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Firm Frequency Response Testing & Commissioning (FFR) 

Pannell & Partners offers Firm Frequency Response Testing & Commissioning according to National Grid guidance & procedures.  
 
We cater for Grid connection commissioning for sites wishing to provide Firm Frequency Response Balancing Service with static / non-dynamic load shedding and dynamic variants. Our extensive experience with battery energy storage sites (BESS), load shedding sites and rotating machines requiring dynamic and non-dynamic testing as part of the commissioning process means we can provide the testing your installation requires to submit to the National Grid.  
 
Firm Frequency Response (FFR) is the change in active power delivered as a response to a change in system frequency. This change in active power can either be from its initial state or a predicted demand level. 
 
Firm Frequency Response is available in Non-Dynamic (also known as Static) and Dynamic Variants. With Non-Dynamic response, the change in active power is a specified value and occurs when the frequency rises or falls through set levels as required by the National Grid. In Dynamic response, the change in active power is proportional to the change in frequency. 
 
Our results are prepared and presented in the format required for submission to the National Grid. 
 
We are able to offer all frequency tests within the following: 
 
Non-Dynamic response (Static) FFR Testing 
Low Frequency (Primary & Secondary) 
High Frequency 
 
These non-dynamic low and high frequency tests aim to monitor the capability of the provider to deliver the minimum contracted level of response. 
 
Dynamic response FFR Testing 
Low Frequency primary & secondary response 
High Frequency 
 
The dynamic frequency tests aim to monitor the capability of the service provider to deliver appropriate dynamic response. 
 
Please contact us with your requirments and site specification so we may assist & provide the correct integration for FFR testing. 
 

 Basic Static FFR Pass Criteria 

Acceptable frequency profile(s). 
 
The relay (or equivalent) operating point of the plant occurs at the correct trigger frequnecy and within tolerance. 
 
Sustain response for required time. 
 
Standard deviation of active power error over prescribed period must not exceed 2.5% of the contracted active power change. 

 Basic Dynamic FFR Pass Criteria 

Delay in response of active power is no greater than 2 seconds. 
 
Minimum of the sampled values of active power within primary, secondary and high frequency timescales are within tolerances. 
 
Standard deviation of load error at steady state over a 180 second period must not exceed 2.5% of the contracted active power. 
 
Active power should progressively change to its contracted output 
 
A noticable change in power in the correct direction is observed. 

Contact us 

Please contact us for any of your electrical engineering requirements, where one of our engineers will be happy to assist your business. 
 
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