. How long does it take, the monitoring system resumes active power regulation, etc.

[0044] Take the monitoring system’s cooperation mode of primary frequency regulation unit ESC and AGC, P regulation as an example:

Embodiment approach

[0045] ①. The ESC sends the "primary frequency modulation state" hard contact to the LCU device, and the LCU collects the SOE quantity. When the LCU collects the "primary frequency modulation state" input, it exits the PID calculation. When the "primary frequency modulation state" exits, the delay is 40s After that, resume the PID operation. Implementation method: add an output point and an intermediate relay to the electric adjustment device, and send a frequency modulation state to the LCU device through the empty contact point of the intermediate relay. Modify the switch measurement point screen and event list;

[0046] ②. The adjustment timeout protection is added to the P and Q adjustment process of the LCU device. When the LCU receives the adjustment order and executes the adjustment task, if the load is not adjusted in place after 2 minutes, it will exit the adjustment;

[0047] ③. In order to facilitate the analysis of the accident, the ESC is sent to the guide, the v...

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Abstract

The invention discloses a primary frequency regulation and automatic generation control (AGC) load regulation coordinated control method, which comprises the following steps: setting a condition for the participation of a speed governor in primary frequency regulation in speed governor control software; setting a primary frequency regulation proportional-integral-derivative (PID) control parameter in the speed governor; arranging a primary frequency regulation entering / exiting enabling switch in the speed governor; setting an external regulation command locking function in speed governor control software; setting a primary frequency regulation state output signal, which is to be transmitted to a monitoring system, in the speed governor; after the monitoring system receives the primary frequency regulation state signal, stopping active PID regulation computing, and after the primary frequency regulation signal state is restored for a curtain time, allowing the monitoring system to restore the active PID regulation computing to perform the active regulation of a machine set; and adding records on related information in the database of the monitoring system. The primary frequency regulation and AGC load regulation coordinated control method solves the relationship between the primary frequency regulation and the AGC load regulation coordinated control in a hydropower station and ensures the stable operation of the machine set.

Description

technical field [0001] The invention relates to a coordinated control method for primary frequency modulation and AGC load regulation, and belongs to the field of automatic control of hydropower stations. Background technique [0002] Because the grid frequency fluctuates frequently, the governor enters the primary frequency regulation very frequently. The contradiction between primary frequency regulation and power regulation can easily induce large fluctuations in unit load. Contents of the invention [0003] The invention provides a method for coordinated control of primary frequency regulation and AGC load regulation, which overcomes the conflict between primary frequency regulation and AGC load regulation in existing hydropower stations. By rationally improving the control software of the speed governor and monitoring device, it can complete the automatic control of the unit well. [0004] The object of the present invention is achieved like this: the method for prim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/02H02J3/12
Inventor 高晓明周劲峰胡燕花孙刚
Owner CHINA THREE GORGES CORPORATION
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